agentmods.dev

SessionStart

A session-start hook that runs verify.mjs and adds the project's delivery rules to the agent's context. A hook is an automatic command triggered by a particular event.

In plain words
What is it for?
It is for checking the project when a session opens and supplying startup instructions about specifications, verification receipts, approvals, and app inspection.
Why use it?
It reminds the agent what counts as finished and which inspection tools are expected before work begins, reducing skipped verification steps.

Hook for Claude Code

0 4d ago A scan tokens not measured original MIT
View the source file kvdm-co-pilot/create-cmp
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/kvdm-co-pilot/create-cmp/session-start
Clone the repo
git clone --depth 1 https://github.com/kvdm-co-pilot/create-cmp

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 0 findings. Scan, not verified.
Origin original No closer match found 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 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.

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.

template/.claude/settings.json · 13 lines

What it actually says

{
  "SessionStart": [
    {
      "matcher": "",
      "hooks": [
        {
          "type": "command",
          "command": "printf '%s' '{\"hookSpecificOutput\":{\"hookEventName\":\"SessionStart\",\"additionalContext\":\"This app is governed by its delivery contract (CLAUDE.md): behavior starts in specs/, done is `node qa/verify.mjs` with a committed receipt, approvals gate signed artifacts. The cmp-inspector MCP tools (preview loop, live tier) are the expected eyes — if they are absent from this session, that is a fault to diagnose (plugin disabled, session predates plugin enablement, or stale plugin copy; see cmp-doctor), not a cue to fall back to screenshots or blind adb.\"}}'"
        }
      ]
    }
  ]
}
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 f9efa399d03a

Subscribe to this mod's changes

SessionStart is a hook published in the GitHub repository kvdm-co-pilot/create-cmp (0 stars, last pushed 4d 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. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

androidclaude-codeclicompose-multiplatformioskmp
Related

Other hooks, from other repositories

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Stop

Runs when the agent finishes a response, executing docs-aitells-gate.sh via bash. From jo-duchan/tapflow.

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PostToolUse

Runs after a tool call finishes for Edit and Write tool calls, executing post-edit-analyze.sh. From K9i-0/ccpocket.

K9i-0/ccpocket · not measured

PreToolUse

Runs before the agent uses a tool for Bash tool calls, executing pr-merge-guard.sh, gh-language-gate.sh, adversarial-review-gate.sh and issue-parent-gate.sh via bash (4 commands). From jo-duchan/tapflow.

jo-duchan/tapflow · not measured

PostToolUse

Runs after a tool call finishes for Edit, Write and MultiEdit tool calls, executing docs-aitells-reminder.sh via bash. From jo-duchan/tapflow.

jo-duchan/tapflow · not measured

SessionStart

Runs when a session starts, executing session-start.sh. From yschimke/compose-ai-tools.

yschimke/compose-ai-tools · not measured