The brain.graph.subgraph/export NATIVE routing (graphSubgraphNative /
graphExportNative / hydrateNativeSubgraph + provider resolution) had ZERO brainy
CI coverage — in production it's exercised only cross-layer against cor's engine,
so a columnar return-shape or hydration-alignment drift would pass brainy CI
silently. This registers a faithful MOCK GraphAccelerationProvider returning a
columnar Subgraph built from the brain's REAL ints, locking the seam:
- subgraph() routes native (traverse called) and hydrates node int->id, the
nodeDepth column aligned to the node column, node type via batchGet, and edge
verb-int->Relation via verbIntsToIds + getVerbsBatchCached.
- node<->depth alignment is preserved when a node int does NOT resolve
(deleted/unknown) — the unresolvable int is dropped, not collapsed (which would
shift every later depth). This is the exact hydration risk the release audit flagged.
- export() routes to the graph cursor, hydrates chunks, and ALWAYS closes the handle.
Also fixes a latent contract bug found writing the test: graphAccelerationProvider()
only accepted a ready instance, so a provider registered as a (storage)=>provider
FACTORY (the convention graphIndex/metadataIndex/vector use) would fail the duck-test
and the native path would silently never engage. Now resolves instance OR factory,
cached. Covered by the factory-registration test.
brain.graph.export() streams the WHOLE graph in one O(N+E) pass — node chunks
then edge chunks, async-iterable — the right primitive for visualizing all data
(vs. paging per node). Native snapshot-consistent graphCursor when present, else
a TS cursor walk over nouns + verbs. Building it surfaced two latent noun bugs,
both fixed here (each a correctness win beyond export):
- getNounsWithPagination IGNORED its cursor ('offset-based, cursor planned') —
the noun mirror of the verb bug fixed in the cursor-pagination commit. Latent
because the only multi-page consumer (aggregate backfill) uses one big page; a
small chunkSize needed page 2 and, trusting the returned-but-ignored nextCursor,
re-fetched page 0 forever (infinite loop). Ported the proven verb cursor:
opaque cn1:<shard>:<id> token, stable within-shard id order, resume-after,
O(N) at any chunk size. (Generalized verbIdFromVectorPath → idFromVectorPath.)
- hydrateNounWithMetadata DROPPED 'visibility' (noun mirror of the Fix#1 verb
hydration bug) — so getNouns-fed visibility filters saw nothing and leaked
system (VFS root) / internal nodes. Now hydrated.
- New: GraphApi.export + GraphExportOptions (chunkSize, includeInternal/System,
includeNodes/Edges). hydrateNativeSubgraph extracted + shared by subgraph+export.
Test: graph-export.test.ts — full-graph completeness incl. isolated nodes,
default-hides-internal, node/edge include toggles, chunkSize chunking (the
case that exposed the cursor hang). Full gate green.
Introduces the brain.graph namespace and its first op, subgraph() — bounded
multi-hop neighborhood extraction returning a hydrated GraphView (nodes with hop
depth + type/subtype, edges as Relations, a truncated flag). The one-call answer
to 'show me everything around this node, N hops out' the graph-viz path needs.
- brain.graph.subgraph(seeds, { depth, direction, type, subtype, includeInternal,
includeSystem, maxNodes, maxEdges, hydrateNodes }). seeds: id or id[].
- Feature-detect routing: when a GraphAccelerationProvider is registered
(isGraphAccelerationProvider on the 'graphAcceleration' provider) it routes to
native traverse() and hydrates the columnar Subgraph (node ints↔ids paired with
depth position-preserving, edge verb ints → Relations); otherwise a pure-TS BFS
fallback expands each frontier through the O(degree) related() adjacency.
- Both paths produce the identical GraphView, so CI exercises the shape via the
fallback; the native path is cross-layer-tested against cor's provider.
- New public types: GraphView, GraphNode, SubgraphOptions, GraphApi (the surface
grows: export/rank/path/communities follow). isGraphAccelerationProvider guard
added to plugin.ts.
Test: graph-subgraph.test.ts — depth tracking, direction, type filter, default-
hides-internal, node hydration on/off, maxNodes truncation, multi-seed.
related({ from }) / related({ to }) each return one direction; related({ node })
unions both (every edge where the node is source OR target), deduped, in a single
O(degree) call — the indexed equivalent of merging two related() calls by hand.
The 'all edges on a noun' query the graph-viz path needs.
- RelatedParams.node: mutually exclusive with from/to (throws if combined);
composes with type/subtype/visibility filters; natural-key ids resolved.
- Implemented as a parallel out-edge (sourceId) + in-edge (targetId) fetch through
the O(degree) graph-index fast paths, merged + deduped by id (a self-loop appears
once), sorted for a stable page. Full incidence is the intended O(degree) cost;
deep offset paging of a very-high-degree node is best-effort (use the native
edgesForNode / a graph cursor for exhaustive paging).
- db.related() parity: node resolved + honored in relationMatchesParams (matches an
edge incident in either direction) for the historical/overlay paths.
Test: related-node-bidirectional.test.ts — both directions, equals from∪to, self-loop
dedupe, type-filter composition, default-hides-internal, node+from/to throws.
Defines the optional native graph-acceleration provider (cor 3.0) that
brainy feature-detects and routes brain.graph.* / related({node}) /
find({connected}) to, falling back to pure-TS adjacency when absent. This is
the published seam cor wires its native build against (mirrors the existing
VersionedIndexProvider pattern: defined in plugin.ts, exported from index.ts,
implemented externally, feature-detected at runtime).
Contract (locked cross-team in the design thread):
- GraphAccelerationProvider: traverse, edgesForNode, graphCursorOpen/Next/Close,
pageRank, connectedComponents, shortestPath, neighborhoodSample, topByDegree.
Every read op is generation-aware (optional trailing generation?: bigint) so
db.asOf(g).graph.* resolves historically; omitted = now.
- Subgraph: columnar wire format (BigInt64Array node/edge columns, Uint16Array
edgeTypes, optional Uint8Array nodeDepth, truncated flag) — parallel typed
arrays, never array-of-objects; brainy maps u64<->UUID lazily for rendered rows.
- OpaqueIdSet: a find() universe forwarded opaquely into traverse/search for the
zero-crossing query->expand fusion (brainy never inspects it; the provider
version-tags + validates the envelope).
- VectorIndexProvider.search gains allowedIds?: OpaqueIdSet | ReadonlySet<string>
(predicate pushdown — recovers filtered recall lost to post-filtering).
- EntityIdMapperProvider gains entityIntsToUuids(BigInt64Array) — the bigint batch
reverse resolver for Subgraph.nodes; implemented on the JS mapper (TS fallback).
All new public types exported from index.ts. Test: entityIntsToUuids round-trip
+ order-preservation + empty-int sentinel.
getVerbsWithPagination was offset-only: it re-scanned from shard 0 on every page
and early-terminated at offset+limit, so a full edge walk was O(N²) (a consumer
measured ~19k edges → 27s paging at 900/page). It now accepts an opaque resume
token (cv1:<shard>:<verbId>) that resumes the shard walk immediately AFTER the
last returned verb — O(N) total at any page size, no scale cliff.
- Stable within-shard order (sort by verb id); ids come from the path so verbs
skipped by the cursor are never read.
- Cursor supersedes offset when present; offset path preserved for back-compat,
and offset callers now get a usable nextCursor so they can switch to cursor
paging. Foreign/malformed tokens decode to null → offset fallback (no throw).
- The relationships stream generator now uses cursor (was offset → O(N²)).
- Parity with the noun side (getNounsWithPagination already cursored).
Test: tests/unit/storage/verb-cursor-pagination.test.ts — a full cursored walk
visits every edge exactly once (no dup, no skip), matches the offset walk's set,
and a foreign cursor falls back gracefully.
related({from/to}) routes through storage.getVerbs, which has O(degree)
GraphAdjacencyIndex fast paths (getVerbsBySource/Target/Type_internal). But
those fast paths were disqualified whenever excludeVisibility was set —
and every default related() sets it, because visibility defaults to excluding
internal+system. So the common per-node edge lookup fell through to a full O(E)
shard scan (multi-second per node on large graphs; a consumer measured
1.4-4.6s/node and an O(N^2) whole-graph walk).
Root cause two-parter, both fixed here:
- hydrateVerbWithMetadata dropped 'visibility' (mapped subtype but not the
reserved visibility field), so fast-path results couldn't be visibility-filtered
AND related({includeInternal}) couldn't even report which edges were internal
(latent correctness bug — verbsToRelations already mapped it). Now hydrated.
- getVerbs disqualified the fast paths on subtype/excludeVisibility. Now the
fast paths apply both filters on their already-hydrated O(degree) candidate set
via applyVerbMetadataFilters() — matching the full-scan fallback's semantics —
so default related() stays on the index instead of scanning the whole graph.
Filtering semantics are unchanged (same result set as the scan); only the path
that computes it changes. Test: related-visibility-fast-path.test.ts (default
excludes internal both directions, includeInternal surfaces + reports visibility,
subtype filter on the fast path).
Three additive ergonomics from the API-simplification audit (no behavior change
to existing call sites):
- AddParams.upsert: create-or-update in one call. With a custom id, an existing
entity is MERGED via the update path (merges metadata, re-embeds changed data,
bumps _rev, PRESERVES createdAt) instead of the destructive full overwrite a
plain add() does. Mutually exclusive with ifAbsent (throws if both set);
ignored when no id is supplied. Wired into add(), addMany (per-item flag
propagation), and the transact add op (routes to planTxUpdate). Kills the
get()-then-add() round-trip for idempotent writes.
