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+# Step 1 — Implementation Detail
+
+1. Added docs/agent-specification.md defining inputs, outputs, workflow, diagram requirements, validation, and error handling
+2. Implemented validation.py for required fields, array types, and draw.io structural markers
+3. Implemented generator.py with TSD sections, assumptions, acceptance criteria, manifest, and mxGraphModel XML
+4. Implemented cli.py to emit tsd.md, architecture.drawio, and manifest.json
+5. Added config/agent.json and examples/requirements.json