Fix/wasm parser lifetime

[csm-kb]

Was working with graft on a large codebase (~65k files) to stress-test, noticed some failure doing so -> attempted a fix pass to move it towards functional. Feel free to leave inputs or modify/reject!

I have a subsequent PR that improves the graft build memory tolerance + performance using a streaming worker pool (~2.5x speedup on that codebase) that I can open afterwards.

---

Problem

extractGeneric and parseWasm created a Parser per file and never deleted it or the Tree. Both live in the WASM heap (2 GB cap, no finalizer), so a 65k-file C repo aborted after ~12k files and every subsequent parse failed with Aborted() after a few minutes.

Solution

Reuse one parser per grammar and delete every tree. After a real abort, fail every later parse with one message instead of one per file. parseWasm now returns the tree for the container tier to free, and rethrows instead of caching a symbol-less file as a success.

[trailhq-graft]

🌱 graft blast radius

2 areas changed → 7 areas can be affected. 20 dependent symbols, depth 2.
Tests: 1 area updated its tests.
Tag: @anirudhkumar-nanonets — 7 of 9 areas · @shhdwi — 6 of 9 areas · @Frankie-Xu — Context Building

flowchart TB
  A0(("Graph Workspace Orchestration<br/>7 symbols"))
  A1(("Pull Request Review<br/>6 symbols"))
  A2(("Engine Graph<br/>2 symbols"))
  A3(("Context Building<br/>2 symbols"))
  A4(("Viewer Build Script<br/>1 symbol"))
  AX(("2 smaller areas<br/>2 symbols"))
  classDef reached fill:#D9EDF3,stroke:#3AA7C9,stroke-width:1.5px,color:#0E313C;
  class A0,A1,A2,A3,A4 reached;
  classDef tail fill:#EEF2F3,stroke:#9AA4A9,stroke-width:1px,color:#3A4247;
  class AX tail;

Loading

Can be affected	Symbols	Nearest hop	Reached from
Graph Workspace Orchestration	7	src/graph/check.ts:L58-L164 checkGraph — calls, depth 1	Graph Construction, test/generic-extract.test.ts
Pull Request Review	6	src/app/review-process.ts:L206-L211 settle — calls, depth 1	Graph Construction, test/generic-extract.test.ts
Engine Graph	2	src/engine.ts:L91-L101 graph — calls, depth 1	Graph Construction
Context Building	2	src/context/build.ts:L452-L467 mapWithConcurrency — calls, depth 1	test/generic-extract.test.ts
Viewer Build Script	1	scripts/build-viewer.mjs:L1-L45 build-viewer.mjs — calls, depth 2	Graph Construction
MCP Tools	1	src/mcp/tools.ts:L216-L244 callTool — calls, depth 2	Graph Construction
1 smaller area	1	Claude Sync Execution	see below

Who knows this code — 4 people across 9 areas

Area	Who knows it
Graph Construction · changed	@anirudhkumar-nanonets — 17 commits, last 21d ago · @shhdwi — 11 commits, last 28d ago
CLI · changed	@anirudhkumar-nanonets — 36 commits, last 8d ago · @shhdwi — 23 commits, last 28d ago
Graph Workspace Orchestration · affected	@anirudhkumar-nanonets — 16 commits, last 14d ago · @shhdwi — 8 commits, last 29d ago
Pull Request Review · affected	@anirudhkumar-nanonets — 5 commits, last 9d ago
Engine Graph · affected	@anirudhkumar-nanonets — 16 commits, last 1mo ago
Context Building · affected	@anirudhkumar-nanonets — 4 commits, last 21d ago · @Frankie-Xu — 2 commits, last 10d ago
Viewer Build Script · affected	@shhdwi — 2 commits, last 29d ago
MCP Tools · affected	@shhdwi — 14 commits, last 29d ago · @anirudhkumar-nanonets — 7 commits, last 8d ago
…1 further area

Ownership is git history over each area's own files, weighted towards recent work (120-day half-life). Merge commits and bots are dropped, and you are dropped from your own PR. A name with no @ has no GitHub handle in its commit email — tag them by hand, or add a .mailmap entry. A suggestion from history, not a CODEOWNERS rule.

