project-layout

Documentation describing the Codegen Lab project layout, organization, and greenfield development process. Greenfield development means starting a new project without having to preserve an existing system.

In plain words
What is it for?
Use it to navigate the Codegen Lab codebase and follow its process when creating a new project.
Why use it?
It helps developers understand where project parts belong and how new work is organized.

Cursor rule for Cursor

Install

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.

agentmods
npx agentmods add rules/bossjones/datetime-mcp-server/project-layout
Clone the repo
git clone --depth 1 https://github.com/bossjones/datetime-mcp-server

Made for: Cursor.

Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 2,662 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.02662
Opus 5 $0.00000 $0.01331
Sonnet 5 $0.00000 $0.00532
Haiku 4.5 $0.00000 $0.00266

Measured yesterday against content hash 271c3cfe5b84, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

project-layout 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 yesterday.

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.

.cursor/rules/project-layout.mdc · 411 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

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.

  1. yesterday First seen · 411 lines · 0 tokens per session scan A 271c3cfe5b84

Subscribe to this mod's changes

project-layout is a cursor rule published in the GitHub repository bossjones/datetime-mcp-server (0 stars, last pushed 1y ago), with no licence file. It costs nothing until one of its globs matches a file; then it loads 2,662 tokens. 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.