Implement plan explanations, original decision traces, calendar replay, and worker counterfactual analysis. Preserve incomplete checkpoints and conflict reasons, with accessible navigation and localized comparison details.
Keep planning outcomes independent of tracing and bound worker delivery with receiver acknowledgements. Retain complete candidate history while releasing temporary buffers and benchmark references.
Validated with 201 tests, app/spec type checks, lint, production build, baseline outcome comparisons, and repeated loaded browser measurements. Document performance and remaining limits.