---
description: "Enforces naming, frontmatter, and organization standards for all .cursor/ configuration files"
globs: [".cursor/**"]
---
# .cursor/ Configuration Standards

## Rule Files (.cursor/rules/)
- Kebab-case filenames, `.mdc` extension
- Must have YAML frontmatter with `description` + either `alwaysApply` or `globs`
- Keep under 500 lines; split large rules into multiple focused files

## Skill Files (.cursor/skills/*/SKILL.md)
- Must have `name` and `description` in frontmatter
- Body under 500 lines; use `references/` directory for overflow content
- Templates live under their skill's `templates/` directory

## Command Files (.cursor/commands/)
- Plain markdown, no frontmatter
- Kebab-case filenames

## Agent Files (.cursor/agents/)
- The `.cursor/agents/` directory is intentionally empty. Per `.cursor/rules/no-subagents.mdc`, the main agent does not delegate to subagents in this workspace. Do not add agent files here without a corresponding rule change.

## Security
- All `.cursor/` files must be scanned for hidden Unicode before committing (see cursor-security.mdc)

## Quality Thresholds (canonical reference)

All rules and skills must reference the single source of truth below. Do NOT restate different numeric thresholds in individual rule or skill files.

| Concern | Threshold | Enforcement |
|---------|-----------|-------------|
| Test coverage on business logic | 75% | Aim (warn below); critical-path floor enforced separately (next row) |
| Test coverage on critical paths | 90% floor / 100% aim | **90% is the enforcement floor** in CI gates, refactor verification, and release pre-flight. **100% is the aim** — drift below 100% but at-or-above 90% is acceptable; drift below 90% blocks. Critical paths = code paths where a bug would cause data loss, security breach, financial error, or system outage; identify from `acceptance_criteria.md` (must-have) and `_docs/00_problem/security_approach.md`. |
| Test scenario coverage (vs AC + restrictions) | 75% | Blocking in test-spec Phase 1 and Phase 3 |
| CI coverage gate | 75% overall, 90% critical-path | Fail build below either threshold |
| Lint errors (Critical/High) | 0 | Blocking pre-commit |
| Code-review auto-fix | Low + Medium (Style/Maint/Perf) + High (Style/Scope) | Critical and Security always escalate. Full categorization: see `.cursor/skills/implement/SKILL.md` § "Auto-Fix eligibility matrix" |

When a skill or rule needs to cite a threshold, link to this table instead of hardcoding a different number. The full auto-fix eligibility matrix (severity × category) lives in `implement/SKILL.md`; cite that file rather than re-tabulating the matrix.
