docs(metatype): refresh PLAN Status — surface complete, 0141 deferred

current/PLAN-METATYPE.md

@@ -107,20 +107,31 @@ while red. Examples: `06xx` (comptime), `11xx` (diagnostics).
       before the body lowers). `examples/0618` (recursive `*List`: construct, match
       through the pointer, recursive traversal). Mutual recursion / by-value-self-ref
       rejection fall out of the same mechanism (F5 adds the loud by-value check).
-- [ ] **`make_enum(variants: []EnumVariant)`** sx helper over a COMPUTED
+- [x] **`make_enum(name, variants: []EnumVariant)`** — the general enum constructor
-      (non-literal) variant list — exercises the interpreter decoding a value-arg
+      over a COMPUTED (value, non-literal) variant list. Pure sx in `meta.sx`;
-      slice in `define`.
+      exercises `define` decoding a value-arg slice. `examples/0620` (array-literal
-- [x] **`type_info($T) -> TypeInfo`** (enum-only) — reflect an `enum`/`tagged_union`
+      local) / `0624` (generic builder).
-      INTO a value (inverse of `define`'s decode): `interp.zig:reflectTypeInfo`
+- [x] **Comptime slice over a non-string aggregate** — `arr[lo..hi]` over an array
-      constructs the `.enum(EnumInfo{ variants })` Value `defineEnum` decodes, so
+      yields a real slice value at comptime (`base_ty` threaded onto `Subslice`;
-      `define(declare(n), type_info(T))` round-trips. `examples/0619`. Non-enum args
+      open-ended `hi` folded to the array's static length; `subsliceElements`).
-      rejected loudly at lower time. **Still pending:** widen `TypeInfo` past
+      `examples/0621`.
-      `` `enum `` (struct/tuple variants) + the matching `define` decode arms.
+- [x] **`type_info($T) -> TypeInfo`** — reflect `enum`/`tagged_union`/`struct`/`tuple`
-- [~] **Validation + loud diagnostics** — by-VALUE self-reference DONE
+      INTO a value (inverse of `define`'s decode); `define` decodes all three back
-      (`checkInfiniteSize` Pass 1g: loud "infinitely sized" diagnostic + cycle
+      (`defineEnum`/`defineStruct`/`defineTuple`, dispatched on the TypeInfo tag).
-      break, covers source + comptime types; `examples/1178`, issue 0139 resolved).
+      Round-trips: `examples/0619` (enum) / `0622` (struct) / `0623` (tuple). The
-      Still pending: duplicate variant names, a `declare()` never `define()`d
+      reflect/construct triad is complete.
-      (hard error), use-before-define.
+- [x] **Generic type-fn body locals** — a generic `($T) -> Type` comptime-evaluates
+      its FULL body (prelude statements + return), so a local before the return
+      resolves (`createComptimeFunctionWithPrelude` / `evalComptimeTypeBody`).
+      `examples/0624`.
+- [x] **Validation + loud diagnostics** — by-value self-reference (`checkInfiniteSize`,
+      source `1178` + constructed `1182`; issue 0139), duplicate variant/field names
+      (`1180`), `declare()` never `define()`d (`1181`, was a `verifySizes` panic),
+      and the 0140 bail-surfacing (`1179`). use-before-define is subsumed by these
+      (no new check needed). Validation story COMPLETE.
+- [ ] **Comptime `List` growth** (issue 0141, DEFERRED) — `List(T).append` at
+      comptime bails (two layers: null comptime allocator at scanDecls + `*T`
+      slot_ptr `struct_get`). Non-blocking; array-literal locals cover the use case.
 
 ## Risks / watch