Filed against issue #1 (paideia K7 cubical-Path encoding blocker).
Generalised scope: full HIT support — point + path constructors with
boundary partial-element systems, multi-param schemas, recursive ctor
args. CTypeSchema/CtorSpec/CTypeArg embedded in the mutual inductive
block alongside CType/CTerm. New constructors: CType.ind,
CTerm.{dimExpr, ctor, indElim}, CVal.vctor, CNeu.nIndElim.
Tag layout frozen for REL1; Rust ABI bumps 1→2. Topolei migration
surveyed and documented (§9.1) — ~150–250 lines across DecEq, Trace,
TraceAt, FluxR; Path.lean and EML/Cubical.lean unaffected.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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