https://blog.jbledger.com/tags/tooling/Recent content in Tooling on The Public LedgerHugoen-usSat, 12 Sep 2026 16:00:00 +0000https://blog.jbledger.com/posts/the-same-data-three-tools-power-bi-dbt-and-duckdb/Sat, 12 Sep 2026 16:00:00 +0000https://blog.jbledger.com/posts/the-same-data-three-tools-power-bi-dbt-and-duckdb/One frozen snapshot of federal budget data through three modern stacks: a diffable Power BI model in TMDL, a dbt + DuckDB warehouse with 82 tests — and the five things the tests caught in real data.https://blog.jbledger.com/posts/a-copilot-that-says-no/Sat, 12 Sep 2026 15:00:00 +0000https://blog.jbledger.com/posts/a-copilot-that-says-no/A natural-language-to-SQL copilot with no LLM in it: a deterministic router, 40 pre-approved SELECTs, results frozen at build time, and a refusal taxonomy — out-of-scope, untracked-agency, injection, and more, each with a named reason.https://blog.jbledger.com/posts/an-honest-backtest-projecting-a-fiscal-year-end-two-ways/Sat, 12 Sep 2026 12:30:00 +0000https://blog.jbledger.com/posts/an-honest-backtest-projecting-a-fiscal-year-end-two-ways/Linear continuation vs. damped Holt-Winters, walked forward over 36 held-out periods. The winner’s margin is thin enough that a library convention flips it — so the page shows both methods and says so out loud.https://blog.jbledger.com/posts/what-a-sequester-a-cr-and-a-lapse-do-to-the-money/Sat, 12 Sep 2026 11:00:00 +0000https://blog.jbledger.com/posts/what-a-sequester-a-cr-and-a-lapse-do-to-the-money/The flow simulator follows a real appropriation — budget authority to obligations to outlays, month by month — and lets you pull the levers. Real data, frozen, with a scenario engine that applies each lever in a fixed, documented order.https://blog.jbledger.com/posts/six-macros-for-the-monthly-close/Sat, 12 Sep 2026 09:30:00 +0000https://blog.jbledger.com/posts/six-macros-for-the-monthly-close/A budget workbench in Excel: four template workbooks, six VBA macros for reconciliation, variance, and the close checklist — plus Python twins of the two computational macros so every number reproduces headlessly.