Theia AI - Epic - next

[JonasHelming]

Coder / Agent improvements

• [Theia AI] Add function to validate a file #14973
• [Theia AI] Coder ChangeSet minor issue - Delete the change set when all changes are deleted #15048
• [Theia AI] Support multi root workspaces in workspace functions, changeset functions and context
• Allow to create new thread and follow-up thread in Coder chat
• Allow Coder to search workspace
• Handle agents that do not resolve the context in a user friendly way
• Prompt LLMs to produce links for files, so you can click them.

Chat View improvements

• [Theia AI] Persistence for chats #15031
• [Theia AI] Edit user messages / branch off conversations / start new conversation
• [Theia AI] Repeat last user requests
• [Theia AI] Hashtags always autocomplete in the chat #15028
• [Theia AI] Bad UX when scrolling up while a tool and its spinner is running or while streaming the response... #15049
• [Theia AI] Pin Agent - minor issue: need to add space after this operation #15051
• [Theia AI] Paste does not work in the right-click menu of chat input #15054
• AI scroll-lock suggestions #14362

General Features

• [Theia AI] Support prompt fragments #14899
• Allow to add all MCP functions to a prompt without listing them explicitly #14952
• Support Anthropics thinking mode
• Support more MCP concepts (roots, resources, templates)
• Support Gemini API
• Git Agent

General Improvements

• [Theia AI] Re-Investigate how function calls should remain in the message history #15034
• Missing I18N in UI #15035
• Rearchitecture Monaco integration for Inline editors, should resolve the workaround added with Chat Input is unusable #14924, Error: There are no document for untitled:/Untitled-1aichatviewlanguage #14842 and the vim extension (and other extensions) conflict
• Chat view conflicts with vim extension in Theia IDE
• Generalize or move ChangeSetVariableContribution and ContextSummaryVariableContribution #15001
• Agent settings do not validate in preferences
• Make Orchestrator more usable | It could mention pinning and shorten requests for classification
• Function schema should support full JSON Schema, see Support anyOf in function parameters #15012
• Code output from o3-mini language model is not formatted #14846
• [Theia AI] Put all prompts under MIT | Let contributors agree on PR
• [Theia AI] Tool Calling with OpenAI API Bug/Improvement: Ensure each function has a clear schema #14663
• Support AI variable dependencies explicitly #15000
• [Theia AI] Show the used context in the AI chat response #14961