# Quickstart — Graph Contracts: LIST `$expand` Parity Fix

## Goal
Verify that LIST requests can forward explicit, allowlisted `$expand`, and that the Entra Admin Roles report requests `principal` so it can render real principal display names.

## Run tests (focused)
From repo root (Sail-first):
- `vendor/bin/sail artisan test --compact tests/Unit/GraphContractRegistryTest.php`
- `vendor/bin/sail artisan test --compact tests/Unit/MicrosoftGraphClientListPoliciesSelectTest.php`
- `vendor/bin/sail artisan test --compact --filter=EntraAdminRoles`

## Manual verification (developer)
- Ensure the `entraRoleAssignments` contract includes `allowed_expand => ['principal']`.
- Ensure the role assignment LIST request includes `$expand=principal` when explicitly requested.

## Usage examples
When listing a policy type where the contract allowlists `principal`:
- `listPolicies('entraRoleAssignments', [..., 'expand' => 'principal'])`
- `listPolicies('entraRoleAssignments', [..., 'expand' => ['principal']])`

Normalization behavior:
- `expand` string input is split on top-level commas only (commas inside balanced parentheses are not separators) and trimmed.
- Values not in the contract allowlist are dropped.
- Max 10 allowlisted expansions are sent; extras are dropped.

## Notes
- No expansions are sent by default. Callers must pass `expand` explicitly.
- Diagnostics are emitted when requested expands are removed or truncated.