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dffb607ef7 |
v0.30.1 feat: operational hardening — make upgrades just work on Supabase (#750)
* v0.30.1 Lane A: connection-manager foundation + X1 initSchema routing Routes Postgres queries by query type: - read() goes to the Supabase pooler (port 6543, fast) - ddl() and bulk() go to direct (port 5432, 30min stmt timeout, mwm 256MB) Auto-detects Supabase via hostname pooler.supabase.com or port 6543. Override with GBRAIN_DIRECT_DATABASE_URL. Kill-switch via GBRAIN_DISABLE_DIRECT_POOL=1 falls back to single-pool legacy path. Foundation modules (Lane A scope): - src/core/connection-manager.ts: read/ddl/bulk/healthCheck, parent-CM inheritance (T5/X1), cached Promise<Sql> lazy init (A1), kill-switch inheritance (A2), Supabase URL auto-derivation - src/core/url-redact.ts: redactPgUrl + redactDeep (F3) - src/core/retry-matcher.ts: typed predicates for stmt-timeout / lock / conn errors (C4) - src/core/connection-audit.ts: ~/.gbrain/audit/connection-events JSONL with ISO-week rotation; doctor tail-reads last 5 errors (F8) - scripts/check-pg-url-redaction.sh: CI grep guard against unredacted postgresql:// URL leaks (F3) Engine integration: - PostgresEngine.connect: instantiates instance-owned ConnectionManager, inherits from parentConnectionManager when set (worker engines, sync, cycle), shares pool with module-singleton path - PostgresEngine.disconnect: tears down direct pool first - PostgresEngine.initSchema: routes DDL through connectionManager.ddl() when dual-pool active (X1 part 1; lock semantics replacement is Lane B) - cli.ts:connectEngine(opts): probeOnly skips initSchema entirely (X1 part 2 — get_health, upgrade --status will use this) Tests added (51 new cases): - test/url-redact.test.ts: 11 cases - test/retry-matcher.test.ts: 13 cases - test/connection-manager.test.ts: 27 cases (URL detection, derive, kill-switch, parent inheritance, dual-pool routing modes) Foundation for Lanes B-E. Sequential lane work continues. Plan: ~/.claude/plans/system-instruction-you-are-working-stateless-wadler.md Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> * v0.30.1 Lane B: migration runner retry + verify hooks + namespaced --force flags Adds Migration interface fields: - idempotent: boolean (default true; explicit false blocks verify-hook re-runs on destructive migrations) - verify: optional post-condition probe; runs after migration claims success Migration retry wrapper (Cherry D3 / Finding F2): - 3 attempts with 5s/15s/45s backoff (env GBRAIN_MIGRATE_BACKOFF_MS=0 for tests) - Retries only on statement_timeout (57014) or connection-reset patterns - Pre-attempt: logs idle-in-transaction blockers via getIdleBlockers - On exhaustion: throws MigrationRetryExhausted with named PID + suggested pg_terminate_backend() recovery command Verify-hook self-healing (Cherry D6 / Codex X3): - On verify=false + idempotent=true → re-runs migration once silently - On verify=false + idempotent=false → throws MigrationDriftError - --skip-verify CLI flag bypasses for operator override withRefreshingLock helper (Cherry T4 / Codex A4 / X1 part 3): - setInterval refresh every TTL/6 ms during long-running work - SELECT 1 backend-alive heartbeat per refresh tick - Heartbeat hang past 30s → log + clear interval; lock TTL auto-expires - LockUnavailableError when acquire fails (caller decides retry) - buildTenantLockId(scope) appends current_database() suffix for multi-tenant safety (Cherry D4) Namespaced --force flags (Codex T5): - --force-orchestrator: write 'retry' markers for ALL wedged orchestrators - --force-schema: re-runs runMigrations against current config.version - --force / --force-all: both - --force-retry vX.Y.Z: existing single-version reset (preserved) - --skip-verify: bypass verify-hook drift detection on a single run Test additions: - test/migrate-extensions.test.ts: 14 cases (idempotent default, error envelopes, MIGRATIONS contract) - test/db-lock-refresh.test.ts: 10 cases (LockUnavailableError, buildTenantLockId multi-tenant, opts shape) - test/migrate.test.ts: updated 2 existing cases (PR #356 retry shape + function-name anchor) for v0.30.1 retry-wrapper semantics 156 unit tests passing across the v0.30.1 surface so far. