Files
2026-07-13 12:58:18 +08:00

123 lines
6.2 KiB
Markdown

# Parity Notes
Baseline: `showcase/integrations/langgraph-python/`.
This package ports the frontend-composition demos satisfied by the shared
Claude backend in `src/agents/agent.py`, plus dedicated ogui / headless
surfaces. The demos below are deliberately out of scope for this pass and
left for a follow-up.
## New demos (post-PR #4271)
- `byoc-json-render` — dedicated `/byoc-json-render` agent endpoint emits
a JSON spec; frontend renders via `<JSONUIProvider>` + `<Renderer />`
against a Zod catalog (MetricCard, BarChart, PieChart). Includes the
`<JSONUIProvider>` fix from PR #4271 and the `defineRegistry`
children-forwarding fix for MetricCard.
- `byoc-hashbrown` — dedicated `/byoc-hashbrown` agent endpoint emits
the hashbrown JSON envelope `{ui: [{metric: {props: {...}}}, ...]}`
(NOT XML — the #4271 fix). Frontend parses via `useJsonParser` +
`useUiKit` with MetricCard / PieChart / BarChart / DealCard / Markdown.
- `multimodal` — dedicated `/multimodal` agent endpoint with
`convert_part_for_claude` that translates AG-UI `image` / `document`
parts into Claude's native Messages API shape. PDFs flatten to text
via `pypdf`. **No legacy-binary shim required** — that shim is
specific to the `@ag-ui/langgraph@0.0.27` converter and is not needed
when HttpAgent forwards modern parts to the Claude Agent SDK backend.
- `voice` — dedicated `/api/copilotkit-voice` runtime with a
`GuardedOpenAITranscriptionService` that reports a typed 401 when
`OPENAI_API_KEY` is missing (vs a silent 503). Transcription service
is written onto the V2 runtime instance directly to work around the
V1 wrapper silently dropping the service. Backend reuses the shared
Claude agent.
- `agent-config` — dedicated `/agent-config` agent endpoint that reads
`tone` / `expertise` / `responseLength` off
`forwarded_props.config.configurable.properties` and builds the
system prompt per turn. Frontend route subclasses `HttpAgent` to
repack provider `properties` into the nested configurable shape so
the wire format matches the langgraph-python reference exactly.
- `auth` — dedicated `/api/copilotkit-auth` route uses
`createCopilotRuntimeHandler` from `@copilotkit/runtime/v2` directly
so the `onRequest` hook actually fires (V1 adapter drops hooks).
Bearer-token gate returns 401 on mismatch. Includes the #4271
defaults fix: `useDemoAuth` defaults to signed-in, plus
`ChatErrorBoundary` so the page never white-screens on auth
transitions.
## Ported
### Initial pass (B2)
- `cli-start` — manifest-only entry with the framework-slug init command.
- `prebuilt-sidebar` — default `<CopilotSidebar />` against the shared agent.
- `prebuilt-popup` — default `<CopilotPopup />` against the shared agent.
- `chat-slots` — custom `welcomeScreen`, `input.disclaimer`, `messageView.assistantMessage` slots.
- `chat-customization-css` — scoped CSS variable and class overrides.
- `headless-simple``useAgent` + `useComponent` minimal custom chat surface.
### Follow-up pass (B2')
- `frontend-tools``useFrontendTool` with sync handler (change_background).
- `frontend-tools-async``useFrontendTool` with async handler (query_notes).
- `hitl-in-app` — async `useFrontendTool` HITL; `fixed inset-0` overlay
(not `createPortal`) to avoid pulling in `@types/react-dom`.
- `readonly-state-agent-context``useAgentContext` read-only context.
- `tool-rendering-default-catchall` — zero-renderer built-in default.
- `tool-rendering-custom-catchall``useDefaultRenderTool` wildcard.
- `open-gen-ui` — minimal open-ended generative UI (dedicated
`/api/copilotkit-ogui` route with `openGenerativeUI` flag).
- `open-gen-ui-advanced` — OGUI with frontend sandbox functions
(evaluateExpression, notifyHost).
- `headless-complete` — full custom chat surface built on `useAgent`,
with per-tool renderers, frontend component, and wildcard catch-all.
Points to the shared `/api/copilotkit` route (the reference points at
`/api/copilotkit-mcp-apps`; this package doesn't port mcp-apps — the
Excalidraw-MCP suggestion will surface as a catch-all tool card).
## Skipped
### Require langgraph-specific primitives (no Claude Agent SDK equivalent)
- `gen-ui-interrupt` — relies on langgraph's `interrupt()` primitive that
pauses the graph and resumes on a client-side response. Claude Agent SDK
does not expose an equivalent graph-interrupt API.
- `interrupt-headless` — same reason; this is a headless surface for
resolving a langgraph interrupt.
### Require streaming Claude extended-thinking plumbing
- `reasoning-custom`, `reasoning-default`,
`tool-rendering-reasoning-chain` — require streaming Claude extended-
thinking (reasoning) blocks as distinct AG-UI message parts. The current
`src/agents/agent.py` AG-UI bridge does not translate Anthropic
`thinking` content blocks; adding it correctly requires new event types
and a thinking-aware message buffer. Follow-up.
### Deferred — larger-scope multi-file surfaces
These are feasible on this package but each pulls in substantial
multi-file frontend infrastructure (catalogs, renderers, MCP client
glue, theme pipelines) that did not fit this pass. Left for dedicated
follow-up commits.
- `declarative-gen-ui` — A2UI BYOC catalog (Card/StatusBadge/Metric/
InfoRow/PrimaryButton) wired via `a2ui.catalog` on the provider.
- `a2ui-fixed-schema` — fixed-schema A2UI with two JSON schemas
(flights + booked) and a per-demo catalog.
- `mcp-apps` — MCP server-driven UI via activity renderers. Claude Agent
SDK supports MCP clients, but the langgraph-python reference relies on
CopilotKit runtime wiring through a dedicated
`/api/copilotkit-mcp-apps/route.ts` plus agent-side MCP client glue.
- `beautiful-chat` — 28+ supporting files (layout, canvas, generative UI
charts, hooks, theme CSS, showcase config, A2UI catalog). Porting
requires significant surface-area review that did not fit this pass.
## Follow-up buckets
- Reasoning / extended-thinking plumbing in `agent.py` (unlocks
`reasoning-custom`, `reasoning-default`,
`tool-rendering-reasoning-chain`).
- A2UI catalog demos (unlocks `declarative-gen-ui`, `a2ui-fixed-schema`).
- MCP client integration (unlocks `mcp-apps`).
- Beautiful-chat infrastructure port.