feat(grammar)!: return/resume as diverging prefix exprs + ADR-012 + conflict disclosure (#215)#224
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…onflict disclosure NOT a conflict-count fix (proven net-neutral: 21->21 S/R states). This is a *correctness* change + a settled design decision + honest noise disclosure (#215). - lib/parser.mly: hoist return/resume out of expr_primary to the statement-expression top level. Semantic justification: `return e` has type Never — it never yields a value to an enclosing operator, so it is a diverging *prefix* that greedily owns the rest of the computation, not an operand. BREAKING: `(return a) + b` now needs explicit parens — a feature (post-divergence dead code made visible), in the spirit of affine typing / explicit effect rows. 257 gate green. - ADR-012 (docs/specs/SETTLED-DECISIONS.adoc + .machine_readable/6a2/ META.a2ml): grammar changes are correctness assertions, never cosmetic-metric chasing; residual ~68 S/R + R/R (incl. state 401) are inherent, Menhir-correctly-resolved, intentionally-left won't-fix. - justfile: `just build` masks the benign LALR notices but prints the masked count + correctness proof + ADR pointer + reveal command (`just build-loud`); plain `dune build` unchanged & fully transparent. Masking is disclosure, not concealment. Refs #215 #218 Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Not a conflict-count fix (proven net-neutral). A correctness change + settled design decision + honest noise disclosure.
return/resumehoisted out ofexpr_primary→ diverging prefix expressions (: Never, never an operand). BREAKING:(return a) + bneeds explicit parens (a feature). 257 green.just buildmasks the benign Menhir notices but discloses the count + correctness proof + ADR +just build-loudreveal;dune buildunchanged & transparent. Masking ≠ hiding.Breaking: review-gated. Refs #215 #218