## What's Changed
* refactor(core): Improve environment variable handling in shell execution by @galz10 in https://github.com/google-gemini/gemini-cli/pull/14742
* Remove old E2E Workflows by @scidomino in https://github.com/google-gemini/gemini-cli/pull/14749
* fix: handle missing local extension config and skip hooks when disabled by @abhipatel12 in https://github.com/google-gemini/gemini-cli/pull/14744
* chore/release: bump version to 0.21.0-nightly.20251209.ec9a8c7a7 by @gemini-cli-robot in https://github.com/google-gemini/gemini-cli/pull/14751
* feat: Add support for MCP Resources by @MrLesk in https://github.com/google-gemini/gemini-cli/pull/13178
* Always set pending status in E2E tests by @scidomino in https://github.com/google-gemini/gemini-cli/pull/14756
* fix(lint): upgrade pip and use public pypi for yamllint by @allenhutchison in https://github.com/google-gemini/gemini-cli/pull/14746
* fix: use Gemini API supported image formats for clipboard by @jackwotherspoon in https://github.com/google-gemini/gemini-cli/pull/14762
* feat(a2a): Introduce restore command for a2a server by @cocosheng-g in https://github.com/google-gemini/gemini-cli/pull/13015
* allow final:true to be returned on a2a server edit calls. by @DavidAPierce in https://github.com/google-gemini/gemini-cli/pull/14747
* (fix) Automated pr labeller by @DaanVersavel in https://github.com/google-gemini/gemini-cli/pull/14788
* Update CODEOWNERS by @kklashtorny1 in https://github.com/google-gemini/gemini-cli/pull/14830
* Docs: Fix errors preventing site rebuild. by @jkcinouye in https://github.com/google-gemini/gemini-cli/pull/14842
* chore(deps): bump express from 5.1.0 to 5.2.0 by @dependabot[bot] in https://github.com/google-gemini/gemini-cli/pull/14325
* feat(ide): fallback to GEMINI_CLI_IDE_AUTH_TOKEN env var by @skeshive in https://github.com/google-gemini/gemini-cli/pull/14843
* feat: display quota stats for unused models in /stats by @sehoon38 in https://github.com/google-gemini/gemini-cli/pull/14764
* feat: ensure codebase investigator uses preview model when main agent does by @abhipatel12 in https://github.com/google-gemini/gemini-cli/pull/14412
* chore: add closing reason to stale bug workflow by @galz10 in https://github.com/google-gemini/gemini-cli/pull/14861
## New Contributors
* @MrLesk made their first contribution in https://github.com/google-gemini/gemini-cli/pull/13178
* @DavidAPierce made their first contribution in https://github.com/google-gemini/gemini-cli/pull/14747
* @kklashtorny1 made their first contribution in https://github.com/google-gemini/gemini-cli/pull/14830
**Full Changelog**: https://github.com/google-gemini/gemini-cli/compare/v0.21.0-nightly.20251209.ec9a8c7a7...v0.21.0-nightly.20251210.d90356e8a