loop-until-done

The canonical loop skill. Two modes, one entry point:

Mode 1: Drive-to-completion (default)

PRD-driven execution — breaks work into stories with acceptance criteria, iterates story-by-story with independent verification, terminates only when every criterion has fresh passing evidence.

Phases:

1. PRD planner — generates stories with testable acceptance criteria
2. Falsifiability judge — marks each criterion pass/fail for falsifiability
3. Executor — completes each story, runs verification
4. Verifier — per-criterion evidence check
5. Reviewer — final verdict with configurable reviewer (--critic)

From ralph: session persistence, structured story tracking (prd.json), progress tracking across iterations, reviewer verification before completion.

From autopilot: autopilot should invoke this skill for its Phase 3 verify loop rather than implementing its own.

Mode 2: Periodic polling (--poll)

Recurring check on a schedule — fires the same probe on an interval, stops when a condition is met or the user cancels.

From built-in loop: ScheduleWakeup-based recurring execution, CronCreate for fixed intervals, Monitor for event-driven waking.

When --poll <interval> is present, skip PRD generation and run the task as a recurring check.

Execution routing (sagaflow-first)

This skill runs on sagaflow's Temporal backend by default. The workflow is in workflow.py in this directory. Sagaflow provides durable execution, heartbeat monitoring, and crash recovery.

Routing sequence:

1. Run sagaflow doctor to verify worker is running
2. If healthy → launch via sagaflow (fire-and-forget, durable)
3. If worker unavailable → fall back to in-session ralph-style loop (degraded, not crash-safe)

Engineering gaps (TODO)

These features exist in ralph but aren't yet in the temporal workflow:

• Periodic polling mode — workflow.py only handles drive-to-completion; needs a poll-mode branch that uses Temporal timers instead of ScheduleWakeup
• Reviewer selection — workflow.py hardcodes Sonnet reviewer; needs --critic flag routing to architect/critic/codex
• Deslop pass — post-review cleanup pass from ralph not yet in temporal workflow
• Ultrawork integration — parallel fan-out for independent stories not yet wired
• Progress.txt tracking — ralph's cross-iteration learning file not yet in temporal state

Until these gaps are closed, the in-session fallback uses ralph's implementation. The temporal workflow handles the core PRD→verify loop.