feat: Replace fixed-width box output with status spine format

.github/workflows/js.yml

@@ -161,13 +161,13 @@ jobs:
         with:
           bun-version: latest
 
-      - name: Install screen (Linux)
+      - name: Install screen and tmux (Linux)
         if: runner.os == 'Linux'
-        run: sudo apt-get update && sudo apt-get install -y screen
+        run: sudo apt-get update && sudo apt-get install -y screen tmux
 
-      - name: Install screen (macOS)
+      - name: Install screen and tmux (macOS)
         if: runner.os == 'macOS'
-        run: brew install screen
+        run: brew install screen tmux
 
       - name: Setup .NET for clink (Linux)
         if: runner.os == 'Linux'
@@ -247,6 +247,28 @@ jobs:
           cat "$USERPROFILE/.start-command/executions.lino"
           echo "Execution tracking test passed"
 
+      # Integration tests for isolation modes - Linux only
+      - name: Test screen isolation mode (Linux)
+        if: runner.os == 'Linux'
+        working-directory: js
+        run: |
+          bun run src/bin/cli.js --isolated screen -- echo "Testing screen isolation"
+          echo "Screen isolation test passed"
+
+      - name: Test tmux isolation mode (Linux)
+        if: runner.os == 'Linux'
+        working-directory: js
+        run: |
+          bun run src/bin/cli.js --isolated tmux -d -- echo "Testing tmux isolation"
+          echo "Tmux isolation test passed"
+
+      - name: Test docker isolation mode (Linux)
+        if: runner.os == 'Linux'
+        working-directory: js
+        run: |
+          bun run src/bin/cli.js --isolated docker -d --image alpine:latest -- echo "Testing docker isolation"
+          echo "Docker isolation test passed"
+
       # SSH Integration Tests - Linux only
       - name: Setup SSH server for integration tests (Linux)
         if: runner.os == 'Linux'

.github/workflows/rust.yml

@@ -83,20 +83,25 @@ jobs:
 
       - name: Check for changelog fragments
         run: |
-          # Get list of fragment files (excluding README and template)
-          FRAGMENTS=$(find rust/changelog.d -name "*.md" ! -name "README.md" 2>/dev/null | wc -l)
-
           # Get changed files in PR
           CHANGED_FILES=$(git diff --name-only origin/${{ github.base_ref }}...HEAD)
 
           # Check if any Rust source files changed
           SOURCE_CHANGED=$(echo "$CHANGED_FILES" | grep -E "^rust/(src/|tests/|Cargo\.toml)" | wc -l)
 
-          if [ "$SOURCE_CHANGED" -gt 0 ] && [ "$FRAGMENTS" -eq 0 ]; then
-            echo "::error::No changelog fragment found. Please add a changelog entry in rust/changelog.d/"
+          # Check if a changelog fragment was ADDED in this PR (not just existing)
+          # We need to check the diff, not just the directory contents
+          FRAGMENT_ADDED=$(echo "$CHANGED_FILES" | grep -E "^rust/changelog\.d/.*\.md$" | grep -v "README.md" | wc -l)
+
+          echo "Source files changed: $SOURCE_CHANGED"
+          echo "Changelog fragments added in PR: $FRAGMENT_ADDED"
+
+          if [ "$SOURCE_CHANGED" -gt 0 ] && [ "$FRAGMENT_ADDED" -eq 0 ]; then
+            echo "::error::No changelog fragment found in this PR. Please add a changelog entry in rust/changelog.d/"
             echo ""
             echo "To create a changelog fragment:"
             echo "  Create a new .md file in rust/changelog.d/ with your changes"
+            echo "  Name it after your PR number, e.g., '123.md'"
             echo ""
             echo "See rust/changelog.d/README.md for more information."
             exit 1
@@ -218,11 +223,12 @@ jobs:
           echo "Execution tracking test passed"
 
   # === BUILD ===
+  # Only build on push to main, not on PRs (tests already verify the code builds)
   build:
     name: Build Package
     runs-on: ubuntu-latest
     needs: [lint, test]
-    if: always() && needs.lint.result == 'success' && needs.test.result == 'success'
+    if: always() && github.event_name == 'push' && needs.lint.result == 'success' && needs.test.result == 'success'
     steps:
       - uses: actions/checkout@v4
 

js/.changeset/status-spine-format.md

@@ -0,0 +1,12 @@
+---
+'start-command': minor
+---
+
+Replace fixed-width box output with status spine format
+
+- Width-independent output that doesn't truncate or create jagged boxes
+- All metadata visible and copy-pasteable (log paths, session IDs)
+- Works uniformly in TTY, tmux, SSH, CI, and log files
+- Clear visual distinction: │ for metadata, $ for command, no prefix for output
+- Result markers ✓ and ✗ for success/failure
+- Isolation metadata repeated in footer for context

js/src/bin/cli.js

@@ -623,7 +623,7 @@ async function runWithIsolation(
     console.log('');
   }
 
-  // Print finish block with result message inside
+  // Print finish block with isolation metadata repeated
   // Add empty line before finish block for visual separation
   console.log('');
   const durationMs = Date.now() - startTimeMs;
@@ -634,7 +634,7 @@ async function runWithIsolation(
       exitCode,
       logPath: logFilePath,
       durationMs,
-      resultMessage: result.message,
+      extraLines, // Pass extraLines for isolation metadata repetition in footer
     })
   );