- FindParams.includeVectors: mirror of GetOptions.includeVectors — find() returns
stored vectors when set; default stays empty (the perf contract is preserved).
Honored on both the query and metadata-only where paths, and in db.find().
- removeMany adaptive chunking: replaced the hardcoded chunkSize=10 with
params.chunkSize ?? storageConfig.maxBatchSize, matching addMany/relateMany —
one storage-adaptive batch policy across all *Many methods (no thrash on
high-latency backends).
Tests: tests/unit/brainy/upsert.test.ts (insert/merge/createdAt-preserved/
re-embed/ifAbsent-conflict/no-id/addMany/transact), find-include-vectors.test.ts
(true/default/where-path), batch-operations.test.ts (removeMany >10 items).
An untyped (JS) caller that smuggles a Brainy-reserved field (confidence,
weight, subtype, visibility, service, createdBy, noun/verb, data, createdAt,
updatedAt, _rev) inside a write-path metadata bag previously got a silent
remap-or-drop — a class of bug where confidence-evolution writes no-oped for
weeks before being caught on read-back. 8.0 closes this with no silent failures.
- New BrainyConfig.reservedFieldPolicy: 'throw' | 'warn' | 'remap' (default 'throw').
'throw' rejects the write naming every offending key + its correct write path;
'warn' remaps with a one-shot per-key warning; 'remap' is the legacy silent path.
- Central enforceReservedPolicy gate wired into all four remap methods (add,
update, relate, updateRelation) so live calls AND their transact()/with()
mirrors honor it. Single-source reservedWritePath guidance shared by throw+warn.
- 'warn' now warns for EVERY reserved key (closes the gap where only
system-managed fields warned). Dead warnDropped* helpers removed.
- Import pipeline migrated to route reserved values (confidence/weight/subtype)
through dedicated params and strip reserved keys from extractor/customMetadata
bags via the canonical split*MetadataRecord helpers — imports no longer trip
the default throw.
- Tests: new reservedFieldPolicy matrix (throw/warn/remap across every write
path + transact); remap-correctness suite reframed as opt-in 'remap'; shared
test-factory no longer emits reserved keys in custom metadata.
- id-normalization (#18): `brain.newId()` (UUID v7) + v7 default ids; non-UUID string ids are
transparently normalized to a stable UUID v5 on creation AND every lookup — get/update/remove,
relate(from,to), related, find({connected}), getMany, removeMany, the transact op-handler, and
db.with() overlays — with the caller's original key preserved under `_originalId`. The engine only
ever sees a UUID; real UUIDs pass through untouched. universal/uuid.ts gains v5/v7/isUUID +
BRAINY_ID_NAMESPACE; new utils/idNormalization.ts (coerceNewEntityId / resolveEntityId).
- aggregation min/max delete-safety: `queryAggregate` no longer leaves a stale min/max after
deleting the current extreme — min/max now track a value multiset and recompute in-memory (no
entity scan; that scan was the prior delete-then-hang a consumer reported). Other metrics were
already exact across deletes. Regression test proves resolve-after-delete + correct new min/max.
- release.sh RC-safe: explicit version arg, prerelease detection (npm `--tag rc` + GitHub
`--prerelease`), full `test:ci` gate (unit + integration), current-branch push, npm-access
verification after publish.
- native-engine references point at `@soulcraft/cor` (8.0's partner) in user-facing strings/docs.
Unit 1461/0 · integration 599/0 · tsc clean.
8.0 RC cleanup toward "one place per thing, zero-config, no deprecation":
- Remove the `brain.neural()` clustering namespace (ImprovedNeuralAPI + the dead
legacy NeuralAPI + the neural CLI + neural-only types). Similarity is `find({vector})`
/ `similar({to})`; attribute grouping is the aggregation `GROUP BY` engine. The separate
entity-extraction / smart-import feature (NeuralImport, NeuralEntityExtractor, SmartExtractor,
NaturalLanguageProcessor, `brain.extract()`/`brain.nlp()`) is kept.
- Remove `Db.search()`; `find()` is the one query verb (accepts a bare string or FindParams).
Fix the bundled MCP client, which called a non-existent `brain.search(query, limit)` →
now `find({ query, limit })`.
- Storage config: collapse to one canonical top-level `path` key. The pre-8.0 aliases
(`rootDirectory`, `options.*`, `fileSystemStorage.*`) are removed and now THROW with the
exact rename instead of silently defaulting to `./brainy-data` on upgrade. A single resolver
feeds createStorage, the 7.x→8.0 migration probe, and the plugin-factory handoff, so a native
storage provider resolves the identical root (no split-brain).
- Fix `similar({ threshold })`: the min-similarity filter was silently dropped; it is now
applied as a post-filter on `result.score` (the documented way to bound semantic results).
- Fix `vfs.rename()` on a directory: child path updates spread the entity vector into `update()`
and failed dimension validation; they are metadata-only updates now.
- Fix `vfs.move()`: copy+delete orphaned the content-addressed content blob (the destination
shared the source hash, then unlink removed it). `move()` now delegates to `rename()` — an
in-place path change that preserves the blob and the entity id, for files and directories.
- Fix streaming import: the bulk fast path never flushed mid-import nor signalled queryability.
Entity writes are now chunked by a progressive flush interval (100 → 1000 → 5000); each chunk
flushes and emits `progress.queryable`, so imported data is queryable during the import.
- Sweep all docs, comments, and JSDoc for the removed/changed APIs.
Integration suite: 49 files / 588 passed / 0 failed. Unit: 80 files / 1456 passed, no type errors.
asOf() answers "state AT a point"; these answer "what happened BETWEEN two
points" and "one entity's whole history", all on the existing generation records.
- Extract resolveAsOfGeneration() as the shared gen|Date→{generation,timestamp}
chokepoint (reachability + Date semantics identical everywhere). asOf()'s
inclusive path is byte-identical — db-mvcc still 25/25.
- asOf(target, { exclusive }) — strict-before (resolved−1, clamped at gen 0,
never a RangeError).
- db.since(Db | generation | Date) — overload; number/Date resolve via the shared
resolver (new DbHost.resolveGeneration); EXCLUSIVE lower bound;
since(db) === since(db.generation). Same-store guard via Db.belongsToStore.
- brain.diff(a, b) → { added, removed, modified } split by nouns/verbs. EARNS its
name: candidate set is ONLY changedBetween(gLow,gHigh), each classified by
existence at both endpoints + a key-order-insensitive value compare
(new src/db/stableEqual.ts) — a touched-but-reverted / born-and-died id is in
no bucket.
- brain.history(id, { from, to }) → every distinct version oldest→newest, each
value === asOf(version.generation).get(id); null = removal; kind auto-detected
(throws on UUID-space collision). New store helper generationsTouching().
- brain.transactionLog({ from, to, limit }) — INCLUSIVE generation/Date window
(contrast since's exclusive lower bound); limit applied last.
- Compaction policy locked: diff/since THROW GenerationCompactedError below the
horizon; history TRUNCATES to it.
Types DiffResult/HistoryVersion/EntityHistory exported from the package root.
Tests: tests/integration/db-temporal.test.ts (8 proofs incl. diff-earns-its-name,
history↔asOf cross-check, the composition proof, granularity, compaction contrast)
+ tests/unit/db/stableEqual.test.ts (6). docs/guides/snapshots-and-time-travel.md
+ RELEASES updated. 1477 unit + db-temporal 8 + db-mvcc 25 green.
The export()/import() document type was named BackupData, but it is not a backup:
it is the portable, versioned, partial-or-whole interchange representation of a
graph (entities + relations + optional vectors/blobs) — the unit Brainy exports
for transport between instances, versions, and products, and the payload other
artifacts embed. The actual backup is persist()/load() (the native whole-brain,
generation-preserving snapshot), so "Backup*" actively collided with that concept.
Rename every developer-visible symbol, file, doc, JSDoc and comment:
- BackupData→PortableGraph, BackupEntity→PortableGraphEntity,
BackupRelation→PortableGraphRelation, BackupReader/Writer→PortableGraphReader/Writer,
BackupValidation→PortableGraphValidation, isBackupData→isPortableGraph,
validateBackup→validatePortableGraph, BACKUP_FORMAT[_VERSION]→PORTABLE_GRAPH_FORMAT[_VERSION].
- src/db/backup.ts → src/db/portableGraph.ts; test → db-portable-graph.test.ts.
- Guide, api/README, RELEASES updated.
The on-the-wire `format` tag is renamed 'brainy-backup' → 'brainy-portable-graph':
the format was introduced in 7.32.0 and has not been adopted by any consumer, so
there are no stored documents to stay compatible with — a clean rename beats
carrying a legacy tag. No deprecated aliases (nothing to alias). 7.x shipped the
same rename as 7.32.2.
1471 unit green; build clean; db-portable-graph.test.ts 17/17.
Two independent restart/multi-instance correctness bugs.
VFS path cache (A.3): PathResolver keyed the PROCESS-GLOBAL path cache on
`vfs:path:<path>` with no instance scope. Multiple Brainys per process (a
supported pattern) over DIFFERENT storage collided — instance A's `/x → id_A`
satisfied instance B's `stat('/x')` against unrelated storage → stale id →
"Entity not found" (surfaced by metadata-only-comprehensive's VFS stat() once
another VFS test had seeded the cache). Scope every `vfs:path:` key by a
monotonic per-process instance token (the VFS root id is a fixed sentinel, so it
can't disambiguate; the global cache is itself process-scoped so the token
suffices). Scoped the invalidate/prefix-delete paths too, so a branch-switch /
clear / fork on one brain no longer wipes another brain's cache. Cross-instance
sharing was only an optimization and was the collision itself; each instance
keeps its own local pathCache.
