v0.6.3

## What's New

- add skill self-improvement and pipeline tool (closes #3683)
- add Windows setup batch file and guide (closes #3693)
- anthropic: add SSE streaming support for chat responses
- channels: notify user when provider fallback occurs
- ci: add Discord release announcements
- cli: add service logs command for systemd/launchd/Windows
- cli: add streaming output and Ctrl+C cancellation to agent REPL
- config: add MultiMessage streaming mode and Matrix streaming config
- config: make max_tokens configurable per provider
- discord: add Partial and MultiMessage streaming modes
- discord: add provider-level token streaming for real-time delivery
- gateway: implement mutual TLS (mTLS) for high-security deployments
- i18n: add tool descriptions for all 31 README languages
- implement ACP server mode over stdio
- matrix: add Partial and MultiMessage streaming modes
- memory: add BM25 keyword search mode for memory retrieval
- memory: add bulk JSON export for GDPR Art. 20 data portability
- observability: add DORA metrics for deployment tracking
- onboard: default Discord stream_mode to MultiMessage
- provider: parse proxy tool events from SSE stream
- providers: add cost-optimized provider routing strategy
- sandbox: add macOS sandbox-exec (Seatbelt) profiles
- security: add WebAuthn / hardware key authentication
- security: Ed25519 plugin signature verification
- security: wire HMAC-SHA256 signing to audit trail
- slack: add progressive draft message streaming via chat.update
- slack: DraftEvent enum and progressive draft streaming
- tools: add escalate-to-human tool with urgency routing
- tools: expose report template engine as standalone agent tool
- trust: add per-domain trust scoring and regression detection
- voice: real-time voice call support (Twilio/Telnyx)
- web: add responsive mobile sidebar with hamburger toggle
- web: collapsible thinking/reasoning UI and markdown rendering in chat
- web_fetch: add allowed_private_hosts config for SSRF bypass

## Contributors

- 0668000448
- Aleksandr Prilipko
- Argenis
- argenis de la rosa
- bennyzen
- Claude Opus 4.6
- Claude Opus 4.6 (1M context)
- Joe Hoyle
- Nero
- Nim G
- rareba
- Roman Tataurov
- Ryan Tregea
- Shane Engelman
- smallwhite
- Vlad
- windyboy

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*Full changelog: v0.6.2...v0.6.3*