Add base keymap presets for keyboard shortcuts

[teamleaderleo]

People coming from iTerm2, Terminal.app or tmux had to rebind cmux shortcuts one at a time, or hand-edit shortcuts.bindings. Settings > Keyboard Shortcuts now has a Base Keymap picker, like Zed's base keymap setting, and the Command Palette has matching Base Keymap: ... commands.

What the user sees

• Picker options: cmux (Default), iTerm2, Terminal.app, tmux-style (Ctrl-B Prefix). When the file matches no single preset, the picker reads Custom.
• Choosing a preset first shows a preview under the picker: each change as Action: old → new, plus Cancel and Apply Keymap. Nothing is written until Apply. For iTerm2 the preview starts with a note that ⌘1…9 moves from workspaces to tabs (workspaces move to ⌥⌘1…9).
• A palette command opens Settings > Keyboard Shortcuts with the same preview. No modal alert.
• The preview is derived from the current bindings (after they have loaded) and planned again on Apply, so edits made while it is open are respected.
• Apply writes only the overrides that differ from cmux defaults into ~/.config/cmux/cmux.json, in the readable string/array form ("cmd+shift+c", ["ctrl+b", "c"]).
• Switching again removes the previous preset's overrides. Choosing cmux removes them all.
• A binding set by hand, in cmux.json or as a legacy Settings (UserDefaults) shortcut, is never overwritten; the preview says it was kept.
• Ownership is inferred from values, not recorded. A binding typed by hand that equals a preset's value for that action counts as that preset's, so switching presets (including back to cmux) replaces or removes it.
• A new binding that macOS claims by default (Spotlight, Mission Control, screenshots, Dock hiding, and so on) gets a warning that names the macOS shortcut and points to System Settings. None of the shipped presets trigger it today.

Presets

Only actions cmux has are mapped. Where a terminal's default already matches cmux, no override is written. For iTerm2 that covers Cmd-D, Cmd-Shift-D, Cmd-Opt-arrows, Cmd-Shift-Return, Cmd-T, Cmd-W and Cmd-Shift-[ / ].

Preset	Overrides
iTerm2	Cmd-1…9 selects surfaces (tabs), Cmd-Opt-1…9 selects workspaces (windows), Cmd-Shift-C toggles copy mode, Cmd-Ctrl-arrows resize panes
Terminal.app	Cmd-Opt-W closes other tabs in the pane, Cmd-Shift-I renames the tab
tmux-style	Ctrl-B prefix: c new workspace, x close tab, & close workspace, n/p next/previous workspace, 1…9 select workspace, , rename workspace, w go to workspace, %/" split right/down, arrows focus pane, o next pane, z zoom, [ copy mode

tmux-style uses cmux's existing two-stroke chords. It maps tmux windows to cmux workspaces, since a workspace is what holds the splits.

How it works

• CmuxSettings owns the logic:
  • the preset table (ShortcutKeymapPreset);
  • the diff (plan(from:legacyBindings:)), which yields writes, removals and kept user bindings, and uses legacy UserDefaults shortcuts for the "before" value;
  • active-preset detection;
  • the macOS default shortcut table (MacOSSystemShortcut.conflicts). It checks both strokes of a chord and expands numbered actions to their 1…9 family.
• JSONConfigStore.applyShortcutKeymap makes one leaf edit per change through the existing set/reset, so comments and other keys survive.
• The Settings row is the only place that applies a plan. The palette hands the chosen preset to it through SettingsRuntime.keymapProposals.
• The active preset is inferred from shortcuts.bindings. No new config key or schema change.

Relation to #14868 (setting actions, settingPresets, cmux config set): this PR stays compatible with it and doesn't build on it.

• A settingPresets entry merges keys but can't remove the keys a previous preset wrote, and switching back to default depends on that.
• This PR adds no top-level key and uses a distinct method name (applyShortcutKeymap), so the two don't collide.
• Once Add setting actions, setting presets, and cmux config set #14868 lands, the leaf edits could move onto its multi-edit mutateRoot to write in one atomic publication.

