apps/server/src/orchestration/ThreadBackgroundLiveness.test.ts         |  32 +++-
 apps/server/src/orchestration/ThreadBackgroundLiveness.ts              |   7 +-
 apps/server/src/provider/Layers/CodexAdapter.test.ts                   |  83 +++++++++
 apps/server/src/provider/Layers/CodexAdapter.ts                        |  42 +++--
 apps/server/src/provider/Layers/CodexCollabRuntime.integration.test.ts | 309 ++++++++++++++++++++++++++++++++
 apps/server/src/provider/Layers/CodexCollabWire.test.ts                |   4 +
 apps/server/src/provider/Layers/CodexSessionRuntime.ts                 | 229 +++++++++++++++++++++--
 apps/server/src/provider/testFixtures/codexCollabMockPeer.mjs          |  50 +++++-
 docs/user/providers-codex.md                                           |   6 +
 packages/client-runtime/src/state/subagentRuntime.test.ts              |  37 ++++
 10 files changed, 762 insertions(+), 37 deletions(-)