Made proxy done and error events carry finalized assistant content so provider-only blocks survive event reconstruction.
Covered Anthropic native web-search history restored after live events omitted the opaque blocks.
Fixes#6703
- Migrated internal streaming state from string-based properties to symbol-keyed properties for improved data isolation and safety.
- Replaced the deprecated `stripVariant` utility with centralized `clearStreamingPartialJson` and symbol-specific helper methods across all provider implementations.
- Implemented `stripStreamingBlockSymbols` and updated deep equality checks to ensure metadata does not interfere with content comparisons.
- Standardized streaming metadata access through a new `block-symbols` utility module.
Address review feedback: downstream renderers (event-controller.ts:535)
read content.partialJson during toolcall_delta to pace streaming
previews (bash env assignments, write/edit smooth streaming).
Revised approach:
- toolcall_start: initialize partialJson on content via typed
ToolCall & { partialJson: string } intersection (not as any)
- toolcall_delta: accumulate in side-channel Map, write onto content
via typed intersection cast
- toolcall_end: delete partialJson from content + side-channel map
- done/error: scrubPartialJson() cleans any remaining blocks that
never got toolcall_end (the original leak bug, now fixed for all
terminal paths)
Added test verifying partialJson IS present during streaming and
IS absent after completion.
streamProxy stored internal partialJson streaming state directly on typed
ToolCall objects via 4 'as any' casts. If toolcall_end was skipped (stream
error, early done), the field leaked into the final AssistantMessage content,
corrupting downstream serialization.
Replace with a side-channel Map<number, string> keyed by contentIndex:
- toolcall_start initializes the map entry
- toolcall_delta accumulates into it
- toolcall_end cleans it up
The typed ToolCall object never carries non-spec fields. All 4 'as any'
casts are eliminated.
Added 4 contract tests covering argument parsing, partialJson isolation on
normal completion, partialJson isolation when toolcall_end is missing, and
multiple concurrent tool calls with interleaved deltas.
roboomp