Initial import: SharePoint Lists skill

Claude Code skill for SharePoint Lists CRUD via Microsoft Graph (app-only auth): reusable graph.mjs client, sp.mjs CLI, and setup + API reference docs.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

README.md

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+# Claude-SharepointLists
+
+A [Claude Code](https://claude.com/claude-code) skill for connecting to
+**Microsoft SharePoint Lists** via the Microsoft Graph API, with full read/write
+(CRUD) over list items using **app-only (client-credentials)** authentication.
+
+## What's here
+
+```
+.claude/skills/sharepoint-lists/
+├── SKILL.md                 # how the skill works + usage
+├── .env.example             # credential template (copy to .env; .env is git-ignored)
+├── scripts/
+│   ├── sp.mjs               # CLI: test | lists | columns | items | get | create | update | delete
+│   └── lib/graph.mjs        # reusable, dependency-free Graph client (SharePointListsClient)
+└── references/
+    ├── setup.md             # Azure AD (Entra) app registration walkthrough
+    └── graph-api.md         # field-type formats + OData query reference
+```
+
+## Quick start
+
+1. Create an Entra app registration and grant it a SharePoint Graph permission
+   (`Sites.Selected` preferred). See
+   [`references/setup.md`](.claude/skills/sharepoint-lists/references/setup.md).
+2. Copy `.env.example` to `.env` and fill in `SP_TENANT_ID`, `SP_CLIENT_ID`,
+   `SP_CLIENT_SECRET` (optionally `SP_SITE_URL`).
+3. Verify connectivity:
+
+   ```bash
+   cd .claude/skills/sharepoint-lists/scripts
+   node sp.mjs test --site "https://<tenant>.sharepoint.com/sites/<SiteName>"
+   ```
+
+## Security
+
+Credentials live only in `.env`, which is git-ignored — **never commit secrets**.
+The Graph + auth logic is isolated in `scripts/lib/graph.mjs` so it can later be
+wrapped as a standalone MCP server without a rewrite.