swadhin / justapi public

swadhinbiswas

[email protected]
2026-07-06 10:45:00 +0600 committed NaN years ago
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AGENTS.mdDECISIONS.mdPLAN.mdPROMPT.mdREADME.mdREVISION_LOG.mdSECURITY.md
▼AGENTS.md
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+# AGENTS.md
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+
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+> Operating rules for anyone — human or AI — working on justapi Runtime.
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+> Read this before touching code. If you are an AI agent resuming after a
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+> context reset, read this file and `PLAN.md` first, in that order.
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+
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+## 1. The one rule that overrides everything else
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+
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+Do not begin a phase in `PLAN.md` until the previous phase's exit criteria
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+are checked off there. If you're unsure whether a gate passed, check
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+`BENCHMARKS.md` and CI history — don't assume.
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+
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+## 2. Roles
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+
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+Even in single-agent execution, work through these lenses in sequence for
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+any non-trivial change — they catch different classes of mistakes:
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+
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+- **Core Runtime** — networking, protocol, memory, scheduler correctness and
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+ safety (`justapi-core`).
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+- **Python Bindings** — PyO3 boundary, GIL/free-threading correctness, the
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+ ASGI shim, native API (`justapi-py`).
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+- **Protocol/Security** — TLS, auth, JWT, OAuth2/OIDC, request validation,
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+ SAST scanning, fuzzing, anything parsing untrusted input.
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+ Every change here needs a fuzz target or an explanation of why not.
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+- **Data & Validation** — Pydantic-style schemas, DB ORM integration,
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+ serialization, type-safe request/response contracts, background tasks.
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+- **Resilience** — circuit breakers, graceful degradation, retry policies,
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+ rate-limit backpressure, connection pooling.
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+- **QA/Benchmark** — owns `BENCHMARKS.md`, the CI regression gate, and
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+ calling out unqualified performance claims. Target: beat FastAPI on every
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+ benchmark.
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+- **Platform/DX** — CLI, hot reload, OpenAPI generation, Docker/K8s tooling,
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+ multi-cloud deployment, `skills/` directory upkeep.
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+- **Observability** — distributed tracing (OTel), structured logging, metric
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+ dashboards, health checks, alerting integration.
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+
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+## 3. Conventions
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+
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+- **Commits:** `<phase>: <what changed>` e.g. `p3: add per-request arena
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+ allocator`. One logical change per commit.
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+- **Branches:** `phase-N/<short-description>`.
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+- **`unsafe` code:** every block needs a `// SAFETY:` comment explaining the
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+ invariant that makes it sound, and a test that would fail if the invariant
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+ were violated where feasible.
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+- **New dependency:** justify it in `DECISIONS.md` — what it replaces or
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+ enables, why the alternative (usually: writing it yourself) is worse.
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+- **Public API changes:** rustdoc/docstrings required before merge, not after.
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+- **Error handling:** use `anyhow::Result` in application code (CLI, bench);
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+ use typed errors (`thiserror`) in library crates (`justapi-core`,
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+ `justapi-py`) for errors that cross crate boundaries.
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+
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+## 4. Before opening a PR / calling a phase done
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+
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+- [ ] Tests pass (`cargo test --workspace`)
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+- [ ] `cargo clippy --workspace --tests -- -D warnings` clean (includes test code)
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+- [ ] `cargo fmt --check` clean
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+- [ ] `cargo miri test -p justapi-core` clean (if core touched)
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+- [ ] Benchmarks run, numbers appended to `BENCHMARKS.md` (not overwritten)
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+- [ ] No p99 regression >5% vs. previous phase without a `DECISIONS.md` entry
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+- [ ] `PLAN.md` updated: phase status, next steps
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+- [ ] New recurring pattern or gotcha? Add/update a `skills/*/SKILL.md`
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+
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+## 5. Resuming work after a context reset
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+
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+1. Read `PLAN.md` — find the current phase and its status.
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+2. Read the most recent `DECISIONS.md` entries for context on why things are
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+ the way they are.
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+3. Skim relevant `skills/*/SKILL.md` files for the area you're touching.
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+4. Check `BENCHMARKS.md` for the last recorded numbers so you know the bar.
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+5. Continue from where `PLAN.md` says to continue — don't restart planning
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+ from scratch.
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+
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+## 6. When something in the master prompt seems wrong
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+
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+It might be. If a requirement conflicts with something you've learned during
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+implementation (e.g., a benchmark shows a "required" custom scheduler isn't
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+needed, or a crate assumption in the master prompt is stale), write the
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+conflict and your recommendation into `DECISIONS.md` and proceed with the
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+better-informed choice. Don't silently deviate, and don't blindly follow a
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+now-wrong instruction either.
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+
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+## 7. Architecture quick reference
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+
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+```
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+justapi/
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+ Cargo.toml # workspace root
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+ crates/
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+ justapi-core/ # networking, protocol, scheduler, memory
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+ justapi-py/ # PyO3 bindings, ASGI shim, native API
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+ justapi-cli/ # `justapi` CLI binary
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+ justapi-bench/ # internal benchmark harness
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+ python/
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+ justapi/ # pip-installable Python package (maturin-built)
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+ skills/ # reusable knowledge modules
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+ benchmarks/ # workload scripts for baseline comparisons
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+ AGENTS.md # this file
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+ PLAN.md # living roadmap (single source of truth)
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+ DECISIONS.md # append-only ADR log
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+ BENCHMARKS.md # append-only results ledger
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+ PROMPT.md # master engineering prompt (reference only)
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+```
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+
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+### Request pipeline (target shape)
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+
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+```
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+Kernel → epoll/io_uring → Connection Manager → tokio task
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+ → TLS (rustls) → HTTP parse (hyper) → Router (matchit)
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+ → Middleware chain (Rust: auth/CORS/rate-limit/compression)
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+ → Python boundary (typed, zero-copy request view via PyO3 buffer protocol)
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+ → Application code (ASGI shim OR native handler)
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+ → Rust serializer (serde_json/simd-json)
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+ → Response write → Socket
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+```
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+
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+### Crate dependency graph
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+
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+```
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+justapi-cli → justapi-core
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+justapi-py → justapi-core
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+justapi-bench → justapi-core
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+```
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+
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+## 8. Key skills to consult
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+
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+| Area | Skill file |
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+|---|---|
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+| PyO3 / GIL / unsafe at the FFI boundary | `skills/rust-ffi-safety/SKILL.md` |
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+| Running & interpreting benchmarks | `skills/benchmark-harness/SKILL.md` |
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+
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+Add new skills as patterns emerge. A good skill saves the next session from
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+rediscovering a non-obvious invariant or workflow.
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▼DECISIONS.md
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+# DECISIONS.md
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+
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+> Append-only architecture decision record (ADR) log.
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+> Every deviation from PROMPT.md, every crate choice, every GIL/concurrency
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+> decision gets a dated entry: context, options considered, decision, and
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+> the evidence behind it.
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+
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+---
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+
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+## ADR-001 — 2026-07-03 — Crate defaults for v1.0
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+
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+**Context:** Phase 0 bootstrap. Choosing the dependency stack before any
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+implementation code, following PROMPT.md Section 1's "build vs. reinvent"
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+philosophy.
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+
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+**Options considered:**
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+1. Hand-roll everything (HTTP parser, TLS, scheduler) — rejected per
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+ Section 1; produces unmaintainable half-finished subsystems.
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+2. Use mature, audited crates per Section 1's table — selected.
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+
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+**Decision:** Default to the crate table from PROMPT.md Section 1:
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+
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+| Concern | Crate | Version |
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+|---|---|---|
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+| Async runtime | `tokio` (multi-thread) | 1.x |
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+| HTTP/1.1 + HTTP/2 | `hyper` + `hyper-util` + `http-body-util` | 1.x |
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+| TLS | `rustls` | (Phase 7) |
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+| Python bindings | `pyo3` | 0.29.x |
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+| Routing | `matchit` | (Phase 2, evaluate vs custom trie) |
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+| JSON | `serde_json` baseline, `simd-json` feature-flagged | 1.x |
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+| Rate limiting | `governor` | (Phase 5) |
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+| JWT | `jsonwebtoken` | (Phase 5) |
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+| CLI | `clap` | 4.x |
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+| Logging/tracing | `tracing` + `tracing-subscriber` | 0.1 / 0.3 |
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+| Error handling | `anyhow` (app code), `thiserror` (library boundaries) | 1.x |
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+
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+Custom replacements only after profiling shows the FFI boundary is the
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+bottleneck, with evidence attached to a new DECISIONS.md entry.
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+
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+**Evidence:** PROMPT.md Section 1 crate table. No profiling data yet.
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+
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+---
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+
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+## ADR-002 — 2026-07-03 — Repository skeleton layout
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+
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+**Context:** PROMPT.md Section 5.1 specifies the repo layout. Workspace
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+root is `/home/swadhin/RastAPI/` (directory name differs from the canonical
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+"justapi/" but crate names follow the spec).
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+
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+**Decision:** Follow Section 5.1 layout exactly:
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+- 4 crates: `justapi-core`, `justapi-py`, `justapi-cli`, `justapi-bench`
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+- Python package under `python/justapi/` built with maturin
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+- Skills under `skills/`
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+
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+No deviation from the specified structure.
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+
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+---
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+
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+## ADR-003 — 2026-07-03 — hyper 1.x requires hyper-util
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+
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+**Context:** The original skeleton used `hyper::server::conn::http1::Builder`
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+which existed in hyper 0.14 but was moved to `hyper-util` in hyper 1.x.
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+The server wouldn't compile without this crate.
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+
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+**Options considered:**
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+1. Downgrade to hyper 0.14 — rejected; 0.14 is legacy, 1.x is the
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+ maintained branch with the modular architecture we need.
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+2. Add `hyper-util` and `http-body-util` — selected; these are the official
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+ companion crates for hyper 1.x server usage.
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+
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+**Decision:** Add `hyper-util` (features: `tokio`, `http1`, `server`) and
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+`http-body-util` as workspace dependencies. The server connection handling
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+uses `hyper_util::server::conn::http1::Builder` and
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+`hyper_util::rt::TokioIo` for the stream wrapper.
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+
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+**Evidence:** hyper 1.0 migration guide, `hyper-util` crate documentation.
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+
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+---
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+
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+## ADR-004 — 2026-07-03 — PyO3 version: 0.29.x for Python 3.14 support
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+
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+**Context:** The development machine runs Python 3.14.6. PyO3 0.23.x does
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+not support Python 3.14. PyO3 0.24.x also failed to compile against
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+Python 3.14.6 — full support required 0.29.
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+
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+**Options considered:**
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+1. pyo3 0.23 — rejected; no Python 3.14 support.
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+2. pyo3 0.24 — rejected; still failed to compile against Python 3.14.6.
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+3. pyo3 0.29 — selected; compiles successfully against Python 3.14.6.
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+
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+**Decision:** Upgrade to `pyo3 = "0.29"` with `extension-module` feature.
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+
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+**Evidence:** Compilation failure with 0.23 and 0.24; successful build
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+with 0.29 on Python 3.14.6.
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+
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+---
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+
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+## ADR-005 — 2026-07-03 — Rust edition: 2021 (downgraded from 2024)
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+
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+**Context:** The original skeleton specified `edition = "2024"`. While the
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+Rust toolchain (1.96.0) supports it, edition 2024 caused compatibility
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+issues with some dependency crates during the bootstrap build.
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+
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+**Options considered:**
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+1. Keep edition 2024 and fix all dependency compatibility — higher risk,
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+ delays Phase 0 for no user-facing benefit.
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+2. Downgrade to edition 2021 — selected; maximizes dependency compatibility,
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+ can upgrade later when the ecosystem catches up.
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+
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+**Decision:** Use `edition = "2021"`. Revisit upgrading to 2024 once all
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+dependencies (especially pyo3, hyper-util) have confirmed 2024 support.
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+
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+**Evidence:** Build failures during Phase 0 bootstrap with edition 2024.
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+
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+---
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+
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+## ADR-006 — 2026-07-03 — Benchmark tooling: oha over wrk
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+
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+**Context:** PROMPT.md Section 10.1 recommends `oha` or `wrk`. Both are
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+HTTP load generators.
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+
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+**Options considered:**
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+1. `wrk` — mature, Lua scriptable, but reports only percentiles (not
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+ histogram), harder to install on some distros.
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+2. `oha` — Rust-based, outputs JSON with full latency distribution, easy
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+ to install via cargo, reports p50/p95/p99/p999 natively.
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+
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+**Decision:** Primary tool is `oha`. `wrk` as a secondary validation tool
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+if needed. `oha` version and exact command lines recorded in BENCHMARKS.md
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+alongside each run.
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+
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+**Evidence:** `oha` natively outputs the exact metrics BENCHMARKS.md needs
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+(p50/p95/p99, req/sec) in both human-readable and JSON formats.
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+
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+---
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+
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+## ADR-007 — 2026-07-03 — ASGI strategy: Tier A + Tier B per Section 2
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+
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+**Context:** PROMPT.md Section 2 requires both an ASGI compatibility shim
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+(Tier A) and a native justapi API (Tier B). Tier A is required for v1.0;
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+Tier B is the performance ceiling.
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+
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+**Decision:** Both tiers ship. Development order:
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+- Phases 1–9: Build the core runtime using Tier B (native) API internally
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+- Phase 10: Implement Tier A ASGI shim on top of the established core
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+
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+Rationale: The native API exercises the full pipeline and establishes
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+performance baselines. The ASGI shim is an adapter on top — building it
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+first would mean building the adapter before the thing it adapts.
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+
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+---
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+
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+## ADR-008 — 2026-07-03 — GIL strategy: dedicated Python worker thread
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+
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+**Context:** Phase 4 design decision for the execution model. justapi's
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+architecture split (Rust owns I/O, Python executes application logic) means
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+we must decide how to bridge the two worlds. The Python GIL (Global
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+Interpreter Lock) prevents multiple native OS threads from executing Python
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+bytecode concurrently. We need a concurrency model that maximizes throughput
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+while staying safe and simple.
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+
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+**Options considered:**
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+
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+### Option A — Dedicated Python worker thread (selected)
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+
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+A single OS thread owns the Python interpreter and runs all Python handlers.
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+Requests arriving via Rust's tokio async runtime are dispatched to this
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+thread via a lock-free or channel-based mechanism (e.g., `tokio::sync::mpsc`
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+or a `flume` channel). The Rust side never acquires the GIL directly — it
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+sends a job and awaits the result.
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+
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+Key properties:
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+- **GIL contention: zero.** Exactly one thread ever touches Python.
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+- **Concurrency:** Rust I/O is fully concurrent (tokio multi-thread
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+ scheduler). Python execution is serialized, which matches typical
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+ web-app profiles (I/O-bound inside Python — waiting on DB, external APIs).
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+- **Safety:** Great. No chance of accidentally blocking the tokio runtime
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+ with a slow Python call because Python runs on its own thread.
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+- **Complexity:** Low. A single producer-consumer channel. No GIL acquire/
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+ release logic scattered through the hot path.
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+
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+### Option B — Direct GIL acquisition on tokio worker threads
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+
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+Any tokio worker thread that needs to call Python acquires the GIL via
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+`Python::with_gil()`, runs the handler, then releases it. Multiple threads
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+may contend for the GIL.
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+
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+Key properties:
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+- **GIL contention:** High under load. If all N tokio workers are handling
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+ requests that need Python, N-1 threads are blocked on the GIL.
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+- **Concurrency:** Only one thread runs Python at a time, so no throughput
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+ gain vs Option A for Python-bound work. For Rust-only requests (static
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+ files, caching layer, etc.), all threads are available — same as Option A.
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+- **Safety:** Moderate risk. A slow Python call blocks the tokio worker
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+ thread, starving other tasks on that thread. Mitigation: use
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+ `tokio::task::spawn_blocking` for Python calls, which moves them off the
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+ async runtime.
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+- **Complexity:** Low in principle, but `spawn_blocking` + GIL interactions
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+ need careful handling in the PyO3 boundary.
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+
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+### Option C — Sub-interpreters (PEP 684)
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+
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+Each connection or request task gets its own Python sub-interpreter, each
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+with its own GIL. True parallelism for Python code.
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+
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+Key properties:
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+- **GIL contention:** Zero per-sub-interpreter; multiple interpreters run
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+ concurrently.
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+- **Concurrency:** True Python parallelism, but objects cannot be shared
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+ across interpreter boundaries. This breaks almost every Python web
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+ framework (they assume a single interpreter with shared globals).
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+- **Safety:** Low. Sub-interpreters in CPython have subtle isolation gaps.
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+ PyO3 support is experimental and incomplete.
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+- **Complexity:** Very high. Every Python object crossing the boundary
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+ must be serialized or copied.
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+- **Verdict:** Too immature for v1.0. Revisit for a future major version.
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+
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+### Option D — Free-threaded CPython (PEP 703, `--disable-gil`)
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+
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+CPython built with `--disable-gil` removes the GIL entirely. Multiple
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+threads can run Python bytecode simultaneously.
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+
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+Key properties:
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+- **GIL contention:** Zero (no GIL).
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+- **Concurrency:** True Python parallelism on CPU-bound workloads.
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+- **Safety:** Low-medium. `--disable-gil` is experimental in CPython 3.13.
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+ PyO3's `nogil` support is preliminary. The broader Python C-extension
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+ ecosystem is largely not thread-safe without the GIL.
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+- **Complexity:** Medium in PyO3 (needs `nogil` feature flag and careful
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+ review of all unsafe code). High in the ecosystem.
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+- **Verdict:** Promising long-term, but not ready for production v1.0.
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+ We will feature-flag support so early adopters can test.
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+
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+**Decision:**
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+
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+**Select Option A — dedicated Python worker thread** as the default for v1.0.
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+
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+Rationale:
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+
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+1. **Best match for workload profile.** Python web applications are
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+ I/O-bound within Python (database queries, external HTTP calls). A
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+ single Python thread driving async I/O via `asyncio` is the established
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+ pattern (uvicorn, gunicorn with async workers). Serializing Python
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+ execution doesn't bottleneck throughput — the bottleneck is Rust I/O
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+ and the downstream services Python calls.
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+
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+2. **Runtime safety.** Python never blocks a tokio worker thread. Slow or
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+ buggy Python code can't stall the I/O runtime. The Rust side remains
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+ responsive regardless of Python behavior.
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+
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+3. **Simplest correctness model.** No GIL acquire/release logic in the hot
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+ path. No risk of deadlocks involving the GIL + Rust locks. The channel
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+ boundary provides natural backpressure: if Python is slow, Rust buffers
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+ requests up to the channel capacity.
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+
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+4. **Clear upgrade path to Option D.** When free-threaded CPython matures,
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+ the single-worker-thread is replaced by "acquire GIL on any thread" code
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+ path behind a `py-nogil` feature flag. The channel dispatch layer is
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+ removed and Python calls happen inline on tokio workers.
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+
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+**Implementation sketch:**
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+
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+```rust
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+// Python worker runs in a dedicated OS thread.
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+// Rust handler sends requests via channel, awaits result.
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+let (tx, rx) = tokio::sync::mpsc::channel::<PythonJob>(256);
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+
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+// Spawn Python worker
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+std::thread::spawn(move || {
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+ Python::with_gil(|py| {
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+ // Load ASGI app, register handlers
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+ // Loop: receive jobs from rx, execute, send result back
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+ });
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+});
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+
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+// In the request handler (tokio task):
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+let job = PythonJob { request, response_tx };
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+tx.send(job).await?;
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+let response = response_tx.recv().await?;
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+```
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+
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+The channel acts as both dispatch mechanism and backpressure valve.
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+Channel capacity (256 by default) limits in-flight Python work. If the
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+channel is full, the Rust side can either buffer (via the BufferPool) or
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+respond with 503 Service Unavailable.
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+
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+**Feature flag for PEP 703 (`py-nogil`):**
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+
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+A Cargo feature `py-nogil` switches the execution model:
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+
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+- **default (`py-nogil` off):** Dedicated Python worker thread (Option A).
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+- **`py-nogil` on:** Direct GIL acquisition on tokio workers (Option A
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+ dispatch removed). Relies on CPython built with `--disable-gil` and
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+ PyO3's `nogil` support.
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+
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+This flag is hidden/unstable until PEP 703 ecosystem maturity improves.
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+It exists to prevent architectural deadlock — we can evolve toward it
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+without rewriting the dispatch layer.
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+
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+**Evidence:**
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+- CPython PEP 703 (free-threaded CPython) status: experimental in 3.13,
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+ targeting default-on in 3.14 or 3.15.
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+- PyO3 `nogil` feature tracking issue: currently experimental, API surface
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+ unstable.
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+- Typical Python web workload profile: I/O-bound inside Python handlers
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+ (database, cache, external API calls). CPU-bound Python workloads
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+ (ML inference, image processing) are a niche use case for app servers
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+ and should be offloaded to dedicated worker processes or task queues.
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+- Uvicorn + Gunicorn model: single Python thread per worker process,
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+ achieving production throughput via process-level parallelism (not
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+ thread-level). justapi's Rust I/O layer provides better single-process
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+ throughput than Gunicorn's prefork model.
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+
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+---
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+
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+## ADR-009 — 2026-07-03 — WebSocket: TCP-peek approach over hyper upgrade
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+
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+**Context:** Phase 8 WebSocket support. Hyper 1.x provides `hyper::upgrade::on(req)`
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+to upgrade HTTP/1.1 connections to WebSocket. This mechanism had persistent
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+`ResetWithoutClosingHandshake` errors with `tokio-tungstenite`.
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+
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+**Options considered:**
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+
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+### Option A — hyper upgrade mechanism (rejected)
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+
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+Call `hyper::upgrade::on(req)` inside the service function, return 101
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+response, spawn task to handle upgraded stream. Required careful ordering:
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+the upgrade future must not be awaited inside the service function (deadlock),
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+and `WebSocketStream::from_raw_socket` + `Role::Server` had protocol errors.
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+
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+Issues encountered:
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+- `hyper::upgrade::on` returning `ResetWithoutClosingHandshake` consistently
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+- Double-wrapping `Upgraded` in `TokioIo` caused confusion about trait bounds
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+- Service function return + upgrade completion ordering fragile
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+
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+### Option B — TCP-peek approach (selected)
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+
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+Peek at the first bytes of the TCP connection to detect WebSocket upgrade
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+requests before passing the stream to hyper. If the request looks like a
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+WebSocket upgrade, use `tokio_tungstenite::accept_async` directly on the
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+raw `TcpStream` (or `TlsStream<TcpStream>`).
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+
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+Key properties:
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+- **Reliability:** `tokio_tungstenite::accept_async` handles the full HTTP
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+ upgrade handshake correctly every time.
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+- **Simplicity:** No hyper upgrade state management, no ordering issues.
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+- **Generics:** `handle_ws_raw<S>` works over any `AsyncRead + AsyncWrite`,
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+ supporting both plain TCP and TLS connections.
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+- **Trade-off:** WebSocket connections bypass hyper entirely — no middleware,
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+ no arena allocation, no connection pool integration. Acceptable because
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+ WebSocket connections are long-lived and the hot path (message framing)
352
+ is handled by tokio-tungstenite.
353
+
354
+**Decision:** Select Option B — TCP-peek approach.
355
+
356
+**Evidence:**
357
+- Option A consistently produced `ResetWithoutClosingHandshake` in integration
358
+ tests despite correct header ordering and response construction.
359
+- Option B integration test (send "hello" → receive "hello") passed on first
360
+ attempt.
361
+- Production WebSocket servers (tungstenite examples, warp) commonly use
362
+ this approach.
363
+- `peek()` is non-blocking and reads only 4KB — negligible overhead per
364
+ connection.
365
+
366
+---
367
+
368
+## ADR-010 — 2026-07-03 — Response body type: UnsyncBoxBody
369
+
370
+**Context:** Phase 8 introduced SSE streaming responses. The existing
371
+`ResponseBody` type was `http_body_util::combinators::BoxBody<Bytes, anyhow::Error>`,
372
+which requires the inner body to be `Send + Sync + 'static`. Streaming bodies
373
+(like `StreamBody<ReceiverStream<...>>`) are not `Sync` because the underlying
374
+`tokio::sync::mpsc::Receiver` is `Send` but not `Sync`.
375
+
376
+**Options considered:**
377
+
378
+### Option A — BoxBody (Sync, rejected)
379
+
380
+Requires all response bodies to be `Sync`. Streaming bodies fail to compile.
381
+
382
+### Option B — UnsyncBoxBody (selected)
383
+
384
+`http_body_util::combinators::UnsyncBoxBody<Bytes, anyhow::Error>` only
385
+requires `Send + 'static` — drops the `Sync` bound. All existing static
386
+responses (`Full<Bytes>`) are still `Send + Sync`, so they satisfy the
387
+weaker bound. Streaming responses (`StreamBody`) are `Send` but not `Sync`,
388
+which now compiles.
389
+
390
+**Decision:** Use `UnsyncBoxBody` as the `ResponseBody` type alias.
391
+
392
+**Evidence:**
393
+- `BoxBody::new()` requires `B: Body + Send + Sync + 'static`
394
+- `UnsyncBoxBody::new()` requires `B: Body + Send + 'static`
395
+- `tokio::sync::mpsc::Receiver` is `Send` but not `Sync`
396
+- SSE streaming via `StreamBody<ReceiverStream<...>>` compiles with
397
+ `UnsyncBoxBody` but not `BoxBody`
398
+
399
+---
400
+
401
+---
402
+## ADR-011 — 2026-07-05 — Static file serving as 404 fallback
403
+
404
+**Context:** Phase 9 static file serving. The middleware chain handles all requests
405
+first. If it returns a 404, we try to serve a static file before returning 404
406
+to the client. If the middleware chain errors, we also try static files.
407
+
408
+**Options considered:**
409
+
410
+### Option A — Static files checked before middleware chain
411
+
412
+Check `StaticDir::resolve()` before running middleware. If a file matches, serve
413
+it directly without going through middleware.
414
+
415
+Pros: Slightly faster for static files (no middleware overhead).
416
+Cons: Static files bypass auth/CORS/rate-limit middleware — may expose protected
417
+files. Each path gets resolved twice (once by static check, once by chain on miss).
418
+
419
+### Option B — Static files as 404 fallback after middleware (selected)
420
+
421
+Run the full middleware chain first. If it returns 404 (or errors), then try to
422
+resolve and serve a static file.
423
+
424
+Pros:
425
+- Middleware applies to all requests consistently (auth protects static files too).
426
+- Single path resolution in the common case (dynamic route hit or cache hit).
427
+- Lets middleware override static file routes (e.g., `/index.html` blocked by auth).
428
+
429
+Cons: Static file requests always incur middleware overhead. Acceptable because
430
+the middleware chain is lightweight (~0.18% overhead per Phase 5 benchmark).
431
+
432
+**Decision:** Select Option B — static file serving as 404 fallback after middleware.
433
+
434
+**Evidence:** Phase 5 benchmark showed middleware overhead of 0.18% (negligible).
435
+Security principle: middleware should apply uniformly to all requests.
436
+
437
+---
438
+
439
+## ADR-012 — 2026-07-05 — Metrics via atomic counters (no Prometheus client)
440
+
441
+**Context:** Phase 9 metrics. We need to expose basic metrics at `/metrics` in
442
+Prometheus text format.
443
+
444
+**Options considered:**
445
+
446
+### Option A — Prometheus Rust client library (`prometheus` or `prometheus-client`)
447
+
448
+Full Prometheus client with histogram support, registry, automatic
449
+`/metrics` endpoint. Adds ~20 dependencies.
450
+
451
+Pros: Rich metric types (histograms, summaries), automatic handling of
452
+concurrent access, well-known API.
453
+Cons: Heavy dependency tree, overkill for 5 simple counters/gauge.
454
+Histogram support adds memory overhead per-bucket.
455
+
456
+### Option B — Atomic counters with manual formatting (selected)
457
+
458
+Use `AtomicU64` for each metric, format Prometheus text on demand at
459
+`/metrics` endpoint. No external client library.
460
+
461
+Pros: Zero additional dependencies, minimal overhead (single atomic increment
462
+per metric update), full control over output format.
463
+Cons: No built-in histogram support, need to write Prometheus text format
464
+manually.
465
+
466
+**Decision:** Select Option B — atomic counters with manual Prometheus formatting.
467
+
468
+**Evidence:**
469
+- Only 5 metrics needed: 4 counters (requests, errors, bytes_in, bytes_out)
470
+ + 1 gauge (active_connections).
471
+- Histograms can be added later if profiling shows they're needed
472
+ (typically via external metrics pipeline, not in-process).
473
+- Prometheus text format for counters/gauges is trivial to produce:
474
+ `# HELP`, `# TYPE`, `metric_name value` lines.
475
+
476
+---
477
+
478
+---
479
+## ADR-013 — 2026-07-05 — ASGI shim: dedicated thread + channel dispatch
480
+
481
+**Context:** Phase 10 Tier A ASGI compatibility shim. We need to run existing
482
+Python ASGI applications (FastAPI, Starlette) on justapi's Rust runtime.
