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Set canonical URLs for all pages — measured AI agent skill | DecimalAI

thedaviddias/canonical-url

SkillScore100Maintained

Use when auditing metadata, crawlability, structured data, or indexability related to Set canonical URLs for all pages. Verify the rendered HTML and HTTP response rather than relying only on source files.

by thedaviddias

Links this skill to your agents and keeps it current with the author’s updates.

Automatic

Frontend / UI pack

decimalai skills pull thedaviddias-canonical-url

Get this skill — curl · raw file

curl -fsSL https://app.decimal.ai/s/thedaviddias-canonical-url/SKILL.md

Raw file: /s/thedaviddias-canonical-url/SKILL.md ↗ · machine-readable summary at /s/thedaviddias-canonical-url.json ↗

In productionGlobal

how this skill behaves on real traffic · last 30 days

No production data for this skill yet — usage numbers appear here once agents start running it.

Anonymized aggregate across every org using this skill — proof from real production use, not a demo.

Does this skill help? · Benchmark: with vs. withoutsign in to run this on your agents

23 test cases from the publisher’s eval.yaml · each run twice on gemini-3.6-flash — with the skill injected, then without · last run 6h ago

Yes — +4% lift+12% tokens0% turns100% of whole cases pass with skill (23/23)

Test case	Without → With	Effect	Δ tokens	Δ turns
case-21	✗→✓	▲ Improved	35%	0%
case-01	✓→✓	＝ Same ✓	26%	0%
case-02	✓→✓	＝ Same ✓	46%	0%
case-03	✓→✓	＝ Same ✓	77%	0%
case-04	✓→✓	＝ Same ✓	20%	0%

Showing 5 of 23 cases

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

thedaviddias / front-end-checklist

skills/canonical-url/SKILL.md

View on GitHub ↗

Imported 8/3/2026Version v1Bundled 1 file

Skill contents

references/

SKILL.md

Set canonical URLs for all pages

Duplicate content from URL parameters, www vs non-www, or pagination dilutes ranking signals—canonical tags consolidate these signals to the preferred URL.

Quick Reference

Canonical URLs tell search engines which version of a page to index
Prevents duplicate content penalties from URL variations
Use absolute URLs including protocol and domain
Self-referencing canonicals are a best practice

Check

Verify that this page has a canonical URL tag and that it points to the correct preferred version.

Fix

Add or correct the canonical URL tag in the head section to prevent duplicate content issues.

Explain

Explain how canonical URLs help search engines understand the preferred version of duplicate or similar pages.

Code Review

Review metadata generation, rendered HTML, structured data, and response headers related to Set canonical URLs for all pages. Flag exact routes or templates where search-facing output violates the rule, and describe how to verify the final page output.

For full implementation details, code examples, and framework-specific guidance, see references/rule.md.

Rule page: https://frontendchecklist.io/en/rules/seo/canonical-url

Want to see if thedaviddias/canonical-url would activate on your phrasing? Try it before you install — no LLM call, no signup.

Other measured skills in the registry, with their headline benchmark lift.