The engine-pair seam law: a zero-norm vector never crosses an engine
boundary. The index belt already refused to insert one, but the canonical
write and the vectored-noun ledger still counted it, so a near-empty store
whose only vectored row was zero-norm read "1 canonical vectored vs 0
indexed" and threw a not-ready error at open, and a store's own legacy
zero-norm VFS root could trip the same gate before its VFS-init-time cure
ever ran.
- add()/update() (single and transact()) now normalize an explicit
real all-zero vector to the unvectored [] shape before the dimension
pin, the ledger flag, and the index ops ever see it (loud, one warn per
write, canonical write still succeeds).
- The legacy counts.json derivation walk (scanVectoredNounCount) excludes
a persisted zero-norm row, matching the live ledger's definition.
- A legacy zero-norm VFS root now migrates at open, before the vector-leg
gate evaluates, via one O(1) fixed-path read (torn-tolerant — skips
rather than aborting init on a torn root, letting the recovery walk
heal it) — independent of whether a VirtualFileSystem is ever
constructed this session.
- update({ id, vector: [] }) (and the same op inside transact()) is now
the sanctioned, idempotent unvector door: index removal, exactly-once
ledger decrement, no re-embed, and it clears a pending deferred-embed
marker rather than leaving it to re-vectorize the row later. The
combination with deferEmbedding is a typed refusal.
- JsHnswVectorIndex.rebuild() now skips a zero-norm/empty persisted
vector when repopulating from canonical (the same belt the live
add/replace paths already had), and health()'s index-parity check now
compares HNSW size against the vectored-noun ledger rather than the
raw metadata-entry count, since a store's VFS root is permanently
unvectored by design.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
A canonical row persisted with vector: [] (a system row, a deferred embed
not yet landed, or any other legitimately-unvectored record) is a normal,
enumerable row -- but rebuild()'s storage walk had no guard against it.
storage.getVectorIndexData() derives its answer from the row's own record,
so it returns non-null for any existing noun whether or not that noun was
ever actually indexed -- rebuild() admitted such rows into the live graph
with a length-0 vector. A vector-less node could become the entry point (or
occupy any graph position); the next real insert then ran a distance
calculation against it and blew up with a dimension mismatch.
Fix at two layers in src/hnsw/hnswIndex.ts:
- rebuild() now skips any row whose vector.length === 0 before it ever
becomes a graph node (one summary count line, never per-row spam), and
restores the pinned dimension from the first real vector it loads --
previously the pin stayed null across a restart, since addItem/updateItem
are the only sites that set it and rebuild() never goes through either.
- addItem/updateItem now refuse a length-0 vector with a typed
EmptyVectorIndexError instead of ever pinning dimension to 0 or storing a
vector-less node, so no future fill/rebuild/load path can poison the index
silently. getVectorSafe's lazy-load "not found" check also missed that an
empty array is truthy -- tightened to catch it.
IndexOperations.ts's ReplaceInVectorIndexOperation rollback paths now skip
re-adding an oldVector of length 0 (never a legal index member) instead of
attempting an illegal empty re-insert on rollback.
biography.test.ts's final ledger-exactness assertion assumed every noun the
lane creates is vectored, including the VFS root counted in
vfsBaselineNouns -- but the root is deliberately persisted unvectored.
Corrected the expected formula to exclude it.
Adds tests/integration/index-skips-unvectored.test.ts pinning: rebuild()
indexes only vectored rows with the dimension pinned correctly; clear()
then real adds never trip a dimension mismatch; addItem/updateItem refuse a
length-0 vector; and a crash/repair cycle stays dimension-consistent.
The noun/verb pagination walks (getNounsWithPagination,
getNounIdsWithPagination, getVerbsWithPagination) listed shard contents by
filtering for vectors.json, while the canonical count ledger has always
counted a row by its metadata.json presence alone. A row with metadata and
no vector file was therefore counted by the ledger but never yielded by the
walk — a permanent "counted but invisible" phantom for any downstream
consumer that iterates the walk to account for the ledger's total.
