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 ansi-safe-border-caption-embeddinggit 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/ansi-safe-border-caption-embedding)<a href="https://agentmods.dev/skills/ychampion/cskill-agents/ansi-safe-border-caption-embedding"><img src="https://agentmods.dev/badge/skills/ychampion/cskill-agents/ansi-safe-border-caption-embedding/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/ansi-safe-border-caption-embedding"><img src="https://agentmods.dev/badge/skills/ychampion/cskill-agents/ansi-safe-border-caption-embedding.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 | $0.00024 | $0.00426 |
| Opus 5.5 | $0.00010 | $0.00170 |
| Sonnet 5.5 | $0.00005 | $0.00085 |
| Haiku 4.5 | $0.00002 | $0.00043 |
Grade A, and why
ansi-safe-border-caption-embedding 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: ANSI-Safe Border Caption Embedding
Domain: output-rendering Trigger: Apply when you must insert text into a border line (top or bottom) while preserving the border characters, colors, and alignment, even if the caption is wider than available space. Source Pattern: Distilled from reviewed terminal rendering, layout, animation, and accessibility implementations.
Core Method
Treat the border as a sequence of uniformly repeated characters, compute the textual width, and trim or center the caption before joining it back into the border; this keeps the corners intact. Use the helper that calculates string width (respecting wide characters), convert position into an absolute column, and split the border into before/text/after fragments so colors/dim states can be reapplied independently.
Key Rules
- Always compute string width on the caption and the border to avoid breaking wide glyphs when aligning.
- Guard with max width: if text length border length 2, cut the caption so it fits without overwriting corner glyphs.
- Reapply color/dim styling separately to the prefix, caption, and suffix before writing to the output buffer so ANSI escapes stay symmetric.
- Support
start,end, andcenteralignments plusoffsetadjustments so captions can hug either edge without manual math.
Example Application
When labeling a dialog border, call this method with position:'top', align:'center', and the pre-rendered caption string; clip it if the window narrows, and keep the corner and side glyphs in place so the divider stays crisp.
Anti-Patterns (What NOT to do)
- Do not blur characters by writing the caption directly into the border string without recalculating width; wide glyphs will be truncated incorrectly.
- Do not drop color/dim styling while embedding text, which makes the caption disappear under multi-colored borders.
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 · 24 tokens per session scan A 41204218d2cd
ansi-safe-border-caption-embedding is a skill published in the GitHub repository ychampion/cskill-agents (36 stars, last pushed 6mo ago), licensed MIT. It adds 24 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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