claudesidian: Hook for Claude Code

.claude/settings.json

SessionStart is a hook for Claude Code from heyitsnoah/claudesidian. Its token cost is not measured, scanned A, original, MIT.

A session-start hook configuration that runs two shell checks when a session begins. A hook is an automatic action triggered by an event.

In plain words
What is it for?
Use it to welcome users setting up a Claudesidian vault and run its update check at session start.
Why use it?
It can show first-run setup instructions and check for updates without requiring a manual command.

Hook for Claude Code

Written for Claude Code: SessionStart hook event.

This is heyitsnoah/claudesidian's own configuration. It tells Claude Code how to work on claudesidian 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 claudesidian configures →

One of 3 entries in settings.json upstream. Installing this one merges just its entry into your config; the other 2 are separate, each on its own page.

About the project

Claudesidian is a preconfigured Obsidian vault structure that lets Claude Code help manage a personal knowledge base as a thinking partner. It is for people who organize notes and other knowledge in Obsidian, with Git-based version control and optional integrations for image analysis and web research. The catalogue add-ons provide Claude Code skills, agents, hooks, and settings for working with this vault.

heyitsnoah/claudesidian · 2,598 stars · on GitHub

Reuse

Borrowing it

Nothing to install: this file belongs to heyitsnoah/claudesidian. 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/heyitsnoah/claudesidian/main/.claude/settings.json
Clone the repo
git clone --depth 1 https://github.com/heyitsnoah/claudesidian

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/heyitsnoah/claudesidian/session-start/github.svg)](https://agentmods.dev/hooks/heyitsnoah/claudesidian/session-start)
Your own site
<a href="https://agentmods.dev/hooks/heyitsnoah/claudesidian/session-start"><img src="https://agentmods.dev/badge/hooks/heyitsnoah/claudesidian/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/heyitsnoah/claudesidian/session-start"><img src="https://agentmods.dev/badge/hooks/heyitsnoah/claudesidian/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 1mo 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.

.claude/settings.json · 16 lines

What it actually says

{
  "SessionStart": [
    {
      "hooks": [
        {
          "type": "command",
          "command": "[ -f FIRST_RUN ] && echo '{\"hookSpecificOutput\":{\"hookEventName\":\"SessionStart\",\"additionalContext\":\"\\n\\n# 🚀 Welcome to Claudesidian!\\n\\n**This appears to be your first time using this vault.**\\n\\n## Quick Start\\n\\nRun the setup wizard:\\n\\n⬇\\n/init-bootstrap\\n⬆\\n\\n## What this will do:\\n\\n✅ Set up your personalized configuration\\n✅ Disconnect from the original repository\\n✅ Help you import any existing Obsidian vault\\n✅ Configure your preferred workflow\\n✅ Create your PARA folder structure\\n\\nThe setup wizard will guide you through everything!\\n\\n\"}}' || true"
        },
        {
          "type": "command",
          "command": "npm run check-updates --silent 2>/dev/null || true"
        }
      ]
    }
  ]
}
Same file

What else settings.json configures

This page is one entry in a file that holds 3. 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. 1mo ago First seen · 16 lines scan A 439f8b763225

Subscribe to this mod's changes

SessionStart is a hook published in the GitHub repository heyitsnoah/claudesidian (2,598 stars, last pushed 6mo 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 2026-08-30.