Borrowing it
Nothing to install: this file belongs to arxdsilva/opencoverage. 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/arxdsilva/opencoverage/main/.github/copilot-instructions.mdgit clone --depth 1 https://github.com/arxdsilva/opencoverageWrote 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/arxdsilva/opencoverage/copilot-instructions)<a href="https://agentmods.dev/instructions/arxdsilva/opencoverage/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/arxdsilva/opencoverage/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/arxdsilva/opencoverage/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/arxdsilva/opencoverage/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 | $0.01256 | $0.01256 |
| Opus 5.5 | $0.00502 | $0.00502 |
| Sonnet 5.5 | $0.00251 | $0.00251 |
| Haiku 4.5 | $0.00126 | $0.00126 |
Grade A, and why
opencoverage 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 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.
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 — 148 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Copilot Instructions for coverage-api
Never commit generated code, all code must be manually reviewed and edited as needed to fit architecture and style guidelines. Always follow the architecture and coding standards defined in copilot-instructions.md.
Mission
Build and evolve a Go REST API for coverage ingestion and comparison using Hexagonal Architecture, clean boundaries, and production-grade engineering practices.
Core Architecture: Hexagonal (Ports and Adapters)
Always organize code by domain boundaries and dependency direction.
- Domain is at the center and knows nothing about frameworks, transport, or databases.
- Application layer orchestrates use cases and depends only on domain + ports.
- Adapters implement ports for HTTP, PostgreSQL, auth, and observability.
- Dependencies point inward only.
Required Layers
Use this structure (or equivalent naming):
cmd/api- entrypoint and bootstrap wiringinternal/domain- entities, value objects, domain services, domain errorsinternal/application- use cases and port interfacesinternal/adapters/http- handlers, request/response DTOs, middlewareinternal/adapters/postgres- repository implementationsinternal/adapters/auth- API key validation adapterinternal/platform- config, logger, metrics, tracing, db client, clock/uuid abstractions
Do not place business rules in handlers, SQL repositories, or middleware.
Go Language Standards
- Target the current stable Go version used by the project.
- Keep packages cohesive and small.
- Prefer composition over inheritance-like patterns.
- Return errors, do not panic in normal control flow.
- Wrap errors with context using
fmt.Errorf("...: %w", err). - Keep interfaces near the consumer (application ports), not global interface files.
- Accept
context.Contextas first parameter for request-scoped operations. - Avoid package-level mutable state.
- Keep functions short and intention-revealing.
- Use constructor functions with explicit dependencies.
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 · 148 lines · 1,256 tokens per session scan A 8ecf3063a428
opencoverage copilot-instructions.md is an instructions file published in the GitHub repository arxdsilva/opencoverage (6 stars, last pushed yesterday), licensed MIT. It adds 1,256 tokens to every session, about $0.0050 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 2026-08-31.
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