ai-sessions is a local-first analytics dashboard for Claude Code sessions. It parses JSONL files from ~/.claude/projects/, calculates usage, cost, token, tool, and productivity metrics, and serves a React dashboard with live WebSocket updates. It includes REST APIs, drill-down views, KPI cards, token trends, session explorer, tool usage insights, hourly activity charts, context health tracking, and prompt optimization insights to help developers and teams reduce AI spend.