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SessionStart

SessionStart is a hook for Claude Code from zbs-gg/zbs-researcher. Its token cost is not measured, scanned A, original, MIT.

A session-start hook that runs a Python script whenever a coding-agent session begins.

In plain words
What is it for?
It runs the repository’s state-detection script before other session work begins.
Why use it?
It automatically checks the project state at the start of each session.

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 deep-research plugin — 1 skill, 1 hook shipped together

not rated 4repo 21d ago A scan tokens not measured original MIT

Good fit It runs the repository’s state-detection script before other session work begins.

Compare 6 hooks from other repositories ↓
View source ↗ zbs-gg/zbs-researcher
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 zbs-gg/zbs-researcher
Claude Code
/plugin install deep-research

Made for: Claude Code.

Or install deep-research, the plugin that ships this one along with the rest of its 1 skill, 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/zbs-gg/zbs-researcher/session-start.svg)](https://agentmods.dev/hooks/zbs-gg/zbs-researcher/session-start)
Your own site
<a href="https://agentmods.dev/hooks/zbs-gg/zbs-researcher/session-start"><img src="https://agentmods.dev/badge/hooks/zbs-gg/zbs-researcher/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 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 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.

hooks/hooks.json · 12 lines

What it actually says

{
  "SessionStart": [
    {
      "hooks": [
        {
          "type": "command",
          "command": "python3 \"${CLAUDE_PLUGIN_ROOT}/skills/deep-research/scripts/detect_state.py\""
        }
      ]
    }
  ]
}
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 · 12 lines scan A 9cc634cf2582

Subscribe to this mod's changes

SessionStart is a hook published in the GitHub repository zbs-gg/zbs-researcher (4 stars, last pushed 21d 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 2026-08-31.

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