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index 94d36d9..7e7c040 100644
--- a/docs/superpowers/plans/2026-08-03-post-0.1.0-usability.md
+++ b/docs/superpowers/plans/2026-08-03-post-0.1.0-usability.md
@@ -243,10 +243,14 @@ taking that too literally.
| 167 | No way to tell one build of an unreleased version from another | enhancement | XS | **done 2026-08-25**, unreleased. The user chose a counter over a git description: `QTMAILDIR_BUILD_NUMBER`, a cmake option ON by default, increments a counter in the BUILD directory on every build and writes `buildnumber.h`. `QTMAILDIR_VERSION_DISPLAY` carries it; `QTMAILDIR_VERSION` stays clean and is what the window title, `applicationVersion` and the release procedure use |
| 168 | Delete is offered on mail already in the trash, and does nothing | defect | S | **done 2026-08-25**, unreleased. Delete is hidden when every selected row is already in its account's trash, Restore when none is, both keyed on the PATH rather than the `deleted` tag. Delete also drops `unread` now, in the same TagChange so one undo returns the folder and the tag together |
| 169 | A card shows the account only as a bar, with no fade and no avatar | presentation | M | **done** 2026-08-26, unreleased, on `card-avatars`, merged fast-forward. Both halves: a `QLinearGradient` from the account colour to the pane's base across the card, and a squircle avatar with initials, given a rect in `CardLayout` so the geometry is asserted without a painter. **Hand-testing found four defects**, all fixed in 9ae43f9: `Avatar::initialsFor()` normalises the display name first (drops the angle-addr, takes the first comma-separated author, unwraps quotes, treats a bare address as no name, requires a word to carry a letter or digit); the two-tone gradient axis spans the DIAMETER rather than a radius, which was letting one hue fill the whole face; the account fade runs right to left, anchored opaque at the card's right edge; and a flat view hashes `ThreadSummary::firstMessageRecipient` rather than the user's own address. The vCard half stays blocked on item 72 |
-| 170 | A row that stops matching the view only leaves it on the Delete path | defect | S | open, 2026-08-26, from the notes, **cause found the same day and the premise is NOT stale**. The optimistic REPAINT is universal; the optimistic MEMBERSHIP is not. `removeThreadsWithoutTag()` has exactly one caller, on the move path, so marking a message read in the Unread view repaints the row and leaves it in a list it no longer belongs to |
+| 170 | A row that stops matching the view only leaves it on the Delete path | defect | S | **done 2026-08-28**, unreleased. `MainWindow::syncViewMembership()` is the guard, moved off the move path and called from all three funnels (message, thread, move). It does the INVERSE too: a write that adds the view's tag back refreshes, since the model cannot insert a row for a thread the query never returned, and without it an undone mark-read stayed invisible in the view it was undone in. Found a second defect while testing: `ThreadListModel::applyTagChange()` never updated the ROOT message's own tags, which a thread row's card draws in preference to the summary since item 110, so an archived thread both kept drawing `inbox` and was judged to still match |
| 171 | A forwarded HTML message reaches the recipient as plain text | defect | M | **done** 2026-08-27, unreleased. Design in `specs/2026-08-27-forward-html-design.md`. The forward sends ONE part chosen by the Send-as-HTML toggle, with the original shown in a read-only pane beside the editor, and remote content stripped by default with a per-forward opt-out. Hand-tested 2026-08-28. Four parts: `HtmlSanitiser` (an ALLOW-LIST, unlike `namespaceCids()`, because a missed strip is a beacon where a missed rewrite is a broken image), a text fallback for the ~9% of mail with no plain part, the MIME nesting, and the composer control |
| 172 | A draft this application writes is tagged `unread` | defect | XS | **done** 2026-08-27, unreleased. `DraftStore::write()` was called with `"D"`, and `maildir.synchronize_flags` makes notmuch tag anything without `S` as `unread`. Self-healing on the next sync of that folder, which is what made it look intermittent |
