Practice Registry

Use the Practice Registry MCP server for Scala, Python, TypeScript, JavaScript, and Rust code work.

1. Before non-trivial code generation or edits, call preflight when intent or files are known.
2. Call check_plan with the intent, files, language, framework, dependencies, and planned approach before writing code.
3. After edits, call scan_diff with the final diff for concrete changed-line findings.
4. Use check_diff for advisory practice guidance when the code shape is broader than a concrete Semgrep finding.
5. Before the final response, call finalize_change with the final diff and pass the matching check_plan observation id when available.
6. Trust the passed field. Treat only allowed and follow_guidance as pass decisions.
7. Use explain_practice before overriding a discouraged, legacy_accepted, or needs_review result.
8. Treat banned findings as blockers. Change the code before finishing.
9. Treat legacy_accepted as allowed only for the recorded context. Do not add new handwritten uses of legacy patterns.
10. Use propose_practice for repeated uncovered decisions and record_exception for scoped exception requests.
11. Resolve needs_review through the named owner or record_approval. Research approval requires an indexed practice plus at least two directly supporting HTTPS sources from independent publishers and domains.
12. Do not use research approval to approve an exception. Exceptions still require the recorded owner decision.

If hooks or CI report a practice finding, fix the code and rerun the same check before summarizing the work.