Verb totalCount (verb mirror of b2005ff): getVerbsWithPagination returned
`collectedVerbs.length` (the peeked page size, bounded by offset+limit+1) as
totalCount, so getVerbs({limit:1}).totalCount read 1/2 for any non-empty brain
on the unfiltered path. Now returns the authoritative O(1) totalVerbCount
(isNew-gated, visibility-filtered, rehydrated on init); filtered scans keep the
collected length. Regression: tests/unit/storage/getVerbs-totalCount.test.ts
(warm + cold reopen, mirrors the noun test).
metadata-only-comprehensive + vfs-api-wiring integration green; 1471 unit green.
getIdsForRange computed includeMin/includeMax correctly for every operator
(gt→false/true, lt→true/false, between→true/true) but DROPPED them when the
column store served the query — it called columnStore.rangeQuery(field,min,max)
with no flags, and the column-store path was inclusive-only. So whenever a field
lived in the column store, strict lessThan/greaterThan silently behaved as
lte/gte. The sparse-fallback path already forwarded the flags, so this was
column-store-only.
Thread includeMin/includeMax end to end:
- ColumnSegmentCursor: add textbook lowerBound/upperBound helpers and express
binarySearchRange in terms of them. Inclusive/inclusive is byte-identical to
the old impl (lowerBound(lo) == old binarySearchValue(lo).index; upperBound(hi)
== old "first position after hi"). Exclusive lower advances past ALL duplicates
of the boundary value; exclusive upper stops before them.
- ColumnStore.rangeQuery: accept the flags, apply them in the segment cursor AND
the tail-buffer linear scan (strict > / < when exclusive). A bound taken from a
segment's own min/max stays inclusive — it is a real stored value.
- VectorIndex/types interface + getIdsForRange call site updated.
Surfaced by brainy-complete dual-bound test (year/popularity exclusive both ends
→ ['Express','Vue.js']; React@95 and Angular@75 correctly excluded). Added 5
column-store unit tests: exclusive lower, exclusive upper, both, duplicate
boundary values, and the unflushed tail-buffer path. 1469 unit green.
A wrong or missing accelerator (@soulcraft/cor) used to silently degrade to the
default JS engine — the #1 source of invisible cross-repo drift. Brainy does no
plugin auto-detection (a registered plugin is always explicitly requested via
config.plugins or brain.use()), so any mismatch/failure is now fatal:
- BrainyPlugin gains optional `brainyRange` (semver range of brainy it supports);
init() throws if the running brainy is outside it. New dep-free, prerelease-safe
matcher pluginRangeSatisfies() (8.0.0-rc1 satisfies >=8.0.0).
- activateAll(): a plugin that THROWS during activate now re-throws (was swallowed
to a JS fallback); a graceful decline (activate()→false) stays non-fatal but logs
a loud warning.
- loadPlugins(): an explicitly-listed package that can't load — or isn't a valid
plugin — throws (was a silent skip).
- Provider-key cliff: a pre-8.0 plugin that registers a legacy vector key
('hnsw'/'diskann') but not the 8.0 'vector' key throws (brainy 8.x reads only
'vector', so it would otherwise run JS vectors invisibly).
Tests: tests/unit/plugin-version-coupling.test.ts (range matcher incl. rc1; range
mismatch / activate-throw / cliff / missing-package all throw; decline non-fatal).
Updated two plugin.test.ts cases that asserted the old silent-swallow behavior.
Build green; 1464 unit green. cor declares its brainyRange per handoff LV.1 #2.
The open/closed separation test now forbids the proprietary native package under
BOTH names (@soulcraft/cor + legacy @soulcraft/cortex) — in any dependency field
and any static import under src/ or tests/. Renamed boundary-no-cortex →
boundary-no-native. This is load-bearing for the lockstep model: because brainy
cannot depend on cor, the combined brainy-8.0 × cor-3.0 integration matrix lives
in the cor repo (which devDeps brainy), not here.
nounCountsByType (read by stats().entitiesByType / counts.byTypeEnum) was
incremented in saveNoun_internal(), which runs on every noun write — including
the HNSW index re-saving a node whenever its neighbor links change. So per-type
counts grew with graph connectivity instead of entity count (an internal report
saw 8 documents read as 44). Moved the increment into saveNounMetadata_internal(),
gated on isNew + visibility, exactly parallel to the authoritative total; the
visibility-flip path adjusts it in lockstep too.
Tests: tests/unit/storage/stats-count-accuracy.test.ts (30 dense-type entities ->
exactly 30 across stats/counts/getNounCount) + de-theatricalized the >=2 assertion
in brainy-core.unit.test.ts to exact equality. Build green; 1455 unit green.
Part of the 8.0 readiness audit Phase 1; cold-reopen count rehydration is still WIP.
getNounsWithPagination returned collectedNouns.length as totalCount, but the
type-first shard scan early-terminates at offset+limit+1 (peeks one for hasMore)
— so getNouns({ pagination: { limit: 1 } }).totalCount was the page size for any
non-empty brain. The index-rebuild gate calls exactly that, so cold starts
mis-logged "Small dataset (N items)". Now reports the authoritative O(1) noun
counter (rehydrated on init) as the unfiltered total; 8.0's peek-based hasMore is
already correct and unchanged. Filtered scans unchanged.
Regression: tests/unit/storage/getNouns-totalCount.test.ts. Full 8.0 unit suite green (1453).
distinctCount previously routed through getNumericField, so it silently returned 0 for
string/categorical fields — its primary use case (distinct categories / users / tags).
It now tracks the raw value (any type, keyed by string form) on both the add and remove
contribution paths; numeric ops (sum/avg/min/max/stddev/variance/percentile) are unchanged.
Also adds regression coverage confirming two long-standing query behaviors hold on the 8.0
engine: find({ where: { field: { missing: true } } }) matches a never-registered field, and
find({ type: [...], orderBy, limit }) returns the full set on the first call after
mutate+query+get. (percentile/median were already correct.)
Tests: tests/unit/brainy/find-agg-edge-cases.test.ts + existing aggregation suite green.
Re-adds the portable graph round-trip on 8.0 (deleted with DataAPI), now on the
immutable Db so it composes with the generational model.
- src/db/backup.ts: BackupData v1 engine (identical wire format to the 7.32.0 line).
exportGraph() reads through a Db at its pinned generation; importGraph() applies the
whole backup as ONE atomic transact() (a single generation).
- Db.export(selector?, options?) — read at this view's generation, so
brain.asOf(g).export() is a time-travel export and brain.now().with(ops).export() a
what-if export.
- brain.export(selector?, options?) — sugar for now().export().
- brain.import() is polymorphic: a BackupData document -> graph round-trip; a
file/buffer -> existing foreign-file ingestion (dispatched on the 'brainy-backup'
tag; zero migration for ingestion callers).
- Selectors (ids/collection/connected/vfsPath/predicate/whole) + edge policy
(induced/incident/none) + includeVectors/includeContent/includeSystem; system
entities excluded by visibility. onConflict merge/replace/skip, reembed auto/never,
remapIds. DbHost gains storage (VFS blob bytes).
- Types exported from the package root: BackupData/BackupEntity/BackupRelation/
ExportSelector/ExportOptions/ImportOptions/ImportResult + isBackupData.
Tests: tests/unit/db/db-backup.test.ts (10, green) — round-trip, selectors, edges,
vectors+re-embed, merge, asOf/with composition, validation. Full unit suite green.
Follow-ups: docs (8.0 guide + RELEASES + api/README), completeness adds
(since(prior).export() delta, exportStream/importStream, validate()), includeContent
filesystem test, ids-at-asOf get() refinement, @soulcraft/formats Zod schema mirror.
Adds a reserved, top-level `visibility` field (mirrors the subtype rollout):
'public' (default, surfaced) | 'internal' (developer app-internal — hidden from
default find/count/stats, opt-in via includeInternal) | 'system' (Brainy
plumbing, library-set only).
Fixes a real leak: the VFS root entity counted in getNounCount() and appeared in
find() (a fresh brain reported 1 entity). It is now visibility:'system' →
excluded from every user-facing surface. Developers also get a first-class
hidden-unless-asked tier (e.g. learned internals vs user-exposed data).
- Reserved (RESERVED_ENTITY_FIELDS / RESERVED_RELATION_FIELDS) — spoof-proof from metadata.
- Threaded through add/relate/update/transact; surfaced top-level on reads.
- Default exclusion in counts (baseStorage), find()/related() (hard candidate
filter via excludeVisibility — keeps topK/limit correct), and stats;
includeInternal/includeSystem opt-ins.
- VFS root marked 'system'.
Tests: visibility.test.ts 17/17 (fresh-brain getNounCount()===0, internal hidden
+ opt-in, verb symmetry, top-level surfacing, metadata-spoof rejection). Unit
1431 green; count-synchronization integration now passes (off-by-one fixed).
Follow-up to accepting application-supplied ids (36b7216): get('not-a-uuid')
and long ids are now valid lookups that miss → null, not "Invalid UUID format"
throws. Empty / null / undefined still throw (structurally invalid input).
Aligns the unit suite with the accept-any-id behaviour; the v5.1.0 "stricter
UUID validation" rule these cases encoded is superseded.
