[teamleaderleo]

The sidebar's Priority view sent every pick through DeepLink(.session(id)), which opens the chat
in the active window's focused pane. AgentActivityLane.workspaceID — the workspace acpmux
bound that session to (_meta.acpmux.workspaceId) — was assigned in AgentActivityLane.of(summary:)
and read nowhere in the app. So picking a lane that belongs to another workspace took over the
workspace the person was looking at, and nothing recorded the jump, so Back did not bring them back.

A pick now goes where the chat lives:

1. the tab already showing it, revealed wherever it is;
2. else the workspace the session is bound to: that workspace is shown first
   (windows.reveal(workspaceID:), the palette's own switcher path), then the chat opens in a pane
   there — waiting for that workspace's first pane to mount, and giving up if the window closes or
   moves on;
3. else the focused pane, exactly as before (no binding, or a workspace this app no longer has).

locationTrail.noteJump() now runs for every pick, so the next settled location is its own trail
step even within one workspace and Back leaves the chat again — the softlock.

The choice itself is a value, AgentChatJump (with a nested PaneWait), so it is covered without
the app's services.

Leo-ask: ask-6d920c42d9

I FUCKING HATE THIS NEEDS YOUR INPUT BUTTON FRIST OFF IT'D FUCKIGN SOFTLOCK ME BC IT DOESNT JUMP
TO ANOTHER WORKSPACE IT OVERRIDES THSI WORKSPACE PLUS THE UI/UX IS JUST BAD ALL AROUND IDK

This PR is the first two complaints, which have one cause. The third ("the UI/UX is just bad all
around") is not specific enough to guess a redesign from; it is back with Leo for specifics rather
than reinterpreted here.

Proof

Red before green, each failing test committed before its fix:

Commit
529a0cca593f	AgentChatJumpTests with today's behaviour extracted verbatim — aChatBoundToAnotherWorkspaceOpensInThatWorkspace fails
1461ef7f8d6b	the binding is used — that test passes
f5ea284acc64	aWorkspaceWithNoPaneYetWaitsForOne fails (the jump gave up with "no pane")
d33da039de6c, a41661eba13c, 05fed352d857	the pane wait, and its end when the window closes or moves on

The red commits extract the shipped behaviour rather than stubbing it, so each failure is the real
bug.

The focused command could not be executed on the fleet. scripts/ci/package-test-lane.sh suite Packages/macOS/CmuxNext AgentChatJumpTests calls ensure_web_bundles unconditionally for that
package, and the web bundles do not build on base: gen-strings.mjs fails on 48 missing
translations for base's own settings.sidebar.style keys. Both runs (at 529a0cca593f and at the
head) stopped there with error: the cmux-next web bundles did not build, on aws-m4pro-8, before
reaching a single test. That blocks every lane's CmuxNext Swift suite right now, not just this one;
it is written up with evidence in a comment below and wants its own PR.

What did execute on this head: cmux-next app compile (build fleet) passes, and cmux-next fast tier passes — that lane runs swift build --build-tests, so the new test file and the new
source both compile. package-conventions-lint passes here while it is red at base tip.

Changelog

Fixed: Picking a chat in the sidebar's Priority view switches to that chat's own workspace instead
of taking over the one on screen, and Back returns to where you were.

Observed / Not run

Observed, on this head: cmux-next app compile (build fleet) green; cmux-next fast tier green;
scripts/cmux-next/prepush-gate.py — no new violations;
./scripts/lint-ios-package-conventions.sh — the one ERROR it prints
(CmuxNextPages/AppsPageNativeOps.swift:3) reproduces identically in a clean worktree at base tip
123a1ec9d794d, and that file is byte-identical to base here.

Not run: no Swift compile or test locally — this is a Linux host and agents do not build the Mac app
on a person's Mac. The AgentChatJumpTests suite has not been executed anywhere, for the base
reason above; the review of these three files rests on reading and hand-tracing plus the two green
compile lanes. All five CI reds on this head are base findings, each reproduced at base tip or red
on base tip's own run (see the comment below).

