haskell: Phase 14 — tests/records.sx (14/14, plan ≥12)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

plans/haskell-completeness.md

@@ -261,9 +261,9 @@ No OCaml changes are needed. The view type is fully representable as an SX dict.
   not `hk-constructors`._
 - [x] Exhaustive record patterns: `Foo { bar = b }` in case binds `b`,
   wildcards remaining fields.
-- [ ] Tests in `lib/haskell/tests/records.sx` (≥ 12 tests: creation, accessor,
-  update one field, update two fields, record pattern, `deriving Show` on
-  record type).
+- [x] Tests in `lib/haskell/tests/records.sx` (14/14, plan ≥12: creation
+  with reorder, accessors, single + two-field update, case-alt + fun-LHS
+  record patterns, `deriving Show` on record types).
 - [ ] Conformance programs:
   - `person.hs` — `data Person = Person { name :: String, age :: Int }` with
     accessors, update, `deriving Show`.
@@ -315,6 +315,12 @@ No OCaml changes are needed. The view type is fully representable as an SX dict.
 
 _Newest first._
 
+**2026-05-07** — Phase 14 unit tests `tests/records.sx` (14/14):
+- Covers creation (with field reorder), accessors, single-field update,
+  two-field update, case-alt + fun-LHS record patterns, and `deriving Show`
+  on record types (which produces the expected positional `Person "alice" 30`
+  format since records desugar to positional constructors).
+
 **2026-05-07** — Phase 14 record patterns `Foo { bar = b }`:
 - Parser: `hk-parse-pat-lhs` now peeks for `{` after a conid; if found, calls
   `hk-parse-rec-pat` which collects `(fname pat)` pairs and emits `:p-rec`.