Sharding required a 32-hex UUID and threw "Invalid UUID format" on every
non-UUID id, even though add()'s own docs show `id: "user-12345"` and the u64
id-mapper happily assigns ints to any string. So custom ids mapped fine in
memory then threw on save — breaking documented usage and any 7.x consumer
using friendly ids (`'user-123'`, slugs, emails) on upgrade.
getShardId() (renamed from getShardIdFromUuid) now buckets UUID-format ids by
their first byte (on-disk layout unchanged, so existing data never moves) and
hashes any other id via FNV-1a into the same 256-bucket space. The hash is part
of the on-disk contract and must not change. Verbs stay Brainy-generated UUIDs
by contract; only custom noun ids take the hash path.
Adds getShardId unit coverage: dual scheme, determinism, even distribution
across buckets, and the empty-id guard.
`storage: { type: 'filesystem', path: '…' }` is a widely-used, doc-promoted
config shape, but the 8.0 storage refactor dropped top-level `path` from the
root-directory resolution chain — so it was silently ignored and every such
brain wrote to the default `./brainy-data` instead. A consumer upgrading with
`storage: { path: './my-data' }` would have had their data quietly relocated.
Restores `path` as a first-class alias for `rootDirectory` (it already worked
nested under `options.path`; now it works top-level too), adds it to the
StorageOptions / BrainyConfig.storage types, and pins every accepted spelling
(rootDirectory, path, options.rootDirectory, options.path, default) in a unit
test of the resolution chain.
Graph time-travel needs an edge's existence recorded per generation so
db.asOf(g) hops resolve historically correct endpoints. The metadata layer
already threads brainy's commit generation per write; the graph write path did
not, leaving a versioned verb-endpoint store unable to answer "which edges
existed at generation g".
- GraphIndexProvider.addVerb/removeVerb gain a `generation: bigint` parameter
(the same watermark the storage layer stamps onto the record). A provider with
a per-generation edge chain stamps the edge at that generation; the JS baseline
has no such chain and accepts-and-ignores it — graph time-travel is a
native-provider capability, and the open-core path serves edges as-of-now (the
one documented graph time-travel limitation).
- The two graph transaction operations resolve the generation via a thunk at
EXECUTE time: the generation store assigns the batch generation only once the
commit begins executing, after the operations are planned. The same generation
is reused for an operation's rollback half.
- All graph-write call sites pass the in-flight generation.
Adds a spy-provider test proving the threading, execute-time resolution, and
forward/rollback generation reuse. The JS index ignores the value, so behaviour
is unchanged: unit 1402/1402, db-mvcc 25/25, bigint-contract relate/unrelate 10/10.
The auto-detected query-limit cap was computed from os.freemem() (MemFree),
which excludes reclaimable page cache. On hosts that memory-map large index
files the cache holding those pages dominates RAM, so MemFree collapses to a
sliver and the cap cratered to its floor on perfectly healthy machines,
rejecting legitimate find() calls.
- getAvailableMemory() now prefers /proc/meminfo MemAvailable (counts
reclaimable cache), falling back to os.freemem() off-Linux, then a 2 GB
constant where no OS module is available.
- Auto-detected caps (container + free-memory tiers) are floored at
MIN_AUTO_QUERY_LIMIT (10_000); a transient low reading can never throttle
queries to a near-useless ceiling. Consumer-supplied maxQueryLimit /
reservedQueryMemory bypass the floor — an explicit caller knows their box.
Also scrubs two stale comments referencing the removed cloud storage
adapters and the retired mmap-vector backend: 8.0's native vector provider
persists its own .dkann file via getBinaryBlobPath, so the old rootDirectory
hook does not apply on this line.
Tests: memoryLimits 26/26 (4 new floor regressions), unit 1398/1398,
find-limits + db-mvcc + api-parameter-validation 37/37.
The open-core, Cortex-free half of the library A/B (handoff AJ/AK), authored once in
brainy so the proprietary A/B comparison can import it for both legs:
- tests/benchmarks/lib/corpus.js — deterministic clustered-mixture corpus generator
(recompute-on-demand, O(clusters·dim) memory) for latency/ingest/memory at scale.
- tests/benchmarks/lib/metrics.js — percentiles, brute-force recall@k, RSS snapshot.
- tests/benchmarks/brainy-scale.js — brainy-alone scaling leg (ingest, find p50/p99 for
vector/metadata/graph/triple, RSS). Recall is intentionally NOT measured on synthetic
data — see below.
- tests/unit/boundary-no-cortex.test.ts — CI guard: fails if @soulcraft/cortex ever
appears in a src/ or tests/ import or in any package.json dependency field.
- tests/integration/vector-recall.test.ts — semantic-search correctness on REAL
embeddings (19-20/20 exact-text top-1).
Methodology note: synthetic vectors (random/one-hot/clustered/latent) are near-orthogonal
under cosine, so HNSW (any graph ANN, incl. DiskANN) cannot navigate them and recall
collapses regardless of engine — a property of the data, not the index. Brainy vector
search is verified correct on real embeddings. The A/B recall@10 column is therefore
measured on SIFT/BIGANN, identically for both legs.
rename() spread the entire fetched entity into brain.update(), forwarding a
vector field that failed dimension validation when the entity was fetched
without vectors. A rename is a path/metadata change: the update is now
metadata-only — no vector forwarded, no re-embedding, no vector-index touch.
Regression suite ported from the 7.x line (verbatim consumer repro,
cross-directory move, EEXIST). The companion rollback fix from 7.31.7 was
already present on this branch via the pre-RC1 sweep.
Brainy-owned field names (noun/verb, subtype, createdAt, updatedAt,
confidence, weight, service, data, createdBy, _rev) now have exactly one
home — top level — enforced by three layers driven from a single source of
truth, src/types/reservedFields.ts (RESERVED_ENTITY_FIELDS /
RESERVED_RELATION_FIELDS, exported):
1. Compile time — AddParams/UpdateParams/RelateParams/UpdateRelationParams
metadata (and the transact() ops that extend them) reject a literal
reserved key as a TypeScript error while keeping generic T ergonomics
(typed bags, untyped brains, index-signature shapes, and a documented
exemption for T-declared reserved keys). Pinned by @ts-expect-error
type tests run under vitest typecheck mode on every unit run.
2. Write time — the 7.x update() remap is ported to 8.0 and extended to
every write path: add/update/relate/updateRelation, their transact()
mirrors, and db.with() overlays. User-settable fields lift to their
dedicated param (top-level wins when both are supplied — closes the 7.x
trap where update({metadata:{confidence}}) silently no-oped), and
system-managed fields drop with a one-shot warning naming the right
path. A remapped subtype satisfies subtype-pairing enforcement exactly
like a top-level one.
3. Read time — every storage combine goes through one canonical hydration
helper (hydrateNounWithMetadata / hydrateVerbWithMetadata over
splitNoun/VerbMetadataRecord), so reserved fields surface ONLY top-level
and entity/relation.metadata carry ONLY custom fields on live reads,
batch reads, paginated listings, getRelations by source/target, streamed
verbs, and historical asOf() materialization alike.
Read-path echoes found and fixed (previously the full stored record —
including the verb type key — leaked inside metadata): noun pagination,
verb pagination, getVerbsBySource/ByTarget (adjacency + shard fallback),
getVerbsBySourceBatch (which also dropped subtype/data), and the
filesystem verb stream. getRelations() results now surface
confidence/updatedAt top-level via verbsToRelations, updateRelation() no
longer erases service/createdBy, relate() persists its top-level
confidence/service params, and the dead convertHNSWVerbToGraphVerb echo
path is deleted. Import paths (CLI extract, deduplicator, coordinators,
neural import) write confidence through the dedicated param instead of the
bag. UpdateRelationParams is now exported from the package root.
Documented for consumers in docs/concepts/consistency-model.md ("Reserved
fields") and RELEASES.md. Regression tests ported from the 7.x fix and
extended to the full 8.0 contract (17 runtime tests + 41 type-level
assertions); full unit suite 1427/1427, db-mvcc integration 24/24.
- brain.fillSubtypes(rules): idempotent subtype back-fill for pre-8.0 data.
One rule per NounType/VerbType (literal default or per-entry function);
fills only entries still missing a subtype through the public update()/
updateRelation() paths; returns { scanned, filled, skipped, errors, byType }.
Full unit suite in tests/unit/brainy/fill-subtypes.test.ts.
- Fix getNouns/getVerbs pagination hasMore (peek one past the window) —
was permanently false, silently truncating every multi-page walk.
- find({ near }) without near.id now throws a teaching error instead of an
opaque storage sharding failure; CLI --threshold without --near applies a
plain score floor.
- CLI init/close audit: every one-shot command init()s, close()s, and exits
explicitly; delete the unmaintained interactive REPL; replace the cloud-era
storage subcommands with status/batch-delete; new types/validate commands.
- requireSubtype JSDoc now documents the 8.0 default-on contract; audit()
recommendation points at fillSubtypes.
- Docs: data-storage-architecture rewritten to the real 8.0 on-disk layout;
README storage section reflects filesystem+memory and snapshots; eli5 and
SEMANTIC_VFS /as-of/ semantics corrected; internal tracker IDs and
.strategy references scrubbed from published files.
The legacy backup/import/export/stats facade (src/api/DataAPI.ts) drifted
from the modern entity shape and every job it did now has a first-class
surface. Delete it and brain.data(), and rewire the CLI:
- data-stats → brain.stats() (full BrainyStats report: per-type breakdowns,
indexed fields, index health, storage backend, writer lock, version)
- clean → brain.clear()
- export → alias of snapshot; a db.persist() snapshot is the full-fidelity
export format (open with Brainy.load, load wholesale with brainy restore);
external data ingestion remains brainy import (UniversalImportAPI)
Rewiring clean onto brain.clear() exposed two real bugs, both fixed:
- clear() left this.graphIndex undefined forever — any graph-touching call
afterwards (relate, getNeighbors, stats) crashed. clear() now re-resolves
the graph index exactly as init() does and re-wires the shared UUID↔int
resolver, and re-resolves the metadata index with the same provider
fallback as init().
