feat(plugins): Microsoft Workflows Pack v0 (Graph, Win+Mac universal)

[rrader26]

Summary

• First external pack built on the AgentMarkPlugin contract — cross-platform Outlook + OneDrive via Microsoft Graph.
• Device-code OAuth (RFC 8628) with on-disk refresh-rotated token cache.
• Excel/Word native drivers come in PR B (stacked).

Tools shipped (10)

Surface	Tools
Auth	agentmark_microsoft_login, ..._logout, ..._whoami
Outlook	agentmark_outlook_send_email, ..._search, ..._get_message, ..._reply
OneDrive	agentmark_onedrive_list, ..._upload, ..._download

Why

First validation of the plugin contract by a real external pack. Establishes the auth pattern (device-code + persistent cache) and the Graph HTTP client that the rest of the Microsoft surface (Teams, Calendar, SharePoint) will reuse. Cross-platform identical because every call hits Graph rather than COM/AppleScript.

Setup (one-time)

1. Register an Azure AD app at https://entra.microsoft.com
   • Account types: Accounts in any organizational directory and personal Microsoft accounts
   • Allow public client flows: Yes (required for device-code)
   • API permissions (delegated): Mail.Send, Mail.ReadWrite, Files.ReadWrite, offline_access, User.Read
2. Set AGENTMARK_MS_CLIENT_ID=<your-client-id> or pass clientId to createMicrosoftPlugin().

Opt-in usage

Pack is not part of the default plugin set — explicitly include it:
```ts
import {
createMcpServer,
createWebPlugin, createPdfPlugin, createDesktopPlugin, createMetaPlugin,
createMicrosoftPlugin,
} from '@thinkfleet/agentmark'

const web = createWebPlugin()
const pdf = createPdfPlugin()
const desktop = createDesktopPlugin()
const microsoft = createMicrosoftPlugin() // reads AGENTMARK_MS_CLIENT_ID
const meta = createMetaPlugin([web, pdf, desktop, microsoft])

createMcpServer({ plugins: [web, pdf, desktop, microsoft, meta] })
```

Test plan

• pnpm build clean
• pnpm test — 338 pass / 10 skip (12 new tests for auth + handlers via mocked fetch)
• Manual: register Azure app, run agentmark_microsoft_login, send a test email
• Manual: upload a 6MB file to OneDrive to exercise the resumable-upload path

🤖 Generated with Claude Code