ECC is a toolkit that organizes and improves how coding agents work through skills, memory, security checks, research practices, and related extensions. It is for developers using agents such as Claude Code, Codex, OpenCode, and Cursor.
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 affaan-m/ECC/plugin install eccWrote 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/affaan-m/ecc/auto-update)<a href="https://agentmods.dev/commands/affaan-m/ecc/auto-update"><img src="https://agentmods.dev/badge/commands/affaan-m/ecc/auto-update.svg" alt="Measured on agentmods" 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 | $0.00013 | $0.00513 |
| Opus 5 | $0.00006 | $0.00257 |
| Sonnet 5 | $0.00003 | $0.00103 |
| Haiku 4.5 | $0.00001 | $0.00051 |
Grade A, and why
auto-update scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
Copies of this mod
1 near-identical copy found in the catalogue:
- auto-update — 100% identical, 14 lines differ
What it actually says
Auto Update
Update ECC from its upstream repo and regenerate the current context's managed install using the original install-state request.
Usage
# Preview the update without mutating anything
ECC_ROOT="${CLAUDE_PLUGIN_ROOT:-$(node -e "var r=(function(){var p=require('path'),f=require('fs'),o=require('os');var e=process.env.CLAUDE_PLUGIN_ROOT;if(e&&e.trim())return e.trim();var d=p.join(o.homedir(),'.claude');function L(x){try{return require(p.join(x,'scripts','lib','resolve-ecc-root')).resolveEccRoot({probe:p.join('scripts','auto-update.js')})}catch(_){return null}}var r=L(d);if(r)return r;var s=['ecc','ecc@ecc','marketplaces/ecc','everything-claude-code','everything-claude-code@everything-claude-code','marketplaces/everything-claude-code'];for(var i=0;i<s.length;i++){r=L(p.join(d,'plugins',s[i]));if(r)return r}try{var g=['ecc','everything-claude-code'];for(var j=0;j<g.length;j++){var c=p.join(d,'plugins','cache',g[j]);var O=f.readdirSync(c);for(var k=0;k<O.length;k++){var q=p.join(c,O[k]);var V=f.readdirSync(q);for(var m=0;m<V.length;m++){r=L(p.join(q,V[m]));if(r)return r}}}}catch(_){}return d})();console.log(r)")}"
node "$ECC_ROOT/scripts/auto-update.js" --dry-run
# Update only Cursor-managed files in the current project
node "$ECC_ROOT/scripts/auto-update.js" --target cursor
# Override the ECC repo root explicitly
node "$ECC_ROOT/scripts/auto-update.js" --repo-root /path/to/everything-claude-code
Notes
- This command uses the recorded install-state request and reruns
install-apply.jsafter pulling the latest repo changes. - Reinstall is intentional: it handles upstream renames and deletions that
repair.jscannot safely reconstruct from stale operations alone. - Use
--dry-runfirst if you want to see the reconstructed reinstall plan before mutating anything.
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.
- 2d ago First seen · 29 lines · 13 tokens per session scan A c354e4b09a0d
auto-update is a command published in the GitHub repository affaan-m/ECC (248,541 stars, last pushed yesterday), licensed MIT. It adds 13 tokens to every session and 513 once invoked, about $0.0001 per session on Opus 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 2026-09-03.
Other commands, from other repositories
awesome-chatgpt
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test
Generate comprehensive tests.
commit
智能生成 Git 提交信息并提交.
init
Scaffold a new MindBase project (v2 layout). Usage: /mb:init [template] [-- mission ...].
pr
Handle the full workflow from current branch state to an open, CI-monitored pull request.
doctor.es
Diagnostica problemas de inferencia LLM en Mac: asiai doctor verifica el estado de los motores, conflictos de puertos, carga de modelos y estado de la GPU.