What is SessionStart?

A session-start hook that runs a Node.js script when a new session begins. A hook is an automatic action triggered by an event.

Use it to trigger the listed Node.js session-start routine automatically when a session begins.

It removes the need to start that script manually whenever a session opens. The provided configuration shows only that the session-start command is run.

SessionStart — Hook by illodev

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/illodev/workfile/session-start

Clone the repo

git clone --depth 1 https://github.com/illodev/workfile

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 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

Copies of this mod

1 near-identical copy found in the catalogue:

PostToolUse — 86% identical, 5 lines differ

.claude/settings.json · 13 lines

What it actually says

{
  "SessionStart": [
    {
      "matcher": "*",
      "hooks": [
        {
          "type": "command",
          "command": "node node_modules/@illodev/workfile/dist/src/runtime/claude/hooks.mjs session-start"
        }
      ]
    }
  ]
}

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.

yesterday First seen · 13 lines scan A a03c75537ef7

Subscribe to this mod's changes

SessionStart is a hook published in the GitHub repository illodev/workfile (2 stars, last pushed 5d 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.

Git and workflow Project management Writing and docs agents ai-agents backlog changelog cli developer-tools

PostToolUse

Runs after a tool call finishes for task_claim, mcp__.*__task_claim, task_deliver, mcp__.*__task_deliver, task_release, mcp__.*__task_release, task_deliver and mcp__.*__task_deliver tool calls, executing claim-guard.mjs and post-deliver.mjs via node (2 commands). From ustoppble/overclick.

ustoppble/overclick · not measured

SessionStart

Getting it into your agent

Grade A, and why

Nothing flagged

Copies of this mod

What it actually says

What this file has done since we first saw it

Other hooks, from other repositories

PostToolUse

Stop

SessionStart

SessionEnd

SessionStart

PostCompact