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# Decisions

## Decision

* [Everything above the bundle is derived](derive-everything.md) - The index is disposable and rebuildable from files alone. _(verified)_
* [Measure adoption before retrieval quality](measure-adoption.md) - Concept-creation rate on non-project days is the signal. _(verified)_
* [Post-filter authorization at depth](postfilter-is-enough.md) - Retrieve at K>=500 and post-filter rather than building a query planner. _(verified)_
