feat(opencode): add interactive split-footer mode to run (#23557)

packages/opencode/test/cli/run/variant.shared.test.ts

@@ -0,0 +1,214 @@
+import path from "path"
+import { NodeFileSystem } from "@effect/platform-node"
+import { AppFileSystem } from "@opencode-ai/core/filesystem"
+import { describe, expect, test } from "bun:test"
+import { Effect, FileSystem, Layer } from "effect"
+import { Global } from "@opencode-ai/core/global"
+import {
+  createVariantRuntime,
+  cycleVariant,
+  formatModelLabel,
+  pickVariant,
+  resolveVariant,
+} from "@/cli/cmd/run/variant.shared"
+import type { SessionMessages } from "@/cli/cmd/run/session.shared"
+import type { RunProvider } from "@/cli/cmd/run/types"
+import { testEffect } from "../../lib/effect"
+
+const model = {
+  providerID: "openai",
+  modelID: "gpt-5",
+}
+
+const providers: RunProvider[] = [
+  {
+    id: "openai",
+    name: "OpenAI",
+    source: "api",
+    env: [],
+    options: {},
+    models: {
+      "gpt-5": {
+        id: "gpt-5",
+        providerID: "openai",
+        api: {
+          id: "gpt-5",
+          url: "https://openai.test",
+          npm: "@ai-sdk/openai",
+        },
+        name: "GPT-5",
+        capabilities: {
+          temperature: true,
+          reasoning: true,
+          attachment: true,
+          toolcall: true,
+          input: {
+            text: true,
+            audio: false,
+            image: false,
+            video: false,
+            pdf: false,
+          },
+          output: {
+            text: true,
+            audio: false,
+            image: false,
+            video: false,
+            pdf: false,
+          },
+          interleaved: false,
+        },
+        cost: {
+          input: 0,
+          output: 0,
+          cache: {
+            read: 0,
+            write: 0,
+          },
+        },
+        limit: {
+          context: 128000,
+          output: 8192,
+        },
+        status: "active",
+        options: {},
+        headers: {},
+        release_date: "2026-01-01",
+      },
+    },
+  },
+]
+
+function userMessage(id: string, input: { providerID: string; modelID: string; variant?: string }): SessionMessages[number] {
+  return {
+    info: {
+      id,
+      sessionID: "session-1",
+      role: "user",
+      time: {
+        created: 1,
+      },
+      agent: "build",
+      model: input,
+    },
+    parts: [],
+  }
+}
+
+const it = testEffect(Layer.mergeAll(AppFileSystem.defaultLayer, NodeFileSystem.layer))
+
+function remap(root: string, file: string) {
+  if (file === Global.Path.state) {
+    return root
+  }
+
+  if (file.startsWith(Global.Path.state + path.sep)) {
+    return path.join(root, path.relative(Global.Path.state, file))
+  }
+
+  return file
+}
+
+function remappedFs(root: string) {
+  return Layer.effect(
+    AppFileSystem.Service,
+    Effect.gen(function* () {
+      const fs = yield* AppFileSystem.Service
+      return AppFileSystem.Service.of({
+        ...fs,
+        readJson: (file) => fs.readJson(remap(root, file)),
+        writeJson: (file, data, mode) => fs.writeJson(remap(root, file), data, mode),
+      })
+    }),
+  ).pipe(Layer.provide(AppFileSystem.defaultLayer))
+}
+
+describe("run variant shared", () => {
+  test("prefers cli then session then saved variants", () => {
+    expect(resolveVariant("max", "high", "low", ["low", "high"])).toBe("max")
+    expect(resolveVariant(undefined, "high", "low", ["low", "high"])).toBe("high")
+    expect(resolveVariant(undefined, "missing", "low", ["low", "high"])).toBe("low")
+  })
+
+  test("cycles through variants and back to default", () => {
+    expect(cycleVariant(undefined, ["low", "high"])).toBe("low")
+    expect(cycleVariant("low", ["low", "high"])).toBe("high")
+    expect(cycleVariant("high", ["low", "high"])).toBeUndefined()
+    expect(cycleVariant(undefined, [])).toBeUndefined()
+  })
+
+  test("formats model labels", () => {
+    expect(formatModelLabel(model, undefined)).toBe("gpt-5 · openai")
+    expect(formatModelLabel(model, "high")).toBe("gpt-5 · openai · high")
+    expect(formatModelLabel(model, undefined, providers)).toBe("GPT-5 · OpenAI")
+    expect(formatModelLabel(model, "high", providers)).toBe("GPT-5 · OpenAI · high")
+  })
+
+  test("picks the latest matching variant from raw session messages", () => {
+    const msgs: SessionMessages = [
+      userMessage("msg-1", { providerID: "openai", modelID: "gpt-5", variant: "high" }),
+      userMessage("msg-2", { providerID: "anthropic", modelID: "sonnet", variant: "max" }),
+      userMessage("msg-3", { providerID: "openai", modelID: "gpt-5", variant: "minimal" }),
+    ]
+
+    expect(pickVariant(model, msgs)).toBe("minimal")
+  })
+
+  it.live("reads and writes saved variants through a runtime-backed app fs layer", () =>
+    Effect.gen(function* () {
+      const filesys = yield* FileSystem.FileSystem
+      const fs = yield* AppFileSystem.Service
+      const root = yield* filesys.makeTempDirectoryScoped()
+      const file = path.join(root, "model.json")
+
+      yield* fs.writeJson(file, {
+        recent: [{ providerID: "anthropic", modelID: "sonnet" }],
+        variant: {
+          "openai/gpt-4.1": "low",
+        },
+      })
+
+      const svc = createVariantRuntime(remappedFs(root))
+
+      yield* Effect.promise(() => svc.saveVariant(model, "high"))
+      expect(yield* Effect.promise(() => svc.resolveSavedVariant(model))).toBe("high")
+      expect(yield* fs.readJson(file)).toEqual({
+        recent: [{ providerID: "anthropic", modelID: "sonnet" }],
+        variant: {
+          "openai/gpt-4.1": "low",
+          "openai/gpt-5": "high",
+        },
+      })
+
+      yield* Effect.promise(() => svc.saveVariant(model, undefined))
+      expect(yield* Effect.promise(() => svc.resolveSavedVariant(model))).toBeUndefined()
+      expect(yield* fs.readJson(file)).toEqual({
+        recent: [{ providerID: "anthropic", modelID: "sonnet" }],
+        variant: {
+          "openai/gpt-4.1": "low",
+        },
+      })
+    }),
+  )
+
+  it.live("repairs malformed saved variant state on the next write", () =>
+    Effect.gen(function* () {
+      const filesys = yield* FileSystem.FileSystem
+      const fs = yield* AppFileSystem.Service
+      const root = yield* filesys.makeTempDirectoryScoped()
+      const file = path.join(root, "model.json")
+
+      yield* filesys.writeFileString(file, "{")
+
+      const svc = createVariantRuntime(remappedFs(root))
+
+      yield* Effect.promise(() => svc.saveVariant(model, "high"))
+      expect(yield* Effect.promise(() => svc.resolveSavedVariant(model))).toBe("high")
+      expect(yield* fs.readJson(file)).toEqual({
+        variant: {
+          "openai/gpt-5": "high",
+        },
+      })
+    }),
+  )
+})