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mermaid vs hermes-agent

mermaid and hermes-agent share 4 technologies: js-yaml, D3, dompurify, and katex. mermaid is written in TypeScript and hermes-agent in Python.

Read it as markdown

What they share and what sets them apart

mermaid-js

mermaid

Generation of diagrams like flowcharts or sequence diagrams from text in a similar manner as markdown

TypeScript91kRead on November 4, 2026, at commit 63333fdWhat is mermaid built with?

In common

Only in mermaid

  • markdown-table
  • sharp
  • stylis
  • roughjs
  • dagre-d3-es
  • cytoscape
  • cytoscape-cose-bilkent
  • cytoscape-fcose
  • elkjs
  • @braintree/sanitize-url
  • marked
  • Ajv

Only in hermes-agent

Side by side

SizeLines written by people and agents, without generated ones; code files, without tests.
mermaid232,641 lines written670 code files
hermes-agent3,858,936 lines written5,274 code files
Who writes itA commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
mermaid5.1% of its commits signed by AIWith Claude Code, Codex, Cursor, GitHub Copilot, and CodeRabbit
hermes-agent2.2% of its commits signed by AIWith Claude Code, Cursor, Codex, GitHub Copilot, Devin, OpenHands, Factory, Jules, and Crush
ActivityFrom GitHub and its history, on the day SeeRepo read it.
mermaidLast push November 4, 202611,988 commits91,011 stars
hermes-agentLast push November 4, 202658,269 commits260,334 stars
TestsThe files that test the code, and the share of code files a test imports.
mermaid505 test files40.1% of its code files have a test that imports them
hermes-agent10,042 test files65.7% of its code files have a test that imports them

Frequently asked questions

Which is bigger, mermaid or hermes-agent?
hermes-agent, with 3,858,936 lines written; mermaid has 232,641.

The proof: NousResearch/hermes-agent's code at commit 71736c9

Which has more GitHub stars, mermaid or hermes-agent?
hermes-agent, with 260,334 stars; mermaid has 91,011.

The proof: NousResearch/hermes-agent on GitHub

Which has more tests, mermaid or hermes-agent?
hermes-agent, with 10,042 test files; mermaid has 505.

The proof: NousResearch/hermes-agent's code at commit 71736c9

Which was updated more recently, mermaid or hermes-agent?
Both got their last push on November 4, 2026.

The proof: mermaid-js/mermaid's commits on GitHub

Which has more commits signed by AI, mermaid or hermes-agent?
mermaid: an AI signed 5.1% of its commits, with Claude Code, Codex, Cursor, GitHub Copilot, and CodeRabbit; in hermes-agent, 2.2%.

The proof: the commits each tool signed in mermaid-js/mermaid

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