fix(rees): run REES coverage's test child from review-enrichment/

[JSONbored]

Summary

• scripts/rees-coverage.ts spawned c8 and the node:test child it wraps with the same cwd (the monorepo root) — needed so c8's lcov SF: paths remap to review-enrichment/src/** for Codecov — but this left the actual test process running from the wrong directory, so tests reading fixtures via bare relative paths (e.g. analyzer-metadata.test.ts reading "analyzer-metadata.json") failed with ENOENT even though the fixture exists at review-enrichment/analyzer-metadata.json.
• Adds scripts/rees-coverage-chdir.cjs, preloaded via --require into only the spawned test child, chdir'ing it into review-enrichment/ before node:test loads any files. c8's own process cwd (and its SF: path remapping) is untouched.
• Test file arguments switch from root-relative to absolute paths since they're now resolved against a different cwd than before.
• This script is a diagnostic/Codecov-harvesting step (npm run rees:coverage, uploaded with || true in CI since c8 instrumentation is known to blow timing-sensitive budgets) — it is not the actual REES gate (npm --prefix review-enrichment test, unaffected by this bug and already passing).

Test plan

• node --experimental-strip-types scripts/rees-coverage.ts — 1376/1376 pass, 0 failures (previously 1 ENOENT failure)
• npm run test:node --prefix review-enrichment — same test count, clean pass, confirms parity
• lcov.info's SF: lines all remain review-enrichment/src/** (unchanged from pre-fix behavior)
• npx tsc --noEmit clean

[superagent-security]

Superagent didn't find any vulnerabilities or security issues in this PR.

[loopover-orb]

Warning

⏸️ LoopOver review result - manual review recommended

_{Review updated: 2026-07-25 09:49:30 UTC}

2 files · 1 AI reviewer · 2 blockers · CI green · clean

⏸️ Suggested Action - Manual Review

Review summary
This is a narrow, well-traced fix for a real cwd bug in the diagnostic REES coverage harvester: c8 needs to run from the monorepo root for lcov SF: path remapping, but that same cwd broke tests that read fixtures via bare relative paths. The fix isolates the chdir to only the spawned node:test child via a --require preload (rees-coverage-chdir.cjs), leaving c8's own process cwd untouched, and correctly switches the test path list from root-relative to absolute since the child's cwd changed. The change is internally consistent — normalizeLcovSfPaths still operates on the c8 process's lcov output at the root cwd, unaffected by the child's chdir — and the PR's own test plan (1376/1376 passing, unchanged lcov SF: paths, clean tsc) supports the claimed fix.

Nits — 6 non-blocking

• The PR doesn't cite an issue number for this specific bug (the fix(ci): review-enrichment's real node:test coverage is invisible to Codecov (83 of 83 files effectively unmeasured) #6250 reference in comments is for the original coverage-harvesting feature, not this ENOENT fix) — worth confirming there's a linked issue per repo convention.
• rees-coverage-chdir.cjs and rees-coverage.ts duplicate the same lcov-remap-and-cwd-juggling pattern already present in scripts/control-plane-coverage.mjs; consider extracting a shared coverage-harness helper to avoid drift between the two scripts (nit, not blocking given they're independent per-package scripts today).
• No test coverage exists for rees-coverage.ts/rees-coverage-chdir.cjs themselves, though this is consistent with control-plane-coverage.mjs also being untested tooling outside src/**.
• Consider a small shared module (e.g. scripts/coverage-harness.mjs) exporting collectTests/normalizeLcovSfPaths logic used by both rees-coverage.ts and control-plane-coverage.mjs to reduce duplication.
• Add a one-line comment in rees-coverage.ts near the `--require chdirPreload` invocation cross-referencing rees-coverage-chdir.cjs's own comment, so a future reader sees both halves of the cwd split without opening two files.
• Code changes lack test evidence — Add focused regression tests or explain why existing coverage is sufficient.

Concerns raised — review before merging

• No linked issue detected: No closing reference or linked issue number was found in the PR metadata/body. — If this PR is intended to solve an issue, link it explicitly in the PR body.
• Maintainer requires a linked issue: This repo's maintainer focus manifest requires every PR to reference a tracked issue. — Link the relevant issue (for example Closes #123) before opening the PR.

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Fix the following blocker(s) from this PR review:

1. No linked issue detected: No closing reference or linked issue number was found in the PR metadata/body. — If this PR is intended to solve an issue, link it explicitly in the PR body.

2. Maintainer requires a linked issue: This repo's maintainer focus manifest requires every PR to reference a tracked issue. — Link the relevant issue (for example `Closes #123`) before opening the PR.

Decision drivers

• ❌ Code review — 2 blockers (1 reviewer)
• ❌ Gate result — Blocking (Repo-configured hard blocker found.)

Context & advisory signals — never blocks the verdict

Signal	Result	Evidence
Linked issue	⚠️ Missing	No linked issue or no-issue rationale found.
Related work	✅ No active overlap found	No same-issue or scoped active PR overlap found.
Change scope	✅ 20/20	Low review scope from cached public metadata (no linked issue context).
Validation posture	✅ 25/25	PR body includes validation/test evidence.
Contributor workload	✅ 10/10	Author activity: 13 registered-repo PR(s), 13 merged, 250 issue(s).
Contributor context	✅ Confirmed Gittensor contributor	JSONbored; Gittensor profile; 13 PR(s), 250 issue(s).
Improvement	ℹ️ None detected	risk: low · value: none · LLM: moderate

Review context

• Author: JSONbored
• Role context: owner (maintainer lane)
• Public audience mode: oss maintainer
• Lane context: Repository is configured for direct PR review.
• Public profile languages: Python, TypeScript, Ruby, Go, MDX, Shell, Solidity, JavaScript
• Official Gittensor activity: 13 PR(s), 250 issue(s).
• PR-specific overlap: none found.

Contributor next steps

• Start here: Treat this as maintainer-lane context rather than normal contributor-lane activity.
• Then work through the remaining 2 steps in the Signals table above.

Signal definitions

• Related work = same linked issue, overlapping active PRs, or title/path similarity.
• Change scope = cached public metadata such as size labels, draft state, and review-burden hints.
• Validation posture = whether the PR provides enough public validation/test evidence for maintainer review.
• Contributor workload = public contributor activity and cleanup pressure, not a repo-wide quality failure.
• Contributor context = public GitHub/Gittensor identity context; non-Gittensor status is not a blocker.

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_{🟩 Safe / merged · 🟦 Advisory · 🟨 Held for review · 🟥 Blocked / closed}

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