Changelog for v0.31.0 (#20634)

Co-authored-by: gemini-cli-robot <224641728+gemini-cli-robot@users.noreply.github.com>

docs/changelogs/index.md

@@ -18,6 +18,27 @@ on GitHub.
 | [Preview](preview.md) | Experimental features ready for early feedback. |
 | [Stable](latest.md)   | Stable, recommended for general use.            |
 
+## Announcements: v0.31.0 - 2026-02-27
+
+- **Gemini 3.1 Pro Preview:** Gemini CLI now supports the new Gemini 3.1 Pro
+  Preview model
+  ([#19676](https://github.com/google-gemini/gemini-cli/pull/19676) by
+  @sehoon38).
+- **Experimental Browser Agent:** We've introduced a new experimental browser
+  agent to interact with web pages
+  ([#19284](https://github.com/google-gemini/gemini-cli/pull/19284) by
+  @gsquared94).
+- **Policy Engine Updates:** The policy engine now supports project-level
+  policies, MCP server wildcards, and tool annotation matching
+  ([#18682](https://github.com/google-gemini/gemini-cli/pull/18682) by
+  @Abhijit-2592,
+  [#20024](https://github.com/google-gemini/gemini-cli/pull/20024) by @jerop).
+- **Web Fetch Improvements:** We've implemented an experimental direct web fetch
+  feature and added rate limiting to mitigate DDoS risks
+  ([#19557](https://github.com/google-gemini/gemini-cli/pull/19557) by @mbleigh,
+  [#19567](https://github.com/google-gemini/gemini-cli/pull/19567) by
+  @mattKorwel).
+
 ## Announcements: v0.30.0 - 2026-02-25
 
 - **SDK & Custom Skills:** Introduced the initial SDK package, enabling dynamic