Verification

• Package tests added in CmuxSettings (ShortcutKeymapPresetTests.swift). The first 15 tests passed locally with swift test --filter "ShortcutKeymap|MacOSSystemShortcut". The follow-up commit added 3 tests (legacy bindings kept, legacy value revealed on removal, hand-typed preset value) that only CI has run. They cover:
  • every override parses, passes the action's binding policy and differs from its default;
  • preset to override diff, switching between presets, and switching back to cmux;
  • user bindings kept (cmux.json and legacy UserDefaults), and a malformed managed binding treated as a customization;
  • active-preset detection;
  • each preset introduces no collision with another cmux action, using the same when-clause and priority rule as the Settings recorder;
  • each preset has no macOS conflicts;
  • macOS conflict detection for single strokes, chords and numbered families;
  • a round trip through JSONConfigStore that keeps comments and unrelated keys.
• Local static checks on the first commit passed: lint-xcstrings.py, localization_catalog.py check (0 parity errors), swift-syntax, project normalization and package groups. The test-wiring and feature-flag checks timed out under machine load; the wiring lints they run printed ok.
• Not verified: the app and CmuxSettingsUI weren't compiled locally, and there's no dogfood on a tagged build yet. CI compiles them. Dogfood should check the picker preview and Apply, the palette opening that preview, and that a tmux chord fires after switching.

Localization: 43 new strings (Settings row and Apply button, summary lines and the iTerm2 note, palette title, preset names, 27 macOS shortcut names), all in the nine required locales of Resources/Localizable.xcstrings. iTerm2, Terminal.app and the %1$@: %2$@ → %3$@ format are recorded as brand/format literals in localization-allowed-omissions.json.

Left out

• Cmd-[ / Cmd-] for iTerm2's previous/next pane. cmux uses them for Focus Back/Forward and browser Back/Forward. Rebinding would either collide with browser Back in browser panes or remove focus history, so the preset leaves them.
• Terminal.app's Cmd-D "Split Window" stacks panes top/bottom. Swapping cmux's split directions for it seemed worse than keeping Cmd-D as split right.
• tmux Ctrl-B Ctrl-arrow resizing: macOS takes Ctrl-arrows for Spaces.
• Conflict checks use macOS's out-of-box shortcuts, not the user's System Settings changes. Ctrl-1…9 (Switch to Desktop) isn't in the table because it's off by default.
• No docs page change. The contributor skill cmux-keyboard-shortcuts now points at the picker.

Changelog

Added: Base Keymap presets (iTerm2, Terminal.app, tmux-style) in Settings > Keyboard Shortcuts and the Command Palette, which write only the differing shortcuts and flag macOS conflicts.

🤖 Generated with Claude Code

Summary by CodeRabbit

• New Features
  • Added Base Keymap presets for cmux, iTerm2, Terminal, and tmux in Keyboard Shortcuts settings.
  • Preview proposed changes before applying them. Previews identify macOS shortcut conflicts and bindings that will be retained.
  • Choose keymap presets from the command palette or find them through settings search.
  • Preset changes preserve hand-set shortcuts and support existing shortcut bindings.

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📥 Commits

Reviewing files that changed from the base of the PR and between 20b4efd and 99ebcf3.

📒 Files selected for processing (23)

• Packages/macOS/CmuxSettings/Sources/CmuxSettings/Stores/JSONConfigStore+ShortcutKeymap.swift
• Packages/macOS/CmuxSettings/Sources/CmuxSettings/Values/MacOSSystemShortcut.swift
• Packages/macOS/CmuxSettings/Sources/CmuxSettings/Values/ShortcutKeymapBinding.swift
• Packages/macOS/CmuxSettings/Sources/CmuxSettings/Values/ShortcutKeymapPlan.swift
• Packages/macOS/CmuxSettings/Sources/CmuxSettings/Values/ShortcutKeymapPreset.swift
• Packages/macOS/CmuxSettings/Tests/CmuxSettingsTests/ShortcutKeymapPresetTests.swift
• Packages/macOS/CmuxSettingsUI/Sources/CmuxSettingsUI/Bindings/ShortcutListModel.swift
• Packages/macOS/CmuxSettingsUI/Sources/CmuxSettingsUI/Environment/SettingsRuntime.swift
• Packages/macOS/CmuxSettingsUI/Sources/CmuxSettingsUI/Environment/ShortcutKeymapProposalInbox.swift
• Packages/macOS/CmuxSettingsUI/Sources/CmuxSettingsUI/Navigation/CuratedSettingEntry+Default.swift
• Packages/macOS/CmuxSettingsUI/Sources/CmuxSettingsUI/Scene/SettingsWindowScene+Sections.swift
• Packages/macOS/CmuxSettingsUI/Sources/CmuxSettingsUI/Sections/KeyboardShortcutsSection.swift
• Packages/macOS/CmuxSettingsUI/Sources/CmuxSettingsUI/Sections/ShortcutKeymapPresetRow.swift
• Packages/macOS/CmuxSettingsUI/Sources/CmuxSettingsUI/Sections/ShortcutKeymapPresetText.swift
• Packages/macOS/CmuxSettingsUI/Tests/CmuxSettingsUITests/SettingsRowAnchorResolutionTests.swift
• Resources/Localizable.xcstrings
• Sources/ContentView+KeymapPresetCommands.swift
• Sources/ContentView.swift
• Sources/SettingsSearchAliases.swift
• Sources/SettingsSearchIndex.swift
• cmux.xcodeproj/project.pbxproj
• scripts/localization-allowed-omissions.json
• skills/cmux-keyboard-shortcuts/SKILL.md

