What is SessionStart?

A session-start hook that runs a configured shell command when an agent session begins. A hook is an automatic action tied to a specific event.

Use it for an automatic start-of-session check configured through the plugin.

It can perform an initial check or setup automatically instead of relying on a manual command. The provided command calls an Infinity Context plugin script.

SessionStart — Hook by 777genius

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/777genius/infinity-context/session-start

Clone the repo

git clone --depth 1 https://github.com/777genius/infinity-context

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

3 near-identical copies found in the catalogue:

BeforeAgent — 92% identical, 4 lines differ
SessionEnd — 89% identical, 4 lines differ
AfterAgent — 81% identical, 4 lines differ

plugins/infinity-context-agent-plugin-gemini-hooks/hooks/hooks.json · 13 lines

What it actually says

{
  "SessionStart": [
    {
      "matcher": "*",
      "hooks": [
        {
          "type": "command",
          "command": "${extensionPath}${/}bin${/}infinity-context-plugin-hook GeminiSessionStart"
        }
      ]
    }
  ]
}

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 e26773164cce

Subscribe to this mod's changes

SessionStart is a hook published in the GitHub repository 777genius/infinity-context (7 stars, last pushed 4d ago), licensed Apache-2.0. 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.

Data and AI Memory and context agent-memory ai ai-agents coding-agents context-engineering graphiti

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

SessionStart

PostToolUse

PreCompact

PostCompact

Stop

PreCompact