| name | triangulate |
| description | Triangulate plans and code from three expert viewpoints — functionality, security, and testing — across three phases (plan, implementation, review). Each iteration sharpens the position of remaining issues until all are resolved. Always use this skill when: asked to review plans, code, or branches; asked to evaluate from functionality/security/testing perspectives; asked for PR or pre-implementation review; asked to implement or develop from a plan. |
Triangulate Skill
A skill that covers the entire development workflow from plan creation to coding to code review.
Three expert agents (functionality, security, testing) triangulate issues at each phase, repeating review and fix cycles until all findings are resolved.
The skill is split across several files for context efficiency. Load only the files required for the current phase.
Supplemental Files
| File | Load when |
|---|
phases/phase-1-plan.md | Plan creation / plan review is the active phase |
phases/phase-2-coding.md | Implementation is the active phase |
phases/phase-3-review.md | Code review is the active phase |
common-rules.md | Any phase — contains severity classification, sub-agent launch patterns, codebase awareness obligations, anti-deferral rules, and the recurring issue check reference (R1-R36, RS*, RT*) |
Loading protocol — when a phase file references a rule identifier (R1-R36, RSN, RTN), a "Common Rules" section, or an obligation defined elsewhere, Read common-rules.md before acting on that reference. Do not paraphrase from memory.
Entry Point Decision
Determine the starting phase from the user's instructions:
| User instruction | Starting phase | First action |
|---|
| "Implement", "Develop", etc. — starting from scratch | Phase 1 (Plan creation) | Read phases/phase-1-plan.md |
| An existing plan file path is specified | Phase 1 (From review) | Read phases/phase-1-plan.md |
| "Review the code", "Review the branch" | Phase 3 (Code review) | Read phases/phase-3-review.md |
Phase Transitions
- Phase 1 → Phase 2: after plan review completes, Read
phases/phase-2-coding.md
- Phase 2 → Phase 3: after coding completes, Read
phases/phase-3-review.md
- Phase 3 standalone: when invoked for branch review only, skip Phase 1 and 2
Each phase file ends with a summary and a pointer to the next phase. Follow the pointer when the current phase reports complete.
