layout: every pane open/close resizes exactly ONE sibling — never the whole column. Buggy paths fixed: Alt-n inserted a weight-1 shell (whole column reflowed) — now splitBelow the active pane; stackDocLeft (file/image/tutor open with no doc yet) gave the doc a fair share (every pane shrank) — now it halves only the old top pane's slot; ttyForDir (execute from a file pane) appended a weight-1 shell to the rightmost column — now splitBelow its bottom pane; Alt-c moved a pane out without absorbVWeight (all old siblings grew) — now the sibling above absorbs first. Underneath: splitBelow/absorbVWeight/stackDocLeft snap the whole column's weights to on-screen row counts, because computeGeom's per-pane round(avail*w/vsum) let fractional weights jiggle bystanders by a row; evictLonePristineTty recomputes geometry first (a just-stacked doc has no rect). New snap tests layout-open + layout-close cover Alt-n, doc stacking, ttyForDir, Alt-c, tag Del, pty EOF, and column-width handoff. Six goldens regenerated (fileedit, images, look-file, syntax, tutor, windowops): they had frozen the fair-share/append reflow this change removes; every diff is only the doc/split pane sizing, with untouched panes' boundaries restored bit-identical (e.g. bottom pane tag back at its boot row 17 instead of pushed to 22).

1 files changed, 47 insertions, 47 deletions

diff --git a/test/snapshots/images.golden b/test/snapshots/images.golden
index b6e75fbf..16dc0bac 100644
--- a/test/snapshots/images.golden
+++ b/test/snapshots/images.golden
@@ -1,15 +1,12 @@
 == snap img-open grid=100x30 cursor=4,7
 |Kill Newcol Tutor Debug Colors NextColor Dump
 |  img /tmp/pardes-snap/images/cwd/pic.ppm Petscii   nm /tmp/pardes-snap/images/cwd Del
-|                                 🬝🬹
-|                               🬝▀█                  pic.ppm
-|                             🬝▀█
-|                           🬝▀█
-|                         🬝▀█
-|                       █🬆█
-|                     █🬆█
-|                   █🬆█
-|                 🬝🬹█
+|                              🬝🬂
+|                            🬝🬂█                     pic.ppm
+|                          🬝🬂█
+|                        🬝🬂
+|                      🬝🬂█
+|╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌
 |  nm /tmp/pardes-snap/images/cwd Del
 |
 |  pic.ppm
@@ -18,8 +15,6 @@
 |
 |    pic.ppm
 |
-|
-|
 |  nm /tmp/pardes-snap/images/cwd Del
 |
 |  pic.ppm
@@ -29,29 +24,34 @@
 |
 |
 |
+|
+|
+|
+|
+|
 == style img-open
 |0: 0-44 #969696,#2c2a3e, 45-99 d,#2c2a3e,
 |1: 0-1 d,#6e4fd0, 2-49 #969696,#2c2a3e, 50-51 d,#383c54, 52-85 #969696,#2c2a3e, 86-99 d,#2c2a3e,
-|2: 0-1 d,#2a2a2a, 2-16 d,d, 17-32 #ffffff,#ffffff, 33-33 #ffffff,#352879, 34-34 #352879,#ffffff, 35-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|3: 0-1 d,#2a2a2a, 2-16 d,d, 17-30 #ffffff,#ffffff, 31-32 #ffffff,#352879, 33-33 #352879,#ffffff, 34-34 #352879,#352879, 35-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|4: 0-1 d,#2a2a2a, 2-16 d,d, 17-28 #ffffff,#ffffff, 29-30 #ffffff,#352879, 31-31 #352879,#ffffff, 32-34 #352879,#352879, 35-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|5: 0-1 d,#2a2a2a, 2-16 d,d, 17-26 #ffffff,#ffffff, 27-28 #ffffff,#352879, 29-29 #352879,#ffffff, 30-34 #352879,#352879, 35-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|6: 0-1 d,#2a2a2a, 2-16 d,d, 17-24 #ffffff,#ffffff, 25-26 #ffffff,#352879, 27-27 #352879,#ffffff, 28-34 #352879,#352879, 35-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|7: 0-1 d,#2a2a2a, 2-16 d,d, 17-22 #ffffff,#ffffff, 23-24 #ffffff,#352879, 25-25 #352879,#ffffff, 