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/fixed-width/glass/claude-mdgit clone --depth 1 https://github.com/fixed-width/glassWhat 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 | $0.01052 | $0.01052 |
| Opus 5 | $0.00526 | $0.00526 |
| Sonnet 5 | $0.00210 | $0.00210 |
| Haiku 4.5 | $0.00105 | $0.00105 |
Grade A, and why
glass CLAUDE.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.
This is a copy
89% identical to glass AGENTS.md — 15 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 71 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
Guidance for Claude Code working in the glass open-core Rust workspace.
This repository is PUBLIC. Keep internal business/strategy, licensing-strategy framing, planning and design specs, and the internal security threat model out of this repo — that material lives in the private
fixed-widthrepo. Document what the product does, never why it helps the business.
What glass is
A Rust MCP server giving an AI agent a closed build → see → interact → debug loop
over external native GUI apps: launch, capture (lossless WebP), inject mouse/keyboard,
read logs, diff against baselines, wait-until-stable, and read/drive the accessibility
tree — served over MCP (stdio, or serve --http). Backends behind a Platform seam: X11
and Wayland (headless sway) on Linux, Windows (WGC/SendInput), Android (native apps in an AVD
emulator over adb, host-OS-agnostic; clipboard + high-fidelity input via an optional
on-device companion agent), iOS (native apps in the Simulator over xcrun simctl; capture,
logs, clipboard, plus input and the accessibility tree via idb_companion, including a
two-finger pinch; other multi-touch gestures excepted), macOS (ScreenCaptureKit
capture, CGEvent input, AXUIElement
windows/logs, accessibility tree, clipboard (isolated + working under containment for
apps not built with hardened runtime, via a DYLD_INSERT_LIBRARIES swizzle shim;
hardened-runtime apps fall back to unsupported), sandboxing (Seatbelt)).
Layout
Cargo workspace at the repo root. Crates: glass-core (platform-agnostic heart — the
Platform/Accessibility seams, session, Frame, diff, stability, log buffer), the
backends (glass-x11, glass-wayland, glass-windows, glass-android, glass-ios (the iOS
Simulator backend over xcrun simctl), glass-macos), the a11y readers
(glass-a11y-linux, glass-a11y-windows, glass-a11y-macos; the Android uiautomator
reader lives in glass-android), glass-sandbox-linux, glass-sandbox-macos, the glass-mcp server binary, and the
glass-testapp fixture. glass-android also holds the host-side client + lifecycle for two
optional on-device companions — an app_process agent (clipboard + high-fidelity input) and an
AccessibilityService (Compose-rich a11y tree + high-fidelity set_value); both live in the
separate repo github.com/fixed-width/glass-android-agent, driven over adb forward.
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 · 71 lines · 1,052 tokens per session scan A b10ff6cd8e19
glass CLAUDE.md is an instructions file published in the GitHub repository fixed-width/glass (12 stars, last pushed 2d ago), licensed Apache-2.0. It adds 1,052 tokens to every session, about $0.0053 per session on Opus 5. A static security scan graded it A with 0 findings. It is 89% identical to glass AGENTS.md, differing in 15 lines, and is treated as a copy.
Other instructions, from other repositories
unity-cross-platform-local-build-orchestrator AGENTS.md
Instructions for sinanata/unity-cross-platform-local-build-orchestrator, covering agents.md, what this project is, golden rules (do not violate), use it and interface.
flutter-agentic-starter CLAUDE.md
Instructions for tsnAnh/flutter-agentic-starter, covering claude.md, role & responsibilities, workflows, karpathy guidelines and hard development rules.
unity-cross-platform-local-build-orchestrator copilot-instructions.md
Instructions for sinanata/unity-cross-platform-local-build-orchestrator: This repository follows the cross-tool AGENTS.md standard. Read /AGENTS.md for the full guide: the script/CLI interface, the config workflow, and the operating rules.
flutter-agentic-starter AGENTS.md
Instructions for tsnAnh/flutter-agentic-starter, covering agents.md, project overview, role & responsibilities, workflows and development principles.
xtool CLAUDE.md
Instructions for 2389-research/xtool, covering xtool plugin, skills included, using-xtool (main skill), key patterns and xtool is not xcodegen.
alliswell AGENTS.md
AGENTS.md instructions for mahirozdin/alliswell, covering agents.md — operating manual for ai agents (and humans), 1. hard rules (non-negotiable), 2. the "do the next task" protocol, 3. definition of done (checklist) and 4. code conventions.