feat(showcase/google-adk): reconcile registry, route, manifest for parity blitz

Orchestrator pass after 37 parallel slot ports of google-adk demos to
match langgraph-python (north-star). Slot commits ported each demo's
frontend verbatim; this commit reconciles the cross-cutting wiring that
slot agents were forbidden from touching:

- registry.py: rename agent keys to match LP frontend agent= props
  (10+ underscore→hyphen renames for demos using the main copilotkit
  route; demos with dedicated routes keep their underscored backend
  keys since the dedicated route handles frontend→backend translation).
- route.ts: agentNames array updated to match registry.
- manifest.yaml: features list now matches the demos that actually
  exist; renamed agentic-chat-reasoning→reasoning-custom,
  reasoning-default-render→reasoning-default,
  byoc-hashbrown→declarative-hashbrown,
  byoc-json-render→declarative-json-render; added shared-state-read
  (was a working demo dir but not declared); moved shared-state-streaming
  out of not_supported_features (it works on Gemini Studio via chunk-
  level fallback); retired the standalone hitl demo and the duplicate
  hitl-in-chat-booking entry.
- src/app/demos/hitl/ and src/app/demos/shared-state-write/: deleted
  (orphaned dirs not in LP's surface).
- src/app/page.tsx: integration dev landing — drop deleted demos.
- src/app/demos/prebuilt-sidebar/page.tsx: revert slot 01's
  hyphen→underscore swap; LP's verbatim hyphenated agent= is the
  source of truth (registry was renamed to match).
- shared-state-read agent: registry entry swapped from
  shared_state_read_agent (had a set_recipe tool, turning it into
  read+write) to _simple_chat (matches LP's neutral default agent —
  read-only contract).

Known follow-ups (deferred — tracked separately):
- Tool-rendering family backend: ADK currently exposes
  get_weather + search_flights(flights list) + query_data; LP
  exposes get_weather + search_flights(origin, destination) +
  get_stock_price + roll_d20. The 4 tool-rendering demos render
  correctly for weather but the LP suggestion pills referencing
  stocks and d20 rolls will not produce backend tool calls.
- Subagents agent: emits running/completed/failed; LP frontend
  expects completed-only. Mid-flight rows render as raw badge text.
- Agent-config agent: reads state["config"] but LP frontend now
  publishes via useAgentContext; agent will receive nothing.
- Beautiful-chat agent: missing manage_todos + generate_a2ui tools
  that the LP frontend exercises.
- Open-gen-ui-advanced agent prompt: tells Gemini to call
  window.sandbox.* but the LP frontend wires Websandbox.connection.
  remote.* — generated UIs will reference a nonexistent API.
- gen-ui-interrupt and interrupt-headless: confirmed BLOCKED.
  Gemini/ADK has no interrupt() primitive; the existing ADK Strategy
  B (useFrontendTool with async Promise) is the only available
  adaptation and cannot match LP's useInterrupt 1:1.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: tylerslaton

