Release v0.23.0-preview.0

What's Changed

• Code assist service metrics. by @gundermanc in https://github.com/google-gemini/gemini-cli/pull/15024
• chore/release: bump version to 0.21.0-nightly.20251216.bb0c0d8ee by @gemini-cli-robot in https://github.com/google-gemini/gemini-cli/pull/15121
• Docs by @Roaimkhan in https://github.com/google-gemini/gemini-cli/pull/15103
• Use official ACP SDK and support HTTP/SSE based MCP servers by @SteffenDE in https://github.com/google-gemini/gemini-cli/pull/13856
• Remove foreground for themes other than shades of purple and holiday. by @jacob314 in https://github.com/google-gemini/gemini-cli/pull/14606
• chore: remove repo specific tips by @jackwotherspoon in https://github.com/google-gemini/gemini-cli/pull/15164
• chore: remove user query from footer in debug mode by @jackwotherspoon in https://github.com/google-gemini/gemini-cli/pull/15169
• Disallow unnecessary awaits. by @gundermanc in https://github.com/google-gemini/gemini-cli/pull/15172
• Add one to the padding in settings dialog to avoid flicker. by @jacob314 in https://github.com/google-gemini/gemini-cli/pull/15173
• feat(core): introduce remote agent infrastructure and rename local executor by @adamfweidman in https://github.com/google-gemini/gemini-cli/pull/15110
• feat(cli): Add /auth logout command to clear credentials and auth state by @CN-Scars in https://github.com/google-gemini/gemini-cli/pull/13383
• (fix) Automated pr labeller by @DaanVersavel in https://github.com/google-gemini/gemini-cli/pull/14885
• feat: launch Gemini 3 Flash in Gemini CLI ⚡️⚡️⚡️ by @scidomino in https://github.com/google-gemini/gemini-cli/pull/15196
• Refactor: Migrate console.error in ripGrep.ts to debugLogger by @Adib234 in https://github.com/google-gemini/gemini-cli/pull/15201
• chore: update a2a-js to 0.3.7 by @adamfweidman in https://github.com/google-gemini/gemini-cli/pull/15197
• chore(core): remove redundant isModelAvailabilityServiceEnabled toggle and clean up dead code by @adamfweidman in https://github.com/google-gemini/gemini-cli/pull/15207
• feat(core): Late resolve GenerateContentConfigs and reduce mutation. by @joshualitt in https://github.com/google-gemini/gemini-cli/pull/14920
• Respect previewFeatures value from the remote flag if undefined by @sehoon38 in https://github.com/google-gemini/gemini-cli/pull/15214
• feat(ui): add Windows clipboard image support and Alt+V paste workaround by @jacob314 in https://github.com/google-gemini/gemini-cli/pull/15218
• chore(core): remove legacy fallback flags and migrate loop detection by @adamfweidman in https://github.com/google-gemini/gemini-cli/pull/15213
• fix(ui): Prevent eager slash command completion hiding sibling commands by @SandyTao520 in https://github.com/google-gemini/gemini-cli/pull/15224
• Docs: Update Changelog for Dec 17, 2025 by @jkcinouye in https://github.com/google-gemini/gemini-cli/pull/15204
• Code Assist backend telemetry for user accept/reject of suggestions by @gundermanc in https://github.com/google-gemini/gemini-cli/pull/15206
• fix(cli): correct initial history length handling for chat commands by @SandyTao520 in https://github.com/google-gemini/gemini-cli/pull/15223
• chore/release: bump version to 0.21.0-nightly.20251218.739c02bd6 by @gemini-cli-robot in https://github.com/google-gemini/gemini-cli/pull/15231
• Change detailed model stats to use a new shared Table class to resolve robustness issues. by @jacob314 in https://github.com/google-gemini/gemini-cli/pull/15208
• feat: add agent toml parser by @abhipatel12 in https://github.com/google-gemini/gemini-cli/pull/15112
• Add core tool that adds all context from the core package. by @jacob314 in https://github.com/google-gemini/gemini-cli/pull/15238
• (docs): Add reference section to hooks documentation by @abhipatel12 in https://github.com/google-gemini/gemini-cli/pull/15159
• feat(hooks): add support for friendly names and descriptions by @abhipatel12 in https://github.com/google-gemini/gemini-cli/pull/15174
