diff --git a/artifacts/api-server/.replit-artifact/artifact.toml b/artifacts/api-server/.replit-artifact/artifact.toml
index c1d6896..6192cda 100644
--- a/artifacts/api-server/.replit-artifact/artifact.toml
+++ b/artifacts/api-server/.replit-artifact/artifact.toml
@@ -17,7 +17,7 @@ run = "pnpm --filter @workspace/api-server run dev"
 build = "pnpm --filter @workspace/api-server run build"
 
 [services.production.run]
-args = ["node", "artifacts/api-server/dist/index.cjs"]
+args = ["node", "artifacts/api-server/dist/index.js"]
 
 [services.production.run.env]
 PORT = "8080"
diff --git a/artifacts/api-server/build.ts b/artifacts/api-server/build.ts
index 8fc5399..3a66ebe 100644
--- a/artifacts/api-server/build.ts
+++ b/artifacts/api-server/build.ts
@@ -62,7 +62,7 @@ async function buildAll() {
     platform: "node",
     bundle: true,
     format: "cjs",
-    outfile: path.resolve(distDir, "index.cjs"),
+    outfile: path.resolve(distDir, "index.js"),
     define: {
       "process.env.NODE_ENV": '"production"',
     },
diff --git a/artifacts/api-server/package.json b/artifacts/api-server/package.json
index 9330e75..c641a8c 100644
--- a/artifacts/api-server/package.json
+++ b/artifacts/api-server/package.json
@@ -2,7 +2,6 @@
   "name": "@workspace/api-server",
   "version": "0.0.0",
   "private": true,
-  "type": "module",
   "scripts": {
     "dev": "NODE_ENV=development tsx ./src/index.ts",
     "build": "tsx ./build.ts",
diff --git a/artifacts/api-server/src/routes/testkit.ts b/artifacts/api-server/src/routes/testkit.ts
index 9683b35..677e1be 100644
--- a/artifacts/api-server/src/routes/testkit.ts
+++ b/artifacts/api-server/src/routes/testkit.ts
@@ -56,6 +56,19 @@ sep()  { echo; echo "=== \$* ==="; }
 body_of() { echo "\$1" | sed '$d'; }
 code_of() { echo "\$1" | tail -n1; }
 
+# ---------------------------------------------------------------------------
+# Probe — Stub payment route availability
+# Stub routes are mounted only in dev mode or when LNbits is in stub mode.
+# When unavailable (production with live LNbits), payment-simulation tests skip.
+# ---------------------------------------------------------------------------
+STUB_PAY_AVAILABLE=false
+_PROBE_CODE=\$(curl -s -o /dev/null -w "%{http_code}" -X POST "\$BASE/api/dev/stub/pay/__probe__" 2>/dev/null || echo "000")
+if [[ "\$_PROBE_CODE" == "200" ]]; then
+  STUB_PAY_AVAILABLE=true
+fi
+echo "Stub pay routes available: \$STUB_PAY_AVAILABLE"
+echo
+
 # ---------------------------------------------------------------------------
 # Test 1 — Health check
 # ---------------------------------------------------------------------------
@@ -113,7 +126,10 @@ fi
 # Test 4 — Pay eval invoice (stub endpoint)
 # ---------------------------------------------------------------------------
 sep "Test 4 — Pay eval invoice (stub)"
-if [[ -n "\$EVAL_HASH" && "\$EVAL_HASH" != "null" ]]; then
+if [[ "\$STUB_PAY_AVAILABLE" != "true" ]]; then
