nothing: Instructions file for Codex

AGENTS.md

nothing AGENTS.md is an instructions file for Codex, OpenCode from gridaco/nothing. It costs 3,476 tokens per session, scanned A, original, Apache-2.0.

Repository instructions for n0, a Rust-based 2D graphics engine used as a published web graphics package.

In plain words
What is it for?
Use them when changing the graphics engine, its Rust workspace, rendering behavior, tests, or web and WebAssembly output.
Why use it?
They explain the project boundaries, required checks, and rules for preventing rendering errors across its components.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: reads .claude/ paths; mentions AGENTS.md.

This is gridaco/nothing's own configuration. It tells Codex and OpenCode how to work on nothing 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 nothing configures →

Reuse

Borrowing it

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

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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Your own site
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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 3,476 This file is loaded in full into every session.
When invoked 3,476 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 $0.03476 $0.03476
Opus 5.5 $0.01390 $0.01390
Sonnet 5.5 $0.00695 $0.00695
Haiku 4.5 $0.00348 $0.00348

Measured 1mo ago against content hash 91d7e41c742e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

nothing 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 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.

AGENTS.md · 207 lines

How it starts

The opening of the file, as written. The whole thing — 207 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Hi robots, welcome to n0 ("nothing") — the Grida graphics engine.

README.md says what this engine is and why. This file is the working map: the laws that bind every change, the commands, the layout, and the caveats that are true right now.

n0 is a 2D graphics engine and a Rust-first Cargo workspace (resolver 3; members in the root Cargo.toml). The Grida product monorepo — editor, packages, services — is gridaco/grida; it consumes this repo only as the published @grida/canvas-wasm npm artifact. Do not add product/editor code here.

The laws (bind every change)

These are what keep two duty cycles, three source languages, and an editor from becoming three engines. Each has an enforcing mechanism — a law without one is a comment.

  • Never a silent wrong pixel. A construct the compiler cannot honour must refuse loudly (--strict) or be declared by name at a stable node path (best-effort). A patrol that over-refuses beats one that lets a wrong pixel through. Enforced by: the websem patrols, the refusal corpus, and the law that both admissions are frame-identical where nothing degrades.

  • One meaning, many policies. Render modes may differ in when and at what quality they paint — never in what things mean. Static is not a second renderer; it is the same pipeline with an empty temporal input set (no camera delta, no previous frame, no dirty set). Tripwire: a mode, budget, or quality flag must never become readable from websem, rframe, or resolve. The moment one is, two pipelines have started growing.

  • Realtime in structure, static in policy. The architecture that makes realtime possible ships from day one, because retrofitting it is the rebuild. The optimizations realtime needs ship only once measured, because an optimization is a relative claim — same as X, faster — and a cache built over an unverified X becomes a second place that believes the wrong answer. In tree: DirtyClass is fully classified in n0-model/src/ops.rs and referenced zero times in crates/n0/src. The socket is shaped, the policy is deliberately absent. Do not "finish" it without the gate below.

Read the full file on GitHub · 207 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 Changed · +21 tokens per session 91d7e41c742e
  2. 2mo ago First seen · 207 lines · 3,455 tokens per session scan A 2d6311460f95

Subscribe to this mod's changes

nothing AGENTS.md is an instructions file published in the GitHub repository gridaco/nothing (54 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 3,476 tokens to every session, about $0.0139 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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