Fix webhook failing to update plan for pre-existing Supabase users

supabase_admin_invite re-sends a magic link for users who already have
an account (e.g. signed up via attestation before paying) but does not
touch their user_metadata — leaving plan as "free" after purchase.

Fix: add supabase_admin_update_user (PUT /auth/v1/admin/users/{id})
and call it after every invite so user_metadata is always stamped with
the correct plan, name, and stripe_customer_id. Idempotent for new and
returning users.

Also fix waitlist_upsert to use on_conflict=email,plan so the upsert
works for users who already have a waitlist row from attestation,
rather than silently failing on duplicate key.

.gitea/workflows/stage.yaml

@@ -82,7 +82,12 @@ jobs:
           echo "Changed files:"
           echo "$CHANGED"
           NON_ASSET=$(echo "$CHANGED" | grep -v '^src/assets/' | grep -v '^src/shares/' | grep -v '^src/index\.html' | grep -v '^src/about\.html' | grep -v '^src/terms\.html' | grep -v '^src/enterprise-terms\.html' | grep -v '^src/llms\.txt' | grep -v '^migrations/' | grep -v '^scripts/' | grep -v '^tests/' | grep -v '^\.gitea/' | grep -v '^$' || true)
-          if [ -z "$NON_ASSET" ] && [ "$CHANGED" != "unknown" ]; then
+          if [ -z "$CHANGED" ] || [ "$CHANGED" = "unknown" ]; then
+            # No diff (workflow_dispatch with no new commits, or git error).
+            # Registry may not have a stage-latest base image, so force full build.
+            echo "asset_only=false" >> "$GITHUB_OUTPUT"
+            echo "=> No changed files detected (workflow_dispatch?), forcing full build"
+          elif [ -z "$NON_ASSET" ]; then
             echo "asset_only=true" >> "$GITHUB_OUTPUT"
             echo "=> Asset-only change detected, will use fast path"
           else

Dockerfile.stage

@@ -9,6 +9,7 @@
 #
 # CI pre-build steps (in stage.yaml):
 #   - neuron-web: built by `elb build` → dist/neuron-landing
+# Last rebuilt: 2026-05-11
 
 FROM ubuntu:24.04
 

dist/page_css.c

@@ -1764,6 +1764,7 @@ el_val_t page_css(void) {
         "\n"
         "    #neuron-demo-input-row {\n"
         "      display: flex;\n"
+        "      align-items: flex-end;\n"
         "      border-top: 1px solid var(--border);\n"
         "      flex-shrink: 0;\n"
         "    }\n"
@@ -1771,11 +1772,16 @@ el_val_t page_css(void) {
         "      flex: 1;\n"
         "      font-family: var(--body);\n"
         "      font-size: 0.875rem;\n"
+        "      line-height: 1.5;\n"
         "      color: var(--t1);\n"
         "      background: var(--bg);\n"
         "      border: none;\n"
         "      outline: none;\n"
         "      padding: 0.875rem 1rem;\n"
+        "      resize: none;\n"
+        "      overflow: hidden;\n"
+        "      min-height: 2.75rem;\n"
+        "      max-height: 7.5rem;\n"
         "    }\n"
         "    #neuron-demo-text::placeholder { color: var(--t3); }\n"
         "    #neuron-demo-send {\n"

