The Final Bit of Engine in Place

Today, hierarchical key signature overrides were completed. Global key signatures can now be overridden at the instrument level as well as the staff level, as many times within a measure as required, with fully deterministic accidental handling. The updated ADR-0035 documents the algorithm.

This sounds narrow. It isn't. The ability to handle this correctly, without manual intervention or heuristic guesswork, required everything underneath it to be correct first. The last piece going in means the semantic aspect of the engine is complete.

Eighteen months of invisible work, ended.

The focus now shifts to the frontend event system, then to opening windows, etc. The infrastructure phase succeeded by disappearing; the next phase will succeed by appearing. Different disciplines, different anxieties.

I find it difficult to articulate what this moment feels like. The closest analogy I have is from composition: finishing a score and waiting for the first rehearsal.
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A carefully prepared potentiality, awaiting concretion.