Recovery: Re-land (Close source-imported GitHub issues on ta

docs/settings-reference.md

@@ -371,6 +371,7 @@ Default notes:
 | `autoUpdatePrStatus` | `boolean` | `false` | Auto-refresh PR status badges. |
 | `githubCommentOnDone` | `boolean` | `false` | When enabled, tasks imported from GitHub issues post a completion comment to the source issue when the task moves to `done`. |
 | `githubCommentTemplate` | `string` | `undefined` | Optional issue comment template used by `githubCommentOnDone`. Supports `{taskId}` and `{taskTitle}` placeholders. If unset, Fusion uses a default completion message. |
+| `githubCloseSourceIssueOnDone` | `boolean` | `false` | When enabled, source-imported GitHub issues are automatically closed with `state_reason: completed` when the Fusion task moves to `done`. A startup reconciliation sweep also closes missed open source issues on boot. |
 | `githubTrackingEnabledByDefault` | `boolean` | `false` | Project-level default for enabling issue tracking on new tasks. When this is false, the Quick Entry GitHub toggle is disabled until tracking is enabled in Settings. |
 | `githubTrackingDefaultRepo` | `string` | `undefined` | Project default issue-tracking repo (`owner/repo`) used before global fallback for tracked task creation (precedence: task override → project default → global default). In Settings UI this is a detected-remote dropdown with a Custom fallback for manual entry. This key is dual-scope: project saves go through `PUT /api/settings` (Settings → General → GitHub Tracking) while global saves go through `PUT /api/settings/global` (Settings → Global General). |
 | `githubTrackingDedupEnabled` | `boolean` | `true` | When enabled, tracking issue creation searches open and closed repo issues for likely duplicates before opening a new issue (gh CLI search first, with REST search fallback). Set `false` to skip dedup and always create a new issue when tracking is enabled. Dashboard location: **Settings → Project → General → GitHub Tracking**. |