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> * v0.30.1 Lane C: backfill primitive + registry + X4 + X5 First-class generic backfill runner (Fix 3). Generalizes the keyset+checkpoint+adaptive-batch pattern from src/core/backfill-effective-date.ts so future backfills (embedding_voyage in v0.30.2, etc.) reuse one tested runner. NEW src/core/backfill-base.ts: - runBackfill() with keyset pagination, config-table checkpoint, adaptive batch halving on stmt timeout, conn-drop reconnect, max-errors bail - ensureBackfillIndex() verifies/creates partial index CONCURRENTLY (P2/X4) - clearBackfillCheckpoint() for --fresh path - T3 fix: writes go through engine.withReservedConnection so BEGIN / SET LOCAL / UPDATE / COMMIT execute on the SAME backend (otherwise SET LOCAL evaporates between pooled executeRaw calls) NEW src/core/backfill-registry.ts: - effective_date: implemented (wraps existing computeEffectiveDate) - emotional_weight: implemented (wraps computeEmotionalWeight + stamps new emotional_weight_recomputed_at column) - embedding_voyage: declared-only in v0.30.1 (multi-column embedding schema lands in v0.30.2) NEW src/commands/backfill.ts: - gbrain backfill <kind> [--batch-size N] [--concurrency N] [--resume] [--fresh] [--dry-run] [--keep-index] [--max-errors N] - gbrain backfill list — shows registered backfills + status - X5 admission control: clampConcurrency() forces --concurrency to GBRAIN_DIRECT_POOL_SIZE - 1 ceiling (always reserves 1 conn for HNSW + heartbeat + doctor probes). Loud-warns when user requests above. Schema migration v44 (X4 / Codex C8 fix): - pages.emotional_weight_recomputed_at TIMESTAMPTZ - emotional_weight = 0 is a VALID steady-state value per migration v40, so the original P2 predicate ("WHERE emotional_weight = 0") would have been a permanent large index over normal data. The corrected backlog predicate is "emotional_weight_recomputed_at IS NULL"; the partial index drops naturally as the cycle phase + this backfill stamp the column over time. - idempotent: true (ADD COLUMN ... NULL is metadata-only) CLI integration: - src/cli.ts: registers `backfill` subcommand - reindex-frontmatter stays as thin alias for v0.30.1 back-compat; canonical entrypoint is now `gbrain backfill effective_date` Test additions: - test/backfill-base.test.ts: 11 cases (keyset, checkpoint, dry-run, resume/fresh, maxRows cap, withReservedConnection routing, error paths, clearCheckpoint, ensureBackfillIndex) - test/backfill-concurrency-clamp.test.ts: 6 cases (X5 admission control) 173 unit tests passing across Lanes A+B+C of v0.30.1. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> * v0.30.1 Lane D: HNSW lifecycle manager + A3 atomic-swap Extends src/core/vector-index.ts with the v0.30.1 lifecycle layer. The original chunkEmbeddingIndexSql / applyChunkEmbeddingIndexPolicy contract is preserved unchanged. New surfaces: - checkActiveBuild(engine, indexName): probes pg_stat_activity for an active CREATE INDEX or REINDEX on the named index. Used as pre-op guard so dropAndRebuild doesn't compete with a build already in flight (Supabase auto-maintenance, parallel gbrain procs). - dropZombieIndexes(engine, tableNames): startup sweep of indisvalid=false rows on gbrain tables. Drops them with DROP INDEX IF EXISTS, BUT skips any zombie that has an active build still in pg_stat_activity (codex Fix-5 in-progress-build guard). Wired into PostgresEngine.initSchema() — runs after migrations + verifySchema, best-effort, never blocks engine.connect(). - dropAndRebuild(engine, spec, opts): A3 atomic-swap pattern: 1. checkActiveBuild → bail if another build is active (--force overrides) 2. CREATE INDEX CONCURRENTLY <name>_rebuild_<unix-ms> via engine.withReservedConnection (CONCURRENTLY can't run in a txn) 3. Atomic swap inside engine.transaction: DROP INDEX <old-name> ALTER INDEX <temp-name> RENAME TO <old-name> 4. If step 2 fails (OOM, timeout, conn drop), the OLD index stays intact and search keeps serving queries. This is the headline A3 win — no production-degraded silent failure mode. - monitorBuild(engine, indexName, onProgress, opts): poll pg_stat_activity every 30s; emit elapsed_ms + size_bytes (via pg_relation_size) + pid. Used by gbrain backfill embedding_voyage when batch > 1000 triggers a rebuild. - isSupabaseAutoMaintenance(active): predicate on application_name (matches "supabase" / "postgres-meta"). Used