agent-chorus: Instructions file for Claude Code

GEMINI.md

agent-chorus GEMINI.md is an instructions file for Claude Code, Gemini CLI from cote-star/agent-chorus. It costs 1,429 tokens per session, scanned A, original, MIT.

A set of instructions for coordinating work between coding agents through a shared context pack and agent-activity information.

In plain words
What is it for?
Reading the required context files, routing repository tasks, refreshing stale context, and checking what another agent is doing.
Why use it?
It prevents agents from starting with incomplete repository context or duplicating work already handled by another agent.

Instructions file for Claude CodeGemini CLI

Written for Claude Code and Gemini CLI: SessionEnd hook event, but also the file is GEMINI.md. Also seen: mentions Claude Code; mentions Codex; mentions Gemini CLI.

This is cote-star/agent-chorus's own configuration. It tells Claude Code and Gemini CLI how to work on agent-chorus 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 agent-chorus configures →

Reuse

Borrowing it

Nothing to install: this file belongs to cote-star/agent-chorus. 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/cote-star/agent-chorus/main/GEMINI.md
Clone the repo
git clone --depth 1 https://github.com/cote-star/agent-chorus

Made for: Claude Code, Gemini CLI.

Wrote this? Show the measurements

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README.md
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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.

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<a href="https://agentmods.dev/instructions/cote-star/agent-chorus/gemini-md"><img src="https://agentmods.dev/badge/instructions/cote-star/agent-chorus/gemini-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 1,429 This file is loaded in full into every session.
When invoked 1,429 The same file — it is already loaded in full.
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.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.01429 $0.01429
Opus 5.5 $0.00572 $0.00572
Sonnet 5.5 $0.00286 $0.00286
Haiku 4.5 $0.00143 $0.00143

Measured 1mo ago against content hash 0890f78a4c43, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

agent-chorus GEMINI.md 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 body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

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.

GEMINI.md · 147 lines

How it starts

The opening of the file, as written. The whole thing — 147 lines — stays where its author put it; the contents beside it link to each section on GitHub.

BEFORE starting any task, read these 3 files in order:

  1. .agent-context/current/00_START_HERE.md
  2. .agent-context/current/30_BEHAVIORAL_INVARIANTS.md
  3. .agent-context/current/20_CODE_MAP.md Do NOT open repo source files until steps 1-3 are complete. Then open only files .agent-context identifies as relevant to your task.

Context Pack

When asked to understand this repository:

  1. Read .agent-context/current/00_START_HERE.md first.
  2. Follow the read order defined in that file.
  3. Use the structured files if present for task routing, grouped reporting, and stop conditions.
  4. Only open project files when the context pack identifies a specific target.

Gemini Instructions For This Repo

Naming convention: Use chorus agent-context ... commands. Legacy npm wrappers (npm run agent-context:*) are still available in this repo.

If Context Pack Is Missing or Stale

chorus agent-context init
# ...fill template sections...
chorus agent-context seal

Agent Chorus Integration

This project is wired for cross-agent coordination via chorus. Provider snippet: .agent-chorus/providers/gemini.md.

When a user asks about another agent's activity ("What is Claude doing?", "Compare Codex and Gemini outputs"), run Chorus commands first and answer with evidence from session output rather than reasoning.

Available Commands

chorus read --agent <agent> [--id=<id>] [--cwd=<path>] [--chats-dir=<path>] [--last=<N>] [--json] [--include-user] [--tool-calls] [--format=<json|markdown>] [--metadata-only] [--audit-redactions]
chorus summary --agent <agent> [--cwd=<path>] [--format=<json|markdown>] [--json]
chorus timeline [--agent <agent>]... [--cwd=<path>] [--limit=<N>] [--format=<json|markdown>] [--json]
chorus list --agent <agent> [--cwd=<path>] [--limit=<N>] [--json]
chorus search <query> --agent <agent> [--cwd=<path>] [--json]
chorus compare --source <agent[:id]>... [--cwd=<path>] [--json]
chorus diff --agent <agent> --from <id1> --to <id2> [--cwd=<path>] [--json]
chorus send --from <agent> --to <agent> --message <text> [--cwd=<path>]
chorus messages --agent <agent> [--cwd=<path>] [--clear] [--json]
chorus checkpoint --from <agent> [--cwd=<path>] [--message=<text>] [--json]

Read the full file on GitHub · 147 lines

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. 1mo ago First seen · 147 lines · 1,429 tokens per session scan A 0890f78a4c43

Subscribe to this mod's changes

agent-chorus GEMINI.md is an instructions file published in the GitHub repository cote-star/agent-chorus (15 stars, last pushed 22d ago), licensed MIT. It adds 1,429 tokens to every session, about $0.0057 per session on Opus 5.5. 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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