claude-sdk-rs: Skill for Claude Code

============================================================================= sdlc-task — the LEAN small-work engine (implement → test → fix → commit)

The cheap rung of the pipeline ladder, for one small unit of behaviour-changing work (a /ticket or /chore). Runs a spec's task(s) through a tight per-task loop — implement → fast gating-test → triage → fix (≤3 attempts, Opus on the last) → commit → [terminal authoritative reconcile] → lean bookkeep close-out and nothing else. No scout, no separate review, no document stage, no ui-test, no PR. The bookkeep close-out is deliberately lean: on a passing full run it flips the authored status markers (tasks.md task status, the status.md Progress row, the state.json block status) and — in place, on main — runs mev emit-state --write; it does NOT write a log.md narrative, a D18 amendment log, or run review/docs/PR. Run /log-work for the narrative. When you need a consolidated review + docs + a PR, use /sdlc-flow; for a whole spec in place, /sdlc-run; for a roadmap, /sdlc-block.

TERMINAL AUTHORITATIVE RECONCILE (D56) — this engine's per-task tripwire runs fastCommand in place of command (testDepth=fast, the default) and never runs a perTask: false check at all, so those checks' real, authoritative form was never verified anywhere in the run. After the last task passes on a full, non-bailed, testDepth=fast run, ONE reconcile pass re-runs — with their real command, never fastCommand — only the gates:true checks the per-task tripwire actually skipped: those whose fastCommand differs from command, plus every perTask:false gating check. Checks with no fastCommand already ran authoritative on every per-task pass and are NOT re-run (redundant cost; see D56). Default-on, no flag, no harness.json opt-out — see D56 for why. A failing reconcile bails into a distinct terminal state, reconcile_failed: bookkeep does NOT run, the block is NOT flipped to done, and all per-task commits stand. Resume (--resume, no task selection) re-enters with every task already "passed" in state.json, so it naturally re-runs only the reconcile — no separate resume path needed. Skipped entirely when testDepth=full (every check, including perTask:false ones, already ran authoritative on every per-task pass — see renderCheckList) or on a partial task-subset run (the existing fullRun guard).

ISOLATION Default: IN PLACE on the current branch (no worktree) — cheapest, like /sdlc-run. --worktree: SUSPENDED FLEET-WIDE (D81, 2026-08-23). The engine refuses the flag unconditionally and exits before any setup — no override, no environment escape hatch. Run on a plain branch instead. The worktree machinery survives intact for when D81 lifts.

USAGE /sdlc-task run every task in the spec, in place /sdlc-task 2 run only task 2 /sdlc-task 1-3 run a task range (1-3, 1,3,5, 5) /sdlc-task --resume resume from the committed state file /sdlc-task --test-depth full full gating suite per task (default: fast) (--worktree is refused per D81 -- do not pass it)

PIPELINE setup (locate repo / create worktree) → enumerate (D16 lint) → [resume load] → per-task loop → [terminal authoritative reconcile, D56] → lean bookkeep close-out (on pass) → final state commit

Per-task loop (sequential): implement → fast-test → (triage → fix/bail) ×≤3 → one state write per task A triage MAJOR / immediate-bail reason breaks straight out (does NOT burn the remaining attempts); the run stops and reports for human pickup.

Terminal reconcile (D56, after every task passes on a full, testDepth=fast run): re-run, with their authoritative command, only the checks the fast tripwire substituted (fastCommand) or skipped (perTask:false) → on failure, status "reconcile_failed" — bookkeep is skipped, the block is NOT flipped to done.