Add CLAUDE.md

CLAUDE.md

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+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## What this repo does
+
+Mintlify-powered product documentation for tracebloc, published at https://docs.tracebloc.io. This is the current production docs site (replacing the older Docusaurus-based `documentation` repo).
+
+## Preview and build
+
+```bash
+npm i -g mint     # Install Mintlify CLI (one-time)
+mint dev          # Local preview at http://localhost:3000
+mint broken-links # Check for broken links
+mint update       # Update CLI to latest version
+```
+
+## Key files
+
+- `docs.json` -- Mintlify configuration (navigation, theme, colors, SEO, footer)
+- `AGENTS.md` -- Existing AI agent instructions (style guide, terminology)
+- Pages are `.mdx` files with YAML frontmatter
+
+## Content sections (defined in docs.json navigation)
+
+- `overview/` -- Platform overview
+- `create-use-case/` -- Prerequisites, dataset prep, defining use cases, templates
+- `join-use-case/` -- Exploring, joining, training, hyperparameters, model optimization/evaluation
+- `environment-setup/` -- Setup guide, configuration, EKS deployment, troubleshooting
+- `tools-help/` -- tracebloc Python package, FAQs, key terms
+
+## Deployment
+
+Push to the default branch; the Mintlify GitHub app auto-deploys to production.
+
+## Style notes (from AGENTS.md)
+
+- Active voice, second person ("you")
+- Sentence case for headings
+- Bold for UI elements, code formatting for file names/commands/paths