Nouns now enumerate by metadata.json and hydrate the vector leg optionally,
yielding the sanctioned unvectored shape (vector: []) when it's absent.
Verbs enumerate the same way, but a metadata-only verb row can only be fully
reconstructed when sourceId/targetId happen to be recoverable from metadata
(never true for a current production write — those fields live only in the
vector leg); otherwise the row is counted but loudly skipped rather than
fabricated, since a phantom edge with fake endpoints would be worse than the
original defect.
Separately, GenerationStore's recovery-fold replay (replayFact) now applies
preserve-if-absent: a metadata-only after-image replayed over an already-
vectored row carries the existing vector forward instead of deleting it via
writeNounRaw/writeVerbRaw's exact-restore null-means-delete contract (which
must stay exact for transaction-abort rollback). A genuine tombstone still
removes both legs.
A zero-norm vector is lawful inside brainy (cosine distance scores it at
maximum, never a false top hit) but a false attractor for a downstream
engine serving squared-euclidean distance, which cannot tell a real
all-zero vector apart from a legitimate origin point.
- The VFS root now persists with vector [] (the existing "unvectored"
shape) instead of a real all-zero 384-dim placeholder, and is never
routed into the deferred-embed pipeline.
- A one-time migration in the root-init path detects a pre-fix store's
all-zero placeholder root (by norm, not length) and rewrites it to []
through a new sanctioned Brainy method that keeps the canonical
vectored-noun ledger honest and removes the row from the vector index.
- The vector-index write seam (AddToVectorIndexOperation,
ReplaceInVectorIndexOperation, and the generation materializer's direct
insert) now refuses any real all-zero vector before it reaches a
provider, loudly naming the entity, while the canonical write still
lands.
- add()'s dimension-pinning and HNSW-insert gates, and the add-params
validator, now treat any empty vector as carrying no dimension
information, closing a latent trap where an explicit `vector: []`
would have pinned dimensions to 0.
Two builds of the same source tree could publish different artifacts
because buildEmbeddedPatterns.ts and buildTypeEmbeddings.ts stamped
their generated output with new Date().toISOString(). Route both
generators' "Generated:" header and the generatedAt runtime field
through a shared resolver: newest git commit time among the
generator's inputs (script + source data), falling back to the stamp
already present in the previous output when git is unavailable (e.g.
a published tarball build), and finally to a fixed epoch value. Every
fallback logs to stderr so degradation is never silent.
Regenerated both committed output files once so the tree carries
deterministic stamps; no other content changed.
Two cures from the pair's first production adoption, both measured live.
THE READ GATE IS PER-FAMILY. The report-driven gate refused on ANY
provider's not-ready verdict at every read choke point — so a pure
metadata find({ where }) was refused because the VECTOR leg was not
serving, and a deployment's badge reads returned errors for a verdict that
had nothing to do with them. A read may only be refused by the family it
actually consults: metadata reads by the metadata leg (plus graph for a
`connected` filter), vector search by the vector leg, traversal by the
graph leg. Callers name what they need; the existing narration-once-per-
generation and typed-refusal laws are unchanged within a family.
NO RE-EMBED ON UNCHANGED DATA. update() — and its transact() planner —
treated any write that carried `data` as a data change: with
deferEmbedding it queued a landing, and the worker re-embedded and re-landed
a vector for content that had not changed. A host heartbeat re-writing an
unchanged row every few seconds therefore fed a live index-row loop on a
production store. A write carrying the row's current data (structural
compare, key order normalized) is now not a data change: no re-embed, no
deferred landing, no vector rewrite; the metadata write itself still
commits. A real change re-embeds exactly as before.
Pinned in tests/integration/read-gate-scope-and-no-reembed.test.ts — both
pins red-proved against the unfixed code with the production shapes
verbatim. Two health-gate pins that encoded the old brain-global scope are
re-pointed to the family their reads consult.