26-34 #352879,#352879, 35-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|8: 0-1 d,#2a2a2a, 2-16 d,d, 17-20 #ffffff,#ffffff, 21-22 #ffffff,#352879, 23-23 #352879,#ffffff, 24-34 #352879,#352879, 35-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|9: 0-1 d,#2a2a2a, 2-16 d,d, 17-18 #ffffff,#ffffff, 19-20 #ffffff,#352879, 21-21 #352879,#ffffff, 22-34 #352879,#352879, 35-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|10: 0-1 d,#2a2a2a, 2-16 d,d, 17-17 #ffffff,#352879, 18-19 #352879,#ffffff, 20-34 #352879,#352879, 35-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|11: 0-1 d,#383c54, 2-35 #969696,#2c2a3e, 36-49 d,#2c2a3e, 50-51 d,#525252, 52-99 d,d,
+|2: 0-1 d,#2a2a2a, 2-19 d,d, 20-29 #ffffff,#ffffff, 30-31 #ffffff,#6c5eb5, 32-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|3: 0-1 d,#2a2a2a, 2-19 d,d, 20-27 #ffffff,#ffffff, 28-29 #ffffff,#6c5eb5, 30-30 #352879,#ffffff, 31-31 #352879,#352879, 32-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|4: 0-1 d,#2a2a2a, 2-19 d,d, 20-25 #ffffff,#ffffff, 26-27 #ffffff,#6c5eb5, 28-28 #352879,#ffffff, 29-31 #352879,#352879, 32-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|5: 0-1 d,#2a2a2a, 2-19 d,d, 20-23 #ffffff,#ffffff, 24-25 #ffffff,#6c5eb5, 26-31 #352879,#352879, 32-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|6: 0-1 d,#2a2a2a, 2-19 d,d, 20-21 #ffffff,#ffffff, 22-23 #ffffff,#6c5eb5, 24-24 #352879,#ffffff, 25-31 #352879,#352879, 32-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|7: 0-1 d,#2a2a2a, 2-19 d,d, 20-21 #ffffff,#6c5eb5, 22-22 #352879,#ffffff, 23-31 #352879,#352879, 32-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|8: 0-1 d,#383c54, 2-35 #969696,#2c2a3e, 36-49 d,#2c2a3e, 50-51 d,#525252, 52-99 d,d,
+|9: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|10: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|11: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |12: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |13: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |14: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |15: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|16: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|16: 0-1 d,#383c54, 2-35 #969696,#2c2a3e, 36-49 d,#2c2a3e, 50-51 d,#525252, 52-99 d,d,
 |17: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |18: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |19: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |20: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|21: 0-1 d,#383c54, 2-35 #969696,#2c2a3e, 36-49 d,#2c2a3e, 50-51 d,#525252, 52-99 d,d,
+|21: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |22: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |23: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |24: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
@@ -63,26 +63,26 @@
 == style term-palette
 |0: 0-44 #969696,#2c2a3e, 45-99 d,#2c2a3e,
 |1: 0-1 d,#6e4fd0, 2-49 #969696,#2c2a3e, 50-51 d,#383c54, 52-85 #969696,#2c2a3e, 86-99 d,#2c2a3e,
-|2: 0-1 d,#2a2a2a, 2-16 d,d, 17-32 #ffffff,#ffffff, 33-33 #ffffff,#352879, 34-34 #352879,#ffffff, 35-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|3: 0-1 d,#2a2a2a, 2-16 d,d, 17-30 #ffffff,#ffffff, 31-32 #ffffff,#352879, 33-33 #352879,#ffffff, 34-34 #352879,#352879, 35-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|4: 0-1 d,#2a2a2a, 2-16 d,d, 17-28 #ffffff,#ffffff, 29-30 #ffffff,#352879, 31-31 #352879,#ffffff, 32-34 #352879,#352879, 35-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|5: 0-1 d,#2a2a2a, 2-16 d,d, 17-26 #ffffff,#ffffff, 27-28 #ffffff,#352879, 