# Implementation Report: Spec 427 - Exchange / Teams Verified Source Contract Enablement

**Branch**: `427-exchange-teams-verified-source-contract-enablement`  
**HEAD**: `f7d06621 feat: implement Exchange Teams evidence identity readiness (#493)`  
**Implementation date**: 2026-07-03  
**Result**: PASS - exact source-contract blocker enablement, no evidence/readiness promotion

## Preflight

- Initial dirty state before implementation: untracked active spec package `specs/427-exchange-teams-verified-source-contract-enablement/`.
- Dirty state after implementation: expected runtime/test/spec report changes only.
- Completed Specs 414, 415, 417, 419, 420, and 426 were read-only context. Their spec/plan/tasks/implementation reports were not modified.
- Active gates used: Spec Kit implementation loop, Spec Readiness Gate, TCM cutover guard, provider freshness semantics, evidence anchor contract, workspace scope safety, and Pest testing.
- Hard-gate result: no stop condition met. No UI, route, navigation, Filament provider, OperationRun start UX, real provider capture, evidence promotion, compare/render promotion, certification, restore, customer output, `tenant_id`, legacy adapter, fallback reader, or dual write was required.

## Implementation Summary

- Added bounded source-contract state constants to `CoverageSourceContractDecision`.
- Added a separate `sourceContractState` field so source-contract truth is explicit without changing the capture outcome enum family.
- Left already enabled non-target source contracts unchanged to avoid broad relabeling outside Spec 427.
- Mapped exactly `transportRule`, `acceptedDomain`, `appPermissionPolicy`, and `meetingPolicy` to `contract_blocked_repo_adapter_missing`.
- Kept all four target types non-capturable: no contract key, no source endpoint, no provider call, no resource row, no evidence row.
- Kept `dlpCompliancePolicy` and other non-target missing contracts on the existing generic missing-source path.

## Source Contract Matrix

| Type | Workload | Source class | Final state | Capture outcome | Provider call | Evidence promotion |
| --- | --- | --- | --- | --- | --- | --- |
| `transportRule` | Exchange | `tcm` | `contract_blocked_repo_adapter_missing` | `capture_blocked_missing_contract` | no | no |
| `acceptedDomain` | Exchange | `tcm` | `contract_blocked_repo_adapter_missing` | `capture_blocked_missing_contract` | no | no |
| `appPermissionPolicy` | Teams | `tcm` | `contract_blocked_repo_adapter_missing` | `capture_blocked_missing_contract` | no | no |
| `meetingPolicy` | Teams | `tcm` | `contract_blocked_repo_adapter_missing` | `capture_blocked_missing_contract` | no | no |

No endpoint guessing, direct HTTP, runtime documentation fetch, provider bypass, Graph contract entry, or provider OAuth/scope widening was added.

## Safety Matrices

### Permission

- Permission model for all four types is `not_productized`.
- Required application permissions and delegated permissions remain empty in Spec 427 metadata.
- Failure mode is `block_without_provider_call`.
- Permission context remains redacted and is not default output.

### Response Shape

- Response shape remains `provider_collection_candidate`.
- Empty collection, permission denied, unsupported, source unavailable, and malformed response are distinct future-adapter meanings.
- State remains blocked until a repo adapter can distinguish those cases.

### Identity

- Identity handoff is `stable_candidate`.
- Preferred/fallback identity fields are type-specific and do not include `displayName`, `DisplayName`, `name`, `Name`, or `Identity`.
- Display-only payloads still resolve to `missing_external_id`.

### Redaction

- Raw payload and permission context are not default-visible.
- Metadata forbids raw provider payloads, provider responses, authorization headers, tokens, credentials, mail content, and Teams chat/message/file/recording/transcript content in default output.
- Existing Exchange/Teams helper redaction remains covered by tests.

## No-Promotion Matrix

| Guard | Result |
| --- | --- |
| No resource/evidence rows | passed |
| No content-backed/comparable/renderable/certified promotion | passed |
| No customer or restore claim | passed |
| No `tenant_id` ownership truth | passed |
| No Exchange/Teams mini-platform | passed |
| Spec 426 fail-safe behavior | passed with exact blocker reason |
| Spec 417 identity registry regression | passed |
| Spec 420 generic evidence regression | passed |

## Product Surface / Filament / Deployment

- Product Surface result: `N/A - no rendered UI surface changed`.
- Browser proof: `N/A - no rendered UI surface changed`.
- Human Product Sanity: `N/A - no product surface changed`.
- Product Surface exceptions: none.
- Visible complexity outcome: neutral.
- Livewire v4 compliance: unchanged; Filament v5 remains on Livewire v4.1.4.
- Provider registration location: unchanged; Laravel providers remain in `apps/platform/bootstrap/providers.php`.
- Global search posture: unchanged; no Filament Resource/global search behavior changed.
- Destructive/high-impact actions: none added.
- Asset strategy: no assets; no new `filament:assets` deployment requirement.
- Deployment impact: no migrations, env vars, queue/cron changes, storage changes, assets, or runtime provider permission changes.

