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SessionStart

SessionStart is a hook for coding agents from odere-pro/claude-calibration. Its token cost is not measured, scanned A, original, MIT.

A session-start hook that runs an installation script when a coding session begins. The script installs bundled workflow files into the project’s .claude/workflows/ folder without overwriting local edits.

In plain words
What is it for?
Use it to install workflow scripts automatically whenever a new session starts.
Why use it?
It makes the bundled workflows available at the start of each session without replacing changes already made in the project.

Hook

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the claude-calibration plugin — 20 skills, 7 agents, 2 hooks shipped together

not rated 1 1mo ago A scan tokens not measured original MIT
View the source file odere-pro/claude-calibration
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add odere-pro/claude-calibration
Claude Code
/plugin install claude-calibration

Or install claude-calibration, the plugin that ships this one along with the rest of its 20 skills, 7 agents, 2 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/odere-pro/claude-calibration/session-start.svg)](https://agentmods.dev/hooks/odere-pro/claude-calibration/session-start)
Your own site
<a href="https://agentmods.dev/hooks/odere-pro/claude-calibration/session-start"><img src="https://agentmods.dev/badge/hooks/odere-pro/claude-calibration/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 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 3d 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.

hooks/hooks.json · 13 lines

What it actually says

{
  "SessionStart": [
    {
      "hooks": [
        {
          "type": "command",
          "command": "${CLAUDE_PLUGIN_ROOT}/hooks/install-workflows.sh",
          "description": "Install bundled Workflow scripts into the project's .claude/workflows/ so they are runnable via /workflows (never overwrites local edits)"
        }
      ]
    }
  ]
}
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. 3d ago First seen · 13 lines scan A d86456e56bbf

Subscribe to this mod's changes

SessionStart is a hook published in the GitHub repository odere-pro/claude-calibration (1 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. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

agentic-aiai-agentsclaude-codeclaude-code-pluginconfigurationdevtools
Related

Other hooks, from other repositories

SessionStart

Runs when a session starts, running an inline shell check. From architonixlabs/RepoOrch.

architonixlabs/RepoOrch · not measured

PreToolUse

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

architonixlabs/RepoOrch · not measured

SessionEnd

Runs when a session ends, running an inline shell check. From atxtechbro/dotfiles.

atxtechbro/dotfiles · not measured

Notification

Runs when the agent sends a notification, running notify-send 'Claude Code' 'Awaiting your input - please chec. From atxtechbro/dotfiles.

atxtechbro/dotfiles · not measured

SessionStart

Runs when a session starts, executing update-check.js via node. From KevinZai/commander.

KevinZai/commander · not measured

Stop

Runs when the agent finishes a response, running python3. From dbc-oduffy/coordinator-claude.

dbc-oduffy/coordinator-claude · not measured