GitHub repositories · by Tomas Varga

Made a Claude Code mod because I was tired of asking Claude to redo my charts as

Name: Made a Claude Code mod because I was tired of asking Claude to redo my charts as
Author: Tomas Varga

Made a Claude Code mod because I was tired of asking Claude to redo my charts as ASCII. Now every diagram gets pinned above the prompt. Expand it, go full screen, see it rendered with Mermaid, or open it in the browser. https://t.co/CsxGUvCMkV

Tomas Varga@tomasvarga_dev

Translated

About this mod

Made a Claude Code mod because I was tired of asking Claude to redo my charts as ASCII.

Now every diagram gets pinned above the prompt. Expand it, go full screen, see it rendered with Mermaid, or open it in the browser. https://t.co/CsxGUvCMkV

Installation

Check the author's README for the marketplace and plugin name first. Commands may change as the repository evolves.

claude plugin marketplace add tomasvarga/claude-code-diagrams
claude plugin install diagrams@claude-code-diagrams

Original text / README

Made a Claude Code mod because I was tired of asking Claude to redo my charts as ASCII.

Now every diagram gets pinned above the prompt. Expand it, go full screen, see it rendered with Mermaid, or open it in the browser. https://t.co/CsxGUvCMkV

Project information

Author: Tomas Varga
Use cases: Workflows & CI
Added: Oct 11, 2026
Source updated: Oct 11, 2026
Stars: 1
Permission footprint: L3
views: 0
Source engagement:: 2 likes · 142 views

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Permission footprint

Automatically scanned data. Review the source before installing. Levels describe capabilities, not a safety certification.

Intercept tool calls
Environment variables
Write files
Execute commands
Read files
Network access

View matches (19）

Intercept tool calls · line165 linehooks/register.tsxon('tool.call', { tool: 'mcp__diagrams__show_diagram' }, async ($, e) => {

Environment variables · line453 linehooks/register.tsxconst folder = ((await $.env.get('TMPDIR')) ?? '/tmp').replace(/\/$/, '')

Write files · line455 linehooks/register.tsxawait $.fs.write(`${name}.mmd`, mermaid)

Execute commands · line459 linehooks/register.tsxconst isDone = await $.process.run(argv, { timeoutMs: RENDER_TIMEOUT_MS }).then(

Read files · line465 linehooks/register.tsxconst { base64 } = await $.fs.read(`${name}.png`, { as: 'bytes' })

Execute commands · line520 linehooks/register.tsx

const run = (argv: string[]) => $.process.run(argv).then(r => (r.exitCode === 0 ? r.stdout : undefined), () => undefined)

Environment variables · line521 linehooks/register.tsxconst herdrPane = await $.env.get('HERDR_PANE_ID')

Environment variables · line524 linehooks/register.tsxconst herdr = (await $.env.get('HERDR_BIN_PATH')) || 'herdr'

Environment variables · line535 linehooks/register.tsxconst tmuxPane = await $.env.get('TMUX_PANE')

Execute commands · line552 linehooks/register.tsxconst run = (argv: string[]) => $.process.run(argv).catch(() => undefined)

Environment variables · line555 linehooks/register.tsxconst herdrPane = await $.env.get('HERDR_PANE_ID')

Environment variables · line556 linehooks/register.tsxconst herdr = (await $.env.get('HERDR_BIN_PATH')) || 'herdr'

Environment variables · line562 linehooks/register.tsxconst tmuxPane = await $.env.get('TMUX_PANE')

Environment variables · line583 linehooks/register.tsxconst folder = ((await $.env.get('TMPDIR')) ?? '/tmp').replace(/\/$/, '')

Read files · line588 linehooks/register.tsx? await $.fs.read(diagram.picture.path, { as: 'bytes' }).then(read => read.base64, () => undefined)

Write files · line590 linehooks/register.tsxawait $.fs.write(path, page(diagram, picture))

Execute commands · line594 linehooks/register.tsxconst opened = await $.process.run([opener, path]).then(

Network access · line792 linehooks/register.tsxconst blob = await (await fetch(img.src)).blob()

Execute commands · line839 linehooks/register.tsxif (await $.process.run(argv).then(run => run.exitCode === 0, () => false)) {

Made a Claude Code mod because I was tired of asking Claude to redo my charts as

About this mod

Installation

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