29-29 #352879,#ffffff, 30-34 #352879,#352879, 35-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|6: 0-1 d,#2a2a2a, 2-16 d,d, 17-24 #ffffff,#ffffff, 25-26 #ffffff,#352879, 27-27 #352879,#ffffff, 28-34 #352879,#352879, 35-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|7: 0-1 d,#2a2a2a, 2-16 d,d, 17-22 #ffffff,#ffffff, 23-24 #ffffff,#352879, 25-25 #352879,#ffffff, 26-34 #352879,#352879, 35-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|8: 0-1 d,#2a2a2a, 2-16 d,d, 17-20 #ffffff,#ffffff, 21-22 #ffffff,#352879, 23-23 #352879,#ffffff, 24-34 #352879,#352879, 35-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|9: 0-1 d,#2a2a2a, 2-16 d,d, 17-18 #ffffff,#ffffff, 19-20 #ffffff,#352879, 21-21 #352879,#ffffff, 22-34 #352879,#352879, 35-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|10: 0-1 d,#2a2a2a, 2-16 d,d, 17-17 #ffffff,#352879, 18-19 #352879,#ffffff, 20-34 #352879,#352879, 35-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|11: 0-1 d,#383c54, 2-35 #969696,#2c2a3e, 36-49 d,#2c2a3e, 50-51 d,#525252, 52-99 d,d,
+|2: 0-1 d,#2a2a2a, 2-19 d,d, 20-29 #ffffff,#ffffff, 30-31 #ffffff,#6c5eb5, 32-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|3: 0-1 d,#2a2a2a, 2-19 d,d, 20-27 #ffffff,#ffffff, 28-29 #ffffff,#6c5eb5, 30-30 #352879,#ffffff, 31-31 #352879,#352879, 32-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|4: 0-1 d,#2a2a2a, 2-19 d,d, 20-25 #ffffff,#ffffff, 26-27 #ffffff,#6c5eb5, 28-28 #352879,#ffffff, 29-31 #352879,#352879, 32-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|5: 0-1 d,#2a2a2a, 2-19 d,d, 20-23 #ffffff,#ffffff, 24-25 #ffffff,#6c5eb5, 26-31 #352879,#352879, 32-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|6: 0-1 d,#2a2a2a, 2-19 d,d, 20-21 #ffffff,#ffffff, 22-23 #ffffff,#6c5eb5, 24-24 #352879,#ffffff, 25-31 #352879,#352879, 32-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|7: 0-1 d,#2a2a2a, 2-19 d,d, 20-21 #ffffff,#6c5eb5, 22-22 #352879,#ffffff, 23-31 #352879,#352879, 32-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|8: 0-1 d,#383c54, 2-35 #969696,#2c2a3e, 36-49 d,#2c2a3e, 50-51 d,#525252, 52-99 d,d,
+|9: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|10: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|11: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |12: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |13: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |14: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |15: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|16: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|16: 0-1 d,#383c54, 2-35 #969696,#2c2a3e, 36-49 d,#2c2a3e, 50-51 d,#525252, 52-99 d,d,
 |17: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |18: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |19: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |20: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|21: 0-1 d,#383c54, 2-35 #969696,#2c2a3e, 36-49 d,#2c2a3e, 50-51 d,#525252, 52-99 d,d,
+|21: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |22: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |23: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |24: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
@@ -94,26 +94,26 @@
 == style no-ascii
 |0: 0-44 #969696,#2c2a3e, 45-99 d,#2c2a3e,
 |1: 0-1 d,#6e4fd0, 2-49 #969696,#2c2a3e, 50-51 d,#383c54, 52-85 #969696,#2c2a3e, 86-99 d,#2c2a3e,
