plan: iter 23.4 mono-pass unification — 11 tasks, no per-task commits
Plan for the corrected iter 23.4: restructure mono.rs into a single
specialiser for every Type::Forall-quantified Def::Fn (class methods
+ polymorphic free fns) in one fixpoint pass, and remove the codegen-
time specialiser (lower_polymorphic_call + module_polymorphic_fns +
mono_queue) entirely.
11 tasks, 4-step TDD template per task (write-failing-test →
verify-fail → write-impl → verify-pass), no per-task commit step
under the new disc.1 discipline.
Parent spec: docs/specs/2026-05-11-23-eq-ord-prelude.md (re-grounded
2026-05-11 against main HEAD 51da9fa, PASS, 10 load-bearing
assumptions verified).
Open commitments resolved:
- N-ary mono-symbol naming: spec default <name>__<t1>__<t2>__...
- Target-collector: extension of existing collect_mono_targets
(lockstep with collect_residuals_ordered)
- Original poly Def::Fn retention: kept parallel to Def::Class/
Def::Instance
Float-NoInstance diagnostic wording remains deferred to iter 23.5.
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