/learning-path

Generate an optimal learning sequence for a target note

# Learning Path

Generate an optimal learning sequence for a target note by tracing prerequisite chains through the knowledge graph.

## 0. Locate AZKG Repository

**Check for AZKG_REPO_PATH environment variable:**

- Use bash conditional: `if [ -z "$AZKG_REPO_PATH" ]; then REPO_PATH=$(pwd); else REPO_PATH="$AZKG_REPO_PATH"; fi`
- **If AZKG_REPO_PATH is set:** Use that path as the repository root
- **If AZKG_REPO_PATH is not set:** Use current working directory (pwd)
- Store result as REPO_PATH for all subsequent file operations

**All file operations must use REPO_PATH:**

- Read: `Read(RE...