Issues

• File watcher process is restarted during backend shutdown and can be left orphaned

  eclipse-theia/theia#18163 · Filter by author haydar-metin opened on Oct 14, 2026
  1

• Multi-diff editor: add navigation and collapse/expand toolbar actions

  diff editorenhancementhelp wantedscm
  eclipse-theia/theia#18162 · Filter by author eneufeld opened on Oct 13, 2026

• Multi-diff editor: virtualize large diffs and synchronize scrolling

  diff editorhelp wantedscm
  eclipse-theia/theia#18161 · Filter by author eneufeld opened on Oct 13, 2026

• [Epic] Improve support for complex widgets in secondary windows

  enhancementepicsecondary-windowui/ux
  eclipse-theia/theia#18160 · Filter by author ndoschek opened on Oct 13, 2026
  

• Java extension fails to activate on 1.76.0

  extensionsjava
  eclipse-theia/theia#18137 · Filter by author sfieten opened on Oct 7, 2026
  2

• AI Chat: Support expand/collapse on messages

  enhancementhelp wantedtheia-ai
  eclipse-theia/theia#18136 · Filter by author CamilleLetavernier opened on Oct 7, 2026
  1

  

• Cannot open files with non-ASCII characters when files.autoGuessEncoding is true

  bugfilesystem
  eclipse-theia/theia#18135 · Filter by author j1147v opened on Oct 6, 2026
  2

• ai: openEditors variable should report editor state and include custom editors

  enhancementtheia-ai
  eclipse-theia/theia#18127 · Filter by author safisa opened on Oct 5, 2026

• Dev-container CLI attach / launch-args forwarding: follow-ups

  dev-container
  eclipse-theia/theia#18123 · Filter by author ndoschek opened on Oct 2, 2026
  1

• Show MCP server latestVersion when approval has no version

  enhancementtheia-ai
  eclipse-theia/theia#18108 · Filter by author fismif opened on Sep 30, 2026
  1

  

• Backend always exits with code 1 on Windows when trying to exit with non-zero code

  OS/Windowstheia-cli
  eclipse-theia/theia#18104 · Filter by author cdamus opened on Sep 29, 2026
  

• Local AI Quality of life issues

  enhancementepictheia-ai
  eclipse-theia/theia#18089 · Filter by author MatthewKhouzam opened on Sep 25, 2026
  1

• Reopening: Slash commands in Theia AI Configuration are not visible unless a folder/project is opened

  bugtheia-ai
  eclipse-theia/theia#18079 · Filter by author ng-sumit opened on Sep 25, 2026
  3

• Broken User Cancellation on Windows & Main-Thread Freezing in AI Terminal

  bughelp wantedOS/Windowstheia-ai
  eclipse-theia/theia#18076 · Filter by author codeCraft-Ritik opened on Sep 25, 2026
  4

• Permanent Hanging Promise & RPC Memory Leak in SCM Extension Host

  bughelp wantedOS/Windows
  eclipse-theia/theia#18075 · Filter by author codeCraft-Ritik opened on Sep 25, 2026
  2

• [browser-only] plugin globalState/workspaceState can silently drop writes when localStorage is full

  browser-onlybugfilesystemhelp wantedplug-in system
  eclipse-theia/theia#18066 · Filter by author robertjndw opened on Sep 24, 2026

• [browser-only] plugin startup downloads 5.7 MB of metadata and fetches every manifest separately

  browser-onlyenhancementhelp wantedperformanceplug-in system
  eclipse-theia/theia#18065 · Filter by author robertjndw opened on Sep 24, 2026

• Watch for non-existent files produces constant polling loop

  file-watchersperformance
  eclipse-theia/theia#18053 · Filter by author colin-grant-work opened on Sep 21, 2026
  2

• AI Chat: scroll position is not preserved when switching chat sessions

  enhancementtheia-ai
  eclipse-theia/theia#18031 · Filter by author safisa opened on Sep 16, 2026

• Spaces in MCP server names break the MCP tools

  bugtheia-ai
  Bug

  eclipse-theia/theia#18027 · Filter by author sdirix opened on Sep 15, 2026
  4

  

• File browser indentation setting behaves differently compared to VS Code

  bugtree
  eclipse-theia/theia#18025 · Filter by author martinmalmheden-jh opened on Sep 15, 2026
  4

• Flaky Explorer API test occasionally fails on CI for unrelated PRs

  citest
  Bug

  eclipse-theia/theia#18016 · Filter by author cdamus opened on Sep 12, 2026
  1

• ai-copilot: not working in WSL on Windows

  bugOS/Windows/WSLtheia-ai
  eclipse-theia/theia#17993 · Filter by author dirkfauth opened on Sep 4, 2026
  2

• ai: volatile editor context in system prompts defeats prompt caching

  bugtheia-ai
  eclipse-theia/theia#17986 · Filter by author safisa opened on Sep 2, 2026
  1

• AI chat: streamed tool calls lose their name with OpenAI-compatible providers, breaking the session

  bugtheia-ai
  eclipse-theia/theia#17985 · Filter by author mabexte opened on Sep 2, 2026
  2