Composer attachment tray wired end to end: "+" bottom sheet (photo library / camera / files), upload-on-pick against POST upload (JSON+base64), per-chip uploading -> ready/failed states with retry and best-effort delete-on-remove, AttachmentMetadata riding SendMessageRequest and the optimistic row so user bubbles thumbnail instantly, and a UserTextBlockView upgrade decoding wire previewUrl data URLs (web-sent messages thumbnail too). Mobile-data compression policy (differs from web, which uploads originals): recompressible images over 4 MB downscale to 2048 px JPEG q85 (filename swaps to .jpg); GIF/SVG/non-images keep originals; hard 50 MB reject with a notice, plus a capped read guarding unknown-size picks. previewUrl embeds a <=512 px JPEG thumb instead of the web's full-size data URL to keep send bodies small. Simplifications noted in KDoc: attachments do not persist in drafts v1 (holder onCleared discards un-sent uploads after best-effort deletes); inactive sessions fail the upload chip until a text send auto-resumes. Scheduled sends guard the wire constraint (scheduledAt excludes attachments) with a loud check. Seam: ChatSessionApi now extends AttachmentUploadApi (HapiApi methods gain override); camera captures use a FileProvider cache scratch, rememberSaveable across rotation. Tests: pure policy decisions (plan/sample-size/filenames/data URLs), controller state machine incl. mid-upload removal orphan cleanup, VM send/retry/refusal flows with metadata assertions, MockWebServer wire shapes for upload + delete. Full gate green (protocol/data/app tests + assembleDebug).
HAPI
Run official Claude Code / Codex / Cursor Agent / Grok Build / OpenCode / Kimi / Copilot / Antigravity / Pi sessions locally and control them remotely through a Web / PWA / Telegram Mini App.
Why HAPI? HAPI is a local-first alternative to Happy. See Why Not Happy? for the key differences.
Features
- Seamless Handoff - Work locally, switch to remote when needed, switch back anytime. No context loss, no session restart.
- Native First - HAPI wraps your AI agent instead of replacing it. Same terminal, same experience, same muscle memory.
- AFK Without Stopping - Step away from your desk? Approve AI requests from your phone with one tap.
- Your AI, Your Choice - Claude Code, Codex, Cursor Agent, Grok Build, OpenCode, Kimi, Copilot, Antigravity, Pi—different agents, one unified workflow.
- Terminal Anywhere - Run commands from your phone or browser, directly connected to the working machine.
- Voice Control - Talk to your AI agent hands-free using the built-in voice assistant.
- Workspace Browser - Opt-in via one or more
hapi runner start --workspace-root <path>flags: browse scoped file trees from the web and start sessions in allowed subdirectories.
Demo
https://github.com/user-attachments/assets/38230353-94c6-4dbe-9c29-b2a2cc457546
Getting Started
npx @twsxtd/hapi hub --relay # start hub with E2E encrypted relay
npx @twsxtd/hapi # run claude code
hapi server remains supported as an alias.
The terminal will display a URL and QR code. Scan the QR code with your phone or open the URL to access.
The relay uses WireGuard + TLS for end-to-end encryption. Your data is encrypted from your device to your machine.
For self-hosted options (Cloudflare Tunnel, Tailscale), see Installation
Docs
Native apps (iOS / Android)
Fully native SwiftUI and Kotlin Compose clients are in development under ios/ and android/. They pair with your hub by scanning the same terminal QR code as the web app, and follow the same protocol — see the client contract docs.
Build from source
bun install
bun run build:single-exe
Credits
HAPI means "哈皮" a Chinese transliteration of Happy. Great credit to the original project.