go: Phase 7 generics closed — types 102/102, +30 cleared, total 556/556 [shapes-static-types-bidirectional]

Canonical generic functions: Map, Filter, Reduce, First end-to-end
type-check + run. Plus 20+ typer-only shape tests covering Apply,
Compose, ToMap, Swap, Box, Triple, ToSlice, Take, Send, Fill, Eq,
Values, Pair, Inspect, etc. Index synth (slice/array/map →
element type) added to typer.

v0 limitations stamped in tests: SX `/` is float (no int mod
emulation), `var r []T` indistinguishable from unbound, single-name
constraints opaque (no type-set arithmetic).

Shape locked in: "the parser recognizes shapes, the validator
recognizes roles." Same AST + different role-validators = different
guest semantics. Diary documents this as the lemma the kit should
extract — three deliverables (binding-groups, control-flow sentinels,
index synthesis) now all instantiate it.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

lib/go/scoreboard.md

@@ -1,13 +1,13 @@
 # Go-on-SX Scoreboard
 
-**Total: 527 / 527 tests passing**
+**Total: 556 / 556 tests passing**
 
 |  | Suite | Pass | Total |
 |---|---|---|---|
 | ✅ | lex | 129 | 129 |
 | ✅ | parse | 179 | 179 |
-| ✅ | types | 77 | 77 |
-| ✅ | eval | 102 | 102 |
+| ✅ | types | 102 | 102 |
+| ✅ | eval | 106 | 106 |
 | ✅ | runtime | 40 | 40 |
 | ⬜ | stdlib | 0 | 0 |
 | ⬜ | e2e | 0 | 0 |