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v4.12.0 — MCP client, browser depth, and breadth

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@shivadeore111-design shivadeore111-design released this 01 Jul 09:44
v4.12.0
5549c51

Aiden can now integrate with the outside world and operate with more control, honesty, and safety. This is a large release: two major arcs (MCP client, browser depth) plus a wave of breadth and safety work.

🔌 MCP client

Aiden can now connect out to external MCP servers and call their tools.

  • Connect over stdio and Streamable HTTP
  • Full OAuth 2.0 flow — discovery, dynamic client registration, PKCE, and token refresh
  • Per-server resilience: automatic reconnect, circuit breaker, config-driven tuning
  • Curated server catalog with one-command install
  • MCP tools are model-callable but approval-gated, with results redacted and fenced as untrusted input

🌐 Browser depth

A real state-aware browser layer, built local-first.

  • Accessibility-tree snapshots with stable numbered element handles
  • Act-by-reference (click / type / fill) with semantic re-resolution when elements go stale
  • Destructive-action guard — vanished actions are never blindly retried
  • Screenshot-to-vision path for visual page understanding
  • Attach to an existing local browser or launch one; multi-tab and dialog handling
  • Exfiltration-aware guardrails: secrets are never exposed to the model, private-URL navigation is policed, and destructive actions require confirmation

⚙️ Breadth & safety

  • Cross-session search — full-text search over your past sessions
  • Posture-aware narrowing of skills and tools to cut prompt size
  • Tool-output caps with truncate-then-redact ordering (a secret split across the truncation boundary can't leak)
  • Per-session budget enforcement with graceful, zero-overspend finalization
  • Honest execution-policy model — file guardrails are advisory, not containment; real containment requires Docker, and Aiden now says so plainly
  • Process manager — tracked spawns, reliable tree-kill with no orphans, redacted process listing, reaped on shutdown
  • New /home (live working directory) and /activity (session roll-up) commands
  • Unified per-turn delivery context across messaging platforms; Discord long-message chunking

🐛 Fixes

  • Windows process tree-kill no longer orphans child processes — this also fixes a latent orphan in the MCP transport

Install: npm install -g aiden-runtime · Requires Node 18+ · Windows-first, local-first

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