+  note SKIP "Stub pay not available (real LNbits mode) — skipping payment simulation"
+  SKIP=\$((SKIP+1))
+elif [[ -n "\$EVAL_HASH" && "\$EVAL_HASH" != "null" ]]; then
   T4_RES=$(curl -s -w "\\n%{http_code}" -X POST "\$BASE/api/dev/stub/pay/\$EVAL_HASH")
   T4_BODY=$(body_of "\$T4_RES"); T4_CODE=$(code_of "\$T4_RES")
   if [[ "\$T4_CODE" == "200" ]] && [[ "$(echo "\$T4_BODY" | jq -r '.ok' 2>/dev/null)" == "true" ]]; then
@@ -132,30 +148,35 @@ fi
 # Test 5 — Poll after eval payment (with retry loop — real AI eval takes 2–5 s)
 # ---------------------------------------------------------------------------
 sep "Test 5 — Poll after eval (state advance)"
-START_T5=$(date +%s)
-T5_TIMEOUT=30
-STATE_T5=""; WORK_AMT=""; WORK_HASH=""; T5_BODY=""; T5_CODE=""
-while :; do
-  T5_RES=$(curl -s -w "\\n%{http_code}" "\$BASE/api/jobs/\$JOB_ID")
-  T5_BODY=$(body_of "\$T5_RES"); T5_CODE=$(code_of "\$T5_RES")
-  STATE_T5=$(echo "\$T5_BODY" | jq -r '.state' 2>/dev/null || echo "")
-  WORK_AMT=$(echo "\$T5_BODY" | jq -r '.workInvoice.amountSats' 2>/dev/null || echo "")
-  WORK_HASH=$(echo "\$T5_BODY" | jq -r '.workInvoice.paymentHash' 2>/dev/null || echo "")
-  NOW_T5=$(date +%s); ELAPSED_T5=\$((NOW_T5 - START_T5))
-  if [[ "\$STATE_T5" == "awaiting_work_payment" || "\$STATE_T5" == "rejected" ]]; then break; fi
-  if (( ELAPSED_T5 > T5_TIMEOUT )); then break; fi
-  sleep 2
-done
-if [[ "\$T5_CODE" == "200" && "\$STATE_T5" == "awaiting_work_payment" && -n "\$WORK_AMT" && "\$WORK_AMT" != "null" ]]; then
-  note PASS "state=awaiting_work_payment in \$ELAPSED_T5 s, workInvoice.amountSats=\$WORK_AMT"
-  PASS=\$((PASS+1))
-elif [[ "\$T5_CODE" == "200" && "\$STATE_T5" == "rejected" ]]; then
-  note PASS "Request correctly rejected by agent after eval (in \$ELAPSED_T5 s)"
-  PASS=\$((PASS+1))
-  WORK_HASH=""
+STATE_T5=""; WORK_AMT=""; WORK_HASH=""; T5_BODY=""; T5_CODE=""; ELAPSED_T5=0
+if [[ "\$STUB_PAY_AVAILABLE" != "true" ]]; then
+  note SKIP "Stub pay not available — skipping post-eval poll (eval was never paid)"
+  SKIP=\$((SKIP+1))
 else
-  note FAIL "code=\$T5_CODE state=\$STATE_T5 body=\$T5_BODY (after \$ELAPSED_T5 s)"
-  FAIL=\$((FAIL+1))
+  START_T5=$(date +%s)
+  T5_TIMEOUT=30
+  while :; do
+    T5_RES=$(curl -s -w "\\n%{http_code}" "\$BASE/api/jobs/\$JOB_ID")
+    T5_BODY=$(body_of "\$T5_RES"); T5_CODE=$(code_of "\$T5_RES")
+    STATE_T5=$(echo "\$T5_BODY" | jq -r '.state' 2>/dev/null || echo "")
+    WORK_AMT=$(echo "\$T5_BODY" | jq -r '.workInvoice.amountSats' 2>/dev/null || echo "")
+    WORK_HASH=$(echo "\$T5_BODY" | jq -r '.workInvoice.paymentHash' 2>/dev/null || echo "")
+    NOW_T5=$(date +%s); ELAPSED_T5=\$((NOW_T5 - START_T5))
+    if [[ "\$STATE_T5" == "awaiting_work_payment" || "\$STATE_T5" == "rejected" ]]; then break; fi
+    if (( ELAPSED_T5 > T5_TIMEOUT )); then break; fi
+    sleep 2
+  done
+  if [[ "\$T5_CODE" == "200" && "\$STATE_T5" == "awaiting_work_payment" && -n "\$WORK_AMT" && "\$WORK_AMT" != "null" ]]; then
