serde_json

Standard JSON (de)serializer for serde-derived types. Used for the word-analysis cache sidecar (crates/word-analysis/src/cache.rs) and to parse Ollama's JSON response envelope plus the model's own JSON reply nested inside it (ollama.rs). Chosen because trango already uses serde, and it's what ureq's json feature uses internally.

Pitfall

AnalysisCache::entries is HashMap<u32, WordAnalysis> — serde_json stringifies integer map keys, so the file's entries keys read as "0", "1", ... by hand, though it round-trips fine.