Borrowing it
Nothing to install: this file belongs to plausibleventures/lattice. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/plausibleventures/lattice/main/AGENTS.mdgit clone --depth 1 https://github.com/plausibleventures/latticeWrote 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.
[](https://agentmods.dev/instructions/plausibleventures/lattice/agents-md)<a href="https://agentmods.dev/instructions/plausibleventures/lattice/agents-md"><img src="https://agentmods.dev/badge/instructions/plausibleventures/lattice/agents-md/github.svg" alt="Measured on agentmods" height="20"></a>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.
<a href="https://agentmods.dev/instructions/plausibleventures/lattice/agents-md"><img src="https://agentmods.dev/badge/instructions/plausibleventures/lattice/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.03095 | $0.03095 |
| Opus 5.5 | $0.01238 | $0.01238 |
| Sonnet 5.5 | $0.00619 | $0.00619 |
| Haiku 4.5 | $0.00310 | $0.00310 |
Grade A, and why
lattice 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.
How it starts
The opening of the file, as written. The whole thing — 220 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Lattice — how to work in this repo
Lattice is a kit for building isometric, deterministic, zero-asset games in TypeScript. Nine small libraries that compose, and a real game built from nothing but them.
This file is the constitution. It is written for agents first and humans second, because agents outnumber humans here. Read it before you touch anything. It is short on purpose.
- What each package is →
.lattice/kit.json(machine-readable),README.md§ The nine packages, and each package's ownREADME.md. The cross-package contracts are indocs/SEAMS.md - What to work on next →
.lattice/tasks.json - Where the build is →
.lattice/state.json - How one work cycle runs →
docs/LOOP.md
The eleven non-negotiables
These are not preferences. A change that breaks one of these is reverted, not debated.
-
Determinism is a feature, not an accident.
Math.random(),Date.now(), andperformance.now()are banned inside every package'ssrc/. Randomness comes from a seededRngpassed in by the caller; time arrives as a parameter. This is enforced bynpm run lint. A game built on Lattice must be able to replay a session from a seed and an input log and land on the same pixel.And it has two tiers, because the language only promises so much. ECMA-262 specifies
+ - * /,Math.sqrt,Math.imuland the bitwise operators exactly. It explicitly does not requiresin,cos,pow,exporlogto be correctly rounded, so two conforming engines may disagree in the last bit.arithmetic promise may reach Tier A + - * /,sqrt,imul, bitwisebit-identical on every engine hashes, save files, replays, anything Tier B sin,cos,pow,exp,log, …correct to within an ulp or so pixels only — never hashed, never persisted Tier B is not banned; a cost curve is
b · r^kand there is no honest way around that. It is required to declare itself: mark the site@tier-band the linter is satisfied. That makes every one of them greppable, so an auditor can ask of each in turn whether it ever reaches a save file.
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.
- 1mo ago First seen · 220 lines · 3,095 tokens per session scan A e382ba853b2b
lattice AGENTS.md is an instructions file published in the GitHub repository plausibleventures/lattice (40 stars, last pushed 1mo ago), licensed MIT. It adds 3,095 tokens to every session, about $0.0124 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.
Other instructions, from other repositories
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).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
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 copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.