Markitdown
ImCa0/just-laws
Convert files and office documents to Markdown. An agent skill from ImCa0/just-laws.
Writes a reusable house style for open-sheet workbooks as a themes Markdown file, with an optional demo workbook, so every spreadsheet follows the same brand look.
Install Open-Sheet Theme Creator
$ npx skills add lianghsun/open-sheet --skill create-theme -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install lianghsun/open-sheet create-theme --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/lianghsun/open-sheet.git skills-src && mkdir -p .claude/skills && cp -r skills-src/packages/core/skills/create-theme .claude/skills/create-theme && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "create-theme" agent skill from https://github.com/lianghsun/open-sheet/tree/main/packages/core/skills/create-theme into .claude/skills/create-theme/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "create-theme", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/lianghsun/open-sheet/tree/main/packages/core/skills/create-themeType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add lianghsun/open-sheet --skill create-theme -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install lianghsun/open-sheet create-theme --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/lianghsun/open-sheet.git skills-src && mkdir -p .agents/skills && cp -r skills-src/packages/core/skills/create-theme .agents/skills/create-theme && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "create-theme" agent skill from https://github.com/lianghsun/open-sheet/tree/main/packages/core/skills/create-theme into .agents/skills/create-theme/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "create-theme", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add lianghsun/open-sheet --skill create-theme -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install lianghsun/open-sheet create-theme --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/lianghsun/open-sheet.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/packages/core/skills/create-theme .cursor/skills/create-theme && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "create-theme" agent skill from https://github.com/lianghsun/open-sheet/tree/main/packages/core/skills/create-theme into .cursor/skills/create-theme/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "create-theme", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/lianghsun/open-sheet.git --path packages/core/skills/create-theme--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add lianghsun/open-sheet --skill create-theme -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install lianghsun/open-sheet create-theme --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/lianghsun/open-sheet.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/packages/core/skills/create-theme .gemini/skills/create-theme && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "create-theme" agent skill from https://github.com/lianghsun/open-sheet/tree/main/packages/core/skills/create-theme into .gemini/skills/create-theme/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "create-theme", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install lianghsun/open-sheet create-themeInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add lianghsun/open-sheet --skill create-theme -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/lianghsun/open-sheet.git skills-src && mkdir -p .github/skills && cp -r skills-src/packages/core/skills/create-theme .github/skills/create-theme && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "create-theme" agent skill from https://github.com/lianghsun/open-sheet/tree/main/packages/core/skills/create-theme into .github/skills/create-theme/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "create-theme", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add lianghsun/open-sheet --skill create-theme -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install lianghsun/open-sheet create-theme --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/lianghsun/open-sheet.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/packages/core/skills/create-theme .opencode/skills/create-theme && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "create-theme" agent skill from https://github.com/lianghsun/open-sheet/tree/main/packages/core/skills/create-theme into .opencode/skills/create-theme/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "create-theme", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
create-theme- GitHub stars
- 127
- Token cost
- ~452 tokens
- SKILL.md length
- 53 words
- Files
- 1
- Skills in repo
- 5
- Repo updated
- First seen
- Licence
- MIT
At a glance
Writes a reusable house style for open-sheet workbooks as a themes Markdown file, with an optional demo workbook, so every spreadsheet follows the same brand look.
- Making a theme from your brand colors for all spreadsheets
- SKILL.md covers The file and Conventions
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Creating a corporate template for open-sheet workbooks
What it does
A theme is a house style that workbooks link to through meta.theme, and it is kept as Markdown so both people and agents can read it. This skill writes that file into the themes folder, named after the theme's id. The file starts with frontmatter holding a name and a description, followed by a design system object in TSX that is kept as a plain object literal so the Design panel can rewrite it. You can also add a small demo workbook in the same folder so the gallery has something to preview.
The conventions put assumptions on their own sheet as key-value pairs. The rules apply to print and Excel alike: one accent color, because a second one competes; a white or near-white background; body text no smaller than 10pt; and number formats treated as part of the theme, since a house style that leaves ratios unformatted has not done its job.
When your agent uses it
- Making a theme from your brand colors for all spreadsheets
- Creating a corporate template for open-sheet workbooks
- Adding a demo workbook so a theme shows up in the gallery
Example prompts
- “Make a theme with our brand colors: near-white background and one teal accent.”
- “All our spreadsheets should look like the finance team's report. Create a corporate template from it.”
- “Add a demo workbook for the corporate-neutral theme so the gallery can preview it.”
Requirements
- An open-sheet project with a themes folder
What it can do on your machine
Read from SKILL.md and the folder at commit 6ab72dd. 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
No scripts in the folder and no shell commands in SKILL.md (its code samples are markdown).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Open-Sheet Theme Creator loads about 452 tokens when it runs. Until then it costs about 72 tokens; SKILL.md has 53 words of instructions outside code blocks.
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
Auto-check passed
The automated check found no risky patterns in SKILL.md.
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); files beside SKILL.md are not scanned.
SKILL.md
The full file from lianghsun/open-sheet at commit 6ab72dd, republished under its MIT licence (© lianghsun). 53 words, ~452 tokens.
Download SKILL.mdSave it as
.claude/skills/create-theme/SKILL.md (or your agent's skills folder).- name
- create-theme
- description
- Use this skill when the user wants a reusable house style for open-sheet workbooks — "make a theme with our brand colours", "all our spreadsheets should look like this", "create a corporate template". Writes `themes/<id>.md` and an optional demo workbook the gallery previews.
