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SessionStart

SessionStart is a hook for Claude Code from Spark-To-Paper-Skills/paper-wiki. Its token cost is not measured, scanned A, a copy of SessionStart, MIT.

A session-start hook that runs an update-check script when a Claude Code session begins. A hook is an automatic action triggered by a tool or event.

In plain words
What is it for?
Use it to run the Paper Wiki plug-in's update check automatically when a session opens.
Why use it?
It checks for updates without requiring a separate manual command 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 paper-wiki plugin — 1 skill, 8 commands, 4 agents, 1 hook shipped together

not rated 7repo +1 27d ago A scan tokens not measured copy · 61% MIT

Good fit Use it to run the Paper Wiki plug-in's update check automatically when a session opens.

Compare 6 hooks from other repositories ↓
View source ↗ Spark-To-Paper-Skills/paper-wiki spark-to-paper-skills.github.io
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 Spark-To-Paper-Skills/paper-wiki
Claude Code
/plugin install paper-wiki

Made for: Claude Code.

Or install paper-wiki, the plugin that ships this one along with the rest of its 1 skill, 8 commands, 4 agents, 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/spark-to-paper-skills/paper-wiki/session-start/github.svg)](https://agentmods.dev/hooks/spark-to-paper-skills/paper-wiki/session-start)
Your own site
<a href="https://agentmods.dev/hooks/spark-to-paper-skills/paper-wiki/session-start"><img src="https://agentmods.dev/badge/hooks/spark-to-paper-skills/paper-wiki/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/spark-to-paper-skills/paper-wiki/session-start"><img src="https://agentmods.dev/badge/hooks/spark-to-paper-skills/paper-wiki/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 61% 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 10d 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

61% identical to SessionStart — 5 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": "node \"$CLAUDE_PLUGIN_ROOT/hooks/check-update.js\""
        }
      ]
    }
  ]
}
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. 10d ago First seen · 12 lines scan A d0adc3a91d71

Subscribe to this mod's changes

SessionStart is a hook published in the GitHub repository Spark-To-Paper-Skills/paper-wiki (7 stars, last pushed 27d 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 61% identical to SessionStart, differing in 5 lines, and is treated as a copy.

Claude CodeLLMknowledge-basemineruocrresearch-tools
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PreCompact

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SubagentStop

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PostToolUse

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