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agent-glovebox: Hook for Claude Code

.claude/settings.json

SessionStart is a hook for Claude Code from AlexanderMattTurner/agent-glovebox. Its token cost is not measured, scanned A, original, Apache-2.0.

A session-start hook that runs configured shell scripts when a coding-agent session begins. The listed scripts launch safely, check for hidden characters and risky MCP activity, prepare the session, and optionally forward an event.

In plain words
What is it for?
Use it to run startup safety checks, prepare a project session, and forward session-start events to a watcher when one is configured.
Why use it?
It automates checks and setup that would otherwise be easy to forget at the start of each session. Advisory mode lets these checks report issues without being described as blocking actions.

Hook for Claude Code

Written for Claude Code: $CLAUDE_PROJECT_DIR variable.

This is AlexanderMattTurner/agent-glovebox's own configuration. It tells Claude Code how to work on agent-glovebox itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything agent-glovebox configures →

One of 9 entries in settings.json — they are configured in one file and arrive together.

not rated 59 +2 changed yesterday A scan tokens not measured original Apache-2.0
View the source file AlexanderMattTurner/agent-glovebox
Reuse

Borrowing it

Nothing to install: this file belongs to AlexanderMattTurner/agent-glovebox. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/AlexanderMattTurner/agent-glovebox/main/.claude/settings.json
Clone the repo
git clone --depth 1 https://github.com/AlexanderMattTurner/agent-glovebox

Made for: Claude Code.

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/alexandermattturner/agent-glovebox/session-start.svg)](https://agentmods.dev/hooks/alexandermattturner/agent-glovebox/session-start)
Your own site
<a href="https://agentmods.dev/hooks/alexandermattturner/agent-glovebox/session-start"><img src="https://agentmods.dev/badge/hooks/alexandermattturner/agent-glovebox/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 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 yesterday.

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

Copies of this mod

4 near-identical copies found in the catalogue:

.claude/settings.json · 32 lines

What it actually says

{
  "SessionStart": [
    {
      "matcher": "",
      "hooks": [
        {
          "type": "command",
          "command": "\"$CLAUDE_PROJECT_DIR\"/.claude/hooks/safe-launch.sh --advisory \"$CLAUDE_PROJECT_DIR\"/.claude/hooks/mcp-tripwire.bundle.mjs"
        }
      ]
    },
    {
      "matcher": "",
      "hooks": [
        {
          "type": "command",
          "command": "\"$CLAUDE_PROJECT_DIR\"/.claude/hooks/session-setup.sh",
          "timeout": 900
        }
      ]
    },
    {
      "matcher": "",
      "hooks": [
        {
          "type": "command",
          "command": "if [ -n \"${WATCHER_EVENT_DIR:-}\" ]; then \"$CLAUDE_PROJECT_DIR\"/.claude/hooks/safe-launch.sh --advisory \"$CLAUDE_PROJECT_DIR\"/.claude/hooks/watcher-forward.mjs SessionStart; fi"
        }
      ]
    }
  ]
}
Same file

What else settings.json configures

This page is one entry in a file that holds 9. 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. yesterday Changed · -4 lines 452c36d4b206
  2. 6d ago First seen · 36 lines scan A 18ad647be2a2

Subscribe to this mod's changes

SessionStart is a hook published in the GitHub repository AlexanderMattTurner/agent-glovebox (59 stars, last pushed today), 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 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Related

Other hooks, from other repositories

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

SessionStart

Runs when a session starts on startup, clear and compact, executing run-hook.cmd. From obra/superpowers.

obra/superpowers · not measured

SessionStart

Runs when a session starts, executing hook-handler.cjs and auto-memory-hook.mjs via node (2 commands). From ruvnet/RuView.

ruvnet/RuView · not measured