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iOS: guide-locked composer bar with static-inequality keyboard absorption - #10687
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…qualities
Dogfood on the merged build reported the composer bar less glued to the
keyboard than earlier guide-era builds. iOS keyboards animate with a
private spring that notification-driven followers only approximate; the
system guide is the only pixel-locked follower. The original reason to
abandon the guide — a second animation authority racing per-leg slack
retargets — is removed structurally: the blank-space absorption is now
expressed as STATIC constraint inequalities
wrapper.bottom <= host.bottom (natural cap)
wrapper.bottom <= dock.top + chrome + blank (content cap)
wrapper.bottom == host.bottom (optional pull, 750)
whose constants change only on chrome mutations and content
measurements, never during a keyboard leg. The solver therefore derives
the wrapper's target in the SAME layout solve and animation transaction
that moves the dock, whichever authority seats it.
Seat authority: the guide wherever it is trustworthy (chrome visible,
iOS <= 26); the notification constant from #10518 on iOS 27, while the
chrome is hidden, under the remote ios-keyboard-dock-rebuild-revert kill
switch, and under the DEBUG rebuild forces — which makes the host's kill
switch and defaults parameters meaningful again. The tracker keeps
healing the keyboard model (height and visibility) after detached
transitions on every OS. The default-path UITest expects the layoutGuide
source again.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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ChangesKeyboard dock layout
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: 🟡 Moderate · up to The PR changes keyboard docking by OS version, but the default-path UI test still unconditionally expects layout-guide seating; on iOS 27 this conflicts with the notification-based path and can fail, so merge should wait for an OS-aware assertion or explicit acceptance. Sequence Diagram(s)sequenceDiagram
participant GhosttySurfaceView
participant GhosttySurfaceHostView
participant UIKeyboardLayoutGuide
participant KeyboardNotifications
GhosttySurfaceView->>GhosttySurfaceHostView: Report hostedChromeHidden
GhosttySurfaceHostView->>UIKeyboardLayoutGuide: Seat dock from layout guide when selected
GhosttySurfaceHostView->>KeyboardNotifications: Update notification dock when selected
GhosttySurfaceHostView->>GhosttySurfaceHostView: Apply content cap and natural bottom pull
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✅ Passed checks (24 passed)
Full details: Description checkExplanation The description gives a detailed, relevant summary, explains the rationale, and describes test updates and migration impact. It does not use all template sections, but the core pull request information is complete enough for review. Full details: Cmux Swift Actor IsolationExplanation The production diff does not introduce a Swift 6 actor-isolation mistake. Full details: Cmux Swift Blocking RuntimeExplanation PASS: The production diff adds no semaphore, blocking wait, sleep, delayed dispatch, main-queue sync, timer, polling loop, or manual lock. Full details: Cmux Browser Automation Off-MainExplanation PASS: The custom check is not applicable. The complete visible PR range ( Full details: Cmux Expensive Synchronous LoadExplanation PASS: The PR diff changes only keyboard docking constraints, chrome visibility, and a UI test. The changed production Swift files add no Full details: Cmux Cache Substitution CorrectnessExplanation PASS: The PR changes only transient keyboard docking, layout constraints, a chrome-state accessor, and a UI-test expectation. The diff does not replace an authoritative read in a persistence, history, undo, or snapshot path. Full details: Cmux No Hacky SleepsExplanation PASS. The PR changes only three Full details: Cmux Algorithmic ComplexityExplanation PASS. The production diff adds only constant-time state checks, constraint updates, and scalar arithmetic in Full details: Cmux Swift ConcurrencyExplanation PASS — the pull-request diff does not introduce or materially expand any prohibited Swift concurrency pattern. The changed files are limited to the host view, one Full details: Cmux Swift `@Concurrent`Explanation PASS. The PR diff adds no Full details: Cmux Swift Package BoundariesExplanation PASS. The production changes are in the existing SwiftPM target Full details: Cmux Swiftpm LockfilesExplanation PASS. The PR diff changes only Full details: Cmux Swift LoggingExplanation PASS. The production diff adds or updates only Full details: Cmux User-Facing Error PrivacyExplanation PASS — The PR changes keyboard layout constraints and adds an internal Full details: Cmux Full InternationalizationExplanation PASS. The PR changes only keyboard layout logic, an internal state accessor, and UI-test expectations. The added Swift string literals are debug diagnostic markers ( Full details: Cmux Swiftui State LayoutExplanation PASS: The pull request does not introduce SwiftUI changes. The committed diff changes Full details: Cmux Architecture RethinkExplanation PASS. The diff does not introduce the prohibited timing or blocking repair paths, duplicate observers, locks, polling, or delayed dispatch. Existing keyboard notifications and animation code remain present, but the base and head both contain them. The new Full details: Cmux Swift Auxiliary Window Close ShortcutsExplanation PASS: The PR changes only UIKit terminal views, keyboard-docking constraints, an internal Full details: Cmux Source ArtifactsExplanation PASS: The cumulative diff changes only three tracked Swift source/test files: Full details: Cmux No Test Or Debug Seam In Production SourceExplanation No new test/debug seam was added in a production Full details: Cmux No Ambient Global StateExplanation PASS. The production Swift diff adds only instance-owned state and methods to ✨ Finishing Touches 💡 1📝 Generate docstrings 💡
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Greptile SummaryThe PR restores keyboard-layout-guide docking on supported iOS configurations while retaining notification-driven docking for fallback modes.