483
+
484
+**Options considered:**
485
+
486
+### Option A — Inline GIL acquisition on tokio workers
487
+
488
+Acquire the Python GIL inside each request handler (tokio worker thread).
489
+Use `pyo3_asyncio::tokio::into_awaitable` to bridge Python asyncio coroutines
490
+to Rust futures.
491
+
492
+Pros: No extra thread, simpler architecture.
493
+Cons: Blocks tokio worker during Python execution (violates ADR-008 constraint).
494
+`pyo3-asyncio` adds a complex dependency. Risk of GIL deadlocks.
495
+
496
+### Option B — Dedicated Python worker thread with channel dispatch (selected)
497
+
498
+A single OS thread holds the GIL permanently and runs a persistent asyncio
499
+event loop. Rust sends raw HTTP request data (method, path, headers, body)
500
+via `std::sync::mpsc` and receives the response via `tokio::sync::oneshot`.
501
+The Python thread builds the ASGI scope dict, creates `receive`/`send` async
502
+functions, and calls `await app(scope, receive, send)`.
503
+
504
+Pros:
505
+- **ADR-008 compliant:** zero GIL contention, tokio workers never blocked by Python
506
+- **No pyo3-asyncio dependency:** asyncio event loop managed entirely in Python
507
+- **Simple data contract:** plain Rust structs across the channel boundary
508
+- **Backpressure:** bounded channel capacity naturally limits in-flight Python work
509
+
510
+Cons:
511
+- Extra context switch per request (channel send + recv + oneshot round-trip)
512
+- No concurrent Python execution (serialized on the single worker thread)
513
+- Response body fully buffered in memory (no streaming for large responses)
514
+
515
+### Decision: Select Option B — dedicated Python worker thread.
516
+
517
+**Evidence:**
518
+- ADR-008 established this as the correct GIL strategy for justapi
519
+- `pyo3-asyncio` is not needed: the Python side runs `loop.run_until_complete()`
520
+ on each request, using a persistent event loop created once at startup
521
+- The `call_asgi()` Python helper is embedded as a `const &str` and compiled
522
+ via `PyModule::from_code` — no separate Python file to manage
523
+
524
+**Known limitations (tracked for resolution):**
525
+- Streaming request/response bodies not yet supported (body is fully buffered)
526
+- ASGI lifespan protocol not yet implemented (no startup/shutdown events)
527
+- Single Python worker thread means serialized Python execution
528
+
529
+---
530
+
531
+## Open questions / risk register
532
+
533
+Track these and resolve as phases progress:
534
+
535
+- [ ] `tokio-uring` / `monoio` evaluation — scheduled for Phase 0 spike if
536
+ time permits, otherwise deferred. epoll via `tokio` is the default and
537
+ mandatory fallback regardless.
538
+- [ ] Free-threaded CPython (PEP 703) ecosystem maturity for PyO3 0.29 —
539
+ confirm before committing Phase 4 design.
540
+- [ ] Sub-interpreter isolation guarantees — research needed before Phase 4.
541
+- [ ] `quinn` / HTTP-3 crate maturity — evaluate at Phase 10 time.
542
+- [ ] ASGI shim edge cases (lifespan protocol, streaming responses, WebSocket
543
+ close codes) — track known gaps explicitly in Phase 10.
544
+
545
+---
546
+
547
+## ADR-014 — 2026-07-05 — Project rename: Hyperion → JustAPI
548
+
549
+**Context:** Phase 10 completion. The project needs a name that reflects its
550
+ambition (comparable to FastAPI) and positions it for production-grade adoption.
551
+"Hyperion" was the working name from the original master prompt.
552
+
553
+**Decision:** Rename to **JustAPI** — simple, memorable, domain-available.
554
+All crates renamed: `hyperion-core` → `justapi-core`, `hyperion-py` → `justapi-py`,
555
+`hyperion-cli` → `justapi-cli`, `hyperion-bench` → `justapi-bench`.
556
+Python package renamed: `hyperion` → `justapi`. Class renamed: `HyperionApp` → `JustAPIApp`.
557
+Metrics prefix renamed: `hyperion_*` → `justapi_*`.
558
+
559
+**Evidence:** Name check: domain available, PyPI name available, no trademark conflicts.
560
+
561
+---
562
+
563
+## ADR-015 — 2026-07-05 — Validation strategy: Rust-native + Pydantic bridge
564
+
565
+**Context:** Phase 11 — Request Validation & Serialization. Need to decide
566
+how to handle type-safe validation.
567
+
568
+**Decision:** Two-tier approach:
569
+1. **Rust-native (Tier B):** `Schema` derive macro + `serde` + `validator` crate.
570
+ Validates at Rust speed — target 10x faster than Pydantic.
571
+2. **Pydantic bridge (Tier A):** Python `BaseModel` → Rust struct via PyO3
572
+ `FromPyObject`. Runs alongside the Rust-native path for compatibility.
573
+
574
+Error format follows RFC 9457 (Problem Details for HTTP APIs).
575
+
576
+**Evidence:** Pydantic v2 is ~5-10x faster than v1 but still has Python overhead.
577
+Rust-native validation eliminates Python serialization entirely for the hot path.
578
+
579
+---
580
+
581
+## ADR-016 — 2026-07-05 — Database strategy: sqlx with compile-time checks
582
+
583
+**Context:** Phase 12 — Database ORM Integration. Need async SQL driver.
584
+
585
+**Decision:** Use `sqlx` as the async SQL driver:
586
+- Compile-time query checking (`sqlx::query!("SELECT ...")`)
587
+- Connection pooling built-in
588
+- Multi-DB (PostgreSQL, MySQL, SQLite)
589
+- Migration system built-in
590
+
591
+Query builder inspired by Diesel/SeaORM for Tier B; SQLAlchemy bridge for Tier A.
592
+
593
+**Evidence:** `sqlx` is the most popular async SQL driver in Rust, with compile-time
594
+query verification that eliminates an entire class of runtime errors.
595
+
596
+---
597
+
598
+## ADR-017 — 2026-07-05 — Deployment strategy: Helm + distroless + CI/CD
599
+
600
+**Context:** Phase 16 — Multi-Cloud / Kubernetes Support.
601
+
602
+**Decision:**
603
+- Distroless base image (< 50MB, no shell)
604
+- Helm chart as primary K8s deployment mechanism
605
+- Health probes via existing `/health`/`/ready`/`/live` endpoints
606
+- GitHub Actions CI → container registry → K8s deploy
607
+- Cloud-specific docs for GKE, EKS, AKS, Fly.io, Railway
608
+
609
+**Evidence:** Distroless images reduce attack surface. Helm is the standard
610
+K8s packaging format. Multi-cloud strategy avoids vendor lock-in.
611
+
612
+---
613
+
614
+## ADR-018 — 2026-07-05 — Security strategy: SAST in CI, fuzzing, OWASP baseline
615
+
616
+**Context:** Phase 17 — Zero-Day / SAST / Security Hardening.
617
+
618
+**Decision:**
619
+- `cargo-audit` + `cargo-deny` + `trivy` in CI as gating checks
620
+- `cargo-fuzz` / `libfuzzer` for Rust fuzz targets, `Atheris` for Python
621
+- OWASP Top 10 as security baseline
622
+- All security fixes documented with CVE reference where applicable
623
+- Continuous fuzzing for all parsing paths
624
+
625
+**Evidence:** OWASP Top 10 is the industry standard web security baseline.
626
+`cargo-audit` catches known vulnerabilities in dependency tree.
627
+
628
+---
629
+
630
+## ADR-019 — 2026-07-05 — Plugin strategy: trait-based, compile-time registration
631
+
632
+**Context:** Phase 19 — Plugin System & Extensibility.
633
+
634
+**Decision:**
635
+- `Plugin` trait with lifecycle hooks (`pre_route`, `post_route`, `on_startup`, `on_shutdown`)
636
+- Compile-time plugin registration for Rust plugins
637
+- `JustAPIApp.use(plugin)` for Python plugins
638
+- Plugins run in the Rust middleware chain (no Python overhead for Rust plugins)
639
+- Plugin isolation via panic boundaries (catch_unwind)
640
+
641
+**Evidence:** Trait-based design is idiomatic Rust. Middleware chain integration
642
+means plugins get full performance. Python plugin API enables third-party ecosystem.
643
+
644
+---
645
+
646
+## ADR-020 — 2026-07-05 — Performance target: beat FastAPI on every benchmark
647
+
648
+**Context:** Phase 20 — Benchmark & Optimization.
649
+
650
+**Decision:** FastAPI is the competition to beat. All Phases 11-19 must include
651
+benchmark gates that compare against FastAPI. If any benchmark shows FastAPI
652
+faster, it's a blocking bug.
653
+
654
+Target metrics:
655
+- Throughput: 2x on hello-world, 3x on JSON echo
656
+- Latency p99: < 0.5ms (FastAPI ~2ms)
657
+- Memory: 2x requests per MB
658
+- Startup: < 10ms cold (FastAPI ~300ms)
659
+- Image size: < 50MB (FastAPI ~200MB)
660
+- Test speed: 5x faster than TestClient
661
+
662
+**Evidence:** Phase 1 already showed 2.4x vs Granian on hello-world. Rust gives
663
+a fundamental performance advantage; the gap should widen as optimization progresses.
664
+
665
+---
666
+
667
+## ADR-021 — 2026-07-05 — GIL-free architecture: remove dedicated Python worker thread
668
+
669
+**Context:** Phase 13 testing utilities required `JustAPITestClient` to run synchronously without a separate server process. The dedicated Python worker thread (ADR-008) made this impossible — it required an OS thread running a tokio runtime + Python event loop.
670
+
671
+**Problem:** The dedicated worker thread architecture from ADR-008 prevented:
672
+1. Synchronous test client execution (needed to start/finish per-request without thread lifecycle)
673
+2. Pool initialization inside `py.detach()` closures (worker thread owned the GIL)
674
+3. Request-response cycle that starts and completes within a single function call
675
+
676
+**Options considered:**
677
+
678
+### Option A — Keep worker thread, add test-mode bypass (rejected)
679
+
680
+Add a flag to skip the worker thread when running tests. Would create two code paths (production vs test) with risk of divergence.
681
+
682
+### Option B — Remove worker thread, GIL-free `Python::try_attach` everywhere (selected)
683
+
684
+Remove the dedicated Python worker thread entirely. Use `Python::try_attach()` from any tokio worker thread. This function safely acquires the GIL via `PyGILState_Ensure` regardless of which OS thread calls it.
685
+
686
+Key properties:
687
+- **No extra OS thread:** Saves ~1MB per worker, removes thread lifecycle management
688
+- **`OnceLock<HelperFunctions>`:** Helper module (Python code that builds request dicts and calls user handlers) compiled once, cached globally with `Py<PyAny>` (which is `Send + Sync + 'static`)
689
+- **Pool initialization:** Works inside `py.detach()` closure before server starts — critical for `JustAPITestClient` where pool must be ready before any request
690
+- **`call_python_handler`:** Shared function used by both `run()` and `JustAPITestClient` — single code path for production and testing
691
+
692
+**Decision:** Select Option B — remove dedicated Python worker thread. `Python::try_attach` for GIL acquisition, `py.detach()` for releasing GIL during blocking `rt.block_on`.
693
+
694
+**Evidence:**
695
+- `Python::try_attach()` uses `PyGILState_Ensure` internally — works from any OS thread, no prior GIL state required
696
+- `OnceLock<Py<PyAny>>` is safe because `Py<PyAny>` implements `Send + Sync + 'static` via PyO3's Send/Sync bounds
697
+- Works with both GIL-ful and free-threaded Python 3.14
698
+- All 43 Python integration tests pass with the new architecture
699
+
700
+---
701
+
702
+## ADR-022 — 2026-07-05 — TestClient: tokio duplex + hyper HTTP/1.1 parser (no TCP)
703
+
704
+**Context:** Phase 13 testing utilities. Need a synchronous test client in Rust that runs requests through the full pipeline without opening a TCP socket.
705
+
706
+**Options considered:**
707
+
708
+### Option A — TCP loopback (rejected)
709
+
710
+Open a real TCP connection to `127.0.0.1:0` for each test. Adds ~100μs per connection for TCP handshake + teardown.
711
+
712
+### Option B — tokio duplex + hyper HTTP/1.1 parser (selected)
713
+
714
+Use `tokio::io::duplex()` to create a pair of (reader, writer) in-memory byte streams. Write raw HTTP request bytes to the writer, pipe the reader through `hyper::http1::Builder::serve_connection` with the handler as the service function.
715
+
716
+Key properties:
717
+- **No TCP:** All in-memory, sub-millisecond per request
718
+- **Full pipeline:** Hyper HTTP/1.1 parser still runs — headers, body framing, connection lifecycle are real
719
+- **`Content-Length: 0` required:** Hyper's HTTP/1.1 parser fails with "connection closed before message completed" if response doesn't include `Content-Length` for non-chunked responses
720
+
721
+**Decision:** Select Option B — tokio duplex + hyper HTTP/1.1 parser.
722
+
723
+**Evidence:**
724
+- Sub-millisecond test latency achieved (vs ~1-2ms for TCP loopback)
725
+- Hyper parses both request and response, ensuring real HTTP behavior
726
+- `Content-Length: 0` is always included in the response builder
727
+
728
+---
729
+
730
+## ADR-023 — 2026-07-05 — Snapshot testing: custom implementation over `insta`
731
+
732
+**Context:** Phase 13 testing utilities. Need snapshot testing similar to Jest/insta but integrated with Python `JustAPITestClient`.
733
+
734
+**Options considered:**
735
+
736
+### Option A — `insta` crate (rejected)
737
+
738
+Rust snapshot testing crate. Would require calling Rust from Python to compare snapshots, adding complexity to the FFI boundary. No native Python integration.
739
+
740
+### Option B — Custom Python `Snapshot` class (selected)
741
+
742
+`Snapshot` class with `assert_match()`, `assert_response()`, `assert_body()` methods. `.snap` files stored in `__snapshots__/` directory next to the test file. Caller detection via `inspect.stack()` frame walk. `SNAPSHOT_UPDATE=1` env var for auto-accepting new snapshots. Unified diff output on mismatch.
743
+
744
+**Decision:** Select Option B — custom Python `Snapshot` class.
745
+
746
+**Evidence:**
747
+- Tighter Python integration (no FFI calls for snapshot comparison)
748
+- Unified diff output is human-readable
749
+- `SNAPSHOT_UPDATE=1` pattern matches Jest/insta UX
750
+- 10 Python tests for snapshot functionality
751
+
752
+---
753
+
754
+## ADR-024 — 2026-07-05 — Bucket-based latency histograms over HDR Histogram
755
+
756
+**Context:** Phase 14 enhanced metrics. Need latency histograms with percentile computation (p50/p95/p99/p999) for Prometheus output.
757
+
758
+**Options considered:**
759
+
760
+### Option A — `hdrhistogram` crate (rejected)
761
+
762
+Full HDR Histogram implementation. Adds a new dependency with complex internal data structures. Overkill for 13 fixed buckets.
763
+
764
+### Option B — Bucket-based histograms with `AtomicU64` (selected)
765
+
766
+13 Prometheus-compatible buckets (1ms, 2ms, 5ms, 10ms, 25ms, 50ms, 100ms, 250ms, 500ms, 1000ms, 2500ms, 5000ms, 10000ms). Each bucket is an `AtomicU64` counter. Percentiles computed from bucket distribution during `snapshot()`. Zero-allocation on the record path.
767
+
768
+**Decision:** Select Option B — bucket-based histograms.
769
+
770
+**Evidence:**
771
+- Zero allocation on record path (single `AtomicU64::fetch_add(1, Relaxed)`)
772
+- Percentiles computed from cumulative bucket counts at query time
773
+- Prometheus-rendered as `justapi_request_duration_ms_bucket{le="..."}` counters
774
+- 8 unit tests covering percentiles, bucket accumulation, and Prometheus output
775
+
776
+---
777
+
778
+## ADR-025 — 2026-07-05 — Structured logging: tracing-subscriber json + tracing-appender
779
+
780
+**Context:** Phase 14 structured logging. Need JSON log output with configurable levels and file rotation. No custom JSON serializer wanted.
781
+
782
+**Options considered:**
783
+
784
+### Option A — Custom JSON logger (rejected)
785
+
786
+Write JSON formatting manually. Higher maintenance burden, risk of formatting bugs.
787
+
788
+### Option B — `slog` crate (rejected)
789
+
790
+Alternative structured logging ecosystem. Less ecosystem support than tracing, not compatible with `tracing` crate's existing usage.
791
+
792
+### Option C — `tracing-subscriber` json feature + `tracing-appender` (selected)
793
+
794
+`tracing-subscriber`'s built-in JSON layer handles structured JSON output. `tracing-appender` provides non-blocking file writers with daily/hourly rotation. `NonBlocking` writer backed by `WorkerGuard` stored in `OnceLock<Mutex<Option<WorkerGuard>>>` for safe global access.
795
+
796
+**Decision:** Select Option C — tracing-subscriber json + tracing-appender.
797
+
798
+**Evidence:**
799
+- No new logging infrastructure to learn — leverages existing tracing ecosystem
800
+- `tracing-subscriber` `json` feature is mature and well-documented
801
+- `tracing-appender` `NonBlocking` writer prevents file I/O from blocking request handling
802
+- Environment filter via `RUST_LOG` env var works transparently
803
+
804
+---
805
+
806
+## ADR-026 — 2026-07-05 — Health check system: composable registry over static endpoints
807
+
808
+**Context:** Phase 14 health checks. Need pluggable health probes that can validate DB, cache, and upstream services.
809
+
810
+**Options considered:**
811
+
812
+### Option A — Static `/health`/`/ready`/`/live` endpoints (rejected)
813
+
814
+Hard-coded health endpoints. Not extensible — adding a new health check requires modifying server.rs.
815
+
816
+### Option B — `HealthRegistry` with pluggable `HealthCheck` trait (selected)
817
+
818
+`HealthRegistry` struct with `register(Box<dyn HealthCheck>)` and `register_fn(name, F)`. `check_all()` runs all registered checks and aggregates results. `health_response()` generates HTTP response (200 for all healthy, 503 for any unhealthy). `DbHealthCheck` under `db` feature flag.
819
+
820
+**Decision:** Select Option B — composable HealthRegistry.
821
+
822
+**Evidence:**
823
+- Backward-compatible with existing static `/health` response
824
+- `DbHealthCheck` reuses existing `AnyPool::health_check_all()` from Phase 12
825
+- 6 unit tests covering healthy, degraded, unhealthy, and mixed states
826
+
827
+---
828
+
829
+## ADR-027 — 2026-07-05 — Alerting: HTTP-only webhook dispatcher over `reqwest`
830
+
831
+**Context:** Phase 14 alerting. Need to send webhook notifications to Slack, PagerDuty, and generic endpoints.
832
+
833
+**Options considered:**
834
+
835
+### Option A — `reqwest` crate (rejected)
836
+
837
+Full async HTTP client. Adds ~30 dependencies to the dependency tree. Significant compile time increase.
838
+
839
+### Option B — Manual HTTP POST via `tokio::net::TcpStream` (selected)
840
+
841
+Construct raw HTTP/1.1 POST requests manually over `tokio::net::TcpStream`. Build request bytes in a `Vec<u8>` (method, path, headers, body), write to stream, read response.
842
+
843
+**Decision:** Select Option B — HTTP-only POST via raw TcpStream.
844
+
845
+**Evidence:**
846
+- Avoids adding `reqwest` as a dependency (justapi-core stays lean)
847
+- Only HTTP POST needed (no GET, PUT, DELETE, streaming, cookie handling)
848
+- Slack and PagerDuty webhooks accept POST only
849
+- HTTPS requires `rustls` client — not implemented; users can proxy through a local HTTP gateway
850
+- 3 unit tests for payload builders (Slack, PagerDuty, severity filtering)
851
+
852
+---
853
+
854
+## ADR-028 — 2026-07-05 — Audit logging: HandlerFn wrapper over Middleware trait
855
+
856
+**Context:** Phase 14 audit logging. Need to log requests to sensitive endpoints with method, path, status, and duration.
857
+
858
+**Options considered:**
859
+
860
+### Option A — Middleware trait implementation (rejected)
861
+
862
+Implement the `Middleware` trait for `AuditLogging`. Would run inside the middleware chain, capturing pre-request state.
863
+
864
+### Option B — `HandlerFn` wrapper via `wrap_handler()` (selected)
865
+
866
+`AuditLogging::wrap_handler()` takes a `HandlerFn` and returns a new `HandlerFn` that wraps the original. This is designed to be the last wrapper before the middleware chain, ensuring it captures the final status after all middleware processes the request.
867
+
868
+**Decision:** Select Option B — HandlerFn wrapper.
869
+
870
+**Evidence:**
871
+- `HandlerFn` wrapper is simpler than implementing the `Middleware` trait
872
+- Placed at the end of the wrapper chain, captures final response status
873
+- Structured `tracing::info!` with `audit=true` field enables log filtering
874
+- 2 unit tests covering default and custom audit rules
875
+
876
+---
877
+
878
+## ADR-029 — 2026-07-05 — Panic recovery: `catch_unwind` over tokio task abort
879
+
880
+**Context:** Phase 14 panic recovery. Need to prevent panics in user handlers from crashing the server.
881
+
882
+**Options considered:**
883
+
884
+### Option A — Tokio task abort (rejected)
885
+
886
+Set up a task lifecycle hook that detects panics and aborts the task. Limited control over the panic response — tokio's default panic handling just terminates the task.
887
+
888
+### Option B — `std::panic::catch_unwind` + `FutureExt::catch_unwind` (selected)
889
+
890
+Wrap the `BoxFuture` handler with `FutureExt::catch_unwind`. If the future panics, `catch_unwind` catches the panic and returns `Err(PanicInfo)`. This is converted to a 500 JSON response: `{"error":"Internal server error"}`.
891
+
892
+Additionally, set a custom panic hook via `std::panic::set_hook` that logs the panic message and location via `tracing::error!(panic=true, ...)`. The default hook behavior is preserved.
893
+
894
+**Decision:** Select Option B — catch_unwind on the BoxFuture.
895
+
896
+**Evidence:**
897
+- `FutureExt::catch_unwind` wraps the future at the point of execution — no tokio task lifecycle changes
898
+- Custom panic hook logs stack trace information
899
+- 500 JSON response ensures the client doesn't hang on a panic
900
+- `anyhow::Error` from handler is also converted to 500
901
+- 1 unit test verifying panic recovery returns a handler function
902
+
903
+- [ ] `tokio-uring` / `monoio` evaluation — deferred. epoll via `tokio` is the default.
904
+- [ ] Free-threaded CPython (PEP 703) maturity for PyO3 — monitor.
905
+- [ ] Sub-interpreter isolation guarantees — deferred for v1.0.
906
+- [ ] `quinn` / HTTP-3 crate maturity — evaluate at Phase 20.
907
+- [ ] Pydantic bridge performance — if Pydantic bridge is too slow, consider dropping Tier A ASGI shim for Phase 11+ features.
908
+- [ ] sqlx compile-time checks — may increase compile times. Evaluate trade-off vs runtime query building.
909
+
910
+---
911
+
912
+## ADR-030 — 2026-07-10 — Native inference engine: Candle (Rust), not torch delegation
913
+
914
+**Context:** JustAPI's 2026 differentiation thesis is "best for model deploying"
915
+with *native GPU* support. FastAPI delegates all GPU work to `torch` under the
916
+GIL, which is the bottleneck it can never remove. To beat FastAPI for inference
917
+we must own the GPU execution path in Rust.
918
+
919
+**Options considered:**
920
+1. Keep delegating to `torch`/`transformers` via PyO3 (current state) — rejected:
921
+ keeps the GIL bottleneck, adds no native advantage, just repackages FastAPI.
922
+2. **Candle** (HuggingFace Rust ML framework: CUDA/ROCm/Metal/CPU backends,
923
+ safetensors/GGUF loaders, KV-cache + FlashAttention kernels) — **selected**.
924
+3. `burn` (Rust DL framework, backend-agnostic) — strong, but smaller model
925
+ coverage and weaker LLM/quantization ecosystem than Candle today.
926
+4. `llm` / llama.cpp bindings — excellent for GGUF but narrower (no training,
927
+ weaker multimodal/agent tooling); good later as a quantized backend.
928
+
929
+**Decision:** Build a new `justapi-inference` crate on **Candle** as the native
930
+GPU inference engine. Python handlers call into it through the existing PyO3
931
+zero-copy (Arrow/DLPack) boundary; heavy compute runs in Rust with no GIL.
932
+`burn` and llama.cpp remain candidate backends behind a trait for Phase 45+.
933
+
934
+**Evidence:**
935
+- 2026 landscape (vLLM/SGLang/TGI/TensorRT-LLM) confirms the engine layer is
936
+ what defines GPU efficiency; FastAPI sits strictly below it.
937
+- Candle gives Rust-native CUDA/ROCm, KV cache, FlashAttention, and quantization
938
+ without leaving the Rust runtime we already control.
939
+- Reuses existing `memory` crate (arena/pool) for KV-cache block allocation.
940
+
941
+---
942
+
943
+## ADR-031 — 2026-07-10 — Two-layer architecture: engine + control plane
944
+
945
+**Context:** Research shows production model serving splits into (a) an
946
+*inference engine* (vLLM/SGLang/TGI — owns GPU, batching, KV cache) and
947
+(b) a *serving control plane* (Ray Serve / NVIDIA Dynamo / AIBrix / Ouranos —
948
+owns OpenAI API, routing, autoscaling, registry). JustAPI currently has web
949
+framework + partial control-plane primitives (rate-limit, circuit-breaker,
950
+health, DAG) but **no engine layer**.
951
+
952
+**Decision:** Implement both layers inside JustAPI:
953
+- **Engine (Phase 41-45):** `justapi-inference` — Candle-backed load/generate,
954
+ paged KV cache, continuous-batching scheduler, quantization, multi-LoRA.
955
+- **Control plane (Phase 44, 46):** OpenAI-compatible API, model registry,
956
+ KV-aware/LoRA-aware routing, LLM-specific autoscaling, multi-replica.
957
+This avoids a hard dependency on an external engine (unlike Ray Serve, which
958
+*orchestrates* vLLM but does not implement one).
959
+
960
+**Evidence:** Dynamo/AIBrix/Ouranos all wrap vLLM-class engines; owning the
961
+engine is what lets JustAPI be a single self-contained "deploy a model" binary
962
+(Rust speed + GPU + Python DX) rather than glue code.
963
+
964
+---
965
+
966
+## ADR-032 — 2026-07-10 — PyPI distribution: single abi3 wheel + manylinux_2_28 build
967
+
968
+**Context:** `justapi` PyPI name is available (verified 404). The package must
969
+ship one wheel covering CPython 3.11-3.14.
970
+
971
+**Decision:**
972
+- Build a single **abi3** wheel (`cp311-abi3`) via `abi3-py311 = true` in
973
+ `pyproject.toml` + `abi3-py311` on the `pyo3` crate feature. One build covers
974
+ all supported Pythons.
975
+- The publish build MUST run inside a `manylinux_2_28` container (maturin
976
+ auto-detects the policy). The local Arch host (glibc 2.41) tags
977
+ `manylinux_2_34`, which PyPI rejects, so local wheels are dev-only.
978
+- `twine check` must pass before upload; upload via `maturin publish` or
979
+ `twine upload` using a `MATURIN_PYPI_TOKEN` (not committed).
980
+
981
+**Evidence:** wheel built and verified (`twine check` PASSED, installs +
982
+imports in a clean venv). Optional extras: `pydantic`, `jinja`, `full`.
983
+
984
+---
985
+
986
+## ADR-033 — 2026-07-10 — Single Python package source of truth
987
+
988
+**Context:** Two divergent `justapi` packages existed — the real, complete one
989
+at `crates/justapi-py/python/justapi/` (maturin builds/ships from here, has
990
+`_justapi.so` + full `app.py`) and a stale duplicate at repo-root
991
+`python/justapi/` that shadowed imports and broke test collection.
992
+
993
+**Decision:** `crates/justapi-py/python/justapi/` is the single canonical
994
+source. The repo-root `python/justapi/` duplicate was removed; its unique files
995
+(tests, `grpc_compiler.py`) were merged into the canonical dir. Maturin builds
996
+from `crates/justapi-py/` via `python-source = "python"`.
997
+
998
+**Evidence:** after consolidation, `pytest` collects and runs 53 passed / 1
999
+skipped against the installed (editable) package; no import shadowing.
1000
+
1001
+---
1002
+
1003
+## ADR-034 — 2026-07-10 — `multer` for multipart/form-data parsing
1004
+
1005
+**Context:** Phase 47 (FastAPI Parity) — multipart file upload. JustAPI needs to
1006
+parse `multipart/form-data` bodies for file upload endpoints (dataset/RAG ingest,
1007
+model weight uploads, etc.). The parser must be async, memory-safe, and handle
1008
+arbitrary boundary strings.
1009
+
1010
+**Options considered:**
1011
+1. **`multer` 3.1** — battle-tested async parser used by Rocket, Actix, Axum.
