blog-seo-check
Automated post-writing SEO validator providing a checklist and actionable fixes for blog content.
Install
mkdir -p .claude/skills/blog-seo-check && curl -L -o skill.zip "https://agentskills.codes/api/skills/download/12483" && unzip -o skill.zip -d .claude/skills/blog-seo-check && rm skill.zipInstalls to .claude/skills/blog-seo-check
Activation
This is the description your AI agent reads to decide when to run this skill — the better it matches your request, the more reliably it fires.
Post-writing SEO validation with pass/fail checklist covering title tag length and keyword placement, meta description quality, heading hierarchy and keyword density, internal/external link audit with anchor text analysis, canonical URL verification, Open Graph meta tags (og:title, og:description, og:image), Twitter Card validation, URL structure optimization, and image alt text presence. Produces prioritized fix list with specific recommendations. Use when user says "seo check", "check seo", "validate seo", "blog seo", "seo validation", "on-page seo", "title tag check", "meta description check", "heading check", "link audit".Key capabilities
- →Validate title tag length and keyword placement
- →Assess meta description quality including statistics and call to action
- →Audit heading hierarchy for single H1 and no skipped levels
- →Analyze internal and external links for count, anchor text, and reachability
- →Verify canonical URL format and consistency
How it works
The skill reads a blog post, extracts its content and metadata, and then performs a series of checks against SEO best practices for title, meta description, headings, links, and URLs, generating a report with specific fixes.
Inputs & outputs
When to use blog-seo-check
- →Check SEO for blog post
- →Validate metadata
- →Audit link structure
About this skill
Blog SEO Check: Post-Writing Validation
Runs a comprehensive on-page SEO validation against a completed blog post and generates a pass/fail checklist with specific fixes for each failure. Designed to run after writing - catches issues before publishing.
Workflow
Step 1: Read Content
Read the target file and extract:
- Frontmatter - title, description, date, lastUpdated, author, tags, canonical, og:image, slug/URL
- Heading structure - H1, H2, H3 hierarchy with full text
- Links - All internal and external links with anchor text
- Meta tags - OG tags, Twitter Card tags, canonical URL
- Body content - Full text for keyword and structural analysis
If the user provides a URL instead of a file path, use WebFetch to retrieve the page and extract the relevant elements.
Step 2: Title Tag Validation
| Check | Pass Criteria |
|---|---|
| Character count | 40-60 characters (no truncation in SERPs) |
| Keyword placement | Primary keyword in first half of title |
| Power word | Contains at least one power word (e.g., Guide, Best, How, Why, Essential, Proven, Complete) |
| Truncation risk | No critical meaning lost if truncated at 60 chars |
| Uniqueness | Not generic - specific to the content |
Step 3: Meta Description
| Check | Pass Criteria |
|---|---|
| Character count | 150-160 characters |
| Statistic included | Contains at least one specific number or data point |
| Value proposition | Ends with clear reader benefit or value proposition |
| Keyword presence | Primary keyword appears naturally (not stuffed) |
| No keyword stuffing | Keyword appears at most once |
| Call to action | Implies action (learn, discover, find out, see) |
Step 4: Heading Hierarchy
| Check | Pass Criteria |
|---|---|
| Single H1 | Exactly one H1 tag (the title) |
| No skipped levels | H1 -> H2 -> H3, never H1 -> H3 or H2 -> H4 |
| Keyword in headings | Primary keyword in 2-3 headings (natural, not forced) |
| Question format | 60-70% of H2 headings are questions |
| H2 count | 6-8 H2 sections for a standard blog post |
| Heading length | Each heading under 70 characters |
Step 5: Internal Links
| Check | Pass Criteria |
|---|---|
| Link count | 3-10 internal links per post |
| Anchor text | Descriptive (not "click here" or "read more") |
| Bidirectional | Check if linked pages also link back (flag if not) |
| No orphan status | Post links to at least 3 other pages on the site |
| Link distribution | Links spread across the post, not clustered |
| No self-links | Post does not link to itself |
Use Grep and Glob to scan the project for existing blog content and verify bidirectional linking where possible.