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📒 Files selected for processing (3)

• Packages/macOS/CmuxSettingsUI/Sources/CmuxSettingsUI/Bindings/ShortcutListModel.swift
• Packages/macOS/CmuxSettingsUI/Sources/CmuxSettingsUI/Sections/ShortcutKeymapPresetRow.swift
• Packages/macOS/CmuxSettingsUI/Sources/CmuxSettingsUI/Sections/ShortcutKeymapPresetText.swift

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📝 Walkthrough

Walkthrough

Adds four shortcut keymap presets, computes plans from current file and legacy bindings, and detects macOS shortcut conflicts. Adds Settings and Command Palette flows to preview and apply plans, with localized labels and summaries.

Changes

Shortcut Keymap Presets

Layer / File(s)	Summary
Preset definitions and planning Packages/macOS/CmuxSettings/Sources/CmuxSettings/Values/*ShortcutKeymap*.swift, Packages/macOS/CmuxSettings/Sources/CmuxSettings/Values/MacOSSystemShortcut.swift, Packages/macOS/CmuxSettings/Tests/CmuxSettingsTests/ShortcutKeymapPresetTests.swift	Defines preset bindings and planning behavior. Detects conflicts with built-in macOS shortcuts. Tests cover plan generation, retained bindings, active-preset detection, and conflicts.
Apply plans to JSON settings Packages/macOS/CmuxSettings/Sources/CmuxSettings/Stores/JSONConfigStore+ShortcutKeymap.swift, Packages/macOS/CmuxSettings/Tests/CmuxSettingsTests/ShortcutKeymapPresetTests.swift	Applies plan changes by resetting removed bindings and writing new bindings. Tests check JSON values and preservation of comments and unrelated settings.
Settings and Command Palette integration Packages/macOS/CmuxSettingsUI/Sources/CmuxSettingsUI/Environment/*, Packages/macOS/CmuxSettingsUI/Sources/CmuxSettingsUI/Bindings/ShortcutListModel.swift, Packages/macOS/CmuxSettingsUI/Sources/CmuxSettingsUI/Navigation/CuratedSettingEntry+Default.swift, Packages/macOS/CmuxSettingsUI/Sources/CmuxSettingsUI/Scene/SettingsWindowScene+Sections.swift, Packages/macOS/CmuxSettingsUI/Sources/CmuxSettingsUI/Sections/*, Packages/macOS/CmuxSettingsUI/Tests/CmuxSettingsUITests/SettingsRowAnchorResolutionTests.swift, Sources/ContentView+KeymapPresetCommands.swift, Sources/ContentView.swift, Sources/SettingsSearchAliases.swift, Sources/SettingsSearchIndex.swift, Resources/Localizable.xcstrings, scripts/localization-allowed-omissions.json, cmux.xcodeproj/project.pbxproj, skills/cmux-keyboard-shortcuts/SKILL.md	Adds a preset picker and preview in Keyboard Shortcuts settings. Command Palette actions propose presets for preview. Adds localized text, search terms, project registration, and keyboard-shortcut guidance.

