Junmo KimandGitHub 0160da4bb5 fix(gemini): switch model mid-session via ACP RPC (#543)
When a user selects a different Gemini model from the Web UI mid-session,
the running `gemini --experimental-acp` process kept using the model it
was launched with. The Web UI reflected the new selection, but the next
response was still produced by the original model.

Changes:
- AcpSdkBackend: add `setModel` wrapping the `session/set_model` RPC.
  Errors propagate as standard rejections, matching every other
  `sendRequest` call in this file.
- geminiRemoteLauncher: detect model changes between turns and call
  `backend.setModel` on the live ACP session — no process restart, no
  MCP reload. If the running gemini-cli build returns method-not-found,
  the launcher learns once, surfaces a single advisory message, then
  silently honors the previous model for the rest of the session.
- AgentSessionBase.pushKeepAlive: small helper used by runGemini to
  broadcast new config to the hub immediately after `set-session-config`.
- Both layers serialize the switch — the launcher attempts `setModel`
  only between batches, and `AcpSdkBackend.setModel` defensively awaits
  `waitForResponseComplete()` before issuing the RPC.

Tests:
- New `geminiRemoteLauncher.test.ts` covers: setModel called between
  turns when the model differs; not called when unchanged; the
  method-not-found capability latch; transient errors continue with the
  previous model; setModel is serialized after the prior prompt.
- `runGemini.test.ts` asserts pushKeepAlive fires from the
  `set-session-config` handler.
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HAPI

Run official Claude Code / Codex / Gemini / OpenCode 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, Gemini, OpenCode—different models, 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 hapi runner start --workspace-root <path>: browse a scoped file tree from the web and start sessions in any subdirectory.

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

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.

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