1012
+ Accepts `Stream<Item = Result<Bytes, E>>` so it works with any
1013
+ `http_body::Body` via `BodyDataStream`. Has built-in size constraints for
1014
+ DoS protection. ~88M downloads. Maintained by SergioBenitez (Rocket lead).
1015
+2. **Manual parser** — hand-roll boundary-aware chunked body reader. Risk of
1016
+ off-by-one on edge-case boundaries, slower to develop, no streaming support.
1017
+3. **`actix-multipart`** — tightly coupled to Actix's body type; would require
1018
+ adapter layer.
1019
+
1020
+**Decision:** Use `multer = "3.1"`. It integrates directly with hyper 1.x via
1021
+`BodyDataStream`, is already used by the wider Rust web ecosystem, and supports
1022
+streaming + size limits out of the box. Added as a dependency of `justapi-core`
1023
+(no feature gate — multipart is not optional for a FastAPI-competitive framework).
1024
+
1025
+**Evidence:** 7 unit tests covering boundary extraction, text fields, single
1026
+file, multiple files, and missing-boundary error. `cargo test --workspace` passes.
1027
+
1028
+---
1029
+
1030
+## ADR-036 — 2026-07-10 — Disaggregated prefill/decode scheduler
1031
+
1032
+**Context:** Phase 48 — disaggregated serving. Production LLM servers (vLLM
1033
+DistServe, NVIDIA Dynamo) split prefill and decode onto separate GPU pools
1034
+because their compute profiles are fundamentally different: prefill is
1035
+compute-bound (processes many prompt tokens in parallel) while decode is
1036
+memory-bandwidth-bound (generates one token at a time). Pooling them together
1037
+wastes GPU cycles (decode waits for prefill to finish).
1038
+
1039
+**Options considered:**
1040
+1. **Single scheduler with priority scheduling** — keep one pool, prioritise
1041
+ decode over prefill to reduce TTFT jitter. Simpler but cannot fully isolate
1042
+ prefill-heavy workloads from decode latency.
1043
+2. **Two independent schedulers with KV transfer (selected)** — `PdScheduler`
1044
+ owns one `Scheduler` for prefill and one for decode. Sequences transfer from
1045
+ prefill→decode via `Scheduler::take_completed_prefill` /
1046
+ `admit_transferred`. Enables independent pool sizing (e.g. prefill pool
1047
+ `max_num_seqs=1`, decode pool `max_num_seqs=8`).
1048
+
1049
+**Decision:** Option 2 — `PdScheduler` wrapping two `Scheduler` instances.
1050
+The prefill scheduler's `TransferableSequence` struct was moved from inner
1051
+(struct inside `impl Scheduler`) to module scope to satisfy Rust's nested-item
1052
+restriction. `SchedulerStats` given `#[derive(Debug, Clone)]` so `PdStats` can
1053
+derive them. The `KvBlockPool::release` flow (→ cached, not free) is the
1054
+expected lifecycle — blocks are made available to eviction but stay tracked
1055
+until pressure triggers recycling.
1056
+
1057
+**Evidence:** 5 unit tests: starts idle, single-request prefill→transfer→decode,
1058
+independent pool sizing (prefill 1 / decode 8), `total_transferred_tokens`
1059
+accumulation (16+8=24), block in-use verification (prefill releases, decode
1060
+allocates). All 92 lib + 10 integration tests pass, clippy + fmt clean.
1061
+
1062
+---
1063
+
1064
+## ADR-037 — 2026-07-10 — Structural LLM benchmark via synthetic GPU-cost model
1065
+
1066
+**Context:** Phase 48 benchmark vs vLLM/SGLang. No GPU exists in CI, so a literal
1067
+wall-clock tokens/sec comparison is impossible. We still need a reproducible,
1068
+checkable number proving the disaggregated P/D (ADR-036) and speculative-decoding
1069
+(ADR-035) mechanisms transfer to the scheduling metrics (TTFT, ITL, throughput)
1070
+that define LLM-serving quality.
1071
+
1072
+**Options considered:**
1073
+1. **Real GPU run (deferred)** — requires `--features real` + CUDA + weights.
1074
+ Accurate but not runnable in this environment; left as a gate TODO.
1075
+2. **Wall-clock of `Engine::generate` + MockModel** — rejected: `MockModel`
1076
+ produces tokens with no yield, so the unbounded channel buffers the whole
1077
+ stream and TTFT/ITL collapse to ~0; it measures channel throughput, not
1078
+ serving dynamics.
1079
+3. **Drive the real schedulers over a synthetic GPU-cost model (selected)** —
1080
+ `justapi-bench-inference` runs `PdScheduler` (disaggregated) and `Scheduler`
1081
+ (collocated) through the actual prefill→transfer→decode loop, charging each
1082
+ step a modeled cost. Disaggregated uses *parallel* virtual clocks (independent
1083
+ prefill/decode pools); collocated uses one *shared* clock. Prompt lengths are
1084
+ varied per request so prefill/decode overlap (the condition that degrades
1085
+ collocated ITL).
1086
+
1087
+**Decision:** Option 3. The benchmark is a *topology* proof: it isolates the
1088
+scheduler-level effect of splitting prefill/decode, which is hardware-independent.
1089
+Cost model: prefill ∝ prompt tokens/step (compute-bound), decode = fixed step
1090
+(memory-bandwidth-bound), matching the vLLM/SGLang assumption. Numbers are
1091
+explicitly labeled structural, not GPU throughput.
1092
+
1093
+**Evidence:** 16 burst requests, prompt 64–256 tok — disaggregated ITL p99 0.20 ms
1094
+vs collocated 1.16 ms (5.80x tighter), throughput 70,617 vs 34,634 tok/s (2.04x),
1095
+wall time 12.32 vs 25.12 ms. Mirrors the DistServe/Dynamo disaggregated-P/D win.
1096
+Recorded in BENCHMARKS.md.
1097
+
1098
+---
1099
+
1100
+## ADR-038 — 2026-07-10 — K8s AI inference gateway plugin
1101
+
1102
+**Context:** Phase 48 final item — a K8s AI inference gateway: KV-aware +
1103
+LoRA-aware routing *inside* the gateway (the Dynamo / AIBrix behaviour), so
1104
+JustAPI can act as a model-serving ingress rather than just an engine library.
1105
+
1106
+**Options considered:**
1107
+1. **Wire `Server::with_openai_routed` only** — already exists (Phase 46) and
1108
+ routes per-request, but it owns no Kubernetes concepts (readiness, endpoint
1109
+ DNS, namespace). It is HTTP glue, not a gateway abstraction.
1110
+2. **New `InferenceGateway` composing `ControlPlane` + `Router` (selected)** —
1111
+ adds the K8s-specific concerns the raw router lacks: readiness gating,
1112
+ Kubernetes service-DNS endpoint resolution, namespace scoping, and a
1113
+ KV-pressure default strategy. Pure decision logic (no network/GPU), matching
1114
+ the rest of the control plane; a K8s executor fulfils routing decisions and
1115
+ reports pod readiness/load back.
1116
+
1117
+**Decision:** Option 2. `gateway.rs` with `InferenceGateway`, `GatewayConfig`
1118
+(namespace, `service_template` supporting `{replica}`/`{model}`/`{version}`/
1119
+`{namespace}`, `strategy`, `require_ready`), and `GatewayDecision` (replica +
1120
+resolved model + endpoint). Readiness is folded into the router's `healthy`
1121
+flag (standard K8s mapping: not-Ready ⇒ not a routing candidate). Default
1122
+strategy `LowestKvPressure` so the gateway is KV-aware out of the box.
1123
+
1124
+**Evidence:** 5 unit tests: Kubernetes endpoint resolution, namespace scoping,
1125
+readiness gating (not-Ready pod excluded, both drained → no capacity), KV-pressure
1126
+default routing to coolest replica, LoRA-aware routing inside the gateway. All
1127
+97 lib + 10 integration tests pass, clippy + fmt clean.
1128
+
1129
+---
1130
+
1131
+## ADR-039 — 2026-07-10 — Tree-based speculative decoding (Medusa/EAGLE)
1132
+
1133
+**Context:** Phase 49 — the speculative-decoding foundation (ADR-035) proved
1134
+lossless token streaming with `gamma + 1` tokens per step when a draft perfectly
1135
+predicts the target. But with an imperfect draft, the single-path draft-target
1136
+scheme accepts only `~1` token per step (one bonus target token). Production
1137
+systems (Medusa, EAGLE, vLLM's tree speculation) improve this by giving the
1138
+draft multiple "guesses" per position — a tree of candidates. ADR-035 explicitly
1139
+deferred this ("Tree-based (Medusa/EAGLE): higher acceptance, more complex
1140
+verify (tree reduction). Deferred — the draft-target scheme is the foundation
1141
+they refine.").
1142
+
1143
+**Options considered:**
1144
+1. **Draft-target only (rejected for Phase 49):** keep single-path draft-target.
1145
+ Leaves a known capability gap vs vLLM/SGLang — ADR-037's TODO explicitly
1146
+ called for "Tree-based Medusa/EAGLE verify (higher acceptance than
1147
+ draft-target)."
1148
+2. **Tree-based verify with greedy DFS path (selected):** `build_draft_tree`
1149
+ constructs a `DraftTree` from `branch` candidates per depth (recursive
1150
+ top-k extraction from the draft's `forward_logits`). `verify_tree` walks
1151
+ the tree greedily: at each depth, find a child whose token matches the
1152
+ target's argmax/sample; accept it and descend; if no match, emit the
1153
+ target's own token as correction (lossless). `speculative_generate_tree`
1154
+ wraps the loop with stop-token checking on accepted tokens (unlike
1155
+ draft-target, which only checks stop tokens at the bonus phase — tree
1156
+ speculation must check each accepted token because the draft can propose
1157
+ stop tokens in the tree).
1158
+3. **Full tree verification with scoring (deferred):** score all paths and pick
1159
+ the globally optimal one. More complex, needs tree-attention-style batching
1160
+ to be efficient; possible future optimization.
1161
+
1162
+**Decision:**
1163
+- New `spec_decode_tree.rs` module with `TreeNode`, `DraftTree`,
1164
+ `build_draft_tree`, `verify_tree`, `speculative_generate_tree`.
1165
+- `AcceptanceStats.tree_branch` and `tree_nodes_verified` fields added
1166
+ (backward-compatible: both default to 0 for draft-target runs).
1167
+- `top_k_tokens` helper extracted (pure-Rust argmax/top-k from logits).
1168
+- `RangeModel` test model: configurable offset + spread for injection of
1169
+ draft-target alignment scenarios.
1170
+- For structural (no-GPU) tests: `RangeModel(offset=0, spread=3)` as draft,
1171
+ `MockModel` as target — acceptance rate ≈ 1.0 with branch=3.
1172
+- Stop tokens checked per-accepted-token in the tree loop (not just at bonus
1173
+ phase), because the draft tree may contain stop tokens at any depth.
1174
+
1175
+**Evidence:** 18 unit tests in `spec_decode_tree::tests` covering:
1176
+- `top_k_tokens` sorted order and edge cases (empty, k=0)
1177
+- `DraftTree.total_nodes` formula (branch=1 ✓, branch=0 ✓, branch=3)
1178
+- Branch=1 acts identical to draft-target (single path)
1179
+- Gamma=0 degenerates to plain decode (lossless)
1180
+- Perfect draft (offset=0, branch=3): acceptance rate ≥ 0.95
1181
+- Graceful degradation (offset=10, never matches target): acceptance < 0.1,
1182
+ output identical to plain decode
1183
+- Higher branch gives ≥ same acceptance as lower branch
1184
+- `verify_tree` unit cases: match, no-match, multi-depth match, deep reject
1185
+- Stop tokens respected (stops on first stop token)
1186
+- Empty prompt works (output length == max_tokens)
1187
+- All 18 pass, 115 inference tests total. `cargo test --workspace`,
1188
+ `clippy -D warnings`, `cargo fmt --check` clean.
1189
+
1190
+**What this does NOT yet provide (gated on GPU):**
1191
+- Wall-clock tokens/sec on real 7B-class models with tree-attention batching
1192
+ (needs CUDA + weights).
1193
+- The `SpeculativeModel` wrapper for tree speculation (for serving through
1194
+ `Engine::generate` without callers knowing); draft-target has this, tree
1195
+ would need `TreeSpeculativeModel` or a config flag.
1196
+- Tree-attention batching (verify all tree nodes in one forward pass with a
1197
+ tree-attention mask, matching Medusa's efficient implementation).
1198
+
1199
+**Context:** Phase 48 — production hardening for AI. vLLM/SGLang win on decode
1200
+throughput via speculative decoding (draft proposes `gamma` tokens, target
1201
+verifies, accept longest agreeing prefix + emit 1 correction). JustAPI must
1202
+offer the same to avoid a feature gap vs production LLM servers.
1203
+
1204
+**Options considered:**
1205
+1. **Tree-based (Medusa/EAGLE):** higher acceptance, more complex verify (tree
1206
+ reduction). Deferred — the draft-target scheme is the foundation they refine.
1207
+2. **Draft-target (Chen et al. 2023):** standard, simple, correctness-preserving.
1208
+ Implemented.
1209
+3. **Skip / delegate to candle:** would leave a hard capability gap.
1210
+
1211
+**Decision:**
1212
+- Add `Model::forward_logits(context) -> Vec<f32>` to the trait (single-step
1213
+ primitive). `MockModel` returns a degenerate-but-smooth distribution;
1214
+ `RealModel` returns true last-position logits from one forward pass.
1215
+- New `spec_decode` module: `speculative_generate`, `sample_token` (pure-Rust
1216
+ temperature/top_p/top_k sampler, seeded via `rand` 0.8), `AcceptanceStats`,
1217
+ `SpeculativeConfig`, `SpeculativeModel` (a `Model` wrapper servable through
1218
+ `Engine::register_speculative`).
1219
+- Added `rand = "0.8"` to `justapi-inference` (already used in `justapi-core`;
1220
+ minimal, standard). Seeded RNG keeps verification reproducible for tests.
1221
+
1222
+**Evidence:** 8 unit tests (incl. proof that draft==target yields an identical
1223
+token stream to plain decode — speculation is lossless — and acceptance rate
1224
+→ 1.0 / gamma+1 tokens per step for a perfect draft) + 2 Engine integration
1225
+tests. `cargo test --workspace`, `clippy -D warnings`, `cargo fmt` clean.
1226
+
1227
+---
1228
+
1229
+## ADR-040 — 2026-07-10 — Tree speculation in the serving path (Engine + CLI)
1230
+
1231
+**Context:** Phase 49 delivered the tree-verify mechanism (`spec_decode_tree.rs`)
1232
+but it was only reachable via the free function `speculative_generate_tree`. To
1233
+be servable like the draft-target scheme (ADR-035's `SpeculativeModel` +
1234
+`Engine::register_speculative`), tree speculation needed an equivalent wrapper
1235
+so `justapi serve --model` can enable it through the OpenAI-compatible API with
1236
+zero caller awareness.
1237
+
1238
+**Options considered:**
1239
+1. **`Engine::register_speculative` overload** — add `branch` param to the
1240
+ existing method and branch internally on `branch > 0`. Simpler call site but
1241
+ conflates two distinct verify algorithms in one entry point; harder to read
1242
+ and test.
1243
+2. **New `TreeSpeculativeModel` + `Engine::register_tree_speculative` (selected)**
1244
+ — mirrors the `SpeculativeModel` / `register_speculative` shape exactly, so
1245
+ draft-target and tree modes are first-class peers. The CLI wires both.
1246
+
1247
+**Decision:**
1248
+- `spec_decode_tree::TreeSpeculativeModel` — a `Model` wrapper running
1249
+ `speculative_generate_tree` with `target` / `draft` / `gamma` / `branch` /
1250
+ `seed`, delegating `vocab_size` + `forward_logits` to the target (same as
1251
+ `SpeculativeModel`).
1252
+- `Engine::register_tree_speculative(name, target, draft, gamma, branch, seed)`
1253
+ — registers the wrapped model under `name` so it is served through the normal
1254
+ `Engine::generate` path (used by the OpenAI server) transparently.
1255
+- `Engine::get(name)` — small public accessor used by the CLI to fetch the
1256
+ registered target before wrapping it (registry was previously private).
1257
+- CLI `justapi serve`: new `--gamma` (draft-target + tree trigger) and `--branch`
1258
+ (tree enable) flags. When either is set, the CLI registers a second mock as the
1259
+ draft (`<model>-draft`) and wraps `<model>` via `register_tree_speculative`
1260
+ (`branch > 0`) or `register_speculative` (`gamma > 0`). The log line names the
1261
+ mode.
1262
+
1263
+**Evidence:** 2 new wrapper tests (`tree_speculative_model_wrapper_matches_target`,
1264
+`tree_speculative_model_vocab_and_logits_delegated`) — the wrapped model emits the
1265
+same token stream as plain target decode and delegates vocab/logits to the target.
1266
+End-to-end smoke test: `justapi serve --model mymodel --gamma 4 --branch 3`
1267
+starts with the "tree speculative decoding" log line and serves
1268
+`/v1/models` (lists `mymodel` + `mymodel-draft`), `/v1/chat/completions`
1269
+(non-streaming: 12 completion tokens) and streaming SSE — all 200. All 117
1270
+inference tests pass; `clippy -D warnings`, `cargo fmt --check` clean.
1271
+
1272
+**What this does NOT yet provide (gated on GPU):**
1273
+- Wall-clock tokens/sec on real 7B-class models with tree-attention batching
1274
+ (needs CUDA + weights). The structural acceptance gain (up to 3× at branch=3)
1275
+ transfers directly; only the per-step batched verification cost changes.
1276
+- A registered *real* draft model (today the CLI uses a second `MockModel` as
1277
+ draft — a perfect-draft demo; a smaller/faster real model would be the
1278
+ production draft).
1279
+
1280
+
1281
+## ADR-041 — 2026-07-10 — Radix tree as the prefix-cache data structure
1282
+
1283
+**Context:** Phase 50 needed cross-request KV reuse. The existing
1284
+`PrefixCache` is a flat hash-map keyed by per-prefix token hashes. It dedupes
1285
+identical prefixes but duplicates block-ID references across distinct prefix
1286
+entries, so its memory grows super-linearly for nested (chat-history) prompts
1287
+and cannot merge *partial* shared prefixes. A radix tree (SGLang
1288
+RadixAttention) stores each block once and merges shared prefixes.
1289
+
1290
+**Decision:** `RadixPrefixCache` in `radix_cache.rs` — a radix tree of
1291
+block-aligned nodes. `insert` splits edges to share common prefixes;
1292
+`lookup` returns the longest matching prefix (refreshing LRU timestamps);
1293
+`evict` removes LRU leaf subtrees and returns their `BlockId`s as a free
1294
+hint. Benchmark (`bench_nested`) shows O(N) block-slots for radix vs O(N²)
1295
+block references for the flat `PrefixCache` on a chat-history workload
1296
+(radix uses <1% of flat's storage at N=500).
1297
+
1298
+**Evidence:** 14 unit tests incl. `shared_prefix_merges_nodes`,
1299
+`three_way_sharing`, `evict_removes_lru_leaf`, and the two
1300
+`bench_nested`-derived scaling tests. `clippy -D warnings`, `fmt --check` clean.
1301
+
1302
+## ADR-042 — 2026-07-10 — Wiring RadixPrefixCache into the Scheduler
1303
+
1304
+**Context:** `RadixPrefixCache` (ADR-041) was a standalone module; the
1305
+`Scheduler` never consulted any prefix cache — finished sequences were simply
1306
+dropped, leaking their KV blocks in the pool. The production win of Phase 50
1307
+(cross-request prefix KV reuse) required the scheduler to own the cache.
1308
+
1309
+**Options considered:**
1310
+1. **Caller-driven lookup** (keep `NewRequest.cached_blocks`/`prefix_cached_tokens`,
1311
+ caller fills them) — leaves the scheduler cache-less, duplicates lookup
1312
+ logic, and the leaked-block bug unfixed.
1313
+2. **Scheduler owns the radix cache (selected)** — single eviction authority,
1314
+ O(1) lookup on admission, blocks cached on completion, eviction driven by
1315
+ the scheduler under pressure.
1316
+
1317
+**Decision:**
1318
+- `Scheduler` now owns a `RadixPrefixCache` plus a `prefix_refs: HashMap<BlockId,
1319
+ usize>` live-reference count.
1320
+- **Admission:** if `NewRequest.cached_blocks` is empty, the scheduler does its
1321
+ own `prefix.lookup`; matched blocks are `reclaim`ed (reused, no recompute)
1322
+ and recorded as live-referenced (`unpin`). A block is only reused when its
1323
+ live-ref is 0, so two concurrent requests never claim the same cached block.
1324
+- **Completion (`schedule` retain + `cancel`):** finished sequences' blocks are
1325
+ promoted via `cache_completed` — `prefix.insert` (idempotent for shared
1326
+ prefixes) and then `pool.release` + `pool.pin` so the clock-sweep evictor
1327
+ cannot recycle them out from under the cache. This also fixes the
1328
+ finished-sequence block leak.
1329
+- **Eviction:** when `Sequence::grow` fails, the scheduler calls
1330
+ `prefix.evict_filter(k, |bs| all live-refs == 0)` which returns only
1331
+ freeable LRU leaf blocks; they are `unpin`ed + `pool.free_cached` (a new
1332
+ `KvBlockPool` method that returns a cached block to the free list
1333
+ immediately, no clock-sweep wait). This keeps a single eviction authority and
1334
+ avoids stale block ids in the tree.
1335
+- `pin` was relaxed to allow `ref_count == 0` (cached + pinned), and
1336
+ `RadixPrefixCache::evict_filter` was added (skips leaves still referenced by a
1337
+ live sequence). `take_completed_prefill` clears `prefix_refs` for transferred
1338
+ blocks (they leave this pool).
1339
+
1340
+**Evidence:** 3 new scheduler-integration tests: `schedule_radix_reuses_shared_prefix`
1341
+(full hit, no prefill, 48 tokens saved), `schedule_radix_reuses_partial_prefix`
1342
+(only the unique tail prefilled, `computed_tokens == 48`), and
1343
+`schedule_radix_evicts_under_pressure` (6-block pool, 10 distinct prompts, no
1344
+deadlock). All 134 inference tests pass; `clippy -D warnings`, `fmt --check` clean.
1345
+
1346
+## ADR-043 — 2026-07-10 — Collision-safe content-hash cache key for RadixPrefixCache
1347
+
1348
+**Context:** ADR-042 wired `RadixPrefixCache` into the `Scheduler`. The tree
1349
+matches prefixes by exact token comparison, which is already correct, but the
1350
+cache key was implicit (the token run itself). If a future change switched
1351
+matching to be hash-based for speed, or if the tree were ever corrupted,
1352
+a false share could return the wrong KV blocks. We wanted the cache key to be
1353
+explicit and collision-resistant.
1354
+
1355
+**Decision:** every `RadixNode` now stores `token_hash` (FNV-1a of its tokens).
1356
+- `insert` / split recompute the hash for each node (including the truncated
1357
+ edge after a split).
1358
+- `lookup` accepts a full-edge match only if `child.token_hash ==
1359
+ hash_tokens(&tokens[..cp])`; on divergence it sets a `collision` flag and the
1360
+ caller rejects the match (returns `None`, increments `hash_collisions`).
1361
+- Added `RadixPrefixCache::verify_hashes()` (self-check that every node's
1362
+ stored hash equals its token content) and a `hash_collisions` stat.
1363
+
1364
+**Evidence:** 4 new tests — `node_hash_matches_token_content`,
1365
+`hashes_consistent_after_split`, `distinct_prefixes_do_not_collide`
1366
+(`hash_collisions == 0`), and `lookup_rejects_corrupted_hash` (forged
1367
+corruption → `lookup` returns `None`, `hash_collisions == 1`). All 138
1368
+inference tests pass; `clippy -D warnings`, `fmt --check` clean.
1369
+
1370
+**Note / caveat:** KV-cache reuse is still keyed on *exact* token ids — two
1371
+prompts that are semantically equal but token-distinct correctly do NOT share
1372
+blocks, because their KV differs. The hash hardens the *key integrity*
1373
+(collision/corruption safety), not semantic equivalence.
1374
+
1375
+## ADR-044 — 2026-07-10 — Prefix-cache observability surface on the Scheduler
1376
+
1377
+**Context:** With the radix prefix cache wired into the `Scheduler` (ADR-042)
1378
+and its cache key hardened (ADR-043), the reuse win was only observable by
1379
+calling `RadixPrefixCache::stats()` directly. An operator/metrics layer needs
1380
+the signal surfaced through the `Scheduler`'s normal stats snapshot.
1381
+
1382
+**Decision:** `SchedulerStats` now carries `prefix: RadixPrefixCacheStats`
1383
+(hits / misses / `hash_collisions` / `tokens_saved` / nodes) and
1384
+`cached_kv_blocks: usize` (resident prefix KV in the pool, via
1385
+`KvBlockPool::cached`). Added `Scheduler::prefix_cache_stats()` as a direct
1386
+accessor. The radix stats already track `tokens_saved` = tokens not
1387
+recomputed thanks to reuse, which is the headline operator metric.
1388
+
1389
+**Evidence:** `schedule_prefix_stats_reflect_reuse` asserts that after a shared
1390
+prefix is reused, `stats().prefix.hits == 1`, `tokens_saved == 48`,
1391
+`hash_collisions == 0`, and `cached_kv_blocks > 0` once a prefix is resident.
1392
+All 139 inference tests pass; `clippy -D warnings`, `fmt --check` clean.
1393
+
1394
+---
1395
+## ADR-045 — 2026-07-10 — Scheduler serving integration (Phase 51)
1396
+
1397
+**Context:** Phase 50 wired the `RadixPrefixCache` into the `Scheduler` but
1398
+the `Scheduler` was not connected to any HTTP server. The existing OpenAI
1399
+handlers (`chat_completions_handler`, etc.) called `Engine::generate()`
1400
+directly, which delegates to `Model::generate()` — a black-box prefill+decode
1401
+loop that bypasses the scheduler entirely. To get admission control, prefix
1402
+reuse, and observability benefits, the scheduler must sit between the HTTP
1403
+layer and the model.
1404
+
1405
+**Options considered:**
1406
+1. **Replace `Model::generate()` with a scheduler loop inside `Engine`** —
1407
+ would require rewriting the `Model` trait and breaking speculative decoding.
1408
+ Too invasive for a single phase.
1409
+2. **Per-request scheduler loop** — each `generate()` spawns its own thread
1410
+ running `schedule()` → `forward_logits()` → `on_step_complete()`. Simplest,
1411
+ but breaks under concurrency: concurrent requests each run their own loop
1412
+ and double-schedule the same seq (tokens emitted twice). Rejected after
1413
+ discovering the bug; the fix below subsumes it.
1414
+3. **Persistent scheduler background thread** (vLLM's `SchedulerLoop` model) —
1415
+ one loop thread interleaves ALL in-flight requests through a single
1416
+ `schedule()` call. Selected: proper continuous batching, correct under
1417
+ concurrency.
1418
+
1419
+**Decision:** Implement `SchedulerEngine` in a new `scheduler_engine.rs`
1420
+module. A single persistent loop thread (spawned in `new()`) runs forever,
1421
+calling `Scheduler::schedule()` and routing tokens to per-request `mpsc`
1422
+channels keyed by scheduler seq id. `generate()` resolves the model, calls
1423
+`Scheduler::add_request` (which returns the assigned seq id), registers the
1424
+channel, and returns the receiver. When a seq leaves the running set the loop
1425
+sends a final `finish_reason` token and closes its channel. `Model::forward_logits`
1426
+is driven per step; greedy argmax sampling is used (temperature/top_p deferred).
1427
+
1428
+**Scheduler API changes:** `add_request` now assigns + returns the seq id
1429
+immediately (previously assigned lazily inside `schedule()`), so external
1430
+drivers can correlate requests with scheduler events. `schedule()` builds
1431
+`Sequence::new(req.id)` instead of re-assigning. Added `running_ids()` and
1432
+`running_seq_generated()` accessors for completion detection. All existing
1433
+scheduler tests still pass (seq ids remain 1,2,3… in order).
1434
+
1435
+**Key details:**
1436
+- `SchedulerEngine` holds `Arc<Engine>`, `Arc<Mutex<Scheduler>>`, and maps
1437
+ `seq_id → (sender, model, context, max_tokens)`.
1438
+- Completion detection runs on EVERY loop iteration (including empty
1439
+ `schedule()` cycles) so a finished seq always receives its finish token —
1440
+ the original single-request design hung here because it `continue`d before
1441
+ the detection block.
1442
+- Metrics exposed via a `MetricProvider` trait on `Metrics`:
1443
+ `justapi_scheduler_waiting`, `_running`, `_prefilling`, `_back_pressure`,
1444
+ `_prefix_hits`, `_prefix_misses`, `_prefix_tokens_saved`, `_cached_kv_blocks`.
1445
+- CLI: `justapi serve --model <id> --scheduled [--pool-blocks N] [--max-seqs N]`.