• feat: Detect background color by @jacob314 in https://github.com/google-gemini/gemini-cli/pull/15132
• add 3.0 to allowed sensitive keywords by @scidomino in https://github.com/google-gemini/gemini-cli/pull/15276
• feat: Pass additional environment variables to shell execution by @galz10 in https://github.com/google-gemini/gemini-cli/pull/15160
• Remove unused code by @scidomino in https://github.com/google-gemini/gemini-cli/pull/15290
• Handle all 429 as retryableQuotaError by @sehoon38 in https://github.com/google-gemini/gemini-cli/pull/15288
• Remove unnecessary dependencies by @scidomino in https://github.com/google-gemini/gemini-cli/pull/15291
• fix: prevent infinite loop in prompt completion on error by @galz10 in https://github.com/google-gemini/gemini-cli/pull/14548
• fix(ui): show command suggestions even on perfect match and sort them by @SandyTao520 in https://github.com/google-gemini/gemini-cli/pull/15287
• feat(hooks): reduce log verbosity and improve error reporting in UI by @abhipatel12 in https://github.com/google-gemini/gemini-cli/pull/15297
• feat: simplify tool confirmation labels for better UX by @NTaylorMullen in https://github.com/google-gemini/gemini-cli/pull/15296
• chore/release: bump version to 0.21.0-nightly.20251219.70696e364 by @gemini-cli-robot in https://github.com/google-gemini/gemini-cli/pull/15301
• feat(core): Implement JIT context memory loading and UI sync by @SandyTao520 in https://github.com/google-gemini/gemini-cli/pull/14469
• feat(ui): Put "Allow for all future sessions" behind a setting off by default. by @jacob314 in https://github.com/google-gemini/gemini-cli/pull/15322
• fix(cli):change the placeholder of input during the shell mode by @JayadityaGit in https://github.com/google-gemini/gemini-cli/pull/15135
• Validate OAuth resource parameter matches MCP server URL by @galz10 in https://github.com/google-gemini/gemini-cli/pull/15289
• docs(cli): add System Prompt Override (GEMINI_SYSTEM_MD) by @ashmod in https://github.com/google-gemini/gemini-cli/pull/9515
• more robust command parsing logs by @scidomino in https://github.com/google-gemini/gemini-cli/pull/15339
• Introspection agent demo by @scidomino in https://github.com/google-gemini/gemini-cli/pull/15232
• fix(core): sanitize hook command expansion and prevent injection by @SandyTao520 in https://github.com/google-gemini/gemini-cli/pull/15343
• fix(folder trust): add validation for trusted folder level by @adamfweidman in https://github.com/google-gemini/gemini-cli/pull/12215
• fix(cli): fix right border overflow in trust dialogs by @galz10 in https://github.com/google-gemini/gemini-cli/pull/15350
• fix(policy): fix bug where accepting-edits continued after it was turned off by @jacob314 in https://github.com/google-gemini/gemini-cli/pull/15351
• fix: prevent infinite relaunch loop when --resume fails (#14941) by @Ying-xi in https://github.com/google-gemini/gemini-cli/pull/14951
• chore/release: bump version to 0.21.0-nightly.20251220.41a1a3eed by @gemini-cli-robot in https://github.com/google-gemini/gemini-cli/pull/15352
• feat(telemetry): add clearcut logging for hooks by @abhipatel12 in https://github.com/google-gemini/gemini-cli/pull/15405
• fix(core): Add .geminiignore support to SearchText tool by @xyrolle in https://github.com/google-gemini/gemini-cli/pull/13763

New Contributors

• @Roaimkhan made their first contribution in https://github.com/google-gemini/gemini-cli/pull/15103
• @SteffenDE made their first contribution in https://github.com/google-gemini/gemini-cli/pull/13856
• @CN-Scars made their first contribution in https://github.com/google-gemini/gemini-cli/pull/13383
• @Ying-xi made their first contribution in https://github.com/google-gemini/gemini-cli/pull/14951
• @xyrolle made their first contribution in https://github.com/google-gemini/gemini-cli/pull/13763

Full Changelog: https://github.com/google-gemini/gemini-cli/compare/v0.22.0-preview.3...v0.23.0-preview.0