Source: https://seerepo.com/r/eclipse-theia/theia/built Markdown source: https://seerepo.com/r/eclipse-theia/theia/built.md Description: theia is a TypeScript repo built with Electron, React, Express, and vhost. It stores its data in electron-store and signs people in with keytar. # What is theia built with? theia is a TypeScript repo built with Electron, React, Express, and vhost. It stores its data in electron-store, signs people in with keytar, uses AI through Anthropic, OpenAI, @openai/codex-sdk, and ollama, makes its content with mustache, js-yaml, dompurify, markdown-it, markdown-it-anchor, and 3 more, validates its data with Zod and Ajv, is tested with Chai, sinon, Puppeteer, Mocha, jsdom, and 1 more, deploys with prom-client, and uses Hugging Face, MCP, and idb. It has 648,258 written lines, with 773 test files. Read on November 5, 2026, at commit 30a5482. Repository: https://github.com/eclipse-theia/theia ## Support (dev-packages/application-manager) ### Testing - **Chai**: 2 files ### Tools - **yargs**: 1 file ### Other - **fs-extra**: 7 files - **SemVer**: 1 file ## Support (dev-packages/application-package) ### The base - **[Electron](https://seerepo.com/uses/electron)**: 1 file ### Testing - **sinon**: 1 file ### Other - **deepmerge**: 1 file - **fs-extra**: 1 file - **SemVer**: 1 file - **temp**: 1 file ## Support (dev-packages/bundle-plugin) ### Testing - **Chai**: 1 file ### Tools - **detect-libc**: 1 file - **esbuild**: 1 file ## Support (dev-packages/cli) ### Testing - **Puppeteer**: 2 files - **Mocha**: 1 file ### Tools - **glob**: 1 file - **log-update**: 1 file - **yargs**: 1 file ### Other - **chalk**: 2 files - **limiter**: 2 files - **temp**: 2 files - **escape-string-regexp**: 1 file ## Support (dev-packages/ffmpeg) ### Tools - **@electron/get**: 1 file ### Other - **fs-extra**: 2 files - **unzipper**: 1 file ## Support (dev-packages/localization-manager) ### Tools - **glob**: 1 file - **TypeScript**: 1 file ### Other - **fs-extra**: 2 files - **chalk**: 1 file - **deepmerge**: 1 file - **limiter**: 1 file ## Support (dev-packages/ovsx-client) ### Other - **limiter**: 1 file - **SemVer**: 1 file ## Support (dev-packages/private-eslint-plugin) ### Tools - **ESLint**: 5 files - **@typescript-eslint/parser**: 1 file ### Other - **js-levenshtein**: 1 file ## Support (dev-packages/private-ext-scripts) ### Tools - **@parcel/watcher**: 1 file - **glob**: 1 file - **yargs**: 1 file ### Other - **debug**: 1 file ## Support (dev-packages/private-re-exports) ### Content - **mustache**: 1 file ### Testing - **Chai**: 1 file ### Tools - **TypeScript**: 1 file - **yargs**: 1 file ### Other - **SemVer**: 1 file ## Support (dev-packages/request) ### Testing - **Chai**: 2 files ### Other - **undici**: 2 files ## Backend (packages/ai-anthropic) ### Services - **[Anthropic](https://seerepo.com/uses/anthropic)**: 2 files · [packages/ai-anthropic/src/node/anthropic-language-model.ts, line 42](https://github.com/eclipse-theia/theia/blob/30a5482386400715f42b541b4b142fd399ada7f3/packages/ai-anthropic/src/node/anthropic-language-model.ts#L42) ## Support (packages/ai-anthropic) ### Testing - **Chai**: 2 files ## Frontend (packages/ai-chat-ui) ### Interface - **[Mermaid](https://seerepo.com/uses/mermaid)**: 1 file ## Support (packages/ai-chat-ui) ### Testing - **Chai**: 25 files - **sinon**: 1 file ### Other - **reflect-metadata**: 7 files ## Support (packages/ai-chat) ### Testing - **Chai**: 27 files - **sinon**: 8 files ### Other - **reflect-metadata**: 