fix(core): prune dependency trees during startup scans - #1184
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`Glob.Options` lost its `ignore` field in the v1.17.9 bridge, so `Glob.scan`
could no longer prune anything. The two `**/mcp.json` call sites compensated by
filtering the *results* — which does not help, because every directory has
already been opened and read by then. On a repo with `node_modules` installed,
the two scans that run on startup cost `12.93` CPU-seconds, nearly all of it
kernel time fanned out across the runtime I/O thread pool (one thread per core).
- restore `ignore` on `Glob.Options` and pass it to `glob`. A pattern ending in
`/**` makes `glob` prune the subtree rather than walk and discard it.
- add `Glob.DEFAULT_IGNORE`, the shared package-manager / VCS / build-output
exclusion set, every entry shaped to prune.
- use it in `datamate-transport` (`serve` startup), `mcp/discover` (every config
load), `Project.discover` (`**/favicon.*` over the worktree) and
`cli/cmd/check` (`**/*.{sql,ddl}` over the cwd). The existing result filters
stay as defence in depth.
Measured on this monorepo, 16-core M4:
startup scans 12.93 -> 0.14 CPU-s (92x)
`serve` startup 21.3 -> 4.1 CPU-s (5.2x, whole process, dev entrypoint)
`**/mcp.json` glob 6.24 -> 0.06 CPU-s, 535ms -> 16ms wall
Behaviour change: a `favicon.*` inside `node_modules`/`dist` is no longer
eligible as the project icon, and `altimate-code check` with no file arguments
no longer picks up vendored SQL. Both are intended.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VqnuBDGkh1ZT65Ti7e6DHZ
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No actionable comments were generated in the recent review. 🎉 ℹ️ Recent review info⚙️ Run configurationConfiguration used: Repository UI Review profile: CHILL Plan: Pro Plus Run ID: 📒 Files selected for processing (4)
Included review availability: Your plan provides up to 4 included reviews per hour; 0 remain after this review. 📝 WalkthroughWalkthroughThe glob utility now supports traversal-time ignore patterns and shared dependency and default ignore sets. MCP, SQL/DDL, and favicon discovery scans use these sets. Tests verify subtree pruning and retention of authored files in output-named directories. ChangesGlob pruning and scan adoption
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: ⚪ Minimal · up to The change prunes excluded filesystem subtrees while preserving MCP filtering and authored content discovery; no actionable merge-blocking risk remains after normal checks and review. Sequence Diagram(s)sequenceDiagram
participant Discovery
participant GlobScan
participant ProjectTree
Discovery->>GlobScan: scan with ignore patterns
GlobScan->>ProjectTree: traverse matching paths
ProjectTree-->>GlobScan: return non-pruned matches
GlobScan-->>Discovery: return discovered files
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All reported issues were addressed across 7 files
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In `@packages/opencode/test/cli/check-e2e.test.ts`:
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…ch" (#1213) * fix(skills): stop walking the whole tree to answer "does any file match" `applyPaths` auto-load asks one question per skill — does at least one file in the worktree match this glob — and answered it with `Glob.scan(...).length > 0`. `scan` resolves only once the entire walk has finished, so every skill paid for the full tree even when the first directory already answered. Two builtin skills ship with `applyPaths` (`dbt-develop`, `dbt-schema-verify`), so every session pays this twice, before the first token, with no configuration and no workspace involved. The cost depends entirely on what the worktree resolves to. Inside a git repo it is the repo root and the scans take ~10ms. Outside one, `Project.fromDirectory` returns the global project whose worktree is `/`, and the two scans walk the entire filesystem. Measured from a directory outside a git repo, same binary, same prompt: scan(...).length > 0 48.4 52.9 51.6 s Glob.exists (this change) 9.1 6.8 6.4 s scan removed entirely 7.1 6.8 6.7 s (floor) Inside a repo: 7.5 / 7.3s, unchanged. `Glob.exists` uses `globIterate`, which yields lazily, so the walk is abandoned at the first match. It takes the same options as `scan` — the tests pin `include`, `ignore` and the missing-directory case, and fail if the options stop being forwarded. Also tried and rejected: passing `ignore: Glob.DEFAULT_IGNORE` here, the way #1184 did for the MCP scans. It made this *slower* — 61-82s against a ~51s baseline — because outside a repo the tree is not dependency-heavy, so every candidate path pays 12 minimatch tests and almost nothing gets pruned. Early exit is the right lever for an existence check. Not addressed here: the worktree being `/` outside a git repo. That makes skills auto-load off unrelated files elsewhere on the machine, which is a correctness question for whoever owns project identity. core suite: 1072 pass, 26 fail — the same 26 fail on unmodified main. session/skill suites: 1516 pass, 0 fail. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018fJ3X7pcGT4R9yzjsJnqsV * fix(skills): do not match applyPaths against the whole filesystem `Project.fromDirectory` reports `/` as the worktree for a directory that belongs to no git project. That is a sentinel meaning "no project", and upstream only ever compares or displays it — `anyMatchInWorktree` is the one place either codebase treats it as a directory to search. So outside a git repo the globs matched against `/`, and a skill loaded because an unrelated file existed somewhere else on the machine. An empty scratch directory auto-loaded both dbt skills, because some `dbt_project.yml` exists elsewhere under $HOME: $ cd "$(mktemp -d)" && altimate run "..." skill auto-loaded by applyPaths skill=dbt-develop globs=["dbt_project.yml","**/dbt_project.yml"] skill auto-loaded by applyPaths skill=dbt-schema-verify globs=["dbt_project.yml","**/dbt_project.yml"] Their bodies then go into the system prompt, so the model is told to follow dbt conventions in a directory that has nothing to do with dbt. `autoLoadScanRoot` falls back to the session's own directory when the worktree is that sentinel. Verified in both directions on a built binary: an empty non-git directory now auto-loads 0 skills, and one containing a real `dbt_project.yml` still auto-loads 2. The root choice is extracted so it can be tested without an instance context; the test fails if the guard is removed, and covers equality rather than prefix matching, since every absolute path starts with "/". session + skill suites: 1519 pass, 0 fail. