Release v0.20.0

What's Changed

• Update error codes when process exiting the gemini cli by @megha1188 in https://github.com/google-gemini/gemini-cli/pull/13728
• chore(release): bump version to 0.20.0-nightly.20251126.d2a6cff4d by @gemini-cli-robot in https://github.com/google-gemini/gemini-cli/pull/13835
• feat(core): Improve request token calculation accuracy by @SandyTao520 in https://github.com/google-gemini/gemini-cli/pull/13824
• Changes in system instruction to adapt to gemini 3.0 to ensure that the CLI explains its actions before calling tools by @silviojr in https://github.com/google-gemini/gemini-cli/pull/13810
• feat(hooks): Hook Tool Execution Integration by @Edilmo in https://github.com/google-gemini/gemini-cli/pull/9108
• Add support for MCP server instructions behind config option by @chrstnb in https://github.com/google-gemini/gemini-cli/pull/13432
• Update System Instructions for interactive vs non-interactive mode. by @aishaneeshah in https://github.com/google-gemini/gemini-cli/pull/12315
• Add consent flag to Link command by @kevinjwang1 in https://github.com/google-gemini/gemini-cli/pull/13832
• feat(mcp): Inject GoogleCredentialProvider headers in McpClient by @sai-sunder-s in https://github.com/google-gemini/gemini-cli/pull/13783
• feat(core): implement towards policy-driven model fallback mechanism by @adamfweidman in https://github.com/google-gemini/gemini-cli/pull/13781
• feat(core): Add configurable inactivity timeout for shell commands by @galz10 in https://github.com/google-gemini/gemini-cli/pull/13531
• fix(auth): improve API key authentication flow by @galz10 in https://github.com/google-gemini/gemini-cli/pull/13829
• feat(hooks): Hook LLM Request/Response Integration by @Edilmo in https://github.com/google-gemini/gemini-cli/pull/9110
• feat(ui): Show waiting MCP servers in ConfigInitDisplay by @werdnum in https://github.com/google-gemini/gemini-cli/pull/13721
• Add usage limit remaining in /stats by @sehoon38 in https://github.com/google-gemini/gemini-cli/pull/13843
• feat(shell): Standardize pager to 'cat' for shell execution by model by @galz10 in https://github.com/google-gemini/gemini-cli/pull/13878
• chore/release: bump version to 0.20.0-nightly.20251127.5bed97064 by @gemini-cli-robot in https://github.com/google-gemini/gemini-cli/pull/13877
• Revert to default LICENSE (Revert #13449) by @scidomino in https://github.com/google-gemini/gemini-cli/pull/13876
• update(telemetry): OTel API response event with finish reasons by @kiranani in https://github.com/google-gemini/gemini-cli/pull/13849
• feat(hooks): Hooks Comprehensive Integration Testing by @Edilmo in https://github.com/google-gemini/gemini-cli/pull/9112
• chore: fix session browser test and skip hook system tests by @jackwotherspoon in https://github.com/google-gemini/gemini-cli/pull/14099
• feat(telemetry): Add Semantic logging for to ApiRequestEvents by @kiranani in https://github.com/google-gemini/gemini-cli/pull/13912
• test: Add verification for $schema property in settings schema by @maryamariyan in https://github.com/google-gemini/gemini-cli/pull/13497
• Fixes /clear command to preserve input history for up-arrow navigation while still clearing the context window and screen by @korade-krushna in https://github.com/google-gemini/gemini-cli/pull/14182
• fix(core): handle EPIPE error in hook runner when writing to stdin by @SandyTao520 in https://github.com/google-gemini/gemini-cli/pull/14231
• fix: Exclude web-fetch tool from executing in default non-interactive mode to avoid CLI hang. by @MayV in https://github.com/google-gemini/gemini-cli/pull/14244
• Always use MCP server instructions by @chrstnb in https://github.com/google-gemini/gemini-cli/pull/14297
• feat: auto-execute simple slash commands on Enter by @jackwotherspoon in https://github.com/google-gemini/gemini-cli/pull/13985
• chore/release: bump version to 0.20.0-nightly.20251201.2fe609cb6 by @gemini-cli-robot in https://github.com/google-gemini/gemini-cli/pull/14304
• feat: Add startup profiler to measure and record application initialization phases. by @kevin-ramdass in https://github.com/google-gemini/gemini-cli/pull/13638
• bug(core): Avoid stateful tool use in executor. by @joshualitt in https://github.com/google-gemini/gemini-cli/pull/14305
• feat(themes): add built-in holiday theme 🎁 by @jackwotherspoon in https://github.com/google-gemini/gemini-cli/pull/14301
