---
title: T02 summary
status: done
files:
  - Models/Correspondence.cs
  - JobTrackerApi/Controllers/GmailController.cs
  - JobTrackerApi/Controllers/CorrespondenceController.cs
  - JobTrackerApi/Program.cs
  - JobTrackerApi.Tests/GmailControllerTests.cs
observability_surfaces:
  - POST /api/gmail/import
  - POST /api/gmail/import-thread
  - persisted Correspondence.ExternalThreadId / ExternalFrom / ExternalTo fields
  - JobTrackerApi.Tests/GmailControllerTests.cs repeat-import coverage
verification:
  - $HOME/.dotnet/dotnet build JobTrackerApi/JobTrackerApi.csproj
  - docker run --rm -v "$PWD":/src -w /src mcr.microsoft.com/dotnet/sdk:9.0 bash -lc '...dotnet test /tmp/gmailtests/GmailTests.csproj...'
---

Extended correspondence persistence and Gmail import continuity for S01.

## What changed

- `Models/Correspondence.cs`
  - added `ExternalThreadId`
  - added `ExternalFrom`
  - added `ExternalTo`
- `JobTrackerApi/Controllers/GmailController.cs`
  - single-message import now returns `GmailImportMessageResultDto` with `Imported`, `Skipped`, `MessageId`, `ThreadId`, and the imported/existing `Correspondence`
  - repeat single-message imports now report `Imported=0` / `Skipped=1` instead of returning a bare correspondence record
  - imported Gmail messages now persist thread id plus raw sender/recipient metadata
- `JobTrackerApi/Controllers/CorrespondenceController.cs`
  - create request now accepts optional external message/thread/from/to metadata so the correspondence surface stays consistent with enriched imports
- `JobTrackerApi/Program.cs`
  - added SQLite compatibility guards for `Correspondences.ExternalThreadId`, `Correspondences.ExternalFrom`, and `Correspondences.ExternalTo`
  - added MySQL compatibility guards for the same columns
- `JobTrackerApi.Tests/GmailControllerTests.cs`
  - added repeat single-message import coverage
  - added repeat thread import coverage
  - retained ranking and owned-job scope coverage from T01

## Verification

- Native API build passed with `$HOME/.dotnet/dotnet build JobTrackerApi/JobTrackerApi.csproj`
- Isolated Gmail controller tests passed in Docker (`5 passed`)

## Verification Evidence

| # | Command | Exit Code | Verdict | Duration |
|---|---------|-----------|---------|----------|
| 1 | `$HOME/.dotnet/dotnet build JobTrackerApi/JobTrackerApi.csproj` | 0 | ✅ pass | ~1.2s |
| 2 | `docker run --rm -v "$PWD":/src -w /src mcr.microsoft.com/dotnet/sdk:9.0 bash -lc '...dotnet test /tmp/gmailtests/GmailTests.csproj...'` | 0 | ✅ pass | not recorded |

## Diagnostics

- Inspect persisted `Correspondence` rows for `ExternalMessageId`, `ExternalThreadId`, `ExternalFrom`, and `ExternalTo` to confirm Gmail imports keep thread identity plus sender/recipient labels.
- Hit `POST /api/gmail/import` twice with the same Gmail message id to confirm the duplicate-safe `Imported`/`Skipped` contract.
- Hit `POST /api/gmail/import-thread` twice with the same thread payload to confirm repeat imports skip already-linked message ids instead of duplicating correspondence.
- Read `JobTrackerApi.Tests/GmailControllerTests.cs` for the durable expected behavior around repeat single-message and repeat thread imports.

## Important caveat

The repository’s main `JobTrackerApi.Tests` project still had unrelated pre-existing compile failures outside Gmail tests when this task finished, so the exact planned command `dotnet test JobTrackerApi.Tests/JobTrackerApi.Tests.csproj --filter GmailControllerTests` remained blocked at that point by broader test drift. Gmail coverage itself passed when isolated.