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/reactiveui/primitives/copilot-instructionsgit clone --depth 1 https://github.com/reactiveui/PrimitivesWhat 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 | $0.00033 | $0.00033 |
| Opus 5 | $0.00016 | $0.00016 |
| Sonnet 5 | $0.00007 | $0.00007 |
| Haiku 4.5 | $0.00003 | $0.00003 |
Grade A, and why
Primitives copilot-instructions.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.
Copies of this mod
1 near-identical copy found in the catalogue:
- Primitives AGENTS.md — 86% identical, 3 lines differ
What it actually says
GitHub Copilot Instructions for ReactiveUI.Primitives
Compatibility entrypoint only.
Follow CLAUDE.md in this repository as the authoritative instruction file.
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 · 5 lines · 33 tokens per session scan A e091f11f6ae4
Primitives copilot-instructions.md is an instructions file published in the GitHub repository reactiveui/Primitives (12 stars, last pushed 2d ago), licensed MIT. It adds 33 tokens to every session, about $0.0002 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
moorestech AGENTS.md
AGENTS.md instructions for moorestech/moorestech, covering コーディングの指針, qa（必須）, 互換性とパフォーマンス, 既知の制約（設計上の割り切り） and regionの活用.
moorestech CLAUDE.md
Claude Code instructions for moorestech/moorestech, a project described as: Animated open world automated factory game.
dev-habit copilot-instructions.md
Copilot instructions for jaimejaramilloperez/dev-habit, covering general, c# guidelines, formatting, nullable reference types and asynchronous code.
maui uitests.instructions.md
Instructions for dotnet/maui, covering ui testing guidelines for .net maui, ui test structure, two-project requirement, base class and infrastructure and naming conventions.
maui ci-copilot-pipeline-security.instructions.md
Security rules for the Copilot PR-review pipeline. Read before editing.
maui performance-hotpaths.instructions.md
Instructions for dotnet/maui, covering performance-critical path rules, hot paths in maui, allocation avoidance, caching and invalidation and collection iteration.