The coverage denominator the health-by-accounting ratification named for
the vector family — never built until now, and its absence was measured as
the exact outage class it existed to prevent: a migrated store with
canonical vectors and no derived index opened with the vector leg EMPTY,
served [] from vector search with no error, and the report-driven read gate
had nothing to refuse on (the provider's coverage invariant was honestly
unledgered — the denominator was ours to supply).
- getCanonicalCounts() gains vectors: { all } — the count of canonical
nouns holding a REAL vector. Incremented where a vector lands (the
isNew-gated metadata seam for explicit vectors — the same discipline that
keeps HNSW neighbor-link re-saves from inflating counts; a narrow
noteVectorLanded hook for the deferred-embed landing, gated on the
worker's own pre-embed read). Decremented on a proven delete of a
vectored noun; a vector-uncertain delete marks the ledger suspect rather
than guessing (no new reads on the delete path). Recounted by the
sanctioned recount; legacy counts.json derives it once (a deferred noun's
vector file exists with an empty vector, so presence requires one
content read at derivation — never on the hot path).
- The open gate's vector leg: when a health-reporting provider claims
serving while the index holds zero nodes and the ledger proves vectored
canonical rows exist, open BUILDS (narrated) — routed through the
provider's idempotent fillFromCanonical() when exposed (the joint door;
a partial shortfall stays repair()'s operator business), the JS rebuild
otherwise — or fails typed pre-serve. Scoped exactly: bare isReady()
providers, migrating providers, and white-box size stubs open as before.
Pinned end-to-end from the partner gate's probe shape (store with vectored
canonical rows, no derived index, reopen → search serves N, never []),
red-proved against the pre-fix path; the inverse (zero vectored rows) opens
without building and serves [] honestly.
resolveVerbEndpointInts mirrors the resolved u64 endpoint ints onto the
verb object itself as BigInt (verb.sourceInt/targetInt) for the graph legs'
own params. The live verb path's delete legs then reused that same object
as the metadata-index crossing — and the seam's metadata is JSON-safe by
contract (a native provider serializes it; u64 as Number corrupts above
2^53), so JSON.stringify threw and the whole transaction aborted. Found by
the first joint pair gate; four downstream suites red from one crossing.
The crossing now routes through a JSON-safe view that drops BigInt-valued
top-level keys — endpoint ints ride their own op params on the graph legs,
exactly as designed, and never the metadata crossing. Applied at the
retraction helper (cascade + unrelate + transact mirrors) and
updateRelation's remove leg.
Pinned by driving the exact shape (relate resolves ints, remove cascades
the same object) through a provider shim enforcing the JSON contract —
red-proved against the unfixed path (the joint gate's verbatim error),
green with the fix.
repairIndex() acted only on heal:'rebuild' — an invariant asking for the
INCREMENTAL heal (re-post exactly what the ledger names, O(missing), never
a store-sized rebuild) did nothing on brainy's side. A failing 'repair'
verdict now routes to the provider's feature-detected repair(); the
post-heal RE-READ of the report decides success (the acceptance meta-pin's
law — run the named heal once, re-read, nothing may still fail the same
way), and a repair that does not converge is recorded with the escalation
named: repairIndex({ rebuild: [family] }).
