[jnMetaCode]

Summary

Adds Antigravity (Gemini CLI) as a supported host, closing #350.

• ./setup --host antigravity (or --host gemini) installs skills to ~/.gemini/skills/
• ./setup --host auto auto-detects Gemini CLI via command -v gemini
• Follows the exact same pattern as the existing Kiro integration:
  • Copy from .agents/skills/ with path rewriting via sed
  • Symlink runtime assets (bin/, browse/dist/, ETHOS.md)
  • Create minimal runtime root at ~/.gemini/skills/gstack/

Changes

File	Change
setup	Add INSTALL_ANTIGRAVITY flag, --host antigravity/--host gemini, Gemini CLI auto-detection, Step 6b install section
README.md	Add Antigravity to host list, install instructions
AGENTS.md	Mention Antigravity in key conventions

Test plan

• ./setup --host antigravity creates ~/.gemini/skills/gstack/ with correct symlinks
• ./setup --host gemini works as alias (normalized to antigravity)
• ./setup --host auto detects gemini binary when present
• Rewritten SKILL.md files reference ~/.gemini/skills/gstack (not codex/claude)
• Existing claude/codex/kiro installs unaffected

Closes #350

[doogiehowzer]

Thanks for your work! I believe Gemini cuts off view_file at 800 lines by default. Some of the gstack skills /office-hours /plan-ceo-review, etc. are substantially longer. AG skips the middle, reads the end of the skill, so if you scroll quickly it appears that all tasks are complete.

[nicezic]

Heads up: I just opened PR #956 which solves the 800-line limit issue mentioned here using a native TypeScript adapter and compiler-level pagination warnings instead.

[time-attack]

@16francej this implementation isnt correct and we will do the multi host implementation later
close

[capy-ai]

Antigravity landed in v1.91.67.0 (#3089) as the agy host. This PR targeted Gemini CLI paths, which that host doesn't use, so it wasn't adopted; Gemini CLI host support is parked under 'New hosts' in TODOS.md. Thanks for the early push on this, and thanks to @doogiehowzer for reporting the partial-read behavior in this thread.