A DomainSpec may declare compatibleVersions: older domain versions whose
stored records the current record schemas still accept. The json backend's
per-record reads admit documents stamped with a declared version (writes
always stamp the current one), and the legacy whole-unit bootstrap migrates
only a file whose stored version is in the accepted set — previously it
migrated any version and stamped the records current, turning a discardable
stale cache into invalid-record failures that refused the whole domain at
open and permanently poisoned the new tree on first boot.
A DomainSpec may also declare invalidRecords: 'backup-and-skip' for domains
whose records are disposable derived data: a stored record failing its zod
schema is moved aside through the new optional KvUnit.backupRecord
(<key>.json.bak.<YYYYMMDDHHmm> under the json backend), logged with its
cause, and skipped, instead of rejecting the open. The default stays
fail-loud, and so do backends without backupRecord.
The per-record contract test forced readFile to fail via chmod 0o000,
which is a no-op on win32, so the readRecord catch stayed uncovered on
the windows native coverage gate. Route record documents without an
isFile pre-filter: a directory where the document should be throws
EISDIR on every platform, and readRecord's existing contract already
reads an unreadable document as absent. Drop the win32 skip.
The per-record rm in the cache spec hits an EPERM flake on windows
native (directory still draining); retry the recursive rm like the
subagent spec does. The unreadable-record probe is meaningless on
windows, where chmod 0o000 is a no-op; skip it there.
The two standalone unit classes deliberately mirror the KvUnit drain/guard
lifecycle (close + assertOpen); mark the block with a reason-carrying
jscpd ignore so the duplication gate stays green.
Opening a per-record unit splits a legacy `<root>/<name>.json` (the
pre-per-record single-file layout) into per-record documents; an
already-present new record wins, and the legacy file is deleted once
every record migrated. The migration also runs when the new tree is
absent — the fresh-upgrade shape — and foreign, shapeless, or malformed
legacy files are left alone. This preserves previously cached session
titles, list metadata, stats, and subagent identity across the medium
change.
Cache README (EN/ZH): the medium is the session_projcache domain in
per-record layout (one version-stamped document per session under the
json backend root), reads are synchronous from the domain's in-memory
tables, and the storage stack rides in base. storage-json README
documents both layouts and their contracts; web-app README notes that
storage and the projection cache live in the shared base. Regenerated:
session-projection subsystem catalog (sync cachedSnapshot, domain
medium), config-catalog (Config.root gone), module-graph (cache now
depends on storage-domain, not session-persistence), cli composition
(storage rows in base), and the projection-cache Agent Note — which now
records the file-root revision and its revert as rejected alternatives.
cache.spec now boots the real storage stack (storage, storage-json,
storage-domain) and asserts the per-record medium directly:
<root>/session_projcache/sessions/<id>.json carries a version-stamped
{version, record} document, cachedSnapshot is synchronous (zero-I/O from
the domain's in-memory tables), and the write-policy / fail-soft / listing
coverage is preserved at 100%. json-backend.spec gains a per-record layout
block (per-record documents, overwrite/delete/reopen, unsafe keys and
undeclared tables rejecting, foreign-document discard on open, closed
guard, close drain, unreadable-as-absent); storage-domain domain.spec
covers layout validation and descriptorOf projection. list-children.spec
mounts the storage stack for its projectionCache cases and its
cachedSnapshot mocks and reads go synchronous; the api-proxy specs' cache
mocks go synchronous too. devDeps and tsconfig references updated for the
storage stack.
The json backend now serves two layouts. single (the default) keeps the
whole unit as one document at <root>/<name>.json; per-record keeps one
version-stamped document per record at <root>/<name>/<table>/<key>.json
(plus global.json), so one write rewrites one record instead of the whole
unit. The per-record unit is stateless — the directory is the state,
loadAll re-reads the tree, and every write is a single durable file
operation — while single keeps its authoritative in-memory state and
whole-file publish. Records keys must be path-safe ([a-zA-Z0-9_-]+);
an unsafe key rejects. A record document that is malformed or stamped
with another version reads as an absent record: one bad or stale file
never bricks the unit, and a version bump discards stale records instead
of migrating them. DomainSpec and KvUnitDescriptor gain the optional
layout field (defineDomain validates it, descriptorOf projects it).
- Write through @deepseek-ai/dsh-atomic-write with { mode: 0o600,
dirMode: 0o700 } instead of exporting a second atomic-write primitive
from dsh-storage-json; the session tree stays owner-only like the jsonl
backend's own directories.
- Serialize atomic replacements per cache path so an older cut can never
overwrite a newer one; track in-flight writes and drain them on
disposal so a late flush cannot land after teardown.
- Detect the absent per-session directory before the checkpoint cut and
durability flush: sqlite-style backends no-op the write entirely.
- Cold-read write-back path and identity both come from the stored log
header (tail.meta), so a stale caller header cannot mint an orphan
cache file.
- Add no-path coverage (write no-op, cachedSnapshot undefined, cold
fallback to the full-log rung) and a concurrent-write ordering test;
the package now holds 100% statement/branch/function/line coverage.
- Sync README.md/zh (inject list, coldSnapshot signature, per-session
file read wording), package description, the Agent Note alternatives,
and the superseded proposed/implemented notes (EN/ZH); add the
concurrent-checkpoint Known Limitation.
Replace the single global session_projcache domain with a per-session
cache file inside the session's own persistence directory, resolved
through sessionPersistence.locate(meta) — the persistence backend owns
the session-directory layout, the cache service keeps every checkpoint
and cold-read responsibility.
- cachedSnapshot(meta) becomes async (one file read per session);
coldSnapshot takes the session header so it can locate the file, with
the stored log header remaining the identity witness.
- Backends without a per-session directory (sqlite) disable the durable
cache: writes no-op and cold reads fall to the full-log rung. An
obsolete global cache is never read — derived data refolds on first
cold read (no migration).
- writeAtomic is exported from dsh-storage-json as the shared atomic
whole-file replace primitive; api-proxy listing and subagent cold
reads await the now-async cachedSnapshot.
- READMEs and a new Agent Note document the per-session medium.
Every release member now declares publishConfig.access: public, so the scope no
longer mixes levels: the 221 packages/*/* and apps/* manifests join the vendored
framework and the native packages.
check-workspace-constraints drops the per-sequence expectation and holds every
release member to public, which is what stops a member from drifting back.
Access is a property of the package, not of a version: the dsh packages already
published as restricted become world-readable at their next publication.
imccyu