Module emission 

Parse the model’s raw reply into a structured Emission.

Three shapes (matching the failure-mode taxonomy in ~/workspaces/knowledge/board/drake/2026-05-29_newt-coder-failure-mode-taxonomy.md):

• Emission::WholeFiles — one or more FILE: <path>\n…\nEND-FILE blocks. The S5 directive’s preferred shape.
• Emission::UnifiedDiff — a unified diff (fenced or not). Legacy path; useful when a model ignores the directive but still lands a valid hunk.
• Emission::Prose — nothing structured was found. The model emitted text only. Failure mode T0a in the taxonomy.

The parser is permissive. Real Ollama replies often arrive wrapped in stray ``` fences or with a leading “Here’s the updated file:” preamble — strip_outer_fences peels a single enclosing fence and try_parse_whole_files is tolerant of interleaved blank lines. We’d rather extract a valid emission from a slightly-malformed reply than crash on it.

Enums

Emission

Functions

normalize_emission

Parse raw into an Emission. Permissive: peels a single enclosing ``` fence before deciding, then tries each shape in preference order (whole-files > unified-diff > prose).