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Ensure all IDs are unique — measured AI agent skill | DecimalAI

thedaviddias/unique-id

NewSkillScoreMaintained

Use when reviewing templates, rendered HTML, or shared components related to Ensure all IDs are unique. Validate the final browser-facing markup, not just the source framework abstraction.

Frontendby thedaviddias

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

Automatic

Frontend / UI pack

decimalai skills pull thedaviddias-unique-id

Get this skill — curl · raw file

curl -fsSL https://app.decimal.ai/s/thedaviddias-unique-id/SKILL.md

Raw file: /s/thedaviddias-unique-id/SKILL.md ↗ · machine-readable summary at /s/thedaviddias-unique-id.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

22 test cases from the publisher’s eval.yaml · each run twice on gemini-3.6-flash — with the skill injected, then without · last run 3h ago

Yes — +5% lift+10% tokens0% turns95% of whole cases pass with skill (21/22)

Test case	Without → With	Effect	Δ tokens	Δ turns
case-12	✗→✓	▲ Improved	9%	0%
case-18	✗→✓	▲ Improved	-20%	0%
case-13	✓→✗	▼ Worse	37%	0%
case-02	✓→✓	＝ Same ✓	10%	0%
case-08	✓→✓	＝ Same ✓	9%	0%

Showing 5 of 22 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/unique-id/SKILL.md

View on GitHub ↗

Imported 8/3/2026Version v1Bundled 1 file

Skill contents

references/

SKILL.md

Ensure all IDs are unique

Duplicate IDs break form accessibility (labels don't connect), ARIA relationships fail, and JavaScript getElementById returns wrong elements—causing silent bugs.

Quick Reference

Each ID must appear only once per HTML document
Use classes for styling, IDs for unique anchors/references
Check for duplicates introduced by component libraries
Duplicate IDs break form labels, ARIA, and getElementById

Check

Scan this HTML document to ensure all ID attributes are unique across the entire page and properly reference related elements.

Fix

Remove duplicate ID values, ensure each ID is used only once per page, and update any references like labels, ARIA attributes, or JavaScript selectors.

Explain

Explain why unique IDs are essential for HTML validity, accessibility (form labels, ARIA), JavaScript functionality, and CSS styling.

Code Review

Review templates, server-rendered HTML, and shared components that output markup related to Ensure all IDs are unique. Flag exact elements, attributes, and routes where the rendered HTML violates the rule.

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

Rule page: https://frontendchecklist.io/en/rules/html/unique-id

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