gemini-cli/docs/changelogs/preview.md

Preview release: v0.40.0-preview.2

Released: April 23, 2026

Our preview release includes the latest, new, and experimental features. This release may not be as stable as our latest weekly release.

To install the preview release:

npm install -g @google/gemini-cli@preview

Highlights

• Ripgrep Binary Bundling: Ripgrep binaries are now bundled into the Single Executable Application (SEA), enabling grep functionality in offline environments.
• MCP Resource Tools: New core tools added to list and read MCP (Model Context Protocol) resources, expanding the agent's ability to interact with MCP servers.
• Local Model Setup: Introduced a streamlined gemini gemma command for easier local model setup and integration.
• Prompt-Driven Memory Management: Refactored memory management into a prompt-driven, four-tier system and integrated skill-creator for robust skill extraction.
• Enhanced UI and Accessibility: Added support for OSC 777 terminal notifications and GitHub colorblind themes for better user feedback and accessibility.

What's Changed

• chore(release): bump version to 0.40.0-nightly.20260414.g5b1f7375a by @gemini-cli-robot in #25420
• Fix(core): retry additional OpenSSL 3.x SSL errors during streaming (#16075) by @rcleveng in #25187
• fix(core): prevent YOLO mode from being downgraded by @galz10 in #25341
• feat: bundle ripgrep binaries into SEA for offline support by @scidomino in #25342
• Changelog for v0.39.0-preview.0 by @gemini-cli-robot in #25417
• feat(test): add large conversation scenario for performance test by @cynthialong0-0 in #25331
• improve(core): require recurrence evidence before extracting skills by @SandyTao520 in #25147
• test(evals): add subagent delegation evaluation tests by @anj-s in #24619
• feat: add github colorblind themes by @Z1xus in #15504
• fix(core): honor GOOGLE_GEMINI_BASE_URL and GOOGLE_VERTEX_BASE_URL by @chrisjcthomas in #25357
• fix(cli): clean up slash command IDE listeners by @jasonmatthewsuhari in #24397
• Changelog for v0.38.0 by @gemini-cli-robot in #25470
• fix(evals): update eval tests for invoke_agent telemetry and project-scoped memory by @SandyTao520 in #25502
• Changelog for v0.38.1 by @gemini-cli-robot in #25476
• feat(core): integrate skill-creator into skill extraction agent by @SandyTao520 in #25421
• feat(cli): provide default post-submit prompt for skill command by @ruomengz in #25327
• feat(core): add tools to list and read MCP resources by @ruomengz in #25395
• fix(evals): add typecheck coverage for evals, integration-tests, and memory-tests by @SandyTao520 in #25480
• Use OSC 777 for terminal notifications by @jackyliuxx in #25300
• fix(extensions): fix bundling for examples by @abhipatel12 in #25542
• fix(cli): reset plan session state on /clear by @jasonmatthewsuhari in #25515
• feat(core): add .mdx support to get-internal-docs tool by @g-samroberts in #25090
• docs(policy): mention that workspace policies are broken by @6112 in #24367
• fix(core): allow explicit write permissions to override governance file protections in sandboxes by @galz10 in #25338
• feat(sandbox): resolve custom seatbelt profiles from $HOME/.gemini first by @mvanhorn in #25427
• Reduce blank lines. by @gundermanc in #25563
• fix(ui): revert preview theme on dialog unmount by @JayadityaGit in #22542
• fix(core): fix ShellExecutionConfig spread and add ProjectRegistry save backoff by @mahimashanware in #25382
• feat(core): Disable topic updates for subagents by @gundermanc in #25567
• feat(core): enable topic update narration by default and promote to general by @gundermanc in #25586
• docs: migrate installation and authentication to mdx with tabbed layouts by @g-samroberts in #25155
• feat(config): split memoryManager flag into autoMemory by @SandyTao520 in #25601
• fix(core): allow Cloud Shell users to use PRO_MODEL_NO_ACCESS experiment by @sehoon38 in #25702
• fix(cli): round slow render latency to avoid opentelemetry float warning by @scidomino in #25709
• docs(tracker): introduce experimental task tracker feature by @anj-s in #24556
• docs(cli): fix inconsistent system.md casing in system prompt docs by @Bodlux in #25414
• feat(cli): add streamlined gemini gemma local model setup by @Samee24 in #25498
• Changelog for v0.38.2 by @gemini-cli-robot in #25593
• Fix: Disallow overriding IDE stdio via workspace .env (RCE) by @M0nd0R in #25022
• feat(test): refactor the memory usage test to use metrics from CLI process instead of test runner by @cynthialong0-0 in #25708
• feat(vertex): add settings for Vertex AI request routing by @gordonhwc in #25513
• Fix/allow for session persistence by @ahsanfarooq210 in #25176
• Allow dots on GEMINI_API_KEY by @DKbyo in #25497
• feat(telemetry): add flag for enabling traces specifically by @spencer426 in #25343
• fix(core): resolve nested plan directory duplication and relative path policies by @mahimashanware in #25138