No capture: this changes which workspace a jump lands in, not how anything is drawn — there is no
visual difference to capture, and the AgentChatJumpTests cases state the behaviour.

🤖 Generated with Claude Code

Agent session: big-red

[teamleaderleo]

Owned by deeplink-message on cosmic-gray · session

[github-actions]

cmux status _{(one comment, edited in place; each line is updated by the job that owns it)}

Review cc5e0e1: HQ feed card · gallery before/after runs · checks

App of this head (app.zip, kept 1 day)

gh workflow run reload-build.yml -R manaflow-ai/cmux --ref feat-cmux-next -f tag=pr23926 -f ref=cmux/priority-jump-workspace -f platform=macos -f backend_mode=local

red: cmux-next checks (god files, concurrency, crash safety, l10n); no finished base run on 04b4a4c to compare; do not merge until green; see lane-rules
red: cmux-next page strings generate; base red: the same failure on the base 04b4a4c; does not block

Tour of cc5e0e11a7 (run)

The path-selected recorder failed for core-after, core-before; see the run artifact and failed manifests.

Path-selected interactions

Interaction	Changed paths
core	Packages/macOS/CmuxNext/Sources/CmuxNextApp/AgentActivity/AgentActivityPageService.swift Packages/macOS/CmuxNext/Sources/CmuxNextApp/AgentActivity/AgentChatJump.swift Packages/macOS/CmuxNext/Tests/CmuxNextAppTests/AgentChatJumpTests.swift

Core UI (before): FAILED — 16 ok, 3 failed, 1 unavailable

Video (mp4)

#	Step	Result	Command
1	Launch	ok
2	New workspace	ok	cmux workspace new --name Tour
3	Type in the terminal	ok	cmux workspace name:Tour screen current pane current tab current terminal current write --text "echo hello from the cmux-next tour\r"
4	A command reports progress: tab loading spinner	ok	cmux workspace name:Tour screen current pane current tab current terminal current write --text "clear; printf '\\033]9;4;3\\007'; sleep 900\r"
5	Split right	failed: exited 1	cmux action run splitRight
6	Split down	failed: exited 1	cmux action run splitDown
7	New terminal tab	failed: exited 1	cmux action run newSurface
8	Browser tab	ok	cmux tab new-browser --url https://example.com
9	Hide the sidebar	ok	cmux action run toggleSidebar
10	Show the sidebar	ok	cmux action run toggleSidebar
11	Notification	ok	cmux notify --title Tour --body "Hello from CI"
12	Notifications panel	ok	cmux action run showNotifications
13	Agent chat	ok	cmux agent new-chat
14	Agent workspace	ok	cmux workspace new --name Agent
15	Agent starts	ok	cmux workspace name:Agent screen current pane current tab current terminal current write --text "clear; printf '\\033]7501;state=working\\033\\\\'; sleep 8; printf '\\033]7501;state=done\\033\\\\'; sleep 900\r"
16	An agent works: row working spinner	ok	cmux workspace new --name Notes
17	The agent finishes: done mark in the spinner's place	ok
18	Session tree: keycaps on the first rows	ok	cmux settings set sidebar.sessionTree true
19	Session tree back off for later tours	ok	cmux settings set sidebar.sessionTree false
20	Profile menu	unavailable: exited 1 (the menu shot needs a screen capture route)	cmux action run sidebar.profileMenu

Failed steps:

5. Split right


6. Split down


7. New terminal tab

Screenshots (12)

1. Launch


2. New workspace


3. Type in the terminal


4. A command reports progress: tab loading spinner


8. Browser tab


9. Hide the sidebar


11. Notification


12. Notifications panel


13. Agent chat


16. An agent works: row working spinner


17. The agent finishes: done mark in the spinner's place


18. Session tree: keycaps on the first rows

### Core UI \(after\): FAILED — 16 ok, 3 failed, 1 unavailable

Video (mp4)

