0.21.0 — Fable Features & Integrated MCP

Added: Integrated MCP Server (kandown mcp) — stdio JSON-RPC 2.0 server for MCP hosts (Claude Desktop, VSCode, Glama, etc.) exposing list_tasks, get_task, create_task, move_task, update_task, add_report, list_columns.
Added: Full TUI CRUD & Workflow (kandown board) — interactive creation (n with inline syntax), editing in $EDITOR (e), archiving (x), deletion with prompt (D), fuzzy search (/), filter cycling (f), cheatsheet modal overlay (?), and undo (u).
Added: Diagnostic command kandown doctor [--fix] — checks CLI/HTML version alignment, daemon liveness, port status, kandown.json validity, frontmatter syntax, and auto-resolves duplicate task files.
Added: Multi-project Manager (kandown projects) — scans active localhost daemons (ports 2048-2150) and lists running instances with PID, port, and project paths (--json supported).
Added: Real-Time SSE (GET /api/events) — Server-Sent Events endpoint backed by chokidar file watcher for instant live updates in the web UI when agents or CLI edit task files.
Added: Quick-Add Inline Parser — parse #tag, @assignee, p1-p4, due:date, +t12 directly from title strings across web UI, TUI, and kandown create.
Added: Web Multi-Selection & Floating Action Bar (BulkActionBar) — select multiple tasks with Cmd/Ctrl/Shift click or checkboxes to bulk move or delete tasks in one click.
Added: WIP Limits & Visual Indicators — column limits (board.wipLimits) with warning badges when limits are exceeded.
Added: Swimlanes & Group By Selector — filter bar dropdown to group board tasks by Priority, Assignee, or Epic.
Added: Épics (epic: <id>) & Task Templates — frontmatter epic tracking with card badges, and .kandown/templates/*.md card template loading.
Added: Due Dates & Calendar View — overdue and upcoming due-date summary banner in ListView.
Added: Import & Export (kandown export / kandown import) — export board to JSON or CSV, and import from Trello JSON exports or Markdown headers.
Added: Git Task Timeline API (GET /api/git/history) — endpoint serving task modification history (git log --follow).
Added: Outgoing Webhooks (notifications.webhookUrl) — POST JSON notifications on status changes to Slack, Discord, or n8n.
Added: Enriched Agent Context & Config — readAgentDoc automatically injects recent task git commits into agent instructions, and agent.extraArgs is configurable in Web & CLI Settings.
Changed: TUI move context menu proposes the next column to the right by default for natural left-to-right Kanban flow.