Write handles now hold a durable lease (session.lock.json beside the
log): a random owner token, diagnostic pid, and an expiry. Acquisition
wins by exclusive create; a second process's create or write open rejects
while the record is unrenewed for less than leaseTtlMs (default 5 min),
and takes over after that — a crashed holder is waited out, never
reclaimed by pid. The holder renews every leaseRenewIntervalMs (default
4 min); a renewal that finds a foreign, vanished, or expired record — or
fails outright — marks the lease lost permanently, so every later
append/flush rejects with SessionOwnershipLostError while reads continue.
Close releases the record; read handles never touch it. Takeover of an
expired record is eventually exclusive: a replaced holder stops within
one renewal interval.
Refs #3245
The dsh-family version rule lived only in the packages/ block of
checkWorkspaceManifest, so apps/ members and the root-named CLI carried the
shared version with no static check of their own. The name-based rule now
covers every scanned manifest; regression coverage names the stale-version
merge that shipped packages/util/http-proxy at 0.1.2-alpha.5 behind a
0.1.2-rc.1 family.
`SESSION_FORMAT_VERSION` is the only value that names the Session format
generation. Two other version fields had moved to 2 alongside it:
- The `dsh_session_log` request extension's outer schema `version` returns
to 1 and its Session header projection keeps `seedLength`, derived from
the logical inherited cut, so the external wire is unchanged in this PR;
`sessionFormatVersion` alone identifies the embedded generation.
- The `sessionStats` projection unit's `stateVersion` returns to 1: the
projection cache binds every checkpoint to the format generation, so a
generation change discards old rows without a unit version bump.
Test doubles and the standalone Client fixture that build a current
header now spell `SESSION_FORMAT_VERSION` instead of the literal.
The README file table listed four of the six source modules and omitted
the two largest, so the package read as an oversized identity conversion.
The summary now states that most of the source is the frozen released
v0/v1 event vocabulary, why the edge refuses a malformed historical log
before the installed current restorer runs, and that later edges reuse
those shapes; the table gains `payload-validation.ts` and
`relationships.ts` rows.
The `start` frame and the reconnect baseline attempt carried a wall-clock
`startedTime` that no Host or Client consumer read: the Host accumulator
and the Client reconciler copied it into their attempt maps and nothing
looked at it again. Presentation frames now carry only the coordinates
consumers use (attempt, revision, turn, step, chunk index, and v1 seq
provenance); the type-equivalence block, event graph, READMEs, and the
live-stream Agent Note follow the type.
`session[.vN].jsonl` was assembled independently by the JSONL provider
(twice), the session-log export archive, and the recorded-session fixture
helpers. `dsh-session-format` now owns `sessionFormatLogFilename` and
`parseSessionFormatLogFilename`; the three consumers append only their
compression suffix, and the migration note names the owner.
`snapshotSessionFormatJson` re-implemented the lossless JSON walk that
`dsh-util-values` already publishes as `snapshotJsonValue` + `deepFreeze`,
and the frozen v0 relationship validator carried a third structural JSON
comparison next to `deepEqualJson`. Both now delegate; the format package
reports one `is not lossless JSON` diagnostic per labelled subject instead
of ten member-specific ones, and enumerable accessors whose values survive
a JSON round trip are accepted like `JSON.stringify` accepts them.
`assertFixtureInventory` folds every retained generation of one parent or
child fixture into a single role before comparing, so an older generation kept
beside the current one is not an inventory drift. The generation spec writes
headers that match each filename, since fixture selection validates the chosen
generation, and asserts that an absent parent resolves only for an
override-only replay. The `dsh_session_log` composition expectation follows the
extension's version 2 payload.
The continuable-child headless expectation and the Python `advanced` and
`restart` scenarios pin the current runtime, whose subagent children carry no
`session/end-seed` marker and whose assistant messages embed their streams:
the child fixture drops the marker and renumbers its references, `advanced/`
re-records `result.json`, and both scenarios gain their v2 Session fixtures.
Unit tests cover the `tool-call-delta` id and name validation, embedded
stream members without timing arrays, and the versionless-header refusal.
The JSONL backend rethrows storage errno failures and abort signals from the
source read of a pending migration unwrapped; a test now drives both through
the stat seam so the classification stays covered. The navigation-panes Web
e2e derives the exported archive entry from `SESSION_FORMAT_VERSION`, which
`session-log-export` uses for its `session.v<N>.jsonl` name. The module graph
records the `session-log-export` → `session` peer edge.
`session-format-v1-to-v2` takes the `0.1.2-rc.1` root version that master
requires, and `defineReleasedPayloadDisposition` drops the `@param` tag for a
parameter it no longer has.
mektpoy