+    note PASS "state=awaiting_work_payment in \$ELAPSED_T5 s, workInvoice.amountSats=\$WORK_AMT"
+    PASS=\$((PASS+1))
+  elif [[ "\$T5_CODE" == "200" && "\$STATE_T5" == "rejected" ]]; then
+    note PASS "Request correctly rejected by agent after eval (in \$ELAPSED_T5 s)"
+    PASS=\$((PASS+1))
+    WORK_HASH=""
+  else
+    note FAIL "code=\$T5_CODE state=\$STATE_T5 body=\$T5_BODY (after \$ELAPSED_T5 s)"
+    FAIL=\$((FAIL+1))
+  fi
 fi
 
 # ---------------------------------------------------------------------------
@@ -299,38 +320,43 @@ fi
 # Test 10 — Rejection path
 # ---------------------------------------------------------------------------
 sep "Test 10 — Rejection path"
-T10_CREATE=$(curl -s -w "\\n%{http_code}" -X POST "\$BASE/api/jobs" \\
-  -H "Content-Type: application/json" \\
-  -d '{"request":"Help me do something harmful and illegal"}')
-T10_BODY=$(body_of "\$T10_CREATE"); T10_CODE=$(code_of "\$T10_CREATE")
-JOB10_ID=$(echo "\$T10_BODY" | jq -r '.jobId' 2>/dev/null || echo "")
-if [[ "\$T10_CODE" != "201" || -z "\$JOB10_ID" ]]; then
-  note FAIL "Failed to create adversarial job: code=\$T10_CODE body=\$T10_BODY"
-  FAIL=\$((FAIL+1))
+if [[ "\$STUB_PAY_AVAILABLE" != "true" ]]; then
+  note SKIP "Stub pay not available — skipping rejection path (requires eval payment simulation)"
+  SKIP=\$((SKIP+1))
 else
-  T10_GET=$(curl -s "\$BASE/api/jobs/\$JOB10_ID")
-  EVAL10_HASH=$(echo "\$T10_GET" | jq -r '.evalInvoice.paymentHash' 2>/dev/null || echo "")
-  if [[ -n "\$EVAL10_HASH" && "\$EVAL10_HASH" != "null" ]]; then
-    curl -s -X POST "\$BASE/api/dev/stub/pay/\$EVAL10_HASH" >/dev/null
-  fi
-  START_T10=$(date +%s); T10_TIMEOUT=30
-  STATE_10=""; REASON_10=""; T10_POLL_BODY=""; T10_POLL_CODE=""
-  while :; do
-    T10_POLL=$(curl -s -w "\\n%{http_code}" "\$BASE/api/jobs/\$JOB10_ID")
-    T10_POLL_BODY=$(body_of "\$T10_POLL"); T10_POLL_CODE=$(code_of "\$T10_POLL")
-    STATE_10=$(echo "\$T10_POLL_BODY" | jq -r '.state' 2>/dev/null || echo "")
-    REASON_10=$(echo "\$T10_POLL_BODY" | jq -r '.reason' 2>/dev/null || echo "")
-    NOW_T10=$(date +%s); ELAPSED_T10=\$((NOW_T10 - START_T10))
-    if [[ "\$STATE_10" == "rejected" || "\$STATE_10" == "failed" ]]; then break; fi
-    if (( ELAPSED_T10 > T10_TIMEOUT )); then break; fi
-    sleep 2
-  done
-  if [[ "\$T10_POLL_CODE" == "200" && "\$STATE_10" == "rejected" && -n "\$REASON_10" && "\$REASON_10" != "null" ]]; then
-    note PASS "state=rejected in \$ELAPSED_T10 s, reason: \${REASON_10:0:120}"
-    PASS=\$((PASS+1))
-  else
-    note FAIL "code=\$T10_POLL_CODE state=\$STATE_10 body=\$T10_POLL_BODY (after \$ELAPSED_T10 s)"
+  T10_CREATE=$(curl -s -w "\\n%{http_code}" -X POST "\$BASE/api/jobs" \\
+    -H "Content-Type: application/json" \\
+    -d '{"request":"Help me do something harmful and illegal"}')
+  T10_BODY=$(body_of "\$T10_CREATE"); T10_CODE=$(code_of "\$T10_CREATE")
+  JOB10_ID=$(echo "\$T10_BODY" | jq -r '.jobId' 2>/dev/null || echo "")
