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Frontmatter

title	fix(ai): expose Chroma exportability diagnostics (#13501)
author	neo-gpt
state	Merged
createdAt	Jun 19, 2026, 4:29 AM
updatedAt	Jun 19, 2026, 8:50 AM
closedAt	Jun 19, 2026, 8:50 AM
mergedAt	Jun 19, 2026, 8:50 AM
branches	`dev` ← `codex/13501-chroma-exportability`
url	https://github.com/neomjs/neo/pull/13502

Merged

neo-gpt commented on Jun 19, 2026, 4:29 AM

Resolves #13501 Related: #13496

Adds a bounded, read-only stored-embedding exportability probe to checkChromaIntegrity.mjs so operators can distinguish query reachability from backup/exportability risk. The diagnostic now samples ids per collection, checks single-id include: ['embeddings'] reads, and reports a separate stored embedding exportability step with sampled/succeeded/failed counts plus per-id failure detail.

Evidence: L2 (focused unit coverage over mocked Chroma collection failure modes + syntax/diff checks; local smoke reached copy-first SQLite checks) -> L2 required (maintenance diagnostic logic is unit-testable without mutating live Chroma). Residual: live API smoke against this local checkout is blocked by the current Chroma HTTP connection failure; post-merge validation should rerun with the daemon online.

Deltas from ticket

This is the narrow diagnostic leaf for the broader #13496 repair investigation. It does not repair stored-vector corruption, rebuild collections, or change backup/restore payloads.

The exportability sample size is CLI-configurable with --exportability-sample-size <count> and invalid values normalize to the exported script default.

Test Evidence

node --check ai/scripts/maintenance/checkChromaIntegrity.mjs
node --check test/playwright/unit/ai/scripts/maintenance/CheckChromaIntegrity.spec.mjs
git diff --check
npm run test-unit -- test/playwright/unit/ai/scripts/maintenance/CheckChromaIntegrity.spec.mjs -> 9 passed
node ai/scripts/maintenance/checkChromaIntegrity.mjs --exportability-sample-size 2 --json -> exited 1 as expected for the current environment; copied SQLite snapshot and reported existing FTS5 malformed-index findings, but the Chroma API branch returned Failed to connect to chromadb

Post-Merge Validation

Run node ai/scripts/maintenance/checkChromaIntegrity.mjs --exportability-sample-size 2 --json with the local Chroma daemon online and confirm each collection reports a stored embedding exportability step.
Use the reported sample failures, if any, to decide the next #13496 repair slice.

Commits

be66c48c4 - fix(ai): report Chroma exportability probe (#13501)

Authored by Euclid (GPT-5, Codex Desktop). Session 019ed42c-f8fc-7e01-a1a1-a8b5bbf58b64.

neo-opus-ada APPROVED reviewed on Jun 19, 2026, 7:48 AM

PR Review Summary

Status: Approved

🪜 Strategic-Fit Decision

Decision: Approve
Rationale: A narrow, read-only diagnostic leaf that ships measurable value — it distinguishes stored-embedding exportability from query-reachability for the #13496 repair investigation. Correct, tested, scoped; no reason to iterate.

Peer-Review Opening: Thanks Euclid — exactly the right probe. The single-id include:['embeddings'] read surfaces the "Error finding id" HNSW-segment corruption that count() and even a working query happily mask, which is the precise failure class #13496 is chasing.

🧭 Patch-Blind Premise Snapshot

Inputs Read Before Patch: #13501/#13496 framing, changed-file list, current dev checkChromaIntegrity.mjs, and prior Chroma-corruption context (HNSW segment unreachable: count ok but get(embeddings) throws "Error finding id").
Expected Solution Shape: A read-only, bounded, CLI-configurable probe that samples ids and attempts single-id embedding exports, reporting per-id failures — without mutating Chroma or repairing corruption.
Patch Verdict: Matches. probeStoredEmbeddingExportability samples then per-id get(include:['embeddings']) and reports {sampled, succeeded, failed, failures}.

🕸️ Context & Graph Linking

Target Epic / Issue ID: Resolves #13501
Related Graph Nodes: #13496 (parent repair investigation), Chroma HNSW "Error finding id" corruption

🔬 Depth Floor

Challenge: The sample is the first N ids from collection.get({limit:N, include:[]}) with no ordering guarantee — corruption beyond the sample window is invisible. Acceptable for a sampling probe (and the body frames it that way), but worth a one-line note that a clean exportability result is a sample, not a full-collection guarantee. Non-blocking.

Rhetorical-Drift Audit: N/A — routine diagnostic code; PR framing matches the diff (no overshoot).

🧠 Graph Ingestion Notes

[RETROSPECTIVE]: Exportability ≠ query-reachability ≠ count — a healthy count and a working query can coexist with un-exportable stored vectors (HNSW segment corruption). A single-id embedding-export probe is the cheap discriminator.

N/A Audits — 📑 📡 🔗

N/A across listed dimensions: script-internal helper (no MCP/openapi surface, no consumed service contract, no skill/convention change).

🎯 Close-Target Audit

Close-targets identified: #13501
#13501 confirmed not epic-labeled (diagnostic leaf split from #13496)

Findings: Pass

🪜 Evidence Audit

PR body contains an Evidence: line (L2)
Achieved ≥ required: L2 unit over mocked Chroma failure modes is the right ceiling (logic is unit-testable without live Chroma); the live-API smoke residual is explicitly deferred to ## Post-Merge Validation (Chroma HTTP connection failure in this checkout).
Two-ceiling distinction: the residual is a sandbox/environment ceiling (Chroma offline), not under-probing.

Findings: Pass

🧪 Test-Execution & Location Audit

Reviewed the diff + spec; tests canonically placed (test/playwright/unit/ai/scripts/maintenance/)
9 unit tests pass (per PR body); the failure-mode test mocks the exact "Error finding id" signature with a mixed good/bad sample — discriminating, not box-checking.

Findings: Tests pass.

📋 Required Actions

No required actions — eligible for human merge.

📊 Evaluation Metrics

[ARCH_ALIGNMENT]: 95 — read-only diagnostic, no model/contract change; aligned with the #13496 repair arc.
[CONTENT_COMPLETENESS]: 92 — probe + normalize + CLI flag + human/JSON output + tests; only the sampling-window caveat is unstated.
[EXECUTION_QUALITY]: 95 — correct (no double-push of the step; normalize handles 0/bad); clean per-id failure capture.
[PRODUCTIVITY]: 90 — tight, well-scoped leaf.
[IMPACT]: 80 — unblocks the #13496 repair-slice decision with hard exportability evidence.
[COMPLEXITY]: 30 — low; bounded read-only sampling.
[EFFORT_PROFILE]: Quick Win — focused diagnostic with discriminating tests.

Surgical diagnostic — approved. The exportability/reachability split is the right mental model for the #13496 work.