Lataa worktrunk v0.42.0

Release Notes
Improved
- Alias banner is silent when there's nothing to summarize: ◎ Running alias <name> now only prints when the alias has at least one named step worth naming. Single unnamed aliases (ls = "wt list") and all-anonymous pipelines return no announcement — the banner was just echoing the user's typed name. Pipelines with named steps keep their informative summary (◎ Running alias deploy: install; build, lint). -v still prints the bare form as a confirmation line. (#2339, thanks @markjaquith for reporting #2322)
- Alias dispatch ~30% faster via batched git config reads: RepoCache now reads every config key with a single git config --list -z instead of one git config subprocess per key. Config-backed accessors (is_bare, primary_remote, remote_url, default_branch fast path, switch_previous, has_shown_hint, core.fsmonitor, core.pager, and more) resolve via an O(1) map lookup. Writes route through set_config_value / unset_config helpers that update the on-disk config and the in-memory map together. Benchmarked on benches/alias: warm/1 77.4 → 56.9 ms (−29%), cold/100 80.5 → 54.5 ms (−30%) — ~25 ms saved per wt <alias> invocation. (#2344, #2346, thanks @markjaquith for reporting #2322)
- Further O(1) single-branch upstream lookups on wt merge / wt switch: Follow-up to #2337. effective_integration_target and the wt switch tracking-info report switched from bulk Branch::upstream() (a for-each-ref over every local branch) to upstream_single() — wt list still uses the bulk cache, but one-shot callers no longer pay for it. (#2338)
- Stale cached default branch surfaces a clear error with a reset hint: default_branch()'s fast path no longer re-validates the cached worktrunk.default-branch on every call; when the cached value is stale, require_target_branch / require_target_ref raise a new StaleDefaultBranch error that names the cache key and suggests clearing it. wt list --branches opportunistically warns when the cached default isn't among the enumerated branches — no extra git fork. (The old silent fallback + two preflight warning sites are removed.) (#2344)
Documentation
- worktrunk skill: non-interactive hook approval guidance: skills/worktrunk/SKILL.md now covers the hook-approval prompt error that agents hit running wt merge (or any command that runs project hooks) in a non-interactive session. Explains wt config approvals add (interactive, persists to ~/.config/worktrunk/approvals.toml) vs --yes (single-invocation bypass for CI/CD), and directs agents to escalate rather than auto---yes, since pre-approval is a trust decision. (#2343)
Internal
- Flaky test_switch_picker_preview_panel_main_diff on macOS: Under heavy parallel load, skim's N/M match counter updated ahead of the list-panel repaint, so wait_for_stable could declare a screen stable with stale rows still visible (~1-in-120 failure rate). The stability check now rejects states where skim's parsed match count doesn't equal the visible list-row count. Closes #2334. (#2345)
- benches/alias regression guard for parent-side dispatch overhead: Five-variant harness (wt --version startup floor; noop alias at 1/100 worktrees × warm/cold caches) protects the #2337/#2338 O(1) upstream work and the #2344 bulk config read. (#2340)
- Remove/TTFO benches invalidate wt caches between iterations: benches/remove.rs::first_output and benches/time_to_first_output.rs::remove were reporting warm-cache cost because iter 1 populated .git/wt/cache/ and iter 2+ hit it. Now use iter_batched + invalidate_caches_auto (which also clears worktrunk.default-branch). benches/CLAUDE.md documents the rule and the full list of what invalidate_caches_auto clears vs. preserves. (#2341)
Install worktrunk 0.42.0
Install prebuilt binaries via shell script
curl --proto '=https' --tlsv1.2 -LsSf https://github.com/max-sixty/worktrunk/releases/download/v0.42.0/worktrunk-installer.sh | sh && wt config shell install
Install prebuilt binaries via powershell script
powershell -ExecutionPolicy Bypass -c "irm https://github.com/max-sixty/worktrunk/releases/download/v0.42.0/worktrunk-installer.ps1 | iex"; git-wt config shell install
Install prebuilt binaries via Homebrew
brew install worktrunk && wt config shell install
Download worktrunk 0.42.0
────────────────────────────────────────────────┬───────────────────┬─────────────
File │Platform │Checksum
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worktrunk-aarch64-apple-darwin.tar.xz │Apple Silicon macOS│checksum
────────────────────────────────────────────────┼───────────────────┼─────────────
worktrunk-x86_64-apple-darwin.tar.xz │Intel macOS │checksum
────────────────────────────────────────────────┼───────────────────┼─────────────
worktrunk-x86_64-pc-windows-msvc.zip │x64 Windows │checksum
────────────────────────────────────────────────┼───────────────────┼─────────────
worktrunk-aarch64-unknown-linux-musl.tar.xz │ARM64 MUSL Linux │checksum
────────────────────────────────────────────────┼───────────────────┼─────────────
worktrunk-x86_64-unknown-linux-musl.tar.xz │x64 MUSL Linux │checksum
────────────────────────────────────────────────┴───────────────────┴─────────────
Install via Cargo
cargo install worktrunk && wt config shell install
Install via Winget (Windows)
winget install max-sixty.worktrunk && git-wt config shell install
Install via AUR (Arch Linux)
paru worktrunk-bin && wt config shell install