SST Release Notes
Last updated: Feb 20, 2026
SST Products
All SST Release Notes (138)
- Feb 20, 2026
- Date parsed from source:Feb 20, 2026
- First seen by Releasebot:Feb 20, 2026
v1.2.10
Desktop
- Don't spawn sidecar if default is localhost server
SDK
- Build SDK to dist/ instead of dist/src
Thank you to 1 community contributor:
@rmk40:
docs: clarify tool name collision precedence (#14313)
- Feb 20, 2026
- Date parsed from source:Feb 20, 2026
- First seen by Releasebot:Feb 20, 2026
v1.2.9
Core
- Add missing id, sessionID, and messageID to MCP tool attachments (@NatChung)
- Remove unnecessary deep clones from session loop and LLM stream
- Remove User-Agent header assertion from LLM test to fix failing test
TUI
- Use structuredClone instead of remeda's clone for better performance and native support (@mhart)
Desktop
- Restore settings header mask
Thank you to 2 community contributors:
- @mhart:
Use structuredClone instead of remeda's clone (#14351) - @NatChung:
fix: add missing id/sessionID/messageID to MCP tool attachments (#14345)
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- Feb 19, 2026
- Date parsed from source:Feb 19, 2026
- First seen by Releasebot:Feb 20, 2026
v1.2.8
Core
Support adaptive thinking for Claude Sonnet 4.6 (@tctev)
TUI
Add custom tool and MCP call responses that are visible and collapsible (@yanosh-k)
Desktop
Black screen on launch with sidecar server fixed
Clear todos on abort
Thank you to 2 community contributors:
- @yanosh-k: feat(tui): add custom tool and mcp call responses visible and collapsable (#10649)
- @tctev: feat(opencode): support adaptive thinking for claude sonnet 4.6 (#14283)
- Feb 19, 2026
- Date parsed from source:Feb 19, 2026
- First seen by Releasebot:Feb 20, 2026
v1.2.7
Extensive product release with Bun-to-Filesystem migration, stronger terminal stability, and broad UI/UX improvements across desktop and TUI. Adds Julia language server, GitLab AI 3.6.0 with Sonnet 4.6, enhanced auth and AI providers, plus numerous stability and performance fixes.
Core
- Fixed terminal rendering and interaction issues in the application
- Normalize file status paths relative to instance directory (@shantur)
- Migrate from Bun.Glob to npm glob package
- Bump AI SDK packages for Google, Google Vertex, Anthropic, Bedrock, and provider utils
- Add support for medium reasoning with Gemini 3.1
- Remove use of Bun.file
- Text files misclassified as binary
- Fetch default server at top level in desktop application
- Terminal rework in the app
- Bake in the AWS and Google authentication packages
- Token substitution in OPENCODE_CONFIG_CONTENT now works correctly (@ariane-emory)
- Revert migration from Bun.file() to Filesystem module
- Migrate project.ts from Bun.file() to Filesystem/stat modules
- Migrate read tool from Bun.file() to Filesystem module
- Migrate write tool from Bun.file() to Filesystem module
- Migrate Edit tool from Bun.file() to Filesystem module
- Migrate remaining tool files from Bun.file() to Filesystem/stat modules
- Migrate storage.ts from Bun.file()/Bun.write() to Filesystem module
- Migrate src/storage/json-migration.ts from Bun.file() to Filesystem module
- Migrate MCP auth module from Bun file APIs to Filesystem module
- Migrate storage database from Bun.file() to statSync for file existence checks
- Migrate session prompt module from Bun.file() to Filesystem/stat modules
- Fix crash in opencode run and show errored tool calls in output
- Migrate skill discovery to use Filesystem module instead of Bun file APIs
- Migrate session instruction handling from Bun.file() to Filesystem module
- Migrate provider.ts from Bun.file() to Filesystem module
- Migrate shell.ts from Bun.file() to statSync for improved file system operations
- Migrate log utility from Bun.file() to Node.js fs module for better compatibility
- Migrate models.ts from Bun.file()/Bun.write() to Filesystem module
- Use HashiCorp releases API for installing terraform-ls (@edubxb)
- Migrate LSP server from Bun.file()/Bun.write() to Filesystem module
