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.
npx agentmods add instructions/agent0ai/space-agent/agents-mdgit clone --depth 1 https://github.com/agent0ai/space-agentWhat 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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.01048 | $0.01048 |
| Opus 5 | $0.00524 | $0.00524 |
| Sonnet 5 | $0.00210 | $0.00210 |
| Haiku 4.5 | $0.00105 | $0.00105 |
Grade A, and why
space-agent 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 2d 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.
How it starts
The opening of the file, as written. The whole thing — 94 lines — stays where its author put it; the contents beside it link to each section on GitHub.
DOX framework
- DOX is highly performant AGENTS.md hierarchy installed here
- Agent must follow DOX instructions across any edits
Core Contract
- AGENTS.md files are binding work contracts for their subtrees
- Work products, source materials, instructions, records, assets, and durable docs must stay understandable from the nearest applicable AGENTS.md plus every parent AGENTS.md above it
Read Before Editing
- Read the root AGENTS.md
- Identify every file or folder you expect to touch
- Walk from the repository root to each target path
- Read every AGENTS.md found along each route
- If a parent AGENTS.md lists a child AGENTS.md whose scope contains the path, read that child and continue from there
- Use the nearest AGENTS.md as the local contract and parent docs for repo-wide rules
- If docs conflict, the closer doc controls local work details, but no child doc may weaken DOX
Do not rely on memory. Re-read the applicable DOX chain in the current session before editing.
Update After Editing
Every meaningful change requires a DOX pass before the task is done.
Update the closest owning AGENTS.md when a change affects:
- purpose, scope, ownership, or responsibilities
- durable structure, contracts, workflows, or operating rules
- required inputs, outputs, permissions, constraints, side effects, or artifacts
- user preferences about behavior, communication, process, organization, or quality
- AGENTS.md creation, deletion, move, rename, or index contents
Update parent docs when parent-level structure, ownership, workflow, or child index changes. Update child docs when parent changes alter local rules. Remove stale or contradictory text immediately. Small edits that do not change behavior or contracts may leave docs unchanged, but the DOX pass still must happen.
Hierarchy
- Root AGENTS.md is the DOX rail: project-wide instructions, global preferences, durable workflow rules, and the top-level Child DOX Index
- Child AGENTS.md files own domain-specific instructions and their own Child DOX Index
- Each parent explains what its direct children cover and what stays owned by the parent
- The closer a doc is to the work, the more specific and practical it must be
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.
- 2d ago First seen · 94 lines · 1,048 tokens per session scan A 41044c3bf093
space-agent AGENTS.md is an instructions file published in the GitHub repository agent0ai/space-agent (1,390 stars, last pushed 2mo ago), licensed MIT. It adds 1,048 tokens to every session, about $0.0052 per session on Opus 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.
Other instructions, from other repositories
spec-kit AGENTS.md
AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).
next.js AGENTS.md
Instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.