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.
npx agentmods add instructions/pascalorg/editor/agents-mdgit clone --depth 1 https://github.com/pascalorg/editorWhat 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 | $0.00878 | $0.00878 |
| Opus 5 | $0.00439 | $0.00439 |
| Sonnet 5 | $0.00176 | $0.00176 |
| Haiku 4.5 | $0.00088 | $0.00088 |
Grade A, and why
editor 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 2d 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 — 53 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent Instructions — pascalorg/editor
Public, open-source home of @pascal-app/{core,viewer,editor,mcp} and the standalone editor app. Consumed both as npm packages and (in pascalorg/private-editor) as a git submodule.
Repo Shape
| Path | Purpose |
|---|---|
packages/core |
Scene graph, node schemas, stores, event bus, core systems — pure logic, no Three.js |
packages/viewer |
Standalone 3D canvas: renderers, viewer systems, presentation state |
packages/editor |
Editor UI components reused by the standalone app and embedders |
packages/mcp |
MCP server and scene storage adapters |
apps/editor |
Standalone editor app — composes viewer + editor + tools |
Where to look
- Architecture rules —
wiki/architecture/(read on demand; index inwiki/architecture/README.md). - Skills (ready workflows) —
.agents/skills/<name>/SKILL.md. Same content is reachable as.claude/skills/,.cursor/skills/,.codex/skills/(symlinks to.agents/skills/). - Repo orientation for humans —
README.md,SETUP.md,CONTRIBUTING.md.
CLAUDE.md, GEMINI.md, and .github/copilot-instructions.md are symlinks to this file. Codex reads this file directly.
Layer Boundaries (read once, internalise)
packages/coreowns domain data and pure logic. It must not import Three.js,packages/viewer,apps/editor, rendering/UI concepts, tools, modes, phases, or view-specific concepts such as floorplan or paint preview.packages/viewerowns the standalone 3D canvas, renderers, viewer systems, and genuine presentation state. It must not know aboutuseEditor, editor tools, phases, modes, paint mode, floorplan state, or editor-only presentation vocabulary.apps/editorowns the editing experience: tools,useEditor, panels, floorplan helpers, paint mode, keyboard shortcuts, command palette, action menus, cursor badges, and editor-only overlays. Editor features are injected into<Viewer>via props and children.
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.
- 2d ago First seen · 53 lines · 878 tokens per session scan A 156439803a35
editor AGENTS.md is an instructions file published in the GitHub repository pascalorg/editor (21,769 stars, last pushed 3d ago), licensed MIT. It adds 878 tokens to every session, about $0.0044 per session on Opus 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
archlang AGENTS.md
Instructions for ChanMeng666/archlang, covering agents.md, project overview, project status & where things live (current), standing decisions & iron laws (never re-litigate) and commands.
archlang CLAUDE.md
Instructions for ChanMeng666/archlang, covering claude.md, orientation (the rest is in agents.md), non-negotiable invariants (break these and ci fails), verify your work the way the tool is used and conventions.
cad-mcp-server AGENTS.md
Instructions for mattmohandiss/cad-mcp-server, covering cad mcp server — agent guide, product rules, prerequisites, setup and common commands.
agentic-bim-team CLAUDE.md
Instructions for louistrue/agentic-bim-team, covering bim agent team — swiss residential construction, ifc analysis & creation (ifc-lite cli), quick reference, ifc create element types and supported --from-json fields per type (examples).
vscode tree-widgets.instructions.md
Use when asked to consume workbench tree widgets in VS Code.
vscode accessibility.instructions.md
Use when implementing accessibility features, ARIA labels, screen reader support, accessible help dialogs, or keybinding scoping for accessibility. Covers AccessibleContentProvider, CONTEXTACCESSIBILITYMODEENABLED, verbosity settings, and announcement patterns.