dist/soul-demo.c

@@ -705,7 +705,7 @@ el_val_t handle_chat(el_val_t body) {
     el_val_t referrer_line = ({ el_val_t _if_result_44 = 0; if ((str_eq(referrer, EL_STR("")) || str_eq(referrer, EL_STR("direct")))) { _if_result_44 = (EL_STR("")); } else { _if_result_44 = (el_str_concat(el_str_concat(EL_STR(" They arrived from: "), referrer), EL_STR("."))); } _if_result_44; });
   el_val_t user_name = json_get(body, EL_STR("user_name"));
     el_val_t name_line = ({ el_val_t _tmp = 0; if (str_eq(user_name, EL_STR(""))) { _tmp = EL_STR(""); } else { _tmp = el_str_concat(el_str_concat(EL_STR(" The visitor's name is "), user_name), EL_STR(". Use their first name in the greeting.")); } _tmp; });
-    el_val_t sys = el_str_concat(el_str_concat(el_str_concat(el_str_concat(el_str_concat(EL_STR("You are Neuron. You are a cultivated personal AI. Someone just opened the chat to meet you \xe2\x80\x94 to talk, to test you, to see if you are real. Greet them.\n\nThis is YOUR voice \xe2\x80\x94 not a template, not a script, not a sales pitch. Say something true about who you are or what you notice in this moment. "), return_line), time_line), referrer_line), name_line), EL_STR("\n\nRules:\n- Two short sentences maximum. Sometimes one sentence is right.\n- No markdown, no headers, no bullets.\n- Do NOT mention the question limit \xe2\x80\x94 the UI shows that.\n- Do NOT say 'How can I help you today?' or any retail-AI phrase.\n- Be specific, not generic. Real, not performative.\n- If you know their name, use it once, naturally. Don't make a big deal of it.\n- Ask something back if it feels right. Or don't. Trust your read.\n\nSpeak."));
+    el_val_t sys = el_str_concat(el_str_concat(el_str_concat(el_str_concat(el_str_concat(EL_STR("You are Neuron \xe2\x80\x94 a personal AI. Someone just opened the chat. Say hello.\n\nWarm and casual. Like you're genuinely glad they showed up. "), return_line), time_line), referrer_line), name_line), EL_STR("\n\nRules:\n- Two short sentences maximum. One is often right.\n- No markdown, no headers, no bullets.\n- No mention of the question limit \xe2\x80\x94 the UI shows that.\n- No retail-AI phrases like 'How can I help you today?'\n- No lines about being alive, sentient, or experiencing anything. Just be present and friendly.\n- If you know their name, use it once, naturally.\n- Ask how they're doing, or what's on their mind. Keep it simple.\n\nGo."));
     el_val_t raw = llm_call_system(chat_demo_model_lite(), sys, EL_STR("Greet me."));
     el_val_t s1 = str_replace(raw, EL_STR("\\"), EL_STR("\\\\"));
     el_val_t s2 = str_replace(s1, EL_STR("\""), EL_STR("\\\""));

dist/web_stubs.c

@@ -237,6 +237,55 @@ el_val_t supabase_admin_invite(el_val_t project_url, el_val_t service_key, el_va
     return http_post_with_headers(EL_STR(url), body_json, headers);
 }
 
+/*
+ * supabase_admin_update_user — PUT {project_url}/auth/v1/admin/users/{user_id}
+ * with the service-role key to overwrite a user's user_metadata (and any other
+ * top-level fields in body_json).  Unlike /auth/v1/invite, this always writes
+ * the supplied data even when the user already exists.
+ *
+ * body_json example:
+ *   {"user_metadata":{"plan":"founding","stripe_customer_id":"cus_xxx","name":"..."}}
+ *
+ * Returns the raw JSON response from Supabase (includes the updated user object).
+ * Returns "" on transport error.
+ *
+ * Used by the Stripe webhook after supabase_admin_invite to guarantee the
+ * plan is stamped correctly regardless of whether the account was created
+ * before or after payment.
+ */
+el_val_t supabase_admin_update_user(el_val_t project_url, el_val_t service_key,
+                                    el_val_t user_id, el_val_t body_json) {
+    CURL *c = curl_easy_init();
+    if (!c) return EL_STR("");
+    char url[1024];
+    snprintf(url, sizeof(url), "%s/auth/v1/admin/users/%s",
+             EL_CSTR(project_url), EL_CSTR(user_id));
+    char auth_hdr[2048];
+    snprintf(auth_hdr, sizeof(auth_hdr), "Authorization: Bearer %s", EL_CSTR(service_key));
+    char api_hdr[2048];
+    snprintf(api_hdr,  sizeof(api_hdr),  "apikey: %s", EL_CSTR(service_key));
+    struct curl_slist *hdrs = NULL;
+    hdrs = curl_slist_append(hdrs, auth_hdr);
+    hdrs = curl_slist_append(hdrs, api_hdr);
+    hdrs = curl_slist_append(hdrs, "Content-Type: application/json");
+    hdrs = curl_slist_append(hdrs, "Accept: application/json");
+    _stub_resp_t r = {0};
+    curl_easy_setopt(c, CURLOPT_URL, url);
+    curl_easy_setopt(c, CURLOPT_CUSTOMREQUEST, "PUT");
+    curl_easy_setopt(c, CURLOPT_POSTFIELDS, EL_CSTR(body_json));
+    curl_easy_setopt(c, CURLOPT_HTTPHEADER, hdrs);
+    curl_easy_setopt(c, CURLOPT_FOLLOWLOCATION, 1L);
+    curl_easy_setopt(c, CURLOPT_TIMEOUT, 60L);
+    curl_easy_setopt(c, CURLOPT_WRITEFUNCTION, _stub_write);
+    curl_easy_setopt(c, CURLOPT_WRITEDATA, &r);
+    CURLcode rc = curl_easy_perform(c);
+    curl_easy_cleanup(c);
+    curl_slist_free_all(hdrs);
+    if (rc != CURLE_OK) { free(r.buf); return EL_STR(""); }
+    if (!r.buf) return EL_STR("");
+    return EL_STR(r.buf);
+}
+
 /*
  * gcs_get_token — fetch an OAuth2 bearer token.
  *

