# Preview release: v0.39.0-preview.0 Released: April 14, 2026 Our preview release includes the latest, new, and experimental features. This release may not be as stable as our [latest weekly release](latest.md). To install the preview release: ``` npm install -g @google/gemini-cli@preview ``` ## Highlights - **Refactored Subagents and Unified Tooling:** Consolidate subagent tools into a single `invoke_subagent` tool, removed legacy wrapping tools, and improved turn limits for codebase investigator. - **Advanced Memory and Skill Management:** Introduced `/memory` inbox for reviewing extracted skills and added skill patching support, enhancing agent learning and persistence. - **Expanded Test and Evaluation Infrastructure:** Added memory and CPU performance integration test harnesses and generalized evaluation infrastructure for better suite organization. - **Sandbox and Security Hardening:** Centralized sandbox paths for Linux and macOS, enforced read-only security for async git worktree resolution, and optimized Windows sandbox initialization. - **Enhanced CLI UX and UI Stability:** Improved scroll momentum, added a `debugRainbow` setting, and resolved various memory leaks and PTY exhaustion issues for a smoother terminal experience. ## What's Changed - refactor(plan): simplify policy priorities and consolidate read-only rules by @ruomengz in [#24849](https://github.com/google-gemini/gemini-cli/pull/24849) - feat(test-utils): add memory usage integration test harness by @sripasg in [#24876](https://github.com/google-gemini/gemini-cli/pull/24876) - feat(memory): add /memory inbox command for reviewing extracted skills by @SandyTao520 in [#24544](https://github.com/google-gemini/gemini-cli/pull/24544) - chore(release): bump version to 0.39.0-nightly.20260408.e77b22e63 by @gemini-cli-robot in [#24939](https://github.com/google-gemini/gemini-cli/pull/24939) - fix(core): ensure robust sandbox cleanup in all process execution paths by @ehedlund in [#24763](https://github.com/google-gemini/gemini-cli/pull/24763) - chore: update ink version to 6.6.8 by @jacob314 in [#24934](https://github.com/google-gemini/gemini-cli/pull/24934) - Changelog for v0.38.0-preview.0 by @gemini-cli-robot in [#24938](https://github.com/google-gemini/gemini-cli/pull/24938) - chore: ignore conductor directory by @JayadityaGit in [#22128](https://github.com/google-gemini/gemini-cli/pull/22128) - Changelog for v0.37.0 by @gemini-cli-robot in [#24940](https://github.com/google-gemini/gemini-cli/pull/24940) - feat(plan): require user confirmation for activate_skill in Plan Mode by @ruomengz in [#24946](https://github.com/google-gemini/gemini-cli/pull/24946) - feat(test-utils): add CPU performance integration test harness by @sripasg in [#24951](https://github.com/google-gemini/gemini-cli/pull/24951) - fix(cli-ui): enable Ctrl+Backspace for word deletion in Windows Terminal by @dogukanozen in [#21447](https://github.com/google-gemini/gemini-cli/pull/21447) - test(sdk): add unit tests for GeminiCliSession by @AdamyaSingh7 in [#21897](https://github.com/google-gemini/gemini-cli/pull/21897) - fix(core): resolve windows symlink bypass and stabilize sandbox integration tests by @ehedlund in [#24834](https://github.com/google-gemini/gemini-cli/pull/24834) - fix(cli): restore file path display in edit and write tool confirmations by @jwhelangoog in [#24974](https://github.com/google-gemini/gemini-cli/pull/24974) - feat(core): refine shell tool description display logic by @jwhelangoog in [#24903](https://github.com/google-gemini/gemini-cli/pull/24903) - fix(core): dynamic session ID injection to resolve resume bugs by @scidomino in [#24972](https://github.com/google-gemini/gemini-cli/pull/24972) - Update ink version to 6.6.9 by @jacob314 in [#24980](https://github.com/google-gemini/gemini-cli/pull/24980) - Generalize evals infra to support more types of evals, organization and queuing of named suites by @gundermanc in [#24941](https://github.com/google-gemini/gemini-cli/pull/24941) - fix(cli): optimize startup with lightweight parent process by @sehoon38 in [#24667](https://github.com/google-gemini/gemini-cli/pull/24667) - refactor(sandbox): use centralized sandbox paths in macOS Seatbelt implementation by @ehedlund in [#24984](https://github.com/google-gemini/gemini-cli/pull/24984) - feat(cli): refine tool output formatting for compact mode by @jwhelangoog in [#24677](https://github.com/google-gemini/gemini-cli/pull/24677) - fix(sdk): skip broken sendStream tests to unblock nightly by @SandyTao520 in [#25000](https://github.com/google-gemini/gemini-cli/pull/25000) - refactor(core): use centralized path resolution for Linux sandbox by @ehedlund in [#24985](https://github.com/google-gemini/gemini-cli/pull/24985) - Support ctrl+shift+g by @jacob314 in [#25035](https://github.com/google-gemini/gemini-cli/pull/25035) - feat(core): refactor subagent tool to unified invoke_subagent tool by @abhipatel12 in [#24489](https://github.com/google-gemini/gemini-cli/pull/24489) - fix(core): add explicit git identity env vars to prevent sandbox checkpointing error by @mrpmohiburrahman in [#19775](https://github.com/google-gemini/gemini-cli/pull/19775) - fix: respect hideContextPercentage when FooterConfigDialog is closed without changes by @chernistry in [#24773](https://github.com/google-gemini/gemini-cli/pull/24773) - fix(cli): suppress unhandled AbortError logs during request cancellation by @euxaristia in [#22621](https://github.com/google-gemini/gemini-cli/pull/22621) - Automated documentation audit by @g-samroberts in [#24567](https://github.com/google-gemini/gemini-cli/pull/24567) - feat(cli): implement useAgentStream hook by @mbleigh in [#24292](https://github.com/google-gemini/gemini-cli/pull/24292) - refactor(plan) Clean default plan toml by @ruomengz in [#25037](https://github.com/google-gemini/gemini-cli/pull/25037) - refactor(core): remove legacy subagent wrapping tools by @abhipatel12 in [#25053](https://github.com/google-gemini/gemini-cli/pull/25053) - fix(core): honor retryDelay in RetryInfo for 503 errors by @yunaseoul in [#25057](https://github.com/google-gemini/gemini-cli/pull/25057) - fix(core): remediate subagent memory leaks using AbortSignal in MessageBus by @abhipatel12 in [#25048](https://github.com/google-gemini/gemini-cli/pull/25048) - feat(cli): wire up useAgentStream in AppContainer by @mbleigh in [#24297](https://github.com/google-gemini/gemini-cli/pull/24297) - feat(core): migrate chat recording to JSONL streaming by @spencer426 in [#23749](https://github.com/google-gemini/gemini-cli/pull/23749) - fix(core): clear 5-minute timeouts in oauth flow to prevent memory leaks by @spencer426 in [#24968](https://github.com/google-gemini/gemini-cli/pull/24968) - fix(sandbox): centralize async git worktree resolution and enforce read-only security by @ehedlund in [#25040](https://github.com/google-gemini/gemini-cli/pull/25040) - feat(test): add high-volume shell test and refine perf harness by @sripasg in [#24983](https://github.com/google-gemini/gemini-cli/pull/24983) - fix(core): silently handle EPERM when listing dir structure by @scidomino in [#25066](https://github.com/google-gemini/gemini-cli/pull/25066) - Changelog for v0.37.1 by @gemini-cli-robot in [#25055](https://github.com/google-gemini/gemini-cli/pull/25055) - fix: decode Uint8Array and multi-byte UTF-8 in API error messages by @kimjune01 in [#23341](https://github.com/google-gemini/gemini-cli/pull/23341) - Automated documentation audit results by @g-samroberts in [#22755](https://github.com/google-gemini/gemini-cli/pull/22755) - debugging(ui): add