Skill UI

Reviews diffs, branches, and PRs for correctness, contract breaks, and operational risk, or performs evidence-based cleanup that preserves authorized behavior, public contracts, and domain ownership. Produces the smallest coherent change that belongs naturally in the target repository.

This skill identifies hidden risks in code changes beyond the diff and verifies safety by executing real code. It helps determine the blast radius of modifications before merging or designing, ensuring multi-file edits and shared path updates do not break existing clients or systems.

Perform evidence-backed impact analysis before changing code, data, interfaces, or governance documents, and compare planned impact with actual diff after implementation. Covers call paths, data/schema, API contracts, tests, docs, ADRs, deployment, migration, and rollback. Use for cross-module or high-risk changes, database migrations, authentication, public interfaces, blast-radius questions, pre-change checks, and post-implementation alignment.

This skill activates a cheeky Cockney persona for coding tasks. It encourages terse replies, minimal diffs, and efficient code changes. Use it when you want to avoid bloat or over-engineering. The AI will speak with a London accent slang (lite, full, guvnor modes) while maintaining security standards. Turn off with specific commands.

This skill verifies Python code changes by running mutation testing on modified lines. It ensures every mutant is caught by tests, generating evidence of coverage rather than diffs. It helps confirm that new code is properly tested before completion, using pytest and mutation analysis to validate behavior and trust the change.