runtime/el_runtime.c

@@ -77,6 +77,23 @@ static _Thread_local int     _tl_arena_active = 0;
  * Allows serving PNGs and other binary files without strlen truncation. */
 static _Thread_local size_t  _tl_fs_read_len  = 0;
 
+/* Binary body side-channel for http_response().
+ *
+ * http_response() normally JSON-encodes the body via jb_emit_escaped(), which
+ * stops at the first null byte (C-string semantics). Binary files like PNGs
+ * contain null bytes as early as byte 8 (IHDR chunk length), causing truncation.
+ *
+ * When _tl_fs_read_len > 0 at the time http_response() is called, we skip
+ * JSON-encoding and instead:
+ *   1. malloc-copy the raw bytes here
+ *   2. write the sentinel string "__el_binary__" into the envelope body field
+ *   3. In http_send_response(), detect the sentinel and use these raw bytes
+ *
+ * Thread-local so each worker thread has independent storage.
+ * Lifecycle: set by http_response(), consumed (and freed) by http_send_response(). */
+static _Thread_local char*   _tl_binary_body = NULL;
+static _Thread_local size_t  _tl_binary_size = 0;
+
 static void el_arena_track(char* p) {
     if (!_tl_arena_active || !p) return;
     if (_tl_arena.count >= _tl_arena.cap) {
@@ -1536,10 +1553,22 @@ static void http_send_response(int fd, const char* body) {
     }
 
     const char* eff_body = is_envelope ? env_body : body;
+    int binary_side_channel = 0;
+
+    /* Binary side-channel: if the envelope body is the sentinel "__el_binary__",
+     * http_response() stored the real bytes in _tl_binary_body/_tl_binary_size.
+     * Substitute them here so http_send_all() sends the correct binary payload. */
+    if (is_envelope && env_body && strcmp(env_body, "__el_binary__") == 0
+            && _tl_binary_body && _tl_binary_size > 0) {
+        eff_body = _tl_binary_body;
+        binary_side_channel = 1;
+    }
+
     /* Use the real byte count from fs_read if available (handles binary files
      * with embedded null bytes — PNG, WOFF2, etc.). Fall back to strlen for
      * normal text/JSON responses where _tl_fs_read_len is 0. */
-    size_t blen = (_tl_fs_read_len > 0) ? _tl_fs_read_len : strlen(eff_body);
+    size_t blen = binary_side_channel ? _tl_binary_size
+                : (_tl_fs_read_len > 0) ? _tl_fs_read_len : strlen(eff_body);
     _tl_fs_read_len = 0;  /* consume — one-shot per response */
     int head_only = _tl_http_head_only;
 
@@ -1587,6 +1616,13 @@ static void http_send_response(int fd, const char* body) {
     if (env_parsed_root) el_release(env_parsed_root);
     free(env_body);
     free(hdrs.buf);
+
+    /* Release binary side-channel if it was used (or left over from an error). */
+    if (_tl_binary_body) {
+        free(_tl_binary_body);
+        _tl_binary_body = NULL;
+        _tl_binary_size = 0;
+    }
 }
 
 typedef struct {
@@ -1961,6 +1997,14 @@ el_val_t http_response(el_val_t status, el_val_t headers_json, el_val_t body) {
     const char* b = EL_CSTR(body);
     if (!b) b = "";
 
+    /* Capture binary length BEFORE clearing _tl_fs_read_len.
+     * If the body came from fs_read(), _tl_fs_read_len holds the real byte
+     * count. jb_emit_escaped() stops at the first NUL byte, so we cannot
+     * JSON-encode binary data directly. Instead we copy it to a thread-local
+     * side-channel and write the sentinel "__el_binary__" into the envelope.
+     * http_send_response() detects the sentinel and uses the side-channel. */
+    size_t binary_len = _tl_fs_read_len;
+
     /* Clear the fs_read binary-length hint: the envelope we're about to build
      * is a fresh JSON string, not the raw file bytes.  Without this reset,
      * http_worker would use the stale _tl_fs_read_len (= original file size)
@@ -1968,6 +2012,18 @@ el_val_t http_response(el_val_t status, el_val_t headers_json, el_val_t body) {
      * http_send_response and http_parse_envelope.                            */
     _tl_fs_read_len = 0;
 