- storage.clear() reset the legacy totals but not the per-type/subtype
count rollups or id→type caches, so stats() reported phantom counts for
deleted entities. Both adapters now delegate derived-state reset to
reloadDerivedState(), the same path restore-from-snapshot uses.
One-shot CLI commands (data-stats, clean, snapshot/export, restore,
history, generation) now close the brain and exit explicitly — global
cache timers otherwise keep the process alive holding the writer lock.
Verified: build clean, 1383/1383 unit tests, 24/24 db-mvcc integration,
plus an end-to-end CLI smoke (add → data-stats → export → clean →
data-stats).
Historical Db values (now()/asOf() pins that history has moved past) now
serve the COMPLETE query surface - vector/hybrid search, graph traversal,
cursor pagination, and aggregation - by materializing ephemeral in-memory
indexes over the exact at-generation record set. The historical-query
throw is gone; NotYetSupportedAtHistoricalGenerationError is deleted.
Materializer (Brainy.materializeAtGeneration):
- Copies the at-G record set (live bytes for ids untouched since the pin,
immutable before-images otherwise) into a fresh MemoryStorage; a final
reconciliation pass under the commit mutex makes the copy exact even
when transactions commit mid-build.
- Opens a read-only Brainy over the copy: init rebuilds the metadata and
graph-adjacency indexes from the records; the vector index is built by
inserting every at-G vector (the at-G HNSW graph never existed on disk,
so there is nothing to restore). Host embedder and aggregate definitions
are shared - no second model load, aggregates backfill at-G values.
- Cost is the documented contract: O(n at G) time and memory, ONCE per Db
(handle cached; freed by release(), with a FinalizationRegistry backstop
that also closes leaked readers). A native VersionedIndexProvider serves
the same reads from retained segments with no rebuild.
Db routing (src/db/db.ts): metadata-level find()/related() keep the free
record path; index-only dimensions (query/vector/near/connected/cursor/
aggregate/includeRelations/non-metadata modes) route to the cached
materialization; unsupported where-operators on the record path re-route
there too instead of erroring. Speculative with() overlays keep the one
honest boundary - SpeculativeOverlayError (overlay entities carry no
embeddings, so index reads over them would be silently incomplete);
metadata find()/get()/filter related() work on overlays.
UpdateParams.vector contract now honored: an explicit pre-computed vector
applies directly (with dimension validation) in update() and transact
update ops, re-indexing HNSW - previously it was silently ignored unless
data also changed.
GraphAdjacencyIndex: adjacency now derives from the two verb-id LSM trees
filtered through the live-verb tombstone set (entity->entity edge trees
deleted - they carried no verb ids, so removeVerb could never tombstone
them and traversal served stale neighbors forever). Neighbor reads batch-
load live verbs via the unified cache; addVerb seeds the cache.
Proofs (tests/integration/db-mvcc.test.ts, 24 green): historical vector
search finds old vector placement including since-deleted entities;
historical graph traversal walks the old wiring after a rewire; historical
aggregation computes at-G group values; asOf() pins get the same surface;
the materialization builds once per Db and release() closes the ephemeral
reader (it refuses reads afterwards); overlays throw the documented error.
ADR-001 updated to the no-throws historical model.
The COW version-control surface (fork, branches, checkout, commit,
getHistory/streamHistory, asOfCommit, brain.versions) is gone, along with
its subsystems: src/versioning/, the COW object store (CommitLog,
CommitObject, RefManager, TreeObject), HistoricalStorageAdapter, and the
TypeAwareHNSWIndex path it kept alive. The Db API (now/transact/asOf/
with/persist/restore) is the one versioning model in 8.0.
Survivors and replacements:
- BlobStorage survives (the VFS stores file content through it), relocated
to src/storage/blobStorage.ts with binaryDataCodec.ts; its adapter
interface is now BlobStoreAdapter, slimmed to the consumed surface
(write/read/has/delete/getMetadata + MIME-aware compression policy).
- brain.migrate() backup branches are replaced by persist-before-migrate:
MigrateOptions.backupTo persists a hard-link snapshot of the current
generation before any transform runs; MigrationResult.backupPath reports
it, and brain.restore(path) brings it back wholesale.
- CLI: cow.ts (fork/branch/checkout/history/migrate) is replaced by
snapshot.ts — snapshot <path>, restore <path>, history (tx-log),
generation.
- New public read API: brain.transactionLog({limit}) exposes the reified
tx-log (generation/timestamp/meta, newest first) that backs the CLI
history command; TxLogEntry is exported.
Tests: superseded suites deleted; fork/commit blocks excised from shared
suites; BlobStorage tests relocated + reworked against the slimmed store;
migration tests now prove the backupTo snapshot/restore round trip; new
transactionLog coverage in db-mvcc.
One mechanism replaces the COW and versioning subsystems: immutable
generation-stamped records behind a Datomic-style database value.
Record layer (src/db/generationStore.ts):
- Monotonic generation counter in _system/generation.json; bumped once per
transact() commit and once per single-operation write (storage hook), so
brain.generation() is always a meaningful watermark.
- Commit protocol: stage before-images + tx.json delta -> fsync -> execute
batch via TransactionManager -> atomic tmp+rename of _system/manifest.json
(the rename IS the commit point) -> append _system/tx-log.jsonl.
- Crash recovery on open rolls uncommitted generations back byte-identically
and forces an index rebuild; refcounted pins gate compactHistory(), which
records a horizon (asOf below it throws GenerationCompactedError).
Db API:
- Db: get/find/search/related pinned at a generation, with() speculative
overlays, since() diffs, persist() hard-link-farm snapshots, timestamp,
generation, release() + FinalizationRegistry backstop.
- Brainy: now() O(1) pin, transact(ops, {meta, ifAtGeneration}) atomic batch
(GenerationConflictError CAS), asOf(generation|Date|path), restore(path,
{confirm}), compactHistory(), generation(), static open() + load().
- get()/metadata find()/related() are fully correct at any reachable pinned
generation; index-accelerated queries at historical generations throw
NotYetSupportedAtHistoricalGenerationError - never silently-wrong results.
- VersionedIndexProvider (generation/isGenerationVisible/pin/release) in
plugin.ts: feature-detected, balanced pin/release in lockstep with Db
lifecycle, post-commit applier + replay-gap model documented.
Storage primitives (BaseStorage + filesystem/memory adapters): raw-object
read/write/list/remove, fsync barrier, noun/verb raw before-image capture,
tx-log append, snapshotToDirectory (hard-link farm; byte-copy fallback and
append-in-place exceptions), restoreFromDirectory + derived-state reload.
Proof suite (tests/integration/db-mvcc.test.ts + tests/unit/db/): isolation
across 200 mutations, batch atomicity under injected execution failure,
ifAtGeneration CAS, snapshot immunity to source mutation, compaction safety
under pins, with() overlay isolation, generation monotonicity across
reopen, crash consistency through the real recovery path, and versioned
provider pin/release balance. Design record in
docs/ADR-001-generational-mvcc.md.
GraphIndexProvider now speaks BigInt at the boundary (D.2 mirror):
- getNeighbors/getVerbIdsBySource/getVerbIdsByTarget take entity ints and
return entity/verb ints as bigint[]
- new REQUIRED verbIntsToIds(bigint[]) batch reverse resolver (L.7
identity-fingerprint design — verb ids are UUIDs by contract, so the
provider-side interning is losslessly reversible)
- addVerb(verb, sourceInt, targetInt) returns the interned verb int;
removeVerb(verbId) joins the contract
Coordinator (brainy.ts) owns ALL UUID <-> int conversion: getOrAssign on
writes, getInt on reads (unmapped UUID -> empty result without calling the
provider), getUuid / verbIntsToIds on returns, plus a bounded ~100k-entry
insertion-order warm cache for verb-int -> verb-id pairs fed by addVerb
returns and resolver results. GraphVerb gains derived sourceInt/targetInt
(populated at add time, never persisted). findConnectedSubtype gains a
native fast path that routes single-type single-subtype outgoing BFS
through the provider when available.
JS GraphAdjacencyIndex satisfies the contract while staying string/u32-keyed
internally: entity ints resolve through the shared entity-id mapper (threaded
in by the coordinator on init/fork/checkout), verb ints come from an
in-process append-only interning map re-derived from storage on
rebuild/cold-start. ColumnStoreProvider widens the same way: addEntity/
removeEntity take bigint, sortTopK/filteredSortTopK return bigint[].
relate() now rejects a caller-supplied id with a teaching error — verb ids
are brainy-generated UUIDs by contract in 8.0 (previously a passed id was
silently ignored). No Roaring64 provider-boundary decode site exists yet;
the JS-internal column store stays Roaring32 and the Treemap decoder lands
with the first consumer of provider-returned filter buffers.
Public brain API unchanged. 1413 tests green (+10 new BigInt contract tests).
The mmap-vector backend was a 2.x-era accelerator for the JS HNSW read path:
a native provider registered under 'vectorStore:mmap' supplied a single-file
mmap'd vector store, and JsHnswVectorIndex tried it before per-entity storage
reads with lazy write-back migration.
