# QA Plan: health-checks TUI pane — fd67a6c

Observability spec §4 / §3-tier-2. Drafted from the diff (commit `fd67a6c`) per the BACKLOG QA rule.

**Status:** DRAFT
**Run date / operator:**
**BACKLOG item:** §A "§4/§3 live health TUI pane".

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## Preconditions

- [ ] **server build/branch:** master @ `fd67a6c` (or later); TUI rebuilt from `apps/tui-go`.
- [ ] **config:** `[health].enabled = true` so probes actually run and emit (else the pane should show the disabled fallback — that's check 5).
- [ ] **at least one probe able to flip:** easiest is the EVENT_STORE or DISK probe (lower `event_store_latency_warn_ms` / `disk_warn_bytes` to force a DEGRADED), or stop llama-server for the LLAMA_SERVER probe.
- [ ] TUI connected to the server over WS.

## Acceptance gate (one sentence)

> The pane is correct **iff** pressing `H` fetches and renders the current per-subject health
> (LLAMA_SERVER / EVENT_STORE / DISK) with HEALTHY/DEGRADED matching `correx health`, degraded
> rows visually loud, and an empty/disabled report shows a visible fallback (never blank).

## Checks

| # | Action | Expected observable evidence | Result |
|---|--------|------------------------------|--------|
| 1 | In a session (or idle), press `H` | Health pane opens; brief loading state, then per-subject rows render. Footer/palette lists `H health` / "health checks" | |
| 2 | Compare pane to CLI | Pane's subjects + statuses match `correx health` / `GET /health/checks` exactly (same overall + per-subject status/metric/value/detail) | |
| 3 | Force a DEGRADED (e.g. stop llama-server, or lower a threshold), reopen `H` | The affected subject shows DEGRADED in the loud/red color; detail string matches the probe's; healthy subjects stay in the OK color | |
| 4 | Restore, reopen `H` | Subject back to HEALTHY; pane reflects the restored state (fresh fetch each open — no stale cache) | |
| 5 | Set `[health].enabled=false` (or fresh log w/ no health events), reopen `H` | Visible fallback line ("no health probes recorded — health monitoring may be disabled"), never a blank pane | |
| 6 | Press `H` again / `esc` | Pane closes cleanly; no stuck loading state; returns to prior view | |
| 7 | Resize terminal with the pane open | No corruption; rows reflow; footer hint present in both wide and narrow layouts | |
| 8 | (wire contract, live) Confirm values aren't silently zeroed | observedValue / metric / detail / since all populated (not 0/empty) for a real subject — proves the Go↔Kotlin field names match at runtime, not just in golden tests | |

Evidence sources: the TUI render, `correx health` / `GET /health/checks` for cross-check, server WS logs
(`GetHealthChecks` → `health.checks`).

## Out of scope (NOT covered this pass)

- The probes themselves (separate plans: `QA-llama-health-probe.md`, `QA-event-store-health-probe.md`;
  disk probe shipped earlier in f8fd260).
- Live-push of health (pane is pull-on-open by design, mirroring the stats pane).

## Disposition

- **PASS** → MOVE the §A "live health TUI pane" entry into `RETRO.md` (cite `fd67a6c`, run date, evidence).
  With all three probes + the pane QA'd, the §4 health-checks feature can be retired from BACKLOG as a unit.
- **FAIL** → file each failure as a numbered finding back into `BACKLOG.md` (action + repro + wrong/missing
  signal), fix, re-run only the failed checks. Set Status: FAILED until green.
