leonard_agent 0.1.3

Web-compatible harness library.

Changelog

0.1.3

• HandshakeResult gains a capabilities field: host-level features that are reachable but are NOT namespaced tools (so they never appear under extensions) — notably screenshot. The handshake parse reads the new capabilities array and is tolerant of its absence (older bindings parse to an empty list). Lets a driver list screenshot where agents look instead of concluding "no such capability" from the tool manifest alone.

0.1.2

• Adopt dartantic as the model-backend seam: a single DartanticModelProvider drives any backend — swift-infer via lenny's custom ChatModel, Anthropic and OpenAI via stock dartantic models. The hand-rolled per-provider classes are removed; the loop keeps retry ownership and the SchemaRejection contract.
• Anthropic backend defaults are now compatible with extended thinking: a non-forcing tool_choice (auto) and no temperature override. Anthropic rejects a forcing tool_choice or any non-1 temperature while thinking is enabled, so the previous defaults returned request-time 400s when driving Claude. Thinking stays on; the driver's retry covers a rare prose-only turn.
• Fix (Anthropic): per-turn observation context is no longer dropped. The dartantic Anthropic mapper serializes only the tool_result block of a tool-bearing user message and discards sibling text parts, so from turn 1 on the model never saw the observation — it was driven blind after the first turn (the swift-infer path is unaffected; its mapper keeps the text). The Anthropic backend now folds the observation + diff into the tool_result body so the model sees the live screen every turn.
• Observation: expose scroll extent on scrollable nodes.

0.1.1

• Fix: bound runaway model output. The swift-infer provider now aborts a response once it streams a large amount of reasoning text with no tool call in sight, surfacing a retryable SchemaRejection instead of letting weaker models ruminate all the way to max_tokens — the "endless stream, no tool call" failure. The loop retries with a fresh sample.

0.1.0

Initial release.