gantry: Instructions file for Codex

AGENTS.md

gantry AGENTS.md is an instructions file for Codex, OpenCode from geleynse/gantry. It costs 1,724 tokens per session, scanned A, original, MIT.

Repository-specific instructions for working on Gantry, a codebase containing an MCP proxy, REST API, database services, and a React dashboard. They describe its layout, commands, and test expectations.

In plain words
What is it for?
Use them when installing dependencies, building Gantry, running the server, exploring its folders, or running isolated tests.
Why use it?
They give a coding agent the project context needed to make changes and run the repository’s checks correctly.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions Codex.

This is geleynse/gantry's own configuration. It tells Codex and OpenCode how to work on gantry 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 gantry configures →

Reuse

Borrowing it

Nothing to install: this file belongs to geleynse/gantry. 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/geleynse/gantry/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/geleynse/gantry

Made for: Codex, OpenCode.

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.

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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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Per session 1,724 This file is loaded in full into every session.
When invoked 1,724 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 $0.01724 $0.01724
Opus 5.5 $0.00690 $0.00690
Sonnet 5.5 $0.00345 $0.00345
Haiku 4.5 $0.00172 $0.00172

Measured 2mo ago against content hash 19addd6a4aa5, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

gantry AGENTS.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 2mo 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.

AGENTS.md · 132 lines

How it starts

The opening of the file, as written. The whole thing — 132 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Gantry — Agent Instructions

MCP proxy and live dashboard for Space Molt AI fleets. This file provides context for AI coding assistants working on this codebase.

Quick Reference

bun install                         # install dependencies (root, workspaces)
bun run build                       # build server + dashboard (works from root)
bun run --cwd server dev            # dev mode with hot reload (server-only script)
bun run --cwd server test:isolated  # full suite, one process per file (what CI gates on)
bun test <file>                     # single file — a full `bun test` false-reds ~60% of the time

Dashboard at http://localhost:3100.

Repository Structure

gantry/
├── server/              # Express server (MCP proxy + REST API + dashboard)
│   ├── src/
│   │   ├── proxy/       # MCP proxy modules (compound tools, pipeline, guardrails)
│   │   ├── routines/    # 18 multi-step game routines
│   │   ├── web/         # Express routes, auth adapters, middleware
│   │   ├── services/    # Database, notes, comms, analytics
│   │   ├── app/         # React 19 + Next.js 15 frontend
│   │   ├── components/  # Shared React components
│   │   ├── hooks/       # React hooks
│   │   ├── shared/      # Shared TypeScript types
│   │   ├── config/      # Config parsing and schemas
│   │   └── lib/         # Utilities (logger, api helpers)
│   ├── docs/
│   │   └── API.md       # REST API documentation (CONFIG.md is a moved-stub)
│   └── scripts/         # Setup and build scripts
├── docs/                # configuration.md (canonical config reference), architecture, deployment
├── examples/
│   └── agent-template/  # Template for creating new agents
├── docker-compose.yml   # Docker deployment
└── CONTRIBUTING.md      # Code style, testing, PR guidelines

Architecture

AI Agent (Claude/Codex/Gemini)
        │
        │  MCP (HTTP)
        ▼
Gantry Server :3100
  ├── /mcp, /mcp/v2  MCP proxy (compound tools, guardrails, injections)
  ├── /api/*         REST API (agent status, comms, analytics, notes)
  └── /              Web dashboard (React + Next.js, SSE streams)
        │
        │  MCP (HTTP)
        ▼
game.spacemolt.com/mcp

Read the full file on GitHub · 132 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. 2mo ago First seen · 132 lines · 1,724 tokens per session scan A 19addd6a4aa5

Subscribe to this mod's changes

gantry AGENTS.md is an instructions file published in the GitHub repository geleynse/gantry (4 stars, last pushed 2mo ago), licensed MIT. It adds 1,724 tokens to every session, about $0.0069 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 2026-08-31.

Related

gantry AGENTS.md compared with instructions from other repositories

gantry AGENTS.md next to 6 instructions from other repositories
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