Build

Overview

All subagent dispatches use disk-mediated dispatch. See shared/dispatch-convention.md for the full protocol.

All subagent returns use the Ledger Return Protocol. Every subagent returns exactly one Evidence Receipt per shared/return-convention.md; the orchestrator applies the two-tier receipt linter (Tier 1 structural + Tier 2 witness verification — full grammar in the shared convention) to every Task return before acting on the declared VERDICT. The linter is a deterministic runtime tool: orchestrators MUST run python3 scripts/rcpt_verify.py --tier2 --strict --root <dispatch-root> --ledger <dispatch-root>/receipt-ledger.jsonl <receipt> on every received receipt before acting on its VERDICT, and apply the shared convention's in-context pseudocode ONLY as the fallback when the tool is unavailable (--root is repeatable, but build passes exactly one — the dispatch root; a sha256 mismatch on any resolved artifact hard-FAILs with or without --strict, --strict additionally hard-FAILs a path-shaped name that neither the dispatch root nor its git toplevel holds, and under a single root the cross-root ambiguity hard-FAIL cannot arise at all — an unresolvable bare basename is UNVERIFIABLE, never a false FAIL). A lint failure is treated as structurally BLOCKED.

The orchestrator maintains a per-run Invariant Cairn at ~/.claude/projects/<project-hash>/memory/cairn/cairn-<run-id>.md per shared/cairn-convention.md. See the ## Cairn (Layer 3) section below for build-specific phase definitions, terminal condition, and mandatory-invariant categories.

End-to-end development pipeline: interactive design, autonomous planning with adversarial review, team-based execution with per-task code and test review. One command, idea to completion.

Announce at start: "I'm using the build skill to run the full development pipeline."

Session index event: At startup, if session indexing is active (session index path discoverable via glob), emit a skill_start event to the outbox: {"ts":"<now>","seq":0,"type":"skill_start","summary":"Starting /build for <user goal>","detail":{"skill":"build","goal":"<user goal>"}}. See skills/shared/session-index-convention.md for the outbox pattern.