SessionEnd

A session-ending hook that runs a command when an agent session finishes. The command asks Katra to save a snapshot marked as a session-end event.

In plain words
What is it for?
Use it to trigger Katra's session-end snapshot command whenever an agent session closes.
Why use it?
It records the session's ending state automatically instead of relying on a separate manual step.

Hook for Claude Code

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/craigjmidwinter/getvect/session-end
Clone the repo
git clone --depth 1 https://github.com/craigjmidwinter/getvect

Made for: Claude Code.

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

SessionEnd 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:

.claude/settings.json · 13 lines

What it actually says

{
  "SessionEnd": [
    {
      "hooks": [
        {
          "async": true,
          "command": "katra agent-hook snapshot --event session-end",
          "type": "command"
        }
      ]
    }
  ]
}
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 · 13 lines scan A 2ebabcf1f9fa

Subscribe to this mod's changes

SessionEnd is a hook published in the GitHub repository craigjmidwinter/getvect (89 stars, last pushed 5d 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.