Borrowing it
Nothing to install: this file belongs to kok-o/contextos-agents. 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/kok-o/contextos-agents/main/.github/copilot-instructions.mdgit clone --depth 1 https://github.com/kok-o/contextos-agentsWrote 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/kok-o/contextos-agents/copilot-instructions)<a href="https://agentmods.dev/instructions/kok-o/contextos-agents/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/kok-o/contextos-agents/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/kok-o/contextos-agents/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/kok-o/contextos-agents/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 | $0.00828 | $0.00828 |
| Opus 5.5 | $0.00331 | $0.00331 |
| Sonnet 5.5 | $0.00166 | $0.00166 |
| Haiku 4.5 | $0.00083 | $0.00083 |
Grade A, and why
contextos-agents 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 today.
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.
How it starts
The opening of the file, as written. The whole thing — 79 lines — stays where its author put it; the contents beside it link to each section on GitHub.
GitHub Copilot Instructions — ContextOS
Project Rules
Step 0 — Identify Before Acting
When useful for substantial work, identify:
1. WHAT DOMAIN? → Frontend / Backend / Architecture / Full-Stack / DevOps
2. WHAT PHASE? → Define / Plan / Build / Verify / Review / Ship
3. WHAT ROLE? → Declare specialist role for this phase
Anti-Spam Invariant: Declare this strictly once at the start of a task or phase. Never repeat before intermediate tool calls or step updates.
Non-Negotiable Rules
- Zero-Assumption Investigation: Never guess file paths or signatures. Inspect before modifying.
- Zero-Placeholder Production Code: Never emit lazy stubs,
// TODO, or partial code. - Mandatory Proof-of-Work Verification: Always run tests and validators before claiming completion.
- Surgical Blast Radius: Modify only files strictly within scope.
- Fast-Track Exception: Routine maintenance, git commands, version bumps, typo fixes, and diagnostics skip spec/plan ceremonies.
Skills Library
ContextOS uses on-demand progressive disclosure. Read the relevant SKILL.md file only when your task matches the trigger.
Skill Routing Table
| Trigger / Domain | Skill | Path |
|---|---|---|
context-manager |
context-manager | .agents/core/skills/context-manager/SKILL.md |
context-os |
context-os | .agents/core/skills/context-os/SKILL.md |
engineering-workflow |
engineering-workflow | .agents/core/skills/engineering-workflow/SKILL.md |
gemini-precision |
gemini-precision | .agents/core/skills/gemini-precision/SKILL.md |
gstack-roles |
gstack-roles | .agents/core/skills/gstack-roles/SKILL.md |
ponytail-mindset |
ponytail-mindset | .agents/core/skills/ponytail-mindset/SKILL.md |
security |
security | .agents/core/skills/security/SKILL.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.
- today Changed · -1 lines · -70 tokens per session c3b8b8bc3af6
- today First seen · 80 lines · 898 tokens per session scan A 62543b14488e
contextos-agents copilot-instructions.md is an instructions file published in the GitHub repository kok-o/contextos-agents (10 stars, last pushed today), licensed Apache-2.0. It adds 828 tokens to every session, about $0.0033 per session on Opus 5.5. 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 2026-10-25.
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