build_mpack function

COUPLING PARTNERS

Co-modified in the same commits

• .windsurfrules
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• AGENTS.md Workspace — Shared Agent Configuration
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• AGENTS.md Workspace — Shared Agent Configuration.Merge Conflicts — Read Both Sides, Use muse resolve
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• AGENTS.md Workspace — Shared Agent Configuration.Merge Conflicts — Read Both Sides, Use muse resolve.code
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• AGENTS.md Workspace — Shared Agent Configuration.Merge Conflicts — Read Both Sides, Use muse resolve.code[bash]
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• AGENTS.md Workspace — Shared Agent Configuration.Merge Conflicts — Read Both Sides, Use muse resolve.⚠️ Never blindly use --ours or --theirs
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• docs/
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• docs/guide/
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• docs/reference/
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• muse/
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• muse/cli/
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• muse/cli/commands/
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• muse/cli/commands/branch.py _PruneConfigJson
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• muse/cli/commands/branch.py::import MsgpackDict
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• muse/cli/commands/branch.py::import short_id
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