The factory loudly rejects every REMOVED pre-8.0 path key, but an unknown
nested `config` object (e.g. `storage: { config: { baseDir } }` — a shape
that was never supported) fell through SILENTLY to the zero-config default
directory. Every instance constructed with such a shape wrote to ONE shared
on-disk root while its caller believed each had its own — found live when
two integration tests' brains shared a store across an entire
single-process CI run and a health probe refused on the foreign edges it
sampled. A nested `config` carrying any path-shaped key now throws the same
loud migration error, naming the canonical `path` rename. The two tests are
repaired to the supported shape (and now actually test isolated stores, for
the first time since 8.0).
validateAddParams() treated '' as falsy and rejected it with "Missing
required field 'data'" — so a legitimate empty file's first write always
failed. Only null/undefined data (with no vector either) is genuinely
absent; '' is real content. Fixed the check, plus the identical bug in
validateUpdateParams() (truncating a file to empty via overwrite hit the
same falsy check) and in update()/transact()'s update planner, where a
plain `Boolean(params.data)`/truthy check on the resolved vector would have
silently skipped both the deferred-embed marker and the eager re-embed for
an emptied value — a stale vector with no path to ever correct itself.
Verified end-to-end: vfs.writeFile('/empty.txt', '') now succeeds,
readFile() returns '', the file lists, and stat() reports size 0; the
existing "should reject empty string as data" tests (unit + integration)
asserted the old buggy behavior and are updated to assert the fixed
contract instead.
vfs.readdir()'s ReaddirOptions.recursive was typed but silently ignored: a
recursive request behaved identically to a non-recursive one. Implemented
properly: recursive listing walks every descendant (files and directories,
any depth) via the same graph-traversal + one-batch-fetch path
getTreeStructure()/getDescendants() already use, and reports each entry as
a path relative to the queried directory (Node's fs.readdir(dir,
{ recursive: true }) convention) — 'sub/file.txt', not just 'file.txt'.
With withFileTypes: true, each VFSDirent.name carries that same relative
path when recursive (matching the string-array form byte for byte);
VFSDirent.path stays the absolute VFS path either way, so no information is
lost. Filter/sort/pagination compose unchanged, now over the full recursive
set. Non-recursive behavior (direct children, named by basename) is
unchanged.
A production restart storm measured 90,017ms for a single brain init vs
1,117ms quiet (~80x contention multiplier), traced to performInit() eagerly
awaiting the process-global WASM embedding engine before the VFS root even
existed. Every writer's open() queued on the one throttled model compile
(90-140s on throttled CPUs).
- VirtualFileSystem.doInitializeRoot() no longer embeds '/'. The root is
system-tier plumbing nothing ever searches; when the default WASM engine
is active it now gets an explicit all-zero placeholder vector
(cosineDistance returns max distance for a zero vector, so it never ranks
ahead of real content). deferEmbedding was considered and rejected: its
landing path kicks the embed worker synchronously right after commit,
which would still force the cold compile within milliseconds — just off
the awaited path, not avoided. A registered native 'embeddings' provider
(no cold-start cost, possibly a different dimension) still embeds the
root for real, via the new Brainy.usesDefaultWasmEmbedder() seam.
- performInit()'s eager-embedding step now only STARTS the WASM engine warm
in the background instead of awaiting it inline. embed()/embeddingManager
already serialize concurrent callers on one shared init promise, so the
first real embed() converges correctly either way; a failed warm narrates
loudly instead of surfacing as a silent latency spike or an unhandled
rejection. eagerEmbeddings: false still means no warm at all.
- FileSystemStorage.init() batches its ~8 independent bootstrap mkdirs
(each creates its own full subtree via recursive:true, so none depend on
the others existing) into one Promise.all. The restore-completion step
and initializeCounts() stay strictly sequential — they have real order
dependencies on rootDir and systemDir respectively.
- performInit() now times five phases (storage init / generation-store
open+fold / index init+gate / VFS bootstrap / embedding-warm-started) and
logs one warning with the per-phase breakdown when total open exceeds
2000ms; silent otherwise.
The auto-detection "not installed" heuristic accepted any resolution failure
whose message merely CONTAINED the package name, unterminated — so a missing
platform-binary sibling package (what a deploy replacing node_modules
mid-restart leaves behind) read as "the accelerator is not installed", and
brainy silently served the default WASM engines with zero journal lines. A
production restart storm paid 90 seconds of throttled WASM compile behind
exactly that hole. The name must now terminate where it ends (quote,
whitespace, punctuation, end) — a sibling package, an inner file path, or a
dependency failure is a broken install and init() throws, as the guard's own
law always stated.
