fix: add mcp case to source format conversion switch

[khaliqgant]

User description

Summary

• MCP packages failed when using --as flag (e.g. prpm install @agent-relay/relaycast-mcp-server --as codex) with error: "Unsupported source format for conversion: mcp"
• Added missing case 'mcp': to the source format parsing switch, using fromMCPServer to convert MCP server JSON into canonical format
• Also added fromMCPServer to the imports from @pr-pm/converters

Test plan

• Run prpm install @agent-relay/relaycast-mcp-server --as codex and verify it installs successfully
• Run prpm install @agent-relay/relaycast-mcp-server --as claude and verify conversion works
• Verify existing MCP native installs (without --as) still work

🤖 Generated with Claude Code

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CodeAnt-AI Description

Add MCP format conversion to enable --as installs

What Changed

• MCP server packages can now be converted when installing with the --as option; previously they failed with "Unsupported source format for conversion: mcp"
• The MCP conversion function is imported and used to parse MCP server JSON into the canonical package format during install

Impact

✅ Successful MCP installs using --as
✅ Converted MCP server packages available for target formats
✅ Fewer install failures for MCP sources

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[my-senior-dev-pr-review]

🤖 My Senior Dev — Analysis Complete

👤 For @khaliqgant

📁 Expert in packages/ (211 edits) • ⚡ 7th PR this month

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📊 1 file reviewed • 1 high risk • 3 need attention

⚠️ Needs Attention:

• packages/cli/src/commands/install.ts — Potentially introduces a new data handling process that may involve user-inputted JSON and has implications for security, error handling, and input validation.

📚 Relevant Past Discussions:

• ⚠️ Unresolved discussions on install.ts — 10 unresolved comments on this file from past PRs

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[codeant-ai]

Sequence Diagram

This PR fixes install conversion for MCP packages when using the as flag. The CLI now recognizes mcp as a valid source format, converts it into canonical form, and continues normal target format conversion.

sequenceDiagram
    participant User
    participant CLI
    participant PackageSource
    participant Converters

    User->>CLI: Install MCP package with as target
    CLI->>PackageSource: Fetch package source and metadata
    PackageSource-->>CLI: Return mcp source content
    CLI->>Converters: Convert mcp source to canonical package
    CLI->>Converters: Convert canonical package to target format
    CLI-->>User: Complete install successfully

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Generated by CodeAnt AI

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No issues found across 1 file

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Nitpicks 🔍

🔒 No security issues identified

⚡ Recommended areas for review Import contract Confirm that fromMCPServer is exported with the expected signature from @pr-pm/converters and that it expects a parsed object (not a raw string). If fromMCPServer expects a validated/typed object, the code should parse/validate input using the shared parser rather than a raw JSON.parse. Parsing assumption The conversion branch for mcp calls JSON.parse(sourceContent) unconditionally. Validate that sourceContent is actually JSON text (single-file packages) and not another file type or already-parsed object. Consider using existing MCP JSON parsing utilities to provide better validation and clearer error messages for malformed MCP packages.

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