diff --git a/.github/workflows/code-quality.yml b/.github/workflows/code-quality.yml
index 9490b17..72cf7d3 100644
--- a/.github/workflows/code-quality.yml
+++ b/.github/workflows/code-quality.yml
@@ -77,7 +77,7 @@ jobs:
       - name: Set up Node.js
         uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020  # v4
         with:
-          node-version: '20'
+          node-version: '24'
 
       - name: markdownlint
         # Lints top-level guides (README, AGENTS, ARCHITECTURE, CLAUDE, per-harness
diff --git a/.github/workflows/validate.yml b/.github/workflows/validate.yml
index d719204..8da35e9 100644
--- a/.github/workflows/validate.yml
+++ b/.github/workflows/validate.yml
@@ -230,7 +230,7 @@ jobs:
       - name: Set up Node.js (for Gemini CLI)
         uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020  # v4
         with:
-          node-version: '20'
+          node-version: '24'
 
       - name: Set up Bun (for OpenCode CLI)
         uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6  # v2