unsurf: Instructions file for Codex

AGENTS.md

unsurf AGENTS.md is an instructions file for Codex, OpenCode from acoyfellow/unsurf. It costs 610 tokens per session, scanned A, original, MIT.

Project instructions for unsurf, a tool that turns websites into typed APIs by observing their network requests, describing the endpoints, and replaying them. It can rescan when those paths stop working.

In plain words
What is it for?
Use them when changing unsurf’s Scout, Worker, Heal, API directory, database, Cloudflare Worker, MCP server, CLI, or related TypeScript services.
Why use it?
They explain the repository’s architecture, commands, services, and external resources so an agent can work within the project’s intended design.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions AGENTS.md.

This is acoyfellow/unsurf's own configuration. It tells Codex and OpenCode how to work on unsurf 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 unsurf configures →

Reuse

Borrowing it

Nothing to install: this file belongs to acoyfellow/unsurf. 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/acoyfellow/unsurf/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/acoyfellow/unsurf

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.

agentmods badge for unsurf AGENTS.md

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

agentmods 80×15 button for unsurf AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/acoyfellow/unsurf/agents-md"><img src="https://agentmods.dev/badge/instructions/acoyfellow/unsurf/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 610 This file is loaded in full into every session.
When invoked 610 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 $0.00610 $0.00610
Opus 5.5 $0.00244 $0.00244
Sonnet 5.5 $0.00122 $0.00122
Haiku 4.5 $0.00061 $0.00061

Measured 2mo ago against content hash 5fc57d97fbe6, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

unsurf 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 · 82 lines

How it starts

The opening of the file, as written. The whole thing — 82 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md — unsurf

What This Is

Turn any website into a typed API. Scout captures network traffic, infers schemas, outputs OpenAPI. Worker replays endpoints directly. Heal re-scouts when paths break.

Stack

  • Effect — typed errors, DI, streams, retries
  • Alchemy — infrastructure as TypeScript
  • Drizzle — typed SQL (D1/SQLite)
  • Cloudflare Workers — edge runtime
  • Cloudflare Browser Rendering — headless Chrome

Architecture

src/
├── cf-worker.ts              # Worker entry point
├── mcp.ts                    # MCP server entry point
├── cli.ts                    # CLI (unsurf search/lookup/publish)
├── domain/                   # Effect Schema types
├── db/                       # Drizzle schema + queries  
├── services/                 # Browser, Store, SchemaInferrer, OpenApiGenerator, Gallery, Directory
├── tools/                    # Scout, Worker, Heal
└── ai/                       # LLM Scout Agent (ScoutAgent, AnthropicProvider)

Directory

The API Directory is a community registry of unsurfed APIs at /directory.

Endpoints

GET    /d/                       # List all fingerprints
GET    /d/:domain                # Get domain info + capabilities  
GET    /d/:domain/:capability    # Get endpoints for capability
GET    /d/:domain/:method/:path  # Get specific endpoint details
GET    /d/:domain/spec           # Get OpenAPI spec
POST   /d/publish                # Publish scouted API to directory
POST   /d/validate               # Validate before publishing
DELETE /d/:domain                # Remove from directory
GET    /search?q=...             # Semantic search across directory

Seeding

Curated seed list at scripts/seed-apis.json. Run seeding script:

bun run scripts/seed.ts

Conventions

  • exactOptionalPropertyTypes: true
  • Biome for lint/format (tabs, 100 width)
  • CI: check → docs → deploy

Read the full file on GitHub · 82 lines

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 · 82 lines · 610 tokens per session scan A 5fc57d97fbe6

Subscribe to this mod's changes

unsurf AGENTS.md is an instructions file published in the GitHub repository acoyfellow/unsurf (21 stars, last pushed 4mo ago), licensed MIT. It adds 610 tokens to every session, about $0.0024 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.

Related

unsurf AGENTS.md compared with instructions from other repositories

unsurf AGENTS.md next to 6 instructions from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
unsurf AGENTS.mdacoyfellow/unsurfInstructions file214mo agoMITA610Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscodeInstructions file195kyesterdayMITA9,719GitHub Copilot
next.js AGENTS.mdvercel/next.jsInstructions file143kyesterdayMITA7,461Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchainInstructions file149kyesterdayMITA4,680Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscodeInstructions file195kyesterdayMITA5,516GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscodeInstructions file195kyesterdayMITA3,093GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harnessInstructions file274k2d agoMITA4,313Codex, OpenCode