Borrowing it
Nothing to install: this file belongs to Kewton/CommandMate. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/Kewton/CommandMate/main/.agents/skills/video-to-gif/SKILL.mdgit clone --depth 1 https://github.com/Kewton/CommandMateWrote 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/kewton/commandmate/video-to-gif)<a href="https://agentmods.dev/skills/kewton/commandmate/video-to-gif"><img src="https://agentmods.dev/badge/skills/kewton/commandmate/video-to-gif/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/kewton/commandmate/video-to-gif"><img src="https://agentmods.dev/badge/skills/kewton/commandmate/video-to-gif.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00113 | $0.02714 |
| Opus 5.5 | $0.00045 | $0.01086 |
| Sonnet 5.5 | $0.00023 | $0.00543 |
| Haiku 4.5 | $0.00011 | $0.00271 |
Grade A, and why
video-to-gif 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.
How it starts
The opening of the file, as written. The whole thing — 143 lines — stays where its author put it; the contents beside it link to each section on GitHub.
video-to-gif
録画済みの動画を GIF にする。to-gif.sh 一発で、バイト予算に収まる GIF が出る。
.claude/skills/video-to-gif/scripts/to-gif.sh demo.mp4 # demo.gif を隣に出す
.claude/skills/video-to-gif/scripts/to-gif.sh *.mp4 --out docs/images/features
.claude/skills/video-to-gif/scripts/to-gif.sh clip.mp4 --max-bytes 500k
.claude/skills/video-to-gif/scripts/to-gif.sh --ladder # 再試行の段取りだけ表示（ffmpeg 不要）
.claude/skills/video-to-gif/scripts/to-gif.sh --report docs/images/features/*.gif
.claude/skills/video-to-gif/scripts/to-gif.sh --check # 依存確認のみ
なぜ GIF なのか
GitHub の markdown ビューアは <video> を描画しない。HTML 許可リストに含まれておらず、
動画添付が再生されるのは issue / PR / discussion のコメントだけである。リポジトリ内の
.md に貼って動く動画は GIF しかない。
例外は GitHub Pages（website/）で、そちらは素の HTML がそのまま配信されるので
<video> が使える。LP に置くなら GIF ではなく mp4 の方が軽い（実測 GIF 1.02MB に対し
mp4 0.56MB）。GIF が要るのは docs 配下の markdown だけ。
なぜ demo-video の compose.sh --gif と別なのか
compose.sh --gif は合成パイプラインの途中でしか発火せず、720px / 12fps / sierra2_4a を
ハードコードしている。docs に載せるときに要るのは「完成済みの mp4 から、リポジトリが
背負えるサイズの GIF を作る」ことで、しかも収まったかどうかは測って判断する必要がある。
この 2 点は合成の関心事ではないので別スキルにした。
設計判断: dither は既定で切る
同一素材（20 秒 / 1280x800 の UI キャプチャ）を、無劣化リファレンスに対する SSIM で実測した。
| 設定 | バイト数 | SSIM (All) |
|---|---|---|
colors=256 dither=none ← 既定 |
1,073,725 | 0.99653 |
colors=128 dither=none |
883,912 | 0.99439 |
colors=128 dither=sierra2_4a |
1,271,671 | 0.99160 |
colors=128 dither=bayer |
998,339 | 0.99149 |
colors=64 dither=none |
736,163 | 0.99202 |
ディザは 2 軸とも悪化させる。 空間ノイズを撒くので GIF が圧縮に使う LZW の run が壊れ、
かつ画面録画の大半を占める平坦な UI パネルには均すべきグラデーションが無い。
colors=64 + sierra2_4a は 1,472,301 バイトで colors=128 の同ディザより大きい —
パレットが粗いほど誤差拡散が遠くまで広がるためである。
グラデーションが実在する素材（写真・動画コンテンツ）では --dither sierra2_4a を
意識して渡すこと。既定で有効にはしない。
--stats-mode diff も測ったが誤差の範囲で、むしろ僅かに大きくなった（full のまま）。
バイト予算とラダー
--max-bytes（既定 1.5M）に収まるまで、3 軸をラウンドロビンで一段ずつ落として再試行する。
fps を底まで落としてから解像度に手を付ける、という順序にはしない。4fps 等倍も 360px 30fps も
中間の妥協より見た目が悪く、画面の文字が読めることが UI デモの目的だからである。
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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 Changed · +1 lines a5f6b4327cfc
- 1mo ago First seen · 142 lines · 113 tokens per session scan A c8dcc43c8743
video-to-gif is a skill published in the GitHub repository Kewton/CommandMate (44 stars, last pushed today), licensed MIT. It adds 113 tokens to every session and 2,714 once invoked, about $0.0005 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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