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SessionStart

SessionStart is a hook for coding agents from adelaidasofia/vault-sync-mcp. Its token cost is not measured, scanned A, a copy of PreToolUse, MIT.

A session-start hook that runs a Python script when a session begins. The script is called install-ping.py and comes from the vault-sync-mcp project.

In plain words
What is it for?
Running the project's installation-ping step automatically when a session starts.
Why use it?
It provides an automatic action at the beginning of each session. The supplied description does not explain what the script itself changes or reports.

Hook

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 vault-sync-mcp plugin — 1 hook, 2 MCP servers shipped together

not rated 0 12d ago A scan tokens not measured copy · 78% MIT
View the source file adelaidasofia/vault-sync-mcp
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 adelaidasofia/vault-sync-mcp
Claude Code
/plugin install vault-sync-mcp

Or install vault-sync-mcp, the plugin that ships this one along with the rest of its 1 hook, 2 MCP servers.

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/adelaidasofia/vault-sync-mcp/session-start.svg)](https://agentmods.dev/hooks/adelaidasofia/vault-sync-mcp/session-start)
Your own site
<a href="https://agentmods.dev/hooks/adelaidasofia/vault-sync-mcp/session-start"><img src="https://agentmods.dev/badge/hooks/adelaidasofia/vault-sync-mcp/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 78% copy Near-identical to another mod 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 4d 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.

Origin

This is a copy

78% identical to PreToolUse — 26 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

hooks/hooks.json · 12 lines

What it actually says

{
  "SessionStart": [
    {
      "hooks": [
        {
          "type": "command",
          "command": "python3 ${CLAUDE_PLUGIN_ROOT}/hooks/install-ping.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. 4d ago First seen · 12 lines scan A fe6d2b39077b

Subscribe to this mod's changes

SessionStart is a hook published in the GitHub repository adelaidasofia/vault-sync-mcp (0 stars, last pushed 12d 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. It is 78% identical to PreToolUse, differing in 26 lines, and is treated as a copy.

anthropicclaude-codemcpmodel-context-protocolobsidiansync
Related

Other hooks, from other repositories

PreToolUse

Runs before the agent uses a tool for Edit and Write tool calls, executing block-generated-edits.sh. From The-40-Thieves/obsidian-tc.

The-40-Thieves/obsidian-tc · not measured

PostToolUse

Runs after a tool call finishes for Edit and Write tool calls, executing remind-regenerate.sh. From The-40-Thieves/obsidian-tc.

The-40-Thieves/obsidian-tc · not measured

PostToolUse

Runs after a tool call finishes for Write, Edit and MultiEdit tool calls, executing validate-raw-source.sh and qmd-reindex.sh (2 commands). From johnfkoo951/cmds-llm-wiki.

johnfkoo951/cmds-llm-wiki · not measured

SessionStart

Runs when a session starts, running python -m wikimoth.capture.hook SessionStart. From juliangeymonat-jpg/wikimoth.

juliangeymonat-jpg/wikimoth · not measured

SessionStart

Runs when a session starts, executing session-start.sh. From fruggr/zendesk-mcp-server.

fruggr/zendesk-mcp-server · not measured

Stop

Runs when the agent finishes a response, running node. From tractorjuice/arckit-claude.

tractorjuice/arckit-claude · not measured