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PreCompact

PreCompact is a hook for Claude Code from Akram012388/cc-dm. Its token cost is not measured, scanned A, original, MIT.

A pre-compaction hook that prints a reminder before the agent's conversation context is shortened. Context compaction is the process of compressing earlier messages to make room for new work.

In plain words
What is it for?
It reminds the agent to use the session ID with the cc-dm who tool and recover its registered name, role, and project without registering again.
Why use it?
It helps preserve a note about session identity and tells the agent how to recover it after compaction.

Hook for Claude Code

Part of the cc-dm plugin — 3 skills, 1 hook shipped together

not rated 22 5mo ago A scan tokens not measured original MIT
View the source file Akram012388/cc-dm
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/akram012388/cc-dm/pre-compact
Clone the repo
git clone --depth 1 https://github.com/Akram012388/cc-dm

Made for: Claude Code.

Or install cc-dm, the plugin that ships this one along with the rest of its 3 skills, 1 hook.

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.

agentmods badge for PreCompact

README.md
[![agentmods](https://agentmods.dev/badge/hooks/akram012388/cc-dm/pre-compact.svg)](https://agentmods.dev/hooks/akram012388/cc-dm/pre-compact)
Your own site
<a href="https://agentmods.dev/hooks/akram012388/cc-dm/pre-compact"><img src="https://agentmods.dev/badge/hooks/akram012388/cc-dm/pre-compact.svg" alt="Measured on agentmods" 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. Scan, not verified.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

PreCompact 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 4d 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.

.claude-plugin/hooks/hooks.json · 13 lines

What it actually says

{
  "PreCompact": [
    {
      "matcher": "*",
      "hooks": [
        {
          "type": "command",
          "command": "echo 'IMPORTANT cc-dm state: This session may have a cc-dm identity registered in the database. The session ID in the MCP server instructions above is authoritative. On your next cc-dm interaction, call the who tool to match your session ID against active sessions and recover your display name, role, and project. Do NOT re-register — your registration persists in the database.'"
        }
      ]
    }
  ]
}
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. 4d ago First seen · 13 lines scan A a63d7f212156

Subscribe to this mod's changes

PreCompact is a hook published in the GitHub repository Akram012388/cc-dm (22 stars, last pushed 5mo 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.

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