agentmods.dev

SessionStart

A session-start hook that runs a shell script when a coding-agent session begins. A hook is an automatic action tied to an event.

In plain words
What is it for?
Use it to run the plugin's session-start.sh script automatically when a session opens.
Why use it?
It automates work that should happen at the start of every session, so the user does not have to run the script manually.

Hook

5 1mo ago A scan tokens not measured copy · 52% MIT
View the source file localplugins/plugins
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/localplugins/plugins/session-start
Clone the repo
git clone --depth 1 https://github.com/localplugins/plugins
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 52% 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 yesterday.

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

52% identical to SessionStart — 4 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.

brand-forge/hooks/hooks.json · 13 lines

What it actually says

{
  "SessionStart": [
    {
      "hooks": [
        {
          "type": "command",
          "command": "bash \"${CLAUDE_PLUGIN_ROOT}/hooks/session-start.sh\"",
          "async": false
        }
      ]
    }
  ]
}
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. yesterday First seen · 13 lines scan A 203d0135329a

Subscribe to this mod's changes

SessionStart is a hook published in the GitHub repository localplugins/plugins (5 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. It is 52% identical to SessionStart, differing in 4 lines, and is treated as a copy.

Writing and docsbrandingclaude-codeclaude-code-marketplaceclaude-code-pluginscontent-generationdeveloper-tools
Related

Other hooks, from other repositories

PostToolUse

Runs after a tool call finishes for Write and Edit tool calls, executing format-csharp.sh via bash. From NikiforovAll/claude-code-rules.

NikiforovAll/claude-code-rules · not measured

SessionStart

Runs when a session starts, executing setup-cc-meta.sh via bash. From qte77/claude-code-plugins.

qte77/claude-code-plugins · not measured

PostToolUse

Runs after a tool call finishes for Write, Edit and Skill tool calls, executing ontology_sync.js and ontology_track_skill.js via node (2 commands). From baodq97/open-plugin.

baodq97/open-plugin · not measured

PostToolUse

Runs after a tool call finishes for mcp__demo-playwright__browser_stop_video, mcp__demo-elevenlabs__text_to_speech, Write and Edit tool calls, executing postprocess-clip.mjs, probe-audio.mjs and validate-artifacts.mjs via node (3 commands). From lukaskellerstein/claude-my-marketplace.

lukaskellerstein/claude-my-marketplace · not measured

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 on startup, executing install_pkgs.sh. From supabase/supabase.

supabase/supabase · not measured