diff --git a/CLAUDE.md b/CLAUDE.md
index 4688af1..03ce682 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -117,6 +117,15 @@ persistence) → GUI (Qt widgets that read the manager and connect to its signal
   root are never moved; the new path syncs cross-machine via the `location`
   newest-wins merge in `conflict_resolver`). Nothing else may move or rewrite
   music files. The library JSON is the source of truth for everything else.
+- **Versioning & self-update:** `__version__` in `lintunes/__init__.py` is
+  the single source of truth (`setup.py` regex-reads it, never imports the
+  package). Claude bumps minor for feature rounds and patch for fix-only
+  rounds as part of each round's final commit; trav decides major bumps. The
+  status-bar version button (`gui/version_button.py` + `lintunes/updater.py`)
+  checks `origin` shortly after launch and every 4 h, and a click runs
+  `git pull --ff-only` then re-execs the app — pushing `master` is
+  effectively releasing to the other machines (a new pip dependency still
+  needs a manual `pip install -e .` there).
 - `scripts/` holds one-off maintenance tools (`audit_artwork.py`,
   `recover_artwork.py`, `clear_computed_ratings.py`) run manually against a data
   dir; most default to dry-run and need `--write` to mutate files.
diff --git a/TASKS.md b/TASKS.md
index 487b78b..02d00ab 100644
--- a/TASKS.md
+++ b/TASKS.md
@@ -3,7 +3,44 @@
 Legend: `[ ]` todo · `[~]` in progress · `[x]` done.
 When a round closes, move its finished items to `tasks-done.md`.
 
-## Round 18 (current) — the 2026-07-02 backlog batch
+## Round 19 (current) — version display, git self-update, BPM fix
+
+Plan reference: `~/.claude/plans/some-fixes-features-for-lintues-merry-journal.md`.
+Tests land in `tests/test_round19.py`. First versioned release: **0.1.0**.
+
+- [x] Version number bottom-left in the status bar: `__version__` in
+      `lintunes/__init__.py` is the single source of truth (setup.py
+      regex-reads it); shown by the new `gui/version_button.py`; tooltip
+      carries the git short hash so two machines on the same version but
+      different commits are distinguishable.
+- [x] Git self-update: new `lintunes/updater.py` fetches upstream ~10 s
+      after launch and every 4 h (daemon threads, lastfm.py pattern). Commits
+      behind → a `*` on the version button; click → confirm dialog →
+      `git pull --ff-only` → clean quit (flush + player shutdown) →
+      `os.execv` relaunch on the new code (positional file args stripped so
+      they don't re-import). Pull failures (offline / conflicting local
+      edits) surface in the status bar and leave the running app untouched.
+      Not a git checkout / no upstream → button is just a static label.
+      Limitation: a round that adds a pip dependency still needs a manual
+      `pip install -e .` per machine. Pushing `master` is now effectively
+      "releasing" to the other machines.
+- [x] Status-bar bug found while verifying: the totals label was added with
+      `addPermanentWidget(…, stretch=1)`, which squeezed the transient
+      message area to zero width — every `showMessage` (scrobbles, tag-write
+      errors, import status, sync notices) has been invisible since the
+      label landed in Round 5. Both readouts are now non-permanent widgets:
+      a transient message temporarily replaces them, then they return.
+- [x] BPM tap button: whole-session averaging — removed the 8-tap rolling
+      window in `tap_tempo.py` (trav's "no rhythm" suspicion was the window,
+      not him). All taps since the session started are averaged; a >2.5 s
+      gap still begins a new session. Verified live under Xvfb: 8 fast +
+      8 slow taps read the blended overall average, not just the recent 8.
+- [ ] **verify by eye in the running app**: version reads bottom-left;
+      after the next `git push`, machine 2 shows the `*` within ~10 s of
+      launch and click-to-update pulls + restarts; tap out a real song's
+      BPM and sanity-check the number.
+
+## Round 18 — the 2026-07-02 backlog batch
 
 Plan reference: `~/.claude/plans/can-you-knock-out-synthetic-horizon.md`.
 Tests land in `tests/test_round18.py`. (The equalizer backlog item moved to