* fix(skillopt-sleep): surface Claude CLI spawn failures instead of silent zero scores
In _call and attempt_with_tools, the bare 'except Exception: return ""'
swallows FileNotFoundError (e.g. bare 'claude' on Windows with npm .cmd
shim) and any other spawn failure, returning an empty string that the
trainer treats as a legitimate model response that scores 0.0 everywhere.
Now the exception is caught explicitly: last_call_error is set, a
warning is logged, and the empty-string return is preserved for
backward compatibility of the control flow. This mirrors the pattern
from #92 (codex backend) which fixed the same class of 'dead CLI
masquerades as nothing to learn' bug.
Issue: #121
* test(skillopt-sleep): add tests verifying Claude CLI spawn failures are surfaced
Add two tests to TestClaudeCliBackendBare:
- test_spawn_failure_sets_last_call_error: _call sets last_call_error
and returns '' when subprocess.run raises FileNotFoundError.
- test_attempt_tools_spawn_failure_sets_last_call_error: same for
attempt_with_tools.
These prove the fix from the parent commit (surface spawn failures
instead of silently scoring 0) and guard against regressions.
ClumsyLucid
7df49656d1