• feat: detect new files in @ recommendations with watcher based updates by @prassamin in #25256
• fix(cli): use newline in shell command wrapping to avoid breaking heredocs by @cocosheng-g in #25537
• fix(cli): ensure theme dialog labels are rendered for all themes by @JayadityaGit in #24599
• fix(core): disable detached mode in Bun to prevent immediate SIGHUP of child processes by @euxaristia in #22620
• feat: add /new as alias for /clear and refine command description by @ved015 in #17865
• fix(cli): start auto memory in ACP sessions by @jasonmatthewsuhari in #25626
• fix(core): remove duplicate initialize call on agents refreshed by @adamfweidman in #25670
• test(e2e): default integration tests to Flash Preview by @SandyTao520 in #25753
• refactor(memory): replace MemoryManagerAgent with prompt-driven memory editing across four tiers by @SandyTao520 in #25716
• fix(cli): fix "/clear (new)" command by @mini2s in #25801
• fix(core): use dynamic CLI version for IDE client instead of hardcoded '1.0.0' by @thekishandev in #24414
• fix(core): handle line endings in ignore file parsing by @xoma-zver in #23895
• Fix/command injection shell by @Famous077 in #24170
• fix(ui): removed background color for input by @devr0306 in #25339
• fix(devtools): reduce memory usage and defer connection by @SandyTao520 in #24496
• fix(core): support jsonl session logs in memory and summary services by @SandyTao520 in #25816
• fix(release): exclude ripgrep binaries from npm tarballs by @SandyTao520 in #25841
• refactor(plan): simplify policy priorities and consolidate read-only rules by @ruomengz in #24849
• feat(test-utils): add memory usage integration test harness by @sripasg in #24876
• feat(memory): add /memory inbox command for reviewing extracted skills by @SandyTao520 in #24544
• chore(release): bump version to 0.39.0-nightly.20260408.e77b22e63 by @gemini-cli-robot in #24939
• fix(core): ensure robust sandbox cleanup in all process execution paths by @ehedlund in #24763
• chore: update ink version to 6.6.8 by @jacob314 in #24934
• Changelog for v0.38.0-preview.0 by @gemini-cli-robot in #24938
• chore: ignore conductor directory by @JayadityaGit in #22128
• Changelog for v0.37.0 by @gemini-cli-robot in #24940
• feat(plan): require user confirmation for activate_skill in Plan Mode by @ruomengz in #24946
• feat(test-utils): add CPU performance integration test harness by @sripasg in #24951
• fix(cli-ui): enable Ctrl+Backspace for word deletion in Windows Terminal by @dogukanozen in #21447
• test(sdk): add unit tests for GeminiCliSession by @AdamyaSingh7 in #21897
• fix(core): resolve windows symlink bypass and stabilize sandbox integration tests by @ehedlund in #24834
• fix(cli): restore file path display in edit and write tool confirmations by @jwhelangoog in #24974
• feat(core): refine shell tool description display logic by @jwhelangoog in #24903
• fix(core): dynamic session ID injection to resolve resume bugs by @scidomino in #24972
• Update ink version to 6.6.9 by @jacob314 in #24980
• Generalize evals infra to support more types of evals, organization and queuing of named suites by @gundermanc in #24941
• fix(cli): optimize startup with lightweight parent process by @sehoon38 in #24667
• refactor(sandbox): use centralized sandbox paths in macOS Seatbelt implementation by @ehedlund in #24984
• feat(cli): refine tool output formatting for compact mode by @jwhelangoog in #24677
• fix(sdk): skip broken sendStream tests to unblock nightly by @SandyTao520 in #25000
• refactor(core): use centralized path resolution for Linux sandbox by @ehedlund in #24985
• Support ctrl+shift+g by @jacob314 in #25035
• feat(core): refactor subagent tool to unified invoke_subagent tool by @abhipatel12 in #24489
• fix(core): add explicit git identity env vars to prevent sandbox checkpointing error by @mrpmohiburrahman in #19775
• fix: respect hideContextPercentage when FooterConfigDialog is closed without changes by @chernistry in #24773
• fix(cli): suppress unhandled AbortError logs during request cancellation by @euxaristia in #22621
• Automated documentation audit by @g-samroberts in #24567
• feat(cli): implement useAgentStream hook by @mbleigh in #24292
• refactor(plan) Clean default plan toml by @ruomengz in #25037
• refactor(core): remove legacy subagent wrapping tools by @abhipatel12 in #25053
• fix(core): honor retryDelay in RetryInfo for 503 errors by @yunaseoul in #25057
• fix(core): remediate subagent memory leaks using AbortSignal in MessageBus by @abhipatel12 in #25048
• feat(cli): wire up useAgentStream in AppContainer by @mbleigh in #24297
• feat(core): migrate chat recording to JSONL streaming by @spencer426 in #23749
• fix(core): clear 5-minute timeouts in oauth flow to prevent memory leaks by @spencer426 in #24968
• fix(sandbox): centralize async git worktree resolution and enforce read-only security by @ehedlund in #25040
• feat(test): add high-volume shell test and refine perf harness by @sripasg in #24983