| 173 | The composer is a plain-text editor, not WYSIWYG | v2 | L | open, 2026-08-27, **asked for by the user** while hand-testing 171. This is a GUI mail client and should edit rich text the way one does: the forwarded original, and the user's own formatting, visible and editable in place. Supersedes the preview 171 shipped as a middle ground, and **subsumes item 133** (markdown syntax highlighting), which is the same want answered cheaply. See the entry: the draft format and the markdown-as-source-of-truth model both change |
+| 176 | Undoing a thread-scoped action applies its inverse to messages it never changed | defect | S | open, 2026-08-28, found by hand while testing 170, **data-affecting and live**. `ThreadTagCommand::undo()` inverts the tags and keeps the THREAD as scope, so undoing `Mark thread read` adds `unread` to every message in the conversation rather than to the ones the write removed it from. Measured on the user's own mail: a 44-message thread had 2 unread, was marked read, and the undo left 43 unread. `maildir.synchronize_flags` is on, so it rewrote the files and would have reached the server. Repaired by hand the same day. `MessageTagCommand` has the same shape on a multi-message scope |
+| 177 | A thread row means both a message and a conversation, and neither consistently | design | L | open, 2026-08-28, **specified**: `specs/2026-08-28-thread-row-identity-design.md`, read that rather than this row. A thread row becomes the CONVERSATION: it carries no first message, shows a dashboard rather than a message, and every action on it is thread-scoped. A summary with `totalCount == 1` stays a message row and does not change. Reverses items 108, 110 and 111 deliberately, deletes the `*_thread` submenu and its five action names (an `### Upgrading` note), and makes membership the union with no exceptions. **Item 170 is blocked on this** and item 176 gets easier under it |
+| 174 | An external `notmuch new` reaches the index without the pending count noticing | defect | S | open, 2026-08-28, from the notes. Item 54 cleared the count for a sync run by `mailsync.sh`, which is what `SyncMonitor` watches; a bare `notmuch new` (a hand run, or a cron entry that is not the script) takes notmuch's own write lock and touches `/tmp/mbsync.lock` not at all, so nothing observes it. The user's framing is the approach: we own `mailsync.sh` and the whole process |
+| 175 | The send countdown says Undo, and cannot be skipped | presentation | XS | open, 2026-08-28, from the notes. Two changes in one control: the button reads Abort, and a second button sends immediately rather than waiting the countdown out |
Sizes are rough: XS under an hour, S a sitting, M a session.
@@ -1262,3 +1266,104 @@ rich-text composer with the original inside it, editable.
`QSyntaxHighlighter` over the plain editor, which is the cheap answer to the
same want ("show me what I am writing"). If this is built, 133 is moot; if
this is deferred, 133 is the thing to do instead. Do not build both.
+
+## 174. An external `notmuch new` reaches the index without the pending count noticing
+
+**Observed (user, from the notes):** "the statusbar still reads that an
+external notmuch run can clear the pending edits without the bar noticing.
+Since we own mailsync and the whole process, we should fix that."
+
+**Cause (verified in the code, 2026-08-28).** Item 54 built exactly one
+external path and it is narrower than the note assumes. `SyncMonitor` watches
+the inode of `/tmp/mbsync.lock` in `/proc/locks`
+(`syncmonitor.cpp:64`), which is the file `assets/mailsync.sh` flocks, and
+`onExternalSyncStateChanged()` clears `m_pendingTagEdits` only when
+`MailSync::lastRunOutcome()` reads an OK from that script's log
+(`mainwindow.cpp:4812-4840`).
+
+A `notmuch new` that is not that script takes notmuch's own write lock inside
+the Xapian directory and never touches `/tmp/mbsync.lock`. Nothing observes
+it: no state change, no log line to read an outcome from, so the count keeps
+reporting work that has already shipped and the exit prompt offers to sync for
+it. This is item 54's symptom surviving through the one route item 54 did not
+cover.