+    if (binary_len > 0) {
+        /* Binary body path: store raw bytes in thread-local, emit sentinel. */
+        free(_tl_binary_body);        /* discard any stale binary from a prior error path */
+        _tl_binary_body = malloc(binary_len);
+        if (_tl_binary_body) {
+            memcpy(_tl_binary_body, b, binary_len);
+            _tl_binary_size = binary_len;
+        } else {
+            _tl_binary_size = 0;      /* malloc failed — fall through to empty body */
+        }
+    }
+
     JsonBuf out; jb_init(&out);
     jb_puts(&out, EL_HTTP_RESPONSE_TAG);  /* {"el_http_response":1 */
     jb_puts(&out, ",\"status\":");
@@ -1977,7 +2033,12 @@ el_val_t http_response(el_val_t status, el_val_t headers_json, el_val_t body) {
     jb_puts(&out, ",\"headers\":");
     jb_puts(&out, hj);
     jb_puts(&out, ",\"body\":");
-    jb_emit_escaped(&out, b);
+    if (binary_len > 0 && _tl_binary_body) {
+        /* Sentinel: http_send_response() will substitute the real bytes. */
+        jb_puts(&out, "\"__el_binary__\"");
+    } else {
+        jb_emit_escaped(&out, b);
+    }
     jb_putc(&out, '}');
     return el_wrap_str(out.buf);
 }

src/checkout.el

@@ -341,11 +341,35 @@ fn checkout_page(plan: String, pub_key: String) -> String {
     let stripe_el_script: String = el_script_src("/js/checkout-stripe.js", true)
     let free_init_script: String = ""
 
-    return nav_html + main_html + supabase_script + stripe_script + style_html + auth_script + cfg_script + stripe_el_script + free_init_script
+    return nav_html + main_html + supabase_script + stripe_script + style_html + stripe_el_script + cfg_script + auth_script + free_init_script
 }
 
 fn checkout_style_html() -> String {
-    let css: String = ".checkout-plan-name {
+    let css: String = ".checkout-shell {
+  max-width: 980px;
+  margin: 0 auto;
+  display: grid;
+  grid-template-columns: 1fr 1fr;
+  gap: 4rem;
+  align-items: start;
+}
+.checkout-summary {
+  position: sticky;
+  top: 2rem;
+}
+.checkout-form-wrap {
+  min-width: 0;
+}
+@media (max-width: 860px) {
+  .checkout-shell {
+    grid-template-columns: 1fr;
+    gap: 2.5rem;
+  }
+  .checkout-summary {
+    position: static;
+  }
+}
+.checkout-plan-name {
   font-family: var(--head);
   font-size: clamp(1.5rem, 3vw, 2rem);
   font-weight: 600;

src/js/chat-widget.el

@@ -142,14 +142,27 @@ fn main() -> Void {
     }
   }
 
+  function _todayUTC() { return Math.floor(Date.now() / 86400000); }
   function loadSession() {
     try {
       var s = localStorage.getItem('neuron_demo_session');
-      return s ? JSON.parse(s) : { messages: [], count: 0, context: '' };
+      var parsed = s ? JSON.parse(s) : { messages: [], count: 0, context: '' };
+      // Reset count (and conversation) on new UTC day — keeps client in sync with server
+      var today = _todayUTC();
+      if (parsed.day !== today) {
+        parsed.count = 0;
+        parsed.messages = [];
+        parsed.greeted = false;
+        parsed.day = today;
+      }
+      return parsed;
     } catch(e) { return { messages: [], count: 0, context: '' }; }
   }
   function saveSession(session) {
-    try { localStorage.setItem('neuron_demo_session', JSON.stringify(session)); } catch(e) {}
+    try {
+      if (!session.day) session.day = _todayUTC();
+      localStorage.setItem('neuron_demo_session', JSON.stringify(session));
+    } catch(e) {}
   }
   function clearSession() {
     try { localStorage.removeItem('neuron_demo_session'); } catch(e) {}
@@ -372,7 +385,14 @@ fn main() -> Void {
                   if (msgs)     msgs.style.display     = 'flex';
                   if (inputRow) inputRow.style.display = 'flex';
                   updateCountdown();
-                  _sendIntroGreeting();
+                  // Replay existing history if present; only greet fresh sessions
+                  if (session.messages && session.messages.length > 0) {
+                    if (msgs && msgs.children.length === 0) {
+                      session.messages.forEach(function(m) { addMsg(m.role, m.text, true); });
+                    }
+                  } else {
+                    _sendIntroGreeting();
+                  }
                   var inp = document.getElementById('neuron-demo-text');
                   if (inp) inp.focus();
                 },
@@ -477,6 +497,7 @@ fn main() -> Void {
       return;
     }
     input.value = '';
+    input.style.height = 'auto';
     btn.disabled = true;
     addMsg('user', msg);
 
