Borrowing it
Nothing to install: this file belongs to cai-layer/cai. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/cai-layer/cai/master/.github/copilot-instructions.mdgit clone --depth 1 https://github.com/cai-layer/caiWrote 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.
[](https://agentmods.dev/instructions/cai-layer/cai/copilot-instructions)<a href="https://agentmods.dev/instructions/cai-layer/cai/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/cai-layer/cai/copilot-instructions/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.
<a href="https://agentmods.dev/instructions/cai-layer/cai/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/cai-layer/cai/copilot-instructions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.02143 | $0.02143 |
| Opus 5.5 | $0.00857 | $0.00857 |
| Sonnet 5.5 | $0.00429 | $0.00429 |
| Haiku 4.5 | $0.00214 | $0.00214 |
Grade A, and why
cai copilot-instructions.md scanned grade A with 1 finding 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 1mo 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
Same rule for `NSAppleScript` / `osascript`. Use the existing AppleScript escaper (backslash, quotes, newlines). A clipboard containing `"; do shell script "curl …"` is the canonical attack. How it starts
The opening of the file, as written. The whole thing — 143 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Cai — Copilot Review Instructions
Native macOS menu bar clipboard manager (SwiftUI + AppKit, macOS 14+, Apple Silicon). Privacy-first: no cloud, no telemetry.
Every rule here should be verifiable from a diff. If a rule fires, say why and cite the file/line. Be terse — one-line review comments, no essays.
Basics (merge-blocking)
- PR must build:
xcodebuild -scheme Cai -configuration Debug build - PR must pass tests:
xcodebuild -scheme Cai -configuration Debug test - 40+ content detection tests in
CaiTests/ContentDetectorTests.swift— these are the regression net
🔴 Security & privacy (merge-blocking)
Never log clipboard text, LLM prompts/output, API keys, or paths under ~
Flag any new print(…), NSLog(…), os_log(…), CrashReportingService breadcrumb, or SentrySDK.capture* call that includes these values — even in debug branches. The product ships with "no telemetry" as a core promise; one print("clipboard: \(text)") reaching Console.app breaks it.
Never interpolate untrusted text into a shell invocation
Flag "/bin/zsh -c \"\(text)\"" and any concatenation of clipboard/LLM text into shell command strings. Shell templates must go through the existing single-quote escaper in OutputDestinationService / ActionListWindow.runShellCommand. Raw text as a literal element in Process.arguments is fine; raw text inside -c is not.
Never interpolate untrusted text into AppleScript source
Same rule for NSAppleScript / osascript. Use the existing AppleScript escaper (backslash, quotes, newlines). A clipboard containing "; do shell script "curl …" is the canonical attack.
Deeplink substitution must use .urlQueryAllowed
Not .urlPathAllowed or .urlFragmentAllowed. Flag addingPercentEncoding(withAllowedCharacters:) with a wider set.
Webhook/deeplink URLs must stay HTTPS
Enforced in ExtensionParser and the extensions repo CI. Don't weaken or add an allowInsecure escape hatch without a separate security review. HTTPS doesn't block SSRF to localhost.* cert-holders — if a PR adds new webhook destinations, consider whether private-IP blocking is warranted.
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.
- 1mo ago First seen · 143 lines · 2,143 tokens per session scan A 166bb9fc6d67
cai copilot-instructions.md is an instructions file published in the GitHub repository cai-layer/cai (59 stars, last pushed 17d ago), licensed MIT. It adds 2,143 tokens to every session, about $0.0086 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
vscode model-prompts.instructions.md
Model-specific prompt authoring and registry guidelines.