Ralph Loop (Agent Mode)
Guide OpenClaw agents to execute Ralph Wiggum loops using exec and process tools. Agent orchestrates coding agents (Codex, Claude Code, OpenCode, Goose) with proper TTY support via pty:true. Plans/builds code via PROMPT.md + AGENTS.md, SPECS and IMPLEMENTATION_PLAN.md. Includes PLANNING vs BUILDING modes, backpressure, sandboxing, and completion conditions. Users request loops, agents execute using tools.
Like a lobster shell, security has layers — review code before you run it.
License
SKILL.md
Ralph Loop
Overview
This skill guides OpenClaw agents to execute Ralph Loop workflows using the exec and process tools. The agent orchestrates AI coding agent sessions following the Ralph playbook flow:
- Define Requirements → JTBD → Focus Topics →
specs/*.md - PLANNING Loop → Create/update
IMPLEMENTATION_PLAN.md(do not implement) - BUILDING Loop → Implement tasks, run tests (backpressure), update plan, commit
The loop persists context via PROMPT.md + AGENTS.md (loaded each iteration) and the plan/specs on disk.
How This Skill Works
This skill generates instructions for OpenClaw agents to execute Ralph Loops using the exec and process tools.
- The agent calls
exectool with the coding agent command - Uses
pty: trueto provide TTY for interactive CLIs - Uses
background: truefor monitoring capabilities - Uses
processtool to monitor progress and detect completion
Important: Users don't run these scripts directly - the OpenClaw agent executes them using its tool capabilities.
TTY Requirements
Some coding agents require a real terminal (TTY) to work properly, or they will hang:
Interactive CLIs (need TTY):
- OpenCode, Codex, Claude Code, Pi, Goose
Non-interactive CLIs (file-based):
- aider, custom scripts
Solution: Use exec + process mode for interactive CLIs, simple loops for file-based tools.
Agent Tool Usage Patterns
Interactive CLIs (Recommended Pattern)
For OpenCode, Codex, Claude Code, Pi, and Goose - these require TTY support:
When I (the agent) receive a Ralph Loop request, I will:
-
Use exec tool to launch the coding agent:
exec tool with parameters: - command: "opencode run --model <MODEL> \"$(cat PROMPT.md)\"" - workdir: <project_path> - background: true - pty: true - yieldMs: 60000 - timeout: 3600 -
Capture session ID from exec tool response
-
Use process tool to monitor:
process tool with: - action: "poll" - sessionId: <captured_session_id> process tool with: - action: "log" - sessionId: <captured_session_id> - offset: -30 (for recent output) -
Check completion by reading
IMPLEMENTATION_PLAN.mdfor sentinel text -
Clean up with process kill if needed:
process tool with: - action: "kill" - sessionId: <session_id>
Benefits: TTY support, real-time logs, timeout handling, parallel sessions, workdir isolation
Agent Workflow
1) Gather Inputs
Required:
- Goal / JTBD
- CLI (
opencode,codex,claude,goose,pi, other) - Mode (
PLANNING,BUILDING, orBOTH) - Max iterations (default: PLANNING=5, BUILDING=10)
Optional:
- Completion sentinel (default:
STATUS: COMPLETEinIMPLEMENTATION_PLAN.md) - Working directory (default:
$PWD) - Timeout per iteration (default: 3600s)
- Sandbox choice
- Auto-approval flags (
--full-auto,--yolo,--dangerously-skip-permissions)
Auto-detect:
- If CLI in interactive list → use exec tool with pty: true
- Extract model flag from CLI requirements
2) Requirements → Specs (Optional)
If requirements are unclear:
- Break JTBD into focus topics
- Draft
specs/<topic>.mdfor each - Keep specs short and testable
3) PROMPT.md + AGENTS.md
PROMPT.md references:
specs/*.mdIMPLEMENTATION_PLAN.md- Relevant project files
AGENTS.md includes:
- Test commands (backpressure)
- Build/run instructions
- Operational learnings
4) Prompt Templates
PLANNING Prompt (no implementation):
You are running a Ralph PLANNING loop for this goal: <goal>.
Read specs/* and the current codebase. Only update IMPLEMENTATION_PLAN.md.
Rules:
- Do not implement
- Do not commit
- Create a prioritized task list
- Write down questions if unclear
Completion:
When plan is ready, add: STATUS: PLANNING_COMPLETE
BUILDING Prompt:
You are running a Ralph BUILDING loop for this goal: <goal>.