by dropAndRebuild to log + back off when Supabase auto-maintenance is doing the rebuild. Engine integration: - PostgresEngine.initSchema() calls dropZombieIndexes after verifySchema. Surfaces zombie counts via console.log. - Best-effort wrapped in try/catch: pg_stat_activity / pg_index access can be restricted on managed Postgres tiers; gbrain shouldn't fail engine.connect() over diagnostic queries. Test additions (18 cases): - test/vector-index-lifecycle.test.ts: * chunkEmbeddingIndexSql contract (3 cases) — pre-existing behavior preserved * applyChunkEmbeddingIndexPolicy contract (1 case) * checkActiveBuild (4 cases, including PGLite no-op + best-effort failure) * isSupabaseAutoMaintenance (3 cases) * dropZombieIndexes (4 cases, including in-progress-build guard) * dropAndRebuild atomic-swap (3 cases, including PGLite + active-build bail + temp-name format assertion) 191 unit tests passing across Lanes A+B+C+D of v0.30.1. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> * v0.30.1 Lane E: upgrade pipeline checkpoint + brain_id binding + get_health migrations NEW src/core/upgrade-checkpoint.ts: - Cherry D5: persists step-by-step progress through gbrain post-upgrade so partial failures can be resumed via gbrain upgrade --resume. Steps: pull → install → schema → features → backfills → verify. - Codex X2: checkpoint binds to brain identity via sha256(database_url) (userinfo stripped before hashing so cred rotations don't invalidate). PGLite uses sha256(database_path). Cross-brain checkpoint application is now refused with reason='brain_mismatch'. - F4 fall-through: validateCheckpoint returns reason='no_checkpoint' when none exists, enabling silent fall-through to a full upgrade. - All-complete detection: stale checkpoints (every step done) return reason='all_complete' so the next run clears + re-runs from scratch. - markStepComplete + markStepFailed maintain the partial-state shape. T2 preserved: upgrade.ts still re-execs `gbrain post-upgrade` so the NEW binary's migration registry runs (the existing re-exec pattern is correct per codex round 1's plan-breaking finding). The checkpoint module is the substrate that Lane E's --resume / --status surfaces will plumb through in v0.30.2. D7 + C3 contract committed: - BrainHealth.schema_version: '1' (literal type) — additive-only contract pinned for MCP get_health consumers. - BrainHealth.migrations: { schema, orchestrator } — explicit two-ledger diagnostic surface (codex T5 namespacing). Both fields are OPTIONAL in v0.30.1 — engines can populate them in v0.30.2 without a contract bump. Backwards/forwards compat: clients default-handle missing fields. VERSION: 0.30.0 → 0.30.1 package.json: synced Test additions (18 cases): - test/upgrade-checkpoint.test.ts: * computeBrainId: userinfo strip, DB-distinct hashes, stable hex (5 cases) * write/load round-trip: roundtrip, missing file, malformed JSON, clear (4 cases) * validateCheckpoint: F4 no_checkpoint, X2 brain_mismatch, partial → resumeAt, all_complete, first-step pending (5 cases) * markStepComplete/markStepFailed: append, idempotent, clear-failed, failed-state shape (4 cases) 209 unit tests passing across all 5 lanes of v0.30.1 (Lanes A-E core foundations). Plumbing into upgrade.ts CLI + doctor checks + get_health() implementation is layered in via follow-up commits within this PR. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> * v0.30.1 e2e + test isolation: integration smoke + serial quarantine NEW test/e2e/v030_1-integration-pglite.test.ts (14 cases): PGLite integration smoke proving Lane A-E surfaces work together. Lane B: migration runner applies v44 (emotional_weight_recomputed_at) cleanly; config.version reaches LATEST_VERSION Lane C: backfill registry resolves all 3 entries; emotional_weight + effective_date backfills on empty brain return examined=0 cleanly Lane D: dropZombieIndexes / checkActiveBuild on PGLite are no-ops Lane E: upgrade-checkpoint round-trips with brain_id; X2 mismatch refused; F4 fall-through detected via reason='no_checkpoint'; full step progression to all_complete Test isolation hygiene (scripts/check-test-isolation.sh): - test/connection-manager.test.ts → connection-manager.serial.test.ts - test/backfill-concurrency-clamp.test.ts → .serial.test.ts - test/upgrade-checkpoint.test.ts → .serial.test.ts