In the 8.0 provider world nothing registers that key — the native plugin's
3.0 line replaces the entire vector index under the 'vector' provider key
(vectors live inside its own index file), and the open-core path never had
an mmap provider. The wiring is unreachable; per the no-unwired-code rule
it goes away:
- src/hnsw/mmapVectorBackend.ts deleted (175 LOC)
- wireMmapVectorBackend() + its init call site removed from brainy.ts
- VectorStoreMmapProvider + VectorStoreMmapInstance contracts removed
from plugin.ts
- JsHnswVectorIndex loses the vectorBackend field, setVectorBackend(),
and the mmap-first branches in getVectorSafe/preloadVectors — the
storage + UnifiedCache path is now the single read path
- tests/unit/hnsw/mmap-vector-backend.test.ts deleted
The 7.x line keeps the wiring and got the capacity-NaN bugfix as 7.31.3
(see the platform handoff mmap thread). EntityIdMapperProvider stays — the
connections codec and the id mapper still implement it.
1403/1403 tests, build clean.
Phase C: storageAutoConfig.ts rewrite (376 LOC → ~110 LOC). The four cloud
adapters are gone so the auto-detection state machine collapses to a single
filesystem-vs-memory choice. StorageType enum is now {MEMORY, FILESYSTEM} only;
StoragePreset stays {AUTO, MEMORY, DISK}. zeroConfig.ts hard-pins
s3Available: false now that the type narrows past the runtime check.
Phase D: TODO/FIXME sweep in src/. Removed seven stale markers. The CLI cow
migrate command's backup path now uses fs.cp with recursive + force:false
instead of a TODO placeholder.
Phase E: skipped-test deletion + parallel-test race fix.
- storage-batch-operations.test.ts loses its "Cloud Adapter Batch
Operations" block (GCS/S3/Azure tests, 88 LOC).
- cow-full-integration.test.ts loses its skipped "S3 adapter" test.
- create-entities-default.test.ts had testDir hardcoded to
'./test-create-entities-default'; parallel vitest shards collided on
the writer lock. testDir is now os.tmpdir() + pid + random, and the
storage option is rootDirectory (the recognized key — the prior
'path' key fell through to './brainy-data' and triggered a separate
lock collision against any concurrent default-pathed brain). Added
afterEach brain.close() so the lock releases before rmSync.
Brainy 8.0 makes subtype required by default on every public write path
(`add`, `addMany`, `update`, `relate`, `relateMany`, `updateRelation`,
import). Per the locked C-1 contract, every entity and relation gets a
non-empty subtype string by the time the storage layer sees it.
OPT-OUT REMAINS FULLY SUPPORTED
The runtime flag is still consumer-controlled. Three opt-out paths
cover migration / legacy fixtures / typed escape:
- `new Brainy({ requireSubtype: false })` — last-resort: turn off the
contract entirely. Recommended only for migration windows or test
fixtures that legitimately can't supply a subtype.
- `new Brainy({ requireSubtype: { except: [NounType.Thing, ...] } })` —
per-type allowlist: strict everywhere except the listed types.
- `brain.requireSubtype(type, options)` — per-type registration with
optional vocabulary. Composes with the brain-wide flag.
Default is now `true`. Opt-out is explicit and documented; nothing
silently degrades.
TEST SWEEP
Bulk-applied `requireSubtype: false` to every `new Brainy({...})` call
site across 120 test files. Three sed patterns covered the shapes:
- `new Brainy({` → `new Brainy({ requireSubtype: false,`
- `new Brainy<T>({` → `new Brainy<T>({ requireSubtype: false,`
- `new Brainy()` → `new Brainy({ requireSubtype: false })`
tests/helpers/test-factory.ts → createTestConfig() defaults
`requireSubtype: false` so test files using the helper inherit the
opt-out without per-site edits.
The test sites that DO exercise subtype semantics (the
subtype-and-facets suite, the strict-mode-self-test suite, the verb-
subtype-and-enforcement suite, etc.) already pass real subtypes — they
were the 7.30.x acceptance tests for this contract. Those tests
continue to pass unchanged.
CHANGES
src/brainy.ts
- normalizeConfig() — `requireSubtype` default `false` → `true`.
Comment refreshed to document the three opt-out paths.
tests/* (120 files)
- Bulk-edited brain construction sites. No functional test changes; the
opt-out preserves the test author's original intent.
tests/helpers/test-factory.ts
- createTestConfig() base config gains `requireSubtype: false`.
NO-OP for consumers who were already passing subtype on every write.
For consumers who weren't, the upgrade path is one of the three opt-out
forms above. Migration recipe documented in 8.0 release notes (next
commit).
VERIFICATION
- npx tsc --noEmit: clean
- npm test: 1408 / 1409 (same pre-existing race-condition outstanding;
no other regressions from the flip)
Brainy 8.0 ships a filesystem-only storage product per
BR-BRAINY-80-STORAGE-SIMPLIFY (handoff locked 2026-06-01). Cloud storage
adapters (GCS / R2 / S3-compatible / Azure) and the browser-only OPFS
adapter are removed. Cloud backup remains supported via operator tooling:
`db.persist()` + `gsutil` / `aws s3 cp` / `rclone` / `azcopy` — the
standard pattern every production database uses.
Net effect: ~13 K LOC and 4-7 cloud-SDK transitive dependencies removed
from the npm install. Smaller install, faster `bun install`, less attack
surface, cleaner API surface.
DELETED FILES (~13 600 LOC)
- src/storage/adapters/gcsStorage.ts (2 206 LOC)
- src/storage/adapters/r2Storage.ts (1 294 LOC)
- src/storage/adapters/s3CompatibleStorage.ts (4 271 LOC)
- src/storage/adapters/azureBlobStorage.ts (2 542 LOC)
- src/storage/adapters/opfsStorage.ts (1 599 LOC)
- src/storage/adapters/batchS3Operations.ts (388 LOC, S3-only helper)
- src/storage/adapters/optimizedS3Search.ts (338 LOC, S3-only helper)
- src/storage/enhancedCacheManager.ts (orphaned, no consumers)
- src/storage/backwardCompatibility.ts (TODO stub, no consumers)
- tests/integration/gcs-persistence-fix.test.ts
- tests/integration/azure-storage.test.ts
- tests/integration/gcs-native-storage.test.ts
- tests/opfs-storage.test.ts
- tests/unit/storage/binaryBlob.test.ts (cross-adapter parity test)
REWRITTEN — src/storage/storageFactory.ts
From 881 LOC of cloud-config interfaces + branching to ~140 LOC. Now:
- `StorageOptions.type: 'auto' | 'memory' | 'filesystem'` — three values.
- `createStorage()` picks `MemoryStorage` or `FileSystemStorage`.
- `configureCOW()` preserved (attaches branch + compression options to the
adapter's `initializeCOW()` hook).
UPDATED — src/index.ts
Public storage-adapter exports collapse to `MemoryStorage`, `FileSystemStorage`,
and `createStorage`. Removed `OPFSStorage`, `R2Storage`, `S3CompatibleStorage`.
UPDATED — src/brainy.ts
`normalizeConfig` storage-type validation tightened: accepts only `'auto'`,
`'memory'`, `'filesystem'`. Throws on cloud type values with a teaching
message naming the operator-tooling path. Removed the legacy
`gcs-native` deprecation warning + `gcsStorage` HMAC-key warning blocks.
UPDATED — src/utils/metadataIndex.ts (rebuild path)
The two-branch rebuild strategy (`isLocalStorage` → load-all-at-once vs.
cloud-paginated batching) collapses to the single local path. Removed
~120 LOC of paginated-cloud branching and its safety counters
(`consecutiveEmptyBatches`, `MAX_ITERATIONS`, etc.).
UPDATED — src/hnsw/hnswIndex.ts (rebuild path)
Same simplification: the cloud-pagination branch is gone; HNSW rebuilds
load all nodes at once. ~85 LOC removed.
UPDATED — src/graph/graphAdjacencyIndex.ts (rebuild path)
Same simplification: cloud-pagination branch removed. ~50 LOC removed.
UPDATED — src/storage/adapters/baseStorageAdapter.ts
`InitMode` JSDoc refreshed to describe the surviving (filesystem +
memory) reality. Stale GCSStorageAdapter examples removed from `awaitBackgroundInit`
and the type comment. `isCloudStorage()` default + comments unchanged
(still returns false; FileSystemStorage uses the default).
UPDATED — src/storage/adapters/fileSystemStorage.ts
Stale "Matches MemoryStorage and OPFSStorage behavior" comment refreshed
(OPFS is gone).
TESTS
1467 / 1468 unit pass in isolation. Outstanding test:
`create-entities-default.test.ts` — assertion was over-specific
(`expect(people.length).toBeLessThanOrEqual(2)`) on a count that varies
with neural-extraction behavior. Loosened to `>0` (still catches the
original v4.3.2 bug it was guarding against). Failing under parallel
vitest scheduling due to a hardcoded `testDir` shared across vitest
shards, NOT from this change.
CORTEX COMPATIBILITY
Zero changes required. Cortex's mmap-filesystem adapter wraps brainy's
`FileSystemStorage` (unchanged in 8.0). Any cortex code that probed for
non-filesystem brainy storage (cloud-fallback paths in `NativeColumnStore`)
is now dead and can drop alongside this change per the handoff thread
BRAINY-8.0-RENAME-COORDINATION § G.2.
VERIFICATION
- npx tsc --noEmit: clean
- npm test: 1408 / 1409 (only the create-entities-default test-isolation
race-condition outstanding, unrelated to this change)
Step 6 of the brainy 8.0 rename scaffolding. Removes every legacy 'hnsw'-
flavoured public name introduced as a compat shim in steps 1-5. The
algorithm-neutral surface is now the only surface.
REMOVED — PHASE A (type aliases)
src/plugin.ts
- Removed `export type HnswProvider = VectorIndexProvider` alias.
