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Per CLAUDE.md's docs/ role split (todo = pending, done = shipped into the SDD/code): all seven Graph Engineering series items with a real implementation (B, D, E, F, G, H -- A had no separate doc, resolved directly in graphlemon_architecture.md; C is explicitly won't-do) now have their requirements+design docs moved from docs/todo/ to docs/done/, git mv'd to preserve history. Every cross-reference to the 12 moved files -- across the other moved docs themselves, graph-engineering-open-items.md, 2 Skill files, and 9 src/*.py docstrings/comments -- updated from docs/todo/<file> to docs/done/<file>. Verified no stale docs/todo/ references to any of the 12 filenames remain anywhere in the repo. graph-engineering-open-items.md itself stays in docs/todo/ (not moved) -- it's a living index that keeps gaining new entries from later comparison-note/gap-analysis passes (H itself was added this way, and a new item already appeared while this cleanup was in progress), not a single finished conclusion. Its own header now reflects that all of A/B/D/E/F/G/H are done and explains why it wasn't moved. Also fixed two pre-existing stray path references (missing todo/done/ prefix entirely, predating this cleanup) in its G section. Full src suite (625 tests) passes -- this is a pure documentation/comment change, no behavior touched. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>