fix(opencode): use ACP-reported reasoning effort options (#853)

* fix(opencode): use ACP-reported reasoning effort options

Expose thought_level options from OpenCode ACP to the web UI via RPC/API
instead of hardcoded presets, and validate effort values before setConfigOption.

Fixes #852

Co-authored-by: Cursor <cursoragent@cursor.com>

* fix(opencode): sync hub effort after coerced setConfigOption

When resolveThoughtLevelEffort falls back to a different supported value,
roll back session state after a successful ACP update so keepalive and the
web UI do not keep advertising the rejected effort.

Co-authored-by: Cursor <cursoragent@cursor.com>

---------

Co-authored-by: Cursor <cursoragent@cursor.com>

shared/src/apiTypes.ts

@@ -320,6 +320,18 @@ export type OpencodeModelsResponse = {
 
 export type ListOpencodeModelsResponse = OpencodeModelsResponse
 
+export type OpencodeReasoningEffortOption = {
+    value: string
+    name?: string
+}
+
+export type OpencodeReasoningEffortResponse = {
+    success: boolean
+    options?: OpencodeReasoningEffortOption[]
+    currentValue?: string | null
+    error?: string
+}
+
 export type CursorModelSummary = OpencodeModelSummary
 
 export type CursorModelsResponse = OpencodeModelsResponse

shared/src/rpcMethods.ts

@@ -28,7 +28,8 @@ export const RPC_METHODS = {
     ListCodexModels: 'listCodexModels',
     ListCursorModels: 'listCursorModels',
     ListOpencodeModels: 'listOpencodeModels',
-    ListOpencodeModelsForCwd: 'listOpencodeModelsForCwd'
+    ListOpencodeModelsForCwd: 'listOpencodeModelsForCwd',
+    ListOpencodeReasoningEffortOptions: 'listOpencodeReasoningEffortOptions'
 } as const
 
 export type RpcMethod = typeof RPC_METHODS[keyof typeof RPC_METHODS]