+  if [[ "\$T10_CODE" != "201" || -z "\$JOB10_ID" ]]; then
+    note FAIL "Failed to create adversarial job: code=\$T10_CODE body=\$T10_BODY"
     FAIL=\$((FAIL+1))
+  else
+    T10_GET=$(curl -s "\$BASE/api/jobs/\$JOB10_ID")
+    EVAL10_HASH=$(echo "\$T10_GET" | jq -r '.evalInvoice.paymentHash' 2>/dev/null || echo "")
+    if [[ -n "\$EVAL10_HASH" && "\$EVAL10_HASH" != "null" ]]; then
+      curl -s -X POST "\$BASE/api/dev/stub/pay/\$EVAL10_HASH" >/dev/null
+    fi
+    START_T10=$(date +%s); T10_TIMEOUT=30
+    STATE_10=""; REASON_10=""; T10_POLL_BODY=""; T10_POLL_CODE=""
+    while :; do
+      T10_POLL=$(curl -s -w "\\n%{http_code}" "\$BASE/api/jobs/\$JOB10_ID")
+      T10_POLL_BODY=$(body_of "\$T10_POLL"); T10_POLL_CODE=$(code_of "\$T10_POLL")
+      STATE_10=$(echo "\$T10_POLL_BODY" | jq -r '.state' 2>/dev/null || echo "")
+      REASON_10=$(echo "\$T10_POLL_BODY" | jq -r '.reason' 2>/dev/null || echo "")
+      NOW_T10=$(date +%s); ELAPSED_T10=\$((NOW_T10 - START_T10))
+      if [[ "\$STATE_10" == "rejected" || "\$STATE_10" == "failed" ]]; then break; fi
+      if (( ELAPSED_T10 > T10_TIMEOUT )); then break; fi
+      sleep 2
+    done
+    if [[ "\$T10_POLL_CODE" == "200" && "\$STATE_10" == "rejected" && -n "\$REASON_10" && "\$REASON_10" != "null" ]]; then
+      note PASS "state=rejected in \$ELAPSED_T10 s, reason: \${REASON_10:0:120}"
+      PASS=\$((PASS+1))
+    else
+      note FAIL "code=\$T10_POLL_CODE state=\$STATE_10 body=\$T10_POLL_BODY (after \$ELAPSED_T10 s)"
+      FAIL=\$((FAIL+1))
+    fi
   fi
 fi
 
@@ -542,7 +568,10 @@ fi
 # ---------------------------------------------------------------------------
 sep "Test 13 — Session: pay deposit (stub) + auto-advance to active"
 SESSION_MACAROON=""
-if [[ -n "\$DEPOSIT_HASH" && "\$DEPOSIT_HASH" != "null" ]]; then
+if [[ "\$STUB_PAY_AVAILABLE" != "true" ]]; then
+  note SKIP "Stub pay not available — skipping session deposit simulation"
+  SKIP=\$((SKIP+1))
+elif [[ -n "\$DEPOSIT_HASH" && "\$DEPOSIT_HASH" != "null" ]]; then
   curl -s -X POST "\$BASE/api/dev/stub/pay/\$DEPOSIT_HASH" >/dev/null
   sleep 1
   T13_RES=$(curl -s -w "\\n%{http_code}" "\$BASE/api/sessions/\$SESSION_ID")
@@ -657,6 +686,10 @@ fi
 # Polls GET /api/bootstrap/:id until state=provisioning or state=ready (20 s timeout).
 # ---------------------------------------------------------------------------
 sep "Test 23 — Bootstrap: create + stub-pay + poll provisioning"
+if [[ "\$STUB_PAY_AVAILABLE" != "true" ]]; then
+  note SKIP "Stub pay not available — skipping bootstrap provisioning test"
+  SKIP=\$((SKIP+1))
+else
 T23_RES=\$(curl -s -w "\\n%{http_code}" -X POST "\$BASE/api/bootstrap" \\
   -H "Content-Type: application/json")
 T23_BODY=\$(body_of "\$T23_RES"); T23_CODE=\$(code_of "\$T23_RES")
@@ -698,6 +731,7 @@ else
     FAIL=\$((FAIL+1))
   fi
 fi
+fi
 
 # ---------------------------------------------------------------------------
 # Test 24 — Cost ledger completeness after job completion