Mmcp.market

diff-review skill

by nexu-io·nexu-io/open-design·98k stars·Apache-2.0

Render the patch-edit run's accumulated changes as a reviewable diff, surface it through a GenUI choice surface, and persist the user's accept / reject decision into the artifact manifest.

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Is the diff-review skill safe?

Clean: nothing in its files matched our rules. We read 2 files in the folder on 2026-09-28.

No findings.

Install the diff-review skill

A skill is a folder. Copy it into your agent's skills folder and the agent loads it when the task matches its description. 

git clone --depth 1 https://github.com/nexu-io/open-design.git /tmp/open-design
mkdir -p ~/.claude/skills
cp -r /tmp/open-design/plugins/_official/atoms/diff-review ~/.claude/skills/diff-review
available in every project

In the Claude apps, zip the folder and upload it from the Skills settings. The folder on GitHub

The instructions your agent would load

SKILL.md as published, without the frontmatter. Read it on GitHub

Diff review

Spec §20.3 / §21.3.2: a code-migration / tune-collab handoff is worthless without a human-reviewable diff. This atom is the "present the patch, capture the decision" stage.

Inputs

since the previous diff-review iteration).

  • The project cwd's accumulated edits since the run started (or
  • plan/steps.json for context per file.

Output

project-cwd/
└── review/
    ├── diff.patch        # unified diff (git apply-shaped)
    ├── summary.md        # human-friendly per-file walkthrough
    ├── decision.json     # { decision: 'accept' | 'reject' | 'partial', accepted_files: [...], rejected_files: [...], reviewer: 'user' | 'agent' }
    └── meta.json         # { generatedAt, atomDigest, planRevision }

The atom raises a choice GenUI surface with the three top-level decisions (accept / reject / partial). On partial the user flips per-file decisions through follow-up surfaces.

Convergence

The atom completes when decision.json has a non-empty decision. Acceptance writes handoffKind: 'patch' (or 'deployable-app' when a successful build-test is on file) into the eventual artifact manifest; rejection rolls back the patch via git restore or the equivalent in the code-import-bound repo path.

Anti-patterns the prompt fragment forbids

rejected_files on partial decisions.

  • Skipping the surface and assuming acceptance.
  • Generating a decision.json that lacks accepted_files /

files[] — the patch boundary is a contract.

  • Rolling back files outside plan/steps.json's union of

Status

Implemented by the daemon runner in apps/daemon/src/plugins/atoms/diff-review.ts, with GenUI decisions persisted by apps/daemon/src/plugins/atoms/diff-review-genui-bridge.ts.

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