Re-derives the deferred iters 24.2 (class Show + 4 prim instances)
and 24.3 (print free fn + E2E) against the post-mq architecture.
Iter 24.1 shipped at f38bad8 and is unchanged. The supersedes-note
in the spec frontmatter explains the relation to the predecessor at
docs/specs/2026-05-12-24-show-print.md.
Substantive deltas vs. predecessor:
- Dispatch routing through the mq.2/.3 5-step rule; constraint-driven
filter (mq.tidy T1) is load-bearing for show calls inside print's
body.
- 24.2 grows to include the 22b-Show -> TShow/tshow migration
(~14 fixtures + 2 Rust test files) to eliminate post-prelude.Show
ambiguity, analogous to the existing TEq/TOrd convention.
Grounding-check PASS (re-dispatched after two LBA path corrections;
12 load-bearing assumptions all ratified).
Brummel
d6d70bd06c