fix(opencode): include all-mode agents in mode picker (#606)

packages/server/src/server/agent/providers/opencode-agent.test.ts

@@ -554,6 +554,15 @@ describe("OpenCode adapter context-window normalization", () => {
       },
     ]);
   });
+
+  test("treats primary and all OpenCode agents as selectable modes", () => {
+    expect(__openCodeInternals.isSelectableOpenCodeAgent({ mode: "primary" })).toBe(true);
+    expect(__openCodeInternals.isSelectableOpenCodeAgent({ mode: "all" })).toBe(true);
+    expect(__openCodeInternals.isSelectableOpenCodeAgent({ mode: "subagent" })).toBe(false);
+    expect(__openCodeInternals.isSelectableOpenCodeAgent({ mode: "all", hidden: true })).toBe(
+      false,
+    );
+  });
 });
 
 describe("OpenCode adapter startTurn error handling", () => {

packages/server/src/server/agent/providers/opencode-agent.ts

@@ -424,6 +424,10 @@ function resolveOpenCodeRuntimeAgentId(modeId: string | null | undefined): strin
     : normalizedModeId;
 }
 
+function isSelectableOpenCodeAgent(agent: { mode?: string; hidden?: boolean }): boolean {
+  return (agent.mode === "primary" || agent.mode === "all") && agent.hidden !== true;
+}
+
 function mergeOpenCodeModes(discoveredModes: AgentMode[]): AgentMode[] {
   const modesById = new Map(DEFAULT_MODES.map((mode) => [mode.id, mode]));
   for (const mode of discoveredModes) {
@@ -728,6 +732,7 @@ export const __openCodeInternals = {
   reconcileOpenCodeSessionClose,
   resolveOpenCodeModelLookupKeyFromAssistantMessage,
   resolveOpenCodeSelectedModelContextWindow,
+  isSelectableOpenCodeAgent,
   get OpenCodeAgentSession() {
     return OpenCodeAgentSession;
   },
@@ -1191,9 +1196,7 @@ export class OpenCodeAgentClient implements AgentClient {
         return DEFAULT_MODES;
       }
 
-      const discovered = response.data
+      const discovered = response.data.filter(isSelectableOpenCodeAgent).map((agent) => ({
-        .filter((agent) => agent.mode === "primary" && agent.hidden !== true)
-        .map((agent) => ({
         id: agent.name,
         label: agent.name.charAt(0).toUpperCase() + agent.name.slice(1),
         description:
@@ -2462,9 +2465,7 @@ class OpenCodeAgentSession implements AgentSession {
     });
     const agents = response.error || !response.data ? [] : response.data;
 
-    const discoveredModes = agents
+    const discoveredModes = agents.filter(isSelectableOpenCodeAgent).map((agent) => ({
-      .filter((agent) => agent.mode === "primary" && agent.hidden !== true)
-      .map((agent) => ({
       id: agent.name,
       label: agent.name.charAt(0).toUpperCase() + agent.name.slice(1),
       description: