Docs: Update changelogs for v.0.25.0 and v0.26.0-preview.0 releases. (#17215)

docs/changelogs/index.md

@@ -18,6 +18,93 @@ on GitHub.
 | [Preview](preview.md) | Experimental features ready for early feedback. |
 | [Stable](latest.md)   | Stable, recommended for general use.            |
 
+## Announcements: v0.25.0 - 2026-01-20
+
+- **Skills and Agents Improvements:** We've enhanced the `activate_skill` tool,
+  added a new `pr-creator` skill
+  ([#16232](https://github.com/google-gemini/gemini-cli/pull/16232) by
+  [@NTaylorMullen](https://github.com/NTaylorMullen)), enabled skills by
+  default, improved the `cli_help` agent
+  ([#16100](https://github.com/google-gemini/gemini-cli/pull/16100) by
+  [@scidomino](https://github.com/scidomino)), and added a new `/agents refresh`
+  command ([#16204](https://github.com/google-gemini/gemini-cli/pull/16204) by
+  [@joshualitt](https://github.com/joshualitt)).
+- **UI/UX Refinements:** You'll notice more transparent feedback for skills
+  ([#15954](https://github.com/google-gemini/gemini-cli/pull/15954) by
+  [@NTaylorMullen](https://github.com/NTaylorMullen)), the ability to switch
+  focus between the shell and input with Tab
+  ([#14332](https://github.com/google-gemini/gemini-cli/pull/14332) by
+  [@jacob314](https://github.com/jacob314)), and dynamic terminal tab titles
+  ([#16378](https://github.com/google-gemini/gemini-cli/pull/16378) by
+  [@NTaylorMullen](https://github.com/NTaylorMullen)).
+- **Core Functionality & Performance:** This release includes support for
+  built-in agent skills
+  ([#16045](https://github.com/google-gemini/gemini-cli/pull/16045) by
+  [@NTaylorMullen](https://github.com/NTaylorMullen)), refined Gemini 3 system
+  instructions ([#16139](https://github.com/google-gemini/gemini-cli/pull/16139)
+  by [@NTaylorMullen](https://github.com/NTaylorMullen)), caching for ignore
+  instances to improve performance
+  ([#16185](https://github.com/google-gemini/gemini-cli/pull/16185) by
+  [@EricRahm](https://github.com/EricRahm)), and enhanced retry mechanisms
+  ([#16489](https://github.com/google-gemini/gemini-cli/pull/16489) by
+  [@sehoon38](https://github.com/sehoon38)).
+- **Bug Fixes and Stability:** We've squashed numerous bugs across the CLI,
+  core, and workflows, addressing issues with subagent delegation, unicode
+  character crashes, and sticky header regressions.
+
+## Announcements: v0.24.0 - 2026-01-14
+
+- **Agent Skills:** We've introduced significant advancements in Agent Skills.
+  This includes initial documentation and tutorials to help you get started,
+  alongside enhanced support for remote agents, allowing for more distributed
+  and powerful automation within Gemini CLI.
+  ([#15869](https://github.com/google-gemini/gemini-cli/pull/15869) by
+  [@NTaylorMullen](https://github.com/NTaylorMullen)),
+  ([#16013](https://github.com/google-gemini/gemini-cli/pull/16013) by
+  [@adamweidman](https://github.com/adamweidman))
+- **Improved UI/UX:** The user interface has received several updates, featuring
+  visual indicators for hook execution, a more refined display for settings, and
+  the ability to use the Tab key to effortlessly switch focus between the shell
+  and input areas.
+  ([#15408](https://github.com/google-gemini/gemini-cli/pull/15408) by
+  [@abhipatel12](https://github.com/abhipatel12)),
+  ([#14332](https://github.com/google-gemini/gemini-cli/pull/14332) by
+  [@galz10](https://github.com/galz10))
+- **Enhanced Security:** Security has been a major focus, with default folder
+  trust now set to untrusted for increased safety. The Policy Engine has been
+  improved to allow specific modes in user and administrator policies, and
+  granular allowlisting for shell commands has been implemented, providing finer
+  control over tool execution.
+  ([#15943](https://github.com/google-gemini/gemini-cli/pull/15943) by
+  [@galz10](https://github.com/galz10)),
+  ([#15977](https://github.com/google-gemini/gemini-cli/pull/15977) by
+  [@NTaylorMullen](https://github.com/NTaylorMullen))
+- **Core Functionality:** This release includes a mandatory MessageBus
+  injection, marking Phase 3 of a hard migration to a more robust internal
+  communication system. We've also added support for built-in skills with the
+  CLI itself, and enhanced model routing to effectively utilize subagents.
+  ([#15776](https://github.com/google-gemini/gemini-cli/pull/15776) by
+  [@abhipatel12](https://github.com/abhipatel12)),
+  ([#16300](https://github.com/google-gemini/gemini-cli/pull/16300) by
+  [@NTaylorMullen](https://github.com/NTaylorMullen))
+- **Terminal Features:** Terminal interactions are more seamless with new
+  features like OSC 52 paste support, along with fixes for Windows clipboard
+  paste issues and general improvements to pasting in Windows terminals.
+  ([#15336](https://github.com/google-gemini/gemini-cli/pull/15336) by
+  [@scidomino](https://github.com/scidomino)),
+  ([#15932](https://github.com/google-gemini/gemini-cli/pull/15932) by
+  [@scidomino](https://github.com/scidomino))
+- **New Commands:** To manage the new features, we've added several new
+  commands: `/agents refresh` to update agent configurations, `/skills reload`
+  to refresh skill definitions, and `/skills install/uninstall` for easier
+  management of your Agent Skills.
+  ([#16204](https://github.com/google-gemini/gemini-cli/pull/16204) by
+  [@NTaylorMullen](https://github.com/NTaylorMullen)),
+  ([#15865](https://github.com/google-gemini/gemini-cli/pull/15865) by
+  [@NTaylorMullen](https://github.com/NTaylorMullen)),
+  ([#16377](https://github.com/google-gemini/gemini-cli/pull/16377) by
+  [@NTaylorMullen](https://github.com/NTaylorMullen))
+
 ## Announcements: v0.23.0 - 2026-01-07
 
 - 🎉 **Experimental Agent Skills Support in Preview:** Gemini CLI now supports