- README: Add HFP AG to features, tools table (8 tools), architecture diagram, project structure, and roadmap. Update total from 61 to 69. - Docs site: Create reference page (hfp-ag-tools.md) and practical guide (hfp-ag.md) covering AG enable, call simulation, volume, indicators, AT commands, and E2E test flow. - Update tools overview, architecture, introduction, and sidebar to include HFP AG category.