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Long-form decision records and design docs.

Updated Jun 9, 2026

Designs ​

Long-form decision records and design docs that don't fit in source comments or a CHANGELOG - the kind of intent future-us (or future-Claude) will need to reconstruct.

The house style is condensed Oxide-RFD: model + invariants + determinations + tables, light on prose. Each doc stands alone; treat the subtrees as cohesive sets, not chapters that have to be read in order.

Anatomy of an Olly design doc ​

Every doc in this section is built from the same five canonical sections, in this order:

  • Context - what problem we're solving and why now.
  • Model - the entities, relationships, and operations under discussion (tables and diagrams, not prose).
  • Invariants - the things that must remain true regardless of implementation.
  • Determinations - the decisions we've actually made, each with its rationale.
  • Open questions - what we deliberately haven't decided yet, and what would unblock those choices.

Keep the prose thin. If a determination can be a row in a table, make it a row in a table.

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