fix(app): always list OpenCode free models in the model picker (#60047)

Author: Hona

packages/app/e2e/regression/composer.spec.ts

@@ -889,6 +889,25 @@ test("keeps focus in a dialog that replaces the model dialog and returns it to t
   await expect(editor).toHaveText("keep, me")
 })
 
+test("lists OpenCode's free models in the model picker however old they are", async ({ page }) => {
+  await page.clock.setFixedTime(T0)
+  const year = { released: T0 - 365 * 24 * 60 * 60 * 1000 }
+  await openSession(page, {
+    name: "ComposerFreeModels",
+    provider: provider(
+      { id: "new-paid", name: "New Paid", cost: { input: 1, output: 1 }, time: { released: T0 } },
+      { id: "old-paid", name: "Old Paid", cost: { input: 1, output: 1 }, time: year },
+      { id: "big-pickle", name: "Big Pickle", cost: { input: 0, output: 0 }, time: year },
+    ),
+  })
+
+  await page.locator('[data-component="composer"] [data-action="composer-model"]').click()
+  const models = page.getByRole("dialog", { name: "Select model", exact: true })
+  await expect(models.locator('[data-option-key="opencode:new-paid"]')).toBeVisible()
+  await expect(models.locator('[data-option-key="opencode:big-pickle"]')).toBeVisible()
+  await expect(models.locator('[data-option-key="opencode:old-paid"]')).toHaveCount(0)
+})
+
 test("lists slash commands in their built-in order", async ({ page }) => {
   const { editor } = await openSession(page, {
     name: "ComposerSlash",

packages/app/e2e/utils/mock-server.ts

@@ -1554,7 +1554,7 @@ function currentModels(catalog: MockProviderCatalog) {
           variants: Object.entries(model.variants ?? {}).map(([id, settings]) =>
             Predicate.isObject(settings) ? { id, settings } : { id },
           ),
-          time: { released: Date.now() },
+          time: model.time ?? { released: Date.now() },
           cost: [{ input: model.cost?.input ?? 0, output: model.cost?.output ?? 0, cache: { read: 0, write: 0 } }],
           status: "active",
           enabled: true,
@@ -1687,6 +1687,7 @@ const decodeModel = Schema.decodeUnknownOption(
     cost: lenient(Schema.Struct({ input: lenient(Schema.Number), output: lenient(Schema.Number) })),
     capabilities: lenient(Model.Capabilities),
     variants: lenient(Schema.Record(Schema.String, Schema.Unknown)),
+    time: lenient(Schema.Struct({ released: Schema.Number })),
   }),
 )
 

packages/app/src/providers/models/models.tsx

@@ -84,6 +84,17 @@ const createModelsController = (directory: Accessor<string | undefined>) => {
 
   const latestSet = createMemo(() => new Set(latest().map((x) => modelKey(x))))
 
+  // OpenCode's free models (Big Pickle) stay on offer long after release, so they are listed regardless of age or a
+  // newer free model in the same family.
+  const freeSet = createMemo(
+    () =>
+      new Set(
+        available()
+          .filter(isFreeModel)
+          .map((x) => modelKey({ providerID: x.provider.id, modelID: x.id })),
+      ),
+  )
+
   const visibility = createMemo(() => {
     const map = new Map<string, Visibility>()
 
@@ -122,7 +133,7 @@ const createModelsController = (directory: Accessor<string | undefined>) => {
 
     if (state === "show") return true
 
-    if (latestSet().has(key)) return true
+    if (latestSet().has(key) || freeSet().has(key)) return true
 
     // Models without a parseable release date stay visible.
     return !Number.isFinite(release().get(key) ?? NaN)