All 20 dependent symbols, grouped by area

Graph Workspace Orchestration — 7 symbols in 5 files

• src/graph/check.ts:L58-L164 — checkGraph (calls, depth 1)
  90: await warmGenericGrammars(
• src/graph/enrich.ts:L226-L241 — mapWithConcurrency (calls, depth 1)
  229: fn: (item: T, index: number) => Promise<R>,
• src/graph/refresh.ts:L150-L227 — ensureFreshGraph (calls, depth 1)
  216: await buildGraph(dir, { contextDir: opts.contextDir, graphOnly: true, onlyDirs });
• src/graph/enrich.ts:L74-L223 — enrichGraph (calls, depth 2)
  94: const was = prior.get(node.id);
• src/graph/refresh.ts:L235-L261 — ensureFreshChildren (calls, depth 2)
• src/graph/workspace-cli.ts:L49-L70 — buildChild (calls, depth 2)
• src/graph/workspace.ts:L630-L655 — federateCheck (calls, depth 2)

Pull Request Review — 6 symbols in 4 files

• src/app/review-process.ts:L206-L211 — settle (calls, depth 1)
  206: const settle = (fn: () => void): void => {
• src/app/review.ts:L45-L99 — reviewPullRequest (calls, depth 1)
  55: await buildGraph(checkout.dir);
• src/app/review-process.ts:L179-L183 — childReviewer (references, depth 2)
• src/app/review-process.ts:L185-L265 — runInChild (calls, depth 2)
  206: const settle = (fn: () => void): void => {
• src/app/review-worker.ts:L67-L87 — run (calls, depth 2)
• src/app/server.ts:L31-L37 — AppSeams (references, depth 2)

Engine Graph — 2 symbols in 1 file

• src/engine.ts:L91-L101 — graph (calls, depth 1)
  91: graph(dir: string, opts: GraphRunOptions = {}): Promise<GraphBuildResult> {
• src/engine.ts:L82-L84 — checkGraph (calls, depth 2)

Context Building — 2 symbols in 1 file

• src/context/build.ts:L452-L467 — mapWithConcurrency (calls, depth 1)
  455: fn: (item: T, index: number) => Promise<R>,
• src/context/build.ts:L146-L374 — buildContext (calls, depth 2)
  258: else delete cache.synth[key];

Viewer Build Script — 1 symbol in 1 file

• scripts/build-viewer.mjs:L1-L45 — build-viewer.mjs (calls, depth 2)
  3: * assets). Runs as part of `npm run build`; the bundle ships in the package

MCP Tools — 1 symbol in 1 file

• src/mcp/tools.ts:L216-L244 — callTool (calls, depth 2)

Claude Sync Execution — 1 symbol in 1 file

• src/claude/sync-run.ts:L19-L33 — runSync (calls, depth 2)

Test signal per changed area — 1 ✓ · 1 –

Reached = a node under a test path has a resolved edge into the changed symbol. It undercounts anything called indirectly — through a CLI, a spawned process or a dynamic import — so read a low ratio as “look here”, never as a coverage gate.

• ✓ Graph Construction — 9 of 12 reached · 2 test files changed here: test/container-extract.test.ts, test/generic-extract.test.ts
  • not reached: notePoison, poisonedError, mkDef
• – CLI — no function, method or class changed here

35 test suites also reference this code

47 symbols, kept out of the diagram and the table so they cannot crowd out the areas a reviewer has to look at.

• test/ask-index.test.ts
• test/ask.test.ts
• test/claude-hooks.test.ts
• test/context-only-dir.test.ts
• test/context.test.ts
• test/covers.test.ts
• test/generic-node24-probe.ts
• test/graph-go.test.ts
• test/graph-incremental.test.ts
• test/graph-invariants.test.ts
• test/graph-java.test.ts
• test/graph-languages.test.ts
• test/graph-php.test.ts
• test/graph-posix-paths.test.ts
• test/graph-python.test.ts
• test/graph-r-classes.test.ts
• test/graph-r-phase3.test.ts
• test/graph-r-phase4.test.ts
• test/graph-r-phase5.test.ts
• test/graph-r.test.ts
• …15 more

⚠️ 1 changed file not in the graph (CHANGELOG.md) — no parser claims the extension, or the index predates the file.

_{graft blast · origin/main...HEAD · depth 2 · 7 changed files}

Open the interactive graph → — click an area to see its dependent symbols at file:line.