tag columns are the WHOLE rendered tag: h/j/k/l walk taglines, the path selects but never edits

5 files changed, 832 insertions, 3 deletions

diff --git a/test/snapshots/images.snap b/test/snapshots/images.snap
index 9c510bed..e31d57ec 100644
--- a/test/snapshots/images.snap
+++ b/test/snapshots/images.snap
@@ -36,9 +36,12 @@ key a
 stable 700 15000
 snap no-ascii
 # the tag takes an edit like any other pane's now — nothing live left in it to
-# protect, so the image early-return in enterTagEdit is gone
-press left 20 2
-release left 20 2
+# protect, so the image early-return in enterTagEdit is gone. Col 42 is the
+# FIRST EDITABLE column (right after "img <path>"): a tag column is a column of
+# the whole rendered tag, and the live prefix is read-only, so a click at col 20
+# would land in the path and the typing below would be inert.
+press left 42 2
+release left 42 2
 stable 400 5000
 text Zork
 stable 400 5000
diff --git a/test/snapshots/tagnav.golden b/test/snapshots/tagnav.golden
new file mode 100644
index 00000000..2b00eba5
--- /dev/null
+++ b/test/snapshots/tagnav.golden
@@ -0,0 +1,372 @@
+== snap start grid=100x30 cursor=7,2
+|Kill Newcol Tutor Debug NextColor Dump
+|  NOR /tmp/pardes-snap/tagnav/cwd/w.txt Save Del    NOR /tmp/pardes-snap/tagnav/cwd Del
+|     1 alpha
+|     2 beta                                         w.txt
+|     3 gamma
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|  NOR /tmp/pardes-snap/tagnav/cwd Del
+|
+|  w.txt
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+== snap colon grid=100x30 cursor=39,1
+|Kill Newcol Tutor Debug NextColor Dump
+|  NOR /tmp/pardes-snap/tagnav/cwd/w.txt Save Del    NOR /tmp/pardes-snap/tagnav/cwd Del
+|     1 alpha
+|     2 beta                                         w.txt
+|     3 gamma
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|  NOR /tmp/pardes-snap/tagnav/cwd Del
+|
+|  w.txt
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+== snap right-tag grid=100x30 cursor=83,1
+|Kill Newcol Tutor Debug NextColor Dump
+|  NOR /tmp/pardes-snap/tagnav/cwd/w.txt Save Del    NOR /tmp/pardes-snap/tagnav/cwd Del
+|     1 alpha
+|     2 beta                                         w.txt
+|     3 gamma
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|  NOR /tmp/pardes-snap/tagnav/cwd Del
+|
+|  w.txt
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+== snap left-tag grid=100x30 cursor=39,1
+|Kill Newcol Tutor Debug NextColor Dump
+|  NOR /tmp/pardes-snap/tagnav/cwd/w.txt Save Del    NOR /tmp/pardes-snap/tagnav/cwd Del
+|     1 alpha
+|     2 beta                                         w.txt
+|     3 gamma
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|  NOR /tmp/pardes-snap/tagnav/cwd Del
+|
+|  w.txt
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+== snap down-tag grid=100x30 cursor=33,16
+|Kill Newcol Tutor Debug NextColor Dump
+|  NOR /tmp/pardes-snap/tagnav/cwd/w.txt Save Del    NOR /tmp/pardes-snap/tagnav/cwd Del
+|     1 alpha
+|     2 beta                                         w.txt
+|     3 gamma
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|  NOR /tmp/pardes-snap/tagnav/cwd Del
+|
+|  w.txt
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+== snap up-tag grid=100x30 cursor=39,1
+|Kill Newcol Tutor Debug NextColor Dump
+|  NOR /tmp/pardes-snap/tagnav/cwd/w.txt Save Del    NOR /tmp/pardes-snap/tagnav/cwd Del
+|     1 alpha
+|     2 beta                                         w.txt
+|     3 gamma
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|  NOR /tmp/pardes-snap/tagnav/cwd Del
+|
+|  w.txt
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+== snap up-edge grid=100x30 cursor=39,1
+|Kill Newcol Tutor Debug NextColor Dump
+|  NOR /tmp/pardes-snap/tagnav/cwd/w.txt Save Del    NOR /tmp/pardes-snap/tagnav/cwd Del
+|     1 alpha
+|     2 beta                                         w.txt
+|     3 gamma
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|  NOR /tmp/pardes-snap/tagnav/cwd Del
+|
+|  w.txt
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+== snap arrows-still-motion grid=100x30 cursor=41,1
+|Kill Newcol Tutor Debug NextColor Dump
+|  NOR /tmp/pardes-snap/tagnav/cwd/w.txt Save Del    NOR /tmp/pardes-snap/tagnav/cwd Del
+|     1 alpha
+|     2 beta                                         w.txt
+|     3 gamma
