Gemini Sub-Agent

# gemini-sub-agent

Use Google Gemini (via subscription, $0 API cost) as a sub-agent inside OpenClaw workflows.

Setup

Run once on a fresh machine: ```bash bash skills/gemini-sub-agent/scripts/setup.sh ```

1. Then authenticate (headless VPS flow):
2. On VPS: `gcloud auth application-default login --no-browser` → copy the `--remote-bootstrap` URL
3. On laptop: `gcloud auth application-default login --remote-bootstrap="<URL>"` → copy the `localhost:8085` output
4. Paste `localhost:8085` output back into VPS prompt
5. Complete Gemini CLI OAuth: `GOOGLE_GENAI_USE_GCA=true gemini -p "hello"` → paste auth code

Credentials are cached indefinitely and auto-refresh.

Available Models

| Model | Use for | |---|---| | `gemini-3.1-pro-preview` | Default — latest flagship, best reasoning | | `gemini-2.5-pro` | Stable coding tasks, multi-file edits | | `gemini-3-flash-preview` | Fast summaries, quick Q&A | | `gemini-3-pro-preview` | Previous gen Pro, reliable fallback | | `gemini-2.5-flash` | Lightweight fallback |

Usage Patterns

1. Simple text task (exec) ```bash ask-gemini "your prompt here" ask-gemini -m gemini-2.5-pro "your prompt" ```

2. Pipe large content (long-context) ```bash cat large_file.txt | ask-gemini "summarize this in 5 bullets" cat report.md | ask-gemini "extract all action items" ```

3. Agentic coding (replaces Swift/Sonnet for 30-200 line tasks) ```bash cd /path/to/project GOOGLE_GENAI_USE_GCA=true gemini -m gemini-2.5-pro -y -p "write a script that..." ``` `-y` = yolo mode (auto-approves all file writes and shell commands). Gemini reads/writes files autonomously.

4. Pipe files directly into agentic session ```bash cat existing_script.py | GOOGLE_GENAI_USE_GCA=true gemini -m gemini-2.5-pro -y -p "refactor this to add error handling" ```

Routing Rules (when to use Gemini vs others)

| Task | Use | |---|---| | Text, analysis, summarization | `ask-gemini` | | Medium coding (30–200 lines) | Gemini agentic (`-y`) instead of Swift/Sonnet | | Large file / long-context | `ask-gemini` (1M token window) | | Web search / research | Research agent (Grok) — Gemini has no web access | | Multi-agent orchestration | OpenClaw native (sessions_spawn) | | Complex architecture / debugging | Codex (Opus) — escalate if Gemini fails twice |

Escalation

If Gemini returns wrong output twice on the same task → escalate to Swift (Sonnet) or Codex (Opus). Log the failure in `failures/hot_antipatterns.md` with the task type.

Scripts

• `scripts/setup.sh` — Full install: gemini-cli + gcloud + ask-gemini wrapper
• `scripts/ask-gemini` — The wrapper script itself (copy to `/usr/local/bin/`)