prp-loop

Development

Run the autonomous cyclic PRP pipeline end to end (plan → implement → pr → review, looping review→fix until the PR is clean). Use when the user wants to "ship feature X end to end", "run the full PRP loop", "auto-implement and open a PR for a feature", or invokes /prp-loop.

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Source SKILL.md: https://github.com/Wirasm/PRPs-agentic-eng/blob/HEAD/.claude/skills/prp-loop/SKILL.md

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PRP Loop — autonomous cyclic pipeline

Launch the orchestrator that drives plan → implement → pr → review and loops review → fix until the PR review is clean (or limits are hit). It runs headless claude -p once per stage and tracks progress in .claude/prp-loop.state.json.

Run it

Start a new loop with the user's request as the feature argument:

uv run .claude/PRPs/scripts/prp_loop.py "$ARGUMENTS"

Resume a halted or in-progress loop:

uv run .claude/PRPs/scripts/prp_loop.py --resume

Defaults: --max-cycles 3, --max-implement-iterations 10, base branch auto-detected. Pass --validate "<cmd>" to give the loop an authoritative green check (exit 0 = pass).

Stop after a stage (`--until`)

Pass --until <stage> (plan | implement | pr | review | fix) to halt once that stage completes:

uv run .claude/PRPs/scripts/prp_loop.py "$ARGUMENTS" --until implement

--until implement runs plan → implement and stops once validations are green and the work is committed — no PR, no review. This is the headless replacement for the old single-session Ralph loop: "grind one plan to green."

UX note: the retired Ralph loop was single-session and interactive (a Stop-hook fed the prompt back in the same session). prp-loop --until implement is headless instead — it drives fresh claude -p sessions per iteration and you resume/inspect via the state file rather than watching it live.

What it does

plan — prp-plan writes .claude/PRPs/plans/<feature>.plan.md.
implement — prp-implement executes the plan, looping until all validations pass (bounded by --max-implement-iterations), then commits.
pr — prp-pr pushes the branch and opens the PR (once).
review — prp-review --agents reviews the PR and writes a {clean, blocking} verdict.
cycle — if not clean, the blocking findings feed back into a fix pass → push → re-review, up to --max-cycles. Clean → done.

Safety

Fully autonomous (--dangerously-skip-permissions). Operates only on the feature branch — it refuses to PR from main/master/development/the base branch.
Halts with state preserved on: implement/fix not green after the iteration limit, review still dirty after --max-cycles, a fix pass with no new commit (no progress), failed push, or any stage error.
Inspect or resume via .claude/prp-loop.state.json.

Notes

This orchestrator is self-contained and uses no Stop-hook. It owns both loops itself and detects "green" from each stage's VALIDATION: GREEN sentinel (or the --validate command). The PRP skills it calls are invoked verbatim and never modified.