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|  NOR /tmp/pardes-snap/tagnav/cwd Del
+|
+|  w.txt
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+== snap back-to-body grid=100x30 cursor=7,2
+|Kill Newcol Tutor Debug NextColor Dump
+|  NOR /tmp/pardes-snap/tagnav/cwd/w.txt Save Del    NOR /tmp/pardes-snap/tagnav/cwd Del
+|     1 alpha
+|     2 beta                                         w.txt
+|     3 gamma
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|  NOR /tmp/pardes-snap/tagnav/cwd Del
+|
+|  w.txt
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+== snap tty-on grid=100x30 cursor=54,4
+|Kill Newcol Tutor Debug NextColor Dump
+|  NOR /tmp/pardes-snap/tagnav/cwd/w.txt Save Del    TTY /tmp/pardes-snap/tagnav/cwd Del
+|     1 alpha                                        $ ls
+|     2 beta                                         w.txt
+|     3 gamma                                        $
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|  NOR /tmp/pardes-snap/tagnav/cwd Del
+|
+|  w.txt
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+== snap tty-tag grid=100x30 cursor=83,1
+|Kill Newcol Tutor Debug NextColor Dump
+|  NOR /tmp/pardes-snap/tagnav/cwd/w.txt Save Del    NOR /tmp/pardes-snap/tagnav/cwd Del
+|     1 alpha
+|     2 beta                                         w.txt
+|     3 gamma
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|  NOR /tmp/pardes-snap/tagnav/cwd Del
+|
+|  w.txt
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+== snap tty-restored grid=100x30 cursor=54,4
+|Kill Newcol Tutor Debug NextColor Dump
+|  NOR /tmp/pardes-snap/tagnav/cwd/w.txt Save Del    TTY /tmp/pardes-snap/tagnav/cwd Del
+|     1 alpha                                        $ ls
+|     2 beta                                         w.txt
+|     3 gamma                                        $
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|  NOR /tmp/pardes-snap/tagnav/cwd Del
+|
+|  w.txt
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
diff --git a/test/snapshots/tagnav.snap b/test/snapshots/tagnav.snap
new file mode 100644
index 00000000..6ba86c08
--- /dev/null
+++ b/test/snapshots/tagnav.snap
@@ -0,0 +1,75 @@
+# h/j/k/l ON A TAGLINE move focus BETWEEN taglines. A tag is a place in the
+# LAYOUT, not just a line of text, so the four letters walk the layout and land
+# on the neighbour's TAG (top row of the window), still in normal mode — you
+# walk the taglines and never drop through a body. They run the SAME
+# Left/Down/Up/Right builtins `SPC w h/j/k/l` and `Ctrl-w h/j/k/l` run: one
+# focusDir, three routes to it. The ARROWS keep the in-tag grapheme motion, so
+# no capability was traded away.
+#
+# Evidence is the `cursor=` header (the ACTIVE pane's cursor, which while a tag
+# is focused sits on THAT pane's tag row) plus the tag text itself: a focused
+# tag renders its owner's mode, so NOR means the tag is in normal mode and the
+# pane we left is back in its body mode.
+file w.txt alpha\nbeta\ngamma
+start 30 100 w.txt
+wait 8000 Kill Newcol
+wait 8000 w.txt
+stable 700 20000
+# Alt-n: a shell below the file, so the left column has two rows and every
+# direction has somewhere to go
+key a-n
+stable 700 15000
+key space w k
+stable 400 5000
+snap start
+# `:` -> the file's OWN tagline, normal mode, parked at the tail's start
+key :
+stable 400 5000
+snap colon
+# l -> right, onto the launch shell's TAGLINE (not its body)
+key l
+stable 400 5000
+snap right-tag
+# h -> back left onto the file's tagline
+key h
+stable 400 5000
+snap left-tag
+# j -> down onto the tagline of the shell under the file
+key j
+stable 400 5000
+snap down-tag
+# k -> back up onto the file's
+key k
+stable 400 5000
+snap up-tag
+# k again: nothing above the file. focusDir leaves `active` alone, so the move
+# is a plain no-op and the tag KEEPS focus — you stay exactly where you were.
+key k
+stable 400 5000
+snap up-edge
+# the arrows are still in-tag motion: two rights walk two columns of the tail
+key right right
+stable 400 5000
+snap arrows-still-motion
+key esc
+settle 700
+stable 400 5000
+snap back-to-body
+# A TERMINAL MUST NOT LOSE ITS TTY MODE. Put the launch shell in raw tty mode
+# (Ctrl-b), come back, then hop onto its tagline and off again: exitTagEdit
+# restores the body mode the tag hijacked, so its prefix reads TTY again.