Confidence Score: 5/5The PR appears safe to merge because no blocking failure remains in the available follow-up review scope. No blocking failure remains. Important Files Changed
Flowchart%%{init: {'theme': 'neutral'}}%%
flowchart TD
A[Keyboard geometry changes] --> B{Guide seat enabled?}
B -->|Yes and chrome visible| C[UIKeyboardLayoutGuide seats dock]
B -->|No or chrome hidden| D[Keyboard notifications seat dock]
C --> E[Static content and natural caps solve wrapper position]
D --> E
E --> F[Terminal and composer follow resolved dock geometry]
Reviews (2): Last reviewed commit: "test(ios): gate the default dock-seat ex..." | Re-trigger Greptile |
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Inline comments:
In `@ios/cmuxUITests/cmuxUITests.swift`:
- Around line 9296-9299: Update the “default dock tracks keyboard” expectation
to derive the expected keyboardDockSource from the runtime OS version, matching
GhosttySurfaceHostView.init: use notification seating for iOS 27 and later, and
layoutGuide below that; keep the keyboard-height validation unchanged.
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The default seat is the system guide on iOS <= 26 and the notification constant on iOS 27, so the default-path UITest derives its expected keyboardDockSource from the simulator's OS version instead of assuming the guide. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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The guide-locked rewrite (#10594/#10687) left iOS 27 on a notification seat that consumes the full keyboard notification stream: did-frame disagreement reseats and steady-state tracker re-derivations. iOS 27 misreports keyboard frames outside the will transaction (#10518 recorded this when it quarantined the rebuilt path away from that OS), so those corrections moved a perfectly settled composer bar after toggles - the regression against the #9958/#10006 path that shipped will-only and was rated perfect in dogfood. Restore that contract, scoped so iOS <= 26 behavior is untouched: - iOS 27 seats ignore keyboardDidChangeFrame entirely and skip the steady-state tracker heal in layoutSubviews (attach recovery in didMoveToWindow stays - it fixes real workspace-switch wedges and did not exist on the old path). - Interrupted legs rebase from live presentation frames before the next will leg (the #10006 reversal contract), folding the live dock bottom into the seat constraint and re-deriving clip and wrapper models from that edge before stripping animations. - TerminalKeyboardSeatSelection (replacing the stale, unused TerminalKeyboardDockPathSelection) owns the seat decision table: guide seat on iOS <= 26, will-only notification seat on iOS 27+, full-stream notification seat behind the iOS <= 26 kill switch. - CMUX_UITEST_FORCE_IOS27_KEYBOARD_SEAT (DEBUG) runs the exact iOS 27 path on any simulator OS; the dock probe reports keyboardSeatWillOnly. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
The guide-locked rewrite (#10594/#10687) left iOS 27 on a notification seat that consumes the full keyboard notification stream: did-frame disagreement reseats and steady-state tracker re-derivations. iOS 27 misreports keyboard frames outside the will transaction (#10518 recorded this when it quarantined the rebuilt path away from that OS), so those corrections moved a perfectly settled composer bar after toggles - the regression against the #9958/#10006 path that shipped will-only and was rated perfect in dogfood. Restore that contract, scoped so iOS <= 26 behavior is untouched: - iOS 27 seats ignore keyboardDidChangeFrame entirely and skip the steady-state tracker heal in layoutSubviews (attach recovery in didMoveToWindow stays - it fixes real workspace-switch wedges and did not exist on the old path). - Interrupted legs rebase from live presentation frames before the next will leg (the #10006 reversal contract), folding the live dock bottom into the seat constraint and re-deriving clip and wrapper models from that edge before stripping animations. - TerminalKeyboardSeatSelection (replacing the stale, unused TerminalKeyboardDockPathSelection) owns the seat decision table: guide seat on iOS <= 26, will-only notification seat on iOS 27+, full-stream notification seat behind the iOS <= 26 kill switch. - CMUX_UITEST_FORCE_IOS27_KEYBOARD_SEAT (DEBUG) runs the exact iOS 27 path on any simulator OS; the dock probe reports keyboardSeatWillOnly. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
