Edu Chem Video

What it does

When your agent uses it

• Asked to make an explainer / walkthrough video (讲解视频、解题视频、例题精讲、微课) for a chemistry problem (化学题: 氧化还原配平 双线桥 电子守恒
• 化学平衡 三段式 平衡常数 转化率 反应速率
• From a problem screenshot
• With Chinese voice-over (GLM-TTS / 智谱 TTS)

Example prompts

• “/edu-chem-video”

Requirements

• Python 3
• Node.js
• A Bash shell
• A credential in GLM_API_KEY

Workflow steps

11 steps, taken from the first numbered list in SKILL.md.

1. 1严格按下面 11 步顺序做，每步的"通过标准"满足了才能进入下一步。
2. 2先按化学方法解对题。 第 1 步写出解题卡（反应类型、限量物质、配平过程、关系、计算、守恒验算），见 reference/chemistry-solving.md；方程式必须用 chem_check.py 核对。
3. 3先讲清楚题目。 第一幕展示原题图片，旁白逐条读条件（"足量""标准状况""2 L 容器"都要读出来并框出）。
4. 4tts 只能是能念出来的中文，化学式一律换成名称。 HNO3 → 硝酸，SO4^{2-} → 硫酸根离子，0.2 mol·L^{-1} → 零点二摩尔每升，+5 → 正五价（对照表见 reference/script-writing.md）。字幕 zh…
5. 5读音必须固定。 调 TTS 之前 --check 必须显示 未固定读音的生僻字/多音字: 0 且 script errors: 0。标注写在字后面：还[huán]原、盛[chéng]有。
6. 6API Key 只能由用户提供。 缺 GLM_API_KEY 时先问用户：配置 key（推荐），还是用兜底引擎（edge-tts / macOS say，见 reference/glm-tts-setup.md）。不要编造 key、模型名或接口地址，不要打印 key。
7. 7化学画面必须正确。 化合价、系数、双线桥的起止元素与电子数、单位、分子盒里的数量（写明每个分子代表多少 mol）都要与解题卡一致；颜色约定：失电子 / 升价蓝，得电子 / 降价红。
8. 8版面：方程式条 y 140~300（eqStrip + equation(spec, 960, EQY)）；演示区 x 60~900、y 310~860；石板用 board() + bm()（第 0~8 行）；一切在 y ≤ 860。
9. 9先写分镜，再写动画：storyboard.md 顶部写解题卡 + 图形清单，每句规划"指/动/留"，按 reference/visual-design.md 的化学动作表选动作；node render.mjs motion 必须通过。
10. 10先预览再花钱（--preview + stills auto），看图验证（每次都打开 build/sheet*.png，汇报你实际看到了什么）。
11. 11不要修改 engine.js；通用化学道具加在 chem.js，只属于这道题的图形写在 anim.js。不要把 node_modules、package*.json 复制进视频文件夹。

What it can do on your machine

Read from SKILL.md and the folder at commit 6a9c876. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Ships 4 files in scripts/ (Python, JavaScript and Shell, from the files we listed), which the agent can run.

  Shell commands in SKILL.md call:

  • node
  • bash
  • npm

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  No URLs in SKILL.md. Its commands use npm, which can reach the network depending on how they are called.

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names these keys or tokens, usually read from environment variables:

  • GLM_API_KEY

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Edu Chem Video loads about 2.1k tokens when it runs. Until then it costs about 98 tokens; SKILL.md has 474 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~98

When it runs · the whole SKILL.md, loaded when a task matches

~2.1k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

• NoteMentions a .env fileSKILL.md:28

  ：视频文件夹建在这里，mp4/srt 也输出到这里。**不要因为别的目录已经有 `.env`、`node_modules`、`pron.json` 就把 WS 换过去**。`PROJ` = 本视频文件夹，`PY` = `setup_chec

• NoteMentions a .env fileSKILL.md:63

  md) 引导用户**（`~/.config/math-problem-video/.env`，三个视频技能共用）。用户没有 key：`TTS_ENGINE=auto` 自动兜底；装 edge-tts 前先征得同意。

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.

SKILL.md

The full file from wy51ai/edulab at commit 6a9c876, republished under its Apache-2.0 licence (© wy51ai). 474 words, ~2,079 tokens.

name

edu-chem-video

description

Use when asked to make an explainer / walkthrough video (讲解视频、解题视频、例题精讲、微课) for a chemistry problem (化学题: 氧化还原配平 双线桥 电子守恒, 物质的量计算, 化学平衡 三段式 平衡常数 转化率 反应速率, 离子反应, 电化学, 溶液 滴定, 工业流程), from a problem screenshot or text, with Chinese voice-over (GLM-TTS / 智谱 TTS), bilingual zh+en subtitles and chalkboard-style canvas animation built around the chemical equation, rendered to MP4.

script.json ──build_audio.py──► build/timeline.json + build/mix.wav + ../<name>.srt
     (旁白)     (GLM-TTS + 合成音乐)          │
anim.js + chem.js + engine.js ◄───────────────┘ (按旁白时间点驱动动画)
     └──node render.mjs video──► ../<name>.mp4

PY SKILL/scripts/chem_check.py balance "Cu + HNO3 -> Cu(NO3)2 + NO + H2O"
PY SKILL/scripts/chem_check.py check "3Cu + 8HNO3 = 3Cu(NO3)2 + 2NO + 4H2O"

bash SKILL/scripts/new_video.sh "$PWD" <ascii_folder_name>
bash SKILL/scripts/setup_check.sh WS/<ascii_folder_name>

cd PROJ && PY build_audio.py --say "你好，我们来看一道化学题。"

cd PROJ && PY build_audio.py --check ; cat build/pron_report.txt

cd PROJ && PY build_audio.py --preview && node render.mjs motion && node render.mjs stills auto && PY SKILL/scripts/contact_sheet.py .

cd PROJ && PY build_audio.py && PY build_audio.py --asr && node render.mjs stills auto && PY SKILL/scripts/contact_sheet.py .

cd PROJ && node render.mjs video 6      # 6 = 并行浏览器页数（不是帧率）

© wy51ai, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 36 other files (scripts) in skills/edu-chem-video of wy51ai/edulab.

• SKILL.md
• examples/equilibrium/anim.js
• examples/equilibrium/episode.json
• examples/equilibrium/problem.png
• examples/equilibrium/script.json
• examples/equilibrium/storyboard.md
• reference/animation.md
• reference/chemistry-solving.md
• reference/glm-tts-setup.md
• reference/pronunciation.md
• reference/script-writing.md
• reference/troubleshooting.md
• reference/visual-design.md
• scripts/chem_check.py
• scripts/contact_sheet.py
• scripts/make_problem_png.py
• scripts/new_video.sh
• … and 20 more

Open the folder on GitHubat commit 6a9c876