Step 5.5: Link Deduplication
| Check | Pass Criteria |
|---|---|
| No duplicate URLs | Each URL appears at most once in body content |
| Best instance kept | If duplicates exist, keep the one with most descriptive anchor text |
| Navigation exempt | Header/footer nav links don't count toward body dedup |
| Fragment normalization | URLs with different #fragments treated as same URL |
For each duplicate found:
- Normalize URLs (strip trailing slashes, query parameters, fragments)
- Score each instance by anchor text descriptiveness (keyword-rich > generic)
- Recommend keeping the highest-scored instance, removing others
- Deduct 1 point per duplicate from SEO Optimization score
Google records 1-2 anchor texts per URL per page (Zyppy 2023). Optimal: link to same URL once in body content; 5-10 internal links per 2,000 words; max ~50 total links per page.
Step 6: External Links
| Check | Pass Criteria |
|---|---|
| Source tier | Links to tier 1-3 sources only (authoritative, not SEO blogs) |
| Broken links | Use WebFetch to verify top external links are reachable |
| Rel attributes | External links have appropriate rel attributes (nofollow for sponsored/UGC) |
| Link count | At least 3 external links to authoritative sources |
| No competitor links | Not linking to direct competitors unnecessarily |
FLOW evidence triple (citations)
For every public statistic in the post, verify all three components:
- Year anchor appears in prose ("In 2026," or "As of Q1 2026,") BEFORE the statistic, not buried in parentheses.
- Inline citation names the publisher AND the document title (or report name).
- Source block at the bottom of the post includes the URL plus
retrieved YYYY-MM-DDfor each cited source.
Posts that fail any of the three either drop the unverifiable claim or replace it with a verified alternative. See skills/blog/references/flow-alignment.md. For a one-shot prompt-driven check, see /blog flow optimize.
Step 7: Canonical URL
| Check | Pass Criteria |
|---|---|
| Present | Canonical URL is defined in frontmatter or meta tags |
| Correct format | Full absolute URL (https://domain.com/path) |
| Trailing slash | Consistent with site convention (no mixed trailing slashes) |
| Self-referencing | Canonical points to the page itself (unless intentional cross-domain) |
Step 8: OG Meta Tags
| Check | Pass Criteria |
|---|---|
| og:title | Present, matches or complements the title tag |
| og:description | Present, 150-160 characters, compelling for social sharing |
| og:image | Present, 1200x630 minimum dimensions, absolute URL |
| og:type | Set to "article" for blog posts |
| og:url | Present, matches canonical URL |
| og:site_name | Present, matches site/brand name |
Step 9: Twitter Card
| Check | Pass Criteria |
|---|---|
| twitter:card | Set to "summary_large_image" for blog posts |
| twitter:title | Present, under 70 characters |
| twitter:description | Present, under 200 characters |
| twitter:image | Present, same as or similar to og:image |
| twitter:site | Present if the site has a Twitter/X account |
Step 10: URL Structure
| Check | Pass Criteria |
|---|---|
| Length | Short - under 75 characters for the path portion |
| Keyword presence | Primary keyword or close variant in the URL slug |
| No dates | URL does not contain /2025/ or /2026/ date segments |
| No special characters | Only lowercase letters, numbers, and hyphens |
| Lowercase | Entire URL path is lowercase |
| No stop words | Minimal use of "the", "a", "and", "of" in slug |
| No file extension | No .html or .php in the URL (clean URLs) |
Step 11: Generate Report
Output a comprehensive SEO validation report in this format:
## SEO Validation Report: [Title]
**File**: [path or URL]
**Date**: [check date]
**Overall**: [X/Y checks passed] - [PASS/NEEDS WORK/FAIL]
### Results
| # | Check | Status | Details | Fix |
|---|-------|--------|---------|-----|
| 1 | Title length | PASS | 52 chars | - |
| 2 | Title keyword | PASS | "keyword" in first half | - |