- Migrate session command from Bun.file() to statSync for improved file system operations
- Migrate agent.ts from Bun.file() to Filesystem module
- Migrate auth module from Bun.file()/Bun.write() to Filesystem module
- Pass sessionID and callID to shell.env hook input (@tesdal)
- Fix terminal cross-talk issue in the application
- Update SST version
- Migrate src/global/index.ts from Bun.file() to Filesystem module
- Emit PROMPT_TOO_LARGE error when GitHub context overflows (@elithrar)
- Migrate src/bun/index.ts from Bun.file()/Bun.write() to Filesystem module
- Migrate config/markdown.ts from Bun.file() to Filesystem module
- Migrate file/index.ts from Bun.file() to Filesystem module
- Migrate format/formatter.ts from Bun.file() to Filesystem module
- Allow readJson to be called without explicit type parameter
- Migrate file/ripgrep.ts from Bun APIs to Filesystem module
- Migrate index.ts from Bun.file() to Filesystem module
- Add Julia language server support (@zarly)
- Bump GitLab AI provider to 3.6.0 to add Sonnet 4.6 support (@vglafirov)
- Add centralized filesystem module for Bun.file migration
- Fix Clojure syntax highlighting (@finalfantasia)
- Ensure explore subagent prompts for external directory permission instead of auto-denying
- Don't autoload kilo
- Add Kilo as a native provider (@Nomadcxx)
- Simplify redundant ternary in updateMessage (@yikayiyo)
- Ensure Read tool uses fs/promises for all file system operations
- Make read tool more memory efficient
- Surface plugin auth providers in the login picker (@anoldguy)
- Invalidate OAuth credentials when OAuth provider indicates they are invalid (@GreenStage)
- Don't fetch models.dev on completion (@gigamonster256)
- Recover state after SSE reconnect and harden SSE streams
- Keep message part order stable when files resolve asynchronously
- Drop IDs from attachments in tools and assign them in prompt.ts instead
TUI
- Improve GitHub action branch detection and handle 422 errors (@elithrar)
- Ensure onExit callback fires after terminal output is written
- Migrate TUI thread module from Bun.file() to Filesystem module
- Migrate agent command from Bun.file()/Bun.write() to Filesystem module
- Migrate import command from Bun.file() to Filesystem module
- Update pasteImage to only increment count when the previous attachment is an image (@OpeOginni)
- Migrate editor.ts from Bun.file()/Bun.write() to Filesystem module
- Migrate clipboard.ts from Bun.file() to Filesystem module
- Migrate CLI run command from Bun.file() to Filesystem/stat modules
- Session list --max-count parameter now correctly limits the number of sessions displayed (@mharris717)
- Exit cleanly without hanging after session ends
- Style scrollbox for permission and sidebar (@akronb)
- Increase button heights and improve permission prompt layout alignment
- Display new session banner with logo and project details in TUI
Desktop
- Update Japanese translations for WSL integration (@taroj1205)
- Made localhost URLs work correctly in isLocal function
- Navigate to last session when navigating to a project
- Fix typecheck errors in app
- Deduplicate allServers list in app
- Adjust session turn horizontal padding
- Tighten prompt dock padding in app
- Fixed sidecar spawning a window on Windows
- Delay prompt mode toggle tooltip
- Shorten prompt mode toggle tooltips in the app
- Reduce review panel padding
- Tweak search button style in UI
- Expanded color state on titlebar buttons
- Tweak hover and active styles for title bar buttons
- Share button now has a border
- Adjust file tree background color
- Handle sidecar key in projectsKey for desktop projects
- Fixed desktop app incorrectly identifying local servers
- Refactor server management backend
- Use group-hover for file tree icon color swap at all nesting levels
- Simplify mode toggle icon styling in TUI
- Clean up desktop implementation
- Temporarily disable WSL support in desktop application
- Use radio group in prompt input
- Simplify prompt mode toggle icon colors via CSS and tighten message timeline padding in TUI
