refact(frank-zealot): serve gates run on the shared gate library

The three -e gates (runtime, GGUF, mmproj) are require_file calls: the refusal
now names the artifact class, the exact path and the script that produces it.
The seam asserts that observable triple instead of the old sentence order.

scripts/serve-frank-zealot.sh

@@ -28,6 +28,13 @@
 set -euo pipefail
 
 SCRIPT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
+
+# The artifact gates are the shared library: the serve script and the
+# deployer must refuse the same missing payload with the same words
+# (scripts/lib/llm-gates.sh; the fleet law from the 2026-10-01 crash-loop).
+export GATE_PREFIX=frank-zealot
+# shellcheck disable=SC1091
+source "$SCRIPT_DIR/lib/llm-gates.sh"
 ENV_FILE="${FRANK_ZEALOT_ENV_FILE:-$SCRIPT_DIR/frank-zealot.env}"
 if [[ -f "$ENV_FILE" ]]; then
     set -a
@@ -81,13 +88,18 @@ fi
 
 # Fail loudly rather than half-loading: a missing file is a download that
 # has not finished, and Restart=always would turn it into a crash loop that
-# reads like a runtime fault.
-for path in "$LLAMA_BIN" "$MODEL_FILE"; do
-    [[ -e "$path" ]] || { echo "frank-zealot: missing $path" >&2; exit 1; }
-done
+# reads like a runtime fault. The refusal text is the shared gate library's,
+# so the deployer's twin refuses identically (the 2026-10-01 crash-loop law).
+require_file "$LLAMA_BIN" runtime \
+    "build it: scripts/build-llama-master-cuda.sh" || exit 1
+require_file "$MODEL_FILE" gguf \
+    "fetch it: bash scripts/download-frank-zealot.sh" || exit 1
+if [[ -n "$MMPROJ_FILE" ]]; then
+    require_file "$MMPROJ_FILE" mmproj \
+        "fetch it: bash scripts/download-frank-zealot.sh" || exit 1
+fi
 EXTRA_ARGS=()
 if [[ -n "$MMPROJ_FILE" ]]; then
-    [[ -e "$MMPROJ_FILE" ]] || { echo "frank-zealot: missing $MMPROJ_FILE" >&2; exit 1; }
     EXTRA_ARGS+=(--mmproj "$MMPROJ_FILE")
 fi
 

tests/frank_zealot_unit.bats

@@ -253,15 +253,20 @@ run_stage() {
 }
 
 @test "the serve script refuses a missing runtime, GGUF or projector" {
+    # The refusal is the shared gate library's: it names the artifact class,
+    # the exact path, and the script that produces it.
     rm -f "$MODEL_DIR/$MM_STUB"
     serve_argv
     [ "$status" -ne 0 ]
-    [[ "$output" == *"frank-zealot: missing"* ]]
+    [[ "$output" == *"frank-zealot:"* ]]
+    [[ "$output" == *"mmproj"*"missing"*"$MM_STUB"* ]]
+    [[ "$output" == *"download-frank-zealot.sh"* ]]
 
     rm -f "$RUNTIME_DIR/bin/llama-server"
     serve_argv
     [ "$status" -ne 0 ]
-    [[ "$output" == *"frank-zealot: missing"* ]]
+    [[ "$output" == *"runtime"*"missing"*"llama-server"* ]]
+    [[ "$output" == *"build-llama-master-cuda.sh"* ]]
 }
 
 @test "the deploy handler gates on binary, GGUF and projector, then MainPID-hardens health" {