agentmods.dev

SessionStart

SessionStart is a hook for coding agents from pvillega/claude-templates. Its token cost is not measured, scanned B, original, no licence file.

A session-start hook that runs setup and checking scripts when a coding session starts or is restored.

In plain words
What is it for?
It helps run session-start, post-compaction, and lint-detection scripts during startup, reset, or restored sessions.
Why use it?
It automates repeated startup work instead of relying on the developer to run several commands manually.

Hook

Part of the ct plugin — 38 skills, 7 agents, 7 hooks shipped together

One of 7 entries in hooks.json — they are configured in one file and arrive together.

not rated 23 1mo ago B scan tokens not measured no licence
View the source file pvillega/claude-templates
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/pvillega/claude-templates/session-start
Clone the repo
git clone --depth 1 https://github.com/pvillega/claude-templates

Or install ct, the plugin that ships this one along with the rest of its 38 skills, 7 agents, 7 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/pvillega/claude-templates/session-start.svg)](https://agentmods.dev/hooks/pvillega/claude-templates/session-start)
Your own site
<a href="https://agentmods.dev/hooks/pvillega/claude-templates/session-start"><img src="https://agentmods.dev/badge/hooks/pvillega/claude-templates/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 B 1 finding. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Security

Grade B, and why

SessionStart scanned grade B with 1 finding 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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

"command": "[ -f \"$HOME/.claude/shell-aliases.txt\" ] && echo '## Active Shell Aliases' && cat \"$HOME/.claude/shell-aliases.txt\"",
plugins/ct/hooks/hooks.json · 57 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Same file

What else hooks.json configures

This page is one entry in a file that holds 7. 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. 4d ago First seen · 57 lines scan B d7ea2a394c79

Subscribe to this mod's changes

SessionStart is a hook published in the GitHub repository pvillega/claude-templates (23 stars, last pushed 1mo ago), with no licence file. Its token cost is not measured: a hook is shell that never enters the context. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Code review
Related

Other hooks, from other repositories

PostToolUse

Runs after a tool call finishes for Write and Edit tool calls, executing format_and_lint.sh. From supabase/supabase.

supabase/supabase · not measured

SessionStart

Runs when a session starts, executing on-start.js via node. From google-gemini/gemini-cli.

google-gemini/gemini-cli · not measured

SessionStart

Runs when a session starts on startup, executing install_pkgs.sh. From supabase/supabase.

supabase/supabase · not measured

PreToolUse

Runs before the agent uses a tool for Bash tool calls, running an inline shell check. From apache/superset.

apache/superset · not measured

PreToolUse

Runs before the agent uses a tool, executing pre-write.sh and pre-bash.sh (2 commands). From anthropics/claude-cookbooks.

anthropics/claude-cookbooks · not measured

SessionStart

Runs when a session starts, executing session-start.sh. From anthropics/claude-cookbooks.

anthropics/claude-cookbooks · not measured