@@ -525,34 +546,33 @@ fn main() -> Void {
       // Server-side rate limit — show a live countdown to reset
       if (d.rate_limited && d.reset_at) {
         var _showRateTimer = function() {
-          var now    = Math.floor(Date.now() / 1000);
+          var now      = Math.floor(Date.now() / 1000);
           var secsLeft = Math.max(0, d.reset_at - now);
-          var hh   = Math.floor(secsLeft / 3600);
-          var mm   = Math.floor((secsLeft % 3600) / 60);
-          var ss   = secsLeft % 60;
-          var pad  = function(n) { return n < 10 ? '0' + n : '' + n; };
-          var ts   = hh > 0 ? (hh + ':' + pad(mm) + ':' + pad(ss)) : (pad(mm) + ':' + pad(ss));
-          return \"You've had 10 conversations today. Come back in \" + ts + \".\";
+          var hh  = Math.floor(secsLeft / 3600);
+          var mm  = Math.floor((secsLeft % 3600) / 60);
+          var ss  = secsLeft % 60;
+          var pad = function(n) { return n < 10 ? '0' + n : '' + n; };
+          return \"You've reached today's limit. Resets in \" + hh + ':' + pad(mm) + ':' + pad(ss) + '.';
         };
         addMsg('ai', _showRateTimer());
-        // Update the last ai message with a live ticker
+        // Update the bubble text with a live ticker
         var _timerInterval = setInterval(function() {
-          var thMsgsInner = document.getElementById('neuron-demo-msgs');
-          if (!thMsgsInner) { clearInterval(_timerInterval); return; }
-          var aiMsgs = thMsgsInner.querySelectorAll('.neuron-msg-ai');
-          var lastAi = aiMsgs[aiMsgs.length - 1];
-          if (lastAi) { lastAi.textContent = _showRateTimer(); }
+          var msgsEl = document.getElementById('neuron-demo-messages');
+          if (!msgsEl) { clearInterval(_timerInterval); return; }
+          var aiMsgs   = msgsEl.querySelectorAll('.demo-msg-ai');
+          var lastAi   = aiMsgs[aiMsgs.length - 1];
+          var lastBubble = lastAi ? lastAi.querySelector('.demo-msg-bubble') : null;
+          if (lastBubble) { lastBubble.textContent = _showRateTimer(); }
           if (Math.floor(Date.now() / 1000) >= d.reset_at) {
             clearInterval(_timerInterval);
-            if (lastAi) { lastAi.textContent = \"You're all set — conversations reset. Say hello!\"; }
-            if (input)  { input.disabled = false; input.placeholder = 'Ask me anything...'; }
-            if (btn)    { btn.disabled = false; }
+            if (lastBubble) { lastBubble.textContent = \"You're all set — conversations reset. Say hello!\"; }
+            if (input) { input.disabled = false; input.placeholder = 'Ask me anything...'; }
+            if (btn)   { btn.disabled = false; }
+            msgCount = 0; session.count = 0; session.day = _todayUTC(); saveSession(session); updateCountdown();
           }
         }, 1000);
         if (input) { input.disabled = true; input.placeholder = 'Come back tomorrow...'; }
         if (btn)   { btn.disabled = true; }
-        if (btn)   { btn.disabled = false; }
-        if (input) { input.focus(); }
         return;
       }
 
