Principal Product Manager on the Microsoft 365 Copilot Extensibility team, helping full-stack developers build declarative agents. With nearly two decades in the Microsoft ecosystem, Sébastien focuses on developer experience for Copilot for Microsoft 365, TypeSpec, and Kiota. He shares insights, stories, and ideas around the Microsoft 365 development platform.
Combine the meta-workflow of using coding agents with Agents Toolkit Skills from the Work IQ marketplace to scaffold, configure, deploy, and localize declarative agents through natural language.
Learn why production Copilot agents need pro-code tooling: source control, CI/CD, testing, and engineering discipline beyond low-code platforms.
Automate provisioning, deploying, and publishing declarative agents using GitHub Actions, Azure DevOps, and the Microsoft 365 Agents Toolkit CLI.
Build declarative agents that work across languages with tokenized manifests, localizationInfo, and culturally adapted instructions.
Learn how environment variables, .env files, and multi-environment configuration work in the Microsoft 365 Agents Toolkit for declarative agents.
March brought MCP Apps, GPT-5.2, and Agents Toolkit v6.6.0. Declarative agents aren't just talking anymore, they're rendering dashboards in chat.
Ship declarative agents to production in Microsoft 365 Copilot: admin approval, access control, staged rollouts, and governance best practices.
Troubleshoot the four most common declarative agent failure patterns in Microsoft 365 Copilot: from ignored APIs to auth errors and permission issues.
Learn how to scale your declarative agent with connected agents: delegate to specialist worker agents using a microservices architecture for AI assistants.
Configure behavior overrides in declarative agents to prioritize knowledge sources, reduce hallucination, and control follow-up suggestions in M365 Copilot.
Add AI disclaimers to declarative agents to build user trust and satisfy compliance requirements. Includes full manifest config and writing tips.
Connect existing MCP servers to your declarative agents as plugins, with OAuth authentication, and let Copilot orchestrate them alongside knowledge sources.
Connect your declarative agent to REST APIs using OpenAPI specs and API plugin manifests to read live data and take real actions with Microsoft 365 Copilot.
Learn how to give your declarative agent access to external websites, from unscoped web search to curated site lists, and why scoping matters for quality results.
February was quiet, but one community walkthrough reframed the entire declarative agents developer story. Plus: scanned PDF grounding shipped.
Learn how to ground your declarative agent in Teams messages using the TeamsMessages capability to surface peer wisdom from group chats, 1:1 conversations, and channel threads.
Add org chart awareness, colleague skills, and collaboration context to your declarative agent using the zero-config People capability.
Connect your declarative agent to structured data from HRIS systems, databases, and external platforms using Copilot connectors (formerly Graph connectors).
Configure the Email capability to ground your declarative agent in personal mailboxes, shared mailboxes, and specific folders for precise, scoped answers.
Add image generation to your declarative agent using the GraphicArt capability for welcome cards and creative content.
Enable Code Interpreter in your declarative agent for precise calculations, data analysis, and visualizations: all with a single line of JSON.
January was quiet post-Ignite, but the first hands-on MCP auth tutorial for declarative agents landed and GPT-5.1 rolled out under the hood.
Connect your declarative agent to SharePoint document libraries for cited, grounded answers with automatic permission enforcement.
Learn how to bundle documents directly in your declarative agent's app package using the EmbeddedKnowledge capability: no SharePoint or cloud storage required.
Create conversation starters that showcase your declarative agent's capabilities and guide users to high-value interactions from the very first message.
Master the 5-part instruction framework that turns a generic declarative agent into a purpose-built AI assistant, with real examples from Zava Insurance.
Learn how to scaffold your first declarative agent using the Agents Toolkit: from project creation to a working deploy in minutes.
Understand what declarative agents are, how they work, and when to use them: the foundational guide to building AI agents for Microsoft 365 Copilot.
Introducing The Manifest, a blog dedicated to Microsoft 365 Copilot extensibility, declarative agents, and the hidden gem of the M365 platform.