e570886883
Wires the existing chat widget to the `ChatProvider` trait
(commit `548c5336`). The old `send()` echo-stub stays for the
zero-provider fallback path; `send_via_provider(provider,
system_prompt, max_tokens)` is the real entry that:
- Pushes the input as a `ChatRole::User` message
- Builds a `ChatRequest` and calls `provider.send(req)`
- Drains the delta iterator into a single accumulated assistant
message (TextDelta + Thinking concatenate; Error replaces with
"error: ..."; Done breaks the loop; ToolUse is ignored — that
flow belongs to the agent runtime port)
- Returns the delta count for streaming-progress reporting
Synchronous wrapper — the caller polls the iterator to completion.
A future async-capable widget can replace the inner loop with one
delta per render frame; the trait signature already returns an
`Iterator + Send`.
Tests (3): EchoProvider streams two text fragments → assistant
body "Hello, world!"; provider error surfaces as assistant body
"error: rate limited"; empty input is a no-op.
#6 AI chat now ~25% — types + trait + chat-widget integration
working end-to-end with a test double. Real HTTP transport
(reqwest + Anthropic / OpenAI-compat / Ollama backends) is the
remaining multi-week port — but the seam is in place.
Tests total: 239 shell-core (+3). Wasm32 build clean.
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| openpencil-app | ||
| openpencil-desktop | ||
| openpencil-shell-core | ||
| openpencil-shell-native | ||
| openpencil-shell-web | ||
| pen-codegen | ||
| pen-core | ||
| pen-engine | ||
| pen-figma | ||
| pen-types | ||
| wasm-libc-shim | ||
| CLAUDE.md | ||