Docs: Update release notes for 1/13/2026 (#16583)

Co-authored-by: Tommaso Sciortino <sciortino@gmail.com>

docs/changelogs/index.md

@@ -18,6 +18,31 @@ on GitHub.
 | [Preview](preview.md) | Experimental features ready for early feedback. |
 | [Stable](latest.md)   | Stable, recommended for general use.            |
 
+## Announcements: v0.23.0 - 2026-01-07
+
+- 🎉 **Experimental Agent Skills Support in Preview:** Gemini CLI now supports
+  [Agent Skills](https://agentskills.io/home) in our preview builds. This is an
+  early preview where we’re looking for feedback!
+  - Install Preview: `npm install -g @google/gemini-cli@preview`
+  - Enable in `/settings`
+  - Docs:
+    [https://geminicli.com/docs/cli/skills/](https://geminicli.com/docs/cli/skills/)
+- **Gemini CLI wrapped:** Run `npx gemini-wrapped` to visualize your usage
+  stats, top models, languages, and more!
+- **Windows clipboard image support:** Windows users can now paste images
+  directly from their clipboard into the CLI using `Alt`+`V`.
+  ([pr](https://github.com/google-gemini/gemini-cli/pull/13997) by
+  [@sgeraldes](https://github.com/sgeraldes))
+- **Terminal background color detection:** Automatically optimizes your
+  terminal's background color to select compatible themes and provide
+  accessibility warnings.
+  ([pr](https://github.com/google-gemini/gemini-cli/pull/15132) by
+  [@jacob314](https://github.com/jacob314))
+- **Session logout:** Use the new `/logout` command to instantly clear
+  credentials and reset your authentication state for seamless account
+  switching. ([pr](https://github.com/google-gemini/gemini-cli/pull/13383) by
+  [@CN-Scars](https://github.com/CN-Scars))
+
 ## Announcements: v0.22.0 - 2025-12-22
 
 - 🎉**Free Tier + Gemini 3:** Free tier users now all have access to Gemini 3