dio-summarize-only-the-deltas-since-last-checkpoint

From this conversation (and artifacts already in context), reply with only:

changed

• item — what changed (one line)

unchanged

• item still true (one line each — keep brief)

new risks

• risk or concern introduced since the last checkpoint (one line)

Rules:

• Deltas only — not a full thread recap.
• If no clear checkpoint exists, treat the start of the current topic as the baseline and say so in one line under ## changed.
• Omit empty sections.