Create a theme
A theme is a house style that workbooks link to with meta.theme. It lives as
markdown so it is readable by both people and agents.
The file
themes/<id>.md:
---
name: corporate-neutral
description: Near-white, one blue accent, sans throughout.
---
# Corporate neutral
## Palette
| Token | Value | Used for |
| --- | --- | --- |
| ink | #0f172a | body text, table header fill |
| accent | #1d4ed8 | KPI values, data bars |
| band | #f8fafc | total rows, key-value fills |
| rule | #cbd5e1 | hairlines |
## Formats
Currency `#,##0` · Percent `0.0%` · Dates `yyyy-mm-dd`
## Paste-ready design const
```tsx
export const design: DesignSystem = { … }Conventions
- Assumptions always on their own sheet, key-value
- Data bars on the primary magnitude column only
- Column widths: labels 24, figures 14
Optionally add `themes/<id>.demo.tsx` — a small workbook exercising the theme, so
the gallery has something to show.
## Rules that matter for print and Excel alike
- **One accent colour.** A second one competes; a third is decoration.
- **White or near-white background.** Anything darker costs toner and makes
Excel's own selection highlight unreadable.
- **Body text no smaller than 10pt.** Spreadsheets get printed and squinted at.
- **Number formats are part of the theme.** A house style that leaves ratios
unformatted has not done its job.
- Keep the `design` const a plain object literal so the Design panel can rewrite it.© lianghsun, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in packages/core/skills/create-theme of lianghsun/open-sheet.
Open the folder on GitHubat commit 6ab72dd
Compare with similar skills
Open-Sheet Theme Creator next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Open-Sheet Theme Creator this skilllianghsun/open-sheet | 127 | — | ~452 | Automated safety check: Pass | MIT | |
| MarkitdownImCa0/just-laws | 781 | 14 repos | ~3.2k | Automated safety check: Notes | MIT | |
| PipesHub Excel Spreadsheet Builderpipeshub-ai/pipeshub-ai | 3.8k | — | ~1.8k | Automated safety check: Pass | Apache-2.0 | |
| Docx4jplutext/docx4j | 2.4k | — | ~2.5k | Automated safety check: Pass | None | |
| Instrument Data To Allotropeaws-samples/amazon-bedrock-agents-healthcare-lifesciences | 274 | 2 repos | ~2.7k | Automated safety check: Pass | Apache-2.0 | |
| Cyber Pptcrazyykhllc-bit/CyberPPT | 1.8k | — | ~10k | Automated safety check: Pass | MIT |
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Related
Works with
Categories
Questions about Open-Sheet Theme Creator
What does Open-Sheet Theme Creator do?
Writes a reusable house style for open-sheet workbooks as a themes Markdown file, with an optional demo workbook, so every spreadsheet follows the same brand look. theme, and it is kept as Markdown so both people and agents can read it. This skill writes that file into the themes folder, named after the theme's id.
When should I use Open-Sheet Theme Creator?
Open-Sheet Theme Creator fits situations like: making a theme from your brand colors for all spreadsheets; creating a corporate template for open-sheet workbooks; adding a demo workbook so a theme shows up in the gallery.
How do I install Open-Sheet Theme Creator in Claude Code?
Run `npx skills add lianghsun/open-sheet --skill create-theme -a claude-code`. Or copy the skill folder (packages/core/skills/create-theme in lianghsun/open-sheet) into .claude/skills/create-theme in your project. Claude Code loads it when a task matches its description.
How do I install Open-Sheet Theme Creator in Codex?
Run `npx skills add lianghsun/open-sheet --skill create-theme -a codex`. Or copy the skill folder (packages/core/skills/create-theme in lianghsun/open-sheet) into .agents/skills/create-theme in your project. Codex loads it when a task matches its description.
Can I use Open-Sheet Theme Creator in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add lianghsun/open-sheet --skill create-theme -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/create-theme, .gemini/skills/create-theme, .github/skills/create-theme and .opencode/skills/create-theme in your project.
What does Open-Sheet Theme Creator need to run?
SKILL.md names no scripts, command-line tools or credentials: Open-Sheet Theme Creator is instructions for the agent only. Our summary lists: An open-sheet project with a themes folder.
Does Open-Sheet Theme Creator access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Open-Sheet Theme Creator safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Open-Sheet Theme Creator use?
Open-Sheet Theme Creator is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Open-Sheet Theme Creator use?
About 452 tokens (SKILL.md is roughly 1.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Open-Sheet Theme Creator?
Skills that share tags, products or a category with Open-Sheet Theme Creator: Markitdown (ImCa0/just-laws, 781 stars), PipesHub Excel Spreadsheet Builder (pipeshub-ai/pipeshub-ai, 3.8k stars), Docx4j (plutext/docx4j, 2.4k stars) and Instrument Data To Allotrope (aws-samples/amazon-bedrock-agents-healthcare-lifesciences, 274 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Open-Sheet Theme Creator?
lianghsun (a GitHub user) maintains it in lianghsun/open-sheet, which has 127 GitHub stars. The repository holds 5 skills in this directory. The repository was last updated on August 26, 2026.
Source: lianghsun/open-sheet on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.