Hackathon [Feature]: Add Xero data-source connector

Problem Statement

cognee has five data-source connectors today (confluence, gmail, google-drive, notion, slack) against roughly 120 planned. Data sources are the thinnest surface in the project.

Xero is on the roadmap and has no connector.

Proposed Solution

Add a xero connector under packages/connector/xero/ in cognee-community, following the shape of the five existing connectors.

• Auth: OAuth 2.0
• Ingest: invoices, contacts, and notes
• Incremental sync: If-Modified-Since header
• Forget-on-delete: deleting upstream must remove the record from the graph on the next sync

Watch out for

Tokens expire in 30 minutes and refresh handling is mandatory, not optional.

Package layout to follow

packages/connector/xero/
├── README.md
├── cognee_community_connector_xero/
│   ├── __init__.py
│   └── xero.py
├── examples/
├── tests/
└── pyproject.toml

Read packages/connector/notion/ first — it is the closest working reference.

Acceptance Criteria

• A user connects via OAuth 2.0 and selects what to ingest
• Selected content is ingested and searchable in cognee
• Incremental sync picks up only what changed since the last run
• Deleting the source upstream removes it from the graph on the next sync
• README with setup steps and a runnable example under examples/
• Tests covering the ingest path and the incremental cursor

Context

Part of the cognee hackathon connector push. Difficulty: Advanced (H) — enterprise-gated account or a legacy API — claim only if you already have access