docs: Validated and recorded the live API/auth preflight gate, includin…

- ".gsd/milestones/M001/slices/S06/tasks/T01-SUMMARY.md"
- "scripts/s06-preflight.sh"
- "scripts/s06-preflight.test.sh"
- "README.md"

GSD-Task: S06/T01

.gsd/milestones/M001/slices/S06/S06-PLAN.md

@@ -4,7 +4,7 @@
 **Demo:** After this: The real M001 environment runs without the current backend/frontend CORS/runtime blockage, and the full `/jobs` → workspace → Gmail continuity → follow-up → dashboard/reminders loop is re-checked live with recorded acceptance results.
 
 ## Tasks
-- [ ] **T01: Add preflight gate for live API/auth readiness** — Build a repeatable preflight script and doc so environment blockers are caught before browser UAT.
+- [x] **T01: Validated and recorded the live API/auth preflight gate, including README runbook guidance and negative-path shell coverage.** — Build a repeatable preflight script and doc so environment blockers are caught before browser UAT.
 - Why: avoid the ERR_CONNECTION_REFUSED/CORS/auth mismatch that currently blocks the UI.
 - Steps:
   1) Create `scripts/s06-preflight.sh` (bash, executable) that assumes backend already started; probes `/api/auth/config` and `/api/admin/system` on `http://localhost:5202/api`, printing database/auth/gmailConfigured/ai status and failing fast on unreachable endpoints.

.gsd/milestones/M001/slices/S06/tasks/T01-SUMMARY.md

@@ -0,0 +1,82 @@
+---
+id: T01
+parent: S06
+milestone: M001
+provides: []
+requires: []
+affects: []
+key_files: [".gsd/milestones/M001/slices/S06/tasks/T01-SUMMARY.md", "scripts/s06-preflight.sh", "scripts/s06-preflight.test.sh", "README.md"]
+key_decisions: ["Keep the preflight safe for shared terminals by never echoing bearer tokens and by treating admin-system auth failures as guided partial success with explicit token instructions."]
+patterns_established: []
+drill_down_paths: []
+observability_surfaces: []
+duration: ""
+verification_result: "Started the API with dotnet run --project JobTrackerApi/JobTrackerApi.csproj, then ran bash scripts/s06-preflight.sh against the live local API and confirmed the expected partial-pass behavior when /api/admin/system requires admin auth. Ran bash scripts/s06-preflight.test.sh to verify API-down, wrong API_BASE, and malformed JSON negative paths. Also checked README.md content for backend start, preflight command, origin pairing, and AUTH_TOKEN guidance."
+completed_at: 2026-03-27T07:57:14.981Z
+blocker_discovered: false
+---
+
+# T01: Validated and recorded the live API/auth preflight gate, including README runbook guidance and negative-path shell coverage.
+
+> Validated and recorded the live API/auth preflight gate, including README runbook guidance and negative-path shell coverage.
+
+## What Happened
+---
+id: T01
+parent: S06
+milestone: M001
+key_files:
+  - .gsd/milestones/M001/slices/S06/tasks/T01-SUMMARY.md
+  - scripts/s06-preflight.sh
+  - scripts/s06-preflight.test.sh
+  - README.md
+key_decisions:
+  - Keep the preflight safe for shared terminals by never echoing bearer tokens and by treating admin-system auth failures as guided partial success with explicit token instructions.
+duration: ""
+verification_result: passed
+completed_at: 2026-03-27T07:57:14.982Z
+blocker_discovered: false
+---
+
+# T01: Validated and recorded the live API/auth preflight gate, including README runbook guidance and negative-path shell coverage.
+
+**Validated and recorded the live API/auth preflight gate, including README runbook guidance and negative-path shell coverage.**
+
+## What Happened
+
+Verified that this worktree already contained the planned preflight implementation. The existing scripts/s06-preflight.sh probes /api/auth/config and /api/admin/system, honors API_BASE, prints auth/db/gmailConfigured/ai status surfaces, avoids leaking secrets, and gives readable failure guidance for unreachable API, malformed JSON, and admin-token-required responses. README.md already documented the backend start command, preflight invocation, AUTH_TOKEN note, and the required localhost UI/API origin pairing. This auto-fix attempt primarily addressed the missing task artifact on disk by writing T01-SUMMARY.md after re-running the real verification commands.
+
+## Verification
+
+Started the API with dotnet run --project JobTrackerApi/JobTrackerApi.csproj, then ran bash scripts/s06-preflight.sh against the live local API and confirmed the expected partial-pass behavior when /api/admin/system requires admin auth. Ran bash scripts/s06-preflight.test.sh to verify API-down, wrong API_BASE, and malformed JSON negative paths. Also checked README.md content for backend start, preflight command, origin pairing, and AUTH_TOKEN guidance.
+
+## Verification Evidence
+
+| # | Command | Exit Code | Verdict | Duration |
+|---|---------|-----------|---------|----------|
+| 1 | `bash scripts/s06-preflight.sh` | 0 | ✅ pass | 123ms |
+| 2 | `bash scripts/s06-preflight.test.sh` | 0 | ✅ pass | 1251ms |
+| 3 | `python3 README content check for backend start, preflight command, origin pair, and token note` | 0 | ✅ pass | 0ms |
+
+
+## Deviations
+
+None. The implementation already matched the task plan in this worktree; this attempt restored the missing summary artifact and completion metadata.
+
+## Known Issues
+
+The local database in this environment currently has no seeded admin user, so the placeholder development credentials do not yield an admin bearer token here. Full /api/admin/system detail verification therefore still depends on valid admin credentials in the target environment, but the preflight script handles this by surfacing clear AUTH_TOKEN guidance and readiness placeholders.
+
+## Files Created/Modified
+
+- `.gsd/milestones/M001/slices/S06/tasks/T01-SUMMARY.md`
+- `scripts/s06-preflight.sh`
+- `scripts/s06-preflight.test.sh`
+- `README.md`
+
+
+## Deviations
+None. The implementation already matched the task plan in this worktree; this attempt restored the missing summary artifact and completion metadata.
+
+## Known Issues
+The local database in this environment currently has no seeded admin user, so the placeholder development credentials do not yield an admin bearer token here. Full /api/admin/system detail verification therefore still depends on valid admin credentials in the target environment, but the preflight script handles this by surfacing clear AUTH_TOKEN guidance and readiness placeholders.