MIME Types and File Extensions

MIME Types

Format	MIME Type
MRS-S	`application/vnd.mrs+sexpr`
Working Set Envelope	`application/vnd.mrs+sexpr`

Format	Extension
MRS-S	`.mrs` or `.mrs-s`
Working Set Envelope	`.mrs-work` (typically ephemeral)

Note: Working Set Envelopes are typically not persisted to files—they exist as in-memory structures passed between orchestrator and agents.

MRS documents MUST be encoded in UTF-8. The BOM (Byte Order Mark) SHOULD NOT be used.

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