SessionStart

SessionStart is a hook for Claude Code from iamtouchskyer/memex. Its token cost is not measured, scanned A, original, MIT.

A session-start hook that synchronizes Memex notes and reports how many knowledge cards are grouped in its index. Memex is a system for storing and recalling reusable project knowledge.

In plain words
What is it for?
It helps refresh the knowledge index, search past notes about the current topic, and remind the agent to perform a later review.
Why use it?
It helps the agent remember relevant solutions from earlier work before starting a new task and prompts it to record lessons afterward.

Hook for Claude Code

Written for Claude Code: ${CLAUDE_PLUGIN_ROOT} variable. Also seen: mentions CLAUDE.md; positional $N argument; mentions Claude Code.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the memex plugin — 7 skills, 2 hooks, 1 MCP server shipped together

One of 2 entries in hooks.json upstream. Installing this one merges just its entry into your config; the other 1 are separate, each on its own page.

Good fit It helps refresh the knowledge index, search past notes about the current topic, and remind the agent to perform a later review.

Compare 6 hooks from other repositories ↓
Install

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.

Claude Code
/plugin marketplace add iamtouchskyer/memex
Claude Code
/plugin install memex

Made for: Claude Code.

Or install memex, the plugin that ships this one along with the rest of its 7 skills, 2 hooks, 1 MCP server.

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 SessionStart

README.md
[![agentmods](https://agentmods.dev/badge/hooks/iamtouchskyer/memex/session-start/github.svg)](https://agentmods.dev/hooks/iamtouchskyer/memex/session-start)
Your own site
<a href="https://agentmods.dev/hooks/iamtouchskyer/memex/session-start"><img src="https://agentmods.dev/badge/hooks/iamtouchskyer/memex/session-start/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.

agentmods 80×15 button for SessionStart

Your own site · 80×15
<a href="https://agentmods.dev/hooks/iamtouchskyer/memex/session-start"><img src="https://agentmods.dev/badge/hooks/iamtouchskyer/memex/session-start.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
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. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

SessionStart 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 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.

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.

hooks/hooks.json · 13 lines

How it starts

The opening of the file, as written. The whole thing — 13 lines — stays where its author put it; the contents beside it link to each section on GitHub.

{
  "SessionStart": [
    {
      "matcher": "",
      "hooks": [
        {
          "type": "command",
          "command": "MEMEX_CLI_PATH=\"${CLAUDE_PLUGIN_ROOT}/dist/cli.js\"; if [ ! -f \"$MEMEX_CLI_PATH\" ]; then echo '## Memex: plugin dist not found\n\nReinstall the memex Claude Code plugin or run: `npm install -g @touchskyer/memex`'; exit 0; fi && node \"$MEMEX_CLI_PATH\" sync 2>/dev/null; TOTAL=$(node \"$MEMEX_CLI_PATH\" read index 2>/dev/null | grep -c '^\\- \\[\\[' || true); SECTIONS=$(node \"$MEMEX_CLI_PATH\" read index 2>/dev/null | awk '/^## /{ if(s) print s\" (\"c\" cards)\"; s=$0; c=0; next } /^\\- \\[\\[/{ c++ } END{ if(s) print s\" (\"c\" cards)\" }'); if [ \"$TOTAL\" -gt 0 ]; then RECALL=\"When the task touches a topic above, run \\`memex search <keyword>\\` then \\`memex read <slug>\\` for the top hits.\nDo this BEFORE writing code or starting diagnosis — your past self already solved adjacent problems.\nFor full recall: invoke the \\`memex-recall\\` skill.\"; else RECALL=\"No cards yet. Still invoke the \\`memex-recall\\` skill — keyword search may find matches even without an index.\nAfter completing work, invoke \\`memex-retro\\` to start building your knowledge base.\"; fi; echo \"## Memex Memory System Active ($TOTAL cards)\n\n### Your Knowledge Map\n$SECTIONS\n\n### Recall — before starting work\n$RECALL\nNever include actual secrets, credentials, tokens, or exact secret file contents in memex query/body arguments; use abstract descriptions or redacted examples.\n\n### Retro — after completing work\nAfter code changes, debugging, or architectural decisions: invoke \\`memex-retro\\` skill.\nAsk: 'Did I learn something reusable?' If yes, write a card.\nCard format: title, created (YYYY-MM-DD), source: retro, category. Slugs: English kebab-case.\nLanguage: match the user's CLAUDE.md preferences.\" && last_org=$(cat ~/.memex/.last-organize 2>/dev/null || true) && if [ -n \"$last_org\" ]; then days_since=$(( ($(date +%s) - $(python3 -c \"import 

Read the full file on GitHub · 13 lines

Same file

What else hooks.json configures

This page is one entry in a file that holds 2. Installing the file brings all of them; each is measured and scanned on its own page.

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. 1mo ago First seen · 13 lines scan A e255b580037b

Subscribe to this mod's changes

SessionStart is a hook published in the GitHub repository iamtouchskyer/memex (144 stars, last pushed 1mo ago), licensed MIT. Its token cost is not measured: a hook is shell that never enters the context. 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.