agentmods.dev

SessionStart

A startup hook that runs a dependency-installation script when a session starts, resumes, is cleared, or is compacted.

In plain words
What is it for?
Preparing the project environment at the beginning of a Claude Code session and after session resets or compaction.
Why use it?
It helps ensure required dependencies are installed across these session changes instead of relying on manual setup.

Hook

2 1mo ago A scan tokens not measured original MIT
View the source file Alan-512/ExperienceEngine
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/alan-512/experienceengine/session-start
Clone the repo
git clone --depth 1 https://github.com/Alan-512/ExperienceEngine
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.

hooks/hooks.json · 14 lines

What it actually says

{
  "SessionStart": [
    {
      "matcher": "startup|resume|clear|compact",
      "hooks": [
        {
          "type": "command",
          "command": "${CLAUDE_PLUGIN_ROOT}/scripts/claude-plugin/install-deps.sh",
          "timeout": 60
        }
      ]
    }
  ]
}
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 · 14 lines scan A cc2ec62a9e1a

Subscribe to this mod's changes

SessionStart is a hook published in the GitHub repository Alan-512/ExperienceEngine (2 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.

Memory and contextagent-memoryclaude-codecodexcoding-agentmcpopenclaw
Related

Other hooks, from other repositories

SessionEnd

Runs when a session ends, executing session-end.sh via bash. From zilliztech/memsearch.

zilliztech/memsearch · not measured

Stop

Runs when the agent finishes a response, executing stop.sh via bash. From zilliztech/memsearch.

zilliztech/memsearch · not measured

UserPromptSubmit

Runs when you submit a prompt, before the agent sees it, executing lycheemem_hook.py via python3. From LycheeMem/LycheeMem.

LycheeMem/LycheeMem · not measured

Stop

Runs when the agent finishes a response, executing lycheemem_hook.py via python3. From LycheeMem/LycheeMem.

LycheeMem/LycheeMem · not measured

SessionEnd

Runs when a session ends, executing lycheemem_hook.py via python3. From LycheeMem/LycheeMem.

LycheeMem/LycheeMem · not measured

SessionStart

Runs when a session starts, executing session-start.sh via bash. From zilliztech/memsearch.

zilliztech/memsearch · not measured