feat(groom): default the agent model to claude-opus-5

[mattmillerai]

Bumps the groom model input default claude-opus-4-8 → claude-opus-5, and documents the trade-off in the input description.

The finder, verifier, and builder agents are groom's output quality — surfacing real refactors, adjudicating CONFIRM/DOWNGRADE/REJECT, and authoring the patch — so the default should track the current flagship. Callers that want to hold a run steady can still pin an older id via the model: input; neither current caller (comfy-cloud-mcp-server, cloud) overrides it, so both pick this up on their next SHA bump.

ELI5

Groom uses an AI model to read the repo, decide which cleanups are real, and write the fix. This points it at the newest, strongest model instead of the previous one, because the quality of what it finds and writes depends almost entirely on that choice. Anyone who wants the old model can still ask for it by name.

Cost note: a finder pass is ~$7.50 at the previous model; expect this to shift with Opus 5 pricing. Runtime is unchanged (~12 min, well inside the 40-min timeout).

actionlint clean.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: 1123244a-7709-4b60-a4e4-3907943b5292

📥 Commits

Reviewing files that changed from the base of the PR and between 29a81ca and 70242b4.

📒 Files selected for processing (1)

• .github/workflows/groom.yml

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📝 Walkthrough

Walkthrough

The reusable groom workflow’s model input now documents the finder, verifier, and builder agents, with its default changed from claude-opus-4-8 to claude-opus-5.

Changes

Groom workflow model input

Layer / File(s)	Summary
Update model input contract .github/workflows/groom.yml	The workflow_call.inputs.model description includes the builder agent, and its default model changes to claude-opus-5.

🚥 Pre-merge checks | ✅ 2

✅ Passed checks (2 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch matt/groom-model-opus-5

✨ Simplify code

• Create PR with simplified code
• Commit simplified code in branch matt/groom-model-opus-5

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_{Comment @coderabbitai help to get the list of available commands.}

[github-actions]

🔍 Cursor Review — Consolidated panel

Triggered by @mattmillerai.

✅ No high-signal findings.

Panel: 8/8 reviewers contributed findings.