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+# Mainline Documentation Summary
+
+## Core Architecture
+- [Pipeline Architecture](PIPELINE.md) - Pipeline stages, capability resolution, DAG execution
+- [Graph-Based DSL](graph-dsl.md) - New graph abstraction for pipeline configuration
+
+## Pipeline Configuration
+- [Presets Usage](presets-usage.md) - Creating and using pipeline presets
+- [Graph DSL](graph-dsl.md) - Graph-based pipeline definition (TOML, Python, CLI)
+
+## Feature Documentation
+- [Positioning Analysis](positioning-analysis.md) - Positioning modes and tradeoffs
+- [Pipeline Introspection](pipeline_introspection.md) - Live pipeline visualization
+
+## Implementation Details
+- [Graph System Summary](GRAPH_SYSTEM_SUMMARY.md) - Complete implementation overview