Precision at every
keystroke.
Lapidary is a house of focused .NET tools. Querent brings a T-SQL engine and language server and remains source-only; Tessera is a spreadsheet engine for XLSX, XLSB, and legacy XLS. Tessera 2026.8.0-alpha.1 is a built and verified release candidate. It is not published.
One release candidate, one in preparation, one parked.
The public story follows the code: what is being tested, what is not ready, and where the boundaries are.
Querent
A composable T-SQL parser, completion engine, formatter, analyzer, SQL Server catalog loader, and language-server prototype.
Tessera
A .NET library family for XLSX, XLSB, legacy XLS conversion, templating, EPPlus migration, and shared Open XML packaging.
Sluice
Development is on hold while the ingestion core and end-to-end provider coverage are rebuilt. It is not part of this release.
How every stone is cut
The reason these tools feel different in the hand.
Focused
Small, composable packages with explicit format and host boundaries.
Adversarially tested
Property tests, malformed-input cases, cross-validation, and real-world corpora shape the release gate.
Local by design
The core libraries run in your process. Networked catalog access is explicit and documented as a trust boundary.
Evidence first
Preview claims stay narrow until packages, compatibility tests, and approved terms support them.
Cut something fine.
Review the release boundaries and the evaluation terms, then follow the release status as the candidate is validated.