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ts-bench: Instructions file for GitHub Copilot

.github/copilot-instructions.md

ts-bench copilot-instructions.md is an instructions file for GitHub Copilot from laiso/ts-bench. It costs 230 tokens per session, scanned A, original, MIT.

Contributor instructions for ts-bench, a command-line benchmark for comparing AI coding agents on TypeScript tasks. They specify the runtime, testing rules, agent registration, authentication setup, and Docker requirements.

In plain words
What is it for?
Use them to add agents, run tests, set up authentication, prepare the Docker environment for v2, and follow the project's pull-request rules.
Why use it?
They prevent contributors from using the wrong commands or missing required tests and environment setup.

Instructions file for GitHub Copilot

Written for GitHub Copilot: a Copilot instructions file. Also seen: mentions Codex.

This is laiso/ts-bench's own configuration. It tells GitHub Copilot how to work on ts-bench itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything ts-bench configures →

not rated 243repo 2mo ago A scan 230 tokens original MIT
View source ↗ laiso/ts-bench laiso.github.io
Reuse

Borrowing it

Nothing to install: this file belongs to laiso/ts-bench. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/laiso/ts-bench/main/.github/copilot-instructions.md
Clone the repo
git clone --depth 1 https://github.com/laiso/ts-bench

Made for: GitHub Copilot.

Wrote 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.

agentmods badge for ts-bench copilot-instructions.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/laiso/ts-bench/copilot-instructions/github.svg)](https://agentmods.dev/instructions/laiso/ts-bench/copilot-instructions)
Your own site
<a href="https://agentmods.dev/instructions/laiso/ts-bench/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/laiso/ts-bench/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.

agentmods 80×15 button for ts-bench copilot-instructions.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/laiso/ts-bench/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/laiso/ts-bench/copilot-instructions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 230 This file is loaded in full into every session.
When invoked 230 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00230 $0.00230
Opus 5.5 $0.00092 $0.00092
Sonnet 5.5 $0.00046 $0.00046
Haiku 4.5 $0.00023 $0.00023

Measured 2mo ago against content hash 24405f061a71, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ts-bench 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.

.github/copilot-instructions.md · 12 lines

What it actually says

Copilot Instructions for ts-bench

Always use bun, never node or npm run.

  • Any new or changed code must include tests. Run bun test ./src and confirm all pass.
  • Exercism placeholder code is intentionally broken; --test-only failures on unmodified exercises are expected.
  • Exercise tests use Yarn v4 (corepack yarn). Install corepack if missing: npm install -g [email protected] && corepack enable.
  • To add an agent: add a builder in src/agents/builders/ and register it in src/agents/factory.ts.
  • v2 (SWE-Lancer) requires Docker. One-time setup: ./scripts/setup-v2-env.sh. Image: swelancer/swelancer_x86_monolith:releasev1 (~15 GB).
  • Subscription-based auth (no API key) for Claude, Gemini, Codex: bun src/index.ts --setup-auth <agent>.
  • All pull request titles and descriptions must be written in English.
Changes

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.

  1. 2mo ago First seen · 12 lines · 230 tokens per session scan A 24405f061a71

Subscribe to this mod's changes

ts-bench copilot-instructions.md is an instructions file published in the GitHub repository laiso/ts-bench (243 stars, last pushed 2mo ago), licensed MIT. It adds 230 tokens to every session, about $0.0009 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.

LLMLanguagesTestingTypeScriptai-agents
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