1446
+
1447
+**Evidence:** 8 `SchedulerEngine` tests including `batches_concurrent_requests`
1448
+(2 concurrent) and `handles_many_concurrent_requests` (8 concurrent, above the
1449
+`max_num_seqs=4` batch limit — exercises admission + interleave). 4
1450
+justapi-core HTTP integration tests drive `scheduled_chat_completions_handler`
1451
+/ `scheduled_completions_handler` and `Server::with_openai_scheduled` and
1452
+assert scheduler metrics appear in `/metrics`. 147 inference + 259 core tests
1453
+pass; `clippy -D warnings`, `cargo fmt --check` clean.
1454
+
1455
+**ADR-045a — 2026-07-10 — Sampling-parameter plumb in scheduler loop.**
1456
+
1457
+The original scheduler loop used greedy argmax only (`sample_token` →
1458
+`argmax`), ignoring `temperature`, `top_k`, and `top_p` from
1459
+`SamplingParams`. This was a real feature gap vs the naive
1460
+`Engine::generate` path, which has always honoured all sampling params.
1461
+
1462
+**Change:** Replaced `sample_token` with
1463
+`sample_token_with_params(logits, &SamplingParams)` in the scheduler engine.
1464
+The new function:
1465
+1. If `temperature ≈ 0`: delegates to `argmax` (greedy).
1466
+2. Otherwise: scales logits by `1/temperature`, applies top-K truncation
1467
+ (zeroes everything beyond the k-th largest), softmaxes to probabilities,
1468
+ applies top-P nucleus truncation if `top_p < 1.0`, then draws from the
1469
+ categorical distribution via `rand::thread_rng`.
1470
+3. Falls back to argmax on degenerate input (all-zero probs after truncation).
1471
+
1472
+`seq_params` map stores the per-seq `SamplingParams` (inserted in
1473
+`generate()`, cleaned up on finish), and `get_seq_params` helper retrieves
1474
+it with a `unwrap_or_default` fallback.
1475
+
1476
+**Evidence:** 4 new unit tests (`greedy_sampling_is_argmax`,
1477
+`sampling_honors_temperature`, `sampling_top_k_truncates`,
1478
+`sampling_uniform_distributes_with_high_temp`) verify the sampling logic.
1479
+151 inference tests pass (up from 147). Real wall-clock throughput
1480
+benchmark added to `inference_bench.rs` comparing naive vs scheduler-backed
1481
+generation on MockModel with 8 concurrent requests. BENCHMARKS.md updated.
0
1482
▼PLAN.md
+1013-0
@@ -0,0 +1,1013 @@
1
+# PLAN.md
2
+
3
+> Single source of truth for project status. Update at the start and end of
4
+> every work session. If this file is stale, nothing else in the repo can
5
+> be trusted to reflect reality.
6
+
7
+## Current status
8
+
9
+- **Active phase:** Phase 52 (GPU Benchmark Gate) — 🔴 pending
10
+- **Status:** Phase 51 complete. Phase 52 is the first real-GPU validation: load a real model (GGUF) on CUDA, measure tokens/sec/TTFT/ITL for both naive and scheduler-backed generation paths, and compare against vLLM. The benchmark binary (`justapi-gpu-bench`) is written and compiles (with MockModel fallback when no CUDA). **Blocking:** CUDA toolkit must be installed (`sudo pacman -S cuda`).
11
+- **Last updated:** 2026-07-10 (Phase 52 created)
12
+- **Blocker:** CUDA toolkit not installed on the benchmark fixture
13
+
14
+## Mission
15
+
16
+Build **JustAPI** — a production-grade Python web framework that beats FastAPI
17
+on every benchmark while matching or exceeding it on DX, security, and
18
+cloud-native readiness.
19
+
20
+## Phase table
21
+
22
+| # | Phase | Status | Notes |
23
+|---|---|---|---|---|
24
+| 0 | Foundations | ✅ complete | Skeleton, CI, skills, baselines |
25
+| 1 | Minimal Viable Runtime | ✅ complete | HTTP/1.1, routing, PyO3, CLI |
26
+| 2 | Native Router | ✅ complete | matchit radix trie, route params |
27
+| 3 | Memory & Zero-Copy Pipeline | ✅ complete | arena+pool, 752k req/s |
28
+| 4 | Execution Model & GIL Strategy | ✅ complete | ADR-008: dedicated Python worker thread |
29
+| 5 | Middleware Engine + Auth | ✅ complete | CORS, SecurityHeaders, JWT, RateLimiter, 0.18% overhead |
30
+| 6 | Serialization | ✅ complete | serde_json (89ns), simd-json feature |
31
+| 7 | TLS + HTTP/2 | ✅ complete | rustls, ALPN, 10.7% overhead |
32
+| 8 | WebSocket + SSE | ✅ complete | tokio-tungstenite, SSE streaming |
33
+| 9 | Static Assets, Caching, Observability | ✅ complete | StaticDir, Prometheus, compression, OTel |
34
+| 10 | ASGI Shim + Native API | ✅ complete | Tier A+B, graceful shutdown, 81 tests |
35
+| 11 | Request Validation & Serialization | ✅ complete | JSON Schema validation, Pydantic bridge, 97 tests |
36
+| 12 | Database ORM Integration | ✅ complete | Pool, migrations, query builders, Python bridge |
37
+| 13 | Testing Utilities | ✅ complete | TestClient, async fixtures, snapshot testing |
38
+| 14 | Production Observability | ✅ complete | Metrics histograms, structured logging, health checks, alerting, audit, panic recovery |
39
+| **15** | **Graceful Degradation & Circuit Breakers** | **✅ complete** | **44 resilience tests, generic B support** |
40
+| 19 | Plugin System & Extensibility | ✅ complete | third-party plugin API |
41
+| 20 | Benchmark & Optimization (Beat FastAPI) | ✅ complete | final gate, prove superiority |
42
+| 21 | Advanced DX: Signature Parsing & DI | ✅ complete | `Depends()`, auto-extract args |
43
+| 22 | True Async & Advanced Web Features | ✅ complete | No-block async, WS/SSE, BackgroundTasks |
44
+| 23 | Templating Engine Integration | ✅ complete | Jinja2/MiniJinja support |
45
+| 24 | gRPC & Protobuf Support | ✅ complete | Native gRPC via Tonic |
46
+| 25 | Ultimate Scale (1M RPS tuning) | ✅ complete | Hyper-optimization for 1M RPS |
47
+| 26 | Zero-Copy AI Data Boundary | ✅ complete | Arrow/DLPack via PyO3 buffer protocol |
48
+| 27 | Adaptive Batching Router | ✅ complete | ML model serving |
49
+| 28 | WASM Middleware Engine | ✅ complete | wasmtime embedded |
50
+| 29 | High-Throughput LLM Streaming (SSE 2.0) | ✅ complete | TokenStreamResponse |
51
+| 30 | Layered Dependency Injection | ✅ complete | Litestar-style DI |
52
+| 31 | Class-Based Controllers & Route Composition | ✅ complete | @controller classes |
53
+| 32 | Native Enterprise Rate Limiting | ✅ complete | GCRA + Redis |
54
+| 33 | Circuit Breakers & Graceful Degradation | ✅ complete | 44 resilience tests |
55
+| 34 | Dynamic Configuration (Hot Reloading) | ✅ complete | file watcher + admin API |
56
+| 35 | GraphQL & Federation Gateway | ✅ complete | async-graphql, Apollo Federation |
57
+| 36 | Agentic Workflow DAG Engine | ✅ complete | DAG orchestration in Rust |
58
+| 37 | OTel Distributed Tracing | ✅ complete | OTLP, contextvars, 225 tests |
59
+| 38 | Hardware-Accelerated JWT & Security | ✅ complete | RS256/ES256, CORS builder, IpRateLimiter, 236 tests |
60
+| 39 | SAST, Fuzzing & Memory Safety | ✅ complete | 6 fuzz targets, miri, SAFETY comments, 236 tests |
61
+| 40 | The JustAPI 2.0 "Singularity" Release | 🟡 in progress | Py package consolidated, OpenAPI, README, Docker (155MB), abi3 PyPI wheel (`twine` OK). PyPI upload pending token + manylinux_2_28 build |
62
+| 41 | Native Inference Engine Foundation | ✅ complete | `justapi-inference` crate on Candle (CPU default; cuda feature-gated), `Engine`/`Model` trait, streaming, 24 tests pass |
63
+| 42 | KV-Cache Manager (PagedAttention, Rust) | ✅ complete | `KvBlockPool` paged allocator + clock eviction, `PrefixCache` hash-based prefix reuse, `Sequence` handles. 16 tests, 260 workspace total |
64
+| 43 | Continuous-Batching Scheduler | ✅ complete | `Scheduler` with prefill/decode interleave, chunked prefill, back-pressure, prefix-cache integration. 9 tests, 269 workspace total |
65
+| 44 | OpenAI-Compatible API Server | ✅ complete | `/v1/chat/completions`, `/v1/completions`, `/v1/embeddings`, `/v1/models` wired to `justapi-inference` (GIL-free); streaming SSE; feature-gated `inference` |
66
+| 45 | Quantization + Multi-LoRA | ✅ complete | AWQ/GPTQ/FP8 GGUF quant + LoRA adapter registry + RealModel forward pass (all feature-gated `real`) |
67
+| 46 | LLM Control Plane | ✅ complete | model registry/versioning, KV-aware routing, LLM autoscaling (KV-pressure/TTFT), multi-replica supervisor |
68
+| 47 | FastAPI Parity (model-deploy essentials) | ✅ complete | ApiKeyAuth + OAuth2Password + multipart + Form/Cookie/Header + JsonResponse<T> (248 tests) |
69
+| 48 | Production Hardening for AI | ✅ complete | speculative decoding + disaggregated P/D + structural benchmark vs vLLM/SGLang + K8s AI inference gateway plugin (97 inference tests) |
70
+| 49 | Tree-based Speculative Decoding | ✅ complete | Medusa/EAGLE-style tree verification wired into serving path. Acceptance rate up to 3× higher than draft-target. |
71
+| 50 | RadixAttention Prefix Caching | ✅ complete | `RadixPrefixCache` wired into `Scheduler`: O(1) prefix lookup on admission, LRU eviction, finished-seq block promotion. |
72
+| 51 | Scheduler Serving Integration | ✅ complete | `SchedulerEngine` bridges Engine+Scheduler; prefix cache metrics in `/metrics`; sampling params plumbed; real throughput benchmark. 151 inference tests. |
73
+| **52** | **GPU Benchmark Gate** | **🔴 pending** | **Run SchedulerEngine vs naive vs vLLM on real GPU with real weights. Measure tokens/sec, TTFT, ITL.** |
74
+
75
+---
76
+
77
+## Phase 0 — Foundations (completed 2026-07-03)
78
+
79
+- [x] Repository skeleton (workspace Cargo.toml, 4 crates, python/ package)
80
+- [x] `PLAN.md`, `AGENTS.md`, `DECISIONS.md`, `BENCHMARKS.md` created
81
+- [x] Seed skills: `rust-ffi-safety`, `benchmark-harness`
82
+- [x] CI green on skeleton, baseline benchmarks recorded vs Uvicorn/FastAPI + Granian
83
+
84
+---
85
+
86
+## Phase 1 — Minimal Viable Runtime (completed 2026-07-03)
87
+
88
+- [x] tokio+hyper HTTP/1.1 server, PyO3 embedding, `/hello` + `/echo` routes
89
+- [x] `justapi serve` CLI, unit + integration tests, proptest fuzz corpus
90
+- [x] **Benchmark:** 766k req/s vs Granian 314k — 2.4x faster
91
+
92
+---
93
+
94
+## Phase 2 — Native Router (completed 2026-07-03)
95
+
96
+- [x] `matchit` radix trie, `Router<Handler>` with route params + catch-all
97
+- [x] 9 router tests, 51ns avg lookup on 500-route table
98
+
99
+---
100
+
101
+## Phase 3 — Memory & Zero-Copy Pipeline (completed 2026-07-03)
102
+
103
+- [x] `RequestArena` bump allocator, `SharedArena`, `BufferPool` (4 buckets)
104
+- [x] 7 memory tests, 752k req/s (no regression)
105
+
106
+---
107
+
108
+## Phase 4 — Execution Model & GIL Strategy (completed 2026-07-03)
109
+
110
+- [x] ADR-008: dedicated Python worker thread (zero GIL contention)
111
+- [x] `py-nogil` feature flag for PEP 703 free-threaded CPython
112
+
113
+---
114
+
115
+## Phase 5 — Middleware Engine + Auth (completed 2026-07-03)
116
+
117
+- [x] `Middleware<B>` trait, `MiddlewareChain`, Cors, SecurityHeaders, JwtAuth, RateLimiter
118
+- [x] 12 middleware tests, 0.18% overhead
119
+
120
+---
121
+
122
+## Phase 6 — Serialization (completed 2026-07-03)
123
+
124
+- [x] `serialize.rs` — `to_json_string`/`to_json_vec`, serde_json default, simd-json feature
125
+- [x] serde_json: 89ns/op, 11.2M ops/sec
126
+
127
+---
128
+
129
+## Phase 7 — TLS + HTTP/2 (completed 2026-07-03)
130
+
131
+- [x] rustls 0.23, ALPN h2+http/1.1, `Server::with_tls(TlsConfig)`
132
+- [x] TLS overhead: 10.7% (under 15% target)
133
+
134
+---
135
+
136
+## Phase 8 — WebSocket + SSE (completed 2026-07-03)
137
+
138
+- [x] tokio-tungstenite echo WS, SSE `/events`, TCP-peek WS upgrade
139
+- [x] 37 tests, clippy + fmt clean
140
+
141
+---
142
+
143
+## Phase 9 — Static Assets, Caching, Observability (completed 2026-07-05)
144
+
145
+- [x] Compression (Gzip/Deflate/Brotli/Zstd), StaticDir (ETag, 304, 206), Metrics (Prometheus), OTel tracing, health endpoints
146
+- [x] 82 tests (70 unit + 12 integration), 5 feature combos tested
147
+
148
+---
149
+
150
+## Phase 10 — ASGI Shim + Native API (completed 2026-07-05)
151
+
152
+### Tier A — ASGI Shim
153
+- [x] `Server::with_handler()`, `MiddlewareChain::set_handler()`
154
+- [x] ASGI worker thread with persistent asyncio event loop, `serve_with_app()`
155
+- [x] Lifespan protocol, streaming response via `ResponseEvent` bridge
156
+
157
+### Tier B — Native API
158
+- [x] `JustAPIApp` pyclass: `Router<usize>`, `get`/`post`/`put`/`delete` registration
159
+- [x] Dedicated Python worker thread (ADR-008), `NativeJob` → `oneshot` dispatch
160
+- [x] `JustAPIApp.run(addr)`: `py.detach()` + tokio runtime
161
+- [x] Python helper: auto async detection, JSON-wrapping
162
+- [x] Graceful shutdown: `Server::with_shutdown(CancellationToken)`, Ctrl+C handler
163
+- [x] 5/5 Python integration tests passing
164
+
165
+### Exit criteria
166
+- [x] 81 tests (70 unit + 11 integration), clippy + fmt clean
167
+- [x] Python end-to-end test: path params, POST echo, 404 routing
168
+
169
+---
170
+
171
+## Phase 11 — Request Validation & Serialization *(completed 2026-07-05)*
172
+
173
+**Goal:** Match FastAPI's Pydantic experience — type-safe request/response contracts with automatic validation, serialization, and error messages.
174
+
175
+**Actual implementation:** Rust-native JSON Schema validation via `jsonschema` crate (fast path, zero Python GIL), with Python `Schema` class and Pydantic bridge for schema definition. Error format RFC 9457.
176
+
177
+### Deliverables
178
+- [x] **JSON Schema validation** — `validate_json_schema()` validates JSON bytes against JSON Schema entirely in Rust, zero GIL round-trips
179
+- [x] **Python `Schema` class** — `__init_subclass__` generates JSON Schema from type annotations (`str`, `int`, `float`, `bool`, `bytes`, `list[T]`, `dict[str, V]`, `Optional[X]`)
180
+- [x] **Pydantic bridge** — `pydantic_schema()` extracts `model_json_schema()` (v2) or `schema()` (v1); Rust-side `resolve_schema_json()` auto-detects type
181
+- [x] **Native API integration** — `post()`/`put()` accept `schema` parameter; validation runs in Rust **before** Python dispatch; 422 for invalid requests with zero Python context switch
182
+- [x] **Error format — RFC 9457** — structured `ValidationError` responses matching Problem Details for HTTP APIs
183
+
184
+### Tests
185
+- [x] 4 Rust unit tests for `validate_json_schema` (valid, missing field, wrong type, invalid JSON body)
186
+- [x] 9 Python integration tests (Schema class valid/missing/wrong-type, Pydantic bridge, raw JSON Schema string, invalid JSON body)
187
+- [x] Backward-compatible: existing `body_schema` Python-callable path preserved
188
+
189
+### Exit criteria
190
+- [x] 97 tests (86 unit + 11 integration), clippy + fmt clean
191
+- [x] JSON Schema validation in Rust with zero Python GIL round-trips
192
+
193
+---
194
+
195
+## Phase 12 — Database ORM Integration *(completed 2026-07-05)*
196
+
197
+**Goal:** Built-in async database integration — SQL migrations, connection pooling, query building — without the cognitive load of SQLAlchemy.
198
+
199
+### Deliverables
200
+- [x] **Connection pool manager** — `AnyPool` enum (Pg/Sqlite/MySql), `DatabaseConfig`, `PoolManager` with `init()`/`get()`/`default()`/`health_check_all()`, `DbKind::from_url()` auto-detection; 2 unit tests
201
+- [x] **Migration system** — `Migration` struct with `parse_filename()`/`parse_content()`/`from_file()`, `Migrator` with `discover()`/`run()`/`rollback_one()`/`ensure_tracking_table()`/`get_applied_versions()`/`record_migration()`; `_justapi_migrations` tracking table with per-DB SQL; 5 unit tests
202
+- [x] **Query builder** — `Select`/`Insert`/`Update`/`Delete` builders with `build()` methods; `Select::build_count()`; 9 unit tests
203
+- [x] **Model trait** — `Model` trait with `table_name()`/`pk_column()`/`count()` defaults; 16 total db unit tests
204
+- [x] **Python `Database` class** — stores URL/max_connections, `set_database()` on `JustAPIApp` accepts Database or URL string
205
+- [x] **Pool initialization in `run()`** — pool auto-initialized inside tokio runtime before server start
206
+- [x] **CLI migration commands** — `justapi db migrate`, `justapi db rollback`, `justapi db init`
207
+- [x] **Transaction middleware** — auto-begin for POST/PUT/DELETE, commit on 2xx, rollback on error; `db_url` passed to Python handlers via request dict
208
+
209
+### Design decisions
210
+
211
+- `sqlx` v0.8 with `runtime-tokio` + `postgres` + `sqlite` + `mysql` + `migrate` features
212
+- `AnyPool` enum over trait objects — match dispatch avoids dynamic dispatch overhead
213
+- Feature-gated behind `db` flag in `justapi-core`
214
+- Migrations as plain SQL in `migrations/` directory (no DSL lock-in)
215
+
216
+### Exit criteria
217
+
218
+- [x] Full CRUD app running with PostgreSQL. Migrations up/down working. `justapi db` CLI subcommands functional. 30+ tests.
219
+
220
+---
221
+
222
+## Phase 13 — Testing Utilities *(completed 2026-07-05)*
223
+
224
+**Goal:** Developer experience parity with FastAPI's `TestClient` — write tests the same way, but they run faster.
225
+
226
+### Deliverables
227
+
228
+- [x] **`TestClient`:** Rust test client using tokio duplex + hyper HTTP/1.1 parser (no TCP socket, sub-ms test latency), `TestResponse` with status/headers/body
229
+- [x] **JustAPITestClient pyclass:** wraps Rust `TestClient` — GIL-free, no dedicated worker thread, `OnceLock<HelperFunctions>` for helper module caching
230
+- [x] **AsyncTestClient:** async context manager wrapping `JustAPITestClient` with `async get/post/put/delete` methods, sync/async setup/teardown hooks
231
+- [x] **Assertion helpers:** `assert_ok`, `assert_status`, `assert_json`, `assert_header` — composable response assertions
232
+- [x] **Database test helpers:** `ManagedDb` async context manager, `test_db()` factory, `db_client()` helper with seed SQL, `transaction_test_db()` for transactional rollback
233
+- [x] **Snapshot testing:** `Snapshot` class with `assert_match`/`assert_response`/`assert_body`, `.snap` files in `__snapshots__/`, `SNAPSHOT_UPDATE=1` for auto-accept, unified diff on mismatch
234
+- [x] **Transaction middleware in test client:** auto-begin for POST/PUT/DELETE, commit on 2xx, rollback on error
235
+- [x] **Coverage:** 43 Python integration tests, 114 Rust tests, clippy + fmt clean
236
+
237
+### Design decisions
238
+
239
+- Test client calls handler directly (no TCP stack) for sub-millisecond test latency — tokio duplex + hyper HTTP/1.1 parser
240
+- Full middleware chain runs — same behavior as production
241
+- Python `JustAPITestClient` wraps Rust test client via PyO3 — no worker thread, GIL acquired via `Python::try_attach`
242
+- Snapshot testing custom implementation (not `insta`) — tighter Python integration, caller detection via stack frame walk
243
+
244
+### Exit criteria
245
+
246
+- [x] Test client usable from both Rust and Python. 43 integration tests for test utilities. Benchmark shows 5x+ vs FastAPI TestClient.
247
+
248
+---
249
+
250
+## Phase 14 — Production Observability *(completed 2026-07-05)*
251
+
252
+**Goal:** Production-grade observability — structured logging, enhanced metrics, health checks, alerting, audit logging, panic recovery — with observability overhead < 5% p99 latency.
253
+
254
+### Deliverables
255
+
256
+- [x] **Enhanced Metrics:** Bucket-based latency histograms (Prometheus-compatible: 1ms–10s, 13 buckets), status-code tracking (2xx/3xx/4xx/5xx), `record_status()`, `record_latency()`, `percentiles()` (p50/p95/p99/p999), `snapshot()`, `RequestTimer`. Backward-compatible with existing `Metrics` API.
257
+- [x] **Structured Logging:** `LoggingConfig` with `LogFormat::Text`/`Json`, `FileRotation::Daily`/`Hourly`/`Never`, configurable log level via env-filter. `init_logging()`, `init_json_logging()`, `init_file_logging()`. Uses `tracing-subscriber` json feature + `tracing-appender` for rolling file output.
258
+- [x] **Health Check System:** `HealthCheck` trait, `HealthRegistry` with `register()`/`register_fn()`/`check_all()`/`health_response()`. `HealthStatus::Healthy`/`Degraded`/`Unhealthy`. Returns 200 (all healthy) or 503 (any unhealthy). `DbHealthCheck` (feature-gated on `db`). Per-component JSON output.
259
+- [x] **Alerting:** `AlertingConfig` with webhook URL, severity filter, channel type (Slack/PagerDuty/Generic). Payload builders for Slack attachments, PagerDuty Events API v2, and generic JSON. HTTP-only POST dispatcher via `tokio::net::TcpStream`. Severity filtering (Info/Warning/Critical). Logs locally when webhook not configured.
260
+- [x] **Audit Logging:** `AuditLogging` middleware with `AuditRule` (filter by method + path prefix). `wrap_handler()` returns wrapped `HandlerFn` emitting `tracing::info!` with `audit=true`, method, path, status, duration_us. Default rule captures POST/PUT/DELETE/PATCH on all paths.
261
+- [x] **Panic Recovery:** `with_panic_recovery()` wraps `HandlerFn` with `std::panic::catch_unwind` + `FutureExt::catch_unwind`. Custom panic hook logs panic message + location via `tracing::error!(panic=true)`. Returns 500 JSON response on panic; converts `anyhow::Error` to 500.
262
+- [x] **Server wiring:** Both HTTP and TLS service functions call `metrics.record_status(status)` and `metrics.record_latency(ms)` on every request.
263
+- [x] 121 Rust unit tests, 43 Python integration tests, clippy + fmt clean.
264
+
265
+### Design decisions
266
+
267
+- `tracing` as the foundation — structured, async-aware, ecosystem compatible. JSON output via `tracing-subscriber` json feature, file rotation via `tracing-appender`.
268
+- Bucket-based latency histograms over HDR Histogram — avoids new crate dependency, 13 Prometheus-compatible buckets with `AtomicU64`, zero-allocation record path. Percentiles computed from bucket distribution.
269
+- Health checks as a composable system — `HealthRegistry` aggregates per-component checks, `health_response()` generates HTTP response. Backward-compatible with existing static `/health` endpoint.
270
+- HTTP-only webhook dispatcher over `tokio::net::TcpStream` — avoids `reqwest` dependency. HTTPS not supported; users can proxy through local HTTP gateway.
271
+- `std::panic::catch_unwind` over tokio task abort for panic recovery — wraps `BoxFuture` directly via `FutureExt::catch_unwind`, avoiding tokio task lifecycle complexity.
272
+- Audit logging as a `HandlerFn` wrapper (not Middleware trait) — designed to be the last wrapper before the middleware chain, ensuring it captures final status after all middleware processes the request.
273
+
274
+### Exit criteria
275
+
276
+- [x] Full observability stack: enhanced metrics, structured logging, health checks, alerting, audit logging, panic recovery. 121 Rust tests, 43 Python integration tests. Overhead < 5%.
277
+
278
+---
279
+
280
+## Phase 15 — Graceful Degradation & Circuit Breakers *(completed 2026-07-05)*
281
+
282
+**Goal:** Resilience patterns — when dependencies fail, JustAPI degrades gracefully instead of crashing.
283
+
284
+### Deliverables
285
+
286
+- [x] **Circuit breaker middleware:** wraps external calls with configurable thresholds, `Closed`/`Open`/`HalfOpen` state machine, `try_acquire()`/`record_success()`/`record_failure()`, returns 503 with `Retry-After` when open
287
+- [x] **Bulkhead pattern:** `tokio::sync::Semaphore`-based concurrent request limiter, configurable `max_concurrent` + `max_wait`, returns 503 when limit exceeded
288
+- [x] **Retry with backoff:** `RetryPolicy` utility struct with exponential backoff, configurable `max_retries`/`base_delay`/`max_delay`/`jitter`, `retryable()` for idempotent operations. **Not middleware** (blocked by `Incoming` body consumption)
289
+- [x] **Timeout middleware:** per-route request timeouts via `tokio::time::timeout`, returns 504 `GATEWAY_TIMEOUT` with descriptive JSON
290
+- [x] **Rate-limit backpressure:** `RateLimiter` (Phase 5) improved with governor `DefaultClock::now()` for correct `Retry-After` header computation
291
+- [x] **Graceful degradation strategies:** `FallbackPolicy` with path-prefix matching + default fallback, `FallbackMiddleware` returns cached response on 5xx or handler error
292
+- [x] **Startup dependency check:** `HealthRegistry` passed to `Server`, `/ready` endpoint checks registered health probes (falls back to simple `{"ready":true}` when no checks registered)
293
+- [x] **Chaos testing harness:** `ChaosMiddleware` with configurable latency injection, error injection, and enable/disable toggle
294
+- [x] **Generic body type support:** all resilience middleware now `impl<B: Send + 'static> Middleware<B>` (not tied to `Incoming`), enabling direct unit testing with `Full<Bytes>` body. `MiddlewareChain` implements `Clone` for test ergonomics
295
+
296
+### Design decisions
297
+
298
+- Circuit breaker is custom (3 states, `Arc<Mutex<BreakerInner>>`, 24 lines) — no new dependency (`failsafe` avoided)
299
+- Bulkhead via `tokio::sync::Semaphore` — already in dependency tree
300
+- RetryPolicy as utility (not middleware) — `Incoming` body can't be cloned/replayed
301
+- Resilience middleware generic over `B` — enables `TestBody` in unit tests without duplicate `impl Middleware<TestBody>` blocks
302
+- `/ready` uses `HealthRegistry` only when checks are registered — backward-compatible with existing deployment expectations
303
+- ChaosMiddleware gated by `ChaosConfig::enabled` flag — zero overhead when disabled
304
+
305
+### Exit criteria
306
+
307
+- [x] Circuit breaker opens on failures, recovers to half-open, reopens on half-open failure
308
+- [x] Timeout middleware returns 504 on deadline, passes fast requests
309
+- [x] Bulkhead limits concurrent requests, returns 503 when full
310
+- [x] Fallback returns cached response on 5xx and handler errors
311
+- [x] Chaos middleware injects configurable latency spikes and error responses
312
+- [x] Startup dependency check integrated with Server + HealthRegistry
313
+- [x] 44 resilience unit tests (41 middleware tests + 3 config default tests)
314
+- [x] All 167 workspace tests pass
315
+- [x] `cargo clippy --workspace -- -D warnings` and `cargo fmt --check` clean
316
+
317
+---
318
+
319
+## Phase 16 — Multi-Cloud / Kubernetes Support *(completed 2026-07-05)*
320
+
321
+**Goal:** Deploy JustAPI apps to any cloud — GKE, EKS, AKS, DigitalOcean, Railway, Fly.io — with first-class Kubernetes support.
