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claude-code

Asi mermaid-reverse-attempt

Mermaid URL codec - encodes/decodes #base64: (amp CLI) and #pako: (mermaid.live) formats

install
source · Clone the upstream repo
git clone https://github.com/plurigrid/asi
Claude Code · Install into ~/.claude/skills/
T=$(mktemp -d) && git clone --depth=1 https://github.com/plurigrid/asi "$T" && mkdir -p ~/.claude/skills && cp -r "$T/plugins/asi/skills/mermaid-reverse-attempt" ~/.claude/skills/plurigrid-asi-mermaid-reverse-attempt && rm -rf "$T"
manifest: plugins/asi/skills/mermaid-reverse-attempt/SKILL.md
source content

Mermaid Reverse Attempt

Encode diagrams to shareable URLs, decode URLs back to source.

Formats Discovered

PrefixSourceMethod
#base64:
amp CLI
JSON.stringify({code}) → base64
#pako:
mermaid.live
pako.deflate(JSON.stringify({code})) → base64

Usage

# Encode diagram to pako URL (compressed)
node scripts/codec.js encode-pako < diagram.mmd

# Encode to base64 URL (amp style)
node scripts/codec.js encode-base64 < diagram.mmd

# Decode URL to diagram
node scripts/codec.js decode "https://mermaid.live/edit#pako:..."

Quick Reference

// Decode
const hash = url.split('#')[1];
if (hash.startsWith('pako:')) {
  return JSON.parse(pako.inflate(Buffer.from(hash.slice(5), 'base64'), {to:'string'})).code;
}
if (hash.startsWith('base64:')) {
  return JSON.parse(Buffer.from(hash.slice(7), 'base64').toString()).code;
}

// Encode pako
`https://mermaid.live/edit#pako:${Buffer.from(pako.deflate(JSON.stringify({code:diagram}))).toString('base64')}`

GF(3)

  • Trit: 0 (ERGODIC)
  • decode ∘ encode = id