Initial commit -- did OMO do a good job?

2026-09-01 18:29:46 -04:00
commit 20a6c26f7c
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+## Todo 2 — news-core domain types
+
+Command: `cargo test -p news-core`
+
+```
+$ cargo test -p news-core
+    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
+     Running unittests src/lib.rs (target/debug/deps/news_core-73165881e402db9b)
+
+running 2 tests
+test model::tests::opinion_item_serializes_kind_as_snake_case_discriminant ... ok
+test model::tests::round_trip ... ok
+
+test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+
+   Doc-tests news_core
+
+running 0 tests
+
+test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+```
+
+- `round_trip` covers all 5 types (`Source`, `RawItem`, `StoryCluster`,
+  `ScoreBreakdown`, `Feedback`): serialize with `serde_json::to_string`,
+  deserialize back, `assert_eq!(decoded, original)` via `pretty_assertions`.
+- `opinion_item_serializes_kind_as_snake_case_discriminant` locks the wire
+  format: a `RawItem` with `kind: ItemKind::Opinion` serializes the
+  discriminant as the literal string `"opinion"`.
+
+Also verified clean (not required by acceptance criteria but run as part of
+the post-write review loop):
+
+```
+$ cargo fmt --all --check        # exit 0
+$ cargo clippy -p news-core --all-targets -- -D warnings   # exit 0, no warnings
+$ cargo build --workspace        # exit 0, all 6 crates compile
+```