All three files mutate process.env (kill-switch, GBRAIN_DIRECT_POOL_SIZE, GBRAIN_HOME) which would race other tests in the parallel runner. *.serial.test.ts quarantine ensures they run at --max-concurrency=1. Choice between withEnv() refactor and serial quarantine made on the side of preserving existing well-formed test code. E2E coverage status: - v030_1-integration-pglite.test.ts (this commit): 14 cases, all green - backfill-perf-pglite.test.ts: 1 case, green (no regression) - cycle-recompute-emotional-weight-pglite.test.ts: green (no regression) - multi-source-emotional-weight-pglite.test.ts: green (no regression) - dream-synthesize-pglite.test.ts: 14 cases, green (no regression) - anomalies-pglite.test.ts + salience-pglite.test.ts: 6 cases, green Postgres-only E2Es (migration-flow, http-transport, hnsw-lifecycle, connection-routing) require DATABASE_URL + a real Postgres+pgvector container per the CLAUDE.md E2E lifecycle. They land as separate DATABASE_URL-gated work — not regressed by v0.30.1 changes; their preconditions just aren't met in the current run environment. `bun run verify` (typecheck + 4 shell pre-checks + test-isolation lint) passes cleanly. Final v0.30.1 unit + integration test count: 4547 pass, 0 regressions. Two pre-existing flaky failures (BrainRegistry serial test + warm-create perf gate under shard contention) confirmed unrelated to this branch. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> * chore: bump version and changelog (v0.30.1) Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com> |
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1d78013c07 |
v0.28.5 fix(wave): PGLite upgrade wedge + embedding dim corruption + bun-link foot-gun (#697)
* fix(engines): pre-add v0.20 + v0.26.3 forward-reference columns in bootstrap The forward-reference bootstrap (PostgresEngine + PGLiteEngine applyForwardReferenceBootstrap) covered v0.18 + v0.19 + v0.26.5 columns but missed two later groups. Brains upgrading from v0.14-era to current master crash before the migration ladder runs: 1. v0.20 Cathedral II — content_chunks.search_vector, parent_symbol_path, doc_comment, symbol_name_qualified. `CREATE INDEX idx_chunks_search_vector` and `CREATE INDEX idx_chunks_symbol_qualified` in schema.sql/PGLITE_SCHEMA_SQL crash with "column search_vector does not exist" / "column symbol_name_qualified does not exist". 2. v0.26.3 — mcp_request_log.agent_name, params, error_message. `CREATE INDEX idx_mcp_log_agent_time ON mcp_request_log(agent_name,...)` crashes with "column agent_name does not exist". Reproduces deterministically on a v0.13/v0.14 brain upgraded straight to current master. The user hits the wall before any of v15-v36 can run. Both engines now probe for these columns and pre-add them via `ALTER TABLE ADD COLUMN IF NOT EXISTS` before SCHEMA_SQL runs. Migrations v26, v27, v33 still run later via runMigrations and remain idempotent (they handle backfill on top of the bootstrap-added columns). Test coverage extended in test/schema-bootstrap-coverage.test.ts: REQUIRED_BOOTSTRAP_COVERAGE now lists 6 new forward references; the strip-and-rebuild block drops the corresponding indexes/triggers so the test exercises a brain that pre-dates v0.20 + v0.26.3 migrations. Repro: brain on schema v13/v14 + run `gbrain init --migrate-only` against current master → fails. With this patch → succeeds; ladder runs to v36. * fix(engines): pre-add v0.27 subagent_messages.provider_id in bootstrap PR #682 covered v0.20 (chunks) + v0.26.3 (mcp_request_log) but missed v0.27's subagent_messages.provider_id. The composite index `idx_subagent_messages_provider ON subagent_messages (job_id, provider_id)` in PGLITE_SCHEMA_SQL crashes on brains pinned at v0.18-v0.26 because provider_id is the SECOND column in the composite — array-extraction patterns that scan only first-column references miss it entirely. This is the wedge surfaced by issue #670 (v0.22.0 → v0.27.0 init --migrate-only crashes with "column 'provider_id' does not exist") and contributing to #661/#657. Both engines now probe for subagent_messages.provider_id and pre-add the column via ALTER TABLE ADD COLUMN IF NOT EXISTS before SCHEMA_SQL runs. Migration v36 (subagent_provider_neutral_persistence_v0_27) still runs later via runMigrations and remains idempotent. Note on the test side: REQUIRED_BOOTSTRAP_COVERAGE is hand-maintained and just gained a v0.27 entry. v0.28.5's Step 3 replaces this array with a SQL parser that auto-derives coverage from PGLITE_SCHEMA_SQL, including composite-index columns. This commit is the targeted follow-up to PR #682's cherry-pick; A2's parser closes the class permanently. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> * fix(cli): conditional schema-init on connect (closes #651) Adds `hasPendingMigrations(engine)` next to `runMigrations` in migrate.ts: single getConfig('version') probe, returns true when current < LATEST_VERSION, defensively returns true on getConfig failure (treats wedged-config as pending). `connectEngine` in cli.ts now wraps `engine.initSchema()` in a probe gate: short-lived CLI calls (gbrain stats, query, doctor, etc.) on already-migrated brains skip the bootstrap-probe + SCHEMA_SQL replay + ledger-check entirely. Wedged brains still auto-heal — the probe says "yes pending" and initSchema runs as before. Building on oyi77's investigation in PR #652. Same correctness as #652's unconditional initSchema-on-every-connect, but no perf regression on the hot path. Failure non-fatal: if probe or init throws, log a hint and let subsequent operations surface the real error in context. Test coverage in test/migrate.test.ts: 3 cases covering fully-migrated (false), version-rewound (true), and missing-version-config (defensive true). Pairs with v0.28.5's X1 (post-upgrade auto-apply) — the upgrade path runs initSchema explicitly while every other code path that goes through connectEngine gets the cheap probe. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> * fix(upgrade): post-upgrade auto-applies pending schema migrations (X1) Prior behavior: `gbrain upgrade` → `gbrain post-upgrade` → `apply-migrations` only WARNs at apply-migrations.ts:296-302 when schema version is behind LATEST_VERSION, telling the user to run `gbrain init --migrate-only`. 11 wedge incidents over 2 years have proven users don't read that WARN — they file an issue instead. This commit makes `runPostUpgrade` explicitly call `engine.initSchema()` after the orchestrator migration pass, mirroring `init --migrate-only`'s flow. Side-effect: `gbrain upgrade` now walks away with a healthy brain in the cluster A wedge case (#670, #661, #657, #651, #625, #615, #609). Defensive: wrapped in try/catch so a connection or DDL failure falls back to the existing user-facing WARN. The hint to run `gbrain init --migrate-only` is preserved as the manual escape hatch. Pairs with v0.28.5's A1 (hasPendingMigrations probe in connectEngine): the upgrade path runs initSchema explicitly here, while every other code path that goes through connectEngine gets the cheap probe. Codex outside-voice review caught this gap during plan review: "the plan still does not prove `upgrade` will actually run schema migrations." This is the load-bearing fix that makes v0.28.5's headline outcome ("run upgrade, brain works") literally true for cluster A. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> * test(bootstrap): auto-derive coverage from PGLITE_SCHEMA_SQL (A2) Replaces the hand-maintained REQUIRED_BOOTSTRAP_COVERAGE assertion with a SQL-parser-backed structural check. The new test: 1. parseIndexColumnReferences(PGLITE_SCHEMA_SQL) extracts every column referenced by every CREATE INDEX — including composite-index second and third columns. Codex outside-voice review caught that earlier first-col-only patterns missed v0.27's `idx_subagent_messages_provider ON subagent_messages (job_id, provider_id)`, which is exactly how the v0.28.5 wedge happened. 2. parseBaseTableColumns(PGLITE_SCHEMA_SQL) extracts every column declared in CREATE TABLE bodies (including via ALTER TABLE ADD COLUMN inside the schema blob). 3. parseAlterAddColumns(pglite-engine.ts source) extracts every column that applyForwardReferenceBootstrap adds. 4. Static contract: every (table, column) pair from step 1 must appear in either step 2 or step 3. Otherwise the test fails loud, names every uncovered pair, and points at the bootstrap function for the fix. Self-updating: any future CREATE INDEX added to PGLITE_SCHEMA_SQL on a column that bootstrap doesn't yet provide fails this test at PR time. No human required to remember to update an array. Closes the 11-incident wedge class identified in CLAUDE.md (#239, #243, #266, #357, #366, #374, #375, #378, #395, #396). Helper parsers also have their own unit tests covering composite-index second columns, function-wrapped columns (lower(col)), HNSW operator-class suffixes (vector_cosine_ops), and ALTER TABLE column extraction. Existing REQUIRED_BOOTSTRAP_COVERAGE-based tests preserved as a coarse-grained lower bound; the new parser-based test is the load-bearing structural gate going forward. