Declarative agent manifest v1.9 adds Agent Skills and Fabric grounding
Microsoft’s Microsoft 365 Copilot developer documentation, updated October 22, documents declarative agent manifest schema v1.9.
Compared with v1.8, the schema adds an agent_skills property that can reference packaged skill directories containing SKILL.md files, and a Fabric capability that lets declarative agents ground responses in Microsoft Fabric data.
The manifest remains the machine-readable definition used inside Microsoft 365 app packages.
This matters to software companies and developers building or validating declarative agents; it is a documentation and schema update, not a separate statement that every dependent capability is generally available.
Partner briefing
- What it is
Declarative agent manifest schema v1.9 for Microsoft 365 Copilot.
- What’s changing
Compared with v1.8, v1.9 adds agent_skills references and a Fabric grounding capability.
- Why it matters
Developers should validate manifests and packaging against the new schema while treating dependent capability availability separately.
- Who it affects
ISVs and developers building declarative agents for Microsoft 365 Copilot.