{"slug": "antigravity-seo-go-engine-and-token-efficient-seo-audits-for-antigravity-cli", "title": "antigravity-seo: Go engine and token-efficient SEO audits for Antigravity CLI", "summary": "Developer Angelotc released antigravity-seo, a Go-based SEO and Generative Engine Optimization suite for Google Antigravity that replaces Python/Playwright runtimes with a single Go binary called seo-engine. The project claims 85–90% cost savings on full site audits versus claude-seo with Claude Opus 5, citing Gemini 3.8 Flash pricing of $0.75/$3.75 per 1M tokens against Opus 5's $5.00/$25.00 per 1M, and offers 21 Antigravity skills plus native search_web and read_url_content grounding. The suite installs to ~/.gemini/config/plugins/antigravity-seo and includes commands for headers, audit, page, report, schema, images, content, hreflang, llms.txt, and sitemap checks.", "body_md": "An SEO and Generative Engine Optimization (GEO) suite for **Google Antigravity**, powered by Go.\n\nNote\n\n**Lineage**: Inspired by [`claude-seo`](https://github.com/AgriciDaniel/claude-seo) by Daniel Agrici. Antigravity SEO replaces Python/Playwright runtimes with a single Go binary (`seo-engine`) and native agent tools (` search_web`, `read_url_content`).\n\n| Dimension | claude-seo + Claude Opus 5 | antigravity-seo + Gemini 3.8 Flash | Advantage | \n|---|---|---|---|\n| **Input / Output Token Cost** | $5.00 / $25.00 per 1M | **$0.75 / $3.75 per 1M** | **6.7x cheaper** | \n| **Single Page Audit** (~50k in / 10k out) | ~$0.50 | **~$0.075** | **~85% savings** | \n| **Full Site Audit** (20 pages, ~400k in / 80k out) | **~$4.00 – $8.00+** | **~$0.60** | **~85% – 90% savings** | \n| **Multi-Agent Swarm Crawls** | Not supported (single model tier) | **~$0.12 – $0.20** (via`flash_lite` ) | **~25x – 40x cheaper** | \n| **Live SERP & Crawl Data** | Optional paid SaaS MCPs (DataForSEO, Firecrawl, Ahrefs) | ✅ **Native `search_web` & Common Crawl** | **Zero paid subscriptions** | \n| **Engine Runtime** | Python venv, pip dependencies, Playwright | ✅ **Single Go binary (`seo-engine`)** | **Zero dependencies, 10ms startup** | \n| **Google Search Console** | External Node/Python scripts | ✅ **Native RSA JWT exchange** | **Built-in auth & queries** | \n\n*Pricing based on September 2026 rates. Multi-agent crawls fan out to `flash_lite` subagents for penny-scale execution.*\n\n1. **Token Economics** : Claude Opus 5 thinking traces bill at $25/1M, making multi-page audits costly ($4–$8+). Gemini 3.8 Flash ($0.75 / $3.75) cuts costs by 85–90% (~$0.60), while`flash_lite` subagent swarms handle raw crawling for <$0.15.\n2. **Zero-Dependency Go Engine** :`seo-engine` is a standalone binary with 10ms execution, eliminating Python venvs, pip modules, and headless browser daemons.\n3. **Native Grounding** : Live Google SERP analysis and markdown extraction use Antigravity's built-in`search_web` and`read_url_content` without paid third-party MCPs.\n4. **Built-in GSC & Backlinks** : Direct RSA/PKCS8 JWT authentication for Google Search Console and keyless Common Crawl CDX index lookups.\n5. **Native A4 PDF Reports** : Built-in PDF report generation (`--pdf` ) via`fpdf` matching executive print standards with zero external dependencies.\n\n``` php\nflowchart LR\n    User([User]) --> Skills[\"21 Antigravity Skills\\nAudit • Schema • Content • GEO • Backlinks\"]\n    Skills --> Engine[\"Go Engine (seo-engine)\\nFast audits, crawler, GSC, & PDF generation\"]\n    Skills --> Native[\"Native Grounding\\nsearch_web & read_url_content\"]\n    Engine --> Output[\"Deliverables\\nCLI • JSON • Enterprise A4 PDF\"]\n```\n\n**macOS / Linux:**\n\n```\ncurl -fsSL https://raw.githubusercontent.com/angelotc/antigravity-seo/main/install.sh | bash\n```\n\n**Windows (PowerShell):**\n\n```\nirm https://raw.githubusercontent.com/angelotc/antigravity-seo/main/install.ps1 | iex\n```\n\nInstalls the plugin to `~/.gemini/config/plugins/antigravity-seo` and symlinks `seo-engine` into your PATH.