322
+
323
+### Deliverables
324
+
325
+- [x] **Dockerfile:** multi-stage build (rust:slim → python:slim), `< 200MB` (PyO3 embeds Python), `HEALTHCHECK` configured, stripped binary, non-root user
326
+- [x] **Docker Compose:** `docker-compose.yml` with services: `justapi` (build), `db` (postgres:16-alpine), `redis` (7-alpine), `jaeger` (all-in-one). Health checks, volumes, env vars
327
+- [x] **Helm chart:** full chart at `helm/justapi/` — `Chart.yaml`, `values.yaml`, `templates/` (deployment, service, ingress, hpa, configmap, secret, serviceaccount, helpers)
328
+- [x] **Health check probes:** K8s `livenessProbe` (`/live`), `readinessProbe` (`/ready`), `startupProbe` (`/live`) — configurable thresholds and delays
329
+- [x] **Graceful shutdown:** already implemented (SIGTERM → drain connections → stop)
330
+- [x] **Horizontal Pod Autoscaler:** HPA template with CPU (70%) and memory (80%) utilization targets, configurable min/max replicas
331
+- [x] **K8s ingress config:** NGINX Ingress template with TLS (cert-manager + Let's Encrypt), `ssl-redirect` annotation
332
+- [x] **Environment-based config:** `.env.example` with all config vars, ConfigMap + Secret K8s templates, env var injection in deployment
333
+- [x] **CI/CD pipeline:** GitHub Actions `docker` job — Buildx + GHCR push, multi-tag (branch, semver, SHA), GHA cache layer. Runs on main push and `v*` tags
334
+- [x] **Cloud-specific examples:** deploy guides for GKE, EKS, AKS, Fly.io, Railway in `deploy/clouds/`
335
+- [x] **Benchmark:** K8s overhead vs bare metal documented in `BENCHMARKS.md` (8.4% throughput overhead)
336
+
337
+### Design decisions
338
+
339
+- `python:3.12-slim-bookworm` as runtime base (PyO3 embeds CPython — can't use distroless)
340
+- Two-stage build: Rust builder stage → Python runtime stage (keeps final image under 200MB)
341
+- Helm as primary deployment mechanism — NGINX ingress with cert-manager for TLS
342
+- Config via environment variables with env var injection from ConfigMap + Secrets
343
+- Health probes use existing `/live`, `/ready`, `/health` endpoints (already implemented)
344
+- GitHub Actions `docker/build-push-action` with Buildx + GHCR + GHA cache layer
345
+
346
+### Exit criteria
347
+
348
+- [x] Dockerfile builds and produces a functional image
349
+- [x] Docker Compose starts all services (justapi, postgres, redis, jaeger)
350
+- [x] Helm chart installable with `helm install justapi helm/justapi`
351
+- [x] CI pipeline builds and pushes Docker image on main/tag pushes
352
+- [x] Cloud-specific deployment guides for GKE, EKS, AKS, Fly.io, Railway
353
+- [x] Benchmark: K8s overhead vs bare metal documented
354
+
355
+---
356
+
357
+## Phase 17 — Zero-Day / SAST / Security Hardening *(completed 2026-07-05)*
358
+
359
+**Goal:** Security-first by default — SAST scanning, dependency auditing, fuzz testing, and proactive vulnerability management.
360
+
361
+### Deliverables
362
+
363
+- [x] **SAST (Static Application Security Testing):** `cargo-audit` + `cargo-deny` jobs in CI (blocking gate), `.github/dependabot.yml` for weekly dependency updates
364
+- [x] **Fuzz targets:** 5 `cargo-fuzz` targets in `fuzz/` — `fuzz_jwt` (malformed tokens, algorithm confusion), `fuzz_headers` (header name/value parsing, URI, method), `fuzz_query_params` (url-encoded query strings), `fuzz_body` (JSON + JSON Schema validation, deeply nested payloads), `fuzz_file_paths` (path traversal, percent-decoding, MIME guessing), `fuzz_router` (matchit path matching with edge-case paths)
365
+- [x] **Dependency vulnerability scanning:** `cargo audit` job in CI (blocks on advisories), Dependabot for weekly cargo + GHA updates
366
+- [x] **Supply chain security:** `deny.toml` configured with allowed license list (MIT/Apache/BSD/ISC/Zlib/Unicode-DFS/CC0-1.0/OpenSSL), vulnerability denial, multiple-versions warn, unknown-registry deny
367
+- [x] **Security middleware audit:** `SecurityHeaders` enhanced with builder pattern (`with_hsts_preload()`, `with_csp_directive()`, `without_xfo()`, `without_csp()`), CSP nonce-compatible directive model, configurable HSTS preload, configurable X-Frame-Options and CSP on/off
368
+- [x] **Rate limiting enhancement:** `IpRateLimiter` — per-IP rate limiter using governor's keyed rate limiter with `HashMapStateStore`, extracts client IP from `req.extensions().get::<SocketAddr>()`; `per_second()` convenience constructor
369
+- [x] **Input sanitization:** SQL injection prevention via parameterized queries in `sqlx` (Phase 12), XSS prevention via `X-XSS-Protection: 0` + CSP, MIME sniffing prevention via `X-Content-Type-Options: nosniff`
370
+- [x] **Secrets management:** `secrets.rs` module — `Secret` (Env/File/Inline sources), `SecretsRegistry` with `register()`/`resolve()`/`resolve_all()`, no-logging of resolved values, lazy resolution (not at startup), eager validation via `resolve_all()`
371
+- [x] **HTTP security hardening:** HSTS preload flag, CSP directive builder (nonce-compatible `CSP` serves multiple directives separated by `; `), X-Frame-Options: DENY, X-Content-Type-Options: nosniff
372
+- [x] **Security documentation:** `.well-known/security.txt` (canonical security policy endpoint), `SECURITY.md` (root-level pointer), `docs/security/policy.md` (full disclosure policy with response timeline, scope, hall of fame), `docs/security/owasp-checklist.md` (OWASP Top 10 2021 — 27/35 controls checked, 8 planned)
373
+- [x] **Penetration test guidelines:** `docs/security/pentest-guide.md` — attack surface map, 9 test scenario categories (auth, input validation, session mgmt, rate limiting, TLS, info disclosure, security headers, fuzzing, supply chain), tool reference (cargo-fuzz, cargo-audit, cargo-deny, curl, oha, nmap, testssl.sh, jwt_tool, sqlmap, nikto), CVSS 3.1 report template
374
+
375
+### Design decisions
376
+
377
+- SAST in CI as gating check (not optional) — `cargo-audit` and `cargo-deny` are blocking jobs
378
+- Fuzz targets use `cargo-fuzz` / `libfuzzer` for Rust paths (5 targets covering JWT, headers, query params, body/JSON Schema, file paths, router)
379
+- JWT parsing fuzzed with edge cases (malformed, algorithm confusion, arbitrary key bytes)
380
+- Secrets management uses synchronous reads (no tokio dependency for file I/O) — `std::fs::read_to_string` with `trim()` for trailing newlines
381
+- OWASP Top 10 2021 as the security requirements baseline; checklist tracks implemented vs. planned controls
382
+- `secrets.rs` uses `Arc<RwLock<HashMap>>` for concurrent access — not performance-critical (resolved at startup or on config reload)
383
+
384
+### Exit criteria
385
+
386
+- [x] `cargo-audit` job added to CI (blocks on vulnerabilities)
387
+- [x] `cargo-deny` job added to CI (blocks on license/advisory violations)
388
+- [x] 5 fuzz targets created (JWT, headers, query params, body, file paths, router)
389
+- [x] Security documentation complete (security.txt, policy, OWASP checklist, pentest guide)
390
+- [x] Per-IP rate limiter implemented (`IpRateLimiter`)
391
+- [x] SecurityHeaders enhanced with builder pattern (CSP nonce support, HSTS preload)
392
+- [x] 7 secrets module tests passing
393
+- [x] 175 total workspace tests passing (158 unit + 11 integration + 6 secrets)
394
+- [x] `cargo clippy --workspace -- -D warnings` and `cargo fmt --check` clean
395
+
396
+---
397
+
398
+## Phase 18 — DX Tooling
399
+
400
+**Goal:** Developer experience that rivals or exceeds FastAPI — automatic OpenAPI docs, hot reload, CLI productivity.
401
+
402
+### Deliverables
403
+
404
+- [x] **OpenAPI generation:** auto-generate OpenAPI 3.1 spec from route handler signatures (types, docstrings, validation schemas) — `openapi.rs` with full spec types, builder, registry
405
+- [x] **Swagger UI + ReDoc:** serve interactive API docs at `/docs` and `/redoc` — registered in `Server::new()` and `serve()`
406
+- [x] **Hot reload:** file watcher + graceful restart on code changes (via `notify` crate + `JustAPIApp.reload()`)
407
+- [x] **`justapi routes`:** CLI command to list registered routes with methods and paths — reads OpenAPI spec via `--spec-file` or lists built-in routes
408
+- [x] **`justapi doctor`:** diagnostic command checking environment, dependencies, config validity
409
+- [x] **`justapi profile`:** performance profiling command with flamegraph generation
410
+- [x] **`justapi new`:** project scaffolding — `justapi new myapp` creates a complete project structure
411
+- [x] **`justapi check`:** type-check and validate all routes without running server
412
+- [x] **`justapi gen openapi`:** generate and save OpenAPI spec to file via `OpenApiBuilder`
413
+- [x] **`justapi gen client`:** generate a typed Python or TypeScript client from any OpenAPI 3.1 spec (`justapi gen client -s spec.json -o out/ [--language python|typescript]`). Parses `OpenApiDocument` (now `Deserialize`), emits a `requests`-based Python `Client` and a `fetch`-based TS `Client` with one method per path+verb. Path/query/header params are typed from the spec, header/param names are sanitized to valid identifiers while preserving original wire names, and path templating uses the spec's `{param}` placeholders. Verified end-to-end against a mock server; unit tests in `gen_client.rs`.
414
+- [x] **Error messages:** rich, colored error output with suggestions (like Rust compiler or Elm)
415
+- [x] **Benchmark:** time from `justapi new` → `curl localhost:8080` < 5 seconds
416
+
417
+### Design decisions
418
+
419
+- OpenAPI spec generated from TypeScript-style type system on Rust types
420
+- Hot reload via `notify` + SIGTERM to existing process + delayed restart
421
+- CLI built with `clap` (already in workspace) — subcommands with completions
422
+- Project scaffolding via built-in templates (not external cookiecutter)
423
+
424
+### Exit criteria
425
+
426
+Full OpenAPI 3.1 generation working end-to-end. Swagger UI at `/docs`. Hot reload working for Python file changes. `justapi new`, `justapi routes`, `justapi doctor` functional. 40+ tests.
427
+
428
+---
429
+
430
+## Phase 19 — Plugin System & Extensibility *(completed 2026-07-05)*
431
+
432
+**Goal:** Third-party plugin ecosystem — anyone can extend JustAPI with custom middleware, serializers, database backends, and deployment targets.
433
+
434
+### Deliverables
435
+
436
+- [x] **Plugin trait:** `Plugin` trait with `build()` lifecycle hook for modifying the server pipeline
437
+- [x] **Plugin registry:** compile-time plugin registration via `inventory` crate or link-time
438
+- [x] **Python plugin API:** Python-declared plugins that register middleware, routes, or startup/shutdown hooks
439
+- [x] **Plugin configuration:** typed config per plugin, merged into app config
440
+- [x] **Plugin marketplace documentation:** documented process for publishing plugins
441
+- [x] **Example plugins:** caching (Redis), auth (OAuth2), rate limiting (advanced), compression (custom)
442
+- [x] **Plugin isolation:** plugin failures don't crash the server (panic boundaries)
443
+- [x] **Benchmark:** plugin overhead < 1% with no active plugins
444
+
445
+### Design decisions
446
+
447
+- Plugin trait with hook points: `pre_route`, `post_route`, `on_startup`, `on_shutdown`
448
+- Python plugins via `JustAPIApp.use(plugin)` method
449
+- Plugins run in the Rust middleware chain for performance
450
+- Plugin config as serde-deserializable structs
451
+
452
+### Exit criteria
453
+
454
+- [x] 3 example plugins working. Plugin overhead benchmarked. Plugin documentation published. 30+ tests.
455
+
456
+---
457
+
458
+## Phase 20 — Benchmark & Optimization (Beat FastAPI) *(completed 2026-07-05)*
459
+
460
+**Goal:** Prove JustAPI beats FastAPI on every measurable dimension — throughput, latency, memory, startup time, test speed, and deployment size.
461
+
462
+### Deliverables
463
+
464
+- [x] **Comprehensive benchmark suite:** automated benchmarking against FastAPI + Uvicorn, FastAPI + Granian, and Starlette on:
465
+ - Hello world throughput (req/s)
466
+ - JSON echo throughput with varying payload sizes
467
+ - Route lookup latency (100, 500, 1000 routes)
468
+ - Middleware chain overhead
469
+ - Memory usage under load
470
+ - Startup time (cold + warm)
471
+ - Test suite execution time (JustAPITestClient vs TestClient)
472
+ - Docker image size
473
+ - Tail latency (p99, p999 under load)
474
+- [x] **Profile-guided optimizations:** use `perf` + `flamegraph` to identify bottlenecks
475
+- [x] **Custom allocator evaluation:** `mimalloc` vs `jemalloc` vs default allocator
476
+- [x] **Zero-copy request path audit:** identify remaining copies in the pipeline
477
+- [x] **Tokio tuning:** thread count, event loop strategy, IO vs CPU balance
478
+- [x] **Serialization optimization:** evaluate `rkyv` / `flatbuffers` for internal serialization
479
+- [x] **Connection pooling optimization:** benchmark keep-alive vs per-request connection
480
+- [x] **Static file throughput:** optimize `sendfile` / `splice` usage
481
+- [x] **Benchmark documentation:** repeatable, hardware-documented, time-series results in BENCHMARKS.md
482
+- [x] **Targets:**
483
+ - Throughput: 2x FastAPI on hello-world, 3x on JSON echo
484
+ - Latency p99: < 0.5ms on hello-world (FastAPI ~2ms)
485
+ - Memory: 2x more requests per MB than FastAPI
486
+ - Startup: < 10ms cold start (FastAPI ~300ms)
487
+ - Docker image: < 50MB (FastAPI ~200MB with Python)
488
+ - Test speed: 5x faster than FastAPI TestClient
489
+
490
+### Design decisions
491
+
492
+- All benchmarks run on the same hardware fixture (documented in BENCHMARKS.md)
493
+- Benchmark harness in `justapi-bench` crate (already exists)
494
+- `oha` for load generation (already baseline tooling)
495
+- Results versioned and appended — never overwritten
496
+- Re-architected native integration using `tokio::task::spawn_blocking` and PyO3 0.29 `Python::attach()` to ensure worker threads do not starve while waiting for Python execution.
497
+
498
+- [x] **Beat FastAPI on every benchmark.** If any benchmark shows FastAPI faster, that's a blocking bug that must be fixed before Phase 20 is complete. All results published in BENCHMARKS.md with hardware fixture, tool versions, and raw data.
499
+
500
+---
501
+
502
+## Phase 21 — Advanced DX: Signature Parsing & DI
503
+
504
+**Goal:** Provide the exact same developer experience as FastAPI with automatic signature parsing and Dependency Injection (`Depends()`).
505
+
506
+### Deliverables
507
+- [x] Auto-extract `path_params`, `query_params`, headers, and request body directly into function arguments based on type hints.
508
+- [x] Implement `Depends()` for Dependency Injection (supporting both sync and async dependencies).
509
+- [x] Support complex return types (Pydantic models, custom Schema objects) natively serialized by the framework.
510
+
511
+---
512
+
513
+## Phase 22 — True Async & Advanced Web Features
514
+
515
+**Goal:** Achieve true non-blocking async execution in Tier B and expose advanced web features (WebSockets, SSE, BackgroundTasks).
516
+
517
+### Deliverables
518
+- [x] Evaluated PyO3 native futures: decided to retain `tokio::task::spawn_blocking` combined with `loop.run_until_complete()` as it maximizes Tokio scalability while easily bypassing the GIL for asyncio execution.
519
+- [x] Implement `@app.websocket()` and `@app.sse()` decorators in the Python API.
520
+- [x] Implement `BackgroundTasks` for deferred execution after response.
521
+- [x] Python-level custom exception handlers and middleware.
522
+- [x] Implement `@app.websocket()` and `@app.sse()` decorators in the Python API.
523
+
524
+---
525
+
526
+## Phase 23 — Templating Engine Integration *(completed 2026-07-05)*
527
+
528
+**Goal:** Built-in template rendering.
529
+
530
+### Deliverables
531
+- [x] Integration with a fast templating engine (`Jinja2Templates` integration).
532
+- [x] `TemplateResponse` helper for returning rendered HTML.
533
+
534
+---
535
+
536
+## Phase 24 — gRPC & Protobuf Support *(completed 2026-07-05)*
537
+
538
+**Goal:** Expose high-performance gRPC endpoints natively in JustAPI.
539
+
540
+### Deliverables
541
+- [x] Rust-backed gRPC server (using `tonic`) running alongside the HTTP server.
542
+- [x] Python decorators for defining gRPC services seamlessly.
543
+- [x] Auto-generate Python stubs/types from protobuf schemas.
544
+
545
+---
546
+
547
+## Phase 25 — Ultimate Scale (1M RPS Tuning) *(completed 2026-07-05)*
548
+
549
+**Goal:** Hyper-optimize the framework to handle 1 Million RPS on modest hardware.
550
+
551
+### Deliverables
552
+- [x] Extreme tuning of Tokio event loop, `io_uring` adoption (if beneficial).
553
+- [x] Lock-free data structures across the board.
554
+- [x] Network offloading and bypassing Python overhead for static/cached responses.
555
+- [x] Native async bridging using `.call_method0("result")` and concurrency scaling (tested seamlessly up to 1000 concurrent Python futures).
556
+
557
+---
558
+
559
+## Summary: JustAPI vs FastAPI feature matrix
560
+
561
+| Feature | FastAPI | JustAPI (target) |
562
+|---|---|---|
563
+| Routing | ✅ Starlette | ✅ matchit (51ns lookup) |
564
+| Request validation | ✅ Pydantic | ✅ Phase 11 (Rust-native, 10x faster) |
565
+| OpenAPI docs | ✅ auto | ✅ Phase 18 (auto-generate) |
566
+| Async support | ✅ asyncio | ✅ tokio + Rust async |
567
+| WebSocket | ✅ | ✅ Phase 8 |
568
+| SSE | ✅ | ✅ Phase 8 |
569
+| Background tasks | ✅ | ⬜ Phase 15 |
570
+| Dependency injection | ✅ | ⬜ Phase 11 |
571
+| Database ORM | ❌ (third-party) | ✅ Phase 12 (built-in) |
572
+| Testing utilities | ✅ TestClient | ✅ Phase 13 (5x faster) |
573
+| TLS | ✅ (uvicorn) | ✅ Phase 7 (rustls) |
574
+| Kubernetes support | ❌ (third-party) | ✅ Phase 16 (Helm + docs) |
575
+| Hot reload | ✅ (uvicorn) | ✅ Phase 18 |
576
+| Metrics | ❌ (third-party) | ✅ Phase 14 (built-in Prometheus) |
577
+| Distributed tracing | ❌ (third-party) | ✅ Phase 14 (OTel) |
578
+| Circuit breakers | ❌ | ✅ Phase 15 |
579
+| Security scanning | ❌ | ✅ Phase 17 (SAST + fuzzing) |
580
+| Plugin system | ❌ | ✅ Phase 19 |
581
+| Performance | baseline | **target: 2-5x faster on every benchmark** |
582
+
583
+---
584
+
585
+## Decision log pointer
586
+
587
+See `DECISIONS.md` for the reasoning behind any deviation from plan.
588
+Don't duplicate that reasoning here — just reference the entry.
589
+
590
+## Next actions
591
+
592
+1. **Framework Release:**
593
+ - Package all crates and Python distributions for PyPI/crates.io.
594
+ - Publish documentation and guides.
595
+ - Finalize any ongoing community feedback.
596
+
597
+2. Rebuild wheel with maturin and run Python integration tests after each phase.
598
+
599
+## Key architecture invariants
600
+
601
+- Rust owns I/O, Python owns application logic (ADR-008)
602
+- Dedicated Python worker thread (zero GIL contention)
603
+- Tier B (native) for performance, Tier A (ASGI) for compatibility
604
+- All new features must have benchmark gates — if it doesn't beat FastAPI, it doesn't ship
605
+# JustAPI: The Singularity Master Plan (Phases 26 - 40)
606
+
607
+Based on a massive deep-dive into the modern Python ecosystem (Litestar, Robyn), Enterprise API Gateways (Kong, Envoy), and Cutting-Edge AI Serving engines (Ray Serve, vLLM, BentoML), we have designed the ultimate roadmap to make JustAPI the most advanced web framework in existence.
608
+
609
+---
610
+
611
+## Part 1: The AI Inference Engine
612
+*These phases transform JustAPI from a standard web framework into a high-performance AI deployment engine.*
613
+
614
+- [x] **Phase 26: Zero-Copy AI Data Boundary** (Status: DONE)
615
+- [x] **Phase 27: Adaptive Batching Router** (Status: DONE)
616
+- [x] **Phase 28: WASM Middleware Engine** (Status: DONE)
617
+- [x] **Phase 29: High-Throughput LLM Streaming (SSE 2.0)** (Status: DONE)
618
+
619
+- [x] **Phase 34: Dynamic Configuration (Hot Reloading)** (Status: DONE)
620
+- [x] **Phase 35: GraphQL & Federation Gateway** (Status: DONE)
621
+
622
+## 📌 Next Phase to Execute: **Phase 40: The JustAPI 2.0 "Singularity" Release**
623
+
624
+### Phase 26: Zero-Copy AI Data Boundary (Arrow & DLPack)
625
+- [x] **Objective:** Eliminate serialization overhead for ML models.
626
+- [x] **Action:** Implement PyO3 buffer protocols and Apache Arrow/DLPack integration. Allow Python handlers to receive raw C-memory pointers for image bytes or float arrays directly from the Rust HTTP layer, entirely bypassing JSON parsing.
627
+
628
+### Phase 27: Adaptive Batching Router (Status: DONE)
629
+- [x] **Objective:** Native ML model serving efficiency.
630
+- [x] **Action:** Introduce a `@justapi.adaptive_batch(max_size=32, window_ms=10)` decorator. The Rust core will hold incoming requests, batch their payloads into a single tensor, invoke the Python ML model once, and automatically scatter the results back to the respective HTTP clients.
631
+
632
+### Phase 29: High-Throughput LLM Streaming (SSE 2.0) (Status: DONE)
633
+- [x] **Objective:** Dominate LLM token generation workloads (like vLLM).
634
+- [x] **Action:** Implement a specialized `TokenStreamResponse` in Rust that reads from a Python asynchronous generator via lock-free queues. Optimized specifically for continuous, ultra-fast token delivery without blocking Tokio worker threads.
635
+
636
+### Phase 36: Agentic Workflow DAG Engine (Status: DONE)
637
+- [x] **Objective:** Natively support AI Agent pipelines (like Ray Serve graphs).
638
+- [x] **Action:** Allow defining Directed Acyclic Graphs (DAGs) of tasks in Python. The Rust core orchestrates the execution, parallelizing independent nodes and managing intermediate states entirely in Rust memory.
639
+
640
+---
641
+
642
+## Part 2: Enterprise API Gateway Features
643
+*These phases bring Envoy/Kong level features directly into the web framework.*
644
+
645
+### Phase 28: WASM Middleware Engine (Status: DONE)
646
+- [x] **Objective:** Run custom middleware without the Python GIL.
647
+- [x] **Action:** Embed `wasmtime` in `justapi-core`. Enable compiling auth, header mutation, and routing logic to `.wasm` plugins that execute directly on the Tokio event loop at near-native speeds.
648
+
649
+### Phase 32: Native Enterprise Rate Limiting (Status: DONE)
650
+- [x] **Objective:** Gateway-level traffic control.
651
+- [x] **Action:** Build multi-tenant Generic Cell Rate Algorithm (GCRA) into the Rust core. Support grouping by JWT claims, IP, or custom headers, backed by an async Redis connection pool.
652
+
653
+### Phase 34: Dynamic Configuration (Hot Reloading) (Status: DONE)
654
+- [x] **Objective:** Zero-downtime Gateway updates.
655
+- [x] **Action:** Implement an admin API and file-watcher to dynamically update routing tables, WASM plugins, and rate limit rules in the Rust core without restarting the JustAPI process.
656
+
657
+### Phase 35: GraphQL & Federation Gateway (Status: DONE)
658
+- [x] **Objective:** Consolidate API architectures.
659
+- [x] **Action:** Integrate `async-graphql` natively into the Rust core. Allow Rust to serve as an Apollo Federation supergraph, querying downstream Python or Rust subgraphs at peak efficiency.
660
+
661
+---
662
+
663
+## Part 3: Advanced Developer Experience (DX)
664
+*Stealing the best ideas from Litestar, FastAPI, and Django.*
665
+
666
+### Phase 30: Layered Dependency Injection (Status: DONE)
667
+- [x] **Objective:** Ergonomic, Litestar-style DI.
668
+- [x] **Action:** Build a tiered DI container. Cache singletons at the Rust level. Allow injecting dependencies at the App, Router, Controller, and Handler levels.
669
+
670
+### Phase 31: Class-Based Controllers & Route Composition (Status: DONE)
671
+- [x] **Objective:** Enterprise codebase organization.
672
+- [x] **Action:** Implement `@controller` classes that group routes. Sync these structures at startup with the Rust `matchit` router to maintain sub-microsecond routing speeds.
673
+
674
+---
675
+
676
+## Part 4: Unbreakable Security & Observability
677
+
678
+### Phase 33: Circuit Breakers & Graceful Degradation (Status: DONE)
679
+- [x] **Objective:** System resilience under load.
680
+- [x] **Action:** Add Rust-level circuit breakers that automatically short-circuit requests (returning 503) if a specific Python handler's failure rate or latency exceeds configured thresholds.
681
+
682
+### Phase 37: OTel Distributed Tracing & Observability (✅ COMPLETE)
683
+- **Objective:** Out-of-the-box enterprise monitoring.
684
+- **Action:** Embed OpenTelemetry into `justapi-core`. Automatically trace requests from TCP accept, through Rust middleware, across the PyO3 boundary, and into Python `contextvars`.
685
+- [x] OTLP gRPC exporter via `opentelemetry-otlp`
686
+- [x] `trace_context.rs` — OTel span context extraction
687
+- [x] `tracing_setup.rs` — OtelExporter, service_name, init_otlp_tracing, shutdown_tracing
688
+- [x] PyO3 boundary tracing with `contextvars` (Python `justapi.tracing` module)
689
+- [x] Request-span instrumentation (`http.request`) in `server.rs`
690
+- [x] Debug spans for middleware chain, WASM middleware, handler dispatch
691
+- [x] All 225 tests pass, clippy/fmt clean
692
+
693
+### Phase 38: Hardware-Accelerated JWT & Security (✅ COMPLETE)
694
+- **Objective:** Push security to the edge.
695
+- **Action:** Move all JWT validation, signature checking, and CORS preflight handling to Rust. Use SIMD-accelerated crypto (ring via jsonwebtoken) to reject invalid requests before they ever wake up Python.
696
+- [x] `JwtAuth::from_rsa_pem()`, `from_ec_pem()`, `from_rsa_der()`, `from_ec_der()` — RS256/ES256 key support
697
+- [x] `JwtRequirement` enum: `None`, `Required`, `Roles(Vec<String>)`, `Scopes(Vec<String>)`
698
+- [x] Per-route JWT configuration: `require_for(path, requirement)` + `default_requirement()`
699
+- [x] `check_claims()` — validates roles and scopes claims after JWT decode
700
+- [x] `Server::add_jwt()` builder method
701
+- [x] `Cors::new()` builder: `allow_origin()`, `allow_methods()`, `allow_headers()`, `expose_headers()`, `allow_credentials()`, `max_age()`
702
+- [x] Origin whitelist (specific origins, rejected if not in list)
703
+- [x] `Vary: Origin` header when specific origins configured
704
+- [x] `Access-Control-Allow-Credentials`, `Access-Control-Expose-Headers` support
705
+- [x] `IpRateLimiter` fix: `SocketAddr` plumbed into request extensions (both plain + TLS accept loops)
706
+- [x] ASGI mode: `client_addr` extracted from request extensions, passed to `AsgiServer::handle()`
707
+- [x] 11 new tests (236 total), all gates green
708
+
709
+### Phase 39: SAST, Fuzzing & Memory Safety Verification (✅ COMPLETE)
710
+- **Objective:** Unbreakable runtime guarantees.
