Two repo-root analyses completing the decision-maker document set:

performance-analysis.md - in-depth comparison vs hand-crafted stored
procedures/triggers/views/functions across four axes (runtime,
write-path, scale, operational), grounded in measured numbers from this
machine: SQL generation for all 7 markets ~0.29s (the entire
"abstraction cost", paid at compile time - generated SQL has ZERO
runtime penalty), full 66-model/87-assertion offline pipeline 4.1s,
unit tests 2.1s, emit-sql 2.4s. Covers the engine-fit split (where SQL
Server wins by orders of magnitude and where columnar/MPP wins 10-100x),
the synchronous trigger tax vs asynchronous CDC, assertions as one
set-based scan vs per-row triggers, partition-pruned incrementals vs
the growing nightly window, market-count scaling (Germany's marginal
cost: two parallel queries), operational performance (idempotent
reruns, deterministic resubmissions, the 4-second verification loop),
an honest "where hand-crafted genuinely wins" section (freshness,
point access, tiny scale, specialist single-query tuning) and a
per-axis verdict table.

sql-developers-skill-gap.md - the people side: a full skills inventory
(transfers directly / needs adapting / genuinely new / becomes
obsolete) with the headline that the gap is asymmetric - small in
knowledge, meaningful in habit; the feared gap (JavaScript) is a week
of string-building glue, while the real gaps are git-not-server,
derived-not-maintained state, and data-not-procedure. Covers the
psychological gap ("where is my SQL?" -> dataform-sql/ as the security
blanket; loss-of-mastery framing), five failure patterns with their
tripwires (hand-editing generated SQL, if(market) creep, harness
bypass...), a staged learning path using this repo as the curriculum
(data diffs in days, builder changes in 2-4 weeks, market ownership in
~2 months, the worked scenarios as katas), who thrives vs struggles,
and organisational guidance (first tickets are data diffs; don't hire
JS developers to bridge a regulatory-judgement gap).

Both linked from the root README table; repo links validated.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>