## Validation

Passed:

- `cd apps/platform && ./vendor/bin/sail artisan test --compact tests/Unit/Support/TenantConfiguration/Spec427ExchangeTeamsSourceContractStateTest.php tests/Unit/Support/TenantConfiguration/Spec427ExchangeTransportRuleContractTest.php tests/Unit/Support/TenantConfiguration/Spec427ExchangeAcceptedDomainContractTest.php tests/Unit/Support/TenantConfiguration/Spec427TeamsAppPermissionPolicyContractTest.php tests/Unit/Support/TenantConfiguration/Spec427TeamsMeetingPolicyContractTest.php tests/Unit/Support/TenantConfiguration/Spec427SourceContractPermissionMetadataTest.php tests/Unit/Support/TenantConfiguration/Spec427SourceContractResponseShapeTest.php tests/Unit/Support/TenantConfiguration/Spec427SourceContractIdentityHandoffTest.php tests/Unit/Support/TenantConfiguration/Spec427SourceContractRedactionTest.php`
  - Initial run: 32 passed, 282 assertions.
  - Post-analysis rerun after non-target relabeling fix: 33 passed, 287 assertions.
- `cd apps/platform && ./vendor/bin/sail artisan test --compact tests/Feature/TenantConfiguration/Spec427ExchangeTeamsNoEvidencePromotionTest.php tests/Feature/TenantConfiguration/Spec427ExchangeTeamsNoCompareRenderCertificationTest.php tests/Feature/TenantConfiguration/Spec427ExchangeTeamsNoCustomerRestoreClaimTest.php tests/Feature/TenantConfiguration/Spec427ExchangeTeamsNoTenantIdTest.php tests/Feature/TenantConfiguration/Spec427ExchangeTeamsNoMiniPlatformTest.php`
  - Initial pre-fix run hit Signal 9 because the no-mini-platform guard loaded all app PHP files into memory.
  - After narrowing that guard to path-level checks: 5 passed, 104 assertions.
- `cd apps/platform && ./vendor/bin/sail artisan test --compact tests/Unit/Support/TenantConfiguration/Spec426ExchangeTeamsSourceContractResolverTest.php tests/Feature/TenantConfiguration/Spec426ExchangeTeamsCoreEvidenceReadinessTest.php`
  - 8 passed, 91 assertions.
- `cd apps/platform && ./vendor/bin/sail artisan test --compact tests/Unit/Support/TenantConfiguration/Spec417CoverageIdentityStrategyRegistryTest.php tests/Unit/Support/TenantConfiguration/Spec420M365CaptureSourceContractResolverTest.php tests/Feature/TenantConfiguration/Spec420M365GenericEvidenceCaptureTest.php`
  - 8 passed, 192 assertions.
- `cd apps/platform && ./vendor/bin/sail artisan test --compact tests/Unit/Support/TenantConfiguration/Spec420M365CaptureSourceContractResolverTest.php tests/Feature/TenantConfiguration/Spec420M365GenericEvidenceCaptureTest.php`
  - Post-analysis rerun for non-target explicit contract behavior: 6 passed, 90 assertions.
- `cd apps/platform && ./vendor/bin/sail artisan test --compact tests/Unit/Support/TenantConfiguration/Spec420M365CaptureEligibilityTest.php`
  - 6 passed, 33 assertions.
- `cd apps/platform && ./vendor/bin/sail bin pint --dirty --format agent`
  - passed.
- `git diff --check`.
  - passed.

## Deferred Work

- Spec 428: Exchange/Teams content-backed evidence promotion after a real source adapter/contract exists.
- Spec 429: Exchange/Teams comparable/renderable promotion after source-backed evidence exists.
- Later certified compare pack, customer reporting claims, restore/apply, provider permission productization, and optional resource expansion.

## Post-Implementation Analysis

- Analysis/fix iterations: 1.
- Finding fixed: assigning `contract_verified_pending_capture` to already-enabled non-target contracts could have created misleading source-contract metadata outside Spec 427. Remediation: leave existing enabled contracts unchanged and add a regression proving `conditionalAccessPolicy` is not relabeled.
- Final manual review fix: generic blocked resolver outcomes no longer receive `sourceContractState`; only the four Spec 427 reviewed target types receive the explicit source-contract blocker state. Added regression proof for a non-target unsupported type.
- Merge-state fix: active Spec 427 spec artifacts and new Spec 427 tests are intended branch contents and must be tracked with the runtime/test changes.
- Remaining confirmed in-scope findings: none.
- Residual risks: none inside active scope. Future verified contracts remain separate-spec work.

## Merge Readiness Notes

- No confirmed in-scope implementation findings remain at this report stage.
- Browser Smoke Test Gate: passed as not applicable because no rendered UI changed.
- Merge Readiness Gate: passed.