verify

Run the matrix-targeted verification commands for files that have changed in the current task.

Per ../rules/test-discipline.md: never pytest tests/ -q mid-task (6 min full sweep). Only run the matrix command(s) tied to changed files.

Steps:

1. Determine the change scope:
   • If $ARGUMENTS is provided (file paths), use them.
   • Otherwise run git diff --name-only + git status --porcelain to gather changed files.
2. Map each changed path to its matrix row (from AGENTS.md §Verification Matrix). Surface conflicts: if a file matches no row, ask the user before guessing.
3. Build the deduped list of commands to run.
4. State the plan: "I will run: ". Show it before executing — gives the user a chance to redirect.
5. Run each command. Stream output. Stop at first FAIL with the failing line surfaced.
6. On success: append a short work-log note via cos_work_log_append(task_id=<current>, summary=<one line>).
7. On failure: do NOT mark the task complete. Suggest: keep in testing, fix the failure, re-run.

When a full sweep IS allowed (state it out loud first — per test-discipline.md):

• Pre-merge final gate.
• Cross-cutting refactor touching ≥3 matrix rows.
• User explicitly asked "run all tests".

Output format:

## Verification — {N} command(s)

### Plan
- {file pattern} → `{command}`

### Results
- ✅ `{command}` — {duration}
- ❌ `{command}` — {failure summary}, see {line}

### Next step
{recommendation}