🤖 feat: complete the Mux to Xum rename

.design-sync/conventions.md

@@ -1,4 +1,4 @@
-# Mux design system — how to build with it
+# Xum design system — how to build with it
 
 These components are Mux's real, compiled React components (the desktop app's UI:
 chat tool-call cards, message states, settings sections, banners, modals, small
@@ -30,14 +30,14 @@ There are **no CSS-module class maps**; style layout with Tailwind utility class
 built from Mux's semantic color tokens (NOT raw hex). Real families (all in the
 shipped stylesheet):
 
-| Purpose     | Utilities                                                                                    |
-| ----------- | -------------------------------------------------------------------------------------------- |
-| Surfaces    | `bg-background`, `bg-background-secondary`, `bg-surface-primary`, `bg-surface-secondary`     |
-| Text        | `text-foreground`, `text-muted-foreground`, `text-content-primary`, `text-content-secondary` |
-| Borders     | `border-border`                                                                              |
-| Accent      | `bg-accent`, `text-accent`                                                                   |
+| Purpose     | Utilities                                                                                                                                                                                                    |
+| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
+| Surfaces    | `bg-background`, `bg-background-secondary`, `bg-surface-primary`, `bg-surface-secondary`                                                                                                                     |
+| Text        | `text-foreground`, `text-muted-foreground`, `text-content-primary`, `text-content-secondary`                                                                                                                 |
+| Borders     | `border-border`                                                                                                                                                                                              |
+| Accent      | `bg-accent`, `text-accent`                                                                                                                                                                                   |
 | Agent modes | `text-plan-mode` / `bg-plan-mode` — same for `edit` / `exec` / `thinking` / `task`. `ask` & `debug` ship only as `--color-<mode>-mode` tokens (no utility): use `style={{ color: "var(--color-ask-mode)" }}` |
-| Radius      | `rounded-md`                                                                                 |
+| Radius      | `rounded-md`                                                                                                                                                                                                 |
 
 For a token Tailwind doesn't expose as a utility, reference it directly:
 `style={{ color: "var(--color-content-primary)" }}`. Token names live in the

.design-sync/previews/PRLinkBadge.tsx

@@ -8,7 +8,7 @@ import type { GitHubPRLinkWithStatus } from "@/common/types/links";
 // PRLinkBadge only needs theme + tooltip from the shell.
 const PR_LINK: GitHubPRLinkWithStatus = {
   type: "github-pr",
-  url: "https://github.com/coder/mux/pull/1623",
+  url: "https://github.com/coder/xum/pull/1623",
   owner: "coder",
   repo: "mux",
   number: 1623,

.envrc

@@ -8,9 +8,13 @@ nix_direnv_manual_reload
 
 use flake .
 
-# Optional: shared per-user env vars for all mux worktrees
-MUX_SHARED_ENVRC="$HOME/.mux/.envrc"
-if [[ -f "$MUX_SHARED_ENVRC" ]]; then
+# Optional: shared per-user env vars for all Xum worktrees.
+XUM_SHARED_ENVRC="$HOME/.xum/.envrc"
+LEGACY_MUX_SHARED_ENVRC="$HOME/.mux/.envrc"
+if [[ -f "$XUM_SHARED_ENVRC" ]]; then
   # source_env() also calls watch_file(), so edits trigger direnv reloads.
-  source_env "$MUX_SHARED_ENVRC"
+  source_env "$XUM_SHARED_ENVRC"
+elif [[ -f "$LEGACY_MUX_SHARED_ENVRC" ]]; then
+  # Existing developer machines may not have moved their shared env file yet.
+  source_env "$LEGACY_MUX_SHARED_ENVRC"
 fi

