A plugin that repeatedly runs Claude with the same development prompt while Claude's earlier file and Git changes remain available. This iterative method is known as the Ralph Wiggum technique.

Use it for iterative development tasks such as refactoring a cache layer or adding tests, with an optional iteration limit or completion signal.

It supports repeated attempts at a task when one pass may leave incomplete work or problems to fix.

ralph-loop — Plugin by codecast-sh

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Claude Code

/plugin marketplace add codecast-sh/codecast

agentmods

npx agentmods add plugins/codecast-sh/codecast/1.0.0

Clone the repo

git clone --depth 1 https://github.com/codecast-sh/codecast

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Security

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 yesterday.

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.

packages/cli/src/capabilities/__fixtures__/manifests/home/.claude/plugins/cache/claude-plugins-official/ralph-loop/1.0.0/.claude-plugin/plugin.json · 10 lines

What it actually says

{
  "name": "ralph-loop",
  "version": "1.0.0",
  "description": "Continuous self-referential AI loops for interactive iterative development, implementing the Ralph Wiggum technique. Run Claude in a while-true loop with the same prompt until task completion.",
  "author": {
    "name": "Anthropic",
    "email": "[email protected]"
  }
}

Changes

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.

yesterday First seen · 10 lines scan A 4a92d87b112e

Subscribe to this mod's changes

ralph-loop is a plugin published in the GitHub repository codecast-sh/codecast (30 stars, last pushed yesterday), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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 2026-08-30.

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