4 files ## Backend (packages/ai-chatgpt) ### Services - **[OpenAI](https://seerepo.com/uses/openai)**: 1 file · [packages/ai-chatgpt/src/node/chatgpt-language-model.ts, line 25](https://github.com/eclipse-theia/theia/blob/30a5482386400715f42b541b4b142fd399ada7f3/packages/ai-chatgpt/src/node/chatgpt-language-model.ts#L25) ## Support (packages/ai-chatgpt) ### Testing - **Chai**: 9 files - **sinon**: 3 files ## Support (packages/ai-code-completion) ### Testing - **Chai**: 3 files - **sinon**: 1 file ## Backend (packages/ai-codex) ### AI - **@openai/codex-sdk**: 7 files ## Support (packages/ai-codex) ### Testing - **Chai**: 2 files - **sinon**: 2 files ## Support (packages/ai-copilot) ### Testing - **Chai**: 9 files ## Support (packages/ai-core-ui) ### Testing - **Chai**: 5 files ### Other - **reflect-metadata**: 1 file ## Support (packages/ai-core) ### Content - **[js-yaml](https://seerepo.com/uses/js-yaml)**: 3 files ### Testing - **Chai**: 41 files - **sinon**: 8 files ### Other - **reflect-metadata**: 8 files - **inversify**: 4 files - **fast-deep-equal**: 1 file - **fast-json-stable-stringify**: 1 file - **undici**: 1 file ## Support (packages/ai-external-api) ### Testing - **Chai**: 4 files ## Support (packages/ai-google) ### Testing - **Chai**: 2 files ## Backend (packages/ai-hugging-face) ### Services - **[Hugging Face](https://seerepo.com/uses/hugging-face)**: 1 file · [packages/ai-hugging-face/src/node/huggingface-language-model.ts, line 28](https://github.com/eclipse-theia/theia/blob/30a5482386400715f42b541b4b142fd399ada7f3/packages/ai-hugging-face/src/node/huggingface-language-model.ts#L28) ## Support (packages/ai-hugging-face) ### Testing - **Chai**: 1 file ## Support (packages/ai-ide) ### Testing - **Chai**: 42 files - **sinon**: 5 files - **Puppeteer**: 1 file ### Tools - **ignore**: 1 file - **simple-git**: 1 file ### Other - **minimatch**: 1 file - **reflect-metadata**: 1 file ## Backend (packages/ai-mcp-server) ### Services - **[MCP](https://seerepo.com/uses/mcp)**: 7 files · [packages/ai-mcp-server/src/browser/mcp-frontend-contribution.ts, line 18](https://github.com/eclipse-theia/theia/blob/30a5482386400715f42b541b4b142fd399ada7f3/packages/ai-mcp-server/src/browser/mcp-frontend-contribution.ts#L18) ## Support (packages/ai-mcp-server) ### Validation - **[Zod](https://seerepo.com/uses/zod)**: 2 files ## Support (packages/ai-mcp-ui) ### Testing - **Chai**: 1 file ## Backend (packages/ai-mcp) ### Services - **[MCP](https://seerepo.com/uses/mcp)**: 5 files · [packages/ai-mcp-server/src/browser/mcp-frontend-contribution.ts, line 18](https://github.com/eclipse-theia/theia/blob/30a5482386400715f42b541b4b142fd399ada7f3/packages/ai-mcp-server/src/browser/mcp-frontend-contribution.ts#L18) ## Support (packages/ai-mcp) ### Testing - **Chai**: 17 files - **sinon**: 1 file ### Other - **reflect-metadata**: 1 file ## Backend (packages/ai-ollama) ### AI - **ollama**: 1 file ## Support (packages/ai-ollama) ### Testing - **Chai**: 2 files - **sinon**: 1 file ## Backend (packages/ai-openai) ### Services - **[OpenAI](https://seerepo.com/uses/openai)**: 6 files · [packages/ai-chatgpt/src/node/chatgpt-language-model.ts, line 25](https://github.com/eclipse-theia/theia/blob/30a5482386400715f42b541b4b142fd399ada7f3/packages/ai-chatgpt/src/node/chatgpt-language-model.ts#L25) ## Support (packages/ai-openai) ### Testing - **Chai**: 10 files - **sinon**: 4 files ## Support (packages/ai-registry) ### Testing - **Chai**: 28 files - **sinon**: 1 file ## Support (packages/ai-terminal) ### Validation - **[Zod](https://seerepo.com/uses/zod)**: 1 file ### Testing - **Chai**: 9 files - **sinon**: 3 files ## Support (packages/ai-tool-sketchpad) ### Content - **[js-yaml](https://seerepo.com/uses/js-yaml)**: 1 file ## Support (packages/bulk-edit) ### Testing - **Chai**: 1 file ## Support (packages/callhierarchy) ### Other - **ts-md5**: 1 file ## Support (packages/collaboration) ### Testing - **Chai**: 1 file ### Other - **yjs**: 2 files - **lib0**: 1 file - **y-protocols**: 1 file ## Support (packages/console) ### Other - **anser**: 1 file ## Frontend (packages/core) ### The base - **[React](https://seerepo.com/uses/react)**: 37 files ### Interface - **lumino**: 29 files - **react-virtuoso**: 3 files - **react-tooltip**: 1 file ### Icons - **@vscode/codicons**: 1 file - **Font Awesome**: 1 file ## Backend (packages/core) ### The base - **[Express](https://seerepo.com/uses/express)**: 2 files · [in packages/core/package.json](https://github.com/eclipse-theia/theia/blob/30a5482386400715f42b541b4b142fd399ada7f3/packages/core/package.json) ### Sign-in - **keytar**: 1 file ## Support (packages/core) ### The base - **[Electron](https://seerepo.com/uses/electron)**: 1 file ### Content - **[dompurify](https://seerepo.com/uses/dompurify)**: 2 files - **[markdown-it](https://seerepo.com/uses/markdown-it)**: 2 files - **markdown-it-anchor**: 2 files - **markdown-it-emoji**: 2 files ### Validation - **[Ajv](https://seerepo.com/uses/ajv)**: 2 files ### Testing - **Chai**: 101 files - **sinon**: 14 files - **jsdom**: 1 file ### Tools - **vscode-languageserver-protocol**: 9 files - **yargs**: 3 files - **@parcel/watcher**: 2 files ### Other - **inversify**: 264 files - **@lumino/messaging**: 8 files - **vscode-uri**: 7 files - **Socket.io**: 4 files - **cookie**: 2 files - **fs-extra**: 2 files - **fuzzy**: 2 files - **iconv-lite**: 2 files - **Lodash**: 2 files - **lodash.throttle**: 2 files - **msgpackr**: 2 files - **p-debounce**: 2 files - **reflect-metadata**: 2 files - **socket.io-client**: 2 files - **temp**: 2 files - **ws**: 2 files - **async-mutex**: 1 file - **fast-json-stable-stringify**: 1 file - **jschardet**: 1 file - **uuid**: 1 file ## Support (packages/debug) ### Testing - **Chai**: 8 files ### Other - **p-debounce**: 7 files - **reflect-metadata**: 2 files - **jsonc-parser**: 1 file ## Support (packages/dev-container) ### Testing - **Chai**: 6 files ### Other - **jsonc-parser**: 1 file ## Support (packages/editor-preview) ### Testing - **Chai**: 1 file ## Support (packages/editor) ### Testing - **Chai**: 3 files ## Backend (packages/electron) ### Data - **electron-store**: 2 files ## Support (packages/electron) ### The base - **[Electron](https://seerepo.com/uses/electron)**: 3 files ### Other - **fix-path**: 1 file ## Support (packages/external-api) ### Testing - **Chai**: 4 files ## Support (packages/file-search) ### Testing - **Chai**: 1 file ### Tools - **@vscode/ripgrep**: 1 file ## Support (packages/filesystem) ### Testing - **Chai**: 15 files - **sinon**: 5 files ### Tools - **vscode-languageserver-textdocument**: 2 files - **ignore**: 1 file - **rimraf**: 1 file ### Other - **temp**: 7 files - **minimatch**: 6 files - **async-mutex**: 3 files - **body-parser**: 1 file - **http-status-codes**: 1 file - **multer**: 1 file - **tar-stream**: 1 file ## Support (packages/getting-started) ### Testing - **Chai**: 2 files ## Support (packages/keymaps) ### Testing - **Chai**: 1 file - **sinon**: 1 