.github/workflows/nightly-terminal-bench.yml

@@ -18,8 +18,13 @@ on:
         description: "Experiments to enable (comma-separated)"
         required: false
         type: string
+      xum_run_as_goal:
+        description: "Run nightly smoke/matrix tasks as strict Xum CLI Goal Runs"
+        required: false
+        default: false
+        type: boolean
       mux_run_as_goal:
-        description: "Run nightly smoke/matrix tasks as strict mux CLI Goal Runs"
+        description: "Deprecated alias for xum_run_as_goal"
         required: false
         default: false
         type: boolean
@@ -32,13 +37,13 @@ jobs:
     uses: ./.github/workflows/terminal-bench.yml
     with:
       model_name: "anthropic/claude-sonnet-4-5"
-      mux_run_args: "--thinking high"
+      xum_run_args: "--thinking high"
       dataset: "terminal-bench@2.0"
       concurrency: "1"
       env: "daytona"
       task_names: "chess-best-move"
       experiments: ${{ inputs.experiments }}
-      mux_run_as_goal: ${{ github.event_name == 'workflow_dispatch' && inputs.mux_run_as_goal || false }}
+      xum_run_as_goal: ${{ github.event_name == 'workflow_dispatch' && (inputs.xum_run_as_goal || inputs.mux_run_as_goal) || false }}
     # Keep least-privilege secret scope for reusable workflow calls.
     secrets:
       TERMINAL_BENCH_ANTHROPIC_API_KEY: ${{ secrets.TERMINAL_BENCH_ANTHROPIC_API_KEY }}
@@ -48,23 +53,23 @@ jobs:
       GCP_SA_KEY: ${{ secrets.GCP_SA_KEY }}
 
   # Smoke tests for Harbor SWE-style datasets (single task each).
-  # These validate that mux can run inside the dataset's repo checkout (--runtime local)
-  # and that we target the verifier's expected working directory (MUX_PROJECT_PATH).
+  # These validate that Xum can run inside the dataset's repo checkout (--runtime local)
+  # and that we target the verifier's expected working directory (XUM_PROJECT_PATH).
   swebench-verified-smoke-test:
     name: "Smoke test (swebench-verified: django__django-10097)"
     needs: smoke-test
     uses: ./.github/workflows/terminal-bench.yml
     with:
       model_name: "anthropic/claude-sonnet-4-5"
-      mux_run_args: "--thinking high --runtime local"
+      xum_run_args: "--thinking high --runtime local"
       dataset: "swebench-verified@1.0"
       concurrency: "1"
       env: "daytona"
       task_names: "django__django-10097"
-      mux_project_path: "/testbed"
+      xum_project_path: "/testbed"
       timeout: "3000"
       experiments: ${{ inputs.experiments }}
-      mux_run_as_goal: ${{ github.event_name == 'workflow_dispatch' && inputs.mux_run_as_goal || false }}
+      xum_run_as_goal: ${{ github.event_name == 'workflow_dispatch' && (inputs.xum_run_as_goal || inputs.mux_run_as_goal) || false }}
     secrets:
       TERMINAL_BENCH_ANTHROPIC_API_KEY: ${{ secrets.TERMINAL_BENCH_ANTHROPIC_API_KEY }}
       OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
@@ -78,15 +83,15 @@ jobs:
     uses: ./.github/workflows/terminal-bench.yml
     with:
       model_name: "anthropic/claude-sonnet-4-5"
-      mux_run_args: "--thinking high --runtime local"
+      xum_run_args: "--thinking high --runtime local"
       dataset: "swe-gen-js@1.0"
       concurrency: "1"
       env: "daytona"
       task_names: "biomejs__biome-7314"
-      mux_project_path: "/app/src"
+      xum_project_path: "/app/src"
       timeout: "600"
       experiments: ${{ inputs.experiments }}
-      mux_run_as_goal: ${{ github.event_name == 'workflow_dispatch' && inputs.mux_run_as_goal || false }}
+      xum_run_as_goal: ${{ github.event_name == 'workflow_dispatch' && (inputs.xum_run_as_goal || inputs.mux_run_as_goal) || false }}
     secrets:
       TERMINAL_BENCH_ANTHROPIC_API_KEY: ${{ secrets.TERMINAL_BENCH_ANTHROPIC_API_KEY }}
       OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
@@ -100,15 +105,15 @@ jobs:
     uses: ./.github/workflows/terminal-bench.yml
     with:
       model_name: "anthropic/claude-sonnet-4-5"
-      mux_run_args: "--thinking high --runtime local"
+      xum_run_args: "--thinking high --runtime local"
       dataset: "aider-polyglot@1.0"
       concurrency: "1"
       env: "daytona"
       task_names: "polyglot_cpp_all-your-base"
-      mux_project_path: "/app"
+      xum_project_path: "/app"
       timeout: "1800"
       experiments: ${{ inputs.experiments }}
-      mux_run_as_goal: ${{ github.event_name == 'workflow_dispatch' && inputs.mux_run_as_goal || false }}
+      xum_run_as_goal: ${{ github.event_name == 'workflow_dispatch' && (inputs.xum_run_as_goal || inputs.mux_run_as_goal) || false }}
     secrets:
       TERMINAL_BENCH_ANTHROPIC_API_KEY: ${{ secrets.TERMINAL_BENCH_ANTHROPIC_API_KEY }}
       OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
@@ -147,12 +152,12 @@ jobs:
     uses: ./.github/workflows/terminal-bench.yml
     with:
       model_name: ${{ matrix.model }}
-      mux_run_args: "--thinking high"
+      xum_run_args: "--thinking high"
       dataset: "terminal-bench@2.0"
       concurrency: "48"
       env: "daytona"
       experiments: ${{ inputs.experiments }}
-      mux_run_as_goal: ${{ github.event_name == 'workflow_dispatch' && inputs.mux_run_as_goal || false }}
+      xum_run_as_goal: ${{ github.event_name == 'workflow_dispatch' && (inputs.xum_run_as_goal || inputs.mux_run_as_goal) || false }}
       allow_transient_agent_errors: true
     secrets:
       TERMINAL_BENCH_ANTHROPIC_API_KEY: ${{ secrets.TERMINAL_BENCH_ANTHROPIC_API_KEY }}