• fix(core): silently handle EPERM when listing dir structure by @scidomino in #25066
• Changelog for v0.37.1 by @gemini-cli-robot in #25055
• fix: decode Uint8Array and multi-byte UTF-8 in API error messages by @kimjune01 in #23341
• Automated documentation audit results by @g-samroberts in #22755
• debugging(ui): add optional debugRainbow setting by @jacob314 in #25088
• fix: resolve lifecycle memory leaks by cleaning up listeners and root closures by @spencer426 in #25049
• docs(cli): updates f12 description to be more precise by @JayadityaGit in #15816
• fix(cli): mark /settings as unsafe to run concurrently by @jacob314 in #25061
• fix(core): remove buffer slice to prevent OOM on large output streams by @spencer426 in #25094
• feat(core): persist subagent agentId in tool call records by @abhipatel12 in #25092
• chore(core): increase codebase investigator turn limits to 50 by @abhipatel12 in #25125
• refactor(core): consolidate execute() arguments into ExecuteOptions by @mbleigh in #25101
• feat(core): add Strategic Re-evaluation guidance to system prompt by @aishaneeshah in #25062
• fix(core): preserve shell execution config fields on update by @jasonmatthewsuhari in #25113
• docs: add vi shortcuts and clarify MCP sandbox setup by @chrisjcthomas in #21679
• fix(cli): pass session id to interactive shell executions by @jasonmatthewsuhari in #25114
• fix(cli): resolve text sanitization data loss due to C1 control characters by @euxaristia in #22624
• feat(core): add large memory regression test by @cynthialong0-0 in #25059
• fix(core): resolve PTY exhaustion and orphan MCP subprocess leaks by @spencer426 in #25079
• chore(deps): update vulnerable dependencies via npm audit fix by @scidomino in #25140
• perf(sandbox): optimize Windows sandbox initialization via native ACL application by @ehedlund in #25077
• chore: switch from keytar to @github/keytar by @cocosheng-g in #25143
• fix: improve audio MIME normalization and validation in file reads by @junaiddshaukat in #21636
• docs: Update docs-audit to include changes in PR body by @g-samroberts in #25153
• docs: correct documentation for enforced authentication type by @cocosheng-g in #25142
• fix(cli): exclude update_topic from confirmation queue count by @Abhijit-2592 in #24945
• Memory fix for trace's streamWrapper. by @anthraxmilkshake in #25089
• fix(core): fix quota footer for non-auto models and improve display by @jackwotherspoon in #25121
• docs(contributing): clarify self-assignment policy for issues by @jmr in #23087
• feat(core): add skill patching support with /memory inbox integration by @SandyTao520 in #25148
• Stop suppressing thoughts and text in model response by @gundermanc in #25073
• fix(release): prefix git hash in nightly versions to prevent semver normalization by @SandyTao520 in #25304
• feat(cli): extract QuotaContext and resolve infinite render loop by @Adib234 in #24959
• refactor(core): extract and centralize sandbox path utilities by @ehedlund in #25305
• feat(ui): added enhancements to scroll momentum by @devr0306 in #24447
• fix(core): replace custom binary detection with isbinaryfile to correctly handle UTF-8 (U+FFFD) by @Anjaligarhwal in #25297
• feat(agent): implement tool-controlled display protocol (Steps 2-3) by @mbleigh in #25134
• Stop showing scrollbar unless we are in terminalBuffer mode by @jacob314 in #25320
• feat: support auth block in MCP servers config in agents by @TanmayVartak in #24770
• fix(core): expose GEMINI_PLANS_DIR to hook environment by @Adib234 in #25296
• feat(core): implement silent fallback for Plan Mode model routing by @jerop in #25317
• fix: correct redirect count increment in fetchJson by @KevinZhao in #24896
• fix(core): prevent secondary crash in ModelRouterService finally block by @gundermanc in #25333
• feat(core): introduce decoupled ContextManager and Sidecar architecture by @joshualitt in #24752
• docs(core): update generalist agent documentation by @abhipatel12 in #25325
• chore(mcp): check MCP error code over brittle string match by @jackwotherspoon in #25381
• feat(plan): update plan mode prompt to allow showing plan content by @ruomengz in #25058
• test(core): improve sandbox integration test coverage and fix OS-specific failures by @ehedlund in #25307
• fix(core): use debug level for keychain fallback logging by @ehedlund in #25398
• feat(test): add a performance test in asian language by @cynthialong0-0 in #25392
• feat(cli): enable mouse clicking for cursor positioning in AskUser multi-line answers by @Adib234 in #24630
• fix(core): detect kmscon terminal as supporting true color by @claygeo in #25282
• ci: add agent session drift check workflow by @adamfweidman in #25389
• use macos-latest-large runner where applicable. by @scidomino in #25413
• Changelog for v0.37.2 by @gemini-cli-robot in #25336

Full Changelog: https://github.com/google-gemini/gemini-cli/compare/v0.38.0-preview.0...v0.40.0-preview.2