MANDATORY skill that activates whenever the OpenSpec proposal phase begins. Triggers: /opsx-new, /opsx-ff, or /opsx-continue runs; openspec-new-change, openspec-ff-change, openspec-continue-change, or openspec-explore is active; `openspec instructions proposal` is invoked; or the user wants to create, update, review, refine, or discuss an OpenSpec proposal.
MANDATORY skill that activates whenever the OpenSpec apply phase begins. Triggers: /opsx-apply runs, the openspec-apply-change vanilla skill is referenced or active, `openspec instructions apply` is invoked, or the user asks to implement, apply, execute, or build out an OpenSpec change ('implement the change', 'apply tasks', 'execute change', 'build out the change'). Takes over only vanilla step 6 (implementation loop) and emulates step 7 output (final status).
MANDATORY skill that activates whenever the OpenSpec design phase begins. Triggers: /opsx-new, /opsx-ff, or /opsx-continue runs; openspec-new-change, openspec-ff-change, openspec-continue-change, or openspec-explore is active; `openspec instructions design` is invoked; or the user wants to create, update, review, refine, or discuss an OpenSpec design document.
MANDATORY skill that activates whenever the OpenSpec specification phase begins. Triggers: /opsx-new, /opsx-ff, or /opsx-continue runs; openspec-new-change, openspec-ff-change, openspec-continue-change, or openspec-explore is active; `openspec instructions spec` or `openspec instructions specs` is invoked; or the user wants to create, update, review, refine, or discuss an OpenSpec specification.
MANDATORY skill that activates whenever the OpenSpec tasks phase begins. Triggers: /opsx-new, /opsx-ff, or /opsx-continue runs; openspec-new-change, openspec-ff-change, openspec-continue-change, or openspec-explore is active; `openspec instructions tasks` is invoked; or the user wants to create, update, review, refine, or discuss an OpenSpec tasks.md file.
MANDATORY skill that activates whenever code is written to implement an OpenSpec change task. Triggers: openspec-plus-apply is active, /opsx-apply is running, the user is implementing tasks from an OpenSpec change, an implementer subagent dispatched by openspec-plus-apply is starting work, or the user invokes phrases like 'TDD for the change', 'implementing change tasks', or 'writing tests for spec scenarios'. Load before any production code is written for an OpenSpec change. Enforces strict RED-GREEN-REFACTOR per test (any test — acceptance, unit, edge case, helper). Iron Law: NO PRODUCTION CODE WITHOUT A FAILING TEST. Gherkin scenarios in spec.md are the canonical source for acceptance tests (every scenario MUST become at least one test); additional unit, edge-case, and helper tests are encouraged and follow the same per-test cycle.