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Use when the slice portion is locked and its derived tests exist, to build all of the locked portion to green autonomously. Triggers at implement start and on every re-entry after a human turn. Do not use to declare green (slice-exit does that), and do not use it for an unexplained runtime defect (problem-solve).
Codex または Claude でインストール この Prompt をコピーして Codex、Claude、または他のアシスタントに貼り付けると、Skill ページを確認してインストールできます。
SOC 職業分類に基づく
Use when an existing project that was not built with X2 must be migrated to run under it, with documentation sprawl to dissolve, stories to harvest at epic altitude, an as-built design to baseline, and existing enforcement to map and arm. Runs the migration on a dedicated branch with three human gates. Do not use for a new project (that is seed), and do not use it to redesign the product or refactor code beyond what arming the enforcement requires.
Use after the repo is seeded to run the D-000 five-lens decomposition, record persistent schema decisions, define slice one, and start the deltas file. Also use when a stays-ahead decision (decomposition, schema) must be revisited. Do not use for per-slice implementation decisions; those are D-0xx record-gaps raised during implement.
Use when someone asks what an X2 skill does, which skill to run next, how the gates work, or where an artifact lives. A quick in-flight reference; for the method's rationale, read X2.md at the method repo root.
Use immediately after gate 1 (stories approved) to settle which kernel edition the project is built on, create the project repo from it, and make the method durable inside it. Also use when an existing X2 project is missing its CLAUDE.md standing constraints or its turn ledger. Do not use before stories are approved, and never use it to modify the kernel itself.
Use to change the claims catalog (add, amend, retire a claim, cut a catalog pass), to manage editions (add, retire, recompose), to measure an edition's conformance honestly (plant, prove, audit, lower a row), to clear accumulated decisions with the owner, or to check that the whole kernel is still coherent. Also use when a claim or edition change may have left counts, scope or statements in the documentation stale. Do not use it to seed a project from an edition; that is seed's job.
Use when an X2 project completes (or reaches a major milestone) to run the extraction loop, the quality feedback that folds the project's evidence back into the method. Reads the turn ledger and decision records, computes the metric and the per-decision churn table, distils sanitized candidates, confirmations, and negative-space nominations, and holds everything for a rulings pass. Do not use mid-slice (that is the normal intake flow), and never let raw project material cross into the public method.
| name | implement |
| description | Use when the slice portion is locked and its derived tests exist, to build all of the locked portion to green autonomously. Triggers at implement start and on every re-entry after a human turn. Do not use to declare green (slice-exit does that), and do not use it for an unexplained runtime defect (problem-solve). |
Build the slice: generate, verify, correct, re-verify, running to green without human turns wherever you honestly can. The kernel enforces the invariants; this skill exists to capture the decisions the kernel cannot make and to keep the drive honest.
All of the locked portion. Fidelity to the whole approved contract, no silently dropped pieces (this is what gate 3 ratifies, through the exit report). The pilot's dark-only theme flip is the canonical violation: a visible piece of the locked contract quietly dropped while everything read as done. "All of it" means all of the locked portion; the rest of the prototype is the design spine awaiting its slices.
When unsure whether something is a turn, surface it and let intake classify it. Never absorb it silently, and never manufacture a turn for a commodity choice.
These were settled by the record and, since the invariants pass (2026-07-11), are enforced by the kernel; the notes here say what the gate will do so you work with it, not around it.
Harness:Enabled, which
refuses to boot outside Development/Testing; never a weakening of a production path.Append every human turn to the repo's turn ledger the moment it happens: number, what happened, why a human was needed, provisional bucket. Feed every turn to intake as it happens, not only defects; intake's classification governs. A count held in your context is not a count (MET-05).
Green is never declared in prose. When every tier passes and the contract is met, invoke slice-exit and produce the report. If the report cannot be completed honestly, the slice is not green.