Reference Technical specifications, compliance matrices, schemas, and API references Layer 1: Atom Protocol (Foundation) Atom Sourcing Behavioral specification for Atom Sourcing Atom Transaction Protocol Behavioral specification for Atom Transaction Protocol Git Storage Format Behavioral specification for Git Storage Format Layer 2: Eos Build Engine (Evaluation) Eos Build Engine Behavioral specification for Eos Build Engine Eos Build Scheduler Behavioral specification for Eos Build Scheduler Eos Network Protocol Behavioral specification for Eos Network Protocol Executor Sandbox Contract (Primary FHS Executor) Behavioral specification for Executor Sandbox Contract (Primary FHS Executor) Layer 3: Ion CLI (User-facing) Ion Manifest Behavioral specification for Ion Manifest Ion Resolution Behavioral specification for Ion Resolution Lock File Schema Behavioral specification for Lock File Schema Cross-Cutting & System Level Aliased URL Resolution Behavioral specification for Aliased URL Resolution Ion–Eos Contract Behavioral specification for Ion–Eos Contract Layer Boundary Constraints Behavioral specification for Layer Boundary Constraints Compliance & Tooling Compliance Annotation Format & Schema Reference guide for the Axios codebase compliance annotation syntax and JSON database schema Spec Compliance Matrix Automated compliance status of codebase implementations against specifications