The new no-unknown-casts check rejects two assertions introduced by these projection regressions. Both fixtures intentionally represent unknown content: malformed input sent to the admission checks, and a cached plugin block whose opaque field was already lost.
Declare those inputs as unknown variables instead of asserting their expressions to unknown. Keep the same malformed values, content assertions, checkpoint replay, and production validation. Do not expand the recorded cast allowances or change any runtime behavior.
The cold checkpoint regression calls only the projection registry register and restore methods. Neither needs SessionStore, so mounting and disposing that extra service obscured the fixture dependency. Keep the registry lifecycle and the recovered-content assertion unchanged.
A valid unknown content block can own a __proto__ JSON field. Zod object reconstruction silently drops that key when Team events are projected and when checkpoints are admitted, even though the original Session log still contains it.
Validate the unknown block tag without reconstructing its decoded JSON fields. Keep the current V4 local validators and the rejection of retired tool-result content. Bump only the Team projection cache stateVersion from 3 to 4 so old lossy checkpoints are rebuilt from the unchanged log; this is not a Session format or schema change.
Cover direct and nested opaque JSON fields inside accepted native V4 content, plus public registry restoration from an older lossy checkpoint. Historical tool-result conversion remains owned by the Session migration and is not restored in the Team parser. Update the README and existing Team decision rationale together.
Adapted from the Team JSON preservation work in b8f1da92599123e5d5bae6c174f73b5b778f3554 by Tianyi Cui.
Co-authored-by: Tianyi Cui <[email protected]>
Central V4 event admission already rejects tool-result content in Team
queue records, but projection checkpoints use the Team state schema directly.
After restoring the baseline Team parser during extraction, the production
SessionProjectionRegistry.restore() path accepted a decoded native V4
checkpoint containing the retired wrapper without reading an event.
Remove only that V4-incompatible schema arm. Keep the existing unknown-JSON
parser unchanged; its independent own-key preservation fix remains in the
standalone master PR, where recursive V3 tool results are still valid.
Exercise the real checkpoint restoration recipe with a valid text state and
an invalid retired-result state, plus queued-event projection. The new
checkpoint rejection failed before this change; central event admission and
the complete Team owner suite pass afterward with 100% projection coverage.
No Session schema, format version or projection state version is changed:
the rejected value is already outside the native V4 content vocabulary.
Retaining own keys in the Team projection/checkpoint parser fixes a generic
JSON reconstruction defect. It is independent of V3-to-V4 identifier
conversion and can be reviewed directly against master, where recursive V3
tool-result content is still valid.
Restore the Team implementation, tests and paired README to this layer's
parent after the standalone owner captured the exact delta from 85737364be9.
The standalone port retains V3 validators and applies only the non-cloning
unknown-JSON repair. Migration content handling for team/message/queued and
all approved namespace, delivery and source-admission rules remain intact.
This removes an independent runtime/parser policy from the format stack;
it does not change any Session schema, codec, version or stored source file.
V3 permits external event, source and content identities and additional
request-tool fields. Copying those values into V4 can give an old plugin
named tool a core source identity, turn old tool-addition content into a
registry instruction, or activate formerly ignored deferLoading and delivery
metadata. Rejecting such collisions would instead refuse valid source logs.
Keep historical extensions in the existing extensible JSON representation.
Prefix unknown content and ignorable event tags with plugin:, preserving
all other content fields and opaque event payloads. Prefix external source
identities with plugin:plugin: or plugin:source: so wrapper and direct kinds
cannot collide even when original names already contain a category prefix.
Known first-party mappings remain explicit and unchanged.
Prefix extra request-tool field names and block-start field names with
plugin:, retaining exact values and existing-prefix doubling. Core schema
parameters, arguments, replay state and nested plugin data are not traversed.
Keep future-generation delivery records inactive after header promotion.
Pin the V3 event vocabulary independently of the current writer and provide
an offline verifier against an explicitly selected historical source commit.
Attachment authorization and export inspect declared event content only.
Team checkpoints preserve all own keys of unknown JSON blocks while still
rejecting malformed known content and retired core tool-result blocks.
Exercise physical read/write/reopen, prefix injectivity, own __proto__ keys,
provider opacity and retained source-identity snapshots.
No generic extension block, metadata wrapper or new schema-tooling type is
introduced. V4 type declarations, persistence schema, checkpoint and frozen
V0-V3 codecs remain unchanged. Canonical tool-result lifting and incomplete
child-catalog policy remain separate concerns.
Adapted from the extension-preservation work in 7ba7e174dd1 by Tianyi Cui.
Co-authored-by: Tianyi Cui <[email protected]>
The persistence seam is now create/open/stat/list returning per-session
SessionHandles (read/append/flush/close); every log read and write flows
through the owning handle. The seam package exports only the service and
handle contracts, consumer-visible errors, and pure durable-data
validation helpers; each backend owns its complete storage runtime, and
the shared contract suites pin equivalent observable behavior. The
backend routes published sessions' live events by id into the active
write handle; agent-loop only acquires, seeds, and closes the handle.
Resume appends interruptedTurnClosers through its write handle;
session-query owns the revision-keyed cold cache. Legacy-only surfaces
are removed in the same swap: locate/readRaw/supportsRawArtifacts, the
legacy event-shape read migration, zstd torn-frame salvage,
DSH_SESSION_JSONL, and hook transcript_path population; a torn final
zstd frame is discarded whole; the session-list cold blank probe returns
on stat metadata (eventCount derived from the last physical row,
sizeBytes). The WebUI ZIP export serializes the logical log from a read
handle, so both backends export identically.
Refs #3245
Tianyi Cui