Borrowing it
Nothing to install: this file belongs to anthony-chaudhary/fak. 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/anthony-chaudhary/fak/main/.github/copilot-instructions.mdgit clone --depth 1 https://github.com/anthony-chaudhary/fakWrote 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/anthony-chaudhary/fak/copilot-instructions)<a href="https://agentmods.dev/instructions/anthony-chaudhary/fak/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/anthony-chaudhary/fak/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/anthony-chaudhary/fak/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/anthony-chaudhary/fak/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 | $0.00580 | $0.00580 |
| Opus 5.5 | $0.00232 | $0.00232 |
| Sonnet 5.5 | $0.00116 | $0.00116 |
| Haiku 4.5 | $0.00058 | $0.00058 |
Grade A, and why
fak 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.
What it actually says
Copilot instructions
The canonical agent instructions for this repo are in AGENTS.md — read
it first for build/test/run, the repo map, and the rules. Curated doc map:
llms.txt. Contributor contract: CONTRIBUTING.md.
Must-know rules (enforced below the agent layer):
- Delegate substantive work and keep the coordinator context clean — use guarded
headless agents or equivalent isolated workers for investigation, implementation, tests,
and review. Keep only decisions and compact witnessed evidence in the primary context;
independently verify worker effects before landing or reporting them. Direct work is for
lightweight coordination and truly trivial tasks. See
AGENTS.md. - Default is to ship — when the tree is green (
make ci), commit AND push unprompted; decide from the work in front of you, you don't wait to be asked. The rules below gate that default (stay on trunk, commit by path, never force-push); if a guard refuses (OFF_TRUNK) or a peer's merge is mid-flight, reconcile in place or stop. - Work directly on the trunk (
main); never open a feature branch or worktree — the trunk guard refuses off-trunk commits (OFF_TRUNK). The one sanctioned exception: a detached per-worker worktree that lands onmainviafak worktree worker prepare|land|reap(build isolation, #1334) — detached and lane-serialized, it is not a branch and never tripsOFF_TRUNK. Feature branches and off-trunk commits stay forbidden. - Commit by explicit path (
git commit -- <paths>, nevergit add -A); sign off withgit commit -s(DCO). - Focus on "move forward" over "conclusions" — frame diagnostics, benchmarks, and failed attempts around actionable forward momentum. Rather than defeatist conclusions ("X didn't work ... therefore we suck..."), always identify the concrete next action ("the next step to get better performance is X") and state the next checkable step.
- Keep code comments succinct: omit comments that restate syntax or narrate each step. Preserve comments that explain non-obvious rationale, invariants, safety, concurrency, compatibility, or exported APIs; prefer clearer code and put durable tutorials in docs.
- The Go module is the repository root — run
gocommands from the clone root (go install github.com/anthony-chaudhary/fak/cmd/fak@latestresolves directly).
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 Changed · +4 lines · +77 tokens per session f2cab372c113
- 1mo ago First seen · 30 lines · 503 tokens per session scan A a8b40c4f82d5
fak copilot-instructions.md is an instructions file published in the GitHub repository anthony-chaudhary/fak (42 stars, last pushed today), licensed Apache-2.0. It adds 580 tokens to every session, about $0.0023 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 2026-09-03.
Other instructions, from other repositories
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