hf skills post with codex training llms (#3224)

* add blog post on hf skills

* add to index

* add thumbnail

* Apply suggestions from code review

Co-authored-by: Pedro Cuenca <[email protected]>
Co-authored-by: Merve Noyan <[email protected]>

* fix typo in thumbnail

* Update hf-skills-training-codex.md

Co-authored-by: Pedro Cuenca <[email protected]>

* update tip

* lose tip for hf mcp setup

* we don't update the report

* drop sentence about skill

* move codeforces tip

* Update hf-skills-training-codex.md

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Co-authored-by: Pedro Cuenca <[email protected]>
Co-authored-by: Merve Noyan <[email protected]>

Author: 3 people

_blog.yml

@@ -4981,3 +4981,15 @@
     - open-source
     - community
 
+- local: hf-skills-training-codex
+  date: Dec 11, 2025
+  tags:
+    - llm
+    - fine-tuning
+    - open-source
+    - community
+    - training
+    - Claude
+    - Codex
+    - Gemini
+    - agents