#	Step	Result	Command
1	Launch	ok
2	New workspace	ok	cmux workspace new --name Tour
3	Type in the terminal	ok	cmux workspace name:Tour screen current pane current tab current terminal current write --text "echo hello from the cmux-next tour\r"
4	A command reports progress: tab loading spinner	ok	cmux workspace name:Tour screen current pane current tab current terminal current write --text "clear; printf '\\033]9;4;3\\007'; sleep 900\r"
5	Split right	failed: exited 1	cmux action run splitRight
6	Split down	failed: exited 1	cmux action run splitDown
7	New terminal tab	failed: exited 1	cmux action run newSurface
8	Browser tab	ok	cmux tab new-browser --url https://example.com
9	Hide the sidebar	ok	cmux action run toggleSidebar
10	Show the sidebar	ok	cmux action run toggleSidebar
11	Notification	ok	cmux notify --title Tour --body "Hello from CI"
12	Notifications panel	ok	cmux action run showNotifications
13	Agent chat	ok	cmux agent new-chat
14	Agent workspace	ok	cmux workspace new --name Agent
15	Agent starts	ok	cmux workspace name:Agent screen current pane current tab current terminal current write --text "clear; printf '\\033]7501;state=working\\033\\\\'; sleep 8; printf '\\033]7501;state=done\\033\\\\'; sleep 900\r"
16	An agent works: row working spinner	ok	cmux workspace new --name Notes
17	The agent finishes: done mark in the spinner's place	ok
18	Session tree: keycaps on the first rows	ok	cmux settings set sidebar.sessionTree true
19	Session tree back off for later tours	ok	cmux settings set sidebar.sessionTree false
20	Profile menu	unavailable: exited 1 (the menu shot needs a screen capture route)	cmux action run sidebar.profileMenu

Failed steps:

5. Split right


6. Split down


7. New terminal tab

Screenshots (12)

1. Launch


2. New workspace


3. Type in the terminal


4. A command reports progress: tab loading spinner


8. Browser tab


9. Hide the sidebar


11. Notification


12. Notifications panel


13. Agent chat


16. An agent works: row working spinner


17. The agent finishes: done mark in the spinner's place


18. Session tree: keycaps on the first rows

_{Tours are data in scripts/cmux-next/media/tours: add a step or a tour file to show your feature.}

[blacksmith-sh]

Found 11 test failures on Blacksmith runners:

Failures

Test	View Logs
/tmp/tmpmn18ywpa/summary-fail.json (live):/summary-fail.json (live):	View Logs
/tmp/tmprl0f1hbd/summary-missing.json (live):/summary-missing.json (live):	View Logs
[new_workspaces] debug.new_workspace timed 0 of 50 new workspace rows/ [new_workspaces] debug.new_workspace timed 0 of 50 new workspace rows	View Logs
[new_workspaces] the window draws no frames/[new_workspaces] the window draws no frames	View Logs
[tabs] debug.tab_switch timed 0 of 40 switches/ [tabs] debug.tab_switch timed 0 of 40 switches	View Logs
[tabs] the window draws no frames/[tabs] the window draws no frames	View Logs
convention violations found (ERROR lines above)./ convention violations found (ERROR lines above).	View Logs
test_base_passes (main.NoticesPairTests.test_base_passes)/ test_base_passes (main.NoticesPairTests.test_base_passes)	View Logs
test_every_submodule_free_checkout_on_an_owned_runner_resets_submodules (main.Reuse dWorkspaceSubmodules.test_every_submodule_free_checkout_on_an_owned_runner_resets_submo dules)/ test_every_submodule_free_checkout_on_an_owned_runner_resets_submodules (main.Reuse dWorkspaceSubmodules.test_every_submodule_free_checkout_on_an_owned_runner_resets_submo dules)	View Logs
test_every_submodule_free_checkout_on_an_owned_runner_resets_submodules (main.Reuse dWorkspaceSubmodules.test_every_submodule_free_checkout_on_an_owned_runner_resets_submo dules) (job='web-bundles')/ test_every_submodule_free_checkout_on_an_owned_runner_resets_submodules (main.Reuse dWorkspaceSubmodules.test_every_submodule_free_checkout_on_an_owned_runner_resets_submo dules) (job='web-bundles')	View Logs

...and 1 more test failures. View all on Blacksmith

^{Need help on this PR? Tag @codesmith-bot with what you need.}

[teamleaderleo]

Bead cx-z9p2k created for this PR by the cmux coordinator.

