What is Lucerne AGENTS.md?

Repository instructions for Lucerne, describing what the project does, an important environment requirement, and its architecture. Architecture means the main way a software project is organised.

Guiding work on Lucerne while respecting its environment requirement and overall design.

They provide the context and environment warning an AI coding agent needs before changing the repository.

How L-K-M/Lucerne configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to L-K-M/Lucerne. 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/L-K-M/Lucerne/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/L-K-M/Lucerne

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/l-k-m/lucerne/agents-md/github.svg)](https://agentmods.dev/instructions/l-k-m/lucerne/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/l-k-m/lucerne/agents-md"><img src="https://agentmods.dev/badge/instructions/l-k-m/lucerne/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/l-k-m/lucerne/agents-md"><img src="https://agentmods.dev/badge/instructions/l-k-m/lucerne/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 5,360 This file is loaded in full into every session.

When invoked 5,360 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 unknown 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.

Model	Per session	Once invoked
Fable 5.1	$0.05360	$0.05360
Opus 5.5	$0.02144	$0.02144
Sonnet 5.5	$0.01072	$0.01072
Haiku 4.5	$0.00536	$0.00536

Measured 8d ago against content hash 11157f6729e2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

Lucerne 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 8d 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 · 423 lines

The source is not reproduced here

No licence file

Read it on GitHub

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.

8d ago Changed · +5 lines · +86 tokens per session 11157f6729e2
10d ago Changed · +16 lines · +233 tokens per session 6c7a1784bd4f
1mo ago Changed · +18 lines · +244 tokens per session b9d586cc7f5f
1mo ago Changed · +7 lines · +59 tokens per session 762f256238e9
1mo ago Changed · +146 lines · +1,271 tokens per session 5cd06b5579d8
2mo ago First seen · 231 lines · 3,467 tokens per session scan A fd080684690a

Subscribe to this mod's changes

Lucerne AGENTS.md is an instructions file published in the GitHub repository L-K-M/Lucerne (5 stars, last pushed 2d ago), with no licence file. It adds 5,360 tokens to every session, about $0.0214 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.

Lucerne AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
Lucerne AGENTS.mdL-K-M/Lucerne	Instructions file	5	2d ago	none	A	5,360	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

Lucerne: Instructions file for Codex