chengfeng-videocut-skills is a Codex plugin that coordinates Chinese voiceover video editing through the chengfeng-videocut runtime, whose command-line tools and APIs perform the actual processing. It is for agents that need to edit and export narrated videos, while its catalogue skills handle decisions and workflow coordination around that runtime.
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 Agentchengfeng/chengfeng-videocut-skills --skill chengfeng-check-updatesgit clone --depth 1 https://github.com/Agentchengfeng/chengfeng-videocut-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/agentchengfeng/chengfeng-videocut-skills/chengfeng-check-updates)<a href="https://agentmods.dev/skills/agentchengfeng/chengfeng-videocut-skills/chengfeng-check-updates"><img src="https://agentmods.dev/badge/skills/agentchengfeng/chengfeng-videocut-skills/chengfeng-check-updates/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/agentchengfeng/chengfeng-videocut-skills/chengfeng-check-updates"><img src="https://agentmods.dev/badge/skills/agentchengfeng/chengfeng-videocut-skills/chengfeng-check-updates.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 | $0.00120 | $0.03701 |
| Opus 5 | $0.00060 | $0.01851 |
| Sonnet 5 | $0.00024 | $0.00740 |
| Haiku 4.5 | $0.00012 | $0.00370 |
Grade A, and why
chengfeng-check-updates 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 — 241 lines — stays where its author put it; the contents beside it link to each section on GitHub.
检查更新（环境总管）
环境的一切逻辑只写在本 Skill：skills 版本、Runtime 安装与体检。业务 Skill 第 0 步 一行引用下面的「就绪检查」，自己不带任何环境逻辑——环境策略要变，只改这一个文件。 本 Skill 不建项目、不打开 Studio、不转录任何媒体。
就绪检查（业务 Skill 的第 0 步从这里执行）
三步走完，输出三态之一：就绪 / 需新会话 / 停。
一、定位当前 Plugin cache（只读）
从 host 提供的本 Skill 实际源文件路径定位：本文件所在目录向上两级就是
<插件根>。用文件读取工具确认 <插件根>/.codex-plugin/plugin.json 与
<插件根>/scripts/check-plugin-update.cjs 都存在。路径不可取得、目录层级不符或
文件不存在时，以 installed_identity_missing 停止更新比较；不得调用用户
CODEX_HOME 下的 codex plugin list 补猜，也不得搜索整个磁盘。
此后所有命令里的 <插件根> 都代入这个字面路径（含空格时整段引号包住）。
命令块不用 shell 变量与命令替换——bash 和 PowerShell 的赋值语法互不兼容。
检查脚本会从自己所在的 cache 直接读取 installed manifest、provenance、Marketplace
exact revision 与 bundle digest；检查阶段不依赖用户 Marketplace CLI 输出。
二、skills 最新吗
node "<插件根>/scripts/check-plugin-update.cjs" --marketplace chengfeng-videocut --json
（Marketplace 名默认 chengfeng-videocut；用户自己配过别的名字就用他配的。）
current→ 继续第三步update_available_confirmation_required→ 展示installed、candidate与候选四项： version、40-hexsnapshotRevision（B）、40-hexcontentRevision（A）、publisherChecksum（SHA-256），停下等用户确认；确认后走下面「激活」节。 激活成功 = 需新会话：会话开始时 skill 文本已载入，中途更新对本会话不生效， 请用户新开会话再继续任务- 若同时有
legacyInstalledIdentity=true，说明这是历史 0.10.5 到新证明格式的 一次性兼容迁移；仍使用同一确认门，不要求用户预先修改 Marketplace ref
- 若同时有
marketplace_not_found/marketplace_source_untrusted/marketplace_ref_unsafe→ 当前用户 Marketplace 缺失、来源不可信或不是 exact 40-hex pin；不调用用户 Codex CLI 修复，报告后继续第三步installed_identity_missing/installed_identity_untrusted→ 当前 cache 身份无法 安全读取或证明，不猜版本、不激活；报告后继续第三步installed_context_mismatch→ 当前 Skill 的真实 cache 路径、Marketplace 名或 显式CODEX_HOME不一致；不搜索其他 cache，也不激活isolated_stage_failed/isolated_stage_schema_invalid/isolated_cleanup_failed→ 临时候选 stage、CLI schema 或临时目录清理失败；用户 HOME 零写入，报告后继续第三步update_metadata_untrusted→ version + B + A + SHA-256 证明不成立，不激活； 报告后继续第三步candidate_older_than_installed→ 禁止降级，报告后继续第三步- 网络不可达或其他检查错误 → 向用户说明一句，带当前 Runtime 检查继续第三步—— 更新检查失败不阻塞干活
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.
- 12d ago First seen · 241 lines · 120 tokens per session scan A 5408236fb12b
chengfeng-check-updates is a skill published in the GitHub repository Agentchengfeng/chengfeng-videocut-skills (2,989 stars, last pushed 3d ago), licensed Apache-2.0. It adds 120 tokens to every session and 3,701 once invoked, about $0.0006 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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