apps/server/package.json                             |   1 +
 apps/server/src/checkpointing/Diffs.test.ts          |  68 +++++++++
 apps/server/src/checkpointing/Diffs.ts               |  25 ++++
 apps/server/src/orchestration/Layer.test.ts          |  69 +++++----
 apps/server/src/orchestration/Layer.ts               |  53 +------
 apps/server/src/orchestration/Service.ts             |  21 +--
 apps/server/src/orchestration/reducer.test.ts        | 160 +++++++++++++++++++++
 apps/server/src/orchestration/reducer.ts             |  54 ++++++++
 apps/server/src/provider/Layers/CodexAdapter.test.ts |  39 ++++++
 apps/server/src/provider/Layers/CodexAdapter.ts      |  38 +++++
 apps/server/src/wsServer.ts                          | 111 +++++++++++----
 apps/web/src/components/ChatView.tsx                 | 239 +++++++-------------------------
 apps/web/src/components/DiffPanel.tsx                |  45 ++++--
 apps/web/src/hooks/useTurnDiffSummaries.ts           |   2 +-
 apps/web/src/session-logic.test.ts                   |  54 +++++++-
 apps/web/src/session-logic.ts                        |  44 +++++-
 apps/web/src/types.ts                                |   1 +
 bun.lock                                             |   1 +
 packages/contracts/src/orchestration.ts              |   1 +
 packages/contracts/src/providerRuntime.ts            |  15 ++
 20 files changed, 710 insertions(+), 331 deletions(-)