marginalia
Renders Markdown into a browser-based, click-to-comment thread; comments are returned to Claude as tool results.
README
marginalia
A Claude Code skill: render any Markdown into a browser-based, click-to-comment
thread. Comments return to Claude as clean MCP tool_results; replies render as
in-page cards that are themselves annotatable (threaded).
Install
As a Claude Code plugin (recommended):
/plugin marketplace add Jin-HoMLee/marginalia
/plugin install marginalia@marginalia
# restart Claude Code
The bundled .mcp.json registers the MCP server automatically. If Python deps
are missing, run python3 -m pip install -r requirements.txt.
Manual (skill + MCP at user scope, no plugin):
python3 -m pip install -r requirements.txt
./scripts/register.sh # registers the MCP server at user scope
# restart Claude Code
Test
python3 -m pytest -v
Architecture
One process, two faces: a FastMCP stdio server (the tools Claude calls) and a
localhost HTTP server (serves the page, receives comments). They share one
in-process ThreadStore. See
docs/superpowers/specs/2026-06-16-marginalia-mcp-skill-design.md
for the full design and
docs/superpowers/plans/2026-06-16-marginalia-mcp-skill.md
for the build plan.
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