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018fJ3X7pcGT4R9yzjsJnqsV * fix(skills): distinguish the no-project sentinel by VCS, not by path Review follow-ups on the `/` guard. `Project.fromDirectory` returns `/` in two different situations: a directory belonging to no git project (`vcs` undefined), and a git repository genuinely rooted at `/` (`vcs: "git"`). The guard tested the path alone, so it also narrowed the scan for a real root-rooted repo — a marker at `/` stopped matching a session started in `/workspace/sub`. `autoLoadScanRoot` now takes the vcs and only treats `/` as the sentinel when there is none, which is the same distinction `fromDirectory` draws when it picks the value. The comment above `anyMatchInWorktree` still claimed the root is chosen so a pattern "catches the file no matter how deep the user's cwd is". That stopped being true outside a project in the previous commit, and it was the first thing a reader hit. It now says what the code does and points at the docstring for why. The narrowing itself is deliberate and now stated where it belongs: outside a project there is no boundary to walk up to, so any wider root is a guess about which of the machine's files belong to this session — the guess the previous behaviour made, and got wrong. A marker above the cwd no longer auto-loads its skill in that case, which is the trade against loading skills from unrelated directories. Tests cover the root-rooted repo case; removing the vcs condition fails it. Verified end to end on a built binary: empty non-git directory 0 skills, non-git directory containing `dbt_project.yml` 2, inside a repo 2. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018fJ3X7pcGT4R9yzjsJnqsV --------- Co-authored-by: Claude Opus 5 <noreply@anthropic.com>
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Issue for this PR
Closes #1183
Type of change
What does this PR do?
Recursive startup scans were walking the whole project tree—including
node_modules,.git, and generated output—and only filtering matching files afterward. On a dependency-installed monorepo, the two startup MCP scans alone consumed about 12.93 CPU-seconds per launch.The root cause was that
Glob.Optionsdeclared noignorefield and the wrapper did not pass one toglob. This PR restores that contract so callers can prune subtrees during traversal.The final design uses two policies:
Glob.DEPENDENCY_IGNORE: dependency, vendored, VCS, virtual-environment, and tool-cache trees. Content discovery uses this so authored SQL, DDL, and favicons under directories namedbuild,dist,out, ortargetremain visible.Glob.DEFAULT_IGNORE: the dependency set plus generated/output directories. MCP discovery uses this stricter policy because discovered configuration can select local commands or remote endpoints.Applied at four scan sites:
altimate-code checkSQL/DDL discoveryBoth MCP consumers retain a defence-in-depth result filter. Datamate now derives that filter from the shared policy and normalizes relative paths to forward slashes before matching, removing its duplicated POSIX-only directory list.
Review fixes included
This revision addresses every validated review comment, including the late vendor-policy warning:
vendor/**is now part of the narrow dependency policy and remains inherited by the broad policy; shared glob, default SQL/DDL, and favicon regressions cover it.A direct Datamate regression makes malicious
node_modules,build, anddistconfigs lexically earlier than a safe authored config and proves that only the authored transport wins.Performance evidence
Measured on a 16-core M4 with this repository and dependencies installed:
syncDatamateUrlFromVscodeMcpdiscoverExternalMcp**/mcp.jsonglobWhole-process development
servestartup dropped from 21.3 CPU-s to 4.1 CPU-s before idle.Verification on final head
Final head:
22b3fdacadfb2b2b1237dc245b550bf5948f8befbun test test/utilinpackages/core: 35 passed, 0 failed.bun run typecheck: 13/13 tasks passed, including the push hook.7fb0f303-9139-4dff-88fb-bc42e00ea9d5: complete coverage througha3d21a957c, 0 findings. Supplemental final-head scan3cb61974-5908-4d90-962f-0a52478bc944coversa3d21a957c..22b3fdacad, complete coverage, 0 findings. Marker Guard, require-markers, and typecheck pass on final head.Known baseline limitations
Screenshots / recordings
Not a UI change.
Checklist
Summary by CodeRabbit
New Features
Improvements
Tests
Note
Medium Risk
MCP and Datamate discovery still gate which local commands run; behavior is tightened with shared ignore policies and retained post-filters, but any glob policy mistake could miss or expose configs.
Overview
Restores
ignoreonGlob.Optionsand forwards it toglob, so recursive**/…scans prunenode_modules,.git, and build trees during traversal instead of walking the full tree and filtering matches afterward. That behavior had been dropped from the wrapper, which made startup MCP scans very expensive on dependency-installed monorepos.Introduces shared
Glob.DEPENDENCY_IGNORE(deps/VCS/tool caches only) andGlob.DEFAULT_IGNORE(deps plusdist,build,target, etc.), with patterns shaped as/**/dir/**so subtrees are pruned, not post-filtered.MCP discovery (Datamate transport + external
discoverExternalMcp) now passesDEFAULT_IGNOREinto the scan and keeps aGlob.matchpost-filter so symlink edge cases still cannot surface vendored commands. Datamate drops its duplicated POSIX path-segment filter in favor of the shared policy.Content discovery uses the narrower set: default
checkSQL/DDL globbing and project favicon scans skip dependency/vendor trees but still see files under output-style directory names (build/,out/, …).Adds core glob regression tests plus consumer tests for check discovery, MCP exclusion, favicon selection, and Datamate transport when malicious configs appear earlier in sort order.
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