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.
git clone --depth 1 https://github.com/Fmarzochi/EGCWrote 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/hooks/fmarzochi/egc/session-end)<a href="https://agentmods.dev/hooks/fmarzochi/egc/session-end"><img src="https://agentmods.dev/badge/hooks/fmarzochi/egc/session-end/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/hooks/fmarzochi/egc/session-end"><img src="https://agentmods.dev/badge/hooks/fmarzochi/egc/session-end.svg" alt="Reviewed on agentmods" width="80" height="20"></a>Grade A, and why
SessionEnd scanned grade A with 1 finding 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 commands this hook runs, not an audit. A hook is shell that executes on your machine at the event it names, which is why every command in it is printed with what was found.
Runs shell commandslowCapability
Expected in a hook, worth knowing in a rule or an instructions file.
"command": "node -e \"const fs=require('fs');const path=require('path');const {spawnSync}=require('child_process');const raw=fs.readFileSync(0,'utf8');const rel=path.join('scripts','hooks','run-with-flags.js');const hasR This is a copy
92% identical to PreCompact — 28 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.
How it starts
The opening of the file, as written. The whole thing — 52 lines — stays where its author put it; the contents beside it link to each section on GitHub.
{
"SessionEnd": [
{
"matcher": "*",
"hooks": [
{
"type": "command",
"command": "node -e \"const fs=require('fs');const path=require('path');const {spawnSync}=require('child_process');const raw=fs.readFileSync(0,'utf8');const rel=path.join('scripts','hooks','run-with-flags.js');const hasRunnerRoot=candidate=>{const value=typeof candidate==='string'?candidate.trim():'';return value.length>0&&fs.existsSync(path.join(path.resolve(value),rel));};const root=(()=>{const envRoot=process.env.EGC_PLUGIN_ROOT||process.env.ECC_PLUGIN_ROOT||process.env.GEMINI_PLUGIN_ROOT||'';if(hasRunnerRoot(envRoot))return path.resolve(envRoot.trim());const home=require('os').homedir();const claudeDir=path.join(home,'.gemini');if(hasRunnerRoot(claudeDir))return claudeDir;for(const candidate of [path.join(claudeDir,'plugins','egc'),path.join(claudeDir,'plugins','egc@egc'),path.join(claudeDir,'plugins','marketplace','egc'),path.join(claudeDir,'plugins','everything-gemini'),path.join(claudeDir,'plugins','everything-gemini@everything-gemini'),path.join(claudeDir,'plugins','marketplace','everything-gemini')]){if(hasRunnerRoot(candidate))return candidate;}try{for(const slug of ['egc','everything-gemini']){const cacheBase=path.join(claudeDir,'plugins','cache',slug);for(const org of fs.readdirSync(cacheBase,{withFileTypes:true})){if(!org.isDirectory())continue;for(const version of fs.readdirSync(path.join(cacheBase,org.name),{withFileTypes:true})){if(!version.isDirectory())continue;const candidate=path.join(cacheBase,org.name,version.name);if(fs.existsSync(path.join(candidate,rel)))return candidate;}}}}catch{}return claudeDir;})();const script=path.join(root,rel);if(fs.existsSync(script)){const result=spawnSync(process.execPath,[script,'session:end:marker','scripts/hooks/session-end-marker.js','minimal,standard,strict'],{input:raw,encoding:'utf8',env:process.env,cwd:process.cwd(),timeout:30000});const stdout=typeof result.stdout==='string'?result.stdout:'';What else hooks.json configures
This page is one entry in a file that holds 8. Installing the file brings all of them; each is measured and scanned on its own page.
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 · 52 lines scan A d94f927519f9
SessionEnd is a hook published in the GitHub repository Fmarzochi/EGC (68 stars, last pushed yesterday), licensed Apache-2.0. Its token cost is not measured: a hook is shell that never enters the context. A static security scan graded it A with 1 finding (runs shell commands). It is 92% identical to PreCompact, differing in 28 lines, and is treated as a copy.
Other hooks, from other repositories
SessionStart
Runs when a session starts on startup, executing install_pkgs.sh. From supabase/supabase.
PostToolUse
Runs after a tool call finishes for Write and Edit tool calls, executing format_and_lint.sh. From supabase/supabase.
SessionStart
Runs when a session starts, executing on-start.js via node. From google-gemini/gemini-cli.
PreToolUse
Runs before the agent uses a tool for Bash tool calls, running an inline shell check. From apache/superset.
PreToolUse
Runs before the agent uses a tool, executing pre-write.sh and pre-bash.sh (2 commands). From anthropics/claude-cookbooks.
PostToolUse
Runs after a tool call finishes for Bash tool calls, executing hooks.sh via sh (3 commands). From anthropics/claude-plugins-official.