fix(t-paliad-155): cold-start timeout headroom + ban DB fallbacks in skill

Shim's run-turn hard timeout: 60s → 120s (PALIADIN_TIMEOUT_S default).
First turn after a fresh tmux session stacks claude boot + skill load
+ MCP discovery + first reasoning, which can blow past 60s before the
response file lands.

Aligned the surrounding timeouts so 120s is actually reachable:
- callShim ctx (paliadin_remote.go): 70s → 130s (shim 120 + 10 SSH).
- runPaliadinTurnAsync handler ctx: 120s → 150s (shim 120 + 10 SSH +
  20 paliad-side overhead).

SKILL.md hard rule #6 added: never fall back to psql / curl PostgREST /
nix-shell — mcp__supabase__execute_sql is the only DB tool. If it's
unavailable, write a short 'DB nicht erreichbar — bitte paliad neu
deployen oder PALIADIN_REMOTE_CWD prüfen' response immediately with
classifier_tag=meta. Saves the 60s-fallback-dance failure mode m hit
on the cwd-misconfig turn.

internal/handlers/paliadin.go

@@ -166,7 +166,9 @@ func handlePaliadinTurn(w http.ResponseWriter, r *http.Request) {
 }
 
 // runPaliadinTurnAsync executes the turn and writes events into ch.
-// Uses a 2-minute hard timeout independently of the originating request.
+// Uses a 150 s hard timeout independently of the originating request,
+// which leaves headroom over the shim's 120 s run-turn cap + SSH
+// overhead (t-paliad-155: cold-start safety for skill + MCP discovery).
 func runPaliadinTurnAsync(turnID uuid.UUID, req services.TurnRequest, ch chan<- turnEvent) {
 	defer func() {
 		// Drain + close. The SSE handler reads until the channel closes.
@@ -182,7 +184,7 @@ func runPaliadinTurnAsync(turnID uuid.UUID, req services.TurnRequest, ch chan<-
 		},
 	})
 
-	ctx, cancel := newDetachedContext(120 * time.Second)
+	ctx, cancel := newDetachedContext(150 * time.Second)
 	defer cancel()
 
 	result, err := paliadinSvc.RunTurn(ctx, req)

internal/services/paliadin_remote.go

@@ -261,8 +261,9 @@ func (s *RemotePaliadinService) callShim(ctx context.Context, args ...string) ([
 	}
 	sshArgs = append(sshArgs, args...)
 
-	// Shim's run-turn timeout is 60 s; +10 s gives SSH some overhead.
-	c, cancel := context.WithTimeout(ctx, 70*time.Second)
+	// Shim's run-turn timeout is 120 s (cold start = claude boot + skill
+	// load + MCP discovery + first reasoning); +10 s gives SSH overhead.
+	c, cancel := context.WithTimeout(ctx, 130*time.Second)
 	defer cancel()
 
 	cmd := exec.CommandContext(c, "ssh", sshArgs...)

scripts/paliadin-shim

@@ -30,7 +30,7 @@ set -euo pipefail
 umask 077
 
 readonly RESPONSE_DIR="${PALIADIN_RESPONSE_DIR:-/tmp/paliadin}"
-readonly TIMEOUT_S="${PALIADIN_TIMEOUT_S:-60}"
+readonly TIMEOUT_S="${PALIADIN_TIMEOUT_S:-120}"
 # Working directory for the claude pane. Must be the paliad repo root so
 # claude picks up .mcp.json (project-scoped Supabase MCP) — without it,
 # the SKILL.md SQL recipes fail with no DB tool. Override via env var if

scripts/skills/paliadin/SKILL.md

@@ -73,6 +73,7 @@ Nur IDs/Slugs benutzen, die du tatsächlich aus einem Tool-Call hast. **Niemals
 3. **Read-only.** Schreibe nichts in die DB. Wenn m etwas ändern will, sag wo in Paliad.
 4. **Visibility-Gate respektieren.** Auch wenn m global_admin ist: jede projekt-bezogene Abfrage MUSS `paliad.can_see_project(project_id)` enthalten.
 5. **Nicht über andere User spekulieren** — frag nach Projekt-ID/Slug, selbst wenn m sie namentlich erwähnt.
+6. **Niemals auf `psql`, `curl PostgREST`, `nix-shell` oder andere DB-Fallbacks ausweichen.** Die einzig zulässige DB-Quelle ist `mcp__supabase__execute_sql` (project-scoped MCP). Wenn dieser Tool-Aufruf nicht verfügbar ist, schreibe sofort: *"DB nicht erreichbar — bitte paliad neu deployen oder PALIADIN_REMOTE_CWD prüfen."* mit `classifier_tag: meta`. Niemals 60+ Sekunden im Fallback-Tanz verbringen — der Backend-Timeout schlägt sonst zu, bevor du eine Antwort schreibst.
 
 ## Beispiel — vollständige Antwortdatei