agentmods.dev

SessionStart

SessionStart is a hook for Claude Code from HCAI-Lab-GT/gt-hive. Its token cost is not measured, scanned A, a copy of SessionStart, MIT.

A session-start hook that runs a shell script called check-update.sh when a session begins. The hook comes from the HCAI-Lab-GT/gt-hive project.

In plain words
What is it for?
Use it to trigger that update-check script at the beginning of every session.
Why use it?
It provides an automatic point at session startup for running the project's update check. The supplied details do not explain what the script checks or changes.

Hook for Claude Code

Written for Claude Code: $CLAUDE_PLUGIN_ROOT variable.

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 gt-hive-pace plugin — 3 skills, 3 commands, 1 hook shipped together

not rated 4repo 1mo ago A scan tokens not measured copy · 48% MIT

Good fit Use it to trigger that update-check script at the beginning of every session.

Compare 6 hooks from other repositories ↓
View source ↗ HCAI-Lab-GT/gt-hive
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 HCAI-Lab-GT/gt-hive
Claude Code
/plugin install gt-hive-pace

Made for: Claude Code.

Or install gt-hive-pace, the plugin that ships this one along with the rest of its 3 skills, 3 commands, 1 hook.

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/hcai-lab-gt/gt-hive/session-start.svg)](https://agentmods.dev/hooks/hcai-lab-gt/gt-hive/session-start)
Your own site
<a href="https://agentmods.dev/hooks/hcai-lab-gt/gt-hive/session-start"><img src="https://agentmods.dev/badge/hooks/hcai-lab-gt/gt-hive/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. A grade says what 26 rules found in the file — not that it is safe.
Origin 48% 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 8d 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

48% identical to SessionStart — 7 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.

claude/hooks/hooks.json · 14 lines

What it actually says

{
  "SessionStart": [
    {
      "matcher": "*",
      "hooks": [
        {
          "type": "command",
          "command": "bash $CLAUDE_PLUGIN_ROOT/scripts/check-update.sh",
          "timeout": 15
        }
      ]
    }
  ]
}
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. 8d ago First seen · 14 lines scan A bac16720f84d

Subscribe to this mod's changes

SessionStart is a hook published in the GitHub repository HCAI-Lab-GT/gt-hive (4 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. It is 48% identical to SessionStart, differing in 7 lines, and is treated as a copy.

Related

Other hooks, from other repositories

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 on startup, executing install_pkgs.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

PreToolUse

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

apache/superset · not measured

PreToolUse

Runs before the agent uses a tool, executing pre-write.sh and pre-bash.sh (2 commands). From anthropics/claude-cookbooks.

anthropics/claude-cookbooks · not measured

PreCompact

Runs before the context is compacted for manual and auto tool calls, executing hook-handler.cjs via node (4 commands). From ruvnet/RuView.

ruvnet/RuView · not measured