file ### Other - **jsonc-parser**: 1 file ## Support (packages/markers) ### Testing - **Chai**: 4 files ### Other - **temp**: 1 file ## Support (packages/memory-inspector) ### Testing - **Chai**: 2 files ### Other - **long**: 9 files ## Support (packages/messages) ### Testing - **Chai**: 2 files ### Other - **ts-md5**: 1 file ## Support (packages/metrics) ### Testing - **Chai**: 2 files ### Deploy - **prom-client**: 1 file ## Support (packages/mini-browser) ### The base - **vhost**: 1 file ### Content - **pdfobject**: 1 file ### Testing - **Chai**: 1 file ### Other - **mime-types**: 1 file ## Backend (packages/monaco) ### Data - **idb**: 1 file ## Support (packages/monaco) ### Testing - **Chai**: 7 files - **sinon**: 1 file ### Tools - **vscode-textmate**: 6 files - **vscode-oniguruma**: 1 file ### Other - **jsonc-parser**: 2 files ## Support (packages/navigator) ### Testing - **Chai**: 7 files - **sinon**: 1 file ### Other - **minimatch**: 1 file ## Support (packages/notebook) ### Content - **[markdown-it](https://seerepo.com/uses/markdown-it)**: 1 file ## Support (packages/output) ### Testing - **Chai**: 2 files ### Other - **p-queue**: 1 file ## Support (packages/plugin-ext-vscode) ### Testing - **Chai**: 3 files - **sinon**: 1 file ## Support (packages/plugin-ext) ### The base - **vhost**: 1 file ### Content - **escape-html**: 1 file ### Testing - **Chai**: 38 files - **sinon**: 1 file ### Tools - **vscode-textmate**: 1 file ### Other - **async-mutex**: 2 files - **jsonc-parser**: 2 files - **reflect-metadata**: 2 files - **Lodash**: 1 file - **mime**: 1 file - **node-pty**: 1 file - **SemVer**: 1 file - **temp**: 1 file ## Support (packages/plugin-metrics) ### Testing - **Chai**: 1 file - **sinon**: 1 file ## Support (packages/plugin-utils) ### Testing - **Chai**: 9 files ### Other - **fs-extra**: 3 files - **jsonc-parser**: 1 file ## Support (packages/preferences) ### Testing - **Chai**: 9 files ### Other - **jsonc-parser**: 3 files - **async-mutex**: 1 file - **fast-deep-equal**: 1 file - **p-debounce**: 1 file ## Support (packages/process) ### Testing - **Chai**: 3 files ### Other - **node-pty**: 2 files - **chalk**: 1 file - **string-argv**: 1 file - **temp**: 1 file ## Support (packages/property-view) ### Testing - **Chai**: 2 files ## Support (packages/remote) ### Testing - **Chai**: 5 files ### Tools - **glob**: 1 file ### Other - **ssh-config**: 3 files - **ssh2**: 2 files - **archiver**: 1 file - **Socket.io**: 1 file - **socket.io-client**: 1 file - **ssh2-sftp-client**: 1 file ## Frontend (packages/scm) ### Interface - **react-textarea-autosize**: 1 file ## Support (packages/scm) ### Testing - **Chai**: 14 files - **chai-string**: 2 files - **sinon**: 1 file ### Other - **diff**: 1 file - **p-debounce**: 1 file - **ts-md5**: 1 file ## Frontend (packages/search-in-workspace) ### Interface - **react-textarea-autosize**: 1 file ## Support (packages/search-in-workspace) ### Testing - **Chai**: 1 file ### Tools - **@vscode/ripgrep**: 2 files ### Other - **minimatch**: 1 file - **temp**: 1 file ## Support (packages/task) ### Testing - **Chai**: 7 files - **sinon**: 1 file ### Other - **p-debounce**: 2 files - **async-mutex**: 1 file - **jsonc-parser**: 1 file - **reflect-metadata**: 1 file ## Support (packages/telemetry) ### Testing - **Chai**: 9 files - **sinon**: 2 files ## Support (packages/terminal-manager) ### Testing - **Chai**: 2 files ## Frontend (packages/terminal) ### Interface - **[xterm](https://seerepo.com/uses/xterm)**: 7 