WhatsNew: rt.1 — roundtrip safety net landed

2026-05-12 09:32:11 +02:00
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@@ -54,3 +54,13 @@ Milestone-close audit done. The compile-time regression that surfaced after the
 One unrelated grammar stub in the language reference (left over from a doc consolidation two days ago) was caught by the audit drift-review and fixed in the same pass.

 Milestone 23 is officially closed. Queue is back to user-direction.
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+## 2026-05-12 — Roundtrip safety net for the two program forms
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+AILang now ships with a continuous safety net that verifies the two program forms (the structured form and the textual form) stay losslessly interchangeable. Three checks run on every build:
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+- Every example in the corpus round-trips between the two forms with byte-identical canonical output.
+- Every language construct is required to have at least one example exercising it; coverage gaps fail the build.
+- The command-line render/parse flow preserves canonical bytes end-to-end, verified by a hash check.
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+All three pass first time on the current corpus — the two forms are exactly equipotent today, no expressive-power gap between them. This is the prerequisite for the cross-model authoring test that was deferred earlier; the language can now go into that test on solid ground.