optional debugRainbow setting by @jacob314 in [#25088](https://github.com/google-gemini/gemini-cli/pull/25088) - fix: resolve lifecycle memory leaks by cleaning up listeners and root closures by @spencer426 in [#25049](https://github.com/google-gemini/gemini-cli/pull/25049) - docs(cli): updates f12 description to be more precise by @JayadityaGit in [#15816](https://github.com/google-gemini/gemini-cli/pull/15816) - fix(cli): mark /settings as unsafe to run concurrently by @jacob314 in [#25061](https://github.com/google-gemini/gemini-cli/pull/25061) - fix(core): remove buffer slice to prevent OOM on large output streams by @spencer426 in [#25094](https://github.com/google-gemini/gemini-cli/pull/25094) - feat(core): persist subagent agentId in tool call records by @abhipatel12 in [#25092](https://github.com/google-gemini/gemini-cli/pull/25092) - chore(core): increase codebase investigator turn limits to 50 by @abhipatel12 in [#25125](https://github.com/google-gemini/gemini-cli/pull/25125) - refactor(core): consolidate execute() arguments into ExecuteOptions by @mbleigh in [#25101](https://github.com/google-gemini/gemini-cli/pull/25101) - feat(core): add Strategic Re-evaluation guidance to system prompt by @aishaneeshah in [#25062](https://github.com/google-gemini/gemini-cli/pull/25062) - fix(core): preserve shell execution config fields on update by @jasonmatthewsuhari in [#25113](https://github.com/google-gemini/gemini-cli/pull/25113) - docs: add vi shortcuts and clarify MCP sandbox setup by @chrisjcthomas in [#21679](https://github.com/google-gemini/gemini-cli/pull/21679) - fix(cli): pass session id to interactive shell executions by @jasonmatthewsuhari in [#25114](https://github.com/google-gemini/gemini-cli/pull/25114) - fix(cli): resolve text sanitization data loss due to C1 control characters by @euxaristia in [#22624](https://github.com/google-gemini/gemini-cli/pull/22624) - feat(core): add large memory regression test by @cynthialong0-0 in [#25059](https://github.com/google-gemini/gemini-cli/pull/25059) - fix(core): resolve PTY exhaustion and orphan MCP subprocess leaks by @spencer426 in [#25079](https://github.com/google-gemini/gemini-cli/pull/25079) - chore(deps): update vulnerable dependencies via npm audit fix by @scidomino in [#25140](https://github.com/google-gemini/gemini-cli/pull/25140) - perf(sandbox): optimize Windows sandbox initialization via native ACL application by @ehedlund in [#25077](https://github.com/google-gemini/gemini-cli/pull/25077) - chore: switch from keytar to @github/keytar by @cocosheng-g in [#25143](https://github.com/google-gemini/gemini-cli/pull/25143) - fix: improve audio MIME normalization and validation in file reads by @junaiddshaukat in [#21636](https://github.com/google-gemini/gemini-cli/pull/21636) - docs: Update docs-audit to include changes in PR body by @g-samroberts in [#25153](https://github.com/google-gemini/gemini-cli/pull/25153) - docs: correct documentation for enforced authentication type by @cocosheng-g in [#25142](https://github.com/google-gemini/gemini-cli/pull/25142) - fix(cli): exclude update_topic from confirmation queue count by @Abhijit-2592 in [#24945](https://github.com/google-gemini/gemini-cli/pull/24945) - Memory fix for trace's streamWrapper. by @anthraxmilkshake in [#25089](https://github.com/google-gemini/gemini-cli/pull/25089) - fix(core): fix quota footer for non-auto models and improve display by @jackwotherspoon in [#25121](https://github.com/google-gemini/gemini-cli/pull/25121) - docs(contributing): clarify self-assignment policy for issues by @jmr in [#23087](https://github.com/google-gemini/gemini-cli/pull/23087) - feat(core): add skill patching support with /memory inbox integration by @SandyTao520 in [#25148](https://github.com/google-gemini/gemini-cli/pull/25148) - Stop suppressing thoughts and text in model response by @gundermanc in [#25073](https://github.com/google-gemini/gemini-cli/pull/25073) - fix(release): prefix git hash in nightly versions to prevent semver normalization by @SandyTao520 in [#25304](https://github.com/google-gemini/gemini-cli/pull/25304) - feat(cli): extract QuotaContext and resolve infinite render loop by @Adib234 in [#24959](https://github.com/google-gemini/gemini-cli/pull/24959) - refactor(core): extract and centralize sandbox path utilities by @ehedlund in [#25305](https://github.com/google-gemini/gemini-cli/pull/25305) - feat(ui): added enhancements to scroll momentum by @devr0306 in [#24447](https://github.com/google-gemini/gemini-cli/pull/24447) - fix(core): replace custom binary detection with isbinaryfile to correctly handle UTF-8 (U+FFFD) by @Anjaligarhwal in [#25297](https://github.com/google-gemini/gemini-cli/pull/25297) - feat(agent): implement tool-controlled display protocol (Steps 2-3) by @mbleigh in [#25134](https://github.com/google-gemini/gemini-cli/pull/25134) - Stop showing scrollbar unless we are in terminalBuffer mode by @jacob314 in [#25320](https://github.com/google-gemini/gemini-cli/pull/25320) - feat: support auth block in MCP servers config in agents by @TanmayVartak in [#24770](https://github.com/google-gemini/gemini-cli/pull/24770) - fix(core): expose GEMINI_PLANS_DIR to hook environment by @Adib234 in [#25296](https://github.com/google-gemini/gemini-cli/pull/25296) - feat(core): implement silent fallback for Plan Mode model routing by @jerop in [#25317](https://github.com/google-gemini/gemini-cli/pull/25317) - fix: correct redirect count increment in fetchJson by @KevinZhao in [#24896](https://github.com/google-gemini/gemini-cli/pull/24896) - fix(core): prevent secondary crash in ModelRouterService finally block by @gundermanc in [#25333](https://github.com/google-gemini/gemini-cli/pull/25333) - feat(core): introduce decoupled ContextManager and Sidecar architecture by @joshualitt in [#24752](https://github.com/google-gemini/gemini-cli/pull/24752) - docs(core): update generalist agent documentation by @abhipatel12 in [#25325](https://github.com/google-gemini/gemini-cli/pull/25325) - chore(mcp): check MCP error code over brittle string match by @jackwotherspoon in [#25381](https://github.com/google-gemini/gemini-cli/pull/25381) - feat(plan): update plan mode prompt to allow showing plan content by @ruomengz in [#25058](https://github.com/google-gemini/gemini-cli/pull/25058) - test(core): improve sandbox integration test coverage and fix OS-specific failures by @ehedlund in [#25307](https://github.com/google-gemini/gemini-cli/pull/25307) - fix(core): use debug level for keychain fallback logging by @ehedlund in [#25398](https://github.com/google-gemini/gemini-cli/pull/25398) - feat(test): add a performance test in asian language by @cynthialong0-0 in [#25392](https://github.com/google-gemini/gemini-cli/pull/25392) - feat(cli): enable mouse clicking for cursor positioning in AskUser multi-line answers by @Adib234 in [#24630](https://github.com/google-gemini/gemini-cli/pull/24630) - fix(core): detect kmscon terminal as supporting true color by @claygeo in [#25282](https://github.com/google-gemini/gemini-cli/pull/25282) - ci: add agent session drift check workflow by @adamfweidman in [#25389](https://github.com/google-gemini/gemini-cli/pull/25389) - use macos-latest-large runner where applicable. by @scidomino in [#25413](https://github.com/google-gemini/gemini-cli/pull/25413) - Changelog for v0.37.2 by @gemini-cli-robot in [#25336](https://github.com/google-gemini/gemini-cli/pull/25336) **Full Changelog**: https://github.com/google-gemini/gemini-cli/compare/v0.38.0-preview.0...v0.39.0-preview.0