Agent integration

The repository-local SKILL.md is an optional routing layer for coding agents. The Rust engine performs the analysis; the skill supplies context and review guidance around its results.

1. Identify the changed area.
2. Load only its relevant pattern.
3. Run a changed-file check.
4. Use a baseline with --new-only when accepted findings should be hidden.
5. Pass only actionable findings to the agent.
6. Use --explain CHECK_ID when deeper guidance is needed.

nice-code --changed --format agent --project .
nice-code --changed --format agent --new-only --baseline .nice-code-baseline.json --project .
nice-code --changed --format agent --include-review --max-findings 20 --project .

The skill gives review guidance; it does not claim to prove architecture or correctness from text alone. The CLI is still the execution interface. JSON and agent output are the supported machine-facing formats; there is no MCP server or editor plugin yet.