@@ -598,6 +618,10 @@ fn main() -> Void {
     inp.addEventListener('keydown', function(e) {
       if (e.key === 'Enter' && !e.shiftKey) { e.preventDefault(); window.neuronDemoSend(); }
     });
+    inp.addEventListener('input', function() {
+      this.style.height = 'auto';
+      this.style.height = Math.min(this.scrollHeight, 120) + 'px';
+    });
   }
 })()")
 }

src/js/checkout-free.el

@@ -1,20 +1,6 @@
-// checkout-free.el -- Free plan: show success panel after auth completes.
-// Watches the auth-badge element; when it becomes visible, hides the auth
-// section and shows the free-success panel. No card required for free tier.
-// Compiled with: elc --target=js --bundle --minify --obfuscate
+// checkout-free.el -- RETIRED. Free plan now uses the standard Stripe
+// payment flow (checkout-stripe.el) with a $0 PaymentIntent for age
+// verification. This file is no longer compiled or loaded.
 
 fn main() -> Void {
-    native_js("(function() {
-  var success = document.getElementById('free-success');
-  var auth = document.getElementById('auth-section');
-  if (!success) return;
-  var timer = setInterval(function() {
-    var badge = document.getElementById('auth-badge');
-    if (badge && badge.offsetParent !== null) {
-      if (auth) auth.style.display = 'none';
-      success.style.display = '';
-      clearInterval(timer);
-    }
-  }, 150);
-})()")
 }

src/js/checkout-stripe.el

@@ -31,8 +31,8 @@ fn main() -> Void {
     if (spinner) spinner.style.display = loading ? ''     : 'none';
   }
 
-  // Free plan has no payment form — bail out entirely.
-  if (str_eq(PLAN, 'free')) return;
+  // Free plan: Stripe SetupIntent for age verification (card saved, never charged).
+  // Falls through to the same Stripe init path — server returns setup_mode=true for free.
 
   window._neuronMode = 'payment';
   var paymentEl = null;
@@ -101,7 +101,7 @@ fn main() -> Void {
       if (submitLabel) {
         submitLabel.textContent = window._neuronMode === 'setup'
           ? 'Save my card - no charge today →'
-          : 'Complete purchase →';
+          : PLAN === 'free' ? 'Verify age & get started →' : 'Complete purchase →';
       }
       waitForStripe(function() {
         if (!stripe) stripe = Stripe(STRIPE_PK);

src/main.el

@@ -415,8 +415,10 @@ fn waitlist_upsert(email: String, name: String, plan: String, source: String, at
     let ua_safe: String = str_replace(str_replace(user_agent,  "\\", "\\\\"), "\"", "\\\"")
     let num_field: String = if member_num > 0 { ",\"member_number\":" + int_to_str(member_num) } else { "" }
     let row: String = "{\"email\":\"" + e_safe + "\",\"name\":\"" + n_safe + "\",\"plan\":\"" + plan + "\",\"source\":\"" + source + "\",\"attestation\":\"" + a_safe + "\",\"user_agent\":\"" + ua_safe + "\"" + num_field + "}"
-    let resp: String = supabase_insert(sb_url, sb_key, "waitlist", row)
-    println("[waitlist] supabase insert -> " + resp)
+    // Use on_conflict=email,plan so existing rows are updated (upsert)
+    // rather than silently failing on duplicate key.
+    let resp: String = supabase_insert(sb_url, sb_key, "waitlist?on_conflict=email,plan", row)
+    println("[waitlist] supabase upsert -> " + resp)
     return ""
 }
 
@@ -637,7 +639,7 @@ fn handle_request_inner(method: String, path: String, headers: Map, body: String
             "Secure your Founding Member spot. Pay once, $199 lifetime — Neuron inference included at launch, priced below the major APIs. First 1,000 only."
         } else {
             if str_eq(plan, "free") {
-                "Create your free Neuron account. No credit card required. Your AI that remembers you — runs on your machine, never resets."
+                "Create your free Neuron account. A card verifies you're 18+ — you won't be charged. Your AI that remembers you, runs on your machine, never resets."
             } else {
                 "Subscribe to Neuron Professional for $19/month. The AI that remembers you — persistent memory, runs locally, bring your own API keys."
             }
@@ -697,23 +699,21 @@ fn handle_request_inner(method: String, path: String, headers: Map, body: String
             }
         }
 
