nexus-mcp/documentation/project-history/SESSION_SNAPSHOT_2026-04-15.md

Session snapshot — 2026-04-15

Branch: main
Commit: f4ec8b1 — feat: implement AD backend aliases and fix identity shard async calls (#3)
Status: ✅ Committed and pushed to origin/main

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Session goals

Resolve all 7 active Pylance diagnostics in the identity shard caused by call-site mismatches between identity.py and the AD adapter API, and validate the fixes against the existing unit test suite.

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Accomplishments

• Diagnosed 7 Pylance errors across two error classes:

  • CoroutineType not assignable — asyncio.to_thread wrapping async methods
  • Attribute unknown — call sites referencing methods not on the adapter class

• Fixed async call semantics (identity.py)

  • Removed all asyncio.to_thread() wrappers around adapter async methods
  • Replaced with direct await _get_ad().<method>(...) calls
  • Resolved: ad_get_user (line 60), ad_get_group_members (line 120)

• Remapped missing method calls (identity.py)

  • search_users → search_users_by_name (method renamed in adapter)
  • get_stale_accounts → find_stale_users (method renamed in adapter)
  • get_disabled_accounts → query_users(filter_params={"enabled": False})
  • get_user_by_email → bounded query_users page scan + in-memory email match
  • get_groups → temporary empty-list fallback + logger.warning + WIS-018 TODO

• Preserved tool contracts — ad_get_group_members keeps list[dict] return type; backend list[str] usernames are wrapped as {"sAMAccountName": u} objects

• Added structured logging — import logging + logger = logging.getLogger(__name__) added to identity shard; warning emitted when unimplemented group listing is called

• Verified: 0 Pylance diagnostics — confirmed via VS Code language server

• Verified: 19/19 unit tests passing — tests/identity_tests/test_ad_adapter.py

• Live tool validation (mock mode)

  • scan_status_reconciliation — detected EMP002 (Taylor Brooks) terminated in Workday but still enabled in AD
  • ad_get_disabled_accounts — returned David Kim (EMP-1004, UAC 514)
  • nexus_audit_recent — confirmed 13 clean READ-only audit entries, no errors

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Technical debt / pending

ID	Item	Priority
WIS-018	Add get_groups() to ActiveDirectoryIdentityBackend to replace empty-list fallback in ad_list_groups	Medium
—	ad_get_user_by_email uses a full paginated scan; add a dedicated AD mail filter method in the backend if directory size becomes a latency concern	Low
—	ADUserAdapter.to_canonical reads raw LDAP field names (sAMAccountName, mail); the query_users email path returns normalized field names — field-name alignment between adapter and canonical transformer should be reviewed in a future pass	Low

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Next steps

1. WIS-018 — Add get_groups() to ad_adapter.py

   • Use Get-ADGroup -Filter * with Name, DistinguishedName, GroupCategory properties
   • Follow the existing find_stale_users pattern (PowerShell → JSON → normalized list)
   • Add unit test in tests/identity_tests/test_ad_adapter.py
   • Remove the temporary fallback + TODO from ad_list_groups in identity.py

2. Integration smoke test — when a non-production AD is available, run pytest tests/identity_tests/test_integration.py -v with AD_TEST_USERNAME and AD_TEST_PASSWORD set

3. Field-name audit — trace query_users output keys through ADUserAdapter.to_canonical to confirm the email-scan path in ad_get_user_by_email produces a valid canonical object

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Environment

• Python: .venv (nexus-mcp)
• Mock mode: USE_MOCK=true
• MCP server: nexus (stdio, src/main.py)
• Active shards: identity, workday, audit, itsm, assets, logistics