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Week of May 26, 2026

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Agent Client 0.19.0

JSONL trace file support. ClaudeAgentModel now writes durable trace files during agent execution — tool calls, thinking blocks, text, and result metrics, flushed per event. Set traceDir on the builder or agent-client.claude.trace-dir in Spring Boot config. Each invocation writes one uniquely-named JSONL file, and the path is exposed via providerFields.get("tracePath").
  • TraceTarget record pairs run ID with trace file path
  • Fail-fast on invalid trace directory (before client setup)
  • Full UUID in filenames for collision safety
  • Claude Reference | Source

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Agent Workflow 0.8.0

Trace file capture through the workflow journal. AgentClientStep propagates trace paths from the agent model into StepTransition and journal events. Every tool call in a multi-step workflow is now traceable back to a specific JSONL file.
  • ExecutionResult(text, tracePath) — new return type from AgentClient.executeForResult()
  • AgentContext.TRACE_PATH — well-known context key, cleared per step
  • JdbcTraceRecorder — trace_path column in step_transitions table
  • What’s New | Trace Capture Guide | Source

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ACP Java SDK 0.12.0

7 new protocol methods. Session lifecycle (list, close, resume) is now stable. Elicitation, fork, and config options land as unstable with the new @UnstableAcpApi marker.

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AgentWorks BOM 1.2.0

Coordinated version bump: agent-client 0.19.0, agent-workflow 0.8.0, agent-journal 1.2.0, ACP Java SDK 0.12.0, and all other managed artifacts.

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Week of May 19, 2026

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Agent Workflow 0.7.0

Managed Agents as a step runtime. ManagedAgentStep delegates workflow steps to Anthropic’s Managed Agents API. The workflow graph stays in charge — specific steps run in Anthropic’s cloud sandbox.

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Agent Client 0.18.0

Migration to markpollack org. Package rename from org.springaicommunity.agents to io.github.markpollack, BSL license, standalone POM.