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SessionStart

SessionStart is a hook for coding agents from AdrianV101/obsidian-pkm-plugin. Its token cost is not measured, scanned A, original, MIT.

A startup hook that runs a JavaScript file when a session starts, is cleared, or is compacted. A hook is an automatic command tied to one of these lifecycle events.

In plain words
What is it for?
Use it to run session-start logic and load information from an Obsidian knowledge-management vault when the required vault path is configured.
Why use it?
It lets session setup happen automatically instead of requiring you to run the same preparation command by hand each time.

Hook

Part of the vault-pkm plugin — 6 skills, 2 commands, 3 agents, 2 hooks shipped together

One of 2 entries in hooks.json — they are configured in one file and arrive together.

not rated 13 1mo ago A scan tokens not measured original MIT
View the source file AdrianV101/obsidian-pkm-plugin
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.

agentmods
npx agentmods add hooks/adrianv101/obsidian-pkm-plugin/session-start
Clone the repo
git clone --depth 1 https://github.com/AdrianV101/obsidian-pkm-plugin

Or install vault-pkm, the plugin that ships this one along with the rest of its 6 skills, 2 commands, 3 agents, 2 hooks.

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/adrianv101/obsidian-pkm-plugin/session-start.svg)](https://agentmods.dev/hooks/adrianv101/obsidian-pkm-plugin/session-start)
Your own site
<a href="https://agentmods.dev/hooks/adrianv101/obsidian-pkm-plugin/session-start"><img src="https://agentmods.dev/badge/hooks/adrianv101/obsidian-pkm-plugin/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 3d 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 · 14 lines

What it actually says

{
  "SessionStart": [
    {
      "matcher": "startup|clear|compact",
      "hooks": [
        {
          "type": "command",
          "command": "VAULT_PATH=${VAULT_PATH} node ${CLAUDE_PLUGIN_ROOT}/hooks/session-start.js",
          "timeout": 15
        }
      ]
    }
  ]
}
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. 3d ago First seen · 14 lines scan A ceb886740221

Subscribe to this mod's changes

SessionStart is a hook published in the GitHub repository AdrianV101/obsidian-pkm-plugin (13 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. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

ai-toolsclaude-codeknowledge-managementmcpmodel-context-protocolobsidian
Related

Other hooks, from other repositories

UserPromptSubmit

Runs when you submit a prompt, before the agent sees it, executing daily-drip.sh via bash. From michaeljauk/brain-starter.

michaeljauk/brain-starter · not measured

SessionStart

Runs when a session starts on startup, resume, clear and compact, executing session-start.ts via node with --disable-warning and --experimental-strip-types. From breferrari/obsidian-mind.

breferrari/obsidian-mind · not measured

Stop

Runs when the agent finishes a response, executing stop-checklist.ts via node with --disable-warning and --experimental-strip-types. From breferrari/obsidian-mind.

breferrari/obsidian-mind · not measured

SessionStart

Runs when a session starts on startup and resume, executing preflight.sh via bash. From os-tack/fcp.

os-tack/fcp · not measured

PostToolUse

Runs after a tool call finishes for Write, Edit and MultiEdit tool calls, executing validate-write.ts via bun. From superuser-pal/awesome-second-brain.

superuser-pal/awesome-second-brain · not measured

SessionStart

Runs when a session starts on startup, resume and clear, executing session-start.sh via bash. From superuser-pal/awesome-second-brain.

superuser-pal/awesome-second-brain · not measured