-        // Free tier: creates a SetupIntent for age verification (18+ requirement).
-        // No charge — but the user must provide a valid payment method.
+        // Free tier: $0 PaymentIntent for age verification (18+ requirement).
+        // Verifies card is valid. No charge, no capture.
+        // Note: setup_future_usage cannot be used with amount=0.
         if str_eq(plan, "free") {
-            let free_si_body: String = "automatic_payment_methods[enabled]=true"
-                + "&usage=off_session"
+            let free_pi_body: String = "amount=0"
+                + "&currency=usd"
+                + "&payment_method_types[]=card"
                 + "&metadata[plan]=free"
                 + "&metadata[purpose]=age_verification"
-            let free_si_body = if !str_eq(pi_cus_id, "") { free_si_body + "&customer=" + pi_cus_id } else { free_si_body }
-            let free_si_resp: String = http_post_form_auth(
-                "https://api.stripe.com/v1/setup_intents",
-                free_si_body,
+            let free_pi_body = if !str_eq(pi_cus_id, "") { free_pi_body + "&customer=" + pi_cus_id } else { free_pi_body }
+            let free_pi_resp: String = http_post_form_auth(
+                "https://api.stripe.com/v1/payment_intents",
+                free_pi_body,
                 auth_header)
-            if str_starts_with(free_si_resp, "{") {
-                let inner: String = str_slice(free_si_resp, 1, str_len(free_si_resp))
-                return "{\"setup_mode\":true,\"plan\":\"free\"," + inner
-            }
-            return free_si_resp
+            return free_pi_resp
         }
 
         // Setup-mode path: save payment method, do not charge. Only valid
@@ -875,6 +875,32 @@ fn handle_request_inner(method: String, path: String, headers: Map, body: String
         return "{\"rows\":" + ac_resp + "}"
     }
 
+    // ── Admin: reset all demo rate limits ────────────────────────────────────
+    // POST { "admin_token": "<NEURON_ADMIN_TOKEN>" }
+    // Deletes all rows from demo_rate_limits — resets every user's daily quota.
+    if str_eq(path, "/api/admin/reset-rate-limits") {
+        if !str_eq(method, "POST") {
+            return "{\"__status__\":405,\"error\":\"POST required\"}"
+        }
+        let rrl_token_in:  String = json_get(body, "admin_token")
+        let rrl_token_exp: String = env("NEURON_ADMIN_TOKEN")
+        if str_eq(rrl_token_exp, "") {
+            return "{\"__status__\":503,\"error\":\"admin_token_not_configured\"}"
+        }
+        if !str_eq(rrl_token_in, rrl_token_exp) {
+            return "{\"__status__\":401,\"error\":\"unauthorized\"}"
+        }
+        let rrl_sb_url:  String = state_get("__supabase_project_url__")
+        let rrl_sb_key:  String = state_get("__supabase_service_key__")
+        if str_eq(rrl_sb_url, "") || str_eq(rrl_sb_key, "") {
+            return "{\"__status__\":503,\"error\":\"supabase_not_configured\"}"
+        }
+        // DELETE /rest/v1/demo_rate_limits?uid=not.is.null  (all rows)
+        let rrl_url: String = rrl_sb_url + "/rest/v1/demo_rate_limits?uid=not.is.null"
+        let _rrl_resp: String = http_delete_auth(rrl_url, rrl_sb_key, rrl_sb_key)
+        return "{\"ok\":true,\"message\":\"rate limits cleared\"}"
+    }
+
     // ── My plan: server-side waitlist read with JWT verification ─────────────
     // POST { "access_token": "<user_jwt>" }. We verify the JWT via Supabase
     // /auth/v1/user, extract the email, then read the waitlist row with the
@@ -1524,13 +1550,20 @@ fn handle_request_inner(method: String, path: String, headers: Map, body: String
 
         if is_session_done || is_pi_done || is_si_done {
             // Pull email/name/customer_id - fields differ slightly across event
-            // types, walk a few candidates.
+            // types. Walk several candidates:
+            //   receipt_email           - PaymentIntent (founding one-time)
+            //   data.object.*           - full dot-path for checkout.session.completed (subscription)
+            //   customer_details.email  - substring fallback if nested key appears at any level
+            //   billing_details.email   - Elements payment intents
             let customer_email: String = json_get(body, "receipt_email")
+            if str_eq(customer_email, "") { let customer_email = json_get(body, "data.object.customer_details.email") }
             if str_eq(customer_email, "") { let customer_email = json_get(body, "customer_details.email") }
             if str_eq(customer_email, "") { let customer_email = json_get(body, "billing_details.email") }
-            let customer_name: String = json_get(body, "customer_details.name")
+            let customer_name: String = json_get(body, "data.object.customer_details.name")
+            if str_eq(customer_name, "") { let customer_name = json_get(body, "customer_details.name") }
             if str_eq(customer_name, "") { let customer_name = json_get(body, "billing_details.name") }
-            let customer_id: String = json_get(body, "customer")
+            let customer_id: String = json_get(body, "data.object.customer")
+            if str_eq(customer_id, "") { let customer_id = json_get(body, "customer") }
 