files - **xterm-addon-fit**: 1 file ## Support (packages/terminal) ### Testing - **Chai**: 9 files ### Other - **p-debounce**: 1 file - **reflect-metadata**: 1 file - **temp**: 1 file ## Support (packages/toolbar) ### Other - **jsonc-parser**: 1 file ## Support (packages/variable-resolver) ### Testing - **Chai**: 4 files - **sinon**: 1 file ## Support (packages/vsx-registry) ### Testing - **Chai**: 7 files - **sinon**: 1 file ### Other - **limiter**: 1 file - **luxon**: 1 file - **p-debounce**: 1 file - **SemVer**: 1 file ## Support (packages/workspace) ### Testing - **Chai**: 7 files - **sinon**: 4 files ### Other - **jsonc-parser**: 2 files - **temp**: 2 files ## Other repos with a similar stack - [paperclipai/paperclip](https://seerepo.com/r/paperclipai/paperclip/built): Anthropic, OpenAI, MCP, React, Express, Mermaid, Zod, dompurify, Ajv, xterm · [Compare](https://seerepo.com/compare/eclipse-theia/theia/vs/paperclipai/paperclip) - [cline/cline](https://seerepo.com/r/cline/cline/built): Anthropic, OpenAI, MCP, React, Mermaid, js-yaml, Zod, react-virtuoso, dompurify, react-textarea-autosize · [Compare](https://seerepo.com/compare/cline/cline/vs/eclipse-theia/theia) - [ruvnet/ruflo](https://seerepo.com/r/ruvnet/ruflo/built): OpenAI, Hugging Face, MCP, React, Express, js-yaml, Zod, Ajv, prom-client · [Compare](https://seerepo.com/compare/eclipse-theia/theia/vs/ruvnet/ruflo) - [Mintplex-Labs/anything-llm](https://seerepo.com/r/Mintplex-Labs/anything-llm/built): Anthropic, OpenAI, MCP, React, Express, ollama, react-tooltip, dompurify, markdown-it · [Compare](https://seerepo.com/compare/eclipse-theia/theia/vs/Mintplex-Labs/anything-llm) - [twentyhq/twenty](https://seerepo.com/r/twentyhq/twenty/built): Electron, Anthropic, OpenAI, MCP, React, Express, Zod, dompurify, react-textarea-autosize · [Compare](https://seerepo.com/compare/eclipse-theia/theia/vs/twentyhq/twenty) - [cheaper-inference/OmniRoute](https://seerepo.com/r/cheaper-inference/OmniRoute/built): Electron, MCP, React, Express, js-yaml, Zod, dompurify, Ajv · [Compare](https://seerepo.com/compare/cheaper-inference/OmniRoute/vs/eclipse-theia/theia) ## Frequently asked questions ### What language is theia written in? theia is written in TypeScript, with 648,258 written lines. ### What framework does theia use? theia is built with Electron, React, Express, and vhost. ### What database does theia use? theia stores its data in electron-store. ### What does theia sign people in with? theia signs people in with keytar. ### Does theia use AI? Yes. theia uses AI through Anthropic, OpenAI, @openai/codex-sdk, and ollama. The proof: [packages/ai-anthropic/src/node/anthropic-language-model.ts, line 42](https://github.com/eclipse-theia/theia/blob/30a5482386400715f42b541b4b142fd399ada7f3/packages/ai-anthropic/src/node/anthropic-language-model.ts#L42) ### What services does theia use? theia uses Hugging Face, MCP, and idb. The proof: [packages/ai-hugging-face/src/node/huggingface-language-model.ts, line 28](https://github.com/eclipse-theia/theia/blob/30a5482386400715f42b541b4b142fd399ada7f3/packages/ai-hugging-face/src/node/huggingface-language-model.ts#L28) ### Does theia have tests? Yes. theia has 773 test files and is tested with Chai, sinon, Puppeteer, Mocha, jsdom, and chai-string. ### Which repos have a stack like theia's? The ones that share most of its stack: paperclipai/paperclip, cline/cline, and ruvnet/ruflo. ## What is your repo built with? Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.