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/robotti-io/copilot-security-instructions/security-library-authoringgit clone --depth 1 https://github.com/Robotti-io/copilot-security-instructionsWrote 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/robotti-io/copilot-security-instructions/security-library-authoring)<a href="https://agentmods.dev/instructions/robotti-io/copilot-security-instructions/security-library-authoring"><img src="https://agentmods.dev/badge/instructions/robotti-io/copilot-security-instructions/security-library-authoring.svg" alt="Measured on agentmods" 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 | $0.00369 | $0.00369 |
| Opus 5 | $0.00185 | $0.00185 |
| Sonnet 5 | $0.00074 | $0.00074 |
| Haiku 4.5 | $0.00037 | $0.00037 |
Grade A, and why
copilot-security-instructions security-library-authoring.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 5d 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.
What it actually says
Security library authoring rules (this repo)
These rules apply to the root-level library content intended for AppSec “shift-left” use.
Global requirements
- Prefer deterministic, repeatable workflows.
- Always require evidence:
- reference exact file paths and (when possible) line ranges
- avoid speculative conclusions
- Avoid insecure “quick fixes”:
- do not recommend disabling security controls as the primary solution
- if a risky workaround is mentioned, it must be explicitly labeled temporary with safer alternatives
Root prompt files: prompts/*.prompt.md
- MUST include these sections:
## ✅ Context / Assumptions## 🔍 Procedure## 📦 Output Format## ✅ Quality checks
- MUST define an output schema that is easy to paste into issues/PRs:
- Findings list/table
- Severity / likelihood
- Evidence
- Remediation
- Verification steps
Skills: skills/**/SKILL.md
- MUST include YAML frontmatter with
nameanddescription. - MUST include:
- When to use
- Inputs to collect
- Step-by-step process
- Output format
- Examples
Agents: agents/*.agent.md
- MUST include YAML frontmatter with
description. - MUST define:
- operating principles
- how to handle missing info
- output format expectations (findings, fixes, verification)
README
- Prompt catalogue SHOULD include every file in
prompts/with a one-line description and intended use.
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.
- 5d ago First seen · 54 lines · 369 tokens per session scan A 3cab80056f41
copilot-security-instructions security-library-authoring.instructions.md is an instructions file published in the GitHub repository Robotti-io/copilot-security-instructions (42 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 369 tokens to every session, about $0.0018 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
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Copilot instructions for github/awesome-copilot, covering readme updates, prompt file guide, instruction file guide, agent file guide and agent skills guide.
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CLI Design Guidelines for visual output, styling, and user experience standards.
apm cicd.instructions.md
CI/CD Pipeline configuration for PyInstaller binary packaging and release workflow.
apm encoding.instructions.md
Cross-platform encoding rules — keep all source and CLI output within printable ASCII.
apm python.instructions.md
Python development guidelines.
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