🧾 MIME Type for LLMFeed – `application/llmfeed+json`

🎯 Purpose

Define and promote a dedicated MIME type for .llmfeed.json and .llmfeed-lite.json files:

Content-Type: application/llmfeed+json

This type enables smarter handling of LLM-specific context feeds by:

• AI agents
• HTTP APIs
• developer tools
• browsers

📦 What is a MIME type?

A MIME (Multipurpose Internet Mail Extensions) type tells systems how to interpret a file based on its content and purpose.

For example:

• application/json → raw JSON
• application/xml → structured XML
• text/html → web page

LLMFeed now defines its own specialized format: application/llmfeed+json

🧠 Why `application/llmfeed+json` matters

• Lets LLMs recognize a context file on sight
• Allows VSCode extensions and syntax highlighters to activate
• Enables secure and accurate routing of LLM feeds via APIs
• Makes .llmfeed.json indexable by feed-aware search tools

🛠 Usage examples

In HTTP headers (APIs or static files)

Content-Type: application/llmfeed+json

In Node.js (Express)

res.setHeader("Content-Type", "application/llmfeed+json");

In a `curl` upload

curl -H "Content-Type: application/llmfeed+json" -d @llmfeed.json https://api.agent.com/context

📍 Scope of use

• .llmfeed.json (full version)
• .llmfeed-lite.json (simplified version)
• future .llmfeed.v2.json versions

⚠️ This type should only be used for LLM context capsules following the standard defined at wellknownmcp.org .

📬 Registration (future)

This MIME type will be submitted to IANA for official registry as adoption grows.

Proposed by: wellknownmcp.org
Contact: opensource@wellknownmcp.org