·holaryn-owner
Holaryn Agent v0.12.4 Nightly: Capability Fabric 2.0 private preview
Holaryn Agent v0.12.4 Nightly is now available. This release introduces Capability Fabric 2.0 as a private preview, building on v0.12.3 with a safer and more consistent way for the agent to understand and use its capabilities.
What changed
- A unified, versioned catalog now describes native tools, MCP servers, Connected Apps, skills, commands, plugins, extensions, provider-hosted tools, web retrieval, workflows, and remote agents.
- Session-scoped authorization, bounded adaptive discovery, and verified model/provider strategy negotiation make capability selection more deliberate and auditable.
- Account-scoped secret leases, sandboxed orchestration, and secure agent-to-agent interoperability strengthen execution boundaries.
- The new accessible Capability Center gives users a clearer view of available capabilities and their authority state.
- Migration, rollback, privacy-safe observability, and deterministic release gates help teams evaluate the preview without replacing the established runtime.
Private-preview boundary
Capability Fabric 2.0 is disabled by default in this Nightly. Approved preview cohorts can enable it with HOLARYN_CAPABILITY_FABRIC_V2=true. The existing v0.12.3 runtime remains the execution and approval authority while the preview is evaluated.