* test(ios): files chip must stay visible while the keyboard slides the surface Red half of the regression pair. Since #10594 the host slides the full-height render wrapper up so the render bottom rides the composer bar while the keyboard is up; the files chip is anchored to the surface's own top edge, so the slide carries it above the clipped-visible area and the only Files control disappears whenever the keyboard is shown. Also passes the keyboard frame tracker to GhosttySurfaceHostView in the existing full-height pin test: #10687 added the required parameter without updating this call site, and no CI lane compiles cmuxFeatureTests, so the target has been compile-broken since. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> * fix(ios): pin the files chip to the terminal's visible top while the keyboard is up The chip anchored to the surface's top edge plus safeAreaInsets.top. Since #10594 keyboard motion no longer resizes the surface: the host slides the full-height render wrapper up so the render bottom rides the composer bar, which carries the surface's top edge — and the chip with it — above the clipped-visible area. The only Files control was therefore unreachable whenever the keyboard was shown. The chip now anchors below the highest clipping ancestor's visible top (falling back to safeAreaInsets.top, so resting placement is unchanged and hosts that do not slide are unaffected). A display-link follow re-pins it frame-by-frame during keyboard legs using presentation layers, the same pattern as the dock's absorption follow, with a rest guard so the walk is skipped entirely while nothing can be sliding. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> * fix(ios): unbreak main-red iOS compile in MobileWorkspaceAggregation #10662 assigns the namespaced group id (MobileWorkspaceGroupPreview.ID) directly to anchorWorkspaceID (MobileWorkspacePreview.ID), which does not compile for the iOS app. Convert through rawValue, the same idiom the group preview initializer already uses for its empty-group fallback. Carried on this branch only to unblock the tagged iOS build; same patch offered to main separately. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> * fix(ios): unbreak main-red iOS compile in WorkspaceListTableCoordinator Second iOS compile break from #10662: groupActionCapabilities(for:) was declared fileprivate in WorkspaceListTableCoordinator.swift but is called from the +Actions extension file, so the iOS app does not compile. Widen to internal. Carried on this branch only to unblock the tagged iOS build; same patch offered to main separately. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> * refactor(ios): anchor the files chip in the host's chrome space instead of following the keyboard Replaces the display-link follow from the previous commit with the same adoption the dock already uses: GhosttySurfaceHostView re-homes the chip container (moveArtifactChip(to:), mirroring moveBottomDock(to:)) and the container is constraint-anchored to the host's safe-area top. The keyboard slides only the render wrapper, never the host, so the chip is keyboard-invariant by construction — no per-frame presentation-layer reads, no visible-top ancestor walk, no drift guards. Hostless surfaces (tests) keep the surface-anchored fallback with identical resting placement. Also fixes the artifact-files popover anchor: it was normalized against the surface's bounds, which drift downward by the slide while the keyboard is up; it now normalizes against the view backing the SwiftUI representable. The regression tests now assert the stronger contract directly: the chip's frame in host coordinates is identical before, during, and after a keyboard seat ride. The earlier slid-clip-ancestor unit test modeled the follower design's topology and is superseded by the host-space invariance test. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> --------- Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
…10810) * fix(ios): unbreak the iOS build after the workspace-groups merge Two iOS-only compile errors from #10662 (the Mac target builds; both break every iOS build, so main's iOS lane is red): - MobileWorkspaceAggregation assigns a MobileWorkspaceGroupPreview.ID to anchorWorkspaceID, which is typed MobileWorkspacePreview.ID. Convert through rawValue, the same mapping the type's own initializer uses for exactly this empty-header fallback. - WorkspaceListTableCoordinator.groupActionCapabilities(for:) is fileprivate but called from the context-menu actions extension in WorkspaceListTableCoordinator+Actions.swift, a different file. Make it internal. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> * test(ios): iOS 27 will-only keyboard seat must keep a settled dock still Red half of the regression pair. Forces the iOS 27 keyboard seat via CMUX_UITEST_FORCE_IOS27_KEYBOARD_SEAT and asserts the seat reports the will-only contract, a settled composer bar does not move without a will notification, and rapid reversals keep dock and render pinned. Red today because the force env and the will-only seat do not exist: iOS 27 hosts consume the full notification stream, whose non-will frames misreport on that OS and hop the settled dock. