Extends the preserve-on-capability-block design to also preserve
state on agent crash, and snapshots the transcript on every
teardown so any resume (crash or capability-block) gets a warm
claude session — not a cold start.
- capability_apply: rename _snapshot_transcript → snapshot_transcript
(public; reused below). No behavior change in the capability path.
- cli/start.py: capture bottle.exec_claude's exit code; while the
container is still alive (inside the launch context):
* always snapshot_transcript(identity)
* if exit_code != 0, mark_preserved(identity)
Then the existing _settle_state runs after teardown.
Now the preservation matrix is:
exit 0 (clean) → snapshot + cleanup state
exit ≠0 (crash, Ctrl-C) → snapshot + preserve + show resume hint
capability-block → (already snapshotted/preserved by apply
before teardown; this path is a no-op
because the container is already gone
by the time exec_claude returns)
snapshot_transcript is best-effort — capability-block's earlier
snapshot is not clobbered when the container is already torn down,
and a missing /home/node/.claude is a warn + skip.
Tested behavior: clean exit doesn't preserve, non-zero exit
(including SIGINT/130 and SIGKILL/137) preserves; empty identity
no-ops both helpers.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