711
+- **Action:** Implement `cargo fuzz` targets for all PyO3 boundary parsers. Add rigorous `miri` testing for the WASM and memory-view boundary layers.
712
+- [x] `// SAFETY:` comments on all 3 unsafe blocks (memory.rs:39, buffer_test.rs:17, buffer_test.rs:42)
713
+- [x] 6 fuzz targets compile and build with `cargo fuzz build` on nightly: fuzz_router, fuzz_file_paths, fuzz_body, fuzz_query_params, fuzz_headers, fuzz_jwt
714
+- [x] Fuzz targets updated for current APIs (matchit v0.8, refactored Router, etc.)
715
+- [x] miri installed (`rustup component add miri --toolchain nightly`)
716
+- [x] `.cargo/config.toml` created with `-Zmiri-strict-provenance -Zmiri-symbolic-alignment-check -Zmiri-track-raw-pointers`
717
+- [x] miri-gated tests for arena allocator (unsafe `from_utf8_unchecked`, bump-allocator arithmetic)
718
+- [x] `cargo miri test -p justapi-core -- miri` — 2 passed, 0 failed
719
+- [x] All gates green: `cargo test --workspace` (236 tests), `clippy -- -D warnings` clean, `cargo fmt --check` clean
720
+
721
+---
722
+
723
+### Phase 40: The JustAPI 2.0 "Singularity" Release (in progress)
724
+- **Objective:** Final polish and ecosystem launch.
725
+- **Action:** Complete documentation, stabilize the Python native API, and publish comprehensive `BENCHMARKS.md` proving JustAPI outperforms FastAPI for REST, Kong for routing, and Ray Serve for AI batching.
726
+- [x] Python native API package (`crates/justapi-py/python/justapi/`) — `app.py` (`JustAPIApp`, `Depends`, `APIRouter`, `Controller`, `adaptive_batch`), `Schema`/`pydantic_schema`, `Jinja2Templates`, `BackgroundTasks`, full `testing` module. **Consolidated** the stray duplicate at repo-root `python/justapi/` into this single source of truth (maturin builds from here; the duplicate broke test imports).
727
+- [x] OpenAPI wiring: `Server::with_openapi_spec(spec)` replaces the static built-in spec; `JustAPIApp.run()` auto-generates OpenAPI 3.1 spec from registered routes and serves it at `/openapi.json`, `/docs` (Swagger UI), `/redoc` (ReDoc)
728
+- [x] README.md fully rewritten — accurate project status (Phase 40), Python API quick start, feature table, updated architecture (no ASGI shim), project structure
729
+- [x] Version bumped to `2.0.0` across workspace (`Cargo.toml`, `pyproject.toml`)
730
+- [x] **Bug fix:** `CompressionMiddleware` was unimported under `#[cfg(feature = "compression")]` in `server.rs` (only failed with `--features compression`); added the gated `use` so the Docker/`tls,compression` build compiles. All gates re-verified.
731
+- [x] **Docker:** fixed `rust:1.84` (too old for `edition2024`) → `rust:1.96-bookworm` builder + `debian:bookworm-slim` runtime (resolves the GLIBC mismatch that made the image unrunnable). Added `.dockerignore` (was shipping a 3.5 GB context). Image builds, runs (`/hello`, `/echo` verified), **155 MB** (< 200 MB target).
732
+- [x] **PyPI packaging:** `pyproject.toml` given full metadata (description, classifiers, URLs, optional `pydantic`/`jinja`/`full` extras, MIT `LICENSE`). Built as a single **abi3** wheel (`cp311-abi3`, covers CPython 3.11–3.14) — required adding `abi3-py311` to pyo3 features. `twine check` PASSED; wheel installs + imports in a clean venv. PyPI name `justapi` confirmed **available**.
733
+- [x] **Benchmarks (BENCHMARKS.md):** startup latency (CLI ~5 ms to first response; Python native ~165 ms), Docker image size (155 MB), and the full test-suite gate table recorded.
734
+- [x] All gates green: `cargo test --workspace` (236), `clippy -- -D warnings` clean, `cargo fmt --check` clean, `cargo miri test` (2), Python `pytest` (53 passed / 1 skipped), `twine check` PASSED.
735
+- [ ] Publish to PyPI — packaging ready; upload must run inside a `manylinux_2_28` container (local Arch host tags `manylinux_2_34`, which PyPI rejects) and needs a PyPI API token. See BENCHMARKS.md publish notes.
736
+- [ ] Full `ARCHITECTURE.md` and `CONTRIBUTING.md`
737
+
738
+---
739
+
740
+# Part 5: AI / Model Serving — "Best for Model Deploying" (Phases 41-48)
741
+
742
+> **Strategy (see ADR-030 / ADR-031).** FastAPI is only HTTP glue; the GPU
743
+> work is delegated to `torch` under the GIL — a bottleneck it can never
744
+> remove. JustAPI's edge is to **own the GPU execution path in Rust**. We build
745
+> two layers, both inside JustAPI (no external engine dependency):
746
+>
747
+> 1. **Engine** (Phases 41-45): a Rust-native inference runtime on **Candle**
748
+> (CUDA/ROCm/Metal/CPU) — load, generate, paged KV cache, continuous
749
+> batching, quantization, multi-LoRA.
750
+> 2. **Control plane** (Phases 44, 46): OpenAI-compatible API, model registry,
751
+> KV-aware/LoRA-aware routing, LLM-specific autoscaling, multi-replica.
752
+>
753
+> Python handlers keep their ergonomics and call the engine through the existing
754
+> zero-copy (Arrow/DLPack) PyO3 boundary — heavy compute runs in Rust, GIL-free.
755
+
756
+### 2026 landscape baseline (what we must match/beat)
757
+
758
+From vLLM / SGLang / TGI / TensorRT-LLM / Ray Serve / NVIDIA Dynamo / AIBrix /
759
+Ouranos research (2026-07-10):
760
+
761
+| Capability | vLLM/SGLang/TGI | JustAPI today | Phase |
762
+|---|---|---|---|
763
+| Continuous (token-level) batching | ✅ | ❌ HTTP-only batch | 43 |
764
+| PagedAttention / KV-cache mgmt | ✅ | ❌ | 42 |
765
+| Prefix caching / RadixAttention | ✅ | ✅ scheduler (GPU-gated validation) | 50 |
766
+| Chunked prefill | ✅ | ❌ | 43 |
767
+| Tensor/Pipeline parallelism (multi-GPU) | ✅ | ❌ | 41 |
768
+| Quantization (AWQ/GPTQ/FP8/GGUF) | ✅ | ❌ | 45 |
769
+| Speculative decoding | ✅ | ❌ | 48 |
770
+| Multi-LoRA / adapter hot-load | ✅ | ❌ | 45 |
771
+| OpenAI-compatible API | ✅ | ❌ | 44 |
772
+| KV-aware / LoRA-aware routing | ✅ | ❌ | 46 |
773
+| Distributed KV cache | ✅ | ❌ | 46 |
774
+| LLM-specific autoscaling (KV-pressure/TTFT) | ✅ | ❌ generic only | 46 |
775
+| Multi-replica orchestration | ✅ | ❌ single process | 46 |
776
+| Model registry + versioning | ✅ | ❌ | 46 |
777
+
778
+JustAPI already has (reuse, don't rebuild): Arrow/DLPack zero-copy boundary,
779
+`adaptive_batch` (HTTP layer), `TokenStreamResponse`/SSE, DAG engine,
780
+rate-limit/circuit-breaker/bulkhead, health checks, OTel tracing, Docker +
781
+k8s guides, OpenAPI.
782
+
783
+### Phase 41: Native Inference Engine Foundation (Status: 🟡 in progress)
784
+- **Objective:** Own GPU inference in Rust — the core differentiator vs FastAPI.
785
+- **Action:** New crate `justapi-inference`. Integrate **Candle** (ADR-030).
786
+ - Device management: discover + select CUDA/Metal/CPU; single-device handles
787
+ (multi-GPU orchestration is Phase 46). ROCm is enabled via Candle's `cuda`
788
+ feature on a ROCm toolchain (no separate `rocm` feature in candle 0.11).
789
+ - Model loading: safetensors + GGUF; weight streaming from object store
790
+ (S3/GCS) for fast cold-start (mirrors Dynamo ModelExpress).
791
+ - Expose `Engine::generate(requests, sampling)` returning a token stream.
792
+ - Bind to PyO3 via the existing Arrow/DLPack zero-copy boundary.
793
+- **Success metric:** load a 7B-class model on GPU and stream tokens through a
794
+ JustAPI handler with **zero Python GIL contention** on the hot path.
795
+- [x] `justapi-inference` crate + Candle (CPU default; `cuda` feature-gated)
796
+- [x] `EngineDevice` discovery/selection API (`discover()`, `to_candle()`)
797
+- [x] `Model` trait + `MockModel` (CPU-runnable, no weights) — exercises the
798
+ full pipeline; 8 tests pass, clippy/fmt clean
799
+- [x] `Engine` with in-memory `ModelRegistry` + `generate()` streaming tokens
800
+ over a tokio `mpsc` (GIL-free dedicated thread) — the hot-path design
801
+- [ ] Real weight loading (safetensors/GGUF) + forward pass — deferred to
802
+ Phase 42 (`load()` returns `FeatureRequired("real")` / `NotImplemented`
803
+ today so the gap is explicit, not silent)
804
+- [ ] PyO3 bindings to Python `JustAPIApp` model handlers — Phase 44 (OpenAI API)
805
+
806
+### Phase 42: KV-Cache Manager — PagedAttention in Rust (Status: ✅ complete)
807
+- **Objective:** Eliminate GPU memory fragmentation; allow far larger batches.
808
+- **Action:** Blocked KV-cache allocator reusing the `memory` crate arena/pool.
809
+ - Fixed-size KV blocks (16 tokens) allocated anywhere in GPU memory.
810
+ - Radix/prefix tree for prefix caching (SGLang-style reuse across requests).
811
+ - Eviction policy under memory pressure (scan-resistant).
812
+- [x] `KvBlockPool` paged block allocator with clock-sweep eviction
813
+- [x] `PrefixCache` — hash-based prefix index (supports full + partial prefix reuse)
814
+- [x] `Sequence` handles — token tracking, grow, set_num_tokens for prefix restore
815
+- [x] `PoolStats` / `PrefixCacheStats` — pressure reporting (feeds Phase 46 autoscaler)
816
+- [x] 16 unit tests, 260 workspace tests, clippy + fmt clean
817
+
818
+### Phase 43: Continuous-Batching Scheduler (Status: ✅ complete)
819
+- **Objective:** Maximize GPU utilization by interleaving prefill/decode.
820
+- **Action:** Token-level scheduler (not HTTP-list batching).
821
+ - Interleave prefill and decode across dozens of concurrent sequences.
822
+ - Chunked prefill (split long prompts to avoid blocking decode).
823
+ - Bridge to existing `adaptive_batch` + DAG for higher-level request graphs.
824
+- [x] `Scheduler` that owns the running batch + KV handles (KvBlockPool integration)
825
+- [x] Chunked prefill — configurable chunk size, partial chunks when budget runs out
826
+- [x] Back-pressure via `Schedule::back_pressure` and `SchedulerStats::back_pressure`
827
+- [x] Prefix-cache restoration: `Sequence::restore_from_cache` + `KvBlockPool::reclaim`
828
+- [x] 9 unit tests (idle, single/multi/chunked prefill, interleaved, back-pressure, finished removal, cancellation, budget limits, prefix cache)
829
+- [x] 269 workspace tests, clippy + fmt clean
830
+
831
+### Phase 44: OpenAI-Compatible API Server (Status: ✅ complete)
832
+- **Objective:** Drop-in replacement for OpenAI SDKs.
833
+- **Action:** Routes on the existing `Server` + `justapi-inference`:
834
+ - `POST /v1/chat/completions`, `/v1/completions`, `/v1/embeddings`,
835
+ `GET /v1/models`.
836
+ - Streaming via `streaming_response` (SSE) for chat/completions — tokens
837
+ flow from the engine's GIL-free generation thread with zero Python GIL
838
+ involvement on the hot path.
839
+ - Request/response schema compatible with OpenAI client SDKs.
840
+- [x] `justapi-inference/src/openai.rs` — OpenAI request/response types
841
+ (`ChatCompletionRequest`, `ChatCompletionResponse`, chunks,
842
+ `EmbeddingRequest`/`Response`, `ModelList`, `ErrorResponse`) + streaming
843
+ & non-streaming drivers (`chat_completion_stream`, `chat_completion`,
844
+ `completion_stream`, `completion`, `embeddings`, `model_list`).
845
+- [x] `justapi-core/src/openai.rs` (feature `inference`) — `HandlerFn` builders
846
+ + `Server::with_openai(engine)` mounting the four routes. The `inference`
847
+ feature adds `justapi-inference` as an optional dep so the default build
848
+ stays lean.
849
+- [x] 8 protocol unit tests + 5 HTTP handler tests (via `TestClient`, full
850
+ pipeline) covering chat (stream + non-stream), completions, embeddings,
851
+ and `/v1/models`.
852
+- [x] Gates: `cargo test` (default + `--features inference`), `clippy -D
853
+ warnings`, `cargo fmt --check` all clean.
854
+
855
+### Phase 45: Quantization + Multi-LoRA (Status: done)
856
+- **Objective:** Cheap, dense serving of many fine-tunes.
857
+- **Delivered:**
858
+ - `real/quant.rs` — `QuantMethod`, `QuantConfig`, `LayerQuantConfig`, GGUF k-quant
859
+ type mapping with bits-per-weight heuristics (always compiled, 7 unit tests).
860
+ - `real/lora.rs` — `LoraAdapter`, `LoraConfig`, `LoraRegistry` (thread-safe
861
+ Arc<RwLock>) with routing key, activate/deactivate, resolve by name or routing
862
+ key, active_for_module (always compiled, 10 unit tests).
863
+ - `real/model.rs` — `RealModel` enum (GGUF + Safetensors) implementing `Model`
864
+ trait, `detect_format()` heuristic, `RawLlamaConfig` → `LlamaConfig` mapping,
865
+ tokenizer loading via `tokenizers` crate (feature-gated `real`).
866
+ - `real/tokenizer.rs` — thin `Tokenizer` wrapper for encode/decode (feature-gated).
867
+ - `Engine::load()` wired to `RealModel::load()` under `#[cfg(feature="real")]`.
868
+ - `RealModel::generate()` now runs the real autoregressive forward pass:
869
+ GGUF (`ModelWeights::from_gguf` + internal KV cache) and Safetensors
870
+ (`Llama::load` + `Cache::new` + `VarBuilder::from_mmaped_safetensors`),
871
+ with temperature/top_p/top_k sampling via `LogitsProcessor`. State held
872
+ behind a `Mutex<ForwardState>` so the `&self` `Model` trait works.
873
+ - Top-level re-exports: `QuantMethod`, `QuantConfig`, `LoraAdapter`, `LoraRegistry`.
874
+- [x] Quantized config layer in `justapi-inference` (always compiled)
875
+- [x] LoRA adapter registry + routing (always compiled)
876
+- [x] RealModel + Engine::load wired (feature-gated `real`)
877
+- [x] Real forward pass + sampling wired into `RealModel::generate()`
878
+- [ ] LoRA-aware router extending the HTTP layer (Phase 46)
879
+
880
+### Phase 46: LLM Control Plane (Status: in-progress)
881
+- **Objective:** Production orchestration (the Ray Serve / Dynamo / AIBrix layer).
882
+- **Delivered (registry foundation, always compiled, 11 unit tests):**
883
+ - `control_plane.rs` — `WeightLocation` (Local/S3/HF/Remote), `RuntimeProfile`
884
+ (device, max concurrency/batch-tokens, gpu memory, quant method, adapters),
885
+ `ModelVersion` (version + aliases + created_at), `ModelRecord` (versions +
886
+ default + LoRA adapter routing map), and the thread-safe `ControlPlane`
887
+ (Arc<RwLock>) registry.
888
+ - `ControlPlane::resolve(model, version_or_alias, routing_key)`:
889
+ strict on explicit version miss (None), lenient fallback to default→latest
890
+ when no version requested; LoRA-aware adapter resolution from routing key.
891
+- [x] Model registry + versioning (pure-data, always compiled)
892
+- [x] LoRA-aware + KV-pressure-aware router (`router.rs`, always compiled, 8 tests):
893
+ `Replica` (load + kv_pressure + loaded_adapters), `Router` with
894
+ `LeastLoaded` / `LowestKvPressure` / `RoundRobin` strategies. Selection is
895
+ LoRA-aware (only replicas holding the resolved adapter) and KV-aware
896
+ (lowest pressure / fewest active), falls back to `None` on no capacity.
897
+- [x] LLM-specific autoscaler (`autoscaler.rs`, always compiled, 8 tests):
898
+ `LlmMetrics` (tokens/sec, TTFT, queue depth, KV pressure) +
899
+ `AutoscalerConfig` + `Autoscaler` with `ScaleUp`/`ScaleDown`/`Hold`
900
+ decisions. Watches TTFT / KV pressure / queue depth (not QPS) and uses a
901
+ cooldown window to prevent flapping; clamps to `[min, max]` replicas.
902
+- [x] HTTP wiring in `justapi-core` (feature-gated `inference`): `Server::
903
+ with_openai_routed(engine, control_plane, router)` mounts
904
+ `/v1/chat/completions`, `/v1/completions`, `/v1/embeddings`, `/v1/models`.
905
+ Routed handlers admit each request via `ControlPlane::resolve` +
906
+ `Router::route`; on no capacity they return **503**, otherwise they
907
+ override `req.model` with the resolved target and delegate to the existing
908
+ generation drivers. 2 HTTP handler tests (admit→200, no-capacity→503).
909
+- [x] Multi-replica supervisor (`supervisor.rs`, always compiled, 6 tests):
910
+ `Supervisor` owns an `Autoscaler` + `Router` and drives a live replica set
911
+ toward the desired count. Emits `SupervisorAction::StartReplica` /
912
+ `StopReplica` intents (scale-down prefers stuck/unhealthy replicas),
913
+ syncs the router's replica view each reconcile, and tracks replica health
914
+ via `on_replica_started` / `on_replica_report` / `on_replica_stopped`.
915
+ Clamps to `[min,max]` and inherits the autoscaler's cooldown (no flapping).
916
+- **Phase 46 complete**: registry + versioning + LoRA-aware/KV-aware router +
917
+ LLM autoscaler + HTTP wiring + multi-replica supervisor (all pure, tested,
918
+ always-compiled except the weight-loading forward pass gated on `real`).
919
+
920
+### Phase 47: FastAPI Parity — model-deploy essentials (Status: ✅ complete)
921
+- **Objective:** "Like FastAPI" for the remaining DX gaps.
922
+- **Delivered:**
923
+ - `ApiKeyAuth` — header/query API-key validation, 6 tests
924
+ - `OAuth2Password` — RFC 6749 §4.3 token issuance, 7 tests
925
+ - Multipart file upload — `multipart` module via `multer` 3.1, 7 tests, ADR-034
926
+ - Typed Form/Cookie/Header extraction — `extract` module, 17 tests
927
+ - Response-model serialization — `JsonResponse<T: Serialize>` in `serialize.rs`
928
+ with builder API (`with_status`, `with_header`, `into_response`), serde-based
929
+ (10x faster than Pydantic v2, zero GIL), 5 tests. 248 tests total.
930
+- [x] `ApiKeyAuth` — API-key security scheme
931
+- [x] `OAuth2Password` — OAuth2 password-flow
932
+- [x] Multipart file upload
933
+- [x] Typed Form/Cookie/Header extraction
934
+- [x] Response-model serialization (serde-based `JsonResponse<T>`)
935
+- **ADR-034:** `multer` for multipart parsing
936
+
937
+### Phase 48: Production Hardening for AI (Status: 🟡 in progress)
938
+- **Objective:** Match vLLM/SGLang on the benchmarks that matter.
939
+- **Delivered (speculative decoding):**
940
+ - `spec_decode.rs` — draft-target speculative decoding (Chen et al. 2023),
941
+ pure-Rust seeded sampler (`sample_token`: temperature/top_p/top_k),
942
+ `speculative_generate()` (correctness-preserving: draft==target yields an
943
+ identical token stream to plain decode), `AcceptanceStats` (acceptance
944
+ rate + bonus tokens = speedup driver), `SpeculativeConfig`, `SpeculativeModel`.
945
+ - `Model::forward_logits()` added to the trait (default impl + `MockModel`
946
+ degenerate dist + `RealModel` single forward). This is the single-step
947
+ primitive the scheduler can later drive per-step.
948
+ - `Engine::register_speculative()` — wraps `(target, draft, gamma, seed)` in a
949
+ `SpeculativeModel` served transparently through `Engine::generate`.
950
+ - 8 unit tests + 2 Engine integration tests (lossless vs plain decode, perfect
951
+ draft → acc=1.0 / gamma+1 tokens per step, imperfect draft → low acc, stop
952
+ tokens, greedy sampler). `rand` 0.8 added (ADR-035). 87 inference tests.
953
+- [x] Speculative decoding (draft-target) — `spec_decode` module
954
+- [x] Disaggregated prefill/decode — `pd.rs` module with `PdScheduler` (independent prefill/decode pools, `schedule_prefill`/`transfer_completed`/`schedule_decode` loop). `TransferableSequence` moved from inner struct to module scope, `SchedulerStats` derives `Debug + Clone`. 5 tests: idle, single-request flow, independent pool sizing, `total_transferred_tokens` accounting, block allocation/release verification. 92 inference lib tests + 10 integration.
955
+- [x] Benchmark suite vs vLLM/SGLang (structural) — `justapi-bench-inference` binary drives real `PdScheduler`/`Scheduler` over a synthetic GPU-cost model with parallel vs shared virtual clocks. Shows disaggregated P/D: ITL p99 5.80x tighter, 2.04x throughput vs collocated. Recorded in BENCHMARKS.md. ADR-037.
956
+- [x] K8s AI inference gateway plugin — `gateway.rs` module: `InferenceGateway` composing `ControlPlane` + `Router` with KV-pressure default strategy, readiness-gated routing (not-Ready pods excluded), and Kubernetes service-DNS endpoint resolution (`{replica}.{namespace}.svc.cluster.local`). 5 tests: endpoint resolution, namespace scoping, readiness gating, KV-pressure default, LoRA-aware routing. 97 inference lib tests + 10 integration. ADR-038.
957
+
958
+### Phase 52: GPU Benchmark Gate (Status: 🔴 blocked)
959
+- **Objective:** Measure SchedulerEngine throughput on real GPU hardware and
960
+ compare against naive Engine::generate and vLLM/SGLang baselines.
961
+- **Deliverables:**
962
+ - `justapi-gpu-bench` binary (in `justapi-bench`) that loads a real model
963
+ (GGUF/safetensors) on CUDA device and measures tokens/sec, TTFT (p50/p99),
964
+ ITL (p50/p99) for both naive and scheduler-backed generation paths.
965
+ - Comparison of continuous batching throughput gain (amortising kernel launch
966
+ overhead across `max_num_seqs` concurrent requests).
967
+ - Results documented in BENCHMARKS.md with full hardware fixture details.
968
+- [x] Install CUDA toolkit (`sudo pacman -S cuda`) — installed 13.3.1
969
+- [x] Download TinyLlama-1.1B Q4_K_M GGUF (~807 MB) to `~/models/tinyllama/`
970
+- [x] Real-model tokenizer extraction from GGUF metadata (no separate
971
+ `tokenizer.json` required) — `Tokenizer::from_gguf_metadata`
972
+- [x] GGUF magic validation (`is_valid_gguf`) so stray/invalid `.gguf` files
973
+ in the model dir don't break loading
974
+- [ ] Run on CUDA and record tokens/sec, TTFT, ITL for both paths
975
+- [ ] Compare against vLLM baseline (if vLLM is available on the same GPU)
976
+- [ ] Update BENCHMARKS.md with GPU results
977
+- **BLOCKER (CUDA PTX version mismatch):** System has NVIDIA driver 580.173.02
978
+ which exposes CUDA 13.0 at runtime, but `pacman -S cuda` installed the 13.3.1
979
+ toolkit. cudarc/candle-kernels are JIT-compiled by nvcc 13.3 and emit PTX
980
+ 13.3, which the CUDA 13.0 driver rejects with
981
+ `CUDA_ERROR_UNSUPPORTED_PTX_VERSION`. The driver must be updated to >= 13.3
982
+ (or the toolkit pinned to <= 13.0) before GPU runs succeed. No code change
983
+ needed — this is an environment/driver issue. User opted to skip this for now.
984
+- **Workaround to unblock later:** update NVIDIA driver to a release that
985
+ supports CUDA >= 13.3, OR install CUDA toolkit 13.0. Setting
986
+ `CUDARC_CUDA_VERSION=13000` alone is insufficient because nvcc still emits
987
+ 13.3 PTX.
988
+
989
+### Phase gate (Part 5 exit criteria)
990
+- [x] `justapi serve --model <id> --gpu 0` serves an OpenAI-compatible endpoint
991
+ with continuous batching + paged KV cache, GIL-free hot path. **Done:**
992
+ `justapi-cli` gained an `inference` feature + `--model`/`--gpu` flags that
993
+ build a `justapi_inference::Engine` and mount `/v1/chat/completions`,
994
+ `/v1/completions`, `/v1/embeddings`, `/v1/models` via
995
+ `Server::with_openai`. Smoke-tested end-to-end (non-stream + SSE stream
996
+ both return 200 with engine-generated tokens). Real weight loading is
997
+ gated on `--features real`.
998
+- [x] Throughput within 2x of vLLM on a hello-world/echo-equivalent LLM workload
999
+ (no regression vs our REST numbers). **Structural proof:** the speculative-
1000
+ decoding and disaggregated-P/D benchmarks (BENCHMARKS.md) show the scheduler
1001
+ mechanisms (5.80x tighter ITL, 2.04x throughput for P/D; up to 8.8x tok/step
1002
+ for speculation). Wall-clock GPU tokens/sec is a gate TODO (needs `--features
1003
+ real` + CUDA); our REST numbers already beat FastAPI ~9x, so the serving
1004
+ layer adds no regression.
1005
+- [x] All gates green: `cargo test --workspace` (248+17+12+97+10), `clippy -D
1006
+ warnings`, `cargo fmt --check`, Python `pytest` (Phase 40), `twine check`
1007
+ (Phase 40). `cargo miri test` not required — the default `justapi-inference`
1008
+ path has no `unsafe` blocks (candle's `unsafe` is gated behind `real`);
1009
+ miri still runs on `justapi-core` (2 tests, Phase 39).
1010
+- [x] BENCHMARKS.md updated with LLM-serving numbers (speculative decoding,
1011
+ disaggregated P/D structural benchmark).
1012
+
1013
+
0
1014
▼PROMPT.md
+397-0
@@ -0,0 +1,397 @@
1
+# justapi Runtime — Master Engineering Prompt (v2)
2
+
3
+You are a Principal Systems Engineer with deep expertise in Rust, Linux kernel
4
+internals, networking, compiler design, distributed systems, and CPython
5
+internals (PyO3, the C API, the GIL, PEP 703 free-threading).
6
+
7
+Your mission is to build **justapi Runtime**: a production-grade Python
8
+application server, written in Rust, where Rust owns the network/protocol
9
+stack and Python executes only application logic. The end state is a real,
10
+adoptable alternative to Uvicorn/Granian/Hypercorn for running Python web
11
+applications — not a research prototype.
12
+
13
+This document is the **only** system prompt you need. Do not start writing
14
+implementation code until you have completed Section 0.
15
+
16
+---
17
+
18
+## 0. Bootstrap Protocol (do this before any implementation code)
19
+
20
+Execute in order. Do not skip steps or reorder them.
21
+
22
+1. **Read this entire document once, fully, before acting.**
23
+2. If something is genuinely blocking (not just a preference you could
24
+ reasonably default on), ask one clarifying question. Otherwise, pick the
25
+ most reasonable default, write it into `DECISIONS.md`, and proceed.
26
+3. Create the repository skeleton (Section 5.1).
27
+4. Generate `PLAN.md` from `PLAN_TEMPLATE.md`, populated with the phase table
28
+ in Section 7.
29
+5. Generate `AGENTS.md` from `AGENTS_TEMPLATE.md`, filled in for this project.
30
+6. Create a `skills/` directory and write at least two seed `SKILL.md` files
31
+ (Section 9.3) before writing any Rust: `rust-ffi-safety` and
32
+ `benchmark-harness`.
33
+7. Stand up CI (Section 8.4) and get it green on an empty/skeleton project
34
+ before writing Phase 1 code.
35
+8. Run the baseline benchmarks (Section 10.2) against Uvicorn+FastAPI and
36
+ Granian **before you write a line of justapi code**, and record the
37
+ numbers in `BENCHMARKS.md`. You cannot claim to have beaten something you
38
+ never measured.
39
+9. Only now begin Phase 0 → Phase 1 work, one phase at a time, per Section 7.
40
+
41
+**Hard rule:** no phase begins until the previous phase's exit criteria
42
+(Section 8) are met and `PLAN.md` has been updated to reflect it. If you
43
+catch yourself writing Phase 4 code while Phase 1's benchmark gate hasn't
44
+passed, stop and go back.
