Changes touching this path

• loot seek reads what a question keeps and nothing else: the loot backend read every change through readable_tree_at, which decrypts the whole tree and only then narrows to the pathspec, so a scoped search cost the repo and a listing decrypted every file to print its name. a search now opens each kept path once through readable_object_at, keyed on the content address so an object carried across the changes of a revset is read once, the rule grep has followed since #1500, and a listing decrypts nothing: a local target asks the visibility gate per kept path through a new per-object form of the same predicate, Readable::visible_object and Workspace::may_open, together with the store index and the burn log, which names the set surface prints; a remote target keeps the tier gate. the counted read pins it in tests/seek_object_reads.rs with its control: a whole-tree search opens one object per path, a listing reads one sealed header per kept path and none outside the pathspec, a scoped search opens the subtree and not the tree, and a revset over two changes opens a carried object once, seven where the old walk opened twelve. a listing still reads each kept header once because the key gate reads the sealed header to ask the keyring, which the counter counts as a get; it decrypts nothing, and that is stated where the pin is rather than claimed as zero. measured on this repo: a scoped search over crates/loot-cli 189 ms before and 123 ms after, a bare listing 167 ms before and 124 ms after, a whole-tree search 241 ms before and 223 ms after, best of three each; this repo holds small objects, so the win here is the fixed per-invocation cost and the pins are what carry the claim at scale. the two-axis review before landing made the engine gate one function the tree walk and the per-object view both call rather than two copies under a parity sentence, reduced the listing to the oracle alone since can_open is already false for an unheld or burned object, named the scan cache Scanned with unreadable, silent and hits, said the count is not surface count because surface labels a burn and this verb counts it sealed as before, pinned a burned path leaving the listing and never being opened, and recorded that the ticket premise of a returning visible_paths_at was false. red under mutation: the address cache dropped (0 passed, 1 failed), a search reading the whole tree (0 passed, 1 failed), a listing gating the whole tree (0 passed, 1 failed), a listing skipping the key gate (0 passed, 1 failed), and the engine gate no longer asking the keyring (0 passed, 1 failed). 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 (3981 passed over 124 binaries, 7 ignored) (#2102) d7606a23 · dbf3dbe6…
• test scratch directories are named by one shared helper, common::scratch, from the process id and a per-process counter rather than the clock, so two tests asking for one tag at once are no longer handed one directory that the second caller empties and refills (the #2258 mechanism): 19 test files under crates/*/tests named a temp_dir path from SystemTime nanoseconds in 21 statements and now call fresh_dir or fresh_path, loot-cli files reaching it through mod common and loot-first exit_codes compiling the same std-only file by path, and revset_everywhere and plaintext_equality_census, which already counted, call it too. scratch_dirs.rs holds the #2258 pin, moved from revset_everywhere and aimed at the shared helper, red under the clock naming in 13 runs of 13 (0 passed and 1 failed, 1 to 16 of 400 directories handed twice), and a guard that walks every .rs file under crates/*/tests and refuses a temp_dir statement that reads the clock, red over the unconverted tree naming the 19 files (1 passed and 1 failed), red with buoy_exit put back (1 and 1) and red when the walk finds nothing (0 and 1), each restored green. no other test changes what it asserts. the workspace suite is green (4533 passed over 140 binaries, 13 ignored, from 4532 over 139: the guard is new and the pin moved into its own binary). test-only, so it owes no deploy (#2358) 6dd1e05b · 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.