+
+**Approach (not decided).** The note names the lever: the process is ours, so
+the honest fix is to stop inferring a sync from a lock file and observe the
+INDEX instead. `notmuch_database_get_revision()` gives a monotonic uuid plus
+revision that moves whenever anything is committed, whoever committed it; the
+worker already holds a handle and reopens it. Watching that would cover the
+script, a hand run and a cron entry alike, and would make the outcome question
+moot: a revision that moved is evidence the write landed, where a log line is
+a report about it.
+
+**Constraints.**
+- Clearing the count on an observed revision bump is NOT sound on its own. A
+ revision moves for mail arriving as well as for our edits landing, so the
+ bump has to be read as "the index changed, re-check" rather than "our edits
+ are in". What settles it is the per-message check the pending map can
+ already do: every entry names a message and a tag.
+- `SyncMonitor` stays whatever this becomes. It answers a different question,
+ "is a sync running", which drives the spinner and the write hold, and a
+ revision counter cannot answer it.
+- Item 125 is open on the same monitor and should be read alongside: a
+ `mailsync.sh` that exits 75 leaves the spinner running for ever.
+
+## 175. The send countdown says Undo, and cannot be skipped
+
+**Observed (user, from the notes):** "the countdown popup has a 'undo' button
+that would read better as 'Abort'", and "we could add a 'Send' that skips the
+countdown and sends right away."
+
+**Cause.** Not a defect, a wording and a missing control. `SendDialog` runs
+the undo window from item 123's design; the button is labelled for the undo
+stack's vocabulary rather than for what it does here, which is to stop
+something that has not happened yet.
+
+**Approach.** Rename the button, add a second one that fires the send
+immediately. Both live in `SendDialog`; the timer already ends in the same
+call the button would make, so skipping is stopping the timer and calling it.
+
+**Constraints.**
+- The countdown IS the undo for a send, per CLAUDE.md's no-confirmation rule.
+ A skip button must not become a default, or the protection is gone for
+ everyone who learns to press it.
+- Which button is the default on Return matters here and is the user's call.
+
+## 176. Undoing a thread-scoped action applies its inverse to messages it never changed
+
+**Observed (user, 2026-08-28):** found while hand-testing item 170. A
+thread-scoped `Mark thread read`, then Ctrl+Z, left almost the whole
+conversation unread rather than restoring the two messages that had been.
+
+**Cause (measured, not read).** `ThreadTagCommand::undo()`
+(`src/mainwindow.h`) sends `sendThreadTagChange(m_threadIds, m_remove, m_add,
+...)`: the tags are inverted and the SCOPE is not. `applyTags()` is a blind
+add/remove over whatever ids the thread resolves to, so the inverse of
+"remove `unread` from 44 messages" is "add `unread` to 44 messages",
+regardless of which of them carried it.
+
+Measured on the live index: thread of 44 messages, 2 unread. Mark thread read
+resolved 44 and removed the tag; the undo resolved 44 and added it, leaving
+43 unread. The 42 that were read before the user touched anything were
+rewritten. `maildir.synchronize_flags` is on, so the Maildir filenames were
+rewritten too and the next sync would have carried it to the server.
+
+**Approach (not decided).** The command has to record what the write actually
+CHANGED, not what it asked for. `applyTags()` is the only place that knows:
+it holds each message open and can report the ids whose tags actually moved.
+That is a worker change (`tagsApplied` carrying the effective set) plus a
+command that stores it.
+
+**Constraints.**
+- The undo stack is this application's substitute for confirmation dialogs
+ (CLAUDE.md), so an undo that damages state is worse than the dialog it
+ replaces.
+- `MessageTagCommand` has the same shape. It is harmless on a single message,
+ where asked and changed agree, and has the same defect on a multi-row
+ selection.
+- The five `*_thread` actions are the ones that resolve to a large id set, so
+ they carry almost all of the exposure.
+- A test needs a thread whose messages DISAGREE about the tag. Two messages in
+ the same state answer identically whichever way the code resolves them,
+ which is the trap CLAUDE.md already records for item 87.