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 ychampion/cskill-agents --skill capability-based-spinner-glyph-selectiongit clone --depth 1 https://github.com/ychampion/cskill-agentsWrote 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/ychampion/cskill-agents/capability-based-spinner-glyph-selection)<a href="https://agentmods.dev/skills/ychampion/cskill-agents/capability-based-spinner-glyph-selection"><img src="https://agentmods.dev/badge/skills/ychampion/cskill-agents/capability-based-spinner-glyph-selection/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/ychampion/cskill-agents/capability-based-spinner-glyph-selection"><img src="https://agentmods.dev/badge/skills/ychampion/cskill-agents/capability-based-spinner-glyph-selection.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 | $0.00027 | $0.00426 |
| Opus 5.5 | $0.00011 | $0.00170 |
| Sonnet 5.5 | $0.00005 | $0.00085 |
| Haiku 4.5 | $0.00003 | $0.00043 |
Grade A, and why
capability-based-spinner-glyph-selection 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 1mo ago.
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.
What it actually says
SKILL: Capability Based Spinner Glyph Selection
Domain: spinner-states Trigger: Use when building a spinner glyph that must adapt to reduced-motion settings, theme colors, and stalled intensity while keeping the animation loop small. Source Pattern: Distilled from reviewed terminal rendering, layout, animation, and accessibility implementations.
Core Method
Build the spinner glyph as a small composable component that decides on its character set and color per frame rather than swapping the whole spinner. Keep the spinner polymorphic: one glyph for the normal cycle, a single-dot fallback under reduced-motion, and an interpolated color path when the state is stalled. Have the component recompute only what changed (glyph, color, dimming flag) so the Ink renderer can reuse cached Box/Text nodes.
Key Rules
- Drive the glyph selection from shared state (frame count, reduced-motion flag, stall intensity) and avoid new timers per spinner.
- Only swap glyphs/text nodes when the computed glyph, color, or reduced-motion dim state differs from the cached values.
- Interpolate colors through the theme lookup when stall intensity is positive; fall back to semantic names such as
errorif the RGB parse fails. - Provide a single-dot glyph for reduced-motion and let dimColor toggle per half-cycle so motion is still perceivable without rapid frames.
Example Application
When writing a database CLI spinner, reuse this skill by feeding the shared 50ms clock, the stalledIntensity derived from tool activity, and the host theme, and let the spinner component pick a glyph and color per frame instead of re-rendering the entire line.
Anti-Patterns (What NOT to do)
- Don’t hardcode a single glyph or color and rerender the whole spinner on every frame.
- Don’t duplicate the timer logic inside each spinner; share the clock and only recompute derived glyph/color values when the inputs change.
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.
- 1mo ago First seen · 28 lines · 27 tokens per session scan A f6c1f53d94e0
capability-based-spinner-glyph-selection is a skill published in the GitHub repository ychampion/cskill-agents (36 stars, last pushed 6mo ago), licensed MIT. It adds 27 tokens to every session and 426 once invoked, about $0.0001 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 2026-08-30.
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