Priority: ➖ Normal

Estimated code review effort: 4 (Complex) | ~45 minutes

Change: Feature

Sequence Diagram(s)

sequenceDiagram
  participant ContentView
  participant ShortcutKeymapProposalInbox
  participant ShortcutKeymapPresetRow
  participant ShortcutKeymapPreset
  participant JSONConfigStore
  ContentView->>ShortcutKeymapProposalInbox: Set proposed preset
  ContentView->>ShortcutKeymapPresetRow: Open Keyboard Shortcuts settings
  ShortcutKeymapPresetRow->>ShortcutKeymapProposalInbox: Consume proposed preset
  ShortcutKeymapPresetRow->>ShortcutKeymapPreset: Create plan from current bindings
  ShortcutKeymapPresetRow->>JSONConfigStore: Apply plan

Loading

Merge Risk: ⚪ Minimal · up to 20b4e

No merge-blocking issue was established. A filesystem failure during preset application could leave a partial keymap, which can be corrected by applying the preset again once writes succeed.

Security Architecture Review

Security architecture risk: 🟡 Moderate · up to 20b4e

Preset changes are limited to the local user's shortcuts and require confirmation, but a failed application can leave a mixture of keymaps, and an edit made during application can be overwritten. The available evidence does not show a new remote or privileged entrypoint.

Retained concerns

• Medium · reliability · observed: A failed or interrupted preset application can persist only some removals or additions, leaving a mixed shortcut configuration without apply-wide rollback.
• Medium · architecture · inferred: Apply respects hand edits already visible to the model, but a same-action edit made after planning can be overwritten by a later preset write without checking the planned prior value.

Security review details

Security Blast Radius

• inferred — The observed new path changes the invoking user's persisted shortcut bindings, not a service identity or deployment configuration. Its immediate exposure is local keyboard behavior and user-owned configuration.

Trust Boundaries and Controls

• observed — The observed Command Palette producer passes a typed preset proposal to Settings rather than directly writing bindings; Settings requires a separate Apply action.

Resilience and Maintainability Implications

• inferred — Per-write atomicity limits torn-file exposure, but it does not preserve shortcut ownership or a consistent preset state across an entire failed or concurrent application.

Hardening Proposals

• proposed — Consider applying the preset as one conditional configuration transition: check targeted bindings against the planned source values and commit all changes together, or provide conflict-aware rollback and recovery.

---

Important

Pre-merge checks failed

Please resolve all errors before merging. Addressing warnings is optional.

❌ Failed checks (5 errors, 1 warning)

