diff --git a/.github/workflows/integration.yml b/.github/workflows/integration.yml
index 05935bd..b409c9b 100644
--- a/.github/workflows/integration.yml
+++ b/.github/workflows/integration.yml
@@ -17,9 +17,6 @@ jobs:
       - uses: actions/checkout@v6
 
       - uses: ruby/setup-ruby@v1
-        with:
-          bundler-cache: true
-
       - name: Create test Rails app
         run: |
           gem install rails --no-document
@@ -43,7 +40,9 @@ jobs:
 
       - name: Pin outdated packages
         run: |
-          cat >> /tmp/test-app/config/importmap.rb << 'EOF'
+          cd /tmp/test-app
+
+          cat >> config/importmap.rb << 'EOF'
 
           pin "is-svg",     to: "https://cdn.jsdelivr.net/npm/is-svg@3.0.0/index.js"
           pin "md5",        to: "https://cdn.jsdelivr.net/npm/md5@2.2.0/dist/md5.min.js"
@@ -53,6 +52,9 @@ jobs:
           pin "just-extend", to: "https://cdn.jsdelivr.net/npm/just-extend@5.1.1/index.mjs"
           EOF
 
+          git add .
+          git commit -m "Pin outdated packages"
+
       - name: Run in dry-run mode
         uses: ./
         env:
diff --git a/action.yml b/action.yml
index 7c9498a..833a65a 100644
--- a/action.yml
+++ b/action.yml
@@ -35,11 +35,18 @@ inputs:
   rails-root:
     description: "Directory containing the Rails app to run against. Useful when the app lives in a subdirectory or for integration testing."
     required: false
-    default: "."
+    default: "${{ github.workspace }}"
 
 runs:
   using: "composite"
   steps:
+    - name: Save importmap outputs
+      shell: bash
+      working-directory: ${{ inputs.rails-root }}
+      run: |
+        bin/importmap audit 2>&1 | tee /tmp/importmap-audit.txt || true
+        bin/importmap outdated 2>&1 | tee /tmp/importmap-outdated.txt || true
+
     - name: Run importmap-update
       shell: bash
       working-directory: ${{ github.action_path }}
@@ -55,4 +62,7 @@ runs:
         IMPORTMAP_AUTHOR_EMAIL:   ${{ inputs.author-email }}
       run: |
         bundle install
-        bundle exec exe/importmap-update 2>&1 | tee "${IMPORTMAP_RUN_LOG:-/dev/null}"
+        bundle exec exe/importmap-update \
+          --outdated-file /tmp/importmap-outdated.txt \
+          --audit-file /tmp/importmap-audit.txt \
+          2>&1 | tee "${IMPORTMAP_RUN_LOG:-/dev/null}"
diff --git a/exe/importmap-update b/exe/importmap-update
index 6a2d151..5e434db 100755
--- a/exe/importmap-update
+++ b/exe/importmap-update
@@ -79,7 +79,7 @@ def require_files!(opts, *keys)
   exit 2
 end
 
-def build_plan_from_files(opts, config)
+def build_plan(opts, config)
   outdated_output = File.read(opts[:outdated_file])
   audit_output = File.read(opts[:audit_file])
   outdated = Importmap::Update::Parsers::OutdatedParser.parse(outdated_output)
@@ -89,16 +89,6 @@ def build_plan_from_files(opts, config)
   ).call
 end
 
-def build_plan_from_live(config, runner)
-  outdated_result = runner.run("bin/importmap", "outdated")
-  audit_result = runner.run("bin/importmap", "audit")
-  outdated = Importmap::Update::Parsers::OutdatedParser.parse(outdated_result.stdout)
-  vulnerabilities = Importmap::Update::Parsers::AuditParser.parse(audit_result.stdout)
-  Importmap::Update::Planner.new(
-    outdated: outdated, vulnerabilities: vulnerabilities, config: config
-  ).call
-end
-
 def load_existing_prs_from_file(path)
   return [] if path.nil? || !File.exist?(path)
   raw = YAML.safe_load_file(path, permitted_classes: [], aliases: false) || []
@@ -117,7 +107,7 @@ when :print_config
 
 when :print_plan
   require_files!(options, :outdated_file, :audit_file)
-  plan = build_plan_from_files(options, config)
+  plan = build_plan(options, config)
   puts({
     "pr_specs" => plan.pr_specs.map { |s|
       {
@@ -134,7 +124,7 @@ when :print_plan
 
 when :print_actions
   require_files!(options, :outdated_file, :audit_file)
-  plan = build_plan_from_files(options, config)
+  plan = build_plan(options, config)
   existing_prs = load_existing_prs_from_file(options[:existing_prs_file])
   result = Importmap::Update::Reconciler.new(plan: plan, existing_prs: existing_prs).call
   puts({
@@ -151,6 +141,8 @@ when :print_actions
   }.to_yaml)
 
 when :run
+  require_files!(options, :outdated_file, :audit_file)
+
   repo = ENV["GITHUB_REPOSITORY"]
   if repo.nil? || repo.empty?
     warn "GITHUB_REPOSITORY is not set; refusing to run."
@@ -172,7 +164,7 @@ when :run
     author_email: ENV.fetch("IMPORTMAP_AUTHOR_EMAIL", "github-actions[bot]@users.noreply.github.com")
   )
 
-  plan = build_plan_from_live(config, runner)
+  plan = build_plan(options, config)
   existing_prs = gh.list_open_prs(branch_prefix: config.branch_prefix)
   reconciled = Importmap::Update::Reconciler.new(plan: plan, existing_prs: existing_prs).call