| 3 | Title power word | FAIL | No power word found | Add "Guide", "Essential", or "Complete" |
| 4 | Meta description length | PASS | 155 chars | - |
| 5 | Meta description stat | FAIL | No number found | Add a key statistic from the post |
| ... | ... | ... | ... | ... |
### Summary
**Passed**: [N] checks
**Failed**: [N] checks
### Priority Fixes
1. [Most impactful fix - what to change and where]
2. [Second most impactful fix]
3. [Third most impactful fix]
### Notes
- [Any observations about overall SEO health]
- [Suggestions for improvement beyond the checklist]
Status values:
- PASS - Meets the criteria
- FAIL - Does not meet the criteria, fix provided
- WARN - Partially meets criteria or edge case, recommendation provided
- N/A - Not applicable (e.g., no Twitter Card tags if site has no X account)
Optional: Live Performance Check (blog-google)
If the post has a published URL and blog-google credentials are available:
- Check credentials:
python3 skills/blog-google/scripts/run.py google_auth --check --json - If Tier 0+, run PageSpeed:
python3 skills/blog-google/scripts/run.py pagespeed_check <url> --json - Append to report:
- Lighthouse Performance, Accessibility, Best Practices, SEO scores
- CWV field data (LCP, INP, CLS) with traffic-light ratings
- Top 3 opportunities with estimated savings
- Falls back silently if credentials unavailable or URL not published.
When not to use it
- →Before the blog post is written
- →When the user provides a URL but WebFetch is unavailable
- →When `blog-google` credentials are not available for live performance checks
Limitations
- →Requires a completed blog post
- →Relies on `WebFetch` for URL input
- →Live performance checks are optional and depend on `blog-google` credentials
How it compares
This skill provides a complete, automated SEO validation with a prioritized fix list, which is more thorough and efficient than manual SEO auditing.
Compared to similar skills
blog-seo-check side by side with the closest alternatives in the catalog.
| Skill | Installs | Updated | Safety | Difficulty |
|---|---|---|---|---|
| blog-seo-check (this skill) | 0 | 2mo | No flags | Intermediate |
| seo-optimizer | 33 | 7mo | No flags | Intermediate |
| seo-keyword-strategist | 1 | 4mo | No flags | Beginner |
| content-trend-researcher | 30 | 9mo | Review | Intermediate |
Try saying
Example prompts that trigger this skill in your AI assistant.
You might also like
seo-optimizer
davila7
Search Engine Optimization specialist for content strategy, technical SEO, keyword research, and ranking improvements. Use when optimizing website content, improving search rankings, conducting keyword analysis, or implementing SEO best practices. Expert in on-page SEO, meta tags, schema markup, and Core Web Vitals.
seo-keyword-strategist
sickn33
Analyzes keyword usage in provided content, calculates density, suggests semantic variations and LSI keywords based on the topic. Prevents over-optimization. Use PROACTIVELY for content optimization.
content-trend-researcher
alirezarezvani
Advanced content and topic research skill that analyzes trends across Google Analytics, Google Trends, Substack, Medium, Reddit, LinkedIn, X, blogs, podcasts, and YouTube to generate data-driven article outlines based on user intent analysis
seo-content-planner
sickn33
Creates comprehensive content outlines and topic clusters for SEO. Plans content calendars and identifies topic gaps. Use PROACTIVELY for content strategy and planning.
seo-keyword-cluster-builder
ComeOnOliver
SEO keyword clustering with topic organization, content hub architecture, internal linking strategies. Use for content strategy, keyword research, pillar page structures, or encountering cluster organization, hub architecture, internal linking errors.
seo-aeo-content-quality-auditor
Youssef-Ashraf2099
Audits content for SEO and AEO performance with scored reports, severity-ranked fix lists, and projected scores after fixes. Activate when the user wants to audit, review, or score content for SEO or AEO compliance.