[teamleaderleo]

cmux-next crash-class rules / cmux-next crash-class rules is red on 13 of 13 fresh feat-cmux-next PR heads in the last 2:00:00, so it is most likely a base red, not this PR's. The base-reds lane has it; a base merge picks up the fix once it lands.

[teamleaderleo]

cmux-next guards / nightly-guards / workflow-guard-tests / release-notary is red on 17 of 22 fresh feat-cmux-next PR heads in the last 2:00:00, so it is most likely a base red, not this PR's. The base-reds lane has it; a base merge picks up the fix once it lands.

[teamleaderleo]

Review (codex gpt-6.1-sol): SHIP at 05fed35

Independent Codex review at xhigh (acpmux on cmux16), read-only. Three rounds: it blocked on a lost open when no pane had mounted yet (fixed in d33da03), a wait that outlived a window close or a switch to an already-mounted workspace (fixed in a41661e), and a closed window still counting as open (fixed in 05fed35). Final: "No blocking findings. AgentActivityPageService.swift:92 now checks isOpen, so closing a retained window produces .stop and ends the wait." No build or tests by the reviewer. Fleet cmux-ci compile-check --app at 05fed35 passed (job 695edae627d535e2831bc4a7).

[teamleaderleo]

cmux-next guards / cmux-next page strings generate is red on 10 of 10 fresh feat-cmux-next PR heads in the last 2:00:00, so it is most likely a base red, not this PR's. The base-reds lane has it; a base merge picks up the fix once it lands.

[teamleaderleo]

cmux-next / cmux-next web bundles (source-keyed cache) is red on 6 of 10 fresh feat-cmux-next PR heads in the last 2:00:00, so it is most likely a base red, not this PR's. The base-reds lane has it; a base merge picks up the fix once it lands.

[teamleaderleo]

cmux-next / cmux-next checks (god files, concurrency, crash safety, l10n) › Checks job structure is red on 13 of 13 fresh feat-cmux-next PR heads in the last 2:00:00, so it is most likely a base red, not this PR's. The base-reds lane has it; a base merge picks up the fix once it lands.

[teamleaderleo]

cmux-next / cmux-next checks (god files, concurrency, crash safety, l10n) › No fleet host names in gallery fixtures is red on 12 of 13 fresh feat-cmux-next PR heads in the last 2:00:00, so it is most likely a base red, not this PR's. The base-reds lane has it; a base merge picks up the fix once it lands.

[teamleaderleo]

cmux-next / cmux-next checks (god files, concurrency, crash safety, l10n) › No new SwiftUI (macOS UI is AppKit) is red on 11 of 11 fresh feat-cmux-next PR heads in the last 2:00:00, so it is most likely a base red, not this PR's. The base-reds lane has it; a base merge picks up the fix once it lands.

[teamleaderleo]

Head cc5e0e11a71e5: all five reds are the base's, from three causes

This PR's diff against 123a1ec9d794d is three files, all under
Packages/macOS/CmuxNext/.../AgentActivity/ plus its test. None of the files named below is in it.

1. 48 missing locale strings for base's settings.sidebar.style — two reds

cmux-next page strings generate and cmux-next web bundles (source-keyed cache) both fail on the
same thing: settings.sidebar.style, settings.sidebar.style.help, settings.choice.sidebarRail
and settings.choice.sidebarStandard are missing in 12 locales (bs, da, it, km, nb, …), 48 strings.

