[woksin]

Changed

• The model-first Library sample now declares BookAddedToCatalog inline with produces event. It also has a rejection specification for an empty author name, so every validation rule has an example. (Library sample: inline produces event, and a rejection spec for every validation rule #630)

[woksin]

Reviewer notes

• Quick review (Opus 5.5) with the security lens on 6890026: passed, no findings.
• Local checks: dotnet screenplay ModelFirst/Library/library.play --warnaserror (0 diagnostics), dotnet screenplay test (3/3 specifications), yarn samples:validate, and a Release restore and build of Samples.slnx all passed.
• Not run locally: the whole-solution spec run hit its time limit because it needs a running Chronicle (OAuth token fetch failed to connect). That coverage comes from CI. The change touches only the .play model and its README.