Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add dalroot/agentic-seo --skill robotsgit clone --depth 1 https://github.com/dalroot/agentic-seoWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/dalroot/agentic-seo/robots)<a href="https://agentmods.dev/skills/dalroot/agentic-seo/robots"><img src="https://agentmods.dev/badge/skills/dalroot/agentic-seo/robots/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/dalroot/agentic-seo/robots"><img src="https://agentmods.dev/badge/skills/dalroot/agentic-seo/robots.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00091 | $0.01960 |
| Opus 5.5 | $0.00036 | $0.00784 |
| Sonnet 5.5 | $0.00018 | $0.00392 |
| Haiku 4.5 | $0.00009 | $0.00196 |
Grade A, and why
robots-txt scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured today.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 142 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SEO Technical: robots.txt
Guides configuration and auditing of robots.txt for search engine and AI crawler control.
When invoking: On first use, if helpful, open with 1–2 sentences on what this skill covers and why it matters, then provide the main output. On subsequent use or when the user asks to skip, go directly to the main output.
Scope (Technical SEO)
- Robots.txt: Configure Disallow/Allow, Sitemap, Clean-param; audit for accidental blocks
- Crawler access: Path-level crawl control; AI crawler allow/block strategy
- Differentiation: robots.txt = crawl control (who accesses what paths); noindex = index control (what gets indexed). See indexing for page-level exclusions.
Initial Assessment
Check for project context first: If .claude/project-context.md or .cursor/project-context.md exists, read it for site URL and indexing goals.
Identify:
- Site URL: Base domain (e.g.,
https://example.com) - Indexing scope: Full site, partial, or specific paths to exclude
- AI crawler strategy: Allow search/indexing vs. block training data crawlers
Best Practices
Purpose and Limitations
| Point | Note |
|---|---|
| Purpose | Controls crawler access; does NOT prevent indexing (disallowed URLs may still appear in search without snippet) |
| Advisory | Rules are advisory; malicious crawlers may ignore |
| Public | robots.txt is publicly readable; use noindex or auth for sensitive content. See indexing |
Crawl vs Index vs Link Equity (Quick Reference)
| Tool | Controls | Prevents indexing? |
|---|---|---|
| robots.txt | Crawl (path-level) | No—blocked URLs may still appear in SERP |
| noindex (meta / X-Robots-Tag) | Index (page-level) | Yes. See indexing |
| nofollow | Link equity only | No—does not control indexing |
When to Use robots.txt vs noindex
| Use | Tool | Example |
|---|---|---|
| Path-level (whole directory) | robots.txt | Disallow: /admin/, Disallow: /api/, Disallow: /staging/ |
| Page-level (specific pages) | noindex meta / X-Robots-Tag | Login, signup, thank-you, 404, legal. See indexing for full list |
| Critical | Do NOT block in robots.txt | Pages that use noindex—crawlers must access the page to read the directive |
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- today First seen · 142 lines · 91 tokens per session scan A d7dac75c1e95
robots-txt is a skill published in the GitHub repository dalroot/agentic-seo (25 stars, last pushed 6d ago), licensed MIT. It adds 91 tokens to every session and 1,960 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-26.
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