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> * iOS 27: restore the will-only keyboard seat contract The guide-locked rewrite (#10594/#10687) left iOS 27 on a notification seat that consumes the full keyboard notification stream: did-frame disagreement reseats and steady-state tracker re-derivations. iOS 27 misreports keyboard frames outside the will transaction (#10518 recorded this when it quarantined the rebuilt path away from that OS), so those corrections moved a perfectly settled composer bar after toggles - the regression against the #9958/#10006 path that shipped will-only and was rated perfect in dogfood. Restore that contract, scoped so iOS <= 26 behavior is untouched: - iOS 27 seats ignore keyboardDidChangeFrame entirely and skip the steady-state tracker heal in layoutSubviews (attach recovery in didMoveToWindow stays - it fixes real workspace-switch wedges and did not exist on the old path). - Interrupted legs rebase from live presentation frames before the next will leg (the #10006 reversal contract), folding the live dock bottom into the seat constraint and re-deriving clip and wrapper models from that edge before stripping animations. - TerminalKeyboardSeatSelection (replacing the stale, unused TerminalKeyboardDockPathSelection) owns the seat decision table: guide seat on iOS <= 26, will-only notification seat on iOS 27+, full-stream notification seat behind the iOS <= 26 kill switch. - CMUX_UITEST_FORCE_IOS27_KEYBOARD_SEAT (DEBUG) runs the exact iOS 27 path on any simulator OS; the dock probe reports keyboardSeatWillOnly. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> * review: poll the settled dock over a window; document the attach-heal trust tradeoff CodeRabbit findings on #10810: the post-settle stability check now samples the dock edge five times over 1.5s and requires every sample at the settled edge (a transient hop between two single samples could previously pass), and healKeyboardModelFromTracker documents why the will-only seat keeps ATTACH recovery despite the tracker recording did frames iOS 27 can misreport (settled end frame at attach, next will leg corrects a bad record, and skipping recovery wedges the dock after workspace switches mid-transition). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> --------- Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
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Follow-up to #10594 from dogfood: the composer bar should stay pixel-locked to the keyboard through the whole leg, the way the guide-era builds felt. iOS keyboards animate with a private spring that notification-driven followers only approximate, so the dock seat returns to
UIKeyboardLayoutGuidewherever it is trustworthy (chrome visible, iOS ≤ 26), falling back to #10518's notification seat on iOS 27, while chrome is hidden, under the remoteios-keyboard-dock-rebuild-revertkill switch, and under the DEBUG rebuild forces.The race that originally forced the guide out is removed structurally: blank-space absorption is now three static constraints —
wrapper.bottom <= host.bottom,wrapper.bottom <= dock.top + chrome + blank, and an optional priority-750 pull to the natural position — whose constants change only on chrome/content changes, never during a keyboard leg. The wrapper's target comes out of the same layout solve and animation transaction that moves the dock, so the bar and terminal share one timeline by construction on both seat authorities.The kill-switch and defaults parameters on the host are meaningful again (they select the seat authority);
MobileKeyboardFrameTrackerstill heals the keyboard model after detached transitions on every OS. Default-path UITest expectslayoutGuideagain; the forced-rebuild tests exercise the notification seat.HIG: same Virtual keyboards guidance as #10594 — this change moves the dock onto the keyboard layout guide, which is the HIG-recommended integration.
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@codesmith-botwith what you need. Autofix is disabled.Summary by cubic
Locks the composer bar to the keyboard using
UIKeyboardLayoutGuidewhere reliable and makes keyboard absorption static. Old behavior: notification-driven docking that approximated keyboard motion. New behavior: guide-seated docking on iOS ≤26 when chrome is visible, falling back to notifications on iOS 27, while chrome is hidden, under theios-keyboard-dock-rebuild-revertkill switch, or under DEBUG forces. Result: pixel-locked, smoother follow with no mid-leg retargets; wrapper and dock move in the same UIKit transaction..standarddefaults, andkeyboardDockRebuildRevertEnabledselects the notification seat.MobileKeyboardFrameTrackercontinues to heal keyboard height/visibility after detached transitions.Migration
.standardfor defaults in production.keyboardDockSource: derive the expected seat from the runtime OS (layoutGuide on iOS ≤26, notification on iOS 27).Written for commit d16de75. Summary will update on new commits.
Summary by CodeRabbit
Bug Fixes
Tests