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 meitu/meitu-skills --skill video-canvas-expandgit clone --depth 1 https://github.com/meitu/meitu-skillsWrote 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/meitu/meitu-skills/video-canvas-expand)<a href="https://agentmods.dev/skills/meitu/meitu-skills/video-canvas-expand"><img src="https://agentmods.dev/badge/skills/meitu/meitu-skills/video-canvas-expand/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/meitu/meitu-skills/video-canvas-expand"><img src="https://agentmods.dev/badge/skills/meitu/meitu-skills/video-canvas-expand.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 5 findings, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high Privilege Escalation · line 5 Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
- high Privilege Escalation · line 9 Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
- high Privilege Escalation · line 11 Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
- high Privilege Escalation · line 17 Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
- medium Rogue Agent · line 20 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
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 | $0.00076 | $0.01380 |
| Opus 5 | $0.00038 | $0.00690 |
| Sonnet 5 | $0.00015 | $0.00276 |
| Haiku 4.5 | $0.00008 | $0.00138 |
Grade A, and why
video-canvas-expand 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 12d 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 — 125 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Video Canvas Expand
Overview
将视频画面按方向向外 outpainting 扩展，AI 根据 prompt 智能补全扩展区域。支持左/右/上/下任意组合方向，每条边扩展 0~0.5 倍原边长。时长不变，仅画面变宽/变高。
不处理：视频内容编辑（替换画面内容）、视频时长延长、视频裁剪/缩小、图片扩展。
API Mapping
| 场景 | API name | workflow |
|---|---|---|
| 视频画布扩展（outpainting） | video_canvas_expand |
aigc_vace_outpainting_flow |
Dependencies
- meitu-cli:
>=2.0.6 - 凭证：CONFIG AKSK →
meitu tools update；EXEC AKSK → 跑命令 - 环境变量：
MEITU_OPENAPI_TOOL_TASK_MODE=command
路径别名：
$VISUAL={OPENCLAW_HOME}/workspace/visual/
Core Workflow
Preflight → Execute → Deliver
Preflight
meitu --version与meitu auth verify --json- 检测
MEITU_OPENAPI_TOOL_TASK_MODE=command - output_dir：项目 →
./output/；一次性 →$VISUAL/output/video-canvas-expand/；mkdir -p
Execute
触发信号与路由
| 用户原话 | 路由 |
|---|---|
| 扩展视频 / 视频扩图 / outpainting / 往某方向扩 / 补画面 | video_canvas_expand |
决策顺序：
video_url缺失 → 追问；prompt缺失 → 追问"扩展区域补什么"directions不传默认四方向全扩；expand_ratio不传默认0.3- 唯一路由：调用
video_canvas_expand
参数定义
| 参数 | 类型 | 必填 | 范围 | 默认 | 说明 |
|---|---|---|---|---|---|
video_url |
STRING | 是 | — | — | 原视频 URL |
prompt |
STRING | 是 | — | — | 扩展区域补什么（如"补蓝天"、"扩展街景"） |
expand_ratio |
STRING | 否 | 0 ~ 0.5 | "0.3" |
每条边扩展比例 |
directions |
STRING | 否 | left/right/up/down 组合（逗号分隔） | "left,right,up,down" |
扩展方向 |
工具调用
meitu video-canvas-expand \
--skill_name skill_video-canvas-expand \
--video_url {url} \
--prompt "{扩展内容描述}" \
[--expand_ratio 0.3] \
[--directions "left,right,up,down"] \
--json --download-dir {output_dir}
错误降级
| 场景 | 处理 |
|---|---|
video_url 缺失 |
提示"请提供需要扩展的视频" |
video_url 不可访问 |
不重试，提示"请提供有效视频链接" |
prompt 缺失 |
提示"请描述扩展区域想补全的内容（如'补蓝天'）" |
expand_ratio 越界（<0 或 >0.5） |
截断至 [0, 0.5] 或提示调整 |
directions 非法值 |
回退至默认四方向 |
| API 调用失败 / 超时 | 重试 1 次，仍失败返回错误 |
| 内容合规拦截 | 直接返回合规提示，不重试 |
| 用户说"改成 16:9"但意图是裁剪 | 本工具仅扩展不裁剪，告知差异 |
| 输入为图片 | 拒绝，仅支持视频 |
Deliver
mv {file} {output_dir}/{date}_{name}_canvas-expand.mp4
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.
- 12d ago First seen · 125 lines · 76 tokens per session scan A 5ae9823f5bfb
video-canvas-expand is a skill published in the GitHub repository meitu/meitu-skills (32 stars, last pushed 15d ago), licensed MIT. It adds 76 tokens to every session and 1,380 once invoked, about $0.0004 per session on Opus 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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