-|2: 0-1 d,#2a2a2a, 2-16 d,d, 17-32 #ffffff,#ffffff, 33-33 #ffffff,#352879, 34-34 #352879,#ffffff, 35-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|3: 0-1 d,#2a2a2a, 2-16 d,d, 17-30 #ffffff,#ffffff, 31-32 #ffffff,#352879, 33-33 #352879,#ffffff, 34-34 #352879,#352879, 35-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|4: 0-1 d,#2a2a2a, 2-16 d,d, 17-28 #ffffff,#ffffff, 29-30 #ffffff,#352879, 31-31 #352879,#ffffff, 32-34 #352879,#352879, 35-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|5: 0-1 d,#2a2a2a, 2-16 d,d, 17-26 #ffffff,#ffffff, 27-28 #ffffff,#352879, 29-29 #352879,#ffffff, 30-34 #352879,#352879, 35-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|6: 0-1 d,#2a2a2a, 2-16 d,d, 17-24 #ffffff,#ffffff, 25-26 #ffffff,#352879, 27-27 #352879,#ffffff, 28-34 #352879,#352879, 35-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|7: 0-1 d,#2a2a2a, 2-16 d,d, 17-22 #ffffff,#ffffff, 23-24 #ffffff,#352879, 25-25 #352879,#ffffff, 26-34 #352879,#352879, 35-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|8: 0-1 d,#2a2a2a, 2-16 d,d, 17-20 #ffffff,#ffffff, 21-22 #ffffff,#352879, 23-23 #352879,#ffffff, 24-34 #352879,#352879, 35-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|9: 0-1 d,#2a2a2a, 2-16 d,d, 17-18 #ffffff,#ffffff, 19-20 #ffffff,#352879, 21-21 #352879,#ffffff, 22-34 #352879,#352879, 35-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|10: 0-1 d,#2a2a2a, 2-16 d,d, 17-17 #ffffff,#352879, 18-19 #352879,#ffffff, 20-34 #352879,#352879, 35-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|11: 0-1 d,#383c54, 2-35 #969696,#2c2a3e, 36-49 d,#2c2a3e, 50-51 d,#525252, 52-99 d,d,
+|2: 0-1 d,#2a2a2a, 2-19 d,d, 20-29 #ffffff,#ffffff, 30-31 #ffffff,#6c5eb5, 32-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|3: 0-1 d,#2a2a2a, 2-19 d,d, 20-27 #ffffff,#ffffff, 28-29 #ffffff,#6c5eb5, 30-30 #352879,#ffffff, 31-31 #352879,#352879, 32-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|4: 0-1 d,#2a2a2a, 2-19 d,d, 20-25 #ffffff,#ffffff, 26-27 #ffffff,#6c5eb5, 28-28 #352879,#ffffff, 29-31 #352879,#352879, 32-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|5: 0-1 d,#2a2a2a, 2-19 d,d, 20-23 #ffffff,#ffffff, 24-25 #ffffff,#6c5eb5, 26-31 #352879,#352879, 32-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|6: 0-1 d,#2a2a2a, 2-19 d,d, 20-21 #ffffff,#ffffff, 22-23 #ffffff,#6c5eb5, 24-24 #352879,#ffffff, 25-31 #352879,#352879, 32-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|7: 0-1 d,#2a2a2a, 2-19 d,d, 20-21 #ffffff,#6c5eb5, 22-22 #352879,#ffffff, 23-31 #352879,#352879, 32-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|8: 0-1 d,#383c54, 2-35 #969696,#2c2a3e, 36-49 d,#2c2a3e, 50-51 d,#525252, 52-99 d,d,
+|9: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|10: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|11: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |12: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |13: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |14: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |15: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|16: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
+|16: 0-1 d,#383c54, 2-35 #969696,#2c2a3e, 36-49 d,#2c2a3e, 50-51 d,#525252, 52-99 d,d,
 |17: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |18: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |19: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |20: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
-|21: 0-1 d,#383c54, 2-35 #969696,#2c2a3e, 36-49 d,#2c2a3e, 50-51 d,#525252, 52-99 d,d,
+|21: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |22: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |23: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,
 |24: 0-1 d,#525252, 2-49 d,d, 50-51 d,#525252, 52-99 d,d,