chore(ai)!: drop @ai-sdk provider SDKs from framework, align spec with ai v7 (#2464)

AI runtime moved to the cloud package (service-ai removed from open edition,
ADR-0025 S2). Remove the now-dead @ai-sdk provider deps from @objectstack/cli
and examples/app-todo (zero usages), and bump @objectstack/spec's `ai`
peer/dev dependency ^6 -> ^7. Spec only re-exports canonical AI SDK types
(all present in ai@7); `ai` stays an optional peer.

Verified: spec build + 6650 spec tests green on ai@7; cli turbo build 54/54.

First step of the ai v6->v7 / @ai-sdk v3->v4 migration (cloud + objectui follow).

Co-authored-by: Jack Zhuang <277994282+os-zhuang@users.noreply.github.com>
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

Author: os-zhuang

.changeset/ai-sdk-v7-framework.md

@@ -0,0 +1,25 @@
+---
+'@objectstack/spec': minor
+---
+
+chore(ai): align framework with Vercel AI SDK v7 and stop bundling provider SDKs
+
+AI runtime capabilities now live in the cloud package (service-ai removed from the
+open edition, ADR-0025 S2). The framework therefore no longer ships any `@ai-sdk/*`
+provider SDK:
+
+- `@objectstack/cli` drops the dead `@ai-sdk/anthropic|gateway|google|openai`
+  dependencies (zero usages in `cli/src` — they were only bundled so the old
+  in-tree `service-ai` could `require()` them at runtime). Apps that boot the
+  closed AI now declare the providers themselves (cloud side).
+- `examples/app-todo` drops the unused `ai` / `@ai-sdk/gateway` devDeps and the
+  dead `test:ai*` / `test:agent` / `test:llm` scripts (their test files were
+  migrated to cloud).
+- `@objectstack/spec` bumps its `ai` peer/dev dependency from `^6` to `^7`. The
+  protocol still re-exports the canonical message/stream types (`ModelMessage`,
+  `TextStreamPart`, `ToolSet`, `FinishReason`, …) — all verified present in
+  `ai@7`; `ai` stays an OPTIONAL peer so installs are not forced.
+
+First step of the AI SDK v6→v7 / providers v3→v4 upgrade. Cloud (service-ai
+adapter migration + apps declaring v4 providers) and objectui (chatbot useChat
+v7) follow in their own PRs.

examples/app-todo/package.json

@@ -17,13 +17,6 @@
     "validate": "objectstack validate",
     "typecheck": "tsc --noEmit",
     "test": "objectstack test",
-    "test:ai": "tsx test/ai.test.ts",
-    "test:agent": "tsx test/ai-agent.test.ts",
-    "test:action": "tsx test/ai-action.test.ts",
-    "test:hitl": "tsx test/ai-hitl.test.ts",
-    "test:hitl:llm": "tsx test/ai-hitl-llm.test.ts",
-    "test:llm": "tsx test/ai-llm.test.ts",
-    "test:knowledge:llm": "tsx test/ai-knowledge-llm.test.ts",
     "test:mcp": "tsx test/mcp-actions.test.ts"
   },
   "dependencies": {
@@ -38,9 +31,7 @@
     "@objectstack/spec": "workspace:*"
   },
   "devDependencies": {
-    "@ai-sdk/gateway": "^3.0.139",
     "@objectstack/cli": "workspace:*",
-    "ai": "^6.0.214",
     "tsx": "^4.22.4",
     "typescript": "^6.0.3",
     "vitest": "^4.1.9"

packages/cli/package.json

@@ -39,10 +39,6 @@
     "topicSeparator": " "
   },
   "dependencies": {
-    "@ai-sdk/anthropic": "^3.0.89",
-    "@ai-sdk/gateway": "^3.0.139",
-    "@ai-sdk/google": "^3.0.86",
-    "@ai-sdk/openai": "^3.0.77",
     "@objectstack/account": "workspace:*",
     "@objectstack/client": "workspace:*",
     "@objectstack/cloud-connection": "workspace:*",

packages/spec/package.json

@@ -208,7 +208,7 @@
   "devDependencies": {
     "@types/node": "^26.0.1",
     "@vitest/coverage-v8": "^4.1.9",
-    "ai": "^6.0.214",
+    "ai": "^7.0.4",
     "tsx": "^4.22.4",
     "typescript": "^6.0.3",
     "vitest": "^4.1.9"
@@ -217,7 +217,7 @@
     "zod": "^4.4.3"
   },
   "peerDependencies": {
-    "ai": "^6.0.0"
+    "ai": "^7.0.0"
   },
   "peerDependenciesMeta": {
     "ai": {