defer: 24.2 + 24.3 — Show + print rewire blocked on MethodNameCollision retirement

24.2 plan-recon surfaced a spec-gap: adding `class Show` to the prelude
would collide with the user-class `Show` declared by 14 test fixtures
under examples/test_22b{1,2,3}_*.ail.json (plus hardcoded "Show" /
"show" assertions in crates/ail/tests/typeclass_22b{2,3}.rs) through
the workspace-global method-name-collision pre-pass at
crates/ailang-core/src/workspace.rs:547.

Three resolution paths surfaced: (A) prep-iter rename Show→Render in
fixtures+tests, (B) inline-rename in 24.2 (makes iter bigger),
(C) defer 24.2+24.3 until the P2 milestone "Module-qualified class
names + type-driven method dispatch" retires the MethodNameCollision
workaround. User picked C.

Spec status flips Draft → Partial; the document remains as historical
context for the future re-brainstorm. Iter 24.1 retains as standalone
runtime infrastructure (`bool_to_str` + `str_clone` heap-Str
primitives are user-callable today; they wait for the deferred Show
instances to find their primary caller). Roadmap P1 entry flips
`[ ] → [~]` with `depends on:` line pointing at the P2 milestone.
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# 24 — Show + print rewire — Design Spec
**Date:** 2026-05-12
**Status:** Draft — awaiting user spec review
**Status:** Partial — iter 24.1 shipped 2026-05-12 @ `f38bad8`
(`bool_to_str` + `str_clone` runtime + codegen wiring); iters 24.2
and 24.3 **deferred** on 2026-05-13 pending the retirement of the
`MethodNameCollision` workaround. The deferral was triggered by a
spec-gap surfaced during 24.2 plan-recon: adding `class Show` to
the prelude collides with the user-class `Show` declared by 14
test fixtures under `examples/test_22b{1,2,3}_*.ail.json` (plus
hardcoded `"Show"` / `"show"` assertions in
`crates/ail/tests/typeclass_22b{2,3}.rs`) through the
workspace-global method-name-collision pre-pass at
`crates/ailang-core/src/workspace.rs:547`. Three resolution paths
were surfaced; the user picked "defer until
`MethodNameCollision` retires" per the P2 roadmap entry
"Module-qualified class names + type-driven method dispatch". A
fresh brainstorm re-derives 24.2 + 24.3 from scratch against the
post-retirement architecture; this document remains as historical
context for that re-brainstorm.
**Authors:** Brummel (orchestrator) + Claude
## Goal