v0.1.43

Added

• Source lines embedded in bundles — ## Source sections in concept files now include the actual source code as a fenced code block (with language syntax hint), not just line number references. Fixes Render dashboard and viz showing "Lines N-M in file.py" as literal text. (okf/generator.py)

Changed

• _body() accepts optional source_dir param to read and embed source lines during generation.
• render_concept() and write_bundle() pass source_dir through for source embedding.

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