+key c-w l
+stable 400 5000
+key c-b
+stable 700 15000
+snap tty-on
+key c-w h
+stable 400 5000
+key :
+key l
+stable 400 5000
+snap tty-tag
+key esc
+settle 700
+stable 400 5000
+snap tty-restored
diff --git a/test/snapshots/tagpath.golden b/test/snapshots/tagpath.golden
new file mode 100644
index 00000000..0b073a8c
--- /dev/null
+++ b/test/snapshots/tagpath.golden
@@ -0,0 +1,310 @@
+== snap start grid=100x30 cursor=7,2
+|Kill Newcol Tutor Debug NextColor Dump
+|  NOR /tmp/pardes-snap/tagpath/cwd/c.txt Save Del   NOR /tmp/pardes-snap/tagpath/cwd Del
+|     1 line 1
+|     2 line 2                                       c.txt
+|     3 line 3
+|     4 line 4
+|     5
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+== snap colon grid=100x30 cursor=40,1
+|Kill Newcol Tutor Debug NextColor Dump
+|  NOR /tmp/pardes-snap/tagpath/cwd/c.txt Save Del   NOR /tmp/pardes-snap/tagpath/cwd Del
+|     1 line 1
+|     2 line 2                                       c.txt
+|     3 line 3
+|     4 line 4
+|     5
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+== snap col0 grid=100x30 cursor=2,1
+|Kill Newcol Tutor Debug NextColor Dump
+|  NOR /tmp/pardes-snap/tagpath/cwd/c.txt Save Del   NOR /tmp/pardes-snap/tagpath/cwd Del
+|     1 line 1
+|     2 line 2                                       c.txt
+|     3 line 3
+|     4 line 4
+|     5
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+== snap sel-nor grid=100x30 cursor=5,1
+|Kill Newcol Tutor Debug NextColor Dump
+|  NOR /tmp/pardes-snap/tagpath/cwd/c.txt Save Del   NOR /tmp/pardes-snap/tagpath/cwd Del
+|     1 line 1
+|     2 line 2                                       c.txt
+|     3 line 3
+|     4 line 4
+|     5
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+== snap sel-path grid=100x30 cursor=39,1
+|Kill Newcol Tutor Debug NextColor Dump
+|  NOR /tmp/pardes-snap/tagpath/cwd/c.txt Save Del   NOR /tmp/pardes-snap/tagpath/cwd Del
+|     1 line 1
+|     2 line 2                                       c.txt
+|     3 line 3
+|     4 line 4
+|     5
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+== style sel-path
+|0: 0-37 #949494,#121212, 38-99 d,#121212,
+|1: 0-1 d,#626262, 2-4 #949494,#121212, 5-39 #d8c8a8,#4a3a1e, 40-48 #949494,#121212, 49-49 d,#121212, 50-51 d,#262626, 52-87 #949494,#121212, 88-99 d,#121212,
+|2: 0-1 d,#444444, 2-6 #626262,#080808, 7-12 #bdbdbd,#080808, 13-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|3: 0-1 d,#444444, 2-6 #626262,#080808, 7-12 #bdbdbd,#080808, 13-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|4: 0-1 d,#444444, 2-6 #626262,#080808, 7-12 #bdbdbd,#080808, 13-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|5: 0-1 d,#444444, 2-6 #626262,#080808, 7-12 #bdbdbd,#080808, 13-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|6: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|7: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|8: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|9: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|10: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|11: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|12: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|13: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|14: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|15: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|16: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|17: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|18: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|19: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|20: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|21: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|22: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|23: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|24: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|25: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|26: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|27: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|28: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|29: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+== snap yanked-path grid=100x30 cursor=42,2
+|Kill Newcol Tutor Debug NextColor Dump
+|  NOR /tmp/pardes-snap/tagpath/cwd/c.txt Save Del   NOR /tmp/pardes-snap/tagpath/cwd Del
+|     1 l /tmp/pardes-snap/tagpath/cwd/c.txtine 1
+|     2 line 2                                       c.txt
+|     3 line 3
+|     4 line 4
+|     5
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+== snap drag-cross grid=100x30 cursor=45,1
+|Kill Newcol Tutor Debug NextColor Dump
+|  INS /tmp/pardes-snap/tagpath/cwd/c.txt Save Del   NOR /tmp/pardes-snap/tagpath/cwd Del
+|     1 l /tmp/pardes-snap/tagpath/cwd/c.txtine 1
+|     2 line 2                                       c.txt
+|     3 line 3
+|     4 line 4
+|     5
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+== style drag-cross
+|0: 0-37 #949494,#121212, 38-99 d,#121212,
