Render Agent/Explore/Plan tool calls in a visually distinct collapsible
container with colored left border, replacing the generic tool card. Parse
subagent JSONL transcripts from {sessionId}/subagents/ to extract and
display the actual tool calls (Bash, Read, Grep, etc.) the subagent
executed, reusing the existing ToolCallPart for consistent appearance.
- Add AgentToolCallPart component with collapsible body, prompt section,
execution stats, and nested tool call list via render prop injection
- Add AgentExecutionStats and AgentToolCall types (Rust + TypeScript)
- Parse toolUseResult.agentId to locate and read subagent JSONL files
- Validate agentId against path traversal before filesystem access
- Pass agentStats through adapter for both ID-matched and positional
tool result pairing
- Strip agentStats in nested render to prevent recursive Agent expansion
- Add i18n keys for agent UI labels across all 10 languages
Live tool calls that produce output while running (e.g. streaming bash
stdout from Codex) now render their partial output in real time instead
of appearing blank until the tool completes. The tool card keeps its
running visual state — spinner and 24KB tail truncation — while chunks
arrive, and transitions to the completed state once the final status
lands. A WeakMap keyed on the ACP reducer's chunks-array identity
memoizes the joined output so repeated renders don't re-run O(n) string
concatenation.
