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SessionStart

SessionStart is a hook for Claude Code from Agenxy/dibs. Its token cost is not measured, scanned A, original, GPL-3.0.

A session-start hook that runs two shell commands when a coding-agent session begins. The commands check and report to Dibs, an external service or tool named in the configuration.

In plain words
What is it for?
Use it to poll Dibs and report the new session when work begins. The hook only prints output that looks like a JSON object and exits successfully otherwise.
Why use it?
It performs the Dibs checks automatically instead of requiring the developer to run them manually at the start of each session.

Hook for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the dibs plugin — 1 skill, 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.

not rated 2repo today A scan tokens not measured original GPL-3.0

Good fit Use it to poll Dibs and report the new session when work begins. The hook only prints output that looks like a JSON object and exits successfully otherwise.

Compare 6 hooks from other repositories ↓
Install with agentmods
npx agentmods add hooks/agenxy/dibs/session-start
View source ↗ Agenxy/dibs agenxy.org
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/Agenxy/dibs

Made for: Claude Code.

Or install dibs, the plugin that ships this one along with the rest of its 1 skill, 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/agenxy/dibs/session-start/github.svg)](https://agentmods.dev/hooks/agenxy/dibs/session-start)
Your own site
<a href="https://agentmods.dev/hooks/agenxy/dibs/session-start"><img src="https://agentmods.dev/badge/hooks/agenxy/dibs/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/agenxy/dibs/session-start"><img src="https://agentmods.dev/badge/hooks/agenxy/dibs/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 20d 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.

internal/plugins/data/claude-code/hooks/hooks.json · 24 lines

The source is not reproduced here

Licensed GPL-3.0

The repository is licensed GPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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. 20d ago First seen · 24 lines scan A fbf2dca1060e

Subscribe to this mod's changes

SessionStart is a hook published in the GitHub repository Agenxy/dibs (2 stars, last pushed today), licensed GPL-3.0. 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 2026-09-26.

Building agentsGoMulti-AgentProductivityai-agentscoordinationmcpmodel-context-protocol
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