\n\n```\ngit clone https://github.com/angelotc/antigravity-seo.git\ncd antigravity-seo\nbash install.sh          # On Windows: powershell -ExecutionPolicy Bypass -File install.ps1\n```\n\nVerify anytime with:\n\n```\nseo-engine doctor\n```\n\n| Command | Purpose | \n|---|---|\n| `headers <url>` | HTTP status, redirect chains, X-Robots-Tag, TTFB | \n| `audit <url>` | On-page technical + schema audit | \n| `page <url>` | Deep audit (technical + schema + images + content + hreflang) | \n| `report <url>` | Executive HTML or native A4 PDF report ( `--pdf` ) | \n| `schema <url>` | JSON-LD validation vs Google Rich Results (14+ types) | \n| `images <url>` | Alt coverage, dimensions, CLS, formats, lazy loading | \n| `content <url>` | Word count, headings, E-E-A-T signals, answer blocks | \n| `hreflang <url>` | BCP47 codes, x-default, self-reference, duplicates | \n| `llms <url>` | `/llms.txt` and`/llms-full.txt` AI discovery audit | \n| `sitemap <url>` | Sitemap validation (or `sitemap generate <url>` ) | \n| `robots <url>` | Robots.txt directives and AI crawler access policies | \n| `drift <url>` | Change monitoring: `baseline` ,`compare` ,`history` | \n| `backlinks <domain>` | Free Common Crawl link graph and domain captures | \n| `gsc query\\|inspect` | Google Search Console Search Analytics and URL Inspection | \n| `psi <url>` /`crux <url>` | PageSpeed Insights and Chrome UX Report field data | \n| `indexnow <url...>` | Instant submission to Bing, Yandex, Seznam, and Naver | \n\nAll commands support `--json`. Core audit features are 100% keyless.\n\n- **Orchestration** :`seo` ,`seo-audit` ,`seo-page`\n- **Technical & Content** :`seo-technical` ,`seo-content` ,`seo-schema` ,`seo-geo` ,`seo-images` ,`seo-hreflang` ,`seo-drift` ,`seo-backlinks`\n- **Search & Local** :`seo-local` ,`seo-maps` ,`seo-ecommerce` ,`seo-cluster` ,`seo-sxo`\n- **Strategy** :`seo-plan` ,`seo-programmatic` ,`seo-competitor-pages` ,`seo-content-brief` ,`seo-flow`\n\nThe plugin also includes a **PostToolUse schema hook** that automatically validates JSON-LD files upon write, blocking deprecated schemas and placeholder text.\n\nThe engine and skills run 100% natively via standard shell execution (`seo-engine <command> [options] <url> --json`) with zero MCP middleware. Simply ensure `seo-engine` is in your `$PATH` (or run `install.sh`).\n\n- **Antigravity** : Native execution via`run_command`\n- **OpenCode** : Register skills path in`opencode.json` :\n\n```\n\"skills\": {\n  \"paths\": [\"~/.gemini/config/plugins/antigravity-seo/skills\"]\n}\n```\n\n- **Claude Code** : Symlink or copy skills into`~/.claude/skills/`\n- **Codex / Cursor / Aider** : Invoke`seo-engine` directly via the terminal / bash tool\n\n## Upstream Parity vs [claude-seo](https://github.com/AgriciDaniel/claude-seo)\n\n| Upstream Capability | Antigravity SEO Implementation | \n|---|---|\n| Runtime & Doctor | ✅ Pure Go runtime; zero Python venv | \n| Audits (Technical, Schema, Content, Images, Hreflang) | ✅ Fast engine commands + 21 specialized skills | \n| Sitemap Generator | ✅ Built-in crawler: `sitemap generate` | \n| Schema Quality Gate | ✅ PostToolUse hook (bash + PowerShell) | \n| Drift Tracking | ✅ Zero-dependency JSON snapshot store | \n| Search Console (GSC) | ✅ Native RSA JWT service account exchange | \n| Backlink Analysis | ✅ Free Common Crawl CDX index query | \n| PDF Reporting | ✅ Pure Go A4 PDF engine ( `fpdf` ), zero external tools | \n| SERP Grounding | ✅ Native Antigravity `search_web` (no paid MCP accounts needed) | \n| SPA JavaScript Rendering | 🔁 Delegated to Antigravity's native browser tools | \n\nMIT — see [LICENSE](https://github.com/angelotc/antigravity-seo/blob/main/LICENSE).", "url": "https://wpnews.pro/news/antigravity-seo-go-engine-and-token-efficient-seo-audits-for-antigravity-cli", "canonical_source": "https://github.com/angelotc/antigravity-seo", "published_at": "2026-09-24 04:51:09+00:00", "updated_at": "2026-09-24 05:01:21.184998+00:00", "lang": "en", "topics": ["generative-engine-optimization", "ai-search", "ai-tools", "developer-tools", "ai-agents"], "entities": ["antigravity-seo", "Google Antigravity", "seo-engine", "Angelotc", "claude-seo", "Daniel Agrici", "Gemini 3.8 Flash", "Claude Opus 5"], "also_reported_by": [], "alternates": {"html": "https://wpnews.pro/news/antigravity-seo-go-engine-and-token-efficient-seo-audits-for-antigravity-cli", "markdown": "https://wpnews.pro/news/antigravity-seo-go-engine-and-token-efficient-seo-audits-for-antigravity-cli.md", "text": "https://wpnews.pro/news/antigravity-seo-go-engine-and-token-efficient-seo-audits-for-antigravity-cli.txt", "jsonld": "https://wpnews.pro/news/antigravity-seo-go-engine-and-token-efficient-seo-audits-for-antigravity-cli.jsonld"}}