docs(agents): update session close — sync endpoint + trailing slash fix

Replace manual make fix-consistency instruction with direct curl call to
POST /repos/repo-registry/sync. Fix trailing slash on tasks/{id}/ example.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

AGENTS.md

@@ -68,7 +68,7 @@ curl -s -X PATCH "http://127.0.0.1:8000/messages/<message_id>/read" \
 ### Update task status (after workstreams are synced)
 
 ```bash
-curl -s -X PATCH "http://127.0.0.1:8000/tasks/<task_id>/" \
+curl -s -X PATCH "http://127.0.0.1:8000/tasks/<task_id>" \
   -H "Content-Type: application/json" \
   -d '{"status": "in_progress"}'
 ```
@@ -89,8 +89,15 @@ curl -s -X PATCH "http://127.0.0.1:8000/tasks/<task_id>/" \
 **Close:**
 1. Update task statuses in workplan files to match progress
 2. Call `POST /progress/` with a summary of what was done
-3. If workplan files changed, note that `fix-consistency` should be run from
+3. If workplan files changed, sync them to the hub DB:
-   the custodian machine: `cd ~/the-custodian/state-hub && make fix-consistency REPO=repo-registry`
+
+```bash
+curl -s -X POST "http://127.0.0.1:8000/repos/repo-registry/sync" | python3 -m json.tool
+```
+
+This runs the ADR-001 consistency check with `--fix` and returns a JSON report.
+A `"result": "warn"` with only C-17 is normal (unpushed commits); no action needed.
+A `"result": "fail"` means file/DB drift that could not be auto-fixed — read the issues list.
 
 ---