Second door: activate() returning false (the documented graceful decline)
warned on console.warn, which `silent: true` patches away — an invisible
degrade. The decline now narrates via the always-on channel.
Also exports CanonicalCounts from the public surface (the coverage-ledger
denominator type consumers read through getCanonicalCounts()).
Pinned in tests/unit/plugin-activation-loudness.test.ts (five error shapes;
the decline warn under silent: true).
Three cures on the JS metadata index, one seam:
- THE CATCHUP WIRING. The index computed its three-way watermark verdict at
open and nothing consumed it — after a crash + adopt reopen, find() served
the pre-crash index while canonical reads and counts recovered (caught by
the lifecycle lane's first run). The open path now consumes the verdict:
'adopt' is a no-op, 'catchup' folds the fact window (stamped, committed]
through the index legs — nouns and verbs, remove-then-add, one mechanism
for add and update — and 'rescan' runs the explicit rebuild, each narrated.
The lane's Ch4–6 release-blocking marker comes off: the contract holds.
Bonus root-cause: close() never stamped the projection watermarks (only
flush() did), so any close without a prior flush verdicted a needless
'rescan' on reopen — both doors now stamp.
- THE LIVE VERB PATH. Verb rows entered the metadata index only via rebuild
walks, so every rebuilt store minted phantom/stale verb postings from its
first live relate(). relate()/unrelate()/updateRelation() and remove()'s
cascade now post/retract the verb's row in the same commit as the graph
leg — transact() planners mirror identically — using the exact record
shape the rebuild walk uses, so live and rebuilt populations agree.
- THE ONLINE REBUILD. rebuild() was clear-then-walk — every metadata read
empty for the duration. rebuildMetadataIndexOnline builds a fresh manager
beside the serving one (shared identity, in-memory build, dual-write via
a shadow seam with zero call-site changes), atomically swaps the
reference, and persists exactly once post-swap. A find() polled ~200x
during a 2k-noun rebuild never dropped below its baseline.
repairIndex({ rebuild: ['metadata'] }) uses it automatically.
The read gate stops consulting the unnamed isReady() boolean: every provider
may expose healthReport() (sync, O(1), composed from exact ledgers —
HealthReport with a monotonic generation, per-invariant source
ledger|deep|unledgered, missing {count, sample}), and one readiness
authority (assessProviderHealth) derives the verdict. Unledgered families
are UNKNOWN — never healthy, never broken; a report that throws is a loud
not-ready, never a shrug. Reads at the four index choke points refuse with
the typed NotReady errors, narrated once per (provider, generation) — a
read NEVER starts a store walk:
- the first-read lazy build retires (open builds instead, regardless of
size — the ≥10k deferral and the "lazy loading on first query" branch go;
disableAutoRebuild is re-meant honestly in its docs);
- the verify*Live read-path rebuild triggers retire (refuse-or-serve);
- the read-time consistency probe that could launch a dark rebuild from an
ordinary find() retires;
- repairIndex({ rebuild: ['metadata'|'graph'|'vector'] | 'all' }) is the
one explicit door: rebuilds the named leg unconditionally and reports
rebuilt per family; bare repairIndex() stays report-driven.
test(lifecycle): the biography lane — a store's whole life, refereed
tests/lifecycle/: an independent shadow model referees every read after
every chapter (founding, a working day, clean restart, crash, repair,
second life). Chapters 1-3 green. Chapters 4-6 assert the true contract and
are marked .fails as a release-blocking finding (the kill-matrix
convention): after a crash + adopt reopen the metadata index computes its
'catchup' watermark verdict and nothing consumes it — find() serves the
pre-crash index while canonical and counts recover. The catchup wiring is
the cure; a passing .fails will force the marker's removal. The lane runs
in the integration gate (config + coverage guard).
