Borrowing it
Nothing to install: this file belongs to mnooseman/mcsrc-mcp. 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/mnooseman/mcsrc-mcp/main/.github/instructions/typescript-mcp-server.instructions.mdgit clone --depth 1 https://github.com/mnooseman/mcsrc-mcpWrote 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/mnooseman/mcsrc-mcp/typescript-mcp-server)<a href="https://agentmods.dev/instructions/mnooseman/mcsrc-mcp/typescript-mcp-server"><img src="https://agentmods.dev/badge/instructions/mnooseman/mcsrc-mcp/typescript-mcp-server/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/mnooseman/mcsrc-mcp/typescript-mcp-server"><img src="https://agentmods.dev/badge/instructions/mnooseman/mcsrc-mcp/typescript-mcp-server.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 | $0.01760 | $0.01760 |
| Opus 5.5 | $0.00704 | $0.00704 |
| Sonnet 5.5 | $0.00352 | $0.00352 |
| Haiku 4.5 | $0.00176 | $0.00176 |
Grade A, and why
mcsrc-mcp typescript-mcp-server.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.
This is a copy
100% identical to ssd-ai typescript-mcp-server.instructions.md — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 229 lines — stays where its author put it; the contents beside it link to each section on GitHub.
TypeScript MCP Server Development
Instructions
- Use the @modelcontextprotocol/sdk npm package:
npm install @modelcontextprotocol/sdk - Import from specific paths:
@modelcontextprotocol/sdk/server/mcp.js,@modelcontextprotocol/sdk/server/stdio.js, etc. - Use
McpServerclass for high-level server implementation with automatic protocol handling - Use
Serverclass for low-level control with manual request handlers - Use zod for input/output schema validation:
npm install zod@3 - Always provide
titlefield for tools, resources, and prompts for better UI display - Use
registerTool(),registerResource(), andregisterPrompt()methods (recommended over older APIs) - Define schemas using zod:
{ inputSchema: { param: z.string() }, outputSchema: { result: z.string() } } - Return both
content(for display) andstructuredContent(for structured data) from tools - For HTTP servers, use
StreamableHTTPServerTransportwith Express or similar frameworks - For local integrations, use
StdioServerTransportfor stdio-based communication - Create new transport instances per request to prevent request ID collisions (stateless mode)
- Use session management with
sessionIdGeneratorfor stateful servers - Enable DNS rebinding protection for local servers:
enableDnsRebindingProtection: true - Configure CORS headers and expose
Mcp-Session-Idfor browser-based clients - Use
ResourceTemplatefor dynamic resources with URI parameters:new ResourceTemplate('resource://{param}', { list: undefined }) - Support completions for better UX using
completable()wrapper from@modelcontextprotocol/sdk/server/completable.js - Implement sampling with
server.server.createMessage()to request LLM completions from clients - Use
server.server.elicitInput()to request additional user input during tool execution - Enable notification debouncing for bulk updates:
debouncedNotificationMethods: ['notifications/tools/list_changed'] - Dynamic updates: call
.enable(),.disable(),.update(), or.remove()on registered items to emitlistChangednotifications - Use
getDisplayName()from@modelcontextprotocol/sdk/shared/metadataUtils.jsfor UI display names - Test servers with MCP Inspector:
npx @modelcontextprotocol/inspector
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 First seen · 229 lines · 1,760 tokens per session scan A a3b081f30ef9
mcsrc-mcp typescript-mcp-server.instructions.md is an instructions file published in the GitHub repository mnooseman/mcsrc-mcp (2 stars, last pushed 8mo ago), licensed MIT. It adds 1,760 tokens to every session, about $0.0070 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to ssd-ai typescript-mcp-server.instructions.md, differing in 0 lines, and is treated as a copy.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deno copilot-instructions.md
Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.