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Release Notes - v1.18.1

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Bug Fixes

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Agent Event Status Fix

• AgentFinished event now correctly reports status: completed (or failed) instead of in_progress when agent terminates
• The status is determined based on the StopReason from continuation criteria evaluation

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Duplicate Event Fix

• Fixed duplicate ContinuationEvaluated events being emitted during agent execution
• Removed redundant hasNextStep() check from StepByStep::nextStep()

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AgentBuilder maxRetries Fix

• AgentBuilder::withMaxRetries() now actually works - the value is passed to ToolCallingDriver via inference retry policy
• Previously the property was set but never used

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AbstractAgent Event Handler Fix

• Fixed AbstractAgent::build() returning stale agent instance without the configured event handler
• Event handlers and listeners set via withEventHandler(), wiretap(), onEvent() now correctly propagate to the built agent

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Static Analysis Improvements

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PHPStan Level 8 Compliance

• Added callable signatures to ContentParts and MessageList methods (map, reduce, filter)
• Added proper Closure signatures to MockTool and IdempotencyMiddleware
• Added @param class-string annotations to SchemaDefinition
• Fixed array type annotations in Task, TaskList, TodoReminderProcessor
• Fixed ReActDriver::withCachedContext() parameter passing
• Fixed DeterministicAgentDriver array key type issues
• Removed redundant int casts in retry policy classes
• Added Agent::isStateChanged() override to prevent spurious iterator yields

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Psalm Compliance

• Added missing #[\Override] attributes across codebase
• Added template parameters to IteratorAggregate implementations
• Fixed namespace issues in ResearchSubagentTool
• Added ExecutionPolicy::default() static method