What is SessionStart?

An automatic action that runs when an agent session starts or resumes. It runs a session-start Python script.

Use it to run initialization work when a new session opens or an existing session resumes.

It ensures the session-start setup happens consistently without a manual command.

SessionStart — Hook for Claude Code by moorcheh-ai/memanto

About the project

Memanto is a companion memory agent that manages what other AI agents remember, including durable facts, preferences, conflicts, stale information, and which agents should receive updates. It is for teams running multiple agents that need coordinated memory across conversations, platforms, and storage systems.

moorcheh-ai/memanto · 2,357 stars · on GitHub · memanto.ai

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.

Clone the repo

git clone --depth 1 https://github.com/moorcheh-ai/memanto

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/hooks/moorcheh-ai/memanto/session-start/github.svg)](https://agentmods.dev/hooks/moorcheh-ai/memanto/session-start)

Your own site

<a href="https://agentmods.dev/hooks/moorcheh-ai/memanto/session-start"><img src="https://agentmods.dev/badge/hooks/moorcheh-ai/memanto/session-start/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/hooks/moorcheh-ai/memanto/session-start"><img src="https://agentmods.dev/badge/hooks/moorcheh-ai/memanto/session-start.svg" alt="Reviewed on agentmods" width="80" 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. A grade says what 26 rules found in the file — not that it is safe.

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 1mo 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

2 near-identical copies found in the catalogue:

SessionStart — 86% identical, 10 lines differ
SessionStart — 86% identical, 35 lines differ

memanto/cli/connect/assets/hooks/hooks.json · 18 lines

What it actually says

{
  "SessionStart": [
    {
      "matcher": "startup|resume",
      "hooks": [
        {
          "_managed_by": "memanto",
          "type": "command",
          "command": "${SYS_EXECUTABLE}",
          "args": [
            "${HOOKS_DIR}/session_start.py"
          ],
          "timeout": 30
        }
      ]
    }
  ]
}

Same file

What else `hooks.json` configures

This page is one entry in a file that holds 3. 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.

1mo ago Changed · -1 lines b6a5456e4d12
2mo ago First seen · 19 lines scan A dc9bcbc28b2f

Subscribe to this mod's changes

SessionStart is a hook published in the GitHub repository moorcheh-ai/memanto (2,357 stars, last pushed yesterday), 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 2026-09-05.

Building agents Memory and context agent-memory ai-agents long-term-memory memanto moorcheh

SessionStart next to 6 hooks from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
SessionStartmoorcheh-ai/memanto	Hook	2.4k	yesterday	MIT	A	—	Claude Code
UserPromptSubmitkitfunso/hippo-memory	Hook	790	yesterday	MIT	A	—	Claude Code
PreCompactkitfunso/hippo-memory	Hook	790	yesterday	MIT	A	—	Claude Code
PostCompactkitfunso/hippo-memory	Hook	790	yesterday	MIT	A	—	Claude Code
PostToolUseanthony-maio/mnemos	Hook	28	9d ago	MIT	A	—	Claude Code
PreCompactnowledge-co/community	Hook	201	today	none	A	—	Claude Code
SessionEndnowledge-co/community	Hook	201	today	none	A	—	Claude Code

SessionStart