- P2.13: Mark session completion failure classification as done
(WorkerFailureKind::Provider + observe_completion() + recovery bridge)
- P2.14: Add config merge validation gap (active bug being fixed in
clawcode-issue-9507-claw-help-hooks-merge lane)
The config merge bug: deep_merge_objects() can produce non-string
values in hooks arrays, which fail validation in optional_string_array()
at claw --help time with 'field PreToolUse must contain only strings'.
Add WorkerFailureKind::Provider variant and observe_completion() method
to classify degraded session completions as structured failures.
- Detects finish='unknown' + zero tokens as provider failure
- Detects finish='error' as provider failure
- Normal completions transition to Finished state
- 2 new tests verify classification behavior
This closes the gap where sessions complete but produce no output,
and the failure mode wasn't machine-readable for recovery policy.
ROADMAP P2.13 backlog item added.
