feat(mcp)!: accept host implementation and logger options - #54
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mcpserver.New now requires Options as a third argument so hosts can advertise application identity and supply a slog logger. A nil Implementation keeps Name "codemode" and Version "2".
This was referenced Sep 11, 2026
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Change
Allow hosts to supply MCP implementation metadata and SDK diagnostics through required construction options. Migrate every example and callsite; preserve the three-tool surface and existing authorization/error boundaries.
Verification
An isolated executable verified custom name/title/version over MCP initialization, host logger output, and real worker-backed composition returning 6. Local root:check is running; CI must pass before merge.
Compatibility
New now requires a third Options argument. Options{} retains the library identity and SDK logger defaults.