fuse-lessons

fuse-lessons is a plugin for Claude Code from fusengine/agents. Its manifest loads nothing; the 2 commands, 1 agent it bundles cost 127 tokens per session together, scanned A, original, MIT.

A project-memory add-on that reads lessons from MEMORY/LESSON.md at the start of sessions and sub-agent work, then writes a short lesson when work finishes.

In plain words
What is it for?
Use it in projects that want automatic sharing of post-mortem lessons across agents and sessions.
Why use it?
It carries past mistakes and decisions into future coding sessions, reducing the chance that the same problem will be repeated.

Plugin for Claude Code

Written for Claude Code: a Claude Code plugin manifest. Also seen: mentions subagents.

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 fusengine/agents
agentmods
npx agentmods add plugins/fusengine/agents/fuse-lessons
Clone the repo
git clone --depth 1 https://github.com/fusengine/agents

Made for: Claude Code.

Wrote 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.

agentmods badge for fuse-lessons

README.md
[![agentmods](https://agentmods.dev/badge/plugins/fusengine/agents/fuse-lessons.svg)](https://agentmods.dev/plugins/fusengine/agents/fuse-lessons)
Your own site
<a href="https://agentmods.dev/plugins/fusengine/agents/fuse-lessons"><img src="https://agentmods.dev/badge/plugins/fusengine/agents/fuse-lessons.svg" alt="Measured on agentmods" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured The manifest loads nothing itself; its 2 commands, 1 agent cost 127 tokens a session between them.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

fuse-lessons 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 today.

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.

plugins/fuse-lessons/.claude-plugin/plugin.json · 20 lines

What it actually says

{
  "name": "fuse-lessons",
  "version": "1.0.6",
  "description": "Project memory: writes compact 'never reproduce' lessons to MEMORY/LESSON.md on finish, force-reads them at session/subagent start.",
  "author": {
    "name": "Fusengine",
    "url": "https://github.com/fusengine"
  },
  "homepage": "https://github.com/fusengine/agents",
  "license": "MIT",
  "keywords": [
    "memory",
    "lessons",
    "hooks",
    "postmortem"
  ],
  "category": "development",
  "strict": true
}
Contents

What it installs

The manifest is a name and a version. 2 commands, 1 agent travel with it, and installing the plugin installs all of them — 127 tokens a session between them. Each is measured on its own page, and each can be installed alone.

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. today Changed 913a48070a72
  2. 2d ago First seen · 20 lines scan A e97d10ce45d2

Subscribe to this mod's changes

fuse-lessons is a plugin published in the GitHub repository fusengine/agents (25 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 2026-09-03.