looper

name	looper
description	Scaffold a well-designed agent loop with best-practice coaching and a cross-model review council. Use when the user wants to design, build, or set up an agent loop, iterative agent workflow, self-review loop, LLM-as-judge loop, multi-model council, reviewer/judge gate, or /goal-style looping process. Guide goal refinement, typed verification criteria, reviewer and judge selection, privacy boundaries, termination guards, no-progress stops, and lightweight observability, then emit a RUN_IN_SESSION.md handoff prompt plus portable loop.yaml, loop.resolved.json, LOOP.md, and run-loop.py.
disable-model-invocation	true
argument-hint	[target-dir]
allowed-tools	Write Bash

Looper

Use Looper as a loop design coach and scaffolder. During design, interview, critique, validate, and write files. After emission, offer to run the loop in the current session using RUN_IN_SESSION.md; keep run-loop.py as the advanced external runner.

Workflow

1. Resolve the target path from the /looper argument. If no target is given, use ./looper-output. If the target contains an existing loop.yaml, treat the task as an edit/resume instead of a fresh scaffold.
2. Load the relevant rubric only when entering that stage:
   • Goal stage: references/goal-rubric.md.
   • Verification stage: references/verification-rubric.md.
   • Council stage: references/council-rubric.md.
   • Control stage: references/control-rubric.md.
   • Model detection or privacy details: references/model-detection.md.
3. Interview in seven stages: goal, verification, host model, council, gates/control, confirmation flow preview, emit/run option. In the control stage, cover execution boundary, isolation, no-progress signals, state, and run logging.
4. Critique each stage before accepting it. Prefer concrete alternatives over vague warnings. Push weak goals toward outcome, scope, context, and done state. Push weak verification toward programmatic checks first, then judge rubrics, then human signoff.
5. Keep reviewer and judge roles distinct. A reviewer writes notes. A judge returns a structured verdict. revise_until_clean must name a judge member or human as verdict_source.
6. Require multiple termination guards: max_iterations, a revision cap on each gate, a no-progress stop, and either a budget cap or an explicit human stop point.
7. Before any cross-vendor council member is selected, state what context will leave the user's machine, which CLI receives it, which redaction globs apply, and that both execution paths require first-send consent.
8. Show an ASCII flow preview of the planned loop and ask for confirmation before final emission. Optimize for Claude Code CLI readability.
9. Emit these files into the target:
   • loop.yaml
   • loop.resolved.json
   • LOOP.md
   • RUN_IN_SESSION.md
   • run-loop.py
   • loop-workspace/
   • README.md
10. After writing loop.yaml, run: LOOPER_PYTHON="${CLAUDE_SKILL_DIR}/.venv/bin/python"; [ -x "$LOOPER_PYTHON" ] || LOOPER_PYTHON=python3; "$LOOPER_PYTHON" ${CLAUDE_SKILL_DIR}/scripts/looper.py compile <target>/loop.yaml --out <target>/loop.resolved.json --render <target>/LOOP.md --session-prompt <target>/RUN_IN_SESSION.md If python3 is not available, try python.
11. Ask whether the user wants to run the loop now in this session. If yes, follow RUN_IN_SESSION.md directly as the active task. If no, explain that the same file is the easy restart path and run-loop.py is available for advanced external execution.

File Rules

• Write argv arrays, never shell command strings, for all model and check invocations.
• Do not write API keys, access tokens, passwords, or CLI auth material into loop.yaml, loop.resolved.json, or model registries.
• Default redaction globs are .env, .env.*, secrets/**, and **/*.key.
• Keep loop.yaml human-readable and commented where useful. The emitted runner reads only loop.resolved.json.
• Keep RUN_IN_SESSION.md as the default/easy execution handoff. It is meant for the current LLM session or a future pasted prompt.
• Copy templates/run-loop.py exactly unless the user explicitly asks to edit the external runner contract.

Helper Scripts

• Detect model CLIs: LOOPER_PYTHON="${CLAUDE_SKILL_DIR}/.venv/bin/python"; [ -x "$LOOPER_PYTHON" ] || LOOPER_PYTHON=python3; "$LOOPER_PYTHON" ${CLAUDE_SKILL_DIR}/scripts/looper.py detect-models --write
• Register a custom CLI: LOOPER_PYTHON="${CLAUDE_SKILL_DIR}/.venv/bin/python"; [ -x "$LOOPER_PYTHON" ] || LOOPER_PYTHON=python3; "$LOOPER_PYTHON" ${CLAUDE_SKILL_DIR}/scripts/looper.py register-model <id> --invoke <cmd> [args...]
• Compile and render: LOOPER_PYTHON="${CLAUDE_SKILL_DIR}/.venv/bin/python"; [ -x "$LOOPER_PYTHON" ] || LOOPER_PYTHON=python3; "$LOOPER_PYTHON" ${CLAUDE_SKILL_DIR}/scripts/looper.py compile <target>/loop.yaml --out <target>/loop.resolved.json --render <target>/LOOP.md --session-prompt <target>/RUN_IN_SESSION.md
• Render only the in-session handoff: LOOPER_PYTHON="${CLAUDE_SKILL_DIR}/.venv/bin/python"; [ -x "$LOOPER_PYTHON" ] || LOOPER_PYTHON=python3; "$LOOPER_PYTHON" ${CLAUDE_SKILL_DIR}/scripts/looper.py session-prompt <target>/loop.resolved.json --out <target>/RUN_IN_SESSION.md

Confirmation Flow Preview

Use this shape and customize labels:

+--------------------------------+
| 1. Goal + context              |
| read sources                   |
+--------------------------------+
               |
               v
+--------------------------------+
| 2. Draft plan.md               |
| state -> state.json            |
+--------------------------------+
               |
               v
+--------------------------------+
| 3. Plan gate                   |
| verdict: reviewer-1            |
+--------------------------------+
               | needs work -> revise <= 3 -> step 2
               | pass
               v
+--------------------------------+
| 4. Write delivery-N.md         |
| log -> run-log.md              |
+--------------------------------+
               |
               v
+--------------------------------+
| 5. Delivery gate               |
| verdict: reviewer-1            |
+--------------------------------+
               | needs work -> revise <= 3 -> step 4
               | pass
               v
+--------------------------------+
| 6. Final output                |
| all gates clean                |
+--------------------------------+

Stops: pass gates | max 12 iterations | no progress x2 | budget 30m, $5.0

Emit Checklist

• The goal has a clear outcome, scope boundary, context sources, and done state.
• Verification criteria are typed as programmatic, judge, or human.
• At least one criterion is not purely vibe-based unless the user explicitly accepts that risk.
• Each revise_until_clean gate has a valid verdict_source.
• Every external invocation is an argv array with a timeout.
• Cross-vendor egress is scoped, redacted, and consent-gated.
• loop_control has iteration, revision, no-progress, and wall-clock or budget caps.
• Execution boundary and isolation are explicit, even when the choice is the current workspace.
• Observability names a run-log.md and state.json path.
• loop.resolved.json, LOOP.md, and RUN_IN_SESSION.md compile successfully before handoff.