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name: Matrix Repomix description: This skill should be used when the user asks to "pack repository", "repomix", "fetch external code", "pack github repo", "get code from repository", or needs to pack external repositories for context analysis. user-invocable: true allowed-tools:

• mcp__plugin_matrix_matrix__matrix_repomix

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Matrix Repomix

Pack external repositories for context using a two-phase flow that minimizes token consumption.

Usage

Use the matrix_repomix MCP tool with the target repository and query.

Phase 1: Index (No Tokens)

Call with target and query to get file suggestions:

Copytarget: "anthropics/anthropic-cookbook"
query: "tool use implementation"

Returns suggested files with token estimates. Ask the user to confirm before proceeding.

Phase 2: Pack (With Confirmation)

After user confirms, call again with confirmedFiles:

Copytarget: "anthropics/anthropic-cookbook"
query: "tool use implementation"
confirmedFiles: ["path/to/file1.py", "path/to/file2.py"]

Parameters

• target (required) - GitHub shorthand (owner/repo) or local path
• query (required) - What implementation to search for
• branch - Git branch (default: HEAD)
• confirmedFiles - Files to pack (from Phase 1)
• maxTokens - Maximum tokens for output (default: 30000)
• maxFiles - Maximum files to suggest (default: 15)
• cacheTTLHours - Cache duration (default: 24)

Key Features

• Query-first semantic search using Matrix embeddings
• Token estimates BEFORE consumption
• Smart exclusions (tests, docs, configs, node_modules)
• GitHub API for file tree (no content fetch until pack)
• 24h cache for index, configurable for pack results