agentmods.dev

mcp-crawl4ai-ts: Instructions file for GitHub Copilot

.github/copilot-instructions.md

mcp-crawl4ai-ts copilot-instructions.md is an instructions file for GitHub Copilot from omgwtfwow/mcp-crawl4ai-ts. It costs 1,163 tokens per session, scanned A, original, MIT.

Project-specific instructions for developing mcp-crawl4ai-ts, a TypeScript server that exposes web-crawling tools. They describe its files, request validation, browser sessions, and error handling.

In plain words
What is it for?
Use them when modifying the server, crawling service, tool handlers, validation schemas, or persistent browser-session logic.
Why use it?
They help coding agents change the project without breaking its expected error messages, tests, or separation between server, service, and handler code.

Instructions file for GitHub Copilot

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

This is omgwtfwow/mcp-crawl4ai-ts's own configuration. It tells GitHub Copilot how to work on mcp-crawl4ai-ts 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 mcp-crawl4ai-ts configures →

not rated 13repo 1y ago A scan 1,163 tokens original MIT
View source ↗ omgwtfwow/mcp-crawl4ai-ts
Reuse

Borrowing it

Nothing to install: this file belongs to omgwtfwow/mcp-crawl4ai-ts. 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/omgwtfwow/mcp-crawl4ai-ts/main/.github/copilot-instructions.md
Clone the repo
git clone --depth 1 https://github.com/omgwtfwow/mcp-crawl4ai-ts

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 mcp-crawl4ai-ts copilot-instructions.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/omgwtfwow/mcp-crawl4ai-ts/copilot-instructions/github.svg)](https://agentmods.dev/instructions/omgwtfwow/mcp-crawl4ai-ts/copilot-instructions)
Your own site
<a href="https://agentmods.dev/instructions/omgwtfwow/mcp-crawl4ai-ts/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/omgwtfwow/mcp-crawl4ai-ts/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 mcp-crawl4ai-ts copilot-instructions.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/omgwtfwow/mcp-crawl4ai-ts/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/omgwtfwow/mcp-crawl4ai-ts/copilot-instructions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 1,163 This file is loaded in full into every session.
When invoked 1,163 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 $0.01163 $0.01163
Opus 5.5 $0.00465 $0.00465
Sonnet 5.5 $0.00233 $0.00233
Haiku 4.5 $0.00116 $0.00116

Measured 2mo ago against content hash 788967f5b1ac, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mcp-crawl4ai-ts 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 · 61 lines

How it starts

The opening of the file, as written. The whole thing — 61 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Copilot Instructions: mcp-crawl4ai-ts

Concise, project-specific guidance for AI coding agents. Optimize for correctness, safety, and existing test expectations.

Architecture & Flow

  • Entrypoint src/index.ts: loads dotenv only if CRAWL4AI_BASE_URL unset; fails fast if missing. Passes env + version into Crawl4AIServer.
  • src/server.ts: registers MCP tools, keeps a Map<string, SessionInfo> for persistent browser sessions, and uses validateAndExecute (Zod parse + invariant error message format). Do NOT alter error text pattern: Invalid parameters for <tool>: ... (tests & LLM reliability depend on it).
  • Service layer src/crawl4ai-service.ts: pure HTTP wrapper around Crawl4AI endpoints; centralizes axios timeout & error translation (preserve wording like Request timed out, Request failed with status <code>: — tests rely on these substrings).
  • Handlers (src/handlers/*.ts): orchestration & response shaping (text content arrays). No direct business logic inside server class beyond wiring.
  • Validation schemas (src/schemas/validation-schemas.ts + helpers): all tool inputs defined here. Use createStatelessSchema for stateless tools; session/persistent tools have discriminated unions.

Tool Model

  • Stateless tools (e.g. get_markdown, capture_screenshot, execute_js) spin up a fresh browser each call.
  • Session-based operations use manage_session (create/list/clear) + crawl for persistent state, allowing chained JS + screenshot/pdf in ONE call. Never try to chain separate stateless calls to reflect JS mutations.
  • Output always returned as base64/text blocks; do not add file system side-effects unless explicitly using a save path param already supported (screenshots: optional local save dir).

JS & Input Validation Nuances

  • JS code schema rejects: HTML entities ("), literal \n tokens outside strings, embedded HTML tags. Reuse JsCodeSchema—do not duplicate logic.
  • For get_markdown: if filter is bm25 or llm, query becomes required (enforced via .refine). Keep this logic centralized.

Read the full file on GitHub · 61 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 · 61 lines · 1,163 tokens per session scan A 788967f5b1ac

Subscribe to this mod's changes

mcp-crawl4ai-ts copilot-instructions.md is an instructions file published in the GitHub repository omgwtfwow/mcp-crawl4ai-ts (13 stars, last pushed 1y ago), licensed MIT. It adds 1,163 tokens to every session, about $0.0047 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.

Backend and APIsBrowser automationcrawl4aimcpmcp-server
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