Step 1 — Implementation Detail

Added docs/agent-specification.md defining inputs, outputs, workflow, diagram requirements, validation, and error handling
Implemented validation.py for required fields, array types, and draw.io structural markers
Implemented generator.py with TSD sections, assumptions, acceptance criteria, manifest, and mxGraphModel XML
Implemented cli.py to emit tsd.md, architecture.drawio, and manifest.json
Added config/agent.json and examples/requirements.json