diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 030d47ea7..059efac4d 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -25,6 +25,8 @@ jobs:
           key: pre-commit|${{ env.PY }}|${{ hashFiles('.pre-commit-config.yaml') }}
       - name: Run pre-commit
         run: pre-commit run --all-files
+      - name: Run manual pre-commit hooks
+        run: pre-commit run --all-files --hook-stage manual
   ls-lint:
     name: Run ls-lint
     runs-on: ubuntu-latest
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 194739dea..386d651cd 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -24,12 +24,21 @@ repos:
         files: \.(json|md|ya?ml)$
         language: node
         additional_dependencies: ["prettier@3.6.2"]
+        stages: [manual]
   - repo: https://github.com/gitleaks/gitleaks
     rev: v8.28.0
     hooks:
       - id: gitleaks
         name: run gitleaks
         description: detect hardcoded secrets with gitleaks
+  - repo: https://github.com/oxipng/oxipng
+    rev: v9.1.5
+    hooks:
+      - id: oxipng
+        name: run oxipng
+        description: use lossless compression to optimize PNG files
+        args: ["--fix", "-o", "4", "--strip", "safe", "--alpha"]
+        stages: [manual]
   - repo: https://github.com/pre-commit/pre-commit-hooks
     rev: v6.0.0
     hooks:
@@ -97,6 +106,7 @@ repos:
         name: run markdown-link-check
         description: checks hyperlinks in Markdown files
         args: [--config=.github/linters/mlc_config.json, -q]
+        stages: [manual]
         types: [markdown]
         files: \.md$
   - repo: https://github.com/rubocop/rubocop