• Updated ToC on docs intro; updated title casing to match Google style by @pcoet in https://github.com/google-gemini/gemini-cli/pull/13717
• feat(a2a): Urgent fix - Process modelInfo agent message by @cocosheng-g in https://github.com/google-gemini/gemini-cli/pull/14315
• feat(core): enhance availability routing with wrapped fallback and single-model policies by @adamfweidman in https://github.com/google-gemini/gemini-cli/pull/13874
• chore(logging): log the problematic event for #12122 by @briandealwis in https://github.com/google-gemini/gemini-cli/pull/14092
• fix: remove invalid type key in bug_report.yml by @fancive in https://github.com/google-gemini/gemini-cli/pull/13576
• update screenshot by @Transient-Onlooker in https://github.com/google-gemini/gemini-cli/pull/13976
• docs: Fix grammar error in Release Cadence (Nightly section) by @JuanCS-Dev in https://github.com/google-gemini/gemini-cli/pull/13866
• fix(async): prevent missed async errors from bypassing catch handlers by @amsminn in https://github.com/google-gemini/gemini-cli/pull/13714
• fix(zed-integration): remove extra field from acp auth request by @marcocondrache in https://github.com/google-gemini/gemini-cli/pull/13646
• feat(cli): Documentation for model configs. by @joshualitt in https://github.com/google-gemini/gemini-cli/pull/12967
• fix(ui): misaligned markdown table rendering by @dumbbellcode in https://github.com/google-gemini/gemini-cli/pull/8336
• docs: Update 4 files by @g-samroberts in https://github.com/google-gemini/gemini-cli/pull/13628
• fix: Conditionally add set -eEuo pipefail in setup-github command by @Smetalo in https://github.com/google-gemini/gemini-cli/pull/8550
• fix(cli): fix issue updating a component while rendering a different component by @jacob314 in https://github.com/google-gemini/gemini-cli/pull/14319
• Increase flakey test timeout by @chrstnb in https://github.com/google-gemini/gemini-cli/pull/14377
• Remove references to deleted kind/bug label by @scidomino in https://github.com/google-gemini/gemini-cli/pull/14383
• Don't fail test if we can't cleanup by @scidomino in https://github.com/google-gemini/gemini-cli/pull/14389
• feat(core): Implement JIT context manager and setting by @SandyTao520 in https://github.com/google-gemini/gemini-cli/pull/14324
• Use polling for extensions-reload integration test by @chrstnb in https://github.com/google-gemini/gemini-cli/pull/14391
• Add docs directive to GEMINI.md by @g-samroberts in https://github.com/google-gemini/gemini-cli/pull/14327
• Hide sessions that don't have user messages by @bl-ue in https://github.com/google-gemini/gemini-cli/pull/13994
• chore(ci): mark GitHub release as pre-release if not on "latest" npm channel by @ljxfstorm in https://github.com/google-gemini/gemini-cli/pull/7386
• fix(patch): cherry-pick d284fa6 to release/v0.20.0-preview.0-pr-14545 [CONFLICTS] by @gemini-cli-robot in https://github.com/google-gemini/gemini-cli/pull/14559
• fix(patch): cherry-pick 828afe1 to release/v0.20.0-preview.1-pr-14159 to patch version v0.20.0-preview.1 and create version 0.20.0-preview.2 by @gemini-cli-robot in https://github.com/google-gemini/gemini-cli/pull/14733
• fix(patch): cherry-pick 171103a to release/v0.20.0-preview.2-pr-14742 to patch version v0.20.0-preview.2 and create version 0.20.0-preview.5 by @gemini-cli-robot in https://github.com/google-gemini/gemini-cli/pull/14752

New Contributors

• @aishaneeshah made their first contribution in https://github.com/google-gemini/gemini-cli/pull/12315
• @sai-sunder-s made their first contribution in https://github.com/google-gemini/gemini-cli/pull/13783
• @maryamariyan made their first contribution in https://github.com/google-gemini/gemini-cli/pull/13497
• @korade-krushna made their first contribution in https://github.com/google-gemini/gemini-cli/pull/14182
• @pcoet made their first contribution in https://github.com/google-gemini/gemini-cli/pull/13717
• @Transient-Onlooker made their first contribution in https://github.com/google-gemini/gemini-cli/pull/13976
• @JuanCS-Dev made their first contribution in https://github.com/google-gemini/gemini-cli/pull/13866
• @marcocondrache made their first contribution in https://github.com/google-gemini/gemini-cli/pull/13646
• @g-samroberts made their first contribution in https://github.com/google-gemini/gemini-cli/pull/13628

Full Changelog: https://github.com/google-gemini/gemini-cli/compare/v0.19.4...v0.20.0