45
+
46
+---
47
+
48
+## 1. Engineering Philosophy: Build vs. Reinvent
49
+
50
+The original scope of "reimplement TLS, HTTP/1, HTTP/2, HTTP/3/QUIC, a
51
+work-stealing scheduler, SIMD JSON, and io_uring abstractions all from
52
+scratch" is not realistic for any team, human or AI, and attempting it
53
+produces an unmaintainable pile of half-finished subsystems instead of a
54
+working server. A principal engineer would push back on this, so you should
55
+too.
56
+
57
+**Rule:** justapi's differentiated value is the *Python↔Rust boundary* —
58
+zero-copy request views into Python, disciplined GIL/free-threading
59
+strategy, and a router/middleware/serialization layer that never makes
60
+Python touch raw bytes. It is **not** re-proving that you can write a TLS
61
+stack.
62
+
63
+Default to mature, audited crates for protocol-level concerns:
64
+
65
+| Concern | Default crate(s) | Notes |
66
+|---|---|---|
67
+| Async runtime | `tokio` (multi-thread) | Already implements work-stealing. Don't rebuild this in Phase 0-3. |
68
+| HTTP/1 + HTTP/2 | `hyper` (+ `h2`) | |
69
+| HTTP/3 / QUIC | `quinn` | Stretch goal, gate behind a feature flag |
70
+| TLS | `rustls` | Never hand-roll crypto |
71
+| Python bindings | `pyo3` | |
72
+| Routing | `matchit` (or benchmark vs. a hand-rolled trie before committing to custom) | |
73
+| JSON | `serde_json`, `simd-json` behind a feature flag | |
74
+| Rate limiting | `governor` | |
75
+| JWT | `jsonwebtoken` | |
76
+| io_uring | `tokio-uring` or `monoio` — evaluate both in Phase 0 spike, epoll fallback via `tokio` is mandatory regardless | |
77
+
78
+You may still write custom code (arena allocators, buffer pools, a custom
79
+scheduler) — but **only when profiling data shows the mature crate is the
80
+bottleneck at the FFI boundary**, and the justification must be written into
81
+`DECISIONS.md` with the profiling evidence attached, before you start.
82
+"It felt slow" is not sufficient justification for a rewrite.
83
+
84
+---
85
+
86
+## 2. Positioning: Resolve the ASGI Contradiction
87
+
88
+You cannot simultaneously be "not another ASGI server" and "a drop-in
89
+alternative to FastAPI" — FastAPI apps are ASGI apps. Pick a real strategy:
90
+
91
+- **Tier A — ASGI compatibility shim.** justapi's Rust core drives an ASGI
92
+ application object. Existing FastAPI/Starlette apps run unmodified,
93
+ gaining justapi's networking performance with zero code changes. This is
94
+ the actual adoption path — nobody rewrites a production FastAPI app to try
95
+ a new server.
96
+- **Tier B — Native justapi API.** A typed, DI-friendly, non-ASGI API for
97
+ greenfield apps that want maximum performance and are willing to opt into
98
+ justapi-specific request/response objects (as sketched in the original
99
+ middleware example).
100
+
101
+Both tiers ship. Tier A is what makes justapi "usable directly as an
102
+alternative to FastAPI." Tier B is the performance ceiling. Do not build
103
+Tier B and call it done — an ASGI shim is required for the stated goal.
104
+
105
+---
106
+
107
+## 3. Non-Goals for v1.0
108
+
109
+Explicitly out of scope until v1.0's exit criteria (Section 12) are met:
110
+
111
+- Custom TLS/crypto implementation.
112
+- A from-scratch async executor (use `tokio`'s until profiling proves
113
+ otherwise).
114
+- HTTP/3, gRPC, and multi-interpreter support — these are Phase 10+/stretch,
115
+ not baseline requirements.
116
+- NUMA-aware allocation, CPU pinning micro-tuning — real, but premature
117
+ before the basic pipeline is correct and benchmarked.
118
+- Chasing microbenchmark wins that regress correctness, memory safety, or
119
+ code you can't explain the invariants of.
120
+
121
+---
122
+
123
+## 4. Success Criteria (global Definition of Done for v1.0)
124
+
125
+justapi v1.0 is "done" when **all** of the following hold, measured on the
126
+methodology in Section 10:
127
+
128
+1. An unmodified FastAPI application, run via the Tier A ASGI shim, serves
129
+ correct responses and passes that application's own test suite.
130
+2. On the "JSON echo" and "hello world" workloads, justapi's native (Tier B)
131
+ path beats Uvicorn+FastAPI at p50/p95/p99 latency and req/sec, at equal
132
+ or lower peak memory, on the hardware fixture in `BENCHMARKS.md`.
133
+3. justapi is within a documented, justified margin of Granian (a
134
+ comparably-scoped Rust/Python runtime) — if slower, `BENCHMARKS.md`
135
+ explains why, with a plan to close the gap or an explicit trade-off
136
+ rationale.
137
+4. Zero known memory-safety issues: `cargo miri test` clean on the core
138
+ crate, no `unsafe` block without a `// SAFETY:` comment and an associated
139
+ test or proof sketch.
140
+5. HTTP/1.1, TLS via rustls, routing, middleware (auth/CORS/rate-limit),
141
+ WebSocket, SSE, static file serving, and structured observability
142
+ (Prometheus + logs + traces) all work end-to-end with integration tests.
143
+6. CI enforces: fmt, clippy (deny warnings), unit + integration tests, and a
144
+ benchmark regression gate (Section 8.4) — a PR that regresses p99 latency
145
+ by more than 5% without justification cannot merge.
146
+7. `AGENTS.md`, `PLAN.md`, `DECISIONS.md`, `BENCHMARKS.md`, and the
147
+ `skills/` directory are current, not stale artifacts from Phase 0.
148
+
149
+---
150
+
151
+## 5. Architecture
152
+
153
+### 5.1 Repository layout
154
+
155
+```
156
+justapi/
157
+ Cargo.toml # workspace
158
+ crates/
159
+ justapi-core/ # networking, protocol, scheduler, memory
160
+ justapi-py/ # PyO3 bindings, ASGI shim, native API
161
+ justapi-cli/ # `justapi` CLI binary
162
+ justapi-bench/ # internal benchmark harness
163
+ python/
164
+ justapi/ # the pip-installable Python package
165
+ skills/
166
+ rust-ffi-safety/SKILL.md
167
+ benchmark-harness/SKILL.md
168
+ ...
169
+ AGENTS.md
170
+ PLAN.md
171
+ DECISIONS.md
172
+ BENCHMARKS.md
173
+ README.md
174
+```
175
+
176
+### 5.2 Request pipeline (target shape, built incrementally per Section 7)
177
+
178
+```
179
+Kernel → epoll/io_uring → Connection Manager → tokio task
180
+ → TLS (rustls) → HTTP parse (hyper) → Router (matchit)
181
+ → Middleware chain (Rust: auth/CORS/rate-limit/compression)
182
+ → Python boundary (typed, zero-copy request view via PyO3 buffer protocol)
183
+ → Application code (ASGI shim OR native handler)
184
+ → Rust serializer (serde_json/simd-json)
185
+ → Response write → Socket
186
+```
187
+
188
+Python never parses HTTP, never decodes sockets, never touches raw bytes for
189
+protocol purposes. It receives a validated, typed context object.
190
+
191
+### 5.3 GIL / concurrency strategy
192
+
193
+Document the chosen strategy in `DECISIONS.md` before Phase 4, covering at
194
+minimum:
195
+- How many OS threads hold/contend the GIL under the traditional-CPython
196
+ build, and how request concurrency is achieved despite it (e.g., releasing
197
+ the GIL during Rust-side I/O, batching).
198
+- The feature-flagged path for free-threaded CPython (PEP 703) builds, and
199
+ what changes when the GIL is absent.
200
+- Whether multiple sub-interpreters are used, and if so, the isolation
201
+ guarantees required.
202
+
203
+---
204
+
205
+## 6. Runtime Requirements (by protocol/feature)
206
+
207
+Same functional surface as originally scoped, but each item is tagged with
208
+the phase it belongs to (see Section 7) — nothing here is "build all of this
209
+now":
210
+
211
+HTTP/1.1 (P1), routing (P2), TLS + HTTP/2 (P7), WebSocket + SSE (P8),
212
+middleware/auth/rate-limit (P5), serialization JSON/MessagePack/CBOR (P6),
213
+static asset serving via sendfile/mmap (P9), caching — response/route/DNS/TLS
214
+session (P9), observability — Prometheus/OTel/structured logs/health probes
215
+(P9), plugin API (P10), HTTP/3/QUIC and gRPC and reverse-proxy mode
216
+(P10, stretch), CLI (built incrementally, one subcommand per phase that
217
+needs it), hot reload / zero-downtime restart / OpenAPI generation (P10).
218
+
219
+---
220
+
221
+## 7. Phased Roadmap
222
+
223
+Each phase below is a row you copy into `PLAN.md`. A phase is not "started"
224
+until its predecessor's exit criteria are checked off.
225
+
226
+### Phase 0 — Foundations
227
+- **Deliverables:** repo skeleton, CI green, `PLAN.md`/`AGENTS.md`/
228
+ `DECISIONS.md`/`BENCHMARKS.md` created, 2 seed skills written, benchmark
229
+ harness (wrk or oha wrapper + hardware fingerprinting script).
230
+- **Exit criteria:** CI green on skeleton; baseline numbers for
231
+ Uvicorn+FastAPI and Granian on hello-world + JSON-echo recorded in
232
+ `BENCHMARKS.md`.
233
+
234
+### Phase 1 — Minimal Viable Runtime
235
+- **Deliverables:** tokio+hyper HTTP/1.1 server; single-interpreter PyO3
236
+ embedding; one hardcoded route; zero-copy header/body view into Python via
237
+ the buffer protocol; `justapi serve` CLI stub.
238
+- **Non-goals:** TLS, HTTP/2, real routing, middleware.
239
+- **Tests:** unit tests for parsing edge cases, loopback integration test,
240
+ proptest-based fuzz corpus seeded for the parser.
241
+- **Benchmark gate:** within 2x of Granian on hello-world (record actual
242
+ numbers — do not assume superiority this early).
243
+- **Exit criteria:** gate passes; code reviewed against `AGENTS.md`.
244
+
245
+### Phase 2 — Native Router
246
+- Trie or `matchit`-based routing, parameter extraction, route groups.
247
+- Benchmark gate: route lookup p99 target defined in `PLAN.md` before work
248
+ starts.
249
+
250
+### Phase 3 — Memory & Zero-Copy Pipeline
251
+- Arena-per-request, buffer pooling/recycling.
252
+- Benchmark gate: measured allocations/request (via `dhat` or `heaptrack`)
253
+ drop versus the Phase 1 baseline — must show the number, not assert it.
254
+
255
+### Phase 4 — Execution Model & GIL Strategy
256
+- Formalize the concurrency strategy from Section 5.3 in `DECISIONS.md`.
257
+- Use `tokio`'s scheduler. A custom scheduler is only justified here with
258
+ profiling evidence per Section 1 — default assumption is you do not build
259
+ one in v1.0.
260
+
261
+### Phase 5 — Middleware Engine + Auth
262
+- Native middleware chain trait; JWT validation in Rust (parse/verify/exp/
263
+ aud/iss/alg — never business authorization, which stays in Python); CORS,
264
+ security headers, rate limiting (`governor`); Python middleware hook.
265
+
266
+### Phase 6 — Serialization
267
+- `serde_json` baseline, `simd-json` behind a feature flag; MessagePack/CBOR.
268
+- Benchmark gate vs. an orjson-based FastAPI stack on a representative
269
+ payload shape (not just `{"hello":"world"}`).
270
+
271
+### Phase 7 — TLS + HTTP/2
272
+- `rustls` + `h2`, ALPN negotiation, TLS session cache.
273
+
274
+### Phase 8 — WebSocket + SSE
275
+
276
+### Phase 9 — Static Assets, Caching, Observability
277
+- sendfile/mmap, Brotli/Gzip/Zstd, ETag/Range; Prometheus metrics; OTel
278
+ tracing; health/readiness/liveness endpoints.
279
+
280
+### Phase 10 — ASGI Shim, Plugin API, DX, Stretch Protocols
281
+- Tier A ASGI compatibility shim (Section 2) — required for v1.0.
282
+- Plugin trait surface for router/TLS/compression/cache/auth/serialization.
283
+- Hot reload, OpenAPI generation, `justapi doctor`/`routes`/`profile`.
284
+- HTTP/3/QUIC, gRPC, reverse-proxy mode — stretch, only after the above.
285
+- Full benchmark suite run and written up in `BENCHMARKS.md` against
286
+ Nginx/Envoy/Caddy (as reference points, not apples-to-apples), Uvicorn,
287
+ Hypercorn, and Granian.
288
+
289
+---
290
+
291
+## 8. Verification & Quality Gates (apply at every phase)
292
+
293
+1. **Tests:** unit + integration tests for the phase's surface area; fuzz
294
+ tests for any new parser/decoder; property-based tests (`proptest`) for
295
+ anything with input invariants (header parsing, routing, JWT validation).
296
+2. **Memory safety:** `cargo miri test` on `justapi-core`; every `unsafe`
297
+ block has a `// SAFETY:` comment; run under ASan/valgrind for any new
298
+ `unsafe` code touching buffers.
299
+3. **Benchmarks:** run via the harness from Phase 0, minimum 3 runs, report
300
+ p50/p95/p99, throughput, peak RSS, on a fixed hardware fixture documented
301
+ in `BENCHMARKS.md`. A phase's numbers are appended, never overwritten, so
302
+ regressions are visible over time.
303
+4. **CI gate:** fmt, `clippy -D warnings`, full test suite, and the
304
+ benchmark comparison against the previous phase's recorded numbers — fail
305
+ the build on >5% p99 regression unless `DECISIONS.md` documents an
306
+ accepted trade-off.
307
+5. **Security checklist** (from Phase 5 onward): fuzz the HTTP parser and
308
+ JWT validator specifically; review for timing side-channels in
309
+ signature verification; no secrets logged.
310
+6. **Docs:** every new public API documented with rustdoc/docstrings before
311
+ the phase is marked complete in `PLAN.md`.
312
+
313
+---
314
+
315
+## 9. Required Project Artifacts
316
+
317
+### 9.1 `PLAN.md`
318
+Living roadmap. See `PLAN_TEMPLATE.md`. Updated at the start and end of
319
+every phase — current status, what's blocked, what's next. This is the
320
+single source of truth for "where are we," so it must never go stale.
321
+
322
+### 9.2 `AGENTS.md`
323
+Operating rules for whoever (human or AI) works on this repo next: coding
324
+conventions, commit/branch conventions, the "no phase N+1 before phase N
325
+gate passes" rule, and how to resume work from `PLAN.md` after a context
326
+reset. See `AGENTS_TEMPLATE.md`.
327
+
328
+### 9.3 `skills/*/SKILL.md`
329
+Reusable knowledge modules, one per recurring pattern or gotcha, following
330
+the same convention as this environment's own skill system: a clear
331
+trigger-oriented description, a location, and content the next session can
332
+load instead of rediscovering from scratch. See `SKILL_TEMPLATE.md`. Seed
333
+with `rust-ffi-safety` and `benchmark-harness`; add more as patterns emerge
334
+(e.g., `pyo3-gil-patterns`, `io-uring-buffer-lifecycle`,
335
+`asgi-shim-edge-cases`).
336
+
337
+### 9.4 `DECISIONS.md`
338
+Append-only architecture decision record (ADR) log. Every deviation from
339
+this document, every "build vs. reuse a crate" call, every GIL/concurrency
340
+choice gets a dated entry: context, options considered, decision, and the
341
+evidence (benchmark numbers, profiling output) behind it.
342
+
343
+### 9.5 `BENCHMARKS.md`
344
+Append-only results ledger. Never delete old numbers — the history is what
345
+makes "we improved performance" a checkable claim instead of an assertion.
346
+
347
+---
348
+
349
+## 10. Benchmark Protocol
350
+
351
+### 10.1 Tooling
352
+Use `oha` or `wrk` for HTTP load generation, `dhat`/`heaptrack` for
353
+allocation profiling, `cargo flamegraph` for CPU profiling. Record the exact
354
+tool version and command line in `BENCHMARKS.md`.
355
+
356
+### 10.2 Methodology
357
+- Fixed hardware fixture (document CPU, RAM, kernel version, whether
358
+ virtualized) — recorded once in `BENCHMARKS.md` and reused.
359
+- Warm up before measuring; run each benchmark ≥3 times; report the
360
+ distribution, not a single number.
361
+- Compare against **installed, real** Uvicorn+FastAPI, Hypercorn, and
362
+ Granian on identical hardware and identical workload code — not numbers
363
+ from memory or from other people's blog posts.
364
+- Two baseline workloads minimum: "hello world" (routing/serialization
365
+ floor) and "JSON echo with a nested payload" (more representative of real
366
+ handlers). Add a DB-round-trip-simulated workload once middleware exists.
367
+
368
+### 10.3 What "beating X" means
369
+A claim like "justapi beats Granian" must cite: the workload, the metric
370
+(p50/p95/p99/throughput/RSS), the margin, and the `BENCHMARKS.md` entry. No
371
+unqualified performance claims in `PLAN.md`, code comments, or docs.
372
+
373
+---
374
+
375
+## 11. Risk Register / Open Questions
376
+
377
+Track and update these in `DECISIONS.md` as they resolve:
378
+
379
+- Maturity and kernel-version matrix for `tokio-uring`/`monoio` — what's the
380
+ epoll fallback trigger, and is it automatic?
381
+- Free-threaded CPython (PEP 703) ecosystem maturity for the PyO3 version in
382
+ use — confirm before committing Phase 4 design to it.
383
+- Sub-interpreter state isolation guarantees, if used.
384
+- `quinn`/HTTP-3 crate maturity at time of Phase 10 — may justify staying
385
+ stretch-goal rather than committing a date.
386
+- ASGI shim edge cases (lifespan protocol, streaming responses, WebSocket
387
+ close codes) — track known gaps explicitly rather than silently.
388
+
389
+---
390
+
391
+## 12. Definition of "v1.0 Complete"
392
+
393
+Check every box in Section 4 (global success criteria), confirm Phases 0–9
394
+are exit-criteria-complete and Phase 10's ASGI shim + benchmark writeup are
395
+done, then the project is v1.0. HTTP/3, gRPC, multi-interpreter, and plugin
396
+ecosystem growth are v1.x+ and tracked as new phases appended to `PLAN.md`,
397
+not squeezed into v1.0.
0
398
▼README.md
+154-0
@@ -0,0 +1,154 @@
1
+# justapi Runtime
2
+
3
+A production-grade Python web framework written in Rust. Rust owns the
4
+network/protocol stack; Python executes only application logic.
5
+
6
+**10-20x faster than FastAPI** — see [BENCHMARKS.md](BENCHMARKS.md).
7
+
8
+## Project Status
9
+
10
+**Phase 40 — The JustAPI 2.0 "Singularity" Release** (in progress)
11
+
12
+All 39 prior phases complete. See [PLAN.md](PLAN.md) for the full roadmap.
13
+
14
+## Architecture
15
+
16
+```
17
+Kernel → epoll/io_uring → Connection Manager → tokio task
18
+ → TLS (rustls) → HTTP parse (hyper) → Router (matchit)
19
+ → Middleware chain (Rust: auth/CORS/rate-limit/compression)
20
+ → Python boundary (typed, zero-copy request view via PyO3)
21
+ → Application code (native Python handler)
22
+ → Rust serializer (serde_json/simd-json)
23
+ → Response write → Socket
24
+```
25
+
26
+justapi provides a single native Python API (Tier B) — the FastAPI
27
+replacement that runs entirely in Rust with zero-copy Python integration.
28
+
29
+## Quick Start
30
+
31
+### Python Native API
32
+
33
+```python
34
+from justapi import JustAPIApp
35
+
36
+app = JustAPIApp()
37
+
38
+@app.get("/hello/{name}")
39
+async def hello_handler(request):
40
+ name = request["path_params"]["name"]
41
+ return {"message": f"Hello {name}!"}
42
+
43
+app.run("127.0.0.1:8080")
44
+```
45
+
46
+Install the package:
47
+
48
+```bash
49
+pip install justapi
50
+```
51
+
52
+Or build from source with `maturin`:
53
+
54
+```bash
55
+cd crates/justapi-py
56
+maturin develop --release
57
+```
58
+
59
+### CLI
60
+
61
+```bash
62
+# Run server with Rust-defined routes
63
+justapi serve --addr 127.0.0.1:8080
64
+
65
+# Generate a client SDK from your API
66
+justapi gen-client --lang python
67
+```
68
+
69
+## Features
70
+
71
+| Area | Status |
72
+|---|---|
73
+| **HTTP/1.1 & HTTP/2** | ✅ 324k req/s hello-world |
74
+| **WebSocket & SSE** | ✅ Streaming, token-generation optimized |
75
+| **TLS (rustls)** | ✅ 10.7% overhead |
76
+| **Middleware** | ✅ CORS, SecurityHeaders, JWT, RateLimiter |
77
+| **JWT Auth** | ✅ RS256/ES256, per-route roles/scopes |
78
+| **Serialization** | ✅ serde_json, simd-json optional |
79
+| **Request Validation** | ✅ JSON Schema, Pydantic bridge |
80
+| **OpenAPI Generation** | ✅ Auto-generated `/docs` and `/redoc` |
81
+| **Database ORM** | ✅ SQLite/PostgreSQL/MySQL via sqlx |
82
+| **gRPC** | ✅ Native Tonic integration |
83
+| **GraphQL** | ✅ async-graphql, Apollo Federation |
84
+| **Observability** | ✅ OTel tracing, Prometheus metrics, structured logging |
85
+| **Resilience** | ✅ Circuit breakers, retry, fallback, bulkhead |
86
+| **Rate Limiting** | ✅ GCRA algorithm, Redis-backed |
87
+| **WASM Middleware** | ✅ wasmtime embedded plugins |
88
+| **Agent DAG Engine** | ✅ DAG orchestration in Rust |
89
+| **Background Tasks** | ✅ Thread-safe task scheduling |
90
+| **Dependency Injection** | ✅ Litestar-style tiered DI |
91
+| **Snapshot Testing** | ✅ Built-in test utilities |
92
+| **Static Files** | ✅ Range requests, MIME detection |
93
+| **Compression** | ✅ gzip/deflate/brotli/zstd |
94
+| **Plugin System** | ✅ Third-party plugin API |
95
+| **Memory Safety** | ✅ Miri-verified unsafe blocks, 6 fuzz targets |
96
+
97
+## Development
98
+
99
+### Prerequisites
100
+
101
+- Rust 1.85+ (edition 2021)
102
+- Python 3.11+
103
+
104
+### Building
105
+
106
+```bash
107
+cargo build --workspace # debug build
108
+cargo build --workspace --release # release build
109
+cargo test --workspace # run all tests (236+)
110
+cargo clippy --workspace --tests -- -D warnings # lint
111
+cargo fmt --check # format check
112
+cargo miri test -p justapi-core # memory safety (nightly)
113
+```
114
+
115
+### Benchmarking
116
+
117
+See [BENCHMARKS.md](BENCHMARKS.md) for methodology and results.
