The bridge only supported a single global model (DEEPSEEK_MODEL env /
default_text_model in config.toml). Users who wanted a different model
for a particular Feishu group had to restart the bridge with a different
env var — impractical and disruptive.
This commit adds per-chat model switching so users in a group chat can
run "/model <name>" to switch the model for all future threads and
turns in that chat, without affecting other chats.
Changes:
- **lib.mjs — commandAction()**: handle "model" command → { kind:
"set_model", modelName }.
- **index.mjs**:
- setChatModel(chatId, modelName): store/clear per-chat model in the
thread store. "/model default" resets to the bridge-level default.
- ensureThread(): read per-chat model from store when creating a
new runtime thread; fall back to config.model.
- runPrompt(): read per-chat model for each turn submission
(independent of the thread-creation model), so a /model change
takes effect on the very next message.
Usage:
/model deepseek-v4-flash — switch this chat to Flash
/model deepseek-v4-pro — switch this chat to Pro
/model default — reset to bridge default
Resolution priority (per-chat): global default < per-chat /model.
/ 新增 /model 命令，支持按飞书群设置独立模型。
/ 群内输入 /model <name> 切换，/model default 恢复全局默认。
yuanchenglu
82499e1c20