Phase 0 of the Rust extraction-kernel migration (docs/design/
rust-kernel-migration-plan.md, now checked in with §3a recording the
shipped state):
- codegraph-kernel/ napi-rs crate: extractFile(path, content, language)
→ five flat buffers (meta/nodes/edges/refs/arena), one JS boundary
crossing per file. Node ids computed Rust-side, byte-identical to
generateNodeId (pinned by test vector). Reserved per-node metrics slot
for the Arc 3.2 code-metrics work.
- Generic .scm-driven emitter (@def.<kind>/@name/@ref.<kind> captures,
byte-range scope stack → ::-joined qualified names, contains edges,
refs attributed to the innermost enclosing symbol). Seed TS/JS queries
are smoke-level; R2 replaces them with the full port.
- Routing seam in extractFromSource with per-file wasm fallback.
DEFAULT_ROUTED is empty — no behavior change until a language passes
its equivalence gate (R3). Dev opt-in: CODEGRAPH_KERNEL_LANGS. Kill
switch: CODEGRAPH_KERNEL=0. Loader verifies ABI + kind tables before
routing; EDGE_KINDS became a runtime array because kind order is now
wire contract.
- Grammar-source parity: vendored TS/TSX/JS wasm grammars built from the
exact crate revisions (tree-sitter-typescript v0.23.2,
tree-sitter-javascript v0.25.0, checked-in parser.c, ts-cli 0.25.10) —
the tree-sitter-wasms builds were 2023-era, which the new
kernel-grammar-parity test caught on day one. Production TS/JS parsing
gets 2.5 years of grammar fixes; full suite green (2456 tests).
- Build/release wiring: scripts/build-kernel.sh + npm run build:kernel;
release.yml kernel prebuild matrix (continue-on-error — the kernel is
optional everywhere, bundles fall back to the wasm path); bundles stage
lib/kernel/codegraph-kernel.node; release job runs the kernel suites
with CODEGRAPH_KERNEL_EXPECT=1.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Colby McHenry