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claude-code-orchestra: Hook for Claude Code

.claude/settings.json

PreCompact is a hook for Claude Code from DeL-TaiseiOzaki/claude-code-orchestra. Its token cost is not measured, scanned A, original, MIT.

A hook that runs before the agent's context is automatically shortened. It adds reminders about the project's shared mission, current state, rules, design document, and agent catalog.

In plain words
What is it for?
Use it during automatic context compaction to restore references to the project's instructions, state, rules, and design documents.
Why use it?
It preserves important project guidance when a long conversation must be condensed. This helps the agent continue with the right context.

Hook for Claude Code

Written for Claude Code: PreCompact hook event. Also seen: mentions CLAUDE.md; mentions AGENTS.md.

This is DeL-TaiseiOzaki/claude-code-orchestra's own configuration. It tells Claude Code how to work on claude-code-orchestra itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything claude-code-orchestra configures →

One of 7 entries in settings.json upstream. Installing this one merges just its entry into your config; the other 6 are separate, each on its own page.

not rated 194repo +1 changed 3d ago A scan tokens not measured original MIT
View source ↗ DeL-TaiseiOzaki/claude-code-orchestra
Reuse

Borrowing it

Nothing to install: this file belongs to DeL-TaiseiOzaki/claude-code-orchestra. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/DeL-TaiseiOzaki/claude-code-orchestra/main/.claude/settings.json
Clone the repo
git clone --depth 1 https://github.com/DeL-TaiseiOzaki/claude-code-orchestra

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.

agentmods badge for PreCompact

README.md
[![agentmods](https://agentmods.dev/badge/hooks/del-taiseiozaki/claude-code-orchestra/pre-compact.svg)](https://agentmods.dev/hooks/del-taiseiozaki/claude-code-orchestra/pre-compact)
Your own site
<a href="https://agentmods.dev/hooks/del-taiseiozaki/claude-code-orchestra/pre-compact"><img src="https://agentmods.dev/badge/hooks/del-taiseiozaki/claude-code-orchestra/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. 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

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 3d 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/settings.json · 13 lines

What it actually says

{
  "PreCompact": [
    {
      "matcher": "auto",
      "hooks": [
        {
          "type": "command",
          "command": "echo '{\"hookSpecificOutput\": {\"additionalContext\": \"Context compaction triggered. Key context: CLAUDE.md contains the shared mission, routing, agent and skill catalogs, and quality gates; .claude/STATE.md contains the active main agent and working state; .claude/rules/ contains detailed policy; .claude/docs/DESIGN.md contains project design. AGENTS.md is the CLI-agent contract: cross-CLI invocation and completion guardrails.\"}}'"
        }
      ]
    }
  ]
}
Same file

What else settings.json configures

This page is one entry in a file that holds 7. 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.

  1. 3d ago Changed 5a61cb24762a
  2. 8d ago First seen · 13 lines scan A 58da99e6b62b

Subscribe to this mod's changes

PreCompact is a hook published in the GitHub repository DeL-TaiseiOzaki/claude-code-orchestra (194 stars, last pushed 4d 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.

Related

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SessionStart

Runs when a session starts, executing on-start.js via node. From google-gemini/gemini-cli.

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PreToolUse

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PreToolUse

Runs before the agent uses a tool, executing pre-write.sh and pre-bash.sh (2 commands). From anthropics/claude-cookbooks.

anthropics/claude-cookbooks · not measured

PreCompact

Runs before the context is compacted for manual and auto tool calls, executing hook-handler.cjs via node (4 commands). From ruvnet/RuView.

ruvnet/RuView · not measured