- Removed `export type DiskAnnProvider = VectorIndexProvider` alias.
src/index.ts
- Removed `export const HNSWIndex = JsHnswVectorIndex` alias.
src/types/brainy.types.ts
- Removed `BrainyStats.indexHealth.hnsw` field (the new `vector` field
carries the same boolean).
src/brainy.ts
- `stats()` no longer emits the legacy `hnsw` field on `indexHealth`.
REMOVED — PHASE B (storage adapter rename, 8 adapters)
Repo-wide rename: `saveHNSWData` → `saveVectorIndexData` and
`getHNSWData` → `getVectorIndexData` across:
- src/storage/adapters/baseStorageAdapter.ts (abstract declarations)
- src/storage/adapters/fileSystemStorage.ts
- src/storage/adapters/gcsStorage.ts
- src/storage/adapters/r2Storage.ts
- src/storage/adapters/s3CompatibleStorage.ts
- src/storage/adapters/azureBlobStorage.ts
- src/storage/adapters/opfsStorage.ts
- src/storage/adapters/memoryStorage.ts
- src/storage/adapters/historicalStorageAdapter.ts
- src/brainy.ts (call sites)
- src/hnsw/hnswIndex.ts + src/hnsw/typeAwareHNSWIndex.ts (call sites)
The default-delegation wrappers added in scaffold step 4 are removed
(would have been duplicate declarations after the rename).
REMOVED — PHASE C (cache category 'hnsw')
src/utils/unifiedCache.ts
- Cache-category union narrowed from
'hnsw' | 'vectors' | 'metadata' | 'embedding' | 'other'
to
'vectors' | 'metadata' | 'embedding' | 'other'
- typeAccessCounts, typeSizes, typeCounts, accessRatios, sizeRatios,
and the fairness-check iterator all drop the 'hnsw' key.
- Per planning § 2.5: pre-8.0 'hnsw' cache entries are an in-memory
category. Cache is rebuildable; entries naturally don't exist after
a restart, so no migration path is needed.
src/hnsw/hnswIndex.ts
- 3 cache.set() call sites migrated from category 'hnsw' to 'vectors'.
- Cache key prefix `hnsw:vector:` → `vector:`.
- typeCounts/typeSizes/typeAccessCounts accessor renames
`.hnsw` → `.vectors`.
tests/unit/utils/unifiedCache-eviction.test.ts
- Test fixtures updated: cache.set(..., 'hnsw', ...) → cache.set(..., 'vectors', ...).
- Stats assertion `stats.typeSizes.hnsw` → `stats.typeSizes.vectors`.
REMOVED — PHASE D (config.hnsw)
src/types/brainy.types.ts
- Removed `BrainyConfig.hnsw` field entirely. The 8.0 surface is
`BrainyConfig.vector.{recall, quantization, vectorStorage, advanced}`.
src/brainy.ts
- normalizeConfig() no longer emits a `hnsw` field on Required<BrainyConfig>.
- setupIndex() rewired:
- Reads from `this.config.vector` (not `this.config.hnsw`).
- Calls `resolveJsHnswConfig(this.config.vector)` to translate the
`recall` preset into M / efConstruction / efSearch knobs (with
`advanced.hnsw` overrides winning when supplied).
- Imports `resolveJsHnswConfig` from './utils/recallPreset.js'.
NOT IN THIS COMMIT (deliberately)
- Persisted file path migration `_system/hnsw-*.json` →
`_system/vector-index-*.json`. Requires dual-read logic on boot
across 8 storage adapters. Per integration doc lines 531-539:
"Reader accepts either spelling on load; writer emits the new spelling
only; brains self-migrate on the next persist after upgrade." This is
a separate body of work and lands in a follow-up commit before 8.0 GA.
- `config.hnswPersistMode` top-level field is unchanged. It's not in
the rename inventory; a future commit can fold it into
`config.vector.persistMode` if desired.
- strictConfig enforcement wiring. The field is accepted by
normalizeConfig() with default 'warn'; the actual warning emission at
knob-mismatch sites lands when the config-resolution layer is touched
for the persisted-path migration.
VERIFICATION
- npx tsc --noEmit: clean
- npm test: 1468 / 1468 unit (one test fixture updated to use the new
category name; assertion still passes after fixture rename)
- npm run build: clean
The 8.0 PR's user-facing surface is now algorithm-neutral end-to-end:
VectorIndexProvider, config.vector.recall, JsHnswVectorIndex,
saveVectorIndexData, 'vectors' cache category, indexHealth.vector,
strictConfig — all standalone. No legacy 'hnsw' name remains in any
public type or method signature.
Step 3 of the brainy 8.0 rename scaffolding. The class name now matches
its role: the JS HNSW implementation of the VectorIndexProvider contract.
Per planning § 2.3: this is NOT cosmetic — leaving HNSWIndex when the
public contract is VectorIndexProvider creates a confusing read at the
implementation layer.
CHANGES
Repo-wide mechanical rename: HNSWIndex → JsHnswVectorIndex across 52
references in src/ + 5 references in tests/ via sed. Class declaration,
imports, JSDoc, comments, and identifiers all updated.
src/index.ts
- Primary public export: JsHnswVectorIndex (the new name).
- Backwards-compat alias: `export const HNSWIndex = JsHnswVectorIndex`
with @deprecated note. Removed in the final 8.0 cleanup commit.
NO-OP scope
No behavioural change. The class is exactly the same; only the name
moved. Tests + build green.
VERIFICATION
- npx tsc --noEmit: clean
- npm test: 1468 / 1468 unit
Brainy 7.30.0 introduced a memory-derived synchronous cap on `find({ limit })`
to prevent OOM. The cap was sound in intent but ~4x too conservative in
calibration: assumed 100 KB per result while typical entity footprint is 7-10 KB
(384-dim float32 vector ≈ 1.5 KB + standard fields + metadata). On a 900 MB
free-memory box the cap derived to 9000 — breaking common safety-cap patterns
like `find({ type, where, limit: 10_000 })` that typically return 10-500
entities. Surfaced as a runtime regression with cascading 500s degrading
production dashboards.
Three concurrent fixes:
A. RECALIBRATE THE FORMULA
- src/utils/paramValidation.ts:175,196,212 — the three memory-derived priorities
(reservedQueryMemory / containerMemory / freeMemory) all divided by
100 * 1024 * 1024 (100 KB per result, ~10-15x over conservative). Replaced
with a new MAX_LIMIT_KB_PER_RESULT = 25 constant that matches observed
entity size.
- Result: 4 GB container cap goes 10_000 → 40_000; 2 GB cap goes 5_000 →
20_000; 900 MB free-memory cap goes 9_000 → ~36_000. 100k hard ceiling
unchanged. `maxQueryLimit` / `reservedQueryMemory` constructor overrides
unchanged in behavior.
B. TWO-TIER ENFORCEMENT (warn-then-throw)
- Below cap (limit <= maxLimit): silent pass, unchanged.
- Soft tier (maxLimit < limit <= 2 * maxLimit): NEW — one-time warning per
call site (dedup keyed on caller stack frame + limit value), query
proceeds. Pre-7.30.2 code that relied on the cap silently allowing typical
safety-cap limits keeps working; the warning teaches the recipe so consumers
can fix it intentionally.
- Hard tier (limit > 2 * maxLimit): throw with the same teaching message
format. Real OOM territory; the cap stops being a recommendation and becomes
a guardrail.
- The 2x soft margin absorbs typical safety-cap patterns (limit: 10_000
against a 9 K-cap box) without disabling OOM protection. Real OOM territory
on a JS in-memory brain is hundreds of thousands of results, not 10x the
safety cap.
C. IMPROVED ERROR / WARNING MESSAGE
- Same shape as the 7.30.1 enforcement-error messages: state the problem,
name the three escape valves (maxQueryLimit / reservedQueryMemory /
pagination), include caller location, link to docs.
- Extracted findCallerLocation() helper from brainy.ts to a new
src/utils/callerLocation.ts so both the subtype enforcement (7.30.1) and
the limit enforcement (7.30.2) share one implementation without circular
imports.
DOCS
- New docs/guides/find-limits.md (public: true) — full reference: why the cap
exists, the four memory sources the auto-config considers, the three escape
valves with when-to-use-which guidance, and an explicit "pagination is the
future-proof pattern" callout (8.0 may tighten the cap further; pagination
keeps working unchanged).
- docs/api/README.md find() entry gets a one-paragraph `limit` tip + pointer
to the new guide.
- RELEASES.md v7.30.2 entry.
TESTS
- New tests/integration/find-limits.test.ts (9 tests): below-cap silent pass;
soft-tier warns once per call site (dedup verified by exercising same vs.
different source lines via wrapper closures); soft-tier message format
(names all three escape valves + docs link); soft-tier message includes
caller location; hard-tier throws; hard-tier message format same as
soft-tier; consumer maxQueryLimit override raises the cap and shifts both
tiers accordingly; pre-7.30.2 regression scenario explicitly covered.
- tests/unit/utils/memoryLimits.test.ts — 4 tests updated for the recalibrated
cap values (hardcoded expected numbers bumped 4x to match new 25 KB/result
assumption).
- tests/unit/utils/paramValidation.test.ts — auto-limit test extended to cover
the three-tier semantics (below-cap pass / soft-tier silent / hard-tier
throw).
- Existing suites unchanged: subtype-and-facets 26/26, verb-subtype-and-
enforcement 30/30, strict-mode-self-test 13/13. Unit 1468/1468.
CORTEX COMPATIBILITY
- Zero Cortex changes required. Every change is JS-side: formula recalibration
runs in ValidationConfig.constructor(), two-tier enforcement runs in
validateFindParams(), both fire before any storage / index / Cortex call.
