zerodds-ast-layout

Where a member sits, and what frames it.

Wire layout planning over the common AST: alignment, extent, header framing and offsets, computed per (encoding, endianness, purpose). Every difference between XCDR1 and XCDR2, between a plain and a delimited stream, between a payload and a KeyHash, is a different plan over the same model.

This crate never moves sample bytes. A codec executes the plan; the plan is data. That separation is why twenty-one language columns can be compared against each other: they all execute the same plan, so a disagreement is theirs and not the plan's.

The dialect axes live in key.rs — one named value per question the vendors answer differently.

See docs/specs/zerodds-ast-1.0.md §7.