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border-beam — measured AI agent skill | DecimalAI

nexu-io/border-beam

NewSkillScoreMaintained

Give one card or CTA a lively accent: a small bright comet of light travels around its border. Brighter/livelier than shine-border — use for a single "new"/"featured" element, one per view. Pure CSS; fully static under prefers-reduced-motion.

Frontendby nexu-io

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

Automatic

Frontend / UI pack

1 · One-time — install the CLI (docs ↗)

pip install decimalai

2 · Get the skill — writes .claude/skills/nexu-io-border-beam/SKILL.md

decimalai skills pull nexu-io-border-beam --out .claude/skills/

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/nexu-io-border-beam/SKILL.md https://app.decimal.ai/s/nexu-io-border-beam/SKILL.md

Raw file: /s/nexu-io-border-beam/SKILL.md ↗ · machine-readable summary at /s/nexu-io-border-beam.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 2h ago

Yes — +27% lift-37% tokens0% turns91% of whole cases pass with skill (20/22)

Test case	Without → With	Effect	Δ tokens	Δ turns
case-03	✗→✓	▲ Improved	-29%	0%
case-09	✗→✓	▲ Improved	-62%	0%
case-11	✗→✓	▲ Improved	-58%	0%
case-12	✗→✓	▲ Improved	-31%	0%
case-14	✗→✓	▲ Improved	-50%	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

nexu-io / motion-anything

recipes/web/border-beam/SKILL.md

View on GitHub ↗

License Apache-2.0Imported 8/3/2026Version v1

Skill contents

SKILL.md

border-beam

A bright comet that travels an element's border. Part of motion-anything; obeys MOTION-SPEC.md. Technique popularized by Magic UI, reimplemented dependency-free (pure CSS).

When to use it

A single "new" / "featured" card or a hero CTA that should feel lively for a beat.

When NOT to use it (restraint)

Several at once (competing beams = noise). One per view.
Calm/serious contexts — or when a quieter full-border glow fits: use shine-border instead.

How to apply

Copy border-beam.css into the project and link it.
Mark the element:

html <div class="beam"> … </div>

Tune --beam-color, --beam-size, and the animation duration (default 3s).

Accessibility & performance

Under prefers-reduced-motion the beam stops; a plain static border remains.
Animates a masked conic-gradient (via @property --beam-angle) — compositor-friendly.

Framework notes

Pure CSS; works in any framework. Scope --beam-* per component.

Want to see if nexu-io/border-beam 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.