A prerelease the other engine devDeps from our own registry while the two
are being proven together must never reach npmjs: --source-only tags, lets
CI publish to The Source, creates the release page, and SKIPS the storefront
publish, the cross-registry verification and the docs push — loudly, at
each step. Refused for a non-prerelease version: a public floor always ships
byte-identical on both registries.
The pin wrote a post-flip row, abandoned the brain as crashed, and then
deleted the row's canonical bytes to prove the first post-flip boot folds
BOUNDED above the flip's stamp. Between the write's ack and the abandon sat
the store's 50ms pending-flush timer: on a loaded box (the plant lane) the
flush won, barrier-synced the row and advanced the checkpoint over it — and
the fold, correctly bounded, did not restore bytes the test had destroyed
after they were stamped durable. Green locally, red on the plant: the
engine was right, the pin was timing-dependent.
The crash is now armed at exactly singleop-after-fact-append: the fact is
appended and at-ack synced, no flush is ever scheduled, the stamp provably
still reads the flip's value when the pre-flip bytes are dropped, and the
post-flip row's bytes — which lived only in the pending tier's RAM — are
lost for real, not synthetically. The reopen must re-materialize it from
its fact and must not restore the pre-flip row.
A validateInvariants() that threw was re-synthesized by the host's catch as
heal:'rebuild' with serving:false — a rebuild lever one transient exception
away, while the native provider's own composer reports the same event as
heal:'none'. Two components disagreeing on what a thrown check means is how
a flaky probe becomes an outage. Both now agree: the report is named
('validate-invariants-threw'), loud (healthy:false, the error in detail),
unverified — and it never buys a rebuild and never withholds serving; the
provider's serving verdict is the provider's to compose, not inferred from a
probe that failed to run. The synthesized report also carries the provider's
name instead of 'unknown'.
RepairFamilyReport gains `missing: {count, sample}` (an exact count plus a
capped id sample — a verdict, not a dump), `rebuilt` (a full generational
rebuild ran, as opposed to an incremental heal) and `reason`, aligning the
receipt's shape with the provider-side health report.
Pinned in tests/unit/validate-invariants-delegation.test.ts.
The storage-level unfiltered getNouns()/getVerbs() walks enumerate every
tier, but their totalCount reported the user-facing scalar, which skips
system/internal records on the write path — so a derived-index coverage
ledger comparing its posted count against that total would read
"over-posted by N" on every store with a VFS. This adds the ledger's real
denominators:
- totalNounCountAll / totalVerbCountAll: +1 for every new canonical record
regardless of tier, −1 for every PROVEN delete (record read, or the
caller's prior image), persisted in counts.json beside the counted
scalars, recomputed by the sanctioned recount (rebuildTypeCounts).
- The unfiltered storage-level totalCount is now the ALL scalar and is
never clamped: Math.max(scalar, scanned) could only move a scalar up, so
an inflated counter hid forever; a divergence is now visible and healed
by repairIndex().
- A delete that cannot prove the record existed never decrements on faith:
it marks the ledger SUSPECT (persisted, narrated once per session) and
the recount clears the flag with proof.
- getCanonicalCounts() on StorageAdapter (optional) exposes {counted, all}
per family plus the suspect flag — O(1), no I/O.
- A counts.json written before the ledger existed derives both scalars
once from the canonical id tree at open and persists them; absent keys
are a legacy file, never a zero.
User-facing getNounCount()/getVerbCount() are unchanged.