Those keys live in base's CmuxNextSettings/SidebarSectionsSetting.swift,
CmuxNextSettings/Localizable.xcstrings and schemas/settings/settings-schema.json. This PR
changes no .xcstrings, settings or schema file and adds no user-facing string (it reuses
MiscHandlerStrings.noPane).

Reproduced at the base tip, not just asserted: in a clean worktree at 123a1ec9d794d,
CMUX_STRINGS_BEST_EFFORT="" node webviews/scripts/pages/gen-strings.mjs — the exact command the
guard job runs — prints the identical 48 missing strings. cmux-next web bundles is the same
generator, called as bun scripts/pages/gen-strings.mjs --best-effort, and it is red on base tip's
own run too.

2. AppsPageNativeOps and the namespace lint — cmux-next checks

ERROR namespace-type Packages/macOS/CmuxNext/Sources/CmuxNextPages/AppsPageNativeOps.swift:3
  struct AppsPageNativeOps (all-static public surface, not instantiable)

That file is byte-identical to base here. ./scripts/lint-ios-package-conventions.sh prints the
same single ERROR in a clean worktree at 123a1ec9d794d. #24330 converted the two caseless enums
the lint rejected into structs; the lint also rejects an all-static struct, so this one surfaced.

3. Ghostty license notices — nightly-guards / Guard status

workflow-guard-tests / release-notary fails NoticesPairTests.test_base_passes plus three
CheckBundleNoticesTest errors, over cmux-tui/build-support/notices/ghostty/pinned-licenses/MANIFEST.json
(a changed manifest digest, pkg/simdutf/vendor/simdutf.cpp unreviewed, z2d 0.11→0.12) and a
missing THIRD_PARTY_LICENSES.md in the tests' temp checkout. Guard status is the aggregator and
reports workflow-guard-tests: failure, so it follows that root check. This PR touches no notices,
submodule or workflow file.

nightly-guards / Guard status and cmux-next web bundles are red on base tip 123a1ec9d794d's own
check runs, together with cmux app scheme compile (Debug), ios-tests and
package-conventions-lint — two of which are not even red on this PR.

Green on this head

cmux-next app compile (build fleet) and cmux-next fast tier (which runs
swift build --build-tests, so the new test file compiles) both pass, and package-conventions-lint
passes here while it is red at base tip.

These base findings are linked, not fixed here: each wants its own PR.

🤖 Generated with Claude Code

[teamleaderleo]

Review (Explore): SHIP at cc5e0e1

An independent subagent reviewed this exact head, reading the real definitions rather than
trusting the diff. No blocking findings. Highlights of what it verified:

• The ID spaces match, which is the whole fix. Mux::new_workspace_key emits a lowercase
  8-4-4-4-12 hex UUID (workspace_identity.rs:32, {:02x}) and WorkspaceModel.id is that raw
  key; CMUX_WORKSPACE_ID is the uppercased form, and acpmux lowercases both
  _meta.acpmux.workspaceId and the env value (session_env.rs:158,167). So lane.workspaceID
  and WorkspaceModel.id are the same space and workspace(id:) is an exact dictionary hit. A
  pre-registry daemon gives id = "handle:<n>" with key == nil, which simply misses and keeps
  the old focused-pane behaviour.
• The pane waiter does fire for an already-open window. WindowController.show(_:on:) calls
  contentDidAppear(self) unconditionally at its end (:277), not only for a window's first
  content, and reveal(workspaceID:) only calls select(…), so the path really does go through
  afterNextContent. The wait captures neither self nor the WindowController, so it cannot
  retain a closed window, and it has no re-arm loop.
• View-change permission survives the wait. ActionRunScope.current is a @TaskLocal,
  afterNextContent binds it synchronously through carrying, and Task {} inherits task-locals.
• Isolation is right. uiSwiftSettings sets .defaultIsolation(MainActor.self), so
  AgentChatJump is MainActor-inferred and decide's non-@Sendable closure legally inherits it.
  MachineReconnectRoute is the same declaration shape, tested the same way.

