Deep composite action tree for testing runner action resolution batching

Action graph (8 unique actions, depth 3):
  workflow → leaf-echo, composite-a, composite-b, composite-c
  composite-a → leaf-echo, leaf-sleep, composite-d
  composite-b → leaf-echo, leaf-sleep, composite-e
  composite-c → leaf-echo, composite-d, composite-e
  composite-d → leaf-echo, leaf-sleep, composite-f
  composite-e → leaf-echo, leaf-sleep, composite-f
  composite-f → leaf-echo, leaf-sleep

Without batching: ~15-20 resolve API calls (one per composite per depth)
With actions/runner#4296: ~3-4 calls (one batch per depth level)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: stefanpenner

.github/workflows/deep-composite-test.yml

@@ -0,0 +1,28 @@
+name: Deep Composite Resolution Test
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [main]
+
+jobs:
+  resolve-storm:
+    runs-on: ubuntu-latest
+    steps:
+      # 3 top-level composites + 1 leaf = depth 0 has 4 actions
+      # Each composite fans out into 2-3 sub-actions per depth level
+      # Total unique actions: 8 (leaf-echo, leaf-sleep, composite-a..f)
+      # Without batching/dedup: ~15-20 resolve API calls
+      # With PR #4296: ~3-4 resolve API calls
+      - uses: actions/checkout@v4
+
+      - uses: stefanpenner/resolution-test/leaf-echo@main
+        with:
+          message: 'top-level leaf-echo'
+
+      - uses: stefanpenner/resolution-test/composite-a@main
+      - uses: stefanpenner/resolution-test/composite-b@main
+      - uses: stefanpenner/resolution-test/composite-c@main
+
+      - run: echo "All composites resolved and executed successfully"
+        shell: bash

composite-a/action.yml

@@ -0,0 +1,10 @@
+name: 'Composite A'
+description: 'Depth-1 composite'
+runs:
+  using: 'composite'
+  steps:
+    - uses: stefanpenner/resolution-test/leaf-echo@main
+      with:
+        message: 'from composite-a (depth 1)'
+    - uses: stefanpenner/resolution-test/leaf-sleep@main
+    - uses: stefanpenner/resolution-test/composite-d@main

composite-b/action.yml

@@ -0,0 +1,10 @@
+name: 'Composite B'
+description: 'Depth-1 composite'
+runs:
+  using: 'composite'
+  steps:
+    - uses: stefanpenner/resolution-test/leaf-echo@main
+      with:
+        message: 'from composite-b (depth 1)'
+    - uses: stefanpenner/resolution-test/leaf-sleep@main
+    - uses: stefanpenner/resolution-test/composite-e@main

composite-c/action.yml

@@ -0,0 +1,10 @@
+name: 'Composite C'
+description: 'Depth-1 composite'
+runs:
+  using: 'composite'
+  steps:
+    - uses: stefanpenner/resolution-test/leaf-echo@main
+      with:
+        message: 'from composite-c (depth 1)'
+    - uses: stefanpenner/resolution-test/composite-d@main
+    - uses: stefanpenner/resolution-test/composite-e@main

composite-d/action.yml

@@ -0,0 +1,10 @@
+name: 'Composite D'
+description: 'Depth-2 composite'
+runs:
+  using: 'composite'
+  steps:
+    - uses: stefanpenner/resolution-test/leaf-echo@main
+      with:
+        message: 'from composite-d (depth 2)'
+    - uses: stefanpenner/resolution-test/leaf-sleep@main
+    - uses: stefanpenner/resolution-test/composite-f@main

composite-e/action.yml

@@ -0,0 +1,10 @@
+name: 'Composite E'
+description: 'Depth-2 composite'
+runs:
+  using: 'composite'
+  steps:
+    - uses: stefanpenner/resolution-test/leaf-echo@main
+      with:
+        message: 'from composite-e (depth 2)'
+    - uses: stefanpenner/resolution-test/leaf-sleep@main
+    - uses: stefanpenner/resolution-test/composite-f@main

composite-f/action.yml

@@ -0,0 +1,9 @@
+name: 'Composite F'
+description: 'Depth-3 composite'
+runs:
+  using: 'composite'
+  steps:
+    - uses: stefanpenner/resolution-test/leaf-echo@main
+      with:
+        message: 'from composite-f (depth 3)'
+    - uses: stefanpenner/resolution-test/leaf-sleep@main

leaf-echo/action.yml

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+name: 'Leaf Echo'
+description: 'Simple echo action used at many depths'
+inputs:
+  message:
+    description: 'Message to echo'
+    default: 'hello from leaf-echo'
+runs:
+  using: 'composite'
+  steps:
+    - run: echo "${{ inputs.message }}"
+      shell: bash

leaf-sleep/action.yml

@@ -0,0 +1,7 @@
+name: 'Leaf Sleep'
+description: 'Trivial action that sleeps briefly'
+runs:
+  using: 'composite'
+  steps:
+    - run: echo "leaf-sleep start" && echo "leaf-sleep done"
+      shell: bash