First library, its tested and working

docs/VALIDATION.md

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+# Snapshot validation
+
+- Export generator completed: 99 objects, no ModbusFB references.
+- Public diagnostics and balanced VAR declaration checks passed.
+- Strict host C compilation passed.
+- Bridge pool/stale handle/configuration/shutdown tests passed.
+- Nine TCP scenarios passed directly and through the native bridge.
+- RTU pseudo-terminal tests passed, including CRC/timeout recovery, partial frames,
+  writes, exceptions and invalid write echo recovery.
+- TCP slave FC 1/2/3/4/5/6/15/16, exception, nonzero base, listener recovery
+  and stale handle tests passed.
+
+No CODESYS IDE compile, full ARM64 SDK build, physical serial hardware test,
+or online-change qualification was performed for this repository package.