A lane folds to a fixed slim vertical strip carrying its glyph, its card-count
badge and its title turned on its side, and the strip is deliberately not part
of the window's division: the expanded lanes' units divide what is left once
each folded strip's fixed width has come off the top, so folding a lane is a
re-divide trigger of the Show/Hide Trash family — the window never moves and
the siblings grow into what the lane gave up.
The state is a first-class lane frontmatter key, `collapsed: true`, and
document state exactly as `width` is: the files are the board, so an agent
folds a lane by writing one key. Absent means expanded, expanding removes the
key rather than writing `false` (the remove-at-default family beside a
one-unit `width`, the empty rename's `title` and the None well's
`background`), and the lane's `width` rides along untouched so expanding
restores the lane the user had. The read is `width`'s leniency one type over —
a boolean scalar or a quoted boolean word reads as itself, everything else has
no reading at all and renders as expanded, bytes preserved either way.
Toggling is the header's always-visible collapse chevron, the lane context
menu's single Collapse Lane / Expand Lane row, and a plain click anywhere on
the strip; a modified click on the strip stays the ordinary selection grammar,
so a folded lane is still selectable by pointer. The title reads bottom-up and
is justified to the top of the room below the strip's chrome (owner ruling
2026-08-08), truncating against the strip's own height.
While folded the lane draws no cards at all, which is what makes every
exclusion true by construction rather than by a guard per gesture: no card
face means no marquee target and no navigation frame, and no registered grid
means the masonry's drop zones have nothing to resolve against. What did need
code is the half that names absolute destinations — the option-arrow jumps and
the arrow seed scan past a folded lane, the lane domain's down-arrow is inert
on one, and New Card skips it (a selection inside one falls through to the
last-active lane, the stale selection's rule). A drop on the strip appends at
the lane's end, cards and Finder files alike, with an accent edge standing in
for the shadow the strip has no masonry to open; there is no hover-to-auto-
expand yet. Lane reorder works on the strip, and a dragged folded lane carries
its fold, so its shadow and its replica are the strip rather than its units.
The write is `writeLaneWidths` clause for clause — one `updateIndex` bracket,
the same stamp behaviour, the same three do-nothing paths — with two new
`WriteOperation` cases and two new undo verbs rather than one of each, because
a banner or an Edit-menu row that said "resize" after Collapse Lane would name
a control the user never touched.
Claude-Session: https://claude.ai/code/session_014PtZdPwqZuqEDLc6wZMtEy
Step 7 of strategy/01-git-excision.md, the companions. The agent guide bumps to v11: the Git section teaches repo-resident etiquette alone (stage only your own paths, commit your own changes, leave app-maintained files to the app) — existing boards heal to the new text on next open. README re-anchors: the four git feature bullets out, tiers say the complete Mac experience is free, and one bullet states the format's git-friendliness promise. The changelog drops the never-shipped git entries. DESIGN re-rules: 06 retired with Undo routing migrated to 13 (now the sole substrate's doc, seam kept open), 07 retired as written pending the ops-service workstream, 14 retired as superseded record, 12 carries the second pivot note, the index reflects all of it; the charter gets a pointer note (the anchors' full re-ruling stays with the user). InertGitTests renames to GitAgnosticStorageTests — the excision restores its original claim app-wide. And the sweep: ~70 comment sites across 36 files adjudicated against the keeper list, every present-tense description of the excised machinery made past tense or repointed, keepers untouched. 2,707 tests green.
Claude-Session: https://claude.ai/code/session_014PtZdPwqZuqEDLc6wZMtEy
Step 5 of strategy/01-git-excision.md: the seventeen dead engine files and the five remaining git test suites go (InertGitTests stays — the naming footgun is a Storage keeper). Two rescues ride ahead of the delete: HarvestedReceipt relocates to EchoLedger (the harvest surface outlives its git consumer; foundation for the deferred journal), and commentTimestamps joins the narrator it always served. The provider-swap purge test re-expresses over a git-free fake; the duplicate-id ladder keeps every pure historyRank pin and loses only the two ranker-driven ones. Resurrection point: tag pre-git-excision. 2,707 tests green.
Claude-Session: https://claude.ai/code/session_014PtZdPwqZuqEDLc6wZMtEy
Step 2 of strategy/01-git-excision.md: CommitMessageEngine and the composer seam relocate to a neutral module renamed away from commit vocabulary (ChangeNarrator, ChangeNarrationRequest, ChangeNarrating, SemanticChangeNarration, ChangeAuthorship), GitChangedPath extracts from GitCommitOperation as ChangedPath, and the one git tie severs — authorship's foreign case carries a display name, not a GitIdentity. The spec tests transplant as ChangeNarratorTests, alive until the journal work begins. 3,009 tests green.
Claude-Session: https://claude.ai/code/session_014PtZdPwqZuqEDLc6wZMtEy
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