RuleSource Checked
Read the repo before you plan
Ground every plan in the actual file tree, scripts, constraints, and current behavior.
Issue 001 A living field manual
Better instructions make better software.
Rules, prompts, tools, and working references for people building with coding agents. Filter the library your way, copy what helps, and share the exact view.
Choose a lens
One library, many useful paths.
Nothing is trapped in a single folder. Start from an engine, a task, a platform, or the kind of thing you need.
01
Three.js field notes
Rendering, cleanup, profiling, React Three Fiber, and working examples.
15 entries 02Web physics
Rapier, Box2D, Box3D, Cannon-es, Ammo.js, Havok, and stable timesteps.
14 entries 03Unity and PC
Editor behavior, PhysX, profiling, builds, and review boundaries.
4 entries 04Unreal and Chaos
Engine docs, project structure, C++, Blueprints, and physics workflows.
4 entries 05Prompts that ship
Copy-ready prompts for planning, debugging, review, tests, and deployment.
5 prompts 06MCPs and agent tools
Official and community tools for browsers, Blender, Cloudflare, and coding agents.
5 entriesUseful this week
Start with something proven.
RuleTested
Keep build proof and runtime proof separate
A green build is useful evidence, but it is not evidence that the visible experience works.
RuleSource Checked
Dispose Three.js GPU resources explicitly
Remove stale geometries, materials, textures, and render targets when scenes change.
RuleTested
Run web physics on a fixed timestep
Keep simulation results stable across fast displays, slow frames, and recording tools.
PromptTested
Debug a blank Three.js canvas
A focused diagnostic prompt for the classic scene that renders nothing.
PromptSource Checked
Write a useful AGENTS.md
Turn repeated project knowledge into scoped, testable agent instructions.
Reorder the map
Your hierarchy should follow the question.
Put platform first when you are deciding where to ship. Put task first when you are stuck. Put physics engine first when you are comparing APIs. Every combination gets a clean, shareable URL.
Try the hierarchy builder01Web18
02Rapier7
03Debug4
Run physics on a fixed timestepRule · Tested
Review game physics feelPrompt · Tested
From the field journal
Notes on how the work is changing.
What People Are Actually Building With Codex
The most interesting Codex projects are not generic demos. They are personal tools, games, visual experiments, and narrow products with a reason to exist.
Read field noteA Codex, Blender, and Three.js Asset Loop
A small web game shows a useful way to move from code-shaped placeholder art to editable Blender assets without stopping development.
Read field noteCodex Joins the ChatGPT Desktop App
Codex now lives inside the ChatGPT desktop app, bringing repository work, review, Computer Use, and plugins into one surface.
Read field noteAdd what worked
Found a prompt worth keeping?
Submit a rule, prompt, tool, resource, or repository. You will get a private edit link, and every accepted change keeps its revision history.
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