coalwash

A plugin for cleaning and reorganizing agent memory and governance files. It also archives transcripts without changing their contents and checks that structured details such as links, dates, versions, and metadata are preserved.

In plain words
What is it for?
Use it to clean supported memory and governance files, preserve snapshots for rollback, and archive transcripts byte-for-byte. Its description says it slows memory growth rather than eliminating memory costs.
Why use it?
It reduces the growth of memory-related overhead while keeping important structured information intact. It is designed to work offline without API keys.

Plugin for Claude Code

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 TheColliery/CoalWash
agentmods
npx agentmods add plugins/thecolliery/coalwash/plugin
Clone the repo
git clone --depth 1 https://github.com/TheColliery/CoalWash

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 100% copy Near-identical to another mod in the catalogue.
Security

Grade A, and why

coalwash 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 2d 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.

Origin

This is a copy

100% identical to coalwash — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

plugin/.claude-plugin/plugin.json · 21 lines

What it actually says

{
  "name": "coalwash",
  "version": "1.4.1",
  "description": "CoalWash — memory-defragment/cleanup engine for agent memory, two lanes: class-B (memory + governance files) gets the semantic wash — a free mechanical Quick pass plus a code-enforced fidelity gate blocking any STRUCTURED-token drop by diff (links, dates, versions, frontmatter; prose fidelity is the paid semantic layer's job), consent-gated Full pass, every cut snapshot-backed (whole-run rollback); class-A (transcripts — the estate) gets byte-identity ULTRA archiving, never semantic-edited. Honest frame: slows how fast memory-overhead grows — it does not eliminate memory cost. Zero-dependency, offline, no API keys.",
  "author": {
    "name": "HetCreep"
  },
  "homepage": "https://github.com/TheColliery/CoalWash",
  "repository": "https://github.com/TheColliery/CoalWash",
  "license": "Apache-2.0",
  "keywords": [
    "memory-defrag",
    "memory-cleanup",
    "fidelity",
    "token-saving",
    "governance",
    "skills",
    "hooks"
  ]
}
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.

  1. 2d ago First seen · 21 lines scan A a17bca58ec5f

Subscribe to this mod's changes

coalwash is a plugin published in the GitHub repository TheColliery/CoalWash (11 stars, last pushed 3d ago), licensed Apache-2.0. 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. It is 100% identical to coalwash, differing in 0 lines, and is treated as a copy.