ZEM17/dsh-subagent-agy

Delegate tasks to Google Antigravity CLI (agy) — a separate Gemini-powered coding agent on your machine — straight from DeepSeek Harness. No Gemini API key is involved: agy authenticates through your Antigravity login (system keyring / Google Sign-In).

中文版见 README.zh.md · Source: github.com/ZEM17/dsh-subagent-agy

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Installation

Requirements

1. agy installed: irm https://antigravity.google/cli/install.ps1 | iex (Windows). The plugin locates it automatically (PATH → AGY_BIN → %LOCALAPPDATA%\agy\bin → ~/.local/bin → ~/.gemini/bin → ~/go/bin).
2. agy logged in once: run agy in a terminal and complete the sign-in. If a run hits "authentication required", the plugin pops the interactive login window automatically.
3. DeepSeek Harness with the standard web profile (it ships dsh-subagent, dsh-subprocess, dsh-tools, dsh-jobs).

Install the plugin

From GitHub (recommended):

dsh plugin --profile web add github:ZEM17/dsh-subagent-agy

From a tarball: download dsh-external-dsh-subagent-antigravity-0.1.0.tgz from the releases page, then:

dsh plugin --profile web add /path/to/dsh-external-dsh-subagent-antigravity-0.1.0.tgz

That's it — no restart needed. The model in any session can now use the antigravity tools.

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Usage

The model calls the tools automatically when you ask for it; you can also prompt it explicitly:

Surface	Name	What it does
new task	antigravity	delegate a self-contained task to agy (fresh conversation); returns a task key
follow-up	antigravity_followup	continue a previous agy conversation via its task key — full context carries over
login	antigravity_login	pop the interactive agy login window (also opens automatically on auth failures)

Example prompts:

"Use agy to rewrite the README of D:\projects\my-project and list the changes."

"用 antigravity 优化这个项目的页面" (in a Chinese session)

Image analysis

agy's model is multimodal — put an image path in the prompt and it will describe or analyze the image:

"Use agy to describe this image: C:\projects\design\mockup.png"

"用 antigravity 识别这张图片：C:\projects\screenshots\ui.png"

Images inside the session workspace work directly; images elsewhere need the directory in the tool's dirs parameter (or the addDirs config).

• Tasks targeting files outside the session workspace need the target directory: the tool takes a dirs parameter (the model passes it when you give it the path).
• Long tasks: the model uses background: true for long jobs — it keeps you posted on live progress and reports the final result when done.
• Continue a task: tell the model to continue using the task key from a previous call.

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Configuration

All fields are optional; sane defaults are shown. Configure through the plugin's settings section (e.g. $DSH_HOME/settings.yaml):

dsh-subagent-antigravity:
  model: gemini-3.1-pro-high   # agy models; empty = agy default
  effort: high                 # low | medium | high
  printTimeoutMs: 300000       # foreground ceiling (5 min)
  backgroundTimeoutMs: 3600000 # background ceiling (1 h)
  skipPermissions: true        # auto-approve agy tool calls (headless needs it)
  addDirs: []                  # absolute dirs added to the agy workspace (--add-dir)
  proxy: ""                    # proxy URL; falls back to AGY_PROXY, then ~/.dsh/agy-proxy.txt

Field	Default	Meaning
providerName	antigravity	registry name on ctx.subagents
toolName	antigravity	new-task tool name
followupToolName	antigravity_followup	follow-up tool name
loginToolName	antigravity_login	login-window tool name
command	agy	executable (PATH name or absolute path)
model	''	--model <slug> (see agy models); empty = agy default
effort	''	--effort low|medium|high; empty = omit
agent	''	--agent <name>; empty = omit
printTimeoutMs	300000	foreground run ceiling (--print-timeout)
backgroundTimeoutMs	3600000	background run ceiling (1 h)
watchdogMarginMs	60000	force-kill margin after the ceiling if agy hangs
skipPermissions	true	--dangerously-skip-permissions (auto-approve agy tool calls)
sandbox	false	--sandbox (agy terminal-sandbox restrictions)
avoidBrowser	true	append a note telling agy NOT to use headless browser tools (they can hang on some machines)
avoidLargeReads	true	append a note telling agy to inspect files > 1 MB via grep/sed instead of its read tool (4 MB cap)
outputFormat	json	wire format (json or text); background prefers stream-json automatically
extraArgs	[]	raw extra argv appended after generated flags
cwd	''	working-directory override; empty = the session workspace
addDirs	[]	absolute dirs added to the agy workspace (--add-dir) — required for targets outside the session workspace
env	{}	environment overlay merged after the harness credential scrub
proxy	''	proxy URL; falls back to AGY_PROXY env, then ~/.dsh/agy-proxy.txt (re-read per call)
registryPath	''	follow-up registry file; empty = ~/.dsh/agy-conversations.json
disposeGraceMs	5000	tree-termination grace (SIGTERM → SIGKILL)
autoLoginWindow	true	on auth failure, pop the interactive login window automatically
loginWindowMinimized	true	launch the login window minimized (taskbar icon only)

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How it works (short version)

Each task spawns a fresh agy -p <task> process in the session workspace and returns the final answer. Runs use --output-format json, whose reply carries agy's conversation_id; the plugin records it in a durable registry (~/.dsh/agy-conversations.json), and antigravity_followup resumes the same conversation via --conversation <id>. Background runs use stream-json for live progress and register with DSH's jobs system (job_output / job_kill). A local watchdog terminates hung runs, and all timeouts interrupt: nothing ever waits forever.

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Troubleshooting

Symptom	Fix
authentication required	complete the sign-in in the popped login window (or call antigravity_login), then retry
User location is not supported	set a proxy (proxy config or ~/.dsh/agy-proxy.txt)
timeout waiting for response	raise printTimeoutMs / backgroundTimeoutMs, or use background: true
agy exited 0 but produced no stdout	known agy non-TTY bug; --output-format json avoids it (default) — upgrade agy if it persists
cannot resolve "agy"	set AGY_BIN to the agy executable
task hangs on a browser tool	avoidBrowser (default on) prevents it; set false only when a browser preview is genuinely needed
file size (…) exceeds limit	agy's read tool caps at 4 MB; avoidLargeReads (default on) tells agy to use grep/sed instead — or slim the file

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Development

bash scripts/build.sh            # junction-link @deepseek-ai deps from the DSH runtime, then tsc src/ → lib/
npm run selftest                 # offline checks: agy presence, flag probe, registry round trip
npm run selftest:e2e             # + live PONG round trip and follow-up (needs an agy login)

Dev workflow on a local DSH (super-injector): dev_build_plugin (build + pack) → dev_inject_plugin (runtime injection, no restart); iterate with dev_build_plugin → dev_reload_package.