xiaoski
0c0d0c1443
Implement parallel tool execution in AgentLoop, following the approach used in Nanobot (_partition_tool_batches) and Zeroclaw (parallel_tools). Key changes: - partition_tool_batches(): group tool calls into batches based on concurrency_safe flag. Safe tools run in parallel via join_all; exclusive tools (e.g. bash) run in their own sequential batch. - execute_tools(): now uses batching instead of flat sequential loop. - CalculatorTool: add read_only() -> true so it participates in parallel batches (it has no side effects, so concurrency_safe = true). 4 unit tests added covering: mixed safe/exclusive, all-safe single batch, all-exclusive separate batches, unknown tool defaults.
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