Smalldocs Author
espressoplease/smalldocs
Create finished SmallDocs Markdown for an application using the SmallDocs renderer.
A skill your agent uses when the user wants a chart of numbers in Markdown (bar, line, area, scatter, pie, hist, heatmap, funnel, waterfall, radar, gauge, sankey, treemap, dumbbell, bullet, boxplot…
Install Markvis
$ npx skills add geekplux/markvis --skill markvis -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install geekplux/markvis markvis --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/geekplux/markvis.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/markvis .claude/skills/markvis && 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 "markvis" agent skill from https://github.com/geekplux/markvis/tree/master/skills/markvis into .claude/skills/markvis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "markvis", 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/geekplux/markvis/tree/master/skills/markvisType 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 geekplux/markvis --skill markvis -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install geekplux/markvis markvis --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/geekplux/markvis.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/markvis .agents/skills/markvis && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "markvis" agent skill from https://github.com/geekplux/markvis/tree/master/skills/markvis into .agents/skills/markvis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "markvis", 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 geekplux/markvis --skill markvis -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install geekplux/markvis markvis --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/geekplux/markvis.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/markvis .cursor/skills/markvis && 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 "markvis" agent skill from https://github.com/geekplux/markvis/tree/master/skills/markvis into .cursor/skills/markvis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "markvis", 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/geekplux/markvis.git --path skills/markvis--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 geekplux/markvis --skill markvis -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install geekplux/markvis markvis --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/geekplux/markvis.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/markvis .gemini/skills/markvis && 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 "markvis" agent skill from https://github.com/geekplux/markvis/tree/master/skills/markvis into .gemini/skills/markvis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "markvis", 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 geekplux/markvis markvisInstalls 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 geekplux/markvis --skill markvis -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/geekplux/markvis.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/markvis .github/skills/markvis && 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 "markvis" agent skill from https://github.com/geekplux/markvis/tree/master/skills/markvis into .github/skills/markvis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "markvis", 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 geekplux/markvis --skill markvis -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install geekplux/markvis markvis --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/geekplux/markvis.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/markvis .opencode/skills/markvis && 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 "markvis" agent skill from https://github.com/geekplux/markvis/tree/master/skills/markvis into .opencode/skills/markvis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "markvis", 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
markvis- GitHub stars
- 1.6k
- Token cost
- ~786 tokens
- SKILL.md length
- 126 words
- Files
- 1
- Skills in repo
- 1
- Repo updated
- First seen
- Licence
- MIT
At a glance
A skill your agent uses when the user wants a chart of numbers in Markdown (bar, line, area, scatter, pie, hist, heatmap, funnel, waterfall, radar, gauge, sankey, treemap, dumbbell, bullet, boxplot…
- The user wants a chart of numbers in Markdown (bar
- SKILL.md covers When to use, When not to use and Fence shape
- Needs E_DUP_KEY
- Calendar) from a table — emit a Markdown code block tagged chart|markvis|vis
What it does
Markvis is an agent skill from geekplux/markvis. Use when the user wants a chart of numbers in Markdown (bar, line, area, scatter, pie, hist, heatmap, funnel, waterfall, radar, gauge, sankey, treemap, dumbbell, bullet, boxplot, calendar) from a table — emit a Markdown code block tagged chart|markvis|vis, never a flowchart pie/xychart, never a PNG, never Vega-Lite JSON as the default.
Its SKILL.md is about 790 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Documents & Office, covering Markdown and Diagrams. The repository describes itself as: Charts in Markdown. The fence is the data. The licence is MIT.
When your agent uses it
- The user wants a chart of numbers in Markdown (bar
- Calendar) from a table — emit a Markdown code block tagged chart|markvis|vis
- Never a flowchart pie/xychart
- Never Vega-Lite JSON as the default
Example prompts
- “/markvis”
Requirements
- A credential in E_DUP_KEY
What it can do on your machine
Read from SKILL.md and the folder at commit d0121e1. 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.
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 these keys or tokens, usually read from environment variables:
E_DUP_KEY
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Markvis loads about 786 tokens when it runs. Until then it costs about 86 tokens; SKILL.md has 126 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 geekplux/markvis at commit d0121e1, republished under its MIT licence (© geekplux). 126 words, ~786 tokens.
Download SKILL.mdSave it as
.claude/skills/markvis/SKILL.md (or your agent's skills folder).- name
- markvis
- description
- Use when the user wants a chart of numbers in Markdown (bar, line, area, scatter, pie, hist, heatmap, funnel, waterfall, radar, gauge, sankey, treemap, dumbbell, bullet, boxplot, calendar) from a table — emit a Markdown code block tagged chart|markvis|vis, never a flowchart pie/xychart, never a PNG, never Vega-Lite JSON as the default.
markvis
Charts of numbers in Markdown. The table is the source (comma-separated rows or a Markdown table). Tags chart, markvis, and vis are the same language. Types: bar line area scatter pie hist heatmap funnel waterfall radar gauge sankey treemap dumbbell bullet boxplot calendar.
When to use
- Numbers in a doc need a chart and the rows must stay editable.
- An agent should be able to add a row, change
type, and regenerate. - Readers without a plugin still need the table.
When not to use
- Flowcharts, sequence, state, ER → a structure diagram tool.
- Invented PNG / screenshot as the source of truth.
- Vega-Lite / ECharts JSON as the default artifact (optional later
engine:, not core). - Invented type ids (
donut,sunburst,chord,stacked-baras its own type).
