initree docs

The locked contract, plus how to build on it. New here? Read top to bottom — each builds on the last.

• Lifecycle & layer contract — the manifest schema and the five-phase lifecycle, worked through one slice.
• Generalization proof — the same engine across two unrelated stacks, and why the dependency graph stays acyclic.
• Capability registry — the locked vocabulary: capability keys, recipe tokens, secret purposes, injection points.
• Authoring layers — write your own layer, start to finish.
• Roadmap — what's shipped and what's next.

The first three are the source of truth, locked at v1. Section numbers in those docs (§N) are stable — the engine's source cites them as docs/<name> §N to trace a check back to the rule it enforces.