import { assert, it } from "@effect/vitest";import { ProviderDriverKind, ProviderInstanceId } from "@t3tools/contracts"; import { CodexProviderCapabilitiesV2 } from "./Adapters/CodexAdapterV2.ts";import { decideProviderSessionTransition } from "./ProviderSessionTransitionPolicy.ts"; const driver = ProviderDriverKind.make("codex");const instanceId = ProviderInstanceId.make("codex");const base = {  driver,  continuationIdentity: { driverKind: driver, continuationKey: "codex:account:one" },  modelSelection: { instanceId, model: "gpt-5.1-codex" },  runtimeMode: "full-access" as const,  interactionMode: "default" as const,  workspace: "/repo",  capabilities: CodexProviderCapabilitiesV2,}; it("reuses compatible sessions and treats interaction mode as turn-scoped", () => {  assert.deepEqual(    decideProviderSessionTransition({      current: base,      target: { ...base, interactionMode: "plan", available: true },    }),    { type: "reuse" },  );}); it("uses the adapter's selection transition classification", () => {  assert.deepEqual(    decideProviderSessionTransition({      current: base,      target: {        ...base,        modelSelection: { ...base.modelSelection, model: "gpt-5.2-codex" },        available: true,      },      selectionTransition: { type: "apply_on_next_turn" },    }),    { type: "switch_model_in_session" },  );  assert.deepEqual(    decideProviderSessionTransition({      current: {        ...base,        capabilities: {          ...base.capabilities,          sessions: { ...base.capabilities.sessions, supportsModelSwitchInSession: false },        },      },      target: {        ...base,        capabilities: {          ...base.capabilities,          sessions: { ...base.capabilities.sessions, supportsModelSwitchInSession: false },        },        modelSelection: { ...base.modelSelection, model: "gpt-5.2-codex" },        available: true,      },      selectionTransition: { type: "restart_session" },    }),    { type: "restart_and_resume" },  );}); it("treats provider option changes as selection changes", () => {  assert.deepEqual(    decideProviderSessionTransition({      current: {        ...base,        modelSelection: {          ...base.modelSelection,          options: [{ id: "reasoningEffort", value: "medium" }],        },      },      target: {        ...base,        modelSelection: {          ...base.modelSelection,          options: [{ id: "reasoningEffort", value: "high" }],        },        available: true,      },      selectionTransition: { type: "apply_on_next_turn" },    }),    { type: "switch_model_in_session" },  );}); it("restarts compatible instances for workspace or runtime changes", () => {  assert.deepEqual(    decideProviderSessionTransition({      current: base,      target: { ...base, workspace: "/other", available: true },    }),    { type: "restart_and_resume" },  );}); it("preserves a rejected selection when the workspace also changes", () => {  assert.deepEqual(    decideProviderSessionTransition({      current: base,      target: {        ...base,        modelSelection: { ...base.modelSelection, model: "gpt-5.2-codex" },        workspace: "/other",        available: true,      },      selectionTransition: {        type: "reject",        reason: "The active session cannot apply that model.",      },    }),    { type: "reject", reason: "The active session cannot apply that model." },  );}); it("preserves handoff and missing-classification outcomes across workspace changes", () => {  const target = {    ...base,    modelSelection: { ...base.modelSelection, model: "gpt-5.2-codex" },    workspace: "/other",    available: true,  };  assert.deepEqual(    decideProviderSessionTransition({      current: base,      target,      selectionTransition: { type: "create_with_handoff" },    }),    { type: "create_with_handoff" },  );  assert.deepEqual(decideProviderSessionTransition({ current: base, target }), {    type: "reject",    reason: "The provider adapter did not classify the selection change.",  });}); it("uses portable handoff for incompatible continuation identities", () => {  assert.deepEqual(    decideProviderSessionTransition({      current: base,      target: {        ...base,        modelSelection: {          ...base.modelSelection,          instanceId: ProviderInstanceId.make("codex_other"),        },        continuationIdentity: { driverKind: driver, continuationKey: "codex:account:other" },        available: true,      },    }),    { type: "create_with_handoff" },  );}); it("uses portable handoff for cross-driver transitions", () => {  const claudeDriver = ProviderDriverKind.make("claude");  assert.deepEqual(    decideProviderSessionTransition({      current: base,      target: {        ...base,        driver: claudeDriver,        continuationIdentity: { driverKind: claudeDriver, continuationKey: "claude:account:one" },        modelSelection: {          instanceId: ProviderInstanceId.make("claude"),          model: "claude-opus-4-1",        },        available: true,      },    }),    { type: "create_with_handoff" },  );});