What is ts-bench AGENTS.md?

Project instructions for ts-bench, a Bun-based command-line benchmark that compares AI coding agents on TypeScript work.

Use them when changing the project: run commands with Bun, execute the main test suite, understand the expected Exercism placeholder failures, and prepare the optional v2 environment.

They keep contributors using the required tooling and clarify which test failures are intentional and when Docker setup is needed.

How laiso/ts-bench configures Codex and OpenCode

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/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/laiso/ts-bench

Made for: Codex, OpenCode.

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/laiso/ts-bench/agents-md/github.svg)](https://agentmods.dev/instructions/laiso/ts-bench/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/laiso/ts-bench/agents-md"><img src="https://agentmods.dev/badge/instructions/laiso/ts-bench/agents-md/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/laiso/ts-bench/agents-md"><img src="https://agentmods.dev/badge/instructions/laiso/ts-bench/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 113 This file is loaded in full into every session.

When invoked 113 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.

Model	Per session	Once invoked
Fable 5.1	$0.00113	$0.00113
Opus 5.5	$0.00045	$0.00045
Sonnet 5.5	$0.00023	$0.00023
Haiku 4.5	$0.00011	$0.00011

Measured 2mo ago against content hash f774aad3d439, 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 AGENTS.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.

AGENTS.md · 8 lines

What it actually says

AGENTS.md

ts-bench: TypeScript AI Agent Benchmark CLI (Bun). See README.md, specs/000-project-handbook/.

Always use bun — never node/npm run. Run bun test ./src for all changes and confirm pass.
Exercism placeholder code is intentionally broken; --test-only failures are expected.
v2 (SWE-Lancer): Docker required, ~15 GB image. Run ./scripts/setup-v2-env.sh once.

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.

2mo ago First seen · 8 lines · 113 tokens per session scan A f774aad3d439

Subscribe to this mod's changes

ts-bench AGENTS.md is an instructions file published in the GitHub repository laiso/ts-bench (243 stars, last pushed 2mo ago), licensed MIT. It adds 113 tokens to every session, about $0.0005 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.

Analytics and metrics Building agents LLM ai-agents

ts-bench AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
ts-bench AGENTS.mdlaiso/ts-bench	Instructions file	243	2mo ago	MIT	A	113	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	today	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	today	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

ts-bench: Instructions file for Codex