agentmods.dev

SessionStart

SessionStart is a hook for coding agents from frankchu91/mindbase-llm-wiki. Its token cost is not measured, scanned A, a copy of SessionStart, MIT.

A startup hook that runs a shell check when an agent session starts, is cleared, or is compacted. A hook is an automatic action tied to one of these session events.

In plain words
What is it for?
Running the configured session-start command during startup, after clearing a session, and after compacting its context.
Why use it?
It lets the environment perform the same check automatically at key points in a session.

Hook

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 mb plugin — 1 skill, 12 commands, 5 agents, 1 hook, 1 MCP server shipped together

not rated 93 +2 10d ago A scan tokens not measured copy · 72% MIT
View the source file frankchu91/mindbase-llm-wiki
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 frankchu91/mindbase-llm-wiki
Claude Code
/plugin install mb

Or install mb, the plugin that ships this one along with the rest of its 1 skill, 12 commands, 5 agents, 1 hook, 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/frankchu91/mindbase-llm-wiki/session-start.svg)](https://agentmods.dev/hooks/frankchu91/mindbase-llm-wiki/session-start)
Your own site
<a href="https://agentmods.dev/hooks/frankchu91/mindbase-llm-wiki/session-start"><img src="https://agentmods.dev/badge/hooks/frankchu91/mindbase-llm-wiki/session-start.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 Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. Scan, not verified.
Origin 72% copy Near-identical to another mod 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 4d 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.

Origin

This is a copy

72% identical to SessionStart — 3 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.

apps/plugin/hooks/hooks.json · 14 lines

What it actually says

{
  "SessionStart": [
    {
      "matcher": "startup|clear|compact",
      "hooks": [
        {
          "type": "command",
          "command": "${CLAUDE_PLUGIN_ROOT}/hooks/session-start",
          "async": false
        }
      ]
    }
  ]
}
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. 4d ago First seen · 14 lines scan A e0851244e2d3

Subscribe to this mod's changes

SessionStart is a hook published in the GitHub repository frankchu91/mindbase-llm-wiki (93 stars, last pushed 10d 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. It is 72% identical to SessionStart, differing in 3 lines, and is treated as a copy.

LLMaikarpathyknowledge-basellm-wikillm-wiki-karpathy
Related

Other hooks, from other repositories

SessionStart

Runs when a session starts on startup, resume and compact, executing memforge_hook.py via sh with --client. From shno-labs/mem-forge.

shno-labs/mem-forge · not measured

PostToolUse

Runs after a tool call finishes for Write and Edit tool calls, running an inline shell check. From eliransu/digital-brain.

eliransu/digital-brain · not measured

PostToolUse

Runs after a tool call finishes for Write and Edit tool calls, executing format_and_lint.sh. From supabase/supabase.

supabase/supabase · not measured

SessionStart

Runs when a session starts, executing on-start.js via node. From google-gemini/gemini-cli.

google-gemini/gemini-cli · not measured

SessionStart

Runs when a session starts on startup, executing install_pkgs.sh. From supabase/supabase.

supabase/supabase · not measured

PreToolUse

Runs before the agent uses a tool for Bash tool calls, running an inline shell check. From apache/superset.

apache/superset · not measured