Initial project skeleton: shared prompt, coordination, baseline

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

README.md

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+# flush-fidget
+
+Turn Orca Slicer's purge waste into a printed fidget. The target object is a
+print-in-place Flexi Cube, with random exterior colours welcome.
+
+Agents: read `PROMPT.md` first.
+
+```
+PROMPT.md          shared prompt for every agent
+COORDINATION.md    who is doing what right now
+assets/            flexi cube.stl and reference models
+recon/             read-only findings, one file per agent per topic
+patches/           changes to the Orca fork, as patch files
+tests/             baseline numbers and test slices
+```
+
+The Orca Slicer fork is a separate repository.