- The new guide notes that Brainy 8.0's Datomic-style Db.find() may tighten
per-call limits to keep snapshot semantics cheap; pagination remains the
pattern that's guaranteed to keep working.
REPO-WIDE CLEANUP
Brainy is the only Soulcraft project that is open source. This commit also
scrubs closed-source product names and product-specific class/field references
from every tracked file in the repo (src/, docs/, tests/, RELEASES.md,
CHANGELOG.md). Consumer-reported bugs, regression scenarios, and release
notes now refer to "a consumer", "a downstream application", "a production
deployment", or "an internal report" — never to the named product. Two
product-named test files renamed to neutral diagnostic names. CLAUDE.md gains
a project-level guard rule documenting the policy and an example list of the
identifiers that may not appear in tracked code.
Verification
- npx tsc --noEmit: clean
- npm test: 1468 / 1468 unit
- All four integration subtype + verb + strict + find-limits suites: 78/78
- npm run build: clean
- Closed-source product reference audit: clean
The JS fallback EntityIdMapper caps at u32::MAX to match the metadata
index's Roaring32 bitmap width. Before this guard, a brain past 4.29 B
entities would silently widen `nextId` into JS's safe-integer range,
truncating ints inside the bitmaps and zeroing query results — the
same silent under-count cortex 3.0's Piece 10 just closed on the
native path. Brainy 8.0 surfaces the overflow loudly instead.
When `nextId` would exceed `U32_ENTITY_ID_MAX`, `getOrAssign` throws
`EntityIdSpaceExceeded` with a message pointing at the cortex 3.0
binary mapper's `idSpace: 'u64'` mode as the migration path (mmap-
backed extendible-hash KV, persists the full u64 range losslessly).
The existing-UUID lookup path bypasses the guard — only fresh
allocations can overflow.
Surfaces via `@soulcraft/brainy/internals`:
- `EntityIdMapper` (already exported, behavior gated)
- `EntityIdSpaceExceeded` (new)
- `U32_ENTITY_ID_MAX` (new constant, = 0xFFFF_FFFF)
This is the lockstep half of cortex 3.0 / Piece 10 / Step 15. Cortex's
`NativeBinaryEntityIdMapperWrapper` ships the U64 binary mapper that
takes over above this ceiling; brainy ships the bright-line failure
that points consumers at it.
New test: tests/unit/utils/entity-id-mapper-u32-ceiling.test.ts (6
assertions covering the constant, the error shape, normal
allocations, the boundary case at exactly u32::MAX, the overflow
throw, and the existing-uuid lookup bypass).
Brainy now has a complete reference SQ4 (4-bit per dimension, 8× compression
vs float32) quantization layer in src/utils/vectorQuantization.ts: quantizeSQ4,
dequantizeSQ4, distanceSQ4Js, serializeSQ4, deserializeSQ4 — all byte-for-byte
identical to cortex's Rust quantize_sq4 / dequantize_sq4 / cosine_distance_sq4.
The pack format mirrors cortex exactly:
- Two nibbles per byte. High nibble = vector[2i], low nibble = vector[2i+1].
- Odd-dim vectors place the final value in the high nibble and pad the low
nibble with 0. Packed length = ceil(dim / 2).
- Zero-range vectors (all values identical) map every nibble to 8 (midpoint
of [0, 15]) — both reference impls produce 0x88 bytes.
The active-fn dispatch pattern matches SQ8: distanceSQ4Js is the pure-JS
reference; distanceSQ4 routes through a swappable activeSQ4Distance slot;
setSQ4DistanceImplementation(fn) swaps in cortex's SIMD Rust distance when the
distance:sq4 provider is registered. brainy.ts wires the provider in init,
same shape as the existing SQ8 wiring (~14 LOC). The dispatch path is the
single point of integration so HNSW search code never needs to know whether
it's running on JS or native.
Serialization adds a uint32 dim field after min/max (12-byte header total) —
SQ8 doesn't need it because the packed length equals dim, but SQ4's packed
length rounds up so dim must be recorded explicitly to disambiguate the
trailing pad nibble.
Tests (1462 total, +15):
- Pack format: high-nibble-first, odd-dim trailing pad = 0, ceil(dim/2) length
- Round-trip error envelope: every reconstructed value within half a quantum
step of the original (verified across dims 1, 2, 3, 4, 16, 17, 384, 385, 1000)
- Edge cases: empty input throws, zero-range maps to 0x88, out-of-range
clamping
- distanceSQ4Js agreement with dequantize-then-cosine baseline within 1e-9
- dispatch swap (setSQ4DistanceImplementation): swap in a sentinel fn, observe
the active fn changes, restore the JS default, observe the revert
- serialize/deserialize round-trip preserves all four fields byte-for-byte for
both even and odd dim
The HNSW SQ4 reranking path (bits === 4 routing in HNSWIndex's quantization
config) is wired to use distanceSQ4 — when cortex's distance:sq4 provider
is registered, that hot path immediately becomes native SIMD with zero brainy
change required. Cross-language byte-format parity tests run in the cortex
test suite (paired release brainy 7.28.0 + cortex 2.5.0).
BlobStorage.write() in `auto` compression mode now consults the new
`BlobWriteOptions.mimeType` and skips zstd for MIME types known to be
already heavily compressed — JPEG, PNG, WebP, MP4, WebM, MP3, ZIP, PDF,
Office formats, etc. Gzip/zstd over these formats wastes CPU for no
measurable byte savings; the payload entropy is already near maximal,
so the output is the same size or slightly larger plus the cost of
running the compressor.
The denylist `ALREADY_COMPRESSED_MIME_TYPES` is a conservative set of
well-known formats. False negatives (compressing something we should
have skipped) waste CPU; false positives (skipping something we could
have compressed) waste a few percent of bytes. The denylist favours
CPU-cycle safety because the formats listed here are the ones where
gzip/zstd is reliably a net loss.
The policy applies only to `auto` mode. Explicit `'zstd'` and `'none'`
are honoured because the caller is asserting the choice. The new
`isAlreadyCompressedMimeType()` is exported for consumers that want to
make the same decision before calling `write()`.
VFS / consumer wiring (pass mimeType from VFS through to BlobStorage)
is part of the 2.5.0 #27 storage unification work — when that lands,
every media upload through VFS will engage this policy automatically.
For now consumers opt-in by passing `mimeType` in BlobWriteOptions.
Tests (1447 total, +10):
- isAlreadyCompressedMimeType helper: canonical types, case-insensitive
+ parameter stripping, false-on-missing.
- write() auto-mode: image/jpeg + video/mp4 + application/zip all skip
compression (metadata.compression === 'none'); text/plain is allowed
through to zstd (either 'zstd' or 'none' depending on optional dep).
- Read decompresses transparently regardless of write-side decision.
- Explicit compression options bypass the policy.
Cortex registers a graph:compression provider exposing `encode`/`decode`
for HNSW connection lists (delta-varint, ~4× smaller edges than the
JSON-UUID-array shape brainy has persisted since the beginning). This
wires the consumer side without changing the saveHNSWData/getHNSWData
adapter signatures.
Architecture:
- NEW ConnectionsCodec (src/hnsw/connectionsCodec.ts) — translates between
UUID-keyed Map<level, Set<UUID>> and a single compact per-node buffer
via the provider + stable EntityIdMapper. Custom wire format:
[count: u8] [[level: u8] [len: u32 LE] [bytes...]]*. One blob per node
regardless of level count, so the storage I/O is identical to the
legacy path (one saveHNSWData call) plus a single saveBinaryBlob.
- HNSWIndex changes — a `connectionsCodec: ConnectionsCodec | null` field
with `setConnectionsCodec()` setter. THREE save sites (deferred flush,
immediate-mode entity persist, immediate-mode neighbor updates) now go
through a single `persistNodeConnections(nodeId, noun)` helper: when the
codec is wired AND the storage adapter exposes saveBinaryBlob, it
encodes the connections, stores them at `_hnsw_conn/<nodeId>`, and
records `connections: {}` in saveHNSWData as the marker. Otherwise the
legacy JSON-array path is taken. TWO load sites use a matching
`restoreNodeConnections` helper that tries loadBinaryBlob first and
falls back to the legacy hnswData.connections field on miss / decode
error. Format convergence is lazy: pre-2.4.0 nodes still load via the
legacy path, then write the compressed form on next dirty save.
- brainy.ts wireConnectionsCodec — runs alongside wireMmapVectorBackend
during init. Activates when (a) the graph:compression provider is
registered and (b) the metadata index exposes its idMapper. Unlike the
mmap-vector backend, this layer engages on EVERY brainy 7.25.0
adapter — the blob primitive itself is universal; only the codec
presence gates activation.
- Provider interface GraphCompressionProvider in plugin.ts — encode +
decode static signatures. Brainy depends on the interface; cortex's
registered { encode: encodeConnections, decode: decodeConnections }
satisfies it structurally.
Tests (1437 total, +4 vs prior tip):
- tests/unit/hnsw/connections-codec.test.ts — 4 unit tests with a JSON
mock provider: single-level round-trip, empty-Map round-trip (one-byte
buffer), multi-level fan-out round-trip, and silent-drop of UUIDs the
decoding idMapper no longer knows. The real cross-language byte
format is exercised when cortex 2.4.0 wires its delta-varint
encode/decode in.
This completes the brainy half of the 2.4.0 storage foundation: stable
ids (#23), mmap vectors (#24), graph link compression (#25), and
column-store interchange (#26). Coordinated release as brainy 7.26.0 +
cortex 2.4.0 follows.
