plans: tick Phase 10 numerics test file (37/37, plural filename)

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

plans/haskell-completeness.md

@@ -167,9 +167,10 @@ No OCaml changes are needed. The view type is fully representable as an SX dict.
   builtins in the post-prelude block._
 - [x] `Floating` typeclass stub: `pi`, `exp`, `log`, `sin`, `cos`, `(**)`
   (power operator, maps to SX exponentiation).
-- [ ] Tests in `lib/haskell/tests/numeric.sx` (≥ 15 tests: fromIntegral
-  identity, sqrt/floor/ceiling/round on known values, Float literal show,
-  division, pi, `2 ** 10 = 1024.0`).
+- [x] Tests in `lib/haskell/tests/numerics.sx` (37/37 — well past the ≥15
+  target; covers fromIntegral identity, sqrt/floor/ceiling/round/truncate,
+  Float literal show, division/recip/fromRational, pi/exp/log/sin/cos,
+  `2 ** 10 = 1024`. Filename is plural — divergence noted in the plan.)
 - [ ] Conformance programs:
   - `statistics.hs` — mean, variance, std-dev on a `[Double]`. Exercises
     `fromIntegral`, `sqrt`, `/`.
@@ -303,6 +304,12 @@ No OCaml changes are needed. The view type is fully representable as an SX dict.
 
 _Newest first._
 
+**2026-05-07** — Phase 10 numerics test file checkbox (filename divergence):
+- Plan called for `lib/haskell/tests/numeric.sx`. From the very first Phase 10
+  iteration I created `numerics.sx` (plural) and have been growing it. Now
+  at 37/37 — already covers all the categories the plan listed, well past the
+  ≥15 minimum. Ticked the box; left a note about the filename divergence.
+
 **2026-05-07** — Phase 10 Floating stub (pi, exp, log, sin, cos, **):
 - pi as a number constant; exp/log/sin/cos as builtins thunking through to SX
   primitives. `(**)` added as a binop case in `hk-binop` mapping to SX `pow`.