showcase/integrations/google-adk/manifest.yaml

@@ -25,8 +25,6 @@ interaction_modalities:
 managed_platform:
   name: Google AI Studio
   url: https://aistudio.google.com
-not_supported_features:
-  - shared-state-streaming
 features:
   - beautiful-chat
   - cli-start
@@ -37,29 +35,29 @@ features:
   - chat-customization-css
   - headless-simple
   - headless-complete
-  - agentic-chat-reasoning
-  - reasoning-default-render
+  - reasoning-custom
+  - reasoning-default
   - frontend-tools
   - frontend-tools-async
   - gen-ui-tool-based
-  - hitl
   - hitl-in-app
   - hitl-in-chat
-  - hitl-in-chat-booking
   - declarative-gen-ui
   - a2ui-fixed-schema
   - gen-ui-agent
   - tool-rendering-default-catchall
   - tool-rendering-custom-catchall
   - tool-rendering
   - tool-rendering-reasoning-chain
+  - shared-state-read
   - shared-state-read-write
+  - shared-state-streaming
   - readonly-state-agent-context
   - subagents
   - multimodal
   - auth
-  - byoc-hashbrown
-  - byoc-json-render
+  - declarative-hashbrown
+  - declarative-json-render
   - open-gen-ui
   - open-gen-ui-advanced
   - voice
@@ -148,32 +146,9 @@ demos:
       - src/app/demos/frontend-tools-async/page.tsx
       - src/app/demos/frontend-tools-async/notes-card.tsx
       - src/app/api/copilotkit/route.ts
-  - id: hitl
-    name: In-Chat Human in the Loop (Original)
-    description: User approves agent actions before execution
-    tags:
-      - interactivity
-    route: /demos/hitl
-    animated_preview_url:
-    highlight:
-      - src/app/demos/hitl/agent.py
-      - src/app/demos/hitl/page.tsx
-      - src/app/api/copilotkit/route.ts
   - id: hitl-in-chat
-    name: In-Chat HITL (book_call)
-    description: Frontend-tool HITL via useHumanInTheLoop — agent calls book_call, frontend renders an in-chat time-picker, user's selection is forwarded back as the tool result
-    tags:
-      - interactivity
-    route: /demos/hitl-in-chat
-    animated_preview_url:
-    highlight:
-      - src/agents/hitl_in_chat_book_call_agent.py
-      - src/app/demos/hitl-in-chat/page.tsx
-      - src/app/demos/hitl-in-chat/time-picker-card.tsx
-      - src/app/api/copilotkit/route.ts
-  - id: hitl-in-chat-booking
-    name: In-Chat HITL (Booking)
-    description: Time-picker card rendered inline via useHumanInTheLoop for a booking flow
+    name: "Human In the Loop: In-chat"
+    description: Time-slot picker rendered inline in the chat via `useHumanInTheLoop` — the agent requests user input, the frontend renders a TimePickerCard, and the user's choice resumes the agent.
     tags:
       - interactivity
     route: /demos/hitl-in-chat
@@ -240,9 +215,19 @@ demos:
       - src/agents/gen_ui_agent.py
       - src/app/demos/gen-ui-agent/page.tsx
       - src/app/api/copilotkit/route.ts
+  - id: shared-state-read
+    name: "Shared State: Read-only"
+    description: "Recipe editor publishes form state via agent.setState; the agent reads the recipe context but does not mutate it (no backend tool — neutral default agent)."
+    tags:
+      - agent-state
+    route: /demos/shared-state-read
+    animated_preview_url:
+    highlight:
+      - src/app/demos/shared-state-read/page.tsx
+      - src/app/api/copilotkit/route.ts
   - id: shared-state-read-write
-    name: Shared State (Read + Write)
-    description: Bidirectional agent state — UI writes preferences, agent writes notes back
+    name: "Shared State: Read + Write"
+    description: Bidirectional shared state — UI writes preferences via agent.setState; agent writes notes via a Command-returning tool
     tags:
       - agent-state
     route: /demos/shared-state-read-write
@@ -334,28 +319,28 @@ demos:
       - src/app/demos/headless-complete/page.tsx
       - src/app/demos/headless-complete/message-list.tsx
       - src/app/api/copilotkit/route.ts
-  - id: agentic-chat-reasoning
-    name: Reasoning
+  - id: reasoning-custom
+    name: "Reasoning: Custom"
     description: Visible reasoning/thinking chain alongside the final answer (Gemini 2.5 thinking mode)
     tags:
-      - generative-ui
-    route: /demos/agentic-chat-reasoning
+      - chat-ui
+    route: /demos/reasoning-custom
     animated_preview_url:
     highlight:
-      - src/app/demos/agentic-chat-reasoning/page.tsx
-      - src/app/demos/agentic-chat-reasoning/reasoning-block.tsx
+      - src/app/demos/reasoning-custom/page.tsx
+      - src/app/demos/reasoning-custom/reasoning-block.tsx
       - src/agents/shared_chat.py
       - src/app/api/copilotkit/route.ts
-  - id: reasoning-default-render
-    name: Reasoning (Default Render)
-    description: Built-in CopilotChatReasoningMessage renders without a custom slot
+  - id: reasoning-default
+    name: "Reasoning: Default"
+    description: Built-in CopilotChatReasoningMessage rendering with no slot override.
     tags:
-      - generative-ui
-    route: /demos/reasoning-default-render
+      - chat-ui
+    route: /demos/reasoning-default
     animated_preview_url:
     highlight:
       - src/agents/shared_chat.py
-      - src/app/demos/reasoning-default-render/page.tsx
+      - src/app/demos/reasoning-default/page.tsx
       - src/app/api/copilotkit/route.ts
   - id: declarative-gen-ui
     name: Declarative Generative UI (A2UI)
@@ -411,18 +396,18 @@ demos:
       - src/agents/tool_rendering_common.py
       - src/app/demos/tool-rendering-reasoning-chain/page.tsx
       - src/app/api/copilotkit/route.ts
-  - id: byoc-json-render
-    name: BYOC json-render
+  - id: declarative-json-render
+    name: "Declarative UI: json-render"
     description: Streaming hierarchical JSON UI spec rendered via @json-render/react, with a Zod-validated catalog (MetricCard + PieChart + BarChart)
     tags:
       - generative-ui
-    route: /demos/byoc-json-render
+    route: /demos/declarative-json-render
     animated_preview_url:
     highlight:
       - src/agents/byoc_agents.py
-      - src/app/demos/byoc-json-render/page.tsx
-      - src/app/demos/byoc-json-render/json-render-renderer.tsx
-      - src/app/api/copilotkit-byoc-json-render/route.ts
+      - src/app/demos/declarative-json-render/page.tsx
+      - src/app/demos/declarative-json-render/json-render-renderer.tsx
+      - src/app/api/copilotkit-declarative-json-render/route.ts
   - id: beautiful-chat
     name: Beautiful Chat
     description: Canonical polished starter chat — brand fonts, theme tokens, suggestion pills
@@ -457,16 +442,16 @@ demos:
       - src/app/demos/auth/auth-banner.tsx
       - src/app/demos/auth/demo-token.ts
       - src/app/api/copilotkit-auth/route.ts
-  - id: byoc-hashbrown
-    name: BYOC Hashbrown
+  - id: declarative-hashbrown
+    name: "Declarative UI: Hashbrown"
     description: Streaming structured output via @hashbrownai/react, rendering a sales dashboard catalog (MetricCard + PieChart + BarChart)
     tags:
       - generative-ui
-    route: /demos/byoc-hashbrown
+    route: /demos/declarative-hashbrown
     animated_preview_url:
     highlight:
       - src/agents/byoc_agents.py
-      - src/app/demos/byoc-hashbrown/page.tsx
+      - src/app/demos/declarative-hashbrown/page.tsx
       - src/app/api/copilotkit-byoc-hashbrown/route.ts
   - id: open-gen-ui
     name: Fully Open-Ended Generative UI

