swapped's first field is the LOG's spelling, not the register row's — Amendment 15's canonical-name claim is made where the register is not read #55

Found by Copilot round 2 on #47 (lanes-edit.sh:4917), against code that landed on main with Amendment 15 (#41, 8345d2f) and therefore predates that pull request's diff — filed rather than folded into it.

The claim and the code

swapped_candidates folds each lane to one case for the "which line is this lane's LAST" decision (Amendment 15) and keeps the original spelling beside it:

{ k = tolower($2); p = pos($10, $11)
  if (!(k in mp) || p >= mp[k]) {
    mp[k] = p; … nm[k] = $2 } }

$2 is the log line's own lane field. The printf then emits nm[l] as the row's first field and inside the pickaxe key, under a comment that says:

nm[l] AND NEVER l (Amendment 15, 8345d2f): the key is the lane folded to one case and nm is the spelling the register row carries, which is the one a caller of this output hands back to a read.

It is not the register row's spelling. It is the spelling of the last PAUSED … swap; line in that lane's own object log, and the two differ exactly when Amendment 15 exists to help: the suite's own repoWin-1 shape has a repoWin-1 ROW and a repowin-1 EVENT, so swapped Eagle hands callers repowin-1.

Why it matters

swapped is the swap-record rung that lane-handoff, restart and the launcher fall to when nothing else binds the window, and its first field is taken as the lane name. Each of those now canonicalises its <lane> through canon_lane before it reads or writes, so the consequence today is one extra resolution rather than a wrong write — but the output's own contract says the field is canonical, and a reader that believes it is not wrong to.

The act

Either resolve each folded key through the register before rendering it (the resolver is canon_lane, and swapped_candidates already reads the register's own text for the workstation filter), or change the field's contract in both the comment and docs/README-lanes.md to say it is the LOG's spelling, and make each caller's canonicalisation the documented step.

A case in tests/test_lane_helpers.sh: a lane whose row is repoWin-1 and whose PAUSED event is spelled repowin-1, asserting what swapped prints in its first field.

Lane: openRepoTools-3.