Product milestone — Session NN

Copy to docs/milestone-NN.md in your product repo; index it in docs/progress.md. See the milestone map.

Goal and acceptance criteria:
Issue, branch, PR URL and exact reviewed commit:
What works; what remains design only:
Evidence: steps, synthetic input, expected/actual result, artifact paths:
OS, shell, browser, app revision, viewport if relevant:
Automated/manual checks actually run; failures and limits:
AI client/version, exact model ID, host/runtime/quantization if applicable:
Important AI correction or rejected suggestion and why:
Milestone and cumulative cost, or “not measured” with reason:
Human feedback and resulting change (no private notes):
Business/QA lesson applied:
Next small issue and instructor question:
Public-safety check: files, screenshots, diff, data and licenses inspected:

No chat dump or billing screenshot needed. Do not invent tokens, costs or execution. $0 local metered API fees exclude hardware/electricity. Public repository visibility is not consent to AI-provider review.