diff --git a/kidlisp/tools/logs.mjs b/kidlisp/tools/logs.mjs
new file mode 100755
index 000000000..fe69ed550
--- /dev/null
+++ b/kidlisp/tools/logs.mjs
@@ -0,0 +1,161 @@
+#!/usr/bin/env node
+// KidLisp Log Viewer (admin-only)
+// Pulls client-side telemetry from /api/kidlisp-log and /api/boot-log
+//
+// Auth: set AC_ADMIN_TOKEN env var or pass --token <bearer-token>
+//
+// Usage:
+//   ./logs.mjs                     # recent kidlisp logs (default 20)
+//   ./logs.mjs --limit 50          # last 50 entries
+//   ./logs.mjs --type gpu-disabled # filter by log type
+//   ./logs.mjs --since 2026-03-20  # logs since date
+//   ./logs.mjs --boots             # boot telemetry instead
+//   ./logs.mjs --boots --errors    # only boot errors
+//   ./logs.mjs --stats             # type breakdown counts
+//   ./logs.mjs --token <token>     # pass auth token inline
+
+const BASE = process.env.AC_API_URL || "https://aesthetic.computer";
+
+const args = process.argv.slice(2);
+function flag(name) {
+  return args.includes(`--${name}`);
+}
+function opt(name, fallback) {
+  const i = args.indexOf(`--${name}`);
+  return i !== -1 && args[i + 1] ? args[i + 1] : fallback;
+}
+
+const token = opt("token", null) || process.env.AC_ADMIN_TOKEN;
+if (!token) {
+  console.error(
+    "Admin token required. Set AC_ADMIN_TOKEN or pass --token <bearer-token>",
+  );
+  process.exit(1);
+}
+
+const authHeaders = { Authorization: `Bearer ${token}` };
+
+async function main() {
+  if (flag("boots")) {
+    await fetchBoots();
+  } else {
+    await fetchKidlispLogs();
+  }
+}
+
+async function fetchKidlispLogs() {
+  const limit = opt("limit", "20");
+  const type = opt("type", null);
+  const since = opt("since", null);
+  const ua = opt("ua", null);
+
+  const params = new URLSearchParams({ limit });
+  if (type) params.set("type", type);
+  if (since) params.set("since", since);
+  if (ua) params.set("ua", ua);
+
+  const url = `${BASE}/api/kidlisp-log?${params}`;
+  const res = await fetch(url, { headers: authHeaders });
+  if (!res.ok) {
+    console.error(`Error ${res.status}: ${await res.text()}`);
+    process.exit(1);
+  }
+
+  const { logs, stats } = await res.json();
+
+  if (flag("stats")) {
+    console.log("\n  Type breakdown:");
+    for (const s of stats) {
+      console.log(`    ${s._id}: ${s.count}`);
+    }
+    console.log();
+    return;
+  }
+
+  if (logs.length === 0) {
+    console.log("No logs found.");
+    return;
+  }
+
+  for (const log of logs) {
+    const date = new Date(log.createdAt).toLocaleString();
+    const device = log.device?.userAgent?.slice(0, 60) || "unknown";
+    const country = log.server?.country || "??";
+    const detail = log.detail
+      ? typeof log.detail === "object"
+        ? JSON.stringify(log.detail)
+        : log.detail
+      : "";
+    console.log(
+      `[${date}] ${log.type || "?"}  ${country}  ${log.effect || ""}  ${detail}`,
+    );
+    console.log(`  device: ${device}`);
+    if (log.gpuStatus) {
+      const failed = Object.entries(log.gpuStatus)
+        .filter(([, v]) => v > 0)
+        .map(([k, v]) => `${k}:${v}`);
+      if (failed.length) console.log(`  gpu failures: ${failed.join(", ")}`);
+    }
+  }
+  console.log(`\n  Showing ${logs.length} entries.`);
+}
+
+async function fetchBoots() {
+  const limit = opt("limit", "30");
+  const params = new URLSearchParams({ limit });
+
+  const url = `${BASE}/api/boot-log?${params}`;
+  const res = await fetch(url, { headers: authHeaders });
+  if (!res.ok) {
+    console.error(`Error ${res.status}: ${await res.text()}`);
+    process.exit(1);
+  }
+
+  const { boots } = await res.json();
+
+  const errorsOnly = flag("errors");
+  const filtered = errorsOnly
+    ? boots.filter((b) => b.status === "error")
+    : boots;
+
+  if (filtered.length === 0) {
+    console.log(errorsOnly ? "No boot errors found." : "No boot logs found.");
+    return;
+  }
+
+  for (const boot of filtered) {
+    const date = new Date(boot.createdAt).toLocaleString();
+    const status = boot.status || "?";
+    const host = boot.meta?.host || "?";
+    const path = boot.meta?.path || "/";
+    const country = boot.server?.country || "??";
+
+    const icon =
+      status === "error" ? "X" : status === "success" ? "+" : "-";
+
+    console.log(`[${icon}] ${date}  ${status}  ${country}  ${host}${path}`);
+
+    if (boot.error) {
+      const errMsg =
+        typeof boot.error === "string"
+          ? boot.error
+          : boot.error.message || JSON.stringify(boot.error).slice(0, 120);
+      console.log(`    error: ${errMsg}`);
+    }
+
+    if (boot.events?.length) {
+      const errEvents = boot.events.filter(
+        (e) => e.level === "error" || e.label?.includes("error"),
+      );
+      for (const ev of errEvents) {
+        console.log(`    event: ${ev.label || ev.message || JSON.stringify(ev)}`);
+      }
+    }
+  }
+  console.log(`\n  Showing ${filtered.length} of ${boots.length} entries.`);
+}
+
+main().catch((err) => {
+  console.error(err);
+  process.exit(1);
+});
diff --git a/system/netlify/functions/boot-log.mjs b/system/netlify/functions/boot-log.mjs
index 9a5bfbf05..a184fd417 100644
--- a/system/netlify/functions/boot-log.mjs
+++ b/system/netlify/functions/boot-log.mjs
@@ -2,6 +2,7 @@
 // POST /api/boot-log
 
