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Dean Sheather
3452ab3166
Add a `chat_client_type` enum (`ui` | `api`) and `client_type` column to the `chats` table. The column defaults to `api` for new rows so API callers don't need to set it explicitly. Existing rows are backfilled to `ui`. The field flows through `CreateChatRequest`, `chatd.CreateOptions`, `InsertChat`, and is returned in the `Chat` response via `db2sdk`. <details> <summary>Implementation notes (Coder Agents generated)</summary> ### Changes **Database migration (000469)** - New enum `chat_client_type` with values `ui`, `api`. - New `client_type` column, `NOT NULL DEFAULT 'api'`. - Backfill: `UPDATE chats SET client_type = 'ui'`. **SQL query** — `InsertChat` now includes `client_type`. **SDK** — `ChatClientType` type added; `ClientType` field added to both `CreateChatRequest` (optional, defaults server-side to `api`) and `Chat` response. **Handler** — `postChats` maps the request field (defaulting to `api`) and passes it through `chatd.CreateOptions`. **Sub-agent** — Child chats inherit their parent's `client_type`. **db2sdk** — Maps the database value to the SDK type. ### Decision log - Default is `api` (not `ui`) so existing API integrations get the correct value without code changes. - Backfill sets existing rows to `ui` per requirement. - Child chats inherit `client_type` from parent rather than defaulting. </details>