docs(TODO-1.0): fold third answer round — spline point ceiling 128, right-click delete; doc fully settled

TODO-1.0.md

@@ -17,8 +17,12 @@ questions**.
 
 A **second follow-up round** (2026-07-28, same day) settled nearly all of the
 remainder. Each item carries that round's verbatim as a third provenance block;
-answers are folded the same way (marked *settled by second follow-up*). Items 1
-and 2 now have no open questions; item 3 retains two narrow ones.
+answers are folded the same way (marked *settled by second follow-up*).
+
+A **third follow-up round** (2026-07-28, same day) settled item 3's last two
+questions (point-count ceiling; delete gesture — reversing the second round's
+alt-click answer back to right-click). **All three items now have no open
+questions; the document is fully settled at the product level.**
 
 Ordering note: item 1's curve/overlay treatment explicitly anticipates item 2's
 filter envelope ("filter to be added"), and item 3 layers on both. They can land
@@ -277,6 +281,14 @@ AHDSR envelope, and make the knob-deck row read in signal-flow order.
 > left click add, alt-click delete, cntrl-click toggles point hard or soft.
 > spline active -> stage knobs disabled.
 
+**Daniel's third follow-up (verbatim, 2026-07-28).**
+
+> oh, maybe 64? is that way too much?  I don't want to limit from long rhythmic
+> phrases, which require a high resolution to be interesting
+>
+> oh, do right click delete instead for the spline
+> 128 then
+
 **Intent.** Offer a free-drawn alternative to every staged envelope: the user
 switches any EG from Staged to Spline mode and draws the contour directly, with
 the monotonic-spline machinery already proven by the velocity curve — enhanced
@@ -299,11 +311,22 @@ so sharp corners are possible, not everything smoothed.
   the actual sample visually 1:1** — the contour's full width maps directly
   onto the displayed sample. Consequently a different-length capture rescales
   the stored contour to its own length. *(Settled by second follow-up.)*
-- **Point-editing grammar.** **Left-click adds a point; alt-click deletes a
-  point; control-click toggles a point hard/smooth.** Alt-click-delete
-  supersedes the earlier speculation that the velocity-curve popup's
-  right-click-delete grammar would be reused. *(Settled by second follow-up;
-  control-click hard/smooth confirms the original ask.)*
+- **Point-editing grammar.** **Left-click adds a point; right-click deletes a
+  point; control-click toggles a point hard/smooth.** *(Settled by third
+  follow-up; control-click hard/smooth confirms the original ask.)* Note for
+  readers of the prior revision: the second follow-up answered alt-click
+  delete; the third follow-up **supersedes that** with right-click delete —
+  which matches the velocity-curve popup's already-shipped right-click node
+  delete, giving one point-editing grammar across both spline consumers.
+- **Point-count ceiling: 128.** A spline contour holds at most **128 points**
+  (floor: the two endpoints implied by full-length coverage). Daniel floated
+  64 and raised it to 128 explicitly so the cap does not limit **long rhythmic
+  phrases, which require high resolution to be interesting** — at roughly two
+  points per articulation event, 64 points is about two bars of 16ths and 128
+  about four. The ceiling is a musical bound, not a performance one (segment
+  lookup is logarithmic; on-screen the editor's 8 px minimum node separation
+  is the practical density limit anyway). **An engineer tempted to lower this
+  number should read that motivation first.** *(Settled by third follow-up.)*
 - **Staged controls disabled while Spline is active.** While a Spline EG is
   active, that envelope's **staged segment knobs are disabled** — inert, not
   merely inaudible — including their item-1 inner curve dials (the dial is
@@ -338,25 +361,26 @@ so sharp corners are possible, not everything smoothed.
 
 **Open questions.**
 
-- **Point-count bounds.** The add/delete/toggle gestures are settled, but any
-  minimum/maximum point count is unstated (a floor of two endpoints seems
-  implied by full-length coverage; a ceiling, if any, is Daniel's call).
-- **Velocity-curve popup gesture convergence.** The Spline-EG grammar is
-  alt-click delete, but the existing velocity-curve popup shipped with
-  right-click node delete. Since the enhanced spline serves both, does the
-  popup migrate to the alt-click grammar for consistency, keep right-click, or
-  accept both?
+- None remaining — both prior questions closed by the third follow-up round.
+  Point-count bounds: ceiling 128, floor two endpoints. Gesture convergence:
+  resolved by the delete-gesture reversal itself — the Spline EG's right-click
+  delete now matches the velocity-curve popup's shipped right-click node
+  delete, so **no migration is needed on either side**; one grammar serves
+  both consumers.
 
 **Acceptance criteria.**
 
 - Each of the pitch, filter, and amp EGs offers a Staged/Spline mode switch;
   in Spline mode the overlay (via the item-1 radio switch) shows and edits the
   drawn contour, and played notes audibly follow it.
-- Left-click on the contour adds a point at that position; alt-click on a
+- Left-click on the contour adds a point at that position; right-click on a
   point deletes it; control-click toggles it hard/smooth. Points are smooth by
   default; a hard point renders a visible sharp angle with no smoothing on
   either adjacent segment, and the discontinuous slope is audible where the
   modulation target makes it so (e.g. a pitch EG corner).
+- A contour accepts points up to the **128-point ceiling**; attempting to add
+  beyond it is refused without disturbing the existing contour. The two
+  endpoints cannot be deleted (full-length coverage always holds).
 - A contour of several segments joined at hard points plays back over the full
   sample length exactly as drawn — including contours that rise and fall
   freely (no globally-monotone restriction), with no overshoot between any
@@ -375,4 +399,6 @@ so sharp corners are possible, not everything smoothed.
   switch back — the staged values are exactly as left; switch forward again —
   the spline contour is exactly as drawn. Both survive save/reload.
 - The velocity→amp transfer-curve editor supports the same control-click
-  hard/smooth toggle with identical rendering behavior.
+  hard/smooth toggle with identical rendering behavior, and its existing
+  right-click node delete matches the Spline EG's delete gesture unchanged —
+  one point-editing grammar across both consumers.