.github/workflows/terminal-bench.yml

@@ -44,18 +44,34 @@ on:
         required: false
         type: string
         default: ""
-      mux_project_path:
+      xum_project_path:
         description: "Project path inside the task container (e.g., /testbed, /app/src)"
         required: false
         type: string
         default: ""
+      xum_run_args:
+        description: "Additional CLI flags passed to Xum run (e.g., --thinking high --use-1m --budget 5.00; with goal mode, add --goal-turns/--goal-budget)"
+        required: false
+        type: string
+        default: ""
+      xum_run_as_goal:
+        description: "Run each task instruction as a Xum CLI Goal Run"
+        required: false
+        type: boolean
+        default: false
+      # Compatibility inputs for reusable-workflow callers created before the rename.
+      mux_project_path:
+        description: "Deprecated alias for xum_project_path"
+        required: false
+        type: string
+        default: ""
       mux_run_args:
-        description: "Additional CLI flags passed to mux run (e.g., --thinking high --use-1m --budget 5.00; with goal mode, add --goal-turns/--goal-budget)"
+        description: "Deprecated alias for xum_run_args"
         required: false
         type: string
         default: ""
       mux_run_as_goal:
-        description: "Run each task instruction as a mux CLI Goal Run"
+        description: "Deprecated alias for xum_run_as_goal"
         required: false
         type: boolean
         default: false
@@ -101,12 +117,14 @@ on:
         description: "Model to use (e.g., anthropic/claude-opus-5, openai/gpt-5.6-sol)"
         required: false
         type: string
+      # GitHub caps workflow_dispatch at ten inputs. Keep these established
+      # external names while reusable workflow calls use canonical xum_* inputs.
       mux_run_args:
-        description: "Additional CLI flags passed to mux run (e.g., --thinking high --use-1m; with goal mode, add --goal-turns/--goal-budget)"
+        description: "Additional CLI flags passed to Xum run (legacy input name)"
         required: false
         type: string
       mux_run_as_goal:
-        description: "Run each task instruction as a mux CLI Goal Run"
+        description: "Run each task instruction as a Xum CLI Goal Run (legacy input name)"
         required: false
         default: false
         type: boolean
@@ -192,15 +210,15 @@ jobs:
           TB_ENV: ${{ inputs.env }}
           TB_TASK_NAMES: ${{ inputs.task_names }}
           TB_MODEL: ${{ inputs.model_name }}
-          MUX_MODEL: ${{ inputs.model_name }}
+          XUM_MODEL: ${{ inputs.model_name }}
           TB_TIMEOUT: ${{ inputs.timeout }}
-          MUX_PROJECT_PATH: ${{ inputs.mux_project_path }}
+          XUM_PROJECT_PATH: ${{ inputs.xum_project_path || inputs.mux_project_path }}
           TB_ARGS: >-
             ${{ inputs.max_tasks && format('--n-tasks {0}', inputs.max_tasks) || '' }}
             ${{ inputs.extra_args || '' }}
-          MUX_EXPERIMENTS: ${{ inputs.experiments }}
-          MUX_RUN_ARGS: ${{ inputs.mux_run_args }}
-          MUX_RUN_AS_GOAL: ${{ inputs.mux_run_as_goal && '1' || '' }}
+          XUM_EXPERIMENTS: ${{ inputs.experiments }}
+          XUM_RUN_ARGS: ${{ inputs.xum_run_args || inputs.mux_run_args }}
+          XUM_RUN_AS_GOAL: ${{ (inputs.xum_run_as_goal || inputs.mux_run_as_goal) && '1' || '' }}
           ANTHROPIC_API_KEY: ${{ secrets.TERMINAL_BENCH_ANTHROPIC_API_KEY }}
           OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
           GOOGLE_API_KEY: ${{ secrets.GOOGLE_API_KEY }}
@@ -280,13 +298,13 @@ jobs:
           echo "Artifact name: $ARTIFACT_NAME"
 
