- code-shaped fixture set: writer + validator template kinds over one
composed partial, no-op escaper, strict mode, all public API
- ADR-004 mappings in builder Rust (kind->call names, struct name,
string-kind flag, source-quoted literals); templates stay dumb
- document order (not sort/hash/reverse) drives rendered order;
reordered arrays render in the array's new order
- determinism: byte-identical across repeated renders, registry
rebuilds, differing registration orders, fresh contexts, and both
sinks (render vs render_to_write)
- banner stays an emit-layer obligation; no banner assertions in the
proof (gap recorded in task Notes, honestly)
Verification: cargo test (38 passed), cargo clippy --all-targets --
-D warnings, cargo fmt --check, taskgraph validate
