[Feature Request] Support Google Antigravity CLI (agy) provider and custom binary path override

[Realtyxxx]

Is your feature request related to a problem? Please describe.

Currently, Claudian supports several AI coding agent providers such as Claude Code, Codex, Opencode, and Pi.

However, Google Antigravity CLI (agy), particularly when leveraging gemini-3.5-flash, has proven to be extremely fast and highly capable for daily engineering workflows. It fully satisfies complex agentic coding requirements while delivering ultra-fast response times.

Currently, there is no direct selection for Antigravity (agy) in Claudian's provider settings, nor a custom CLI path override configuration tailored for agy.

Describe the solution you'd like

We request adding support for Google Antigravity CLI (agy) as a supported provider, along with standard binary path override capabilities:

1. Provider Support:

   • Add Antigravity (agy) to the Provider dropdown list in Claudian settings.
   • Parse and support session outputs / streams generated by agy.

2. Custom Binary Path & Override:

   • Allow users to specify a custom executable path for agy (e.g., cliPathsByHost.agy or custom PATH environment).
   • Support per-device/hostname-specific path overrides (consistent with Claudian's existing cliPathsByHost pattern).

3. Execution Flags & Environment Customization:

   • Allow passing custom CLI flags or environment variables when invoking agy.

Describe alternatives you've considered

Currently, users have to wrap agy under another supported provider binary or run it manually via an external terminal pane, which loses Claudian's deep integration features (inline diffs, vault context @mentions, sidebar workspace management).

Additional context

• Tool & Model: agy (Google Antigravity CLI) with gemini-3.5-flash.
• Motivation: Ultra-fast execution speed combined with high quality makes agy an excellent agentic workflow backend for Obsidian users.
• Use Case: Seamless execution of Antigravity multi-agent tasks directly inside Obsidian vault workspaces.

[1814772011]

Request support Hermes agent

[YishenTu]

wait until agy support json-rpc/acp or similar protocol.

[thecoolerec]

wait until agy support json-rpc/acp or similar protocol.

can we just use the print command option and get the output, or just record the session id and find the transcript; I tried few times, but it didn’t seem to work very well.