.plans/11-effect.md                                            |   42 ++
 apps/server/src/checkpointing/Errors.ts                        |   24 +-
 apps/server/src/checkpointing/Layers/CheckpointService.test.ts |  404 +++++++++++++
 apps/server/src/checkpointing/Layers/CheckpointService.ts      | 1008 ++++++++++++++++++++++++++++++++
 apps/server/src/checkpointing/Layers/CheckpointStore.ts        |  418 +++++++++++++
 apps/server/src/checkpointing/Services/CheckpointCatalog.ts    |   83 ---
 apps/server/src/checkpointing/Services/CheckpointService.ts    |    6 +-
 apps/server/src/checkpointing/Services/CheckpointStore.ts      |   51 +-
 apps/server/src/git/Errors.ts                                  |   16 +
 apps/server/src/git/process.test.ts                            |   51 ++
 apps/server/src/git/process.ts                                 |  174 ++++++
 apps/server/src/persistence/Errors.ts                          |  112 ++--
 apps/server/src/persistence/Layers/Checkpoints.test.ts         |   95 +++
 apps/server/src/persistence/Layers/Checkpoints.ts              |  363 ++++++++++++
 apps/server/src/persistence/Migrations.ts                      |    2 +
 apps/server/src/persistence/Migrations/003_Checkpoints.ts      |   26 +
 apps/server/src/persistence/Services/Checkpoints.ts            |   95 +++
 apps/server/src/provider/contracts.test.ts                     |   45 +-
 18 files changed, 2832 insertions(+), 183 deletions(-)