 import { connect } from "../../backend/database.mjs";
+import { authorize, hasAdmin } from "../../backend/authorization.mjs";
 import { respond } from "../../backend/http.mjs";
 
 export async function handler(event) {
@@ -10,6 +11,11 @@ export async function handler(event) {
   }
 
   if (event.httpMethod === "GET") {
+    // Admin-only: require auth
+    const user = await authorize(event.headers);
+    if (!user) return respond(401, { error: "Authentication required" });
+    if (!(await hasAdmin(user))) return respond(403, { error: "Admin access required" });
+
     try {
       const database = await connect();
       const boots = database.db.collection("boots");
diff --git a/system/netlify/functions/kidlisp-log.mjs b/system/netlify/functions/kidlisp-log.mjs
index 3105679e9..29cd4767b 100644
--- a/system/netlify/functions/kidlisp-log.mjs
+++ b/system/netlify/functions/kidlisp-log.mjs
@@ -3,6 +3,7 @@
 // GET  /api/kidlisp-log — query recent logs (with optional filters)
 
 import { connect } from "../../backend/database.mjs";
+import { authorize, hasAdmin } from "../../backend/authorization.mjs";
 import { respond } from "../../backend/http.mjs";
 
 const COLLECTION = "kidlisp-logs";
@@ -13,6 +14,11 @@ export async function handler(event) {
   }
 
   if (event.httpMethod === "GET") {
+    // Admin-only: require auth
+    const user = await authorize(event.headers);
+    if (!user) return respond(401, { error: "Authentication required" });
+    if (!(await hasAdmin(user))) return respond(403, { error: "Admin access required" });
+
     try {
       const database = await connect();
       const col = database.db.collection(COLLECTION);
@@ -45,7 +51,11 @@ export async function handler(event) {
   }
 
   if (event.httpMethod === "DELETE") {
-    // Purge logs (for silo admin use)
+    // Admin-only: require auth
+    const delUser = await authorize(event.headers);
+    if (!delUser) return respond(401, { error: "Authentication required" });
+    if (!(await hasAdmin(delUser))) return respond(403, { error: "Admin access required" });
+
     try {
       const database = await connect();
       const col = database.db.collection(COLLECTION);
diff --git a/system/public/aesthetic.computer/lib/kidlisp.mjs b/system/public/aesthetic.computer/lib/kidlisp.mjs
index f48e7d3bd..7d64ee927 100644
--- a/system/public/aesthetic.computer/lib/kidlisp.mjs
+++ b/system/public/aesthetic.computer/lib/kidlisp.mjs
@@ -7079,15 +7079,28 @@ class KidLisp {
           // For the first argument (image source), support unquoted URLs, paths, #codes, and @handles
           if (index === 0 && typeof arg === "string" && arg) {
             // If it's a URL (http/https), path, #code, or @handle, treat it as unquoted
-            if (arg.startsWith("http://") || arg.startsWith("https://") || 
+            if (arg.startsWith("http://") || arg.startsWith("https://") ||
                 arg.includes("/") || arg.includes("@") || arg.startsWith("#")) {
               return arg; // Return as-is for URLs, paths, #codes, and @handle/timestamp patterns
             }
           }
           // Evaluate expressions for non-string arguments (like math expressions)
-          return this.evaluate(arg, api, this.localEnv);
+          const result = this.evaluate(arg, api, this.localEnv);
+          // Guard: if first arg evaluated to a function (e.g. builtin name
+          // like "circle"), treat the raw string as an image code instead.
+          if (index === 0 && typeof result === "function") {
+            return typeof arg === "string" ? arg : result;
+          }
+          return result;
         });
 
+        // Bail out if the image source is invalid (not a string or bitmap)
+        if (processedArgs.length > 0 && typeof processedArgs[0] !== "string" &&
+            (typeof processedArgs[0] !== "object" || !processedArgs[0]?.width)) {
+          console.warn("⚠️ stamp: invalid image source", processedArgs[0]);
+          return;
+        }
+
         const performStamp = () => {
           api.stamp(...processedArgs);
         };