Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add shdennlin/agent-plugins/plugin install ralph-loopWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/commands/shdennlin/agent-plugins/ralph-loop)<a href="https://agentmods.dev/commands/shdennlin/agent-plugins/ralph-loop"><img src="https://agentmods.dev/badge/commands/shdennlin/agent-plugins/ralph-loop/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/commands/shdennlin/agent-plugins/ralph-loop"><img src="https://agentmods.dev/badge/commands/shdennlin/agent-plugins/ralph-loop.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00006 | $0.00296 |
| Opus 5.5 | $0.00002 | $0.00118 |
| Sonnet 5.5 | $0.00001 | $0.00059 |
| Haiku 4.5 | $0.00001 | $0.00030 |
Grade A, and why
ralph-loop scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
Ralph Loop Command
MANDATORY FIRST STEP — DO NOT SKIP
You MUST execute this Bash command BEFORE doing anything else. Do NOT respond to the prompt, do NOT output any text, do NOT skip this step. The setup script creates the state file that enables the loop. Without it, the loop will not work.
"${CLAUDE_PLUGIN_ROOT}/scripts/setup-ralph-loop.sh" $ARGUMENTS
If the script outputs an error, report it to the user and stop. Do NOT proceed without a successful setup.
After setup succeeds
Work on the task described in the prompt. When you try to exit, the Ralph loop will feed the SAME PROMPT back to you for the next iteration. You'll see your previous work in files and git history, allowing you to iterate and improve.
CRITICAL RULE: If a completion promise is set, you may ONLY output it when the statement is completely and unequivocally TRUE. Do not output false promises to escape the loop, even if you think you're stuck or should exit for other reasons. The loop is designed to continue until genuine completion.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 25 lines · 6 tokens per session scan A 5baed673f790
ralph-loop is a command published in the GitHub repository shdennlin/agent-plugins (3 stars, last pushed yesterday), licensed MIT. It adds 6 tokens to every session and 296 once invoked, about $0.0000 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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