       - name: Upload Terminal-Bench results to BigQuery
-        if: always() && github.repository == 'coder/mux' && startsWith(inputs.dataset, 'terminal-bench@')
+        if: always() && github.repository == 'coder/xum' && startsWith(inputs.dataset, 'terminal-bench@')
         env:
           GCP_SA_KEY: ${{ secrets.GCP_SA_KEY }}
           GCP_PROJECT_ID: mux-benchmarks
           BQ_DATASET: benchmarks
-          MUX_EXPERIMENTS: ${{ inputs.experiments }}
-          MUX_RUN_AS_GOAL: ${{ inputs.mux_run_as_goal && '1' || '' }}
+          XUM_EXPERIMENTS: ${{ inputs.experiments }}
+          XUM_RUN_AS_GOAL: ${{ inputs.xum_run_as_goal && '1' || '' }}
         run: |
           if [ -z "$GCP_SA_KEY" ]; then
             echo "GCP_SA_KEY not set, skipping BigQuery upload"
@@ -299,13 +317,13 @@ jobs:
           rm -f /tmp/gcp-sa.json
 
       - name: Upload Harbor results to BigQuery
-        if: always() && github.repository == 'coder/mux' && !startsWith(inputs.dataset, 'terminal-bench@')
+        if: always() && github.repository == 'coder/xum' && !startsWith(inputs.dataset, 'terminal-bench@')
         env:
           GCP_SA_KEY: ${{ secrets.GCP_SA_KEY }}
           GCP_PROJECT_ID: mux-benchmarks
           BQ_DATASET: benchmarks
-          MUX_EXPERIMENTS: ${{ inputs.experiments }}
-          MUX_RUN_AS_GOAL: ${{ inputs.mux_run_as_goal && '1' || '' }}
+          XUM_EXPERIMENTS: ${{ inputs.experiments }}
+          XUM_RUN_AS_GOAL: ${{ inputs.xum_run_as_goal && '1' || '' }}
         run: |
           if [ -z "$GCP_SA_KEY" ]; then
             echo "GCP_SA_KEY not set, skipping BigQuery upload"