Pinned in tests/integration/canonical-count-ledger.test.ts (5 laws).
remove() guarded its index legs with 'if (metadata)': a row whose canonical
metadata was unreadable at delete time kept its postings forever, silently
(the leak class a partner audit confirmed at this exact site). Closed at
all three provider shapes: a provider exposing the id-keyed removal
contract (removeEntityById, arriving with the accelerator's next minor)
gets exact per-entity retraction; the JS index gets id-keyed cleanup
(deleted bitmap + id mapper — field stats reconcile at rebuild), narrated;
a native provider without the contract is NEVER called metadata-omitted
(that path walks the store's value space) — its skip is narrated and
tracked in the degraded set for repairIndex, never silent. The pre-reads
are torn-tolerant: a torn record is deletable (the delete is the cure).
Pinned: a metadata-less row with live postings deletes cleanly and leaves
the query universe; the delete-family suites stay green alongside.
repairIndex() now returns a RepairReport: one row per repair family
(orphaned containers, count rollups, VFS containment, metadata corruption,
write quarantine, each provider's invariant pass, degraded-read state) with
checked / healed counts and an explicit skip reason for anything not run —
no silent rows. A summary line narrates families checked and heals applied.
This is the receipts half of the graph-trust program's ask: a repair that
cannot show its work per store is a repair nobody can audit. Pinned: a
healthy store yields a complete zero-heal receipt with every family
accounted; a manufactured pre-8.3.1 ghost container appears in the receipt
as a counted heal. Additive: void-callers are unaffected.
A production store acked writes while readback served empty for fifteen
minutes. The brainy half: the lazy readiness gate had exactly one caller —
find() — while related() and every VFS path served straight from providers
that init had deferred (disableAutoRebuild on a large store). A false
health verdict from the accelerator pulled the trigger; the unguarded read
surfaces were the gun.
Every index read funnels through three helpers; the gate now lives at those
choke points, so any first read on a cold instance waits for the build and
then serves truth — the fast path after the latch is one boolean. The lazy
build's start is narrated through the production logger, never the
silent-suppressible console: fifteen silent minutes taught that line.
Pinned with the production shape: related() as the first-ever read on a
fresh lazy instance serves the relation; a filtered find serves the row.
Two guards for every gate lane, born from the 2026-08-13 lost-day ledger.
gate-preflight.sh refuses a lane on a machine that cannot be trusted to
produce honest numbers — co-tenant processes named by pid and command, load
average, CPU governor, disk floors — one FATAL line per violation so the
operator can act from the message alone. vitest-verdict-check.sh refuses a
suite log that cannot be trusted as a verdict — missing or mismatched
summary counts, files that never executed (a truncated run once read as
green from three files of ninety-nine), and worker-pool death signatures.
Both verified live: the preflight correctly refuses this workstation naming
its actual offenders; the verdict guard passes/fails five fixture shapes
(clean, wrong-count, truncated, worker-death, no-summary) and both CLI
modes. Wire-up into the CI lanes rides the runner program.
A production brain's first process boot after a live authority flip looked
hung and was restarted three times mid-recovery — three defects with one
scene. (1) THE FOLD MATERIALIZED THE LOG: peekFactsAbove(0) decoded every
fact into one array (GBs of after-images on a ~7k-fact log, a GC storm, a
starved write lane). The fold now STREAMS one segment-batch at a time —
memory is one segment at any log size — with structural ordering asserted
loudly. (2) THE FOLD WAS SILENT UNTIL DONE: minutes of boot work with zero
narration is what invited the restarts. It now announces itself BEFORE the
work ('do not restart, the fold is finite') and prints progress every
thousand facts. (3) THE CHAIN COULD ONLY ARM AT A CRASH: a live mid-session
flip left the fold checkpoint unfounded, so the brain's first unclean boot
paid a whole-log fold. Adoption now founds the checkpoint AT THE FLIP — one
paged full canonical barrier (bounded memory), then the stamp — so bounded
recovery holds from minute zero for every store that flips, at any size.
Pinned: a non-fresh flip stamps immediately; the first post-flip unclean
boot folds bounded (an unflushed at-ack fact above the checkpoint is
restored; a barrier-covered row below it is outside the fold). Kill matrix
and both adoption suites green alongside.