Check name	Status	Explanation	Resolution
Cmux Cache Substitution Correctness	❌ Error	The new keymap persistence path plans from ShortcutKeymapPresetRow.snapshot, which uses model.latestBindings rather than a fresh authoritative read. latestBindings prefers pendingBindings; tha…	Before planning or applying, read the current ShortcutBindingsSnapshot and legacy bindings from their authoritative stores, and do not let pendingBindings substitute for that read. Replan immediately before persistence, or add an expect…
Cmux Swift Concurrency	❌ Error	The new ShortcutKeymapPresetRow.apply starts an unretained Task { ... } for the real preset-write operation. The task is not stored or cancelled, although isApplying and UI state depend on its c…	Make the apply operation caller-owned. Store the returned Task<Void, Never> in row-owned or model-owned state, cancel it before a replacement and when the row lifecycle ends, and check cancellation before changing isApplying, `proposedP…
Cmux User-Facing Error Privacy	❌ Error	The new Base Keymap Apply path forwards raw internal errors to a cmux user. ShortcutKeymapPresetRow.apply catches applyShortcutKeymap failures and calls model.errorLog.record(error, keyID: ...).…	Sanitize this failure at the UI boundary. Show a localized, generic message such as “Could not apply the base keymap. Check cmux.json permissions or fix the configuration, then try again.” Do not pass the caught Error or its `localizedDes…
Cmux Full Internationalization	❌ Error	The PR adds 43 user-facing Base Keymap, preview, command, and macOS-conflict localization keys. The new Swift text uses String(localized:defaultValue:), but every added key in `Resources/Localizable…	Add translated localizations entries in Resources/Localizable.xcstrings for bs, da, it, km, nb, pl, pt-BR, ru, th, tr, and uk on every one of the 43 new keys. Preserve all format placeholders, including %@ and `%…
Cmux Architecture Rethink	❌ Error	The PR introduces a mutable MainActor side channel for a transient UI proposal. ContentView+KeymapPresetCommands.swift writes runtime.keymapProposals.preset, SettingsRuntime owns the shared `Sho…	Make the settings presentation coordinator own one value-based transition. Pass ShortcutKeymapPreset as an explicit navigation/request payload to the Keyboard Shortcuts section, or route it through a coordinator action that opens the targ…
Docstring Coverage	⚠️ Warning	Docstring coverage is 18.18% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 44 functions across 18 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (19 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Cmux Cloud Persistent Session And Early Input	✅ Passed	PASS: The pull request changes keyboard-shortcut keymap presets, settings UI, command-palette entries, localization, and related tests. The authoritative diff contains no Cloud terminal creation, cmux…
Cmux Swift Actor Isolation	✅ Passed	No actor-isolation failure is introduced. The new value models in CmuxSettings conform to Sendable. JSONConfigStore is an actor, so applyShortcutKeymap performs actor-isolated writes with `awa…
Cmux Swift Blocking Runtime	✅ Passed	The production Swift diff adds no blocking or timing primitives covered by the rule. The new apply path is async and uses try await set/reset; the UI uses Task only to perform that async work. S…
Cmux Browser Automation Off-Main	✅ Passed	PASS: The PR changes keymap presets, settings UI, localization, and command-palette entries. It does not modify Sources/TerminalController.swift or ControlCommandExecutionPolicy.swift, and the dif…
Cmux Expensive Synchronous Load	✅ Passed	PASS: The PR adds shortcut-keymap planning and UI state only. The new @MainActor row performs bounded in-memory preset calculations, and the command-palette handler transfers a preset to Settings. The…
Cmux No Hacky Sleeps	✅ Passed	PASS: The authoritative diff changes 19 Swift files plus localization, project metadata, JSON, and documentation. It changes no TypeScript, JavaScript, shell, or covered build/runtime script. The conf…
Cmux Algorithmic Complexity	✅ Passed	The PR adds scans only over fixed enum collections and bounded preset data. ShortcutKeymapPreset.plan iterates ShortcutAction.allCases; active checks four static presets and their static overrid…
Cmux Swift @Concurrent	✅ Passed	No violation found. The new file-writing method is an actor-isolated JSONConfigStore method and the @MainActor UI caller invokes it with await, providing an explicit actor hop. The diff adds no …
Cmux Swift Package Boundaries	✅ Passed	PASS. The independently testable keymap domain logic is in the existing CmuxSettings SwiftPM target: ShortcutKeymapPreset, ShortcutKeymapPlan, ShortcutKeymapBinding, MacOSSystemShortcut, and…
Cmux Swiftpm Lockfiles	✅ Passed	PASS. The pull request changes cmux.xcodeproj/project.pbxproj only to register ContentView+KeymapPresetCommands.swift as a file reference and source. It does not add, remove, or change any `XCRemo…
Cmux Swift Logging	✅ Passed	PASS. The reviewed Swift additions contain no production print, debugPrint, dump, NSLog, Logger, stdout/stderr, or ad hoc diagnostic file logging. The only .write(to:) call is test fixture…
Cmux Swiftui State Layout	✅ Passed	PASS. The new keymap UI uses @Observable for ShortcutKeymapProposalInbox and @State for local view state. It adds no ObservableObject, @Published, @StateObject, @EnvironmentObject, or `G…
Cmux Swift Auxiliary Window Close Shortcuts	✅ Passed	The PR adds a settings row and a Command Palette handler. It does not add or materially change an NSWindow, NSPanel, NSWindowController, SwiftUI Window, or WindowGroup. The handler opens the existing …
Cmux Source Artifacts	✅ Passed	The diff contains only intentional product source, tests, UI code, localization catalog entries, project configuration, localization configuration, and durable documentation. No changed path is a log,…
Cmux No Test Or Debug Seam In Production Source	✅ Passed	The production Swift diff adds no test-build guards, test-only members, or debug…/ForTesting/TestHook/TestSeam accessors. The only matching added text is an existing debugSource: argument us…
Title check	✅ Passed	The title clearly and concisely summarizes the primary change: adding base keymap presets for keyboard shortcuts.
Description check	✅ Passed	The description is detailed and covers the user-visible behavior, implementation, testing, localization, limitations, and changelog. It does not include the template's Demo Video or Checklist sections…

