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/s13g/engineering-standards-plugin/copilot-instructionsgit clone --depth 1 https://github.com/S13G/engineering-standards-pluginWhat 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 | $0.00162 | $0.00162 |
| Opus 5 | $0.00081 | $0.00081 |
| Sonnet 5 | $0.00032 | $0.00032 |
| Haiku 4.5 | $0.00016 | $0.00016 |
Grade A, and why
engineering-standards-plugin 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.
What it actually says
Engineering Standards
Follow the engineering standard defined in AGENTS.md at the repository root, and load the per-domain deep-dive under skills/engineering-standards/reference/<domain>.md when relevant.
Apply its Universal Laws to all code you write, review, refactor, or design — silently, without narrating the rules. The priority order is fixed: Correct → Clear → Simple → Maintainable → Fast.
When a task touches a specific domain, open and apply the matching deep-dive file under skills/engineering-standards/reference/: architecture, paradigms, algorithms, backend, data, concurrency, frontend, mobile, cloud, systems, security, testing, git-craft.
Before calling work done, pass the Review Gate in AGENTS.md.
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 · 11 lines · 162 tokens per session scan A 7587b8e43c0e
engineering-standards-plugin copilot-instructions.md is an instructions file published in the GitHub repository S13G/engineering-standards-plugin (3 stars, last pushed 3mo ago), licensed MIT. It adds 162 tokens to every session, about $0.0008 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 2026-08-31.
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