agentmods.dev

SessionStart

A startup hook that runs two shell scripts when a coding session starts, is cleared, or is compacted.

In plain words
What is it for?
Showing a session banner and refreshing stored memory during session startup or reset events.
Why use it?
It automatically refreshes session information at these points, so you do not have to run those scripts yourself.

Hook

35 2d ago A scan tokens not measured original MIT
View the source file procoders/superpowers-v
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/procoders/superpowers-v/session-start
Clone the repo
git clone --depth 1 https://github.com/procoders/superpowers-v
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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

hooks/hooks.json · 19 lines

What it actually says

{
  "SessionStart": [
    {
      "matcher": "startup|clear|compact",
      "hooks": [
        {
          "type": "command",
          "command": "\"${CLAUDE_PLUGIN_ROOT}/hooks/session-banner.sh\"",
          "async": false
        },
        {
          "type": "command",
          "command": "\"${CLAUDE_PLUGIN_ROOT}/hooks/memory-refresh.sh\"",
          "async": false
        }
      ]
    }
  ]
}
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 · 19 lines scan A 66f77504216c

Subscribe to this mod's changes

SessionStart is a hook published in the GitHub repository procoders/superpowers-v (35 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 A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Memory and contextclaude-codeclaude-code-plugincode-archaeologyopusparallel-agentssuperpowers
Related

Other hooks, from other repositories

PreToolUse

Runs before the agent uses a tool for Agent and Task tool calls, executing pre_tool_use.py via python3. From tzachbon/claude-model-router-hook.

tzachbon/claude-model-router-hook · not measured

PostToolUse

Runs after a tool call finishes for Agent and Task tool calls, executing post_tool_use.py via python3. From tzachbon/claude-model-router-hook.

tzachbon/claude-model-router-hook · not measured

UserPromptSubmit

Runs when you submit a prompt, before the agent sees it, executing run-hook.cmd. From Redtropig/harness-anchor.

Redtropig/harness-anchor · not measured

PostToolUse

Runs after a tool call finishes for Edit, Write and MultiEdit tool calls, executing dev-check.sh. From 7xuanlu/ultrapowers.

7xuanlu/ultrapowers · not measured

UserPromptSubmit

Runs when you submit a prompt, before the agent sees it, executing user_prompt_submit.py via python3. From tzachbon/claude-model-router-hook.

tzachbon/claude-model-router-hook · not measured

SessionStart

Runs when a session starts on startup, resume, clear and compact, executing run-hook.cmd. From DollarDill/beads-superpowers.

DollarDill/beads-superpowers · not measured