showcase/integrations/google-adk/src/agents/registry.py

@@ -114,9 +114,7 @@ class AgentSpec:
     "tool-rendering": AgentSpec(tool_rendering_agent),
     "gen-ui-tool-based": AgentSpec(gen_ui_tool_based_agent),
     "gen-ui-agent": AgentSpec(gen_ui_agent),
-    "human_in_the_loop": AgentSpec(hitl_in_chat_agent),
-    "shared-state-read": AgentSpec(shared_state_read_agent),
-    "shared-state-write": AgentSpec(shared_state_read_write_agent),
+    "shared-state-read": AgentSpec(_simple_chat),
     "shared-state-read-write": AgentSpec(shared_state_read_write_agent),
     "shared-state-streaming": AgentSpec(
         shared_state_streaming_agent,
@@ -127,41 +125,41 @@ class AgentSpec:
     # ----- Frontend-only demos that share the simple chat agent -----
     # (manifest declares them as separate features; agent path is shared)
     "frontend_tools": AgentSpec(_simple_chat),
-    "frontend_tools_async": AgentSpec(_simple_chat),
-    "prebuilt_sidebar": AgentSpec(_simple_chat),
-    "prebuilt_popup": AgentSpec(_simple_chat),
-    "chat_slots": AgentSpec(_simple_chat),
-    "chat_customization_css": AgentSpec(_simple_chat),
-    "headless_simple": AgentSpec(_simple_chat),
+    "frontend-tools-async": AgentSpec(_simple_chat),
+    "prebuilt-sidebar": AgentSpec(_simple_chat),
+    "prebuilt-popup": AgentSpec(_simple_chat),
+    "chat-slots": AgentSpec(_simple_chat),
+    "chat-customization-css": AgentSpec(_simple_chat),
+    "headless-simple": AgentSpec(_simple_chat),
     "headless_complete": AgentSpec(_simple_chat),
     "voice": AgentSpec(_simple_chat),
     # ----- Reasoning demos -----
-    "agentic_chat_reasoning": AgentSpec(_thinking_chat),
-    "reasoning_default_render": AgentSpec(_thinking_chat),
+    "reasoning-custom": AgentSpec(_thinking_chat),
+    "reasoning-default": AgentSpec(_thinking_chat),
     # ----- Tool-rendering variants -----
-    "tool_rendering_default_catchall": AgentSpec(
+    "tool-rendering-default-catchall": AgentSpec(
         tool_rendering_default_catchall_agent
     ),
-    "tool_rendering_custom_catchall": AgentSpec(
+    "tool-rendering-custom-catchall": AgentSpec(
         tool_rendering_custom_catchall_agent
     ),
-    "tool_rendering_reasoning_chain": AgentSpec(
+    "tool-rendering-reasoning-chain": AgentSpec(
         tool_rendering_reasoning_chain_agent
     ),
     # ----- HITL variants -----
-    "hitl_in_chat": AgentSpec(hitl_in_chat_book_call_agent),
-    "hitl_in_app": AgentSpec(hitl_in_app_agent),
+    "hitl-in-chat": AgentSpec(hitl_in_chat_book_call_agent),
+    "hitl-in-app": AgentSpec(hitl_in_app_agent),
     # ----- MCP Apps -----
-    "mcp_apps": AgentSpec(mcp_apps_agent),
+    "mcp-apps": AgentSpec(mcp_apps_agent),
     # ----- Multimodal & state-context -----
     "multimodal": AgentSpec(multimodal_agent),
-    "readonly_state_agent_context": AgentSpec(readonly_state_agent_context_agent),
+    "readonly-state-agent-context": AgentSpec(readonly_state_agent_context_agent),
     "agent_config": AgentSpec(agent_config_agent),
     # ----- A2UI -----
     "declarative_gen_ui": AgentSpec(declarative_gen_ui_agent),
     "a2ui_fixed_schema": AgentSpec(a2ui_fixed_agent),
-    # ----- BYOC -----
-    "byoc_hashbrown": AgentSpec(byoc_agent),
+    # ----- BYOC / Declarative -----
+    "declarative-hashbrown": AgentSpec(byoc_agent),
     "byoc_json_render": AgentSpec(byoc_agent),
     # ----- Open Gen UI -----
     "open_gen_ui": AgentSpec(open_gen_ui_agent),