- Fix prompt input quirks in app
- Terminal disconnect and resync functionality fixed
- Replicate tauri-plugin-shell logic in desktop application
- Improve modified file visibility and button spacing in TUI
- Show monochrome file icons by default in tree view, revealing colors on hover to reduce visual clutter
- Fix share button text styling to use consistent 12px regular font weight
- Add warning icon to permission requests for better visibility
- Extract dock prompt shell component
- UI no longer flashes when switching tabs (@neriousy)
- Avoid sidecar health-check timeout on shell startup in desktop app (@ysm-dev)
- Increase prompt mode toggle height for better clickability
- Add more end-to-end tests for desktop application (@neriousy)
- Update magnifying-glass icon in UI
- Tighten titlebar action padding
- Refine titlebar search and open padding
- Center titlebar search and soften keybind styling
- Align titlebar search text size
- Match titlebar active background to hover
- Use weak borders in titlebar actions
- Reduce titlebar right padding
- Keep file tree toggle visible
- Adjust icon button spacing in UI
- Session timeline and turn handling reworked in app
- Keep Escape handling local to prompt input on macOS desktop (@itskritix)
- Hide server CLI window on Windows
SDK
- Fix nested exports transformation in SDK publish script
Thank you to 25 community contributors:
- @itskritix:
fix(app): keep Escape handling local to prompt input on macOS desktop (#13963) - @vynnlee:
docs(ko): improve Korean translation accuracy and clarity in Zen docs (#13951) - @chenmijiang:
docs: improve zh-cn and zh-tw documentation translations (#13942) - @hmu332233:
fix(docs): correct reversed meaning in Korean plugins logging section (#13945) - @neriousy:
feat(desktop): more e2e tests (#13975)
fix(app): ui flashing when switching tabs (#13978) - @ysm-dev:
fix(desktop): avoid sidecar health-check timeout on shell startup (#13925) - @alexcarpenter:
fix: Homepage video section layout shift (#13987) - @gigamonster256:
fix: don't fetch models.dev on completion (#13997) - @GreenStage:
fix: Invalidate oauth credentials when oauth provider says so (#14007) - @anoldguy:
feat: surface plugin auth providers in the login picker (#13921) - @akronb:
fix(tui): style scrollbox for permission and sidebar (#12752) - @yikayiyo:
refactor: simplify redundant ternary in updateMessage (#13954) - @Nomadcxx:
feat: add Kilo as a native provider (#13765) - @finalfantasia:
fix(opencode): fix Clojure syntax highlighting (#13453) - @mharris717:
fix(cli): session list --max-count not honored, shows too few sessions (#14162) - @vglafirov:
feat: GitLab Duo - bump gitlab-ai-provider to 3.6.0 (adds Sonnet 4.6) (#14115) - @zarly:
feat: add Julia language server support (#14129) - @elithrar:
fix(github): emit PROMPT_TOO_LARGE error on context overflow (#14166)
fix(github): action branch detection and 422 handling (#14322) - @OpeOginni:
fix(opencode): update pasteImage to only increment count when the previous attachment is an image too (#14173) - @tesdal:
feat(plugin): pass sessionID and callID to shell.env hook input (#13662) - @edubxb:
fix(lsp): use HashiCorp releases API for installing terraform-ls (#14200) - @ariane-emory:
fix: token substitution in OPENCODE_CONFIG_CONTENT (alternate take) (#14047) - @Seungjun0906:
docs(ko): improve wording in ecosystem, enterprise, formatters, and github docs (#14220) - @shantur:
fix(core): normalize file.status paths relative to instance dir (#14207) - @taroj1205:
feat(i18n): update Japanese translations to WSL integration (#13160)
- Feb 18, 2026
- Date parsed from source:Feb 18, 2026
- First seen by Releasebot:Feb 19, 2026
- Feb 16, 2026
- Date parsed from source:Feb 16, 2026
- First seen by Releasebot:Feb 17, 2026
v1.2.6
New and updated capabilities roll out across languages and tooling, from dfmt and cljfmt formatters to OpenAI endpoint support for Vertex and enhanced config options. Improvements include token refresh, TUI prompts, database migration, and contributor acknowledgments.