Full details: Cmux Cache Substitution Correctness

Explanation

The new keymap persistence path plans from ShortcutKeymapPresetRow.snapshot, which uses model.latestBindings rather than a fresh authoritative read. latestBindings prefers pendingBindings; that optimistic map can remain older than cmux.json while an edit is in flight, even when the event-driven bindings value receives an external update. The row does not block on or refresh this state, and applyShortcutKeymap applies the cached plan without checking each change.before against the current file. The hasLoadedBindings guard handles a cold model, but stale pending or missed external changes can still cause preset writes or removals to overwrite current user bindings.

Resolution

Before planning or applying, read the current ShortcutBindingsSnapshot and legacy bindings from their authoritative stores, and do not let pendingBindings substitute for that read. Replan immediately before persistence, or add an expected-before compare-and-set to applyShortcutKeymap so it aborts and refreshes when the file differs. Keep the cold-load guard, and ensure pending writes cannot run concurrently with keymap application without a fresh replan.

Full details: Cmux Swift Concurrency

Explanation

The new ShortcutKeymapPresetRow.apply starts an unretained Task { ... } for the real preset-write operation. The task is not stored or cancelled, although isApplying and UI state depend on its completion. This matches the rule's fire-and-forget lifecycle failure. The new proposal inbox uses Observation, not Combine, and the diff adds no other flagged concurrency pattern.

Resolution

Make the apply operation caller-owned. Store the returned Task<Void, Never> in row-owned or model-owned state, cancel it before a replacement and when the row lifecycle ends, and check cancellation before changing isApplying, proposedPreset, or recording results. Keep JSONConfigStore.applyShortcutKeymap as the async-throws operation and invoke it from that owned task.

Full details: Cmux User-Facing Error Privacy

Explanation

The new Base Keymap Apply path forwards raw internal errors to a cmux user. ShortcutKeymapPresetRow.apply catches applyShortcutKeymap failures and calls model.errorLog.record(error, keyID: ...). SettingsErrorLog.record stores error.localizedDescription, and SettingsWindowScene presents the latest entry in a user-facing alert as shortcuts.bindings: <raw message>. The new path is absent from the base revision. The thrown errors include JSON parse errors, JSONC edit errors, filesystem/POSIX errors, and internal write-conflict errors, so the alert can expose implementation details or raw diagnostics. This violates the rule against forwarding internal errors to end users.

Resolution

Sanitize this failure at the UI boundary. Show a localized, generic message such as “Could not apply the base keymap. Check cmux.json permissions or fix the configuration, then try again.” Do not pass the caught Error or its localizedDescription to the user-facing error log. If diagnostics are needed, send only safe, bounded details to internal logging and exclude paths, payloads, config values, and raw parser or upstream messages.

Full details: Cmux Full Internationalization

Explanation

The PR adds 43 user-facing Base Keymap, preview, command, and macOS-conflict localization keys. The new Swift text uses String(localized:defaultValue:), but every added key in Resources/Localizable.xcstrings has entries only for ar, de, en, es, fr, ja, ko, zh-Hans, and zh-Hant. The touched catalog already supports bs, da, it, km, nb, pl, pt-BR, ru, th, tr, and uk, so all 43 added keys lack entries for those 11 locales.

Resolution

Add translated localizations entries in Resources/Localizable.xcstrings for bs, da, it, km, nb, pl, pt-BR, ru, th, tr, and uk on every one of the 43 new keys. Preserve all format placeholders, including %@ and %1$@-style placeholders, and do not use copied English or empty values.

Full details: Cmux Architecture Rethink

Explanation

The PR introduces a mutable MainActor side channel for a transient UI proposal. ContentView+KeymapPresetCommands.swift writes runtime.keymapProposals.preset, SettingsRuntime owns the shared ShortcutKeymapProposalInbox, and ShortcutKeymapPresetRow later reads and clears it in .onAppear/.onChange before storing a second copy in @State proposedPreset. This splits the UI lifecycle across the command surface, runtime inbox, and settings row. It leaves stale or cross-window proposals representable when presentation or mounting changes, and it duplicates ownership of the proposed preset. The changed apply logic itself has one shared path; the architectural failure is the newly introduced proposal transport.

