v0.4.0 — ADK Sample Ports, API Consistency, Pipeline Operators

ADK Sample Ports

• 6 complex multi-agent samples ported from google/adk-samples to fluent API
• LLM Auditor, Financial Advisor, Short Movie, Deep Search, Brand Search, Travel Concierge
• Side-by-side comparison documentation with metrics
• 76% reduction in agent definition files, 100% elimination of AgentTool boilerplate

Pipeline Operators

• Deep Search sample uses >>, * until(), and @ Feedback operators
• Eliminates 30-line EscalationChecker(BaseAgent) subclass with one-line predicate
• 61% reduction in pipeline composition code

API Consistency Improvements

• .sub_agent() as canonical method (deprecates .member() with warning)
• .include_history() alias alongside .history() short form
• FanOut.step() for consistency with Pipeline/Loop API
• Improved docstrings: .tool() vs .tools(), .output_schema() vs @, .tap(), .timeout()

Generator Pipeline

• deprecation_alias behavior for generating deprecation wrappers
• Per-alias field_docs support for alias-specific docstrings
• _EXTRA_ALIASES table for secondary alias mappings
• All changes persist across regeneration via seed.toml

Cookbook

• #43: Primitives showcase — tap, expect, gate, Route, S.* composed in a single pipeline

Aggregate Metrics (6 Samples)

Metric	Native ADK	Fluent API	Reduction
Agent definition files	25	6	76%
Total files	70+	18	74%
Directories	35+	6	83%
AgentTool(agent=...) calls	20+	0	100%