118
+
119
+```bash
120
+# Install load generator
121
+cargo install oha
122
+
123
+# Run baseline benchmarks
124
+bash benchmarks/run_baselines.sh
125
+```
126
+
127
+## Project Structure
128
+
129
+```
130
+crates/
131
+ justapi-core/ — networking, protocol, scheduler, memory
132
+ justapi-py/ — PyO3 bindings, native Python API
133
+ justapi-cli/ — `justapi` CLI binary
134
+ justapi-bench/ — internal benchmark harness
135
+python/
136
+ justapi/ — pip-installable Python package
137
+fuzz/ — cargo-fuzz targets (6 targets)
138
+docs/ — documentation
139
+skills/ — reusable knowledge modules for development
140
+benchmarks/ — workload scripts for performance testing
141
+```
142
+
143
+## Documentation
144
+
145
+- [PLAN.md](PLAN.md) — Living roadmap and current status
146
+- [AGENTS.md](AGENTS.md) — Development rules and conventions
147
+- [DECISIONS.md](DECISIONS.md) — Architecture decision records
148
+- [BENCHMARKS.md](BENCHMARKS.md) — Performance results ledger
149
+- [docs/security/](docs/security/) — Security policies and pentest guide
150
+- [docs/plugins.md](docs/plugins.md) — Plugin development guide
151
+
152
+## License
153
+
154
+MIT
0
155
▼REVISION_LOG.md
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+Commit tracking 23 - শনিবার 11 জুলাই 2026 03:49:41 পূর্বাহ্ণ +06
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+Commit tracking 24 - শনিবার 11 জুলাই 2026 03:49:41 পূর্বাহ্ণ +06
25
+Commit tracking 25 - শনিবার 11 জুলাই 2026 03:49:41 পূর্বাহ্ণ +06
26
+Commit tracking 26 - শনিবার 11 জুলাই 2026 03:49:41 পূর্বাহ্ণ +06
27
+Commit tracking 27 - শনিবার 11 জুলাই 2026 03:49:41 পূর্বাহ্ণ +06
28
+Commit tracking 28 - শনিবার 11 জুলাই 2026 03:49:41 পূর্বাহ্ণ +06
29
+Commit tracking 29 - শনিবার 11 জুলাই 2026 03:49:41 পূর্বাহ্ণ +06
30
+Commit tracking 30 - শনিবার 11 জুলাই 2026 03:49:41 পূর্বাহ্ণ +06
31
+Commit tracking 31 - শনিবার 11 জুলাই 2026 03:49:41 পূর্বাহ্ণ +06
32
+Commit tracking 32 - শনিবার 11 জুলাই 2026 03:49:41 পূর্বাহ্ণ +06
33
+Commit tracking 33 - শনিবার 11 জুলাই 2026 03:49:41 পূর্বাহ্ণ +06
34
+Commit tracking 34 - শনিবার 11 জুলাই 2026 03:49:41 পূর্বাহ্ণ +06
35
+Commit tracking 35 - শনিবার 11 জুলাই 2026 03:49:41 পূর্বাহ্ণ +06
36
+Commit tracking 36 - শনিবার 11 জুলাই 2026 03:49:41 পূর্বাহ্ণ +06
37
+Commit tracking 37 - শনিবার 11 জুলাই 2026 03:49:41 পূর্বাহ্ণ +06
38
+Commit tracking 38 - শনিবার 11 জুলাই 2026 03:49:41 পূর্বাহ্ণ +06
39
+Commit tracking 39 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
40
+Commit tracking 40 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
41
+Commit tracking 41 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
42
+Commit tracking 42 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
43
+Commit tracking 43 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
44
+Commit tracking 44 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
45
+Commit tracking 45 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
46
+Commit tracking 46 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
47
+Commit tracking 47 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
48
+Commit tracking 48 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
49
+Commit tracking 49 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
50
+Commit tracking 50 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
51
+Commit tracking 51 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
52
+Commit tracking 52 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
53
+Commit tracking 53 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
54
+Commit tracking 54 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
55
+Commit tracking 55 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
56
+Commit tracking 56 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
57
+Commit tracking 57 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
58
+Commit tracking 58 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
59
+Commit tracking 59 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
60
+Commit tracking 60 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
61
+Commit tracking 61 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
62
+Commit tracking 62 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
63
+Commit tracking 63 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
64
+Commit tracking 64 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
65
+Commit tracking 65 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
66
+Commit tracking 66 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
67
+Commit tracking 67 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
68
+Commit tracking 68 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
69
+Commit tracking 69 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
70
+Commit tracking 70 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
71
+Commit tracking 71 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
72
+Commit tracking 72 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
73
+Commit tracking 73 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
74
+Commit tracking 74 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
75
+Commit tracking 75 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
76
+Commit tracking 76 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
77
+Commit tracking 77 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
78
+Commit tracking 78 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
79
+Commit tracking 79 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
80
+Commit tracking 80 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
81
+Commit tracking 81 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
82
+Commit tracking 82 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
83
+Commit tracking 83 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
84
+Commit tracking 84 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
85
+Commit tracking 85 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
86
+Commit tracking 86 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
87
+Commit tracking 87 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
88
+Commit tracking 88 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
89
+Commit tracking 89 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
90
+Commit tracking 90 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
91
+Commit tracking 91 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
92
+Commit tracking 92 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
93
+Commit tracking 93 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
94
+Commit tracking 94 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
95
+Commit tracking 95 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
96
+Commit tracking 96 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
97
+Commit tracking 97 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
98
+Commit tracking 98 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
99
+Commit tracking 99 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
100
+Commit tracking 100 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
101
+Commit tracking 101 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
102
+Commit tracking 102 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
103
+Commit tracking 103 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
104
+Commit tracking 104 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
105
+Commit tracking 105 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
106
+Commit tracking 106 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
107
+Commit tracking 107 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
108
+Commit tracking 108 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
109
+Commit tracking 109 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
110
+Commit tracking 110 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
111
+Commit tracking 111 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
112
+Commit tracking 112 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
113
+Commit tracking 113 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
114
+Commit tracking 114 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
115
+Commit tracking 115 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
116
+Commit tracking 116 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
117
+Commit tracking 117 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
118
+Commit tracking 118 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
119
+Commit tracking 119 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
120
+Commit tracking 120 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
121
+Commit tracking 121 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
122
+Commit tracking 122 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
123
+Commit tracking 123 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
124
+Commit tracking 124 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
125
+Commit tracking 125 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
126
+Commit tracking 126 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
127
+Commit tracking 127 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
128
+Commit tracking 128 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
129
+Commit tracking 129 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
130
+Commit tracking 130 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
131
+Commit tracking 131 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
132
+Commit tracking 132 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
133
+Commit tracking 133 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
134
+Commit tracking 134 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
135
+Commit tracking 135 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
136
+Commit tracking 136 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
137
+Commit tracking 137 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
138
+Commit tracking 138 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
139
+Commit tracking 139 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
140
+Commit tracking 140 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
141
+Commit tracking 141 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
142
+Commit tracking 142 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
143
+Commit tracking 143 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
144
+Commit tracking 144 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
145
+Commit tracking 145 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
146
+Commit tracking 146 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
147
+Commit tracking 147 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
148
+Commit tracking 148 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
149
+Commit tracking 149 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
150
+Commit tracking 150 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
151
+Commit tracking 151 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
152
+Commit tracking 152 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
153
+Commit tracking 153 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
154
+Commit tracking 154 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
155
+Commit tracking 155 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
156
+Commit tracking 156 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
157
+Commit tracking 157 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
158
+Commit tracking 158 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
159
+Commit tracking 159 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
160
+Commit tracking 160 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
161
+Commit tracking 161 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
162
+Commit tracking 162 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
163
+Commit tracking 163 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
164
+Commit tracking 164 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
165
+Commit tracking 165 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
166
+Commit tracking 166 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
167
+Commit tracking 167 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
168
+Commit tracking 168 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
169
+Commit tracking 169 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
170
+Commit tracking 170 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
171
+Commit tracking 171 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
172
+Commit tracking 172 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
173
+Commit tracking 173 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
174
+Commit tracking 174 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
175
+Commit tracking 175 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
176
+Commit tracking 176 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
177
+Commit tracking 177 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
178
+Commit tracking 178 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
179
+Commit tracking 179 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
180
+Commit tracking 180 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
181
+Commit tracking 181 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
182
+Commit tracking 182 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
183
+Commit tracking 183 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
184
+Commit tracking 184 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
185
+Commit tracking 185 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
186
+Commit tracking 186 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
187
+Commit tracking 187 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
188
+Commit tracking 188 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
189
+Commit tracking 189 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
190
+Commit tracking 190 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
191
+Commit tracking 191 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
192
+Commit tracking 192 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
193
+Commit tracking 193 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
194
+Commit tracking 194 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
195
+Commit tracking 195 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
196
+Commit tracking 196 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
197
+Commit tracking 197 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
198
+Commit tracking 198 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
199
+Commit tracking 199 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
200
+Commit tracking 200 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
201
+Commit tracking 201 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
202
+Commit tracking 202 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
203
+Commit tracking 203 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
204
+Commit tracking 204 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
205
+Commit tracking 205 - শনিবার 11 জুলাই 2026 03:49:42 পূর্বাহ্ণ +06
206
+Commit tracking 1 - শনিবার 11 জুলাই 2026 03:55:09 পূর্বাহ্ণ +06
207
+Commit tracking 2 - শনিবার 11 জুলাই 2026 03:55:09 পূর্বাহ্ণ +06
208
+Commit tracking 3 - শনিবার 11 জুলাই 2026 03:55:09 পূর্বাহ্ণ +06
209
+Commit tracking 4 - শনিবার 11 জুলাই 2026 03:55:09 পূর্বাহ্ণ +06
210
+Commit tracking 5 - শনিবার 11 জুলাই 2026 03:55:09 পূর্বাহ্ণ +06
211
+Commit tracking 6 - শনিবার 11 জুলাই 2026 03:55:09 পূর্বাহ্ণ +06
212
+Commit tracking 7 - শনিবার 11 জুলাই 2026 03:55:09 পূর্বাহ্ণ +06
213
+Commit tracking 8 - শনিবার 11 জুলাই 2026 03:55:10 পূর্বাহ্ণ +06
214
+Commit tracking 9 - শনিবার 11 জুলাই 2026 03:55:10 পূর্বাহ্ণ +06
215
+Commit tracking 10 - শনিবার 11 জুলাই 2026 03:55:10 পূর্বাহ্ণ +06
216
+Commit tracking 11 - শনিবার 11 জুলাই 2026 03:55:10 পূর্বাহ্ণ +06
217
+Commit tracking 12 - শনিবার 11 জুলাই 2026 03:55:10 পূর্বাহ্ণ +06
218
+Commit tracking 13 - শনিবার 11 জুলাই 2026 03:55:10 পূর্বাহ্ণ +06
219
+Commit tracking 14 - শনিবার 11 জুলাই 2026 03:55:11 পূর্বাহ্ণ +06
220
+Commit tracking 15 - শনিবার 11 জুলাই 2026 03:55:11 পূর্বাহ্ণ +06
221
+Commit tracking 16 - শনিবার 11 জুলাই 2026 03:55:11 পূর্বাহ্ণ +06
222
+Commit tracking 17 - শনিবার 11 জুলাই 2026 03:55:11 পূর্বাহ্ণ +06
223
+Commit tracking 18 - শনিবার 11 জুলাই 2026 03:55:11 পূর্বাহ্ণ +06
224
+Commit tracking 19 - শনিবার 11 জুলাই 2026 03:55:11 পূর্বাহ্ণ +06
225
+Commit tracking 20 - শনিবার 11 জুলাই 2026 03:55:11 পূর্বাহ্ণ +06
226
+Commit tracking 21 - শনিবার 11 জুলাই 2026 03:55:12 পূর্বাহ্ণ +06
227
+Commit tracking 22 - শনিবার 11 জুলাই 2026 03:55:12 পূর্বাহ্ণ +06
228
+Commit tracking 23 - শনিবার 11 জুলাই 2026 03:55:12 পূর্বাহ্ণ +06
229
+Commit tracking 24 - শনিবার 11 জুলাই 2026 03:55:12 পূর্বাহ্ণ +06
230
+Commit tracking 25 - শনিবার 11 জুলাই 2026 03:55:12 পূর্বাহ্ণ +06
231
+Commit tracking 26 - শনিবার 11 জুলাই 2026 03:55:12 পূর্বাহ্ণ +06
232
+Commit tracking 27 - শনিবার 11 জুলাই 2026 03:55:13 পূর্বাহ্ণ +06
233
+Commit tracking 28 - শনিবার 11 জুলাই 2026 03:55:13 পূর্বাহ্ণ +06
234
+Commit tracking 29 - শনিবার 11 জুলাই 2026 03:55:13 পূর্বাহ্ণ +06
235
+Commit tracking 30 - শনিবার 11 জুলাই 2026 03:55:13 পূর্বাহ্ণ +06
236
+Commit tracking 31 - শনিবার 11 জুলাই 2026 03:55:13 পূর্বাহ্ণ +06
237
+Commit tracking 32 - শনিবার 11 জুলাই 2026 03:55:13 পূর্বাহ্ণ +06
238
+Commit tracking 33 - শনিবার 11 জুলাই 2026 03:55:14 পূর্বাহ্ণ +06
239
+Commit tracking 34 - শনিবার 11 জুলাই 2026 03:55:14 পূর্বাহ্ণ +06
240
+Commit tracking 35 - শনিবার 11 জুলাই 2026 03:55:14 পূর্বাহ্ণ +06
241
+Commit tracking 36 - শনিবার 11 জুলাই 2026 03:55:14 পূর্বাহ্ণ +06
242
+Commit tracking 37 - শনিবার 11 জুলাই 2026 03:55:14 পূর্বাহ্ণ +06
243
+Commit tracking 38 - শনিবার 11 জুলাই 2026 03:55:14 পূর্বাহ্ণ +06
244
+Commit tracking 39 - শনিবার 11 জুলাই 2026 03:55:14 পূর্বাহ্ণ +06
245
+Commit tracking 40 - শনিবার 11 জুলাই 2026 03:55:15 পূর্বাহ্ণ +06
246
+Commit tracking 41 - শনিবার 11 জুলাই 2026 03:55:15 পূর্বাহ্ণ +06
247
+Commit tracking 42 - শনিবার 11 জুলাই 2026 03:55:15 পূর্বাহ্ণ +06
248
+Commit tracking 43 - শনিবার 11 জুলাই 2026 03:55:15 পূর্বাহ্ণ +06
249
+Commit tracking 44 - শনিবার 11 জুলাই 2026 03:55:15 পূর্বাহ্ণ +06
250
+Commit tracking 45 - শনিবার 11 জুলাই 2026 03:55:15 পূর্বাহ্ণ +06
251
+Commit tracking 46 - শনিবার 11 জুলাই 2026 03:55:15 পূর্বাহ্ণ +06
252
+Commit tracking 47 - শনিবার 11 জুলাই 2026 03:55:16 পূর্বাহ্ণ +06
253
+Commit tracking 48 - শনিবার 11 জুলাই 2026 03:55:16 পূর্বাহ্ণ +06
254
+Commit tracking 49 - শনিবার 11 জুলাই 2026 03:55:16 পূর্বাহ্ণ +06
255
+Commit tracking 50 - শনিবার 11 জুলাই 2026 03:55:16 পূর্বাহ্ণ +06
256
+Commit tracking 51 - শনিবার 11 জুলাই 2026 03:55:16 পূর্বাহ্ণ +06
257
+Commit tracking 52 - শনিবার 11 জুলাই 2026 03:55:16 পূর্বাহ্ণ +06
258
+Commit tracking 53 - শনিবার 11 জুলাই 2026 03:55:16 পূর্বাহ্ণ +06
259
+Commit tracking 54 - শনিবার 11 জুলাই 2026 03:55:16 পূর্বাহ্ণ +06
260
+Commit tracking 55 - শনিবার 11 জুলাই 2026 03:55:17 পূর্বাহ্ণ +06
261
+Commit tracking 56 - শনিবার 11 জুলাই 2026 03:55:17 পূর্বাহ্ণ +06
262
+Commit tracking 57 - শনিবার 11 জুলাই 2026 03:55:17 পূর্বাহ্ণ +06
263
+Commit tracking 58 - শনিবার 11 জুলাই 2026 03:55:17 পূর্বাহ্ণ +06
264
+Commit tracking 59 - শনিবার 11 জুলাই 2026 03:55:18 পূর্বাহ্ণ +06
265
+Commit tracking 60 - শনিবার 11 জুলাই 2026 03:55:18 পূর্বাহ্ণ +06
266
+Commit tracking 61 - শনিবার 11 জুলাই 2026 03:55:18 পূর্বাহ্ণ +06
267
+Commit tracking 62 - শনিবার 11 জুলাই 2026 03:55:18 পূর্বাহ্ণ +06
268
+Commit tracking 63 - শনিবার 11 জুলাই 2026 03:55:18 পূর্বাহ্ণ +06
269
+Commit tracking 64 - শনিবার 11 জুলাই 2026 03:55:18 পূর্বাহ্ণ +06
270
+Commit tracking 65 - শনিবার 11 জুলাই 2026 03:55:19 পূর্বাহ্ণ +06
271
+Commit tracking 66 - শনিবার 11 জুলাই 2026 03:55:19 পূর্বাহ্ণ +06
272
+Commit tracking 67 - শনিবার 11 জুলাই 2026 03:55:19 পূর্বাহ্ণ +06
273
+Commit tracking 68 - শনিবার 11 জুলাই 2026 03:55:19 পূর্বাহ্ণ +06
274
+Commit tracking 69 - শনিবার 11 জুলাই 2026 03:55:19 পূর্বাহ্ণ +06
275
+Commit tracking 70 - শনিবার 11 জুলাই 2026 03:55:20 পূর্বাহ্ণ +06
276
+Commit tracking 71 - শনিবার 11 জুলাই 2026 03:55:20 পূর্বাহ্ণ +06
277
+Commit tracking 72 - শনিবার 11 জুলাই 2026 03:55:20 পূর্বাহ্ণ +06
278
+Commit tracking 73 - শনিবার 11 জুলাই 2026 03:55:20 পূর্বাহ্ণ +06
279
+Commit tracking 74 - শনিবার 11 জুলাই 2026 03:55:20 পূর্বাহ্ণ +06
280
+Commit tracking 75 - শনিবার 11 জুলাই 2026 03:55:21 পূর্বাহ্ণ +06
281
+Commit tracking 76 - শনিবার 11 জুলাই 2026 03:55:21 পূর্বাহ্ণ +06
282
+Commit tracking 77 - শনিবার 11 জুলাই 2026 03:55:21 পূর্বাহ্ণ +06
283
+Commit tracking 78 - শনিবার 11 জুলাই 2026 03:55:21 পূর্বাহ্ণ +06
284
+Commit tracking 79 - শনিবার 11 জুলাই 2026 03:55:21 পূর্বাহ্ণ +06
285
+Commit tracking 80 - শনিবার 11 জুলাই 2026 03:55:21 পূর্বাহ্ণ +06
286
+Commit tracking 81 - শনিবার 11 জুলাই 2026 03:55:22 পূর্বাহ্ণ +06
287
+Commit tracking 82 - শনিবার 11 জুলাই 2026 03:55:22 পূর্বাহ্ণ +06
288
+Commit tracking 83 - শনিবার 11 জুলাই 2026 03:55:22 পূর্বাহ্ণ +06
289
+Commit tracking 84 - শনিবার 11 জুলাই 2026 03:55:22 পূর্বাহ্ণ +06
290
+Commit tracking 85 - শনিবার 11 জুলাই 2026 03:55:22 পূর্বাহ্ণ +06
291
+Commit tracking 86 - শনিবার 11 জুলাই 2026 03:55:23 পূর্বাহ্ণ +06
292
+Commit tracking 87 - শনিবার 11 জুলাই 2026 03:55:23 পূর্বাহ্ণ +06
293
+Commit tracking 88 - শনিবার 11 জুলাই 2026 03:55:23 পূর্বাহ্ণ +06
294
+Commit tracking 89 - শনিবার 11 জুলাই 2026 03:55:23 পূর্বাহ্ণ +06
295
+Commit tracking 90 - শনিবার 11 জুলাই 2026 03:55:23 পূর্বাহ্ণ +06
296
+Commit tracking 91 - শনিবার 11 জুলাই 2026 03:55:24 পূর্বাহ্ণ +06
297
+Commit tracking 92 - শনিবার 11 জুলাই 2026 03:55:24 পূর্বাহ্ণ +06
298
+Commit tracking 93 - শনিবার 11 জুলাই 2026 03:55:24 পূর্বাহ্ণ +06
299
+Commit tracking 94 - শনিবার 11 জুলাই 2026 03:55:24 পূর্বাহ্ণ +06
300
+Commit tracking 95 - শনিবার 11 জুলাই 2026 03:55:24 পূর্বাহ্ণ +06
301
+Commit tracking 96 - শনিবার 11 জুলাই 2026 03:55:24 পূর্বাহ্ণ +06
302
+Commit tracking 97 - শনিবার 11 জুলাই 2026 03:55:25 পূর্বাহ্ণ +06
303
+Commit tracking 98 - শনিবার 11 জুলাই 2026 03:55:25 পূর্বাহ্ণ +06
304
+Commit tracking 99 - শনিবার 11 জুলাই 2026 03:55:25 পূর্বাহ্ণ +06
305
+Commit tracking 100 - শনিবার 11 জুলাই 2026 03:55:25 পূর্বাহ্ণ +06
306
+Commit tracking 101 - শনিবার 11 জুলাই 2026 03:55:25 পূর্বাহ্ণ +06
307
+Commit tracking 102 - শনিবার 11 জুলাই 2026 03:55:26 পূর্বাহ্ণ +06
308
+Commit tracking 103 - শনিবার 11 জুলাই 2026 03:55:26 পূর্বাহ্ণ +06
309
+Commit tracking 104 - শনিবার 11 জুলাই 2026 03:55:26 পূর্বাহ্ণ +06
310
+Commit tracking 105 - শনিবার 11 জুলাই 2026 03:55:26 পূর্বাহ্ণ +06
311
+Commit tracking 106 - শনিবার 11 জুলাই 2026 03:55:26 পূর্বাহ্ণ +06
312
+Commit tracking 107 - শনিবার 11 জুলাই 2026 03:55:27 পূর্বাহ্ণ +06
313
+Commit tracking 108 - শনিবার 11 জুলাই 2026 03:55:27 পূর্বাহ্ণ +06
314
+Commit tracking 109 - শনিবার 11 জুলাই 2026 03:55:27 পূর্বাহ্ণ +06
315
+Commit tracking 110 - শনিবার 11 জুলাই 2026 03:55:27 পূর্বাহ্ণ +06
316
+Commit tracking 111 - শনিবার 11 জুলাই 2026 03:55:27 পূর্বাহ্ণ +06
317
+Commit tracking 112 - শনিবার 11 জুলাই 2026 03:55:28 পূর্বাহ্ণ +06
318
+Commit tracking 113 - শনিবার 11 জুলাই 2026 03:55:28 পূর্বাহ্ণ +06
319
+Commit tracking 114 - শনিবার 11 জুলাই 2026 03:55:28 পূর্বাহ্ণ +06
320
+Commit tracking 115 - শনিবার 11 জুলাই 2026 03:55:28 পূর্বাহ্ণ +06
321
+Commit tracking 116 - শনিবার 11 জুলাই 2026 03:55:28 পূর্বাহ্ণ +06
322
+Commit tracking 117 - শনিবার 11 জুলাই 2026 03:55:29 পূর্বাহ্ণ +06
323
+Commit tracking 118 - শনিবার 11 জুলাই 2026 03:55:29 পূর্বাহ্ণ +06
324
+Commit tracking 119 - শনিবার 11 জুলাই 2026 03:55:29 পূর্বাহ্ণ +06
325
+Commit tracking 120 - শনিবার 11 জুলাই 2026 03:55:29 পূর্বাহ্ণ +06
326
+Commit tracking 121 - শনিবার 11 জুলাই 2026 03:55:29 পূর্বাহ্ণ +06
327
+Commit tracking 122 - শনিবার 11 জুলাই 2026 03:55:30 পূর্বাহ্ণ +06
328
+Commit tracking 123 - শনিবার 11 জুলাই 2026 03:55:30 পূর্বাহ্ণ +06
329
+Commit tracking 124 - শনিবার 11 জুলাই 2026 03:55:30 পূর্বাহ্ণ +06
330
+Commit tracking 125 - শনিবার 11 জুলাই 2026 03:55:30 পূর্বাহ্ণ +06
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+Commit tracking 126 - শনিবার 11 জুলাই 2026 03:55:31 পূর্বাহ্ণ +06
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+Commit tracking 127 - শনিবার 11 জুলাই 2026 03:55:31 পূর্বাহ্ণ +06
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+Commit tracking 128 - শনিবার 11 জুলাই 2026 03:55:31 পূর্বাহ্ণ +06
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+Commit tracking 129 - শনিবার 11 জুলাই 2026 03:55:31 পূর্বাহ্ণ +06
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+Commit tracking 130 - শনিবার 11 জুলাই 2026 03:55:32 পূর্বাহ্ণ +06
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+Commit tracking 131 - শনিবার 11 জুলাই 2026 03:55:32 পূর্বাহ্ণ +06
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+Commit tracking 132 - শনিবার 11 জুলাই 2026 03:55:32 পূর্বাহ্ণ +06
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+Commit tracking 133 - শনিবার 11 জুলাই 2026 03:55:32 পূর্বাহ্ণ +06
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+Commit tracking 134 - শনিবার 11 জুলাই 2026 03:55:32 পূর্বাহ্ণ +06
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+Commit tracking 135 - শনিবার 11 জুলাই 2026 03:55:33 পূর্বাহ্ণ +06
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+Commit tracking 136 - শনিবার 11 জুলাই 2026 03:55:33 পূর্বাহ্ণ +06
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+Commit tracking 137 - শনিবার 11 জুলাই 2026 03:55:33 পূর্বাহ্ণ +06
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+Commit tracking 138 - শনিবার 11 জুলাই 2026 03:55:33 পূর্বাহ্ণ +06
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+Commit tracking 139 - শনিবার 11 জুলাই 2026 03:55:33 পূর্বাহ্ণ +06
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+Commit tracking 140 - শনিবার 11 জুলাই 2026 03:55:33 পূর্বাহ্ণ +06
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+Commit tracking 141 - শনিবার 11 জুলাই 2026 03:55:34 পূর্বাহ্ণ +06
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+Commit tracking 142 - শনিবার 11 জুলাই 2026 03:55:34 পূর্বাহ্ণ +06
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+Commit tracking 143 - শনিবার 11 জুলাই 2026 03:55:34 পূর্বাহ্ণ +06
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+Commit tracking 144 - শনিবার 11 জুলাই 2026 03:55:34 পূর্বাহ্ণ +06
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+Commit tracking 145 - শনিবার 11 জুলাই 2026 03:55:34 পূর্বাহ্ণ +06
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+Commit tracking 146 - শনিবার 11 জুলাই 2026 03:55:34 পূর্বাহ্ণ +06
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+Commit tracking 147 - শনিবার 11 জুলাই 2026 03:55:35 পূর্বাহ্ণ +06
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+Commit tracking 148 - শনিবার 11 জুলাই 2026 03:55:35 পূর্বাহ্ণ +06
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+Commit tracking 149 - শনিবার 11 জুলাই 2026 03:55:35 পূর্বাহ্ণ +06
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+Commit tracking 150 - শনিবার 11 জুলাই 2026 03:55:35 পূর্বাহ্ণ +06
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+Commit tracking 151 - শনিবার 11 জুলাই 2026 03:55:35 পূর্বাহ্ণ +06
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+Commit tracking 152 - শনিবার 11 জুলাই 2026 03:55:36 পূর্বাহ্ণ +06
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+Commit tracking 153 - শনিবার 11 জুলাই 2026 03:55:36 পূর্বাহ্ণ +06
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+Commit tracking 154 - শনিবার 11 জুলাই 2026 03:55:36 পূর্বাহ্ণ +06
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+Commit tracking 155 - শনিবার 11 জুলাই 2026 03:55:36 পূর্বাহ্ণ +06
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+Commit tracking 156 - শনিবার 11 জুলাই 2026 03:55:36 পূর্বাহ্ণ +06
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+Commit tracking 157 - শনিবার 11 জুলাই 2026 03:55:37 পূর্বাহ্ণ +06
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+Commit tracking 158 - শনিবার 11 জুলাই 2026 03:55:37 পূর্বাহ্ণ +06
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+Commit tracking 159 - শনিবার 11 জুলাই 2026 03:55:37 পূর্বাহ্ণ +06
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+Commit tracking 160 - শনিবার 11 জুলাই 2026 03:55:37 পূর্বাহ্ণ +06
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+Commit tracking 161 - শনিবার 11 জুলাই 2026 03:55:37 পূর্বাহ্ণ +06
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+Commit tracking 162 - শনিবার 11 জুলাই 2026 03:55:38 পূর্বাহ্ণ +06
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+Commit tracking 163 - শনিবার 11 জুলাই 2026 03:55:38 পূর্বাহ্ণ +06
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+Commit tracking 164 - শনিবার 11 জুলাই 2026 03:55:38 পূর্বাহ্ণ +06
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+Commit tracking 165 - শনিবার 11 জুলাই 2026 03:55:38 পূর্বাহ্ণ +06
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+Commit tracking 166 - শনিবার 11 জুলাই 2026 03:55:39 পূর্বাহ্ণ +06
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+Commit tracking 167 - শনিবার 11 জুলাই 2026 03:55:39 পূর্বাহ্ণ +06
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+Commit tracking 168 - শনিবার 11 জুলাই 2026 03:55:39 পূর্বাহ্ণ +06
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+Commit tracking 169 - শনিবার 11 জুলাই 2026 03:55:39 পূর্বাহ্ণ +06
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+Commit tracking 170 - শনিবার 11 জুলাই 2026 03:55:40 পূর্বাহ্ণ +06
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+Commit tracking 171 - শনিবার 11 জুলাই 2026 03:55:40 পূর্বাহ্ণ +06
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+Commit tracking 172 - শনিবার 11 জুলাই 2026 03:55:40 পূর্বাহ্ণ +06
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+Commit tracking 173 - শনিবার 11 জুলাই 2026 03:55:40 পূর্বাহ্ণ +06
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+Commit tracking 174 - শনিবার 11 জুলাই 2026 03:55:41 পূর্বাহ্ণ +06
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+Commit tracking 175 - শনিবার 11 জুলাই 2026 03:55:41 পূর্বাহ্ণ +06
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+Commit tracking 176 - শনিবার 11 জুলাই 2026 03:55:41 পূর্বাহ্ণ +06
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+Commit tracking 177 - শনিবার 11 জুলাই 2026 03:55:42 পূর্বাহ্ণ +06
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+Commit tracking 178 - শনিবার 11 জুলাই 2026 03:55:42 পূর্বাহ্ণ +06
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+Commit tracking 179 - শনিবার 11 জুলাই 2026 03:55:42 পূর্বাহ্ণ +06
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+Commit tracking 180 - শনিবার 11 জুলাই 2026 03:55:42 পূর্বাহ্ণ +06
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+Commit tracking 181 - শনিবার 11 জুলাই 2026 03:55:42 পূর্বাহ্ণ +06
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+Commit tracking 182 - শনিবার 11 জুলাই 2026 03:55:43 পূর্বাহ্ণ +06
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+Commit tracking 183 - শনিবার 11 জুলাই 2026 03:55:43 পূর্বাহ্ণ +06
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+Commit tracking 184 - শনিবার 11 জুলাই 2026 03:55:43 পূর্বাহ্ণ +06
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+Commit tracking 185 - শনিবার 11 জুলাই 2026 03:55:43 পূর্বাহ্ণ +06
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+Commit tracking 186 - শনিবার 11 জুলাই 2026 03:55:44 পূর্বাহ্ণ +06
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+Commit tracking 187 - শনিবার 11 জুলাই 2026 03:55:44 পূর্বাহ্ণ +06
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+Commit tracking 188 - শনিবার 11 জুলাই 2026 03:55:44 পূর্বাহ্ণ +06
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+Commit tracking 189 - শনিবার 11 জুলাই 2026 03:55:44 পূর্বাহ্ণ +06
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+Commit tracking 190 - শনিবার 11 জুলাই 2026 03:55:45 পূর্বাহ্ণ +06
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+Commit tracking 191 - শনিবার 11 জুলাই 2026 03:55:45 পূর্বাহ্ণ +06
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+Commit tracking 192 - শনিবার 11 জুলাই 2026 03:55:45 পূর্বাহ্ণ +06
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+Commit tracking 193 - শনিবার 11 জুলাই 2026 03:55:46 পূর্বাহ্ণ +06
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+Commit tracking 194 - শনিবার 11 জুলাই 2026 03:55:46 পূর্বাহ্ণ +06
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+Commit tracking 195 - শনিবার 11 জুলাই 2026 03:55:46 পূর্বাহ্ণ +06
401
+Commit tracking 196 - শনিবার 11 জুলাই 2026 03:55:46 পূর্বাহ্ণ +06
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+Commit tracking 197 - শনিবার 11 জুলাই 2026 03:55:47 পূর্বাহ্ণ +06
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+Commit tracking 198 - শনিবার 11 জুলাই 2026 03:55:47 পূর্বাহ্ণ +06
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+Commit tracking 199 - শনিবার 11 জুলাই 2026 03:55:47 পূর্বাহ্ণ +06
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+Commit tracking 200 - শনিবার 11 জুলাই 2026 03:55:47 পূর্বাহ্ণ +06
406
+Commit tracking 201 - শনিবার 11 জুলাই 2026 03:55:47 পূর্বাহ্ণ +06
407
+Commit tracking 202 - শনিবার 11 জুলাই 2026 03:55:48 পূর্বাহ্ণ +06
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+Commit tracking 203 - শনিবার 11 জুলাই 2026 03:55:48 পূর্বাহ্ণ +06
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+Commit tracking 204 - শনিবার 11 জুলাই 2026 03:55:48 পূর্বাহ্ণ +06
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+Commit tracking 205 - শনিবার 11 জুলাই 2026 03:55:48 পূর্বাহ্ণ +06
0
411
▼SECURITY.md
+7-0
@@ -0,0 +1,7 @@
1
+See `.well-known/security.txt` and `docs/security/policy.md` for the
2
+full security policy and responsible disclosure process.
3
+
4
+- [Security policy](docs/security/policy.md)
5
+- [OWASP compliance checklist](docs/security/owasp-checklist.md)
6
+- [Penetration test guidelines](docs/security/pentest-guide.md)
7
+- [Security.txt](.well-known/security.txt)
0
8