claude@clouddev1
5438ba6a47
Decides the architecture for SQL in advanced mode (Q1/Q2/Q4): SQL is authored as grammar within the unified grammar tree (ADR-0024) and parsed by the existing walker — not a separate batch parser — so SQL gets the same completion, highlighting, hints, and parse-error reporting as the DSL. Mode gates the SQL forms. DDL routes through the typed Command executor (metadata and the playground type vocabulary preserved); DML and SELECT execute as validated SQL. Engine-neutral posture; DSL→SQL teaching echo; phased plan. Supersedes ADR-0001's sqlparser-rs reservation. Ticks Q4; updates the ADR index and the Q1/Q2 notes. handoff-24 orients the implementation session at Phase 1.