feat(m3): crucible compliance-check CLI + run_compliance_harness (M3 PR 16c)

[suzuke]

Summary

Closes the M3 PR 16 stack (16a codex + 16b gemini + 16c harness/CLI). Ships:

• run_compliance_harness(adapter, *, tasks, project_dir, ...) — the operator-facing function that produces compliance reports the backend's gate enforcement consumes.
• crucible compliance-check Click command — wraps the harness for the CLI UX.
• 22 new tests covering the classification matrix, harness behaviour, persistence, and CLI plumbing.

Stacked on PR 16b (#16)

This PR is stacked on feat/m3-gemini-cli-adapter. Once 16a merges → 16b rebases → 16c rebases. Or merge them in order.

Classification matrix

_classify_trial priority (earliest wins):

1. raw.timed_out → CLI_ERROR
2. CLISubscriptionAuthError caught → CLI_ERROR (gate run invalid, surface as failing)
3. raw.exit_code != 0 → CLI_ERROR
4. parser raised generic exception → CLI_ERROR
5. parsed.unknown_schema → PARSE_FAILURE
6. parsed.tool_was_called → PARSE_SUCCESS
7. _MODEL_REFUSAL_PHRASES match in description → MODEL_REFUSAL
8. residual (clean run, no tool, no refusal phrase) → FORMAT_DRIFT

_MODEL_REFUSAL_PHRASES is an explicitly declared tuple (mirrors the auth-phrase pattern from PR 16a/16b — no coincidental substring matching).

Module-level imports (sys.modules-eviction tolerance)

CLISubscriptionAuthError + AdapterRunContext are imported at MODULE level in compliance.py, NOT lazily inside run_compliance_harness. The lazy variant fails when test_agents_factory evicts crucible.agents.* between collection and runtime — the harness's late-resolved class would not match isinstance checks against caller-held pre-eviction instances. Module-level keeps the binding stable.

CLI UX

$ crucible compliance-check --adapter codex-cli --project-dir . --limit 3
Running compliance gate: codex-cli v0.124.0 (3 tasks)

Compliance report:
  adapter      : codex-cli
  cli_version  : 0.124.0
  cli_binary   : /usr/local/bin/codex
  total trials : 3
  passes       : 3 (100.0%)
    parse_success  3

✓ Release threshold met (≥99%)
Report persisted to /home/user/proj/compliance-reports

Stats

git diff --stat HEAD~1 HEAD | tail -1 → 817 insertions / 0 deletions, 3 files.

File	+/-
src/crucible/agents/cli_subscription/compliance.py	+187
src/crucible/cli.py	+153
tests/test_compliance_check_cli.py (new)	+477

Test results

2809 passed, 4 skipped (pytest --ignore=tests/test_agents.py). The pre-existing PR-16 regex case mismatch in test_create_agent_unknown_raises remains the only excluded failure across the entire M3 PR 16 stack — recommend opening a 1-line follow-up PR to fix that regex independently.

Test plan

• _classify_trial matrix: timeout, auth, exit_code, unknown_schema, tool_was_called, refusal phrase, format_drift residual, parser-raise, priority (auth beats schema_drift)
• Harness happy path: 3 mocked PARSE_SUCCESS trials → pass_rate=1.0, report persisted, fields populated
• Workspace materialisation: task.workspace_files written to scratch before adapter sees ctx
• Harness exception handling: subprocess-raise → CLI_ERROR, parser-raise → CLI_ERROR, auth-error → CLI_ERROR with "auth:" prefix
• Mixed results: heterogeneous trial outcomes accumulate correctly
• Persistence round-trip: load_reports() reads back what run_compliance_harness wrote
• CLI smoke: codex-cli adapter construction + run + summary + persistence
• CLI input validation: --adapter required, unknown adapter rejected, --limit 0 rejected
• Threshold messaging: release/admit/below-admit lines render correctly

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