Changes touching this path

• loot log grows --graph, and the half this ticket is named for turns out to have landed already: #1494 built the per-head sectioned listing, so the 255 refusal on a diverged repo was gone before this started and three of the six criteria were already met - and --all is dropped rather than built, because loot's default listing is already the union of every head while git needs that flag only to widen from HEAD's ancestry, so porting the spelling would have shipped a flag that changes nothing. What is left is the drawing, and it goes in behind a seam rather than inside the formatter: topology.rs resolves each row's recorded parents into indices within the listing and flattens the fork's three sections into one children-first sequence, holding the two derived facts a JSON parents array and an ASCII gutter would otherwise compute separately and disagree about silently, so #1540 can emit machine topology off Topology.nodes without touching lay_out or draw. HistoryRow gains parents from graph_view, ids only, so no manifest materializes and the 507 ms d6be741 removed stays removed - and no DAG walk was needed at all, because the per-head and shared split is already a valid children-first order, which makes the whole feature one map lookup per recorded parent rather than a second traversal. The empty head is named above the drawing rather than drawn, since a head recording no changes of its own is the one fact a picture cannot show by drawing it and a two-head repo would otherwise look unforked, and the shared-history heading goes away under --graph because the join is visible as a merge line instead of a third section to correlate by eye. The fork pin is extended rather than replaced, --all is pinned as refused with its reason in both the unit gate and the smoke test, four independent breakages were each proved red before the tests were trusted, and a join drawn as a fork opening - which abandoned the leftmost column and indented a thousand rows under a lane that had already ended - was a layout defect only the real two-head repo showed (#1497) e963a2a9 · dbf3dbe6…
• loot log gets a machine shape, and the seam it needed turns out to have existed all along: every verb already renders through Emit, so nothing had to be plumbed - what was missing is that the prose-only verbs return Message, which collapses their structure into a String at the cmd_ site, before the format is known. So adding machine output is not teaching the renderer a second format, it is stopping a verb destroying its own data on the way out, which is why it cannot be done to forty-seven verbs mechanically and why this ticket does one. Log, LogChange and LogWorking hold the structure and render all three formats from it, consuming topology.rs by making the same two calls --graph makes and reading row, edges, elided and merge straight off the nodes - no second walk, no ancestry query, and the module never sees a Workspace, so the manifests d6be741 stopped materializing stay unmaterialized. The load-bearing subtlety is that edges are indices into the shipped array, so --reverse has to happen before Topology::of rather than after, and the pin reads edges back as version-byte pairs so a wrong index cannot pass as a right one. The empty head is why head rows exist at all: b0cffc66 records no changes of its own, so it has an H row and no change row anywhere, and without the head rows a two-head repo would reach a machine reader looking unforked. What stops the other verbs being forgotten is a census that names rather than counts, two set-equal lists over derived vectors plus a sum, reusing the existing machine_output_verbs so it cannot disagree with the USAGE census - and the debt list may only shrink. Two ADRs are amended rather than edited past: 0023 quotes its own sentence that nothing needs machine output from log or manifest and says log graduates while manifest does not, and narrows its porcelain-first framing as written for a homogeneous per-path verdict rather than a shape with nested arrays; 0066's three counts had to move in place because a test asserts them against the roster. And both numbers in this ticket's scoping were wrong the same way source_walk was wrong in 9559f0a, a grep for one spelling of a thing with two: the table holds 66 verbs and not 54 because twelve rows are verb_of, sixteen took a machine selector and not seven, and ADR 0066 had recorded the right figures three weeks earlier. Criterion four had nothing to satisfy, because the SDK never calls loot log at all (#1540) 915db92c · dbf3dbe6…diff
• sweep 1 fix-up over #1826, #1837 and #1839: a live change only a superseded head reaches is listed in the fork view, in a third section of its own, rather than in no section at all. LogGraph::retain_heads leaves such a change with an empty reachable_from, and history() partitioned the fork on exactly one head and more than one, so after a move --onto the ancestor the old tip alone reaches was printed nowhere - reproduced first through the spawned binary with two live lines (0 passed, 1 failed), the fork and the non-empty superseded head both holding as controls. GraphHistory gains unreached, the renderer prints it under behind a superseded tip after the shared ancestry, drawn_rows leads with it because such a change can only be a child of a lane or shared row, the path filter, retain_versions and all_rows walk it, and both machine shapes carry the row with no new column. HEAD on an untracked position with no working change now counts the heads Liveness::is_superseded rejects and answers the sole counted head by name, because Position::anchor answers the first graph head, which can be the superseded one; measured at the other two sites the ticket named, propose already reads is_live and IntegrationPreview deliberately counts the whole partition with retire for the superseded ones, so the liveness doc now points at the callers of the predicate rather than listing two readers. the move --onto usage line gets its space back; refit_shape spells its path columns through treepath::store_key with a backslash pin, and the #2033 census records the tree-path axis it is blind to by design; the shallow clause has one spelling, workspace::parents_not_held, read by the notice and the push refusal, with the pin the suite lacked; carried is carried_count, Reanchored.change is change_id, the squash and absorb op-log lines say re-anchored, frontier_beyond_the_host is private, the one-flag-member sentences drop one, ADR 0089 names both readers of .loot/shallow and both frontier spellings, and the one raw exit ADR 0089 rests on is held to one by a census in tutorial.rs. own > 0 for the move --onto stale head is pinned off the loot heads row. red first, six mutations in one round over disjoint pins: the unreached filter blinded, drawn_rows reordered, the HEAD filter blinded, store_key undone and a second raw exit added redden five pins with the sync shallow control green (1 passed, 5 failed) and the spawned fork pin (2 passed, 1 failed); the noun-verb swap survived tests/shallow (10 passed, 0 failed), which is why the clause has a pin now (0 passed, 1 failed under the swap). ADR 0066 keeps its gated 28 and points at the gate instead of at tickets. no migration, no wire or format byte moves, and no forge or relay byte moves, so this owes no deploy. the workspace suite is green (3895 passed over 122 binaries, 7 ignored) (#2046) 0b55a20f · dbf3dbe6…diff

Renames are not followed. loot's tree maps a path to an address, so a rename is a delete and an add. This list is the history of the name, not of the bytes.