Remember last used binary and show environment variables

src/stores/instances.ts

@@ -3,7 +3,7 @@ import type { Instance, LogEntry } from "../types/instance"
 import { sdkManager } from "../lib/sdk-manager"
 import { sseManager } from "../lib/sse-manager"
 import { fetchSessions, fetchAgents, fetchProviders } from "./sessions"
-import { preferences } from "./preferences"
+import { preferences, updateLastUsedBinary } from "./preferences"
 
 const [instances, setInstances] = createSignal<Map<string, Instance>>(new Map())
 const [activeInstanceId, setActiveInstanceId] = createSignal<string | null>(null)
@@ -52,10 +52,16 @@ async function createInstance(folder: string, binaryPath?: string): Promise<stri
     status: "starting",
     client: null,
     logs: [],
+    environmentVariables: preferences().environmentVariables,
   }
 
   addInstance(instance)
 
+  // Update last used binary
+  if (binaryPath) {
+    updateLastUsedBinary(binaryPath)
+  }
+
   try {
     const {
       id: returnedId,

src/stores/preferences.ts

@@ -96,8 +96,13 @@ function updateLastUsedBinary(path: string): void {
   updatePreferences({ lastUsedBinary: path })
 
   const binaries = opencodeBinaries()
-  const binary = binaries.find((b) => b.path === path)
-  if (binary) {
+  let binary = binaries.find((b) => b.path === path)
+
+  // If binary not found in list, add it (for system PATH "opencode")
+  if (!binary) {
+    addOpenCodeBinary(path)
+    binary = { path, lastUsed: Date.now() }
+  } else {
     binary.lastUsed = Date.now()
     // Move to front
     const sorted = [binary, ...binaries.filter((b) => b.path !== path)]