Fence shape
```chart
markvis: 2
type: bar
title: Q3 Revenue
unit: USD k
x: month
y: revenue
month,revenue
Jan,120
Feb,180
Mar,150
Optional `theme:`: `folio` (default) `highcharts` `shadcn` `docs` `ant` `recharts` `graphite` — grammar packs only, no chart runtimes.
Optional `palette:`: `ink` `porcelain` `warm` `cool` `vivid` — colors only. Omit → theme default colors. Unknown → `E_UNKNOWN_PALETTE` + table. Never merge palette into the theme id.
Optional `surface:`: `light` (default) `dark` `export`.
Optional `orient: horizontal` on `bar` only, for long category labels. Omit means vertical.
`markvis` other than `2` is `E_BAD_VERSION`. Omit means 2.
Do not turn `N/A`, blanks, or other text into zero. Non-numeric measure cells are `E_BAD_NUMBER`. An empty cell is `E_MISSING_VALUE` when the chart needs every value. Repeated category/series keys are `E_DUP_KEY` (scatter, hist, and waterfall steps may repeat). A sankey cycle is `E_SANKEY_CYCLE`. A calendar date that is not `YYYY-MM-DD` or does not exist is `E_BAD_DATE`.
Also: GFM table after the blank line; or `<!-- chart: bar x=month y=revenue title="Q3" -->` immediately followed by a GFM table.
## Eight few-shots
Copy from `examples/valid/` (keep fences identical):
1. `01-bar-basic` — bar + unit + CSV
2. `02-line-multi` — line + `series`
3. `03-area-basic` — area, tag `vis`
4. `04-scatter-basic` — scatter
5. `05-pie-raw` — pie (do not normalize; 40+35+30)
6. `06-hist-basic` — hist
7. `07-bar-gfm` — GFM table as data
8. `08-bar-comment` — HTML comment + table
## Anti-patterns
| Don’t | Do |
| --- | --- |
| Flowchart `pie` / `xychart` for tables | markvis fence |
| JSON array as the data body | CSV or GFM table |
| Sort categories “to look nice” | Keep input row order |
| Force pie slices to 100 | Leave values as-is |
| Drop the table on error | Table + one-line error code |
| Emit PNG by default | Emit the fence |© geekplux, 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 skills/markvis of geekplux/markvis.
Open the folder on GitHubat commit d0121e1
Compare with similar skills
Markvis 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 |
|---|---|---|---|---|---|---|
| Markvis this skillgeekplux/markvis | 1.6k | — | ~786 | Automated safety check: Pass | MIT | |
| Smalldocs Authorespressoplease/smalldocs | 209 | — | ~1.1k | Automated safety check: Pass | Custom licence | |
| Writing Markdownasymmetric-research/solana-exporter | 133 | — | ~576 | Automated safety check: Pass | Apache-2.0 | |
| Markdown Syntax Guideantdigital-ai/agentic-ui | 224 | — | ~3.1k | Automated safety check: Pass | MIT | |
| Markdown Report WritingNeuroAIHub/BrainPilot | 1.1k | — | ~2.6k | Automated safety check: Warn | AGPL-3.0 | |
| Axiom Explainerdigoal/blog | 8.6k | — | ~3.6k | Automated safety check: Pass | GPL-2.0 |
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Related
Categories
Questions about Markvis
What does Markvis do?
A skill your agent uses when the user wants a chart of numbers in Markdown (bar, line, area, scatter, pie, hist, heatmap, funnel, waterfall, radar, gauge, sankey, treemap, dumbbell, bullet, boxplot…. Markvis is an agent skill from geekplux/markvis. Use when the user wants a chart of numbers in Markdown (bar, line, area, scatter, pie, hist, heatmap, funnel, waterfall, radar, gauge, sankey, treemap, dumbbell, bullet, boxplot, calendar) from a table — emit a Markdown code block tagged chart|markvis|vis, never a flowchart pie/xychart, never a PNG, never Vega-Lite JSON as the default.
When should I use Markvis?
Markvis fits situations like: the user wants a chart of numbers in Markdown (bar; calendar) from a table — emit a Markdown code block tagged chart|markvis|vis; never a flowchart pie/xychart; never Vega-Lite JSON as the default.
How do I install Markvis in Claude Code?
Run `npx skills add geekplux/markvis --skill markvis -a claude-code`. Or copy the skill folder (skills/markvis in geekplux/markvis) into .claude/skills/markvis in your project. Claude Code loads it when a task matches its description.
How do I install Markvis in Codex?
Run `npx skills add geekplux/markvis --skill markvis -a codex`. Or copy the skill folder (skills/markvis in geekplux/markvis) into .agents/skills/markvis in your project. Codex loads it when a task matches its description.
Can I use Markvis 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 geekplux/markvis --skill markvis -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/markvis, .gemini/skills/markvis, .github/skills/markvis and .opencode/skills/markvis in your project.
What does Markvis need to run?
Going by SKILL.md and its folder, Markvis needs credentials named E_DUP_KEY. Our summary lists: A credential in E_DUP_KEY.
Does Markvis 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 Markvis 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 Markvis use?
Markvis 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 Markvis use?
About 786 tokens (SKILL.md is roughly 3.1k 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 Markvis?
Skills that share tags, products or a category with Markvis: Smalldocs Author (espressoplease/smalldocs, 209 stars), Writing Markdown (asymmetric-research/solana-exporter, 133 stars), Markdown Syntax Guide (antdigital-ai/agentic-ui, 224 stars) and Markdown Report Writing (NeuroAIHub/BrainPilot, 1.1k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Markvis?
geekplux (a GitHub user) maintains it in geekplux/markvis, which has 1,598 GitHub stars. The repository was last updated on October 8, 2026.
Source: geekplux/markvis on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.