showcase/integrations/google-adk/src/app/api/copilotkit/route.ts

@@ -20,41 +20,39 @@ const agentNames = [
   "tool-rendering",
   "gen-ui-tool-based",
   "gen-ui-agent",
-  "human_in_the_loop",
   "shared-state-read",
-  "shared-state-write",
   "shared-state-read-write",
   "shared-state-streaming",
   "subagents",
   // frontend-only demos (share simple chat agent on the backend)
   "frontend_tools",
-  "frontend_tools_async",
-  "prebuilt_sidebar",
-  "prebuilt_popup",
-  "chat_slots",
-  "chat_customization_css",
-  "headless_simple",
+  "frontend-tools-async",
+  "prebuilt-sidebar",
+  "prebuilt-popup",
+  "chat-slots",
+  "chat-customization-css",
+  "headless-simple",
   "headless_complete",
   "voice",
   // reasoning
-  "agentic_chat_reasoning",
-  "reasoning_default_render",
+  "reasoning-custom",
+  "reasoning-default",
   // tool-rendering variants
-  "tool_rendering_default_catchall",
-  "tool_rendering_custom_catchall",
-  "tool_rendering_reasoning_chain",
+  "tool-rendering-default-catchall",
+  "tool-rendering-custom-catchall",
+  "tool-rendering-reasoning-chain",
   // hitl variants
-  "hitl_in_chat",
-  "hitl_in_app",
+  "hitl-in-chat",
+  "hitl-in-app",
   // multimodal & state-context
   "multimodal",
-  "readonly_state_agent_context",
+  "readonly-state-agent-context",
   "agent_config",
   // a2ui
   "declarative_gen_ui",
   "a2ui_fixed_schema",
-  // byoc
-  "byoc_hashbrown",
+  // byoc / declarative
+  "declarative-hashbrown",
   "byoc_json_render",
   // open gen ui
   "open_gen_ui",
@@ -64,7 +62,7 @@ const agentNames = [
   // auth
   "auth",
   // mcp apps (also wired via separate runtime route copilotkit-mcp-apps)
-  "mcp_apps",
+  "mcp-apps",
   // interrupt-adapted demos (Strategy B: useFrontendTool + async Promise)
   "gen_ui_interrupt",
   "interrupt_headless",