---
name: regress
description: Run the full recordingtest regression suite (or a filtered subset) and triage failures.
allowed-tools: Bash, Read, Glob, Grep, Agent, Write
---

Run the regression suite.

Steps:

1. Verify the runner exists. If `src/Recordingtest.Runner/` is not yet built, stop and tell the user the suite is not set up.
2. Execute the runner with optional filter `$ARGUMENTS` (empty = all scenarios).
3. Collect results from the runner output folder.
4. For each failed scenario, delegate to the `diff-triager` subagent with the baseline/received/artifact paths.
5. Summarize: passed / failed / triage buckets.
6. If any failures are classified as "normalization gap", list suggested rules at the end.
7. Append run summary to `PROGRESS.md` under a "Recent regression runs" section.

Do NOT auto-approve or mutate baselines. Human confirmation is required via `/approve`.