x2
A method for running AI agents to build software, with skills for migrating existing projects, decomposing work into slices, designing prototypes, deriving tests, and extracting lessons. A person decides only at set gates.

A method for running AI agents to build software, with skills for migrating existing projects, decomposing work into slices, designing prototypes, deriving tests, and extracting lessons. A person decides only at set gates.
Use when an existing project that was not built with X2 must be migrated to run under it, with documentation sprawl to dissolve,…
Use after the repo is seeded to run the D-000 five-lens decomposition, record persistent schema decisions, define slice one, and…
Use only after the lock (gate 2b) is on record for the slice portion, to derive the fidelity ledger and acceptance scenarios from…
Use when D-000 exists and the whole-product prototype does not, to run Claude Design in its own context and produce the prototype…
Use when an X2 project completes (or reaches a major milestone) to run the extraction loop, the quality feedback that folds the…
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…
Use when the slice portion is locked and its derived tests exist, to build all of the locked portion to green autonomously.…
Use to change the claims catalog (add, amend, retire a claim, cut a catalog pass), to manage editions (add, retire, recompose),…
Use when the prototype is approved at Claude Design (gate 2a) and a slice's portion must be copied down into the repo and locked.…
Use when the product misbehaves at runtime and the cause is unknown, especially when reproducing needs the human's device, eyes,…
Use immediately after gate 1 (stories approved) to settle which kernel edition the project is built on, create the project repo…
Use when the builder believes the slice is green, to produce the slice-exit report that is the definition of green. Triggers…
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