Gates it ran on Linux: check-concurrency.sh, check-motion.sh, check-no-godfiles.sh and
lint-ios-package-conventions.sh all clean.

Follow-ups it raised, none blocking, for their own PR

1. AgentActivityPageService.swift:55,70 uses WindowActivation.Intent.raise without
   import CmuxNextDesign. Legal today (implicit-member lookup, MemberImportVisibility off) but
   it is the only file in CmuxNextApp that does so.
2. :97 — the .open body re-looks-up the window's focusedPane without re-asserting the window
   still shows workspaceID. The emit→body gap is a main-actor suspension, so a switch landing in
   between would open the chat in the wrong workspace's pane.
3. :49 — noteJump() runs before a wait that can exceed LocationTrailService.jumpWindow (2 s),
   so a slow-mounting workspace loses its dedicated Back step, and it stays armed for 2 s when the
   jump is refused. Calling it immediately before each actual open would be exact.
4. :74 — if content never appears, that path neither opens nor refuses, where the old path always
   ended in a tab or noPane. Also, contentDidAppear drops all of a window's waiters and runs
   only the matching one, so two rapid picks of different workspaces can drop the second.
5. :67-70 — showJumpWindow runs before it is known the window will show the workspace. Not
   reachable from the one caller (the sidebar gesture, where ActionRunScope.current is nil) and it
   matches DeepLinkNavigator.reveal(workspace:)'s existing shape.
6. Untested, because both need AppServices: that jump(to:) actually calls noteJump(), and that
   the generation guard suppresses a stale mount.

Two notes on the gates themselves

crash_ratchet.py reports CmuxNextApp dynamic_dispatch 3 -> 4, but that class is
NSSelectorFromString / Selector("…") / KVC-by-key and the added lines contain none of those; the
same run also reports deltas in MessagesLabHome and two cmux-tui-core files this PR does not
touch, so the baseline is stale on base.

scripts/cmux-next/prepush-gate.py crashes before running any check when given a ref with a slash:
it writes <rev>.reserved.json with rev="origin/feat-cmux-next", and the / makes a missing
directory. Unrelated to this PR, worth its own fix.

🤖 Generated with Claude Code

[github-actions]

The feat-cmux-next push run https://github.com/manaflow-ai/cmux/actions/runs/39787368484 at 3b9c520 failed: cmux-next fast tier.
Those jobs last passed at 73201a4. This pull request is one of 2 merged since: #23926, #24114.
If the failure is in your change, fix forward on feat-cmux-next. Pull requests run only the tiers their paths reach (docs/ci/cmux-next-tiers.md); label a batch PR full-ci to run them all before merging.

[github-actions]

The feat-cmux-next push run https://github.com/manaflow-ai/cmux/actions/runs/39788190928 at 0105692 failed: cmux-next fast tier.
Those jobs last passed at c04ccb2. This pull request is one of 2 merged since: #23926, #24114.
If the failure is in your change, fix forward on feat-cmux-next. Pull requests run only the tiers their paths reach (docs/ci/cmux-next-tiers.md); label a batch PR full-ci to run them all before merging.

[github-actions]

The feat-cmux-next push run https://github.com/manaflow-ai/cmux/actions/runs/39788910738 at e70f2c3 failed: cmux-next fast tier.
Those jobs last passed at c04ccb2. This pull request is one of 4 merged since: #23926, #24114, #24347, #24006.
If the failure is in your change, fix forward on feat-cmux-next. Pull requests run only the tiers their paths reach (docs/ci/cmux-next-tiers.md); label a batch PR full-ci to run them all before merging.

[github-actions]

Shipped in:

• cmux NEXT nightly 1.0.0-nightly.3991367032401 (b9c3d5aabc)
• cmux NEXT nightly 1.0.0-nightly.3991575404801 (a62351daaa)

[github-actions]

Shipped in:

• cmux NEXT nightly 1.0.0-nightly.3991503232101 (cd84bc62d1)