diff --git a/.codex/skills/code-review-breaking-changes/SKILL.md b/.codex/skills/code-review-breaking-changes/SKILL.md
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+---
+name: code-breaking-changes
+description: Breacking 
+---
+
+Search for breaking changes in external integration surfaces:
+- app-server APIs
+- CLI parameters
+- configuration loading
+- resuming sessions from existing rollouts
+
+
+Do not stop  after finding one issue, analyze all possible ways breaking changes can happen.
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diff --git a/.codex/skills/code-review-change-size/SKILL.md b/.codex/skills/code-review-change-size/SKILL.md
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+---
+name: code-review-change-size
+description: Change size guidance (800 lines)
+---
+
+Unless the change is mechanical the total number of changed lines should not exceed 800 lines.
+For complex logic changes the size should be under 500 lines.
+
+If the change is larger consider how the change can be done in stages. This must be well informed and reasearch ed suggestion. 
+Optimize for the ease of review, group mechanical changes separately from complex logic changes.
diff --git a/.codex/skills/code-review-testing/SKILL.md b/.codex/skills/code-review-testing/SKILL.md
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+---
+name: code-review-testing
+description: Test authoring guidance
+---
+
+For agent changes prefer integration tests over unit tests. Integration tests are under `core/suite` and use `test_codex` to set up a test instance of codex.
+
+Features change change the agent logic MUST add an integration test:
+- Provide a list of major logic changes and user-facing behaviors that need to be tested.
+
+Check whether there are existing helpers to make tests more streamlined and readable.
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diff --git a/.codex/skills/code-review/SKILL.md b/.codex/skills/code-review/SKILL.md
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+---
+name: code-review
+description: Run a final code review on a pull request
+---
+
+Use subagents to review code using all code-review-* skills in this repository. One subagent per skill. Pass full skill path to subagents. Use xhigh reasoning.
+
+You can return an unlimited number of findings. 
+Use raw Markdown to report findings.
+Number findings for the ease of reference.
+
+If the GitHub user running the review is the owner of the pull request add a `code-reviewed` label.
+Do not leave GitHub comments unless explicitly asked.
+