WhatsNew: cross-model authoring test landed — first data point

Mirrors verbatim the done-state notification sent at milestone close. Single-subject scope; multi-subject expansion queued.
2026-05-12 12:22:08 +02:00
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@@ -72,3 +72,7 @@ The roundtrip-safety-net milestone is done. The two program forms — the struct
 No language behaviour changed; the corpus already satisfied the property. The milestone made it explicit and locked in against future drift.

 Bench all-green. Roadmap is back to user-direction; the Show+print rewire is gated on the heap-string runtime work.
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+## 2026-05-12 — Cross-model authoring test: first data point
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+Cross-model authoring test landed. First run (Qwen3-Coder-Next, 4 tasks, two blind cohorts): textual-form cohort 2/4 green at ~half the token cost; structured-form 1/4. Only first-attempt success was textual-form on a print-two-integers task — five lines vs twenty-three. Recorded as a data point in the language reference; single-model scope explicit. Multi-subject expansion queued as next experimental milestone. Milestone closed; queue back to user-direction.