# ThoughtLint > ThoughtLint is a local-first Obsidian plugin that analyzes Markdown notes for weak reasoning, vague claims, unsupported statements, missing assumptions, and incomplete action plans. ThoughtLint is designed for people who use notes to make decisions, write specs, run meetings, and plan strategy. Its default mode is deterministic and local. No user data leaves the device unless the user explicitly enables optional external features and confirms the request. ## Primary - [Home](https://thoughtlint.dasgroupllc.com/): Landing page with product overview, local checks, privacy model, and FAQ. ## Product Facts - [What ThoughtLint is](https://thoughtlint.dasgroupllc.com/#what-it-is): Short answer about the product, target user, and value proposition. - [What ThoughtLint checks](https://thoughtlint.dasgroupllc.com/#checks): Local deterministic checks for vague wording, unsupported claims, missing conclusions, missing next steps, and incomplete specs or plans. - [Privacy model](https://thoughtlint.dasgroupllc.com/#privacy): Explains what stays local and what optional external actions require. - [FAQ](https://thoughtlint.dasgroupllc.com/#faq): Direct answers to common questions about AI use, privacy, supported note types, and outputs. ## Optional - [LLMs full context](https://thoughtlint.dasgroupllc.com/llms-full.txt): Expanded product facts and FAQ in a single Markdown file.