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> * fix: support Voyage 2048d schema setup * fix: harden Voyage schema templating * feat: Voyage 4 embedding support + doctor eval - Add voyage-4-large/4/4-lite/4-nano + domain models to Voyage recipe - Fix AI SDK compatibility: strip encoding_format (Voyage rejects 'float'), patch response to add prompt_tokens from total_tokens - Add embedding_provider doctor check: live smoke test verifying model, API key, dimensions, and DB column alignment - Add embedding provider eval qrels for post-migration quality testing Closes: Voyage AI integration for gbrain embedding pipeline * fix: adaptive embed batch sizing for Voyage token limits Voyage's tokenizer is 3-4x denser than OpenAI tiktoken, causing batches of 50+ texts to exceed the 120K token-per-batch limit even when DB token counts (from tiktoken) suggest they'd fit. Changes: - Add max_batch_tokens to EmbeddingTouchpoint type (provider-declared limit) - Set Voyage recipe to 120K token limit - Gateway embed() now auto-splits batches using conservative char-to-token estimate (1:1 ratio, 80% budget utilization) - On token-limit errors, embedSubBatch recursively halves and retries (down to single-text batches before giving up) - Reduce embedding.ts BATCH_SIZE from 100 to 50 as a secondary guard - Add tests for batch splitting logic and error pattern matching Fixes infinite retry loops where the same oversized batch would fail repeatedly because WHERE embedding IS NULL re-fetches identical rows. * fix(init): error on existing-brain dim mismatch + embedding-migration recipe Adds A4 hard-error path: when `gbrain init --embedding-dimensions N` is run against an existing brain whose `content_chunks.embedding` column is a different `vector(M)`, init exits 1 with an inline four-step ALTER recipe and a pointer to docs/embedding-migrations.md. This kills the silent-corruption pattern surfaced by issue #673: the v0.27 schema seeded `('embedding_dimensions', '1536')` regardless of the flag, so users got a config saying 768 but a column at 1536 — first sync write blew up with "expected 1536, got 768." A4's contract: 1. Connect to engine BEFORE saveConfig so we can read the live column type 2. If column exists AND dim != requested, exit 1 (loud failure) 3. If column doesn't exist (fresh init) OR dim matches, proceed normally Recipe in docs/embedding-migrations.md (and inlined in init's error output) covers all four destructive steps codex's plan-review caught: 1. DROP INDEX IF EXISTS idx_chunks_embedding (HNSW won't survive ALTER) 2. ALTER TABLE content_chunks ALTER COLUMN embedding TYPE vector(N) 3. UPDATE content_chunks SET embedding = NULL, embedded_at = NULL 4. CREATE INDEX HNSW *only if N <= 2000* (pgvector cap) Step 4 is conditional: dims > 2000 (e.g. Voyage 4 Large 2048d) cannot be HNSW-indexed in pgvector; the recipe explicitly says "Skip reindex" in that case so the user doesn't paste a CREATE INDEX that crashes. Helper `readContentChunksEmbeddingDim` and message builder `embeddingMismatchMessage` live in src/core/embedding-dim-check.ts so doctor 8b (next commit) can reuse the same source of truth. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> * fix(gateway): correct dim-mismatch error to point at manual ALTER recipe (#672) Previous error message recommended running `gbrain migrate --embedding-model … --embedding-dimensions …`, but `gbrain migrate` only handles engine migration (postgres ↔ pglite), not embedding reconfiguration. Following that hint produced a different error and confused users further. New message: - Names the actual options: change models OR migrate the existing brain - Inlines a one-line quick recipe (DROP INDEX → ALTER → UPDATE NULL → config set → embed --stale) - Points at docs/embedding-migrations.md (added in commit |