Core
- Add dfmt formatter support for D language files (@burner)
- Bump GitLab provider and auth plugin for mid-session token refresh (@vglafirov)
- Remove unnecessary per-message title LLM calls (@rmk40)
- Prioritize user-defined variables over environment variables in Google Vertex AI configuration
- Add OpenAI-compatible endpoint support for Google Vertex provider (@leehack)
- Add Venice support for temperature, topP, topK, and smallOption parameters (@dpuyosa)
- Add cljfmt formatter support for Clojure files (@finalfantasia)
TUI
- Make use of server directory path for file references in prompts (@OpeOginni)
- Add database migration command to convert JSON storage to SQLite
- Add --continue and --fork flags to attach command
- Fixed inaccurate tips in TUI (@imanolmzd-svg)
Desktop
- Normalize Linux Wayland/X11 backend and decoration policy (@bnema)
- Use process-wrap library instead of manual job object handling in desktop (@Brendonovich)
Thank you to 12 community contributors:
@finalfantasia:
feat(opencode): add cljfmt formatter support for Clojure files (#13426)@pkx07:
fix(website): correct zh-CN translation of proprietary terms in zen.mdx (#13734)@Brendonovich:
desktop: use process-wrap instead of manual job object (#13431)@dpuyosa:
feat(opencode): Add Venice support in temperature, topP and smallOption (#13553)@bnema:
fix(desktop): normalize Linux Wayland/X11 backend and decoration policy (#13143)@leehack:
feat: add openai-compatible endpoint support for google-vertex provider (#10303)@hobostay:
fix(docs): correct critical translation errors in Russian zen page (#13830)@rmk40:
fix(core): remove unnecessary per-message title LLM calls (#13804)@imanolmzd-svg:
fix (tui): Inaccurate tips (#13845)@vglafirov:
fix: bump GitLab provider and auth plugin for mid-session token refresh (#13850)@OpeOginni:
fix(tui): make use of server dir path for file references in prompts (#13781)@burner:
feat(opencode): add dfmt formatter support for D language files (#13867)
- Feb 15, 2026
- Date parsed from source:Feb 15, 2026
- First seen by Releasebot:Feb 15, 2026
v1.2.5
Desktop update delivers developer friendly fixes and new font support. SQLite migration logs now go to stderr, focus window after update, and Shift+Tab navigation announced. GeistMono Nerd Font added to mono options. Numerous small fixes and thanks to 7 community contributors.
Core
- Ensure SQLite migration logs to stderr instead of stdout
Desktop
- Fixed issue viewing new files opened from the file tree (@shanebishop1)
- Only navigate prompt history at input boundaries (@nexxeln)
- Add keyboard shortcut Shift+Tab to the application (@neriousy)
- Focus window after update and relaunch (@zerone0x)
- Add GeistMono Nerd Font to available mono font options (@brandon-julio-t)
Thank you to 7 community contributors:
- @brandon-julio-t:
feat: Add GeistMono Nerd Font to available mono font options (#13720) - @zerone0x:
fix(desktop): focus window after update/relaunch (#13701) - @dector:
docs: add Ukrainian README translation (#13697) - @neriousy:
fix(app): keybind [shift+tab] (#13695) - @nexxeln:
fix(app): only navigate prompt history at input boundaries (#13690) - @shanebishop1:
fix(desktop): issue viewing new files opened from the file tree (#13689) - @alexyaroshuk:
feat(app): localize "free usage exceeded" error & "Add credits" clickable link (#13652)
- Feb 15, 2026
- Date parsed from source:Feb 15, 2026
- First seen by Releasebot:Feb 15, 2026
v1.2.4
Core
- Add db command for database inspection and querying
- Derive all IDs from file paths during JSON migration
Desktop
- Clear notifications action
- Fixed stack overflow issue in file tree component
- Feb 15, 2026
- Date parsed from source:Feb 15, 2026
- First seen by Releasebot:Feb 15, 2026
v1.2.3
Core
- Ensure Anthropic models on OpenRouter also have variant support
- Add WAL checkpoint on database open
- Ensure Vercel variants pass Amazon models under Bedrock key
- Feb 14, 2026
- Date parsed from source:Feb 14, 2026
- First seen by Releasebot:Feb 15, 2026
v1.2.2
Core
- Add comprehensive test coverage for Session.list() filters
- Filter sessions at database level to improve session list loading performance
- Fix Vercel gateway variants
- Bump Vertex AI packages