Context: specs/*, IMPLEMENTATION_PLAN.md, AGENTS.md
Tasks:
1) Pick the most important task
2) Investigate code
3) Implement
4) Run backpressure commands from AGENTS.md
5) Update IMPLEMENTATION_PLAN.md
6) Update AGENTS.md with learnings
7) Commit with clear message
Completion:
When all done, add: STATUS: COMPLETE
5) CLI Command Reference
The agent constructs command strings using these patterns:
| CLI | Command String Pattern |
|---|---|
| OpenCode | opencode run --model <MODEL> "$(cat PROMPT.md)" |
| Codex | codex exec <FLAGS> "$(cat PROMPT.md)" (requires git) |
| Claude Code | claude <FLAGS> "$(cat PROMPT.md)" |
| Pi | pi --provider <PROVIDER> --model <MODEL> -p "$(cat PROMPT.md)" |
| Goose | goose run "$(cat PROMPT.md)" |
Common flags:
- Codex:
--full-auto,--yolo,--model <model> - Claude:
--dangerously-skip-permissions
Detailed Agent Tool Usage Examples
Example 1: OpenCode Ralph Loop
Agent executes this sequence:
Step 1: Launch OpenCode with exec tool
{
command: "opencode run --model github-copilot/claude-opus-4.5 \"$(cat PROMPT.md)\"",
workdir: "/path/to/project",
background: true,
pty: true,
timeout: 3600,
yieldMs: 60000
}
Step 2: Capture session ID from response
sessionId: "abc123"
Step 3: Monitor with process tool every 10-30 seconds
{
action: "poll",
sessionId: "abc123"
}
Step 4: Check recent logs
{
action: "log",
sessionId: "abc123",
offset: -30
}
Step 5: Read IMPLEMENTATION_PLAN.md to check for completion
- Look for: "STATUS: COMPLETE" or "STATUS: PLANNING_COMPLETE"
Step 6: If complete or timeout, cleanup
{
action: "kill",
sessionId: "abc123"
}
Example 2: Codex with Full Auto
Agent tool calls:
exec tool:
{
command: "codex exec --full-auto --model anthropic/claude-opus-4 \"$(cat PROMPT.md)\"",
workdir: "/path/to/project",
background: true,
pty: true,
timeout: 3600
}
# Then monitor with process tool as above
Completion Detection
Use flexible regex to match variations:
grep -Eq "STATUS:?\s*(PLANNING_)?COMPLETE" IMPLEMENTATION_PLAN.md
Matches:
STATUS: COMPLETESTATUS:COMPLETESTATUS: PLANNING_COMPLETE## Status: PLANNING_COMPLETE
Safety & Safeguards
Auto-Approval Flags (Risky!)
- Codex:
--full-auto(sandboxed, auto-approve) or--yolo(no sandbox!) - Claude:
--dangerously-skip-permissions - Recommendation: Use sandboxes (docker/e2b/fly) and limited credentials
Escape Hatches
- Stop:
Ctrl+C - Kill session: process tool with action: "kill"
- Rollback:
git reset --hard HEAD~N
Best Practices
- Start small: Test with 1-2 iterations first
- Workdir isolation: Prevent reading unrelated files
- Set timeouts: Default 1h may not fit all tasks
- Monitor actively: Check logs, don't terminate prematurely
- Requirements first: Clear specs before building
- Backpressure early: Add tests from the start
Troubleshooting
| Problem | Solution |
|---|---|
| OpenCode hangs | Ensure agent uses exec tool with pty: true |
| Session won't start | Check CLI path, git repo, command syntax |
| Completion not detected | Verify sentinel format in IMPLEMENTATION_PLAN.md |
| Process timeout | Agent should increase timeout parameter or simplify tasks |
| Parallel conflicts | Agent should use git worktrees for isolation |
| Can't see progress | Agent should use process tool with action: "log" |
License
MIT
Credits
This skill builds upon work by:
- @jordyvandomselaar - Original Ralph Loop concept and workflow design
- @steipete - Coding agent patterns and exec/process tool usage with pty support
Key improvement: Uses OpenClaw's exec tool with pty: true to provide TTY for interactive CLIs, solving the hanging issue that occurs with simple background bash execution.
Files
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