[JacobStephens2]

Summary

Session log recording now owns transcript consumption, Model evidence handoff, exact Command ownership, child inheritance and collection.

record Session
  capture owning Command + start stamp
  consume transcript → checkpoint stream Models (including reader failure)
  present completion report → replace checkpoint (empty is authoritative)
  absent completion report → keep checkpoint
child Run → inherit exact owning Command
Run notification → collect owner/stamp evidence → render Session models section

Delete the displaced metadata module and Session runner. Preserve record format, Harness interpretation, notification wording and launch/Resume/review-report policy. Clarify the existing Session log and Run notification domain descriptions.

Closes #630

Evidence

• Before: Restoring the previous absent-report overwrite made cargo test --bin thirdshift session::recording::tests::absent_completion_report_preserves_the_stream_checkpoint -- --exact fail: the saved Models became [] while the checkpoint contained ["reported-model"].
  After: The same test passes with the conditional replacement; the checkpoint survives interruption during retained acquisition.
• 11 recording tests pass, including authoritative empty retained Models, immutable ownership across both writes, nested inheritance, interruption, reader/execution failure, corruption, owner/stamp selection, deduplication and fallback wording.
• Focused regressions pass: 30 Run notification, 9 Session execution, 10 Muse, 16 OpenCode and 12 Interpretation tests. The new Muse/OpenCode stand-ins deliver retained Model evidence to notification text.
• cargo check, cargo fmt --check and cargo clippy --all-targets -- -D warnings pass.
• Full SYSTEMD_UNIT_PATH=/usr/lib/systemd/system:/lib/systemd/system cargo test: 1706 passed, 1 ignored across 41 test binaries; zero failures.
• The initial plain cargo test reached an unrelated deployment check that rejects stderr from a malformed host systemd unit. The same systemd-analyze verify --man=no against service files extracted from main reproduces that host warning. The focused deployment check passes with the library-only unit search path above, which still verifies the repository units and their system dependencies. No host configuration or repository deployment code was changed.

Testing seams

• Recording::run: real Interpretation and local commands, with temporary Session logs and captured owning Command fixtures; assert outcomes and collected evidence.
• Recording::inherit_command: inspect child command environments and pass ownership through nested local processes.
• Recording::notification_lines: temporary record directories exercise exact ownership, stamp selection, corruption, order, deduplication and display fallbacks.
• Run notification and Session execution: existing process-level stand-ins, plus retained Muse/OpenCode evidence delivered to the notification.

Review

Reviewed with thirdshift-code-review using git diff main...HEAD, fixed point 04c807760edd5e0b743f7335c433d2f8123393af.

• Standards: 0 findings; all changed files read, including the deleted metadata module.
• Spec: 0 findings; all changed files read, including the deleted metadata module.
• Changed files left unread: none.

Unaddressed findings

Standards

None.

Spec

None.

Merge Danger

Door: two-way

The refactor can be reverted; persisted metadata remains compatible.

Blast Radius: attribution

Session Model evidence and Run notification collection across child Runs. Process supervision and Harness interpretation retain their existing behavior.

Built with codex · gpt-6.1-sol · high