What shipped, release by release

The first real release: the core framework plus a production-hardening pass.

Added

• Async ReAct agent loop with a single streaming code path (Agent config and factory, AgentSession run state); blocking and streaming run().
• Provider-neutral model layer and an OpenAI-compatible adapter with retries.
• @tool decorator with JSON Schema generation, argument validation, and per-tool metadata (timeout, parallel_safe, max_output_chars).
• Typed memory (TaskStep / ActionStep / FinalStep) with JSON persistence and load validation (MemoryLoadError).
• Streaming events, a print_events renderer, and a terminal run status (completed / interrupted / max_steps).
• Progressive-disclosure skills (SKILL.md) with a built-in load_skill tool.
• An exception hierarchy under AgentlingError, public API exports, and __all__.
• Timeouts (tool_timeout, model_timeout), prompt cancellation, sync tools run off the event loop, optional error redaction (redact_errors), cumulative token usage on the final event, and a context_manager hook for long runs.