Move the identical in-memory child used by the per-call and persistent
host specs into tests/fake-child.ts, and move readProgramResult next to
the ProgramResult type it validates in protocol.ts.
Keep the stream side owned here: line bounds, the leading-brace check,
the write-queue limit and closure. On the birpc side, drop the strict
envelope validation, falsy-rejection normalization and fatal UTF-8
decoding. Calls to methods an endpoint does not own are answered with
birpc's error and unknown messages are ignored; the resolver still runs
only own methods and none after the endpoint closes.
- Reject a control line that does not start with "{", so another
release's length-prefixed frame fails as a protocol error instead of
waiting for a newline until the deadline.
- Bump SSH_PROTOCOL_VERSION to 3: executable helpers embed the PTC
worker, so an older helper is now rejected while connecting.
- Send a small error instead of a late binding result from a finished
persistent evaluation, so it cannot overflow the pipe shared with
the next evaluation.
- Leave per-call binding waits pending after the result instead of
rejecting them; unawaited calls crashed the child and leaked the
trace into the result logs.
- Pin birpc to 4.2.0 so the host and the bundled child agree, and
regenerate THIRD_PARTY_NOTICES.md.
- Update stale frame wording.
One pipe delivers each evaluation's messages before its result, and the
child refuses calls from finished evaluations, so the per-message
evaluation id protected nothing. Remove it with the checks, counters and
helpers it required, measure outgoing messages only when posting, and
replace rethrowing validation blocks with early refusals.
Replace the length-prefixed JsonChannel and hand-written request/reply
correlation with typed birpc methods over newline-delimited JSON. The
host calls the child's run(); bindings call the host's invoke(); logs
and output-limit reports are notifications. The transport bounds
incoming lines and queued writes, validates UTF-8 and exposed methods,
and rejects outstanding calls when the pipe closes.
Drop logic made obsolete by the new transport, including the 32-bit
frame-length bound on maxMessageBytes.
Register calls before awaiting prior process cleanup. Carry policy cancellation into both Node execution modes and retain each admission until its call settles. Track persistent calls during provider disposal as well.
Cover unchanged-mode temporary escalation and policy changes that return to the original mode while cleanup is pending. Document the admission guarantee.
Validation: 308 focused tests passed, one skipped; both changed source files have 100% coverage. Two built-runtime smokes, two selected Session snapshots, all 43 doc-sync gates, and typed lint passed.
Delete @deepseek-ai/dsh-invariants, every package's ./invariant companion
and its tests, the invariant gates and Vitest setup, the scoped-event
resolver generator, and the INVARIANT-coded listener rethrow paths.
Update docs, READMEs, Agent Notes, and add an upgrade guide.
_Kerman