agentmods.dev

SessionStart

A startup hook that runs a Node.js update script when a coding session starts, resumes, or is cleared.

In plain words
What is it for?
Use it to trigger wf-auto-update-prompt.mjs during session startup, resume, and reset events.
Why use it?
It automates a session-start update so the workflow does not depend on someone running the script manually.

Hook for Claude Code

5 1mo ago A scan tokens not measured no licence
View the source file zingspark/create-harness-vibe-coding
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/zingspark/create-harness-vibe-coding/session-start
Clone the repo
git clone --depth 1 https://github.com/zingspark/create-harness-vibe-coding

Made for: Claude Code.

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 1 finding. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Security

Grade A, and why

SessionStart scanned grade A 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 2d 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.

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

"command": "node -e \"const fs=require('fs'),p=require('path'),cp=require('child_process');let d=process.env.CLAUDE_PROJECT_DIR||process.cwd();for(;;){const s=p.join(d,'Harness','scripts','wf-auto-update-prompt.mjs');if(
.claude/settings.json · 13 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

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. 2d ago First seen · 13 lines scan A 6be6084f2c9f

Subscribe to this mod's changes

SessionStart is a hook published in the GitHub repository zingspark/create-harness-vibe-coding (5 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 A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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