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feat: add UV runtime support in manifest v0.4

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Add UV as a new server type for Python extensions that use UV runtime
for dependency management instead of bundling dependencies.

Schema changes (v0.4):
- Add "uv" to server.type enum
- Make mcp_config optional (not needed for UV type)
- UV extensions rely on pyproject.toml for dependencies

Documentation:
- Add UV runtime section to MANIFEST.md explaining benefits and usage
- Update README.md to recommend UV runtime for Python
- Add complete hello-world-uv example

Benefits of UV runtime:
- Cross-platform support (Windows/macOS/Linux, Intel/ARM)
- Small bundle size (~100 KB vs 5-10 MB)
- Handles compiled dependencies portably
- No user Python installation required

Example manifest:
{
  "manifest_version": "0.4",
  "server": {
    "type": "uv",
    "entry_point": "src/server.py"
  }
}

Co-authored-by: Joan <joan@anthropic.com>
This commit is contained in:
Joan Xie 2025-11-12 20:27:24 -08:00
commit d90365e626
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376
schemas/mcpb-manifest-v0.4.schema.json Normal file
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{
"type": "object",
"properties": {
"$schema": {
"type": "string"
},
"dxt_version": {
"type": "string",
"const": "0.4",
"description": "@deprecated Use manifest_version instead"
},
"manifest_version": {
"type": "string",
"const": "0.4"
},
"name": {
"type": "string"
},
"display_name": {
"type": "string"
},
"version": {
"type": "string"
},
"description": {
"type": "string"
},
"long_description": {
"type": "string"
},
"author": {
"type": "object",
"properties": {
"name": {
"type": "string"
},
"email": {
"type": "string",
"format": "email"
},
"url": {
"type": "string",
"format": "uri"
}
},
"required": [
"name"
],
"additionalProperties": false
},
"repository": {
"type": "object",
"properties": {
"type": {
"type": "string"
},
"url": {
"type": "string",
"format": "uri"
}
},
"required": [
"type",
"url"
],
"additionalProperties": false
},
"homepage": {
"type": "string",
"format": "uri"
},
"documentation": {
"type": "string",
"format": "uri"
},
"support": {
"type": "string",
"format": "uri"
},
"icon": {
"type": "string"
},
"icons": {
"type": "array",
"items": {
"type": "object",
"properties": {
"src": {
"type": "string"
},
"size": {
"type": "string",
"pattern": "^\\d+x\\d+$"
},
"theme": {
"type": "string",
"minLength": 1
}
},
"required": [
"src",
"size"
],
"additionalProperties": false
}
},
"screenshots": {
"type": "array",
"items": {
"type": "string"
}
},
"localization": {
"type": "object",
"properties": {
"resources": {
"type": "string",
"pattern": "\\$\\{locale\\}"
},
"default_locale": {
"type": "string",
"pattern": "^[A-Za-z0-9]{2,8}(?:-[A-Za-z0-9]{1,8})*$"
}
},
"required": [
"resources",
"default_locale"
],
"additionalProperties": false
},
"server": {
"type": "object",
"properties": {
"type": {
"type": "string",
"enum": [
"python",
"node",
"binary",
"uv"
]
},
"entry_point": {
"type": "string"
},
"mcp_config": {
"type": "object",
"properties": {
"command": {
"type": "string"
},
"args": {
"type": "array",
"items": {
"type": "string"
}
},
"env": {
"type": "object",
"additionalProperties": {
"type": "string"
}
},
"platform_overrides": {
"type": "object",
"additionalProperties": {
"type": "object",
"properties": {
"command": {
"$ref": "#/properties/server/properties/mcp_config/properties/command"
},
"args": {
"$ref": "#/properties/server/properties/mcp_config/properties/args"
},
"env": {
"$ref": "#/properties/server/properties/mcp_config/properties/env"
}
},
"additionalProperties": false
}
}
},
"required": [
"command"
],
"additionalProperties": false
}
},
"required": [
"type",
"entry_point"
],
"additionalProperties": false
},
"tools": {
"type": "array",
"items": {
"type": "object",
"properties": {
"name": {
"type": "string"
},
"description": {
"type": "string"
}
},
"required": [
"name"
],
"additionalProperties": false
}
},
"tools_generated": {
"type": "boolean"
},
"prompts": {
"type": "array",
"items": {
"type": "object",
"properties": {
"name": {
"type": "string"
},
"description": {
"type": "string"
},
"arguments": {
"type": "array",
"items": {
"type": "string"
}
},
"text": {
"type": "string"
}
},
"required": [
"name",
"text"
],
"additionalProperties": false
}
},
"prompts_generated": {
"type": "boolean"
},
"keywords": {
"type": "array",
"items": {
"type": "string"
}
},
"license": {
"type": "string"
},
"privacy_policies": {
"type": "array",
"items": {
"type": "string",
"format": "uri"
}
},
"compatibility": {
"type": "object",
"properties": {
"claude_desktop": {
"type": "string"
},
"platforms": {
"type": "array",
"items": {
"type": "string",
"enum": [
"darwin",
"win32",
"linux"
]
}
},
"runtimes": {
"type": "object",
"properties": {
"python": {
"type": "string"
},
"node": {
"type": "string"
}
},
"additionalProperties": false
}
},
"additionalProperties": false
},
"user_config": {
"type": "object",
"additionalProperties": {
"type": "object",
"properties": {
"type": {
"type": "string",
"enum": [
"string",
"number",
"boolean",
"directory",
"file"
]
},
"title": {
"type": "string"
},
"description": {
"type": "string"
},
"required": {
"type": "boolean"
},
"default": {
"anyOf": [
{
"type": "string"
},
{
"type": "number"
},
{
"type": "boolean"
},
{
"type": "array",
"items": {
"type": "string"
}
}
]
},
"multiple": {
"type": "boolean"
},
"sensitive": {
"type": "boolean"
},
"min": {
"type": "number"
},
"max": {
"type": "number"
}
},
"required": [
"type",
"title",
"description"
],
"additionalProperties": false
}
},
"_meta": {
"type": "object",
"additionalProperties": {
"type": "object",
"additionalProperties": {}
}
}
},
"required": [
"name",
"version",
"description",
"author",
"server"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}