+|1: 0-1 d,#626262, 2-10 #949494,#121212, 11-45 #d8c8a8,#4a3a1e, 46-48 #949494,#121212, 49-49 d,#121212, 50-51 d,#262626, 52-87 #949494,#121212, 88-99 d,#121212,
+|2: 0-1 d,#444444, 2-6 #626262,#080808, 7-47 #bdbdbd,#080808, 48-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|3: 0-1 d,#444444, 2-6 #626262,#080808, 7-12 #bdbdbd,#080808, 13-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|4: 0-1 d,#444444, 2-6 #626262,#080808, 7-12 #bdbdbd,#080808, 13-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|5: 0-1 d,#444444, 2-6 #626262,#080808, 7-12 #bdbdbd,#080808, 13-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|6: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|7: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|8: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|9: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|10: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|11: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|12: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|13: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|14: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|15: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|16: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|17: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|18: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|19: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|20: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|21: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|22: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|23: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|24: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|25: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|26: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|27: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|28: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+|29: 0-1 d,#444444, 2-6 #626262,#080808, 7-49 d,#080808, 50-51 d,#444444, 52-99 #bdbdbd,#080808,
+== snap path-inert grid=100x30 cursor=11,1
+|Kill Newcol Tutor Debug NextColor Dump
+|  INS /tmp/pardes-snap/tagpath/cwd/c.txt Save Del   NOR /tmp/pardes-snap/tagpath/cwd Del
+|     1 l /tmp/pardes-snap/tagpath/cwd/c.txtine 1
+|     2 line 2                                       c.txt
+|     3 line 3
+|     4 line 4
+|     5
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diff --git a/test/snapshots/tagpath.snap b/test/snapshots/tagpath.snap
new file mode 100644
index 00000000..61181dd5
--- /dev/null
+++ b/test/snapshots/tagpath.snap
@@ -0,0 +1,69 @@
+# THE PATH IN A TAG IS SELECTABLE, NOT EDITABLE.
+# tag_col/tag_anchor index the WHOLE rendered tag (prefix ++ tail) — one
+# coordinate space, no conversions: the renderer prints the cursor at tag_col
+# verbatim and a mouse column IS a tag column. So motions and sweeps reach the
+# mode indicator and the path, a selection over them yanks and executes like
+# any other text, and the ONLY thing fenced off is EDITING: every edit op
+# measures from the first editable column (tagPrefix().len) and does nothing to
+# the left of it.
+lines c.txt 4
+start 30 100 c.txt
+wait 8000 Kill Newcol
+wait 8000 c.txt
+stable 700 20000
+snap start
+# --- keyboard: select part of the PATH ---
+# `:` parks at the tail's start (the first EDITABLE column) — unchanged, that
+# is what makes `:w<Tab>` the same two keystrokes every time
+key :
+stable 400 5000
+snap colon
+# 0 goes to column 0 of the RENDERED tag: the "N" of NOR, a column the keyboard
+# could not name at all before
+key 0
+stable 400 5000
+snap col0
+# W: the long word it traverses, landing the cursor on the space after "NOR"
+key W
+stable 400 5000
+snap sel-nor
+# E: extend to the end of the next long word — the style capture shows ONE
+# highlighted run from that space through the last char of the path
+key E
+stable 400 5000
+snap sel-path
+snapstyle sel-path
+# y yanks the selection. Esc hands the body back; p pastes the register into
+# the file, which is the only way a snapshot can see what was yanked.
+key y
+key esc
+settle 700
+stable 400 5000
+key p
+stable 400 5000
+snap yanked-path
+# --- mouse: a sweep across the prefix/tail boundary ---
+# a left press on a tagline anchors a TAG sweep (not the body's block
+# selection), so the drag paints one run of the tag row. Press at col 12
+# (inside the path), release at col 46 (just past "Save" in the tail): the
+# highlight crosses the boundary — screen col 40, where the tail starts — in
+# one piece, which is the whole point of there being one coordinate space.
+press left 12 2
+drag left 30 2
+drag left 46 2
+release left 46 2
+stable 400 5000
+snap drag-cross
+snapstyle drag-cross
+# --- the path is inert to editing ---
+# a plain click INSIDE the path leaves the cursor there (no clamp into the
+# tail), in insert mode like any tag click — and then typing and backspace do
+# NOTHING: the tag row below is byte-identical to the one in `yanked-path`.
+press left 12 2
+release left 12 2
+stable 400 5000
+text ZZNOPE
+key bs
+key bs
+stable 400 5000
+snap path-inert