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534b36e655
The .repos bare-clone cache was excluded from disk-usage and never reclaimed, so it grew monotonically and was invisible while doing it. On the machine in #6265 it was 3.78 GB — 29% of the workspaces root, and exactly the difference between what disk-usage reported (9.1 GiB) and what the user's file manager showed (12.88 GiB). Accounting: .repos is now measured and reported on its own line rather than skipped. It stays out of the task totals on purpose — every task in a workspace checks out from this one shared cache, so folding it into per-task numbers would attribute it to directories that do not contain it. Other daemon-internal dot-directories (.skill-cache) are no longer counted as workspaces, which is what produced bogus rows like '.skillca'. Eviction: a bare repo is removed only when all four hold — GCRepoTTL > 0, no watched workspace still claims it, no worktrees remain, and no task has created a worktree from it within the TTL (default 30d). Two decisions worth calling out: - The workspace check is a RETAIN predicate, not a delete predicate. Sync re-clones every listed repo that is missing whenever a workspace registers, which happens on every daemon start, so evicting a repo the workspace still claims just buys a full re-clone on the next restart — that moves disk cost, it does not reclaim it. Because the set only prevents deletion, a stale or empty one cannot widen what we delete. - Idleness is an explicit stamp written by CreateWorktree, not directory mtime. Restarts re-fetch every cached repo, refreshing the mtime of repos no task has checked out in months; atime is unavailable in practice (noatime on Linux, off by default on Windows). A cache with no stamp reports unknown and gets its clock started, never treated as ancient — otherwise the first cycle after an upgrade would wipe every cache on the machine. Evicting wrongly costs a re-clone, not a failure: the next task that needs the repo takes the cache-miss path in ensureRepoReady. Verified on a live runtime: both table views now show the .repos line (242.8 MiB across 3 repos) and no longer list .skill-cache as a workspace. Co-authored-by: multica-agent <github@multica.ai>