Borrowing it
Nothing to install: this file belongs to hecatehq/hecate. 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/hecatehq/hecate/master/.github/copilot-instructions.mdgit clone --depth 1 https://github.com/hecatehq/hecateWrote 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/hecatehq/hecate/copilot-instructions)<a href="https://agentmods.dev/instructions/hecatehq/hecate/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/hecatehq/hecate/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/hecatehq/hecate/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/hecatehq/hecate/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 | $0.00348 | $0.00348 |
| Opus 5.5 | $0.00139 | $0.00139 |
| Sonnet 5.5 | $0.00070 | $0.00070 |
| Haiku 4.5 | $0.00035 | $0.00035 |
Grade A, and why
hecate 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 2mo 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
Hecate Copilot Instructions
Hecate is an open-source local AI operations console for supervised agent work.
It combines a model gateway, Hecate Chat, queued agent_loop tasks, External
Agent supervision, projects, memory, approvals, artifacts, usage, and
OpenTelemetry traces into one operator surface.
This file is a GitHub Copilot adapter shim. The canonical provider-neutral
guidance lives in AGENTS.md and docs-ai/; read those before changing code.
Do not copy long-form rules into this file.
Universal rules:
- Keep changes scoped to the user request and the existing architecture.
- Follow
docs-ai/core/engineering-standards.mdanddocs-ai/core/workflow.md. - Use the relevant
docs-ai/skills/*/SKILL.mdfor the area being changed. - Do not create Claude-, Cursor-, Codex-, or Copilot-specific copies of shared guidance.
- Do not auto-commit. Suggest a Conventional Commit message when useful.
- Report the verification you ran, and call out anything you could not run.
Verification starts at docs-ai/core/verification.md. Common gates:
- Backend/runtime: focused
go test, thengo test -race -timeout 10m ./...orjust test-racefor broad runtime changes. - E2E:
go test -tags e2e ./e2e/.... - UI:
cd ui && bun run typecheck && bun run test; never usebun test. - Agent docs:
just agent-docs-check,just docs-format-check, andjust check-linkswhen links change.
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.
- 2mo ago First seen · 31 lines · 348 tokens per session scan A ba3e86467f9a
hecate copilot-instructions.md is an instructions file published in the GitHub repository hecatehq/hecate (24 stars, last pushed yesterday), licensed MIT. It adds 348 tokens to every session, about $0.0014 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 2026-08-30.
hecate copilot-instructions.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| hecate copilot-instructions.mdhecatehq/hecate | Instructions file | 24 | yesterday | MIT | A | 348 | GitHub Copilot |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | today | MIT | A | 7,461 | Codex, OpenCode |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | yesterday | MIT | A | 4,680 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |