dompruner

English | 한국어

DOM AST middleware for LLM web pipelines — sits between raw HTML and your model, strips nav/ads/scripts via AST parsing, delivers original content token-efficient.

When an LLM agent fetches a web page, it receives tens of thousands of raw HTML tokens it doesn't need — navigation, ads, scripts, footers. dompruner strips all of that via DOM AST parsing and passes the original content, unchanged, directly to the model. No intermediate summarization model, no API key, no vector database.

> docs.python.org/3/library/asyncio-task.html  (query: "create_task")
> Raw HTML   44,315 tokens
> dompruner   1,275 tokens  (97.1% reduction, BM25 section filter applied)

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Install

pip install dompruner

For JavaScript-rendered pages (optional):

pip install "dompruner[playwright]" && playwright install chromium

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Usage

CLI

python -m dompruner https://docs.python.org/3/library/asyncio-task.html
python -m dompruner https://docs.python.org/3/library/asyncio-task.html "create_task"
python -m dompruner https://docs.python.org/3/library/asyncio-task.html --json

Python

import asyncio
from dompruner import run_pipeline

result = asyncio.run(run_pipeline(
    "https://docs.python.org/3/library/asyncio-task.html",
    query="create_task",
))
print(result.markdown)
print(f"{result.original_tokens:,} → {result.refined_tokens:,} tokens ({result.reduction_ratio:.1%})")
print(result.meta)  # {'title': '...', 'lang': 'en', 'description': '...', ...}

LangChain

from dompruner.langchain import DomPrunerLoader

docs = DomPrunerLoader(
    "https://fastapi.tiangolo.com/tutorial/body/",
    query="request body",
).load()
# docs[0].metadata includes: source, render_type, reduction_ratio,
#   bm25_confidence, cached, title, description, lang, author, ...

→ Full LangChain integration guide — Loader, BatchLoader, SitemapLoader, Retriever, Tool

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How It Works

URL → fetch (httpx → UA rotation → Playwright) → render type detection
       └─ SSG: __NEXT_DATA__ RSC tree walk → Markdown
       └─ SSR/CSR: DOM AST pipeline
                    L1 FQN Router → L2 Heading Cluster → L3 CETD Engine
                    → BM25+ Section Filter → Compact Markdown

→ Architecture & internals

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Related

• dompruner-mcp — MCP server for Claude Code, Claude Desktop, Cursor, Windsurf. Zero install — npx -y dompruner-mcp.
• LangChain integrations — listed as a third-party web loader.

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License

MIT