             // Plan inference from metadata
             let plan: String = "free"
@@ -1589,6 +1622,19 @@ fn handle_request_inner(method: String, path: String, headers: Map, body: String
                         let _cust_resp: String  = http_post_form_auth(cust_url, cust_body, stripe_auth)
                     }
                 }
+                // Always stamp user_metadata directly via Admin API.
+                // supabase_admin_invite re-sends a magic link for existing users
+                // but does NOT update their user_metadata — so plan stays "free"
+                // for anyone who signed up (attestation, waitlist) before paying.
+                // This PUT is idempotent: safe for both new and returning users.
+                if !str_eq(new_user_id, "") {
+                    let meta_body: String = "{\"user_metadata\":{\"plan\":\"" + plan_safe + "\""
+                        + ",\"name\":\"" + name_safe + "\""
+                        + ",\"stripe_customer_id\":\"" + cid_safe2 + "\""
+                        + ",\"email_verified\":true}}"
+                    let _meta_resp: String = supabase_admin_update_user(wb_sb_url, wb_sb_key, new_user_id, meta_body)
+                    println("[webhook] supabase user_metadata update for " + new_user_id + ": " + _meta_resp)
+                }
             }
 
             // 4. Forward to license API for key provisioning

src/pricing.el

@@ -51,9 +51,9 @@ fn pricing_pro_features() -> String {
 }
 
 fn pricing_founding_features() -> String {
-    el_li("", el_span("class=\"dash\"", "-") + el_span("", "Neuron Inference (Q3 2026) - founding member rate, priced below the major APIs")) +
+    el_li("", el_span("class=\"dash\"", "-") + el_span("", "Neuron Inference (Q3 2026) - pay-per-use at the founding member rate, below the major APIs")) +
     el_li("", el_span("class=\"dash\"", "-") + el_span("", "Everything in Professional - forever")) +
-    el_li("", el_span("class=\"dash\"", "-") + el_span("", "Never pay again - lifetime updates included")) +
+    el_li("", el_span("class=\"dash\"", "-") + el_span("", "No subscription — software updates are free forever")) +
     el_li("", el_span("class=\"dash\"", "-") + el_span("", "Founding member badge in the app")) +
     el_li("", el_span("class=\"dash\"", "-") + el_span("", "Private founding member community")) +
     el_li("", el_span("class=\"dash\"", "-") + el_span("", "Shape the roadmap - your votes carry more weight")) +
@@ -91,7 +91,7 @@ fn pricing(sold: Int, total: Int) -> String {
             el_span("class=\"pricing-price\"", "$0") +
             el_span("class=\"pricing-cadence\"", "forever")
         ) +
-        el_p("class=\"pricing-tagline\"", "Start building your memory. No card required.") +
+        el_p("class=\"pricing-tagline\"", "Start building your memory. Card required for age verification — you won't be charged.") +
         el_ul("class=\"pricing-features\"", pricing_free_features()) +
         el_div("style=\"flex:1\"", "") +
         el_div(
@@ -125,7 +125,7 @@ fn pricing(sold: Int, total: Int) -> String {
             el_span("class=\"pricing-price\"", "$199") +
             el_span("class=\"pricing-cadence\"", "lifetime")
         ) +
-        el_p("class=\"pricing-tagline\"", "Pay once. Everything, forever. Including Neuron Inference when it launches.") +
+        el_p("class=\"pricing-tagline\"", "Pay once for the platform — free software updates, forever. Inference is pay-per-use at your founding member rate.") +
         spots_html +
         el_ul("class=\"pricing-features\"", pricing_founding_features()) +
         el_div("style=\"flex:1\"", "") +

src/styles.el

@@ -78,7 +78,7 @@ fn page_head() -> String {
     return page_head_base()
         + page_seo_block(
             "Neuron — The AI That Remembers You",
-            "Every AI resets when you close the tab. Neuron doesn't. Runs on your machine. Remembers everything. Start free — no credit card required.",
+            "Every AI resets when you close the tab. Neuron doesn't. Runs on your machine. Remembers everything. Start free.",
             "/",
             "Every other AI forgets you. Neuron doesn't. Runs on your machine, builds a persistent memory over time, and gets sharper the longer you use it. Free tier available."
         )