Resolution

Make the settings presentation coordinator own one value-based transition. Pass ShortcutKeymapPreset as an explicit navigation/request payload to the Keyboard Shortcuts section, or route it through a coordinator action that opens the target and initializes the row from that value snapshot. Let the row or ShortcutListModel own the preview state and apply transition. Remove ShortcutKeymapProposalInbox, its SettingsRuntime property, and the .onAppear/.onChange consume-and-clear path. The first migration cut is to replace the inbox write/read with an openPreferencesWindow request carrying the preset, then verify that failed presentation and multiple settings roots cannot retain or consume a stale proposal.

✨ Finishing Touches 💡 3

📝 Generate docstrings 💡

• Commit to this branch
• Create a new PR

⚔️ Resolve merge conflicts 💡

• Resolve merge conflict in branch shortcut-keymap-presets

🛠️ Fix failing CI checks 💡

• Commit to this branch
• Create a new PR

🧪 Generate unit tests (beta)

• Commit to this branch
• Create a new PR

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• 🪄 Fix CodeRabbit comments on this PR

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Inline comments:
In
@Packages/macOS/CmuxSettingsUI/Sources/CmuxSettingsUI/Sections/ShortcutKeymapPresetRow.swift:
- Around line 64-66: Update the Apply path for the preview created from
proposedPlan to compare current persisted bindings with the preview baseline
under the store’s write lock before applying. If they differ, rebuild or reject
the plan rather than applying stale writes; include legacy UserDefaults bindings
in the baseline when they affect plan ownership.

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📥 Commits

Reviewing files that changed from the base of the PR and between 8c744df and a999923.

📒 Files selected for processing (22)

• Packages/macOS/CmuxSettings/Sources/CmuxSettings/Stores/JSONConfigStore+ShortcutKeymap.swift
• Packages/macOS/CmuxSettings/Sources/CmuxSettings/Values/MacOSSystemShortcut.swift
• Packages/macOS/CmuxSettings/Sources/CmuxSettings/Values/ShortcutKeymapBinding.swift
• Packages/macOS/CmuxSettings/Sources/CmuxSettings/Values/ShortcutKeymapPlan.swift
• Packages/macOS/CmuxSettings/Sources/CmuxSettings/Values/ShortcutKeymapPreset.swift
• Packages/macOS/CmuxSettings/Tests/CmuxSettingsTests/ShortcutKeymapPresetTests.swift
• Packages/macOS/CmuxSettingsUI/Sources/CmuxSettingsUI/Environment/SettingsRuntime.swift
• Packages/macOS/CmuxSettingsUI/Sources/CmuxSettingsUI/Environment/ShortcutKeymapProposalInbox.swift
• Packages/macOS/CmuxSettingsUI/Sources/CmuxSettingsUI/Navigation/CuratedSettingEntry+Default.swift
• Packages/macOS/CmuxSettingsUI/Sources/CmuxSettingsUI/Scene/SettingsWindowScene+Sections.swift
• Packages/macOS/CmuxSettingsUI/Sources/CmuxSettingsUI/Sections/KeyboardShortcutsSection.swift
• Packages/macOS/CmuxSettingsUI/Sources/CmuxSettingsUI/Sections/ShortcutKeymapPresetRow.swift
• Packages/macOS/CmuxSettingsUI/Sources/CmuxSettingsUI/Sections/ShortcutKeymapPresetText.swift
• Packages/macOS/CmuxSettingsUI/Tests/CmuxSettingsUITests/SettingsRowAnchorResolutionTests.swift
• Resources/Localizable.xcstrings
• Sources/ContentView+KeymapPresetCommands.swift
• Sources/ContentView.swift
• Sources/SettingsSearchAliases.swift
• Sources/SettingsSearchIndex.swift
• cmux.xcodeproj/project.pbxproj
• scripts/localization-allowed-omissions.json
• skills/cmux-keyboard-shortcuts/SKILL.md

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[github-actions]

Merge receipt for 99ebcf3f13: every check was green at merge (22 verified; 17 skipped by policy). Full suite runs on main after merge.