# Phase 12 Bundle Impact Report

## Measurement scope

The repository has no dedicated analyzer plugin, so Phase 12 records reproducible source and production-output measurements rather than inventing treemap precision.

| Measurement                   |                             Phase 11 | Phase 12 |               Change |
| ----------------------------- | -----------------------------------: | -------: | -------------------: |
| Source files under `src`      |                                   62 |      135 |                  +73 |
| Source bytes under `src`      |                              148,035 |  251,655 |             +103,620 |
| Component source/style files  |                                   25 |       93 |                  +68 |
| Production `.next/standalone` | Not measured in Phase 11 environment |   35 MiB | Baseline established |
| Production `.next/static`     | Not measured in Phase 11 environment |  1.5 MiB | Baseline established |
| Production `.next/server`     | Not measured in Phase 11 environment |  9.7 MiB | Baseline established |

## Interpretation

The source increase is expected because Phase 12 adds the reusable component system, fixtures, and documentation surface. No dependency was added. Client boundaries are limited to nine inventory entries, and the component-lab route is environment-gated. The production build completed and preserved route-level code splitting.

## Follow-up gate

Run the repository's future bundle analyzer, when configured, against a Phase 11 build produced on the same pinned runtime. Cross-environment directory sizes are not a substitute for JavaScript chunk comparison, despite how tempting that spreadsheet would be.
