agentmods.dev

SessionStart

SessionStart is a hook for Claude Code from TheBeardedBearSAS/claude-craft. Its token cost is not measured, scanned B, original, MIT.

A hook that runs when a session starts after context compaction. It reads a saved context file or reports that the file is missing.

In plain words
What is it for?
Use it to automatically reload project context at session startup.
Why use it?
It gives the agent a way to recover essential project notes when a new session begins with shortened context.

Hook for Claude Code

Part of the claude-craft plugin — 56 skills, 94 commands, 47 agents, 5 hooks shipped together

One of 6 entries in settings.json — they are configured in one file and arrive together.

not rated 105 2d ago B scan tokens not measured original MIT
View the source file TheBeardedBearSAS/claude-craft
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/thebeardedbearsas/claude-craft/session-start
Clone the repo
git clone --depth 1 https://github.com/TheBeardedBearSAS/claude-craft

Made for: Claude Code.

Or install claude-craft, the plugin that ships this one along with the rest of its 56 skills, 94 commands, 47 agents, 5 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/thebeardedbearsas/claude-craft/session-start.svg)](https://agentmods.dev/hooks/thebeardedbearsas/claude-craft/session-start)
Your own site
<a href="https://agentmods.dev/hooks/thebeardedbearsas/claude-craft/session-start"><img src="https://agentmods.dev/badge/hooks/thebeardedbearsas/claude-craft/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 B 1 finding. Scan, not verified.
Origin original No closer match found in the catalogue.
Security

Grade B, and why

SessionStart scanned grade B 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 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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

"command": "if [ -f .claude/context-essentials.md ]; then cat .claude/context-essentials.md; else echo 'No context-essentials.md found.'; fi"
.claude/settings.json · 13 lines

What it actually says

{
  "SessionStart": [
    {
      "matcher": "compact",
      "hooks": [
        {
          "type": "command",
          "command": "if [ -f .claude/context-essentials.md ]; then cat .claude/context-essentials.md; else echo 'No context-essentials.md found.'; fi"
        }
      ]
    }
  ]
}
Same file

What else settings.json configures

This page is one entry in a file that holds 6. Installing the file brings all of them; each is measured and scanned on its own page.

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 B c98c38184e23

Subscribe to this mod's changes

SessionStart is a hook published in the GitHub repository TheBeardedBearSAS/claude-craft (105 stars, last pushed 2d ago), licensed MIT. Its token cost is not measured: a hook is shell that never enters the context. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

Building agentsMemory and contextagentsai-toolsbmadclaude-codeclean-architectureddd
Related

Other hooks, from other repositories

PreCompact

Runs before the context is compacted, executing compact_90_guard.js via node. From huuanh20/awesome-ai-agent-skills.

huuanh20/awesome-ai-agent-skills · 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, 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