Remove the signup code; applications always queue for MA review, invite per node

AGENTS.md

@@ -32,7 +32,7 @@
 - Relay backpressure is global: any member's full queue 429s every publisher until drained (visible per §3, but one lagging member can stall the firehose — revisit before scale).
 - Member authority (Draft 0.5 §6): the MA-signed registry snapshot is authoritative when configured (`[node] registry` = file path or URL, `ma_key` pinned; monotonic version — rollback and forgery close the node; file path is mtime-reloaded, URL is fetched at start + every 60s and cached to `<data_dir>/registry-cache.json`, so outage fails static). Keys carry optional validity windows (`not_before`/`not_after`); rotation = `registry add-key` then `revoke-key`.
 - `<data_dir>/members.toml` (name, pubkey, class, `previous` keys, mtime-reloaded) is a dev/local fallback used only when no registry is configured; empty directory without a registry is open bootstrap only when `dev_bootstrap = true` (RFC §6: explicit dev flag). Receivers drop content-bearing responses from enrichment-class senders (metadata-only, §6).
-- MA tooling: `frxd registry init|add|add-key|revoke-key|remove|list|set-relays|show|serve` (signed `registry.json` + `ma-key.hex` in `--dir`); `frxd init --id/--registry/--ma-key`; `frxd key show|rotate`; `member add --previous <old>` for the fallback path. A node with no `[node] relays` discovers them from the registry snapshot (`doc.relays`).
+- MA tooling: `frxd registry init|add|add-key|revoke-key|remove|list|applications|approve|invite|set-relays|show|serve` (signed `registry.json` + `ma-key.hex` in `--dir`); `frxd init --id/--registry/--ma-key`; `frxd key show|rotate`; `member add --previous <old>` for the fallback path. A node with no `[node] relays` discovers them from the registry snapshot (`doc.relays`).
 - Aggregate semantics are our implementation choices from a terse spec: requests are `aggregate` envelopes carrying only `period`; replies carry `sent` (broadcasts that month) / `passed` (responses consumed from that member); granularity floor is enforced as YYYY or YYYY-MM only (finer rejected), yearly rolls up months. Revisit with §10 sufficiency review.
 
 ## Known gaps (Phase 2/3, intentional — don't fake them)
@@ -50,6 +50,6 @@
 - Roles are not exclusive: a single node may issue queries and answer them concurrently (I5, §3 "any member"). Implement querier/responder as independent enable flags — never an exclusive mode enum or fixed deployment role.
 - Matching floor: boundary tokenizer (`src/tokenizer.rs` — letter/digit splits so `5555` matches `DLEX5555`, lowercase, ASCII fold, English stopwords+stemmer) → coverage gate (`[match] min_coverage`, default 0.4; 1–2 term queries require all terms) → title boost 2.0 + phrase boost 3.0 + query-time snippets. Schema changes require a fresh index dir (`open_or_create` errors on mismatch).
 - Engine seam: `src/engine.rs` `SearchEngine` trait (`search` → `EngineOutput { hits, total: Option<u64> }`, `doc_count`); `respond()` in `src/node.rs` is the conformance wrapper (budget clamp, truncation from engine total — unknown total forces `truncated = true`). Power users can implement the trait (HTTP adapter or subprocess to an external engine).
-- Onboarding: `frxd --onboarding` runs a wizard consuming a credential block (`id=.. token=.. registry=.. ma_key=..`) issued by the MA's signup endpoint (`registry serve --signup-code --registry-url`; HTML page at `/`, `POST /v1/signup` → one-time invite token, `POST /v1/enroll` binds keys and re-signs). Identity registration stays MA-side; the wizard never creates identities, only binds locally generated keys. Invites live in `<registry dir>/invites.json`. Prompts accept empty input as the default; scripted stdin works for tests.
+- Onboarding: `frxd --onboarding` runs a wizard consuming a credential block (`id=.. token=.. registry=.. ma_key=..`) issued by the MA (`registry serve`; HTML page at `/`, `POST /v1/signup` queues a pending application, `POST /v1/enroll` binds keys and re-signs). Identity registration stays MA-side; the wizard never creates identities, only binds locally generated keys. Applications live in `<registry dir>/applications.json` (mode 600, MA contract data — never in the signed snapshot); `frxd registry approve <id>` promotes one (member stub + invite + credential block), and `frxd registry invite <id>` mints another single-use 24h token — one per node the member runs. Invites live in `<registry dir>/invites.json`. Prompts accept empty input as the default; scripted stdin works for tests.
 - Next matching steps: eval harness with a small golden set (precision@k + false-silence rate), then a dense recall leg (model2vec-rs 0.2.1 exists but needs `default-features = false, features = ["fancy-regex", "local-only"]` for musl/airgapped; verify crate + model licenses before bundling), then an optional cross-encoder reranker. Embeddings are for recall; reranking is the precision tier.
 - Identity/registry (RFC Draft 0.5 §4/§6): MA-hosted FQDN identifiers first (`<label>.frx.<ma-domain>`, no DNS needed by users), signed versioned registry snapshot with the MA key pinned; envelope `from` = identifier, `key` = pubkey; registry outage fails static. Member-hosted identities, MA anchor rollover, and unicast confidentiality are §10 open. Implementation phases: A (signed registry snapshot) and B (identifier + `key` + JCS on the wire) are built and tested. Prioritize frictionless onboarding (users may be department-level and cannot create DNS).

DEPLOY.md

@@ -26,10 +26,10 @@ MA operator — run the signup site:
 
 ```
 frxd registry --dir ./ma init --zone frx.federatedsearch.org
-frxd registry --dir ./ma serve --listen 127.0.0.1:7800 --signup-code <code> --registry-url https://ma.federatedsearch.org/registry.json
+frxd registry --dir ./ma serve --listen 127.0.0.1:7800
 ```
 
-(put Caddy in front for a real domain). The page at `/` accepts a label and the signup code and returns a credential block: `id=... token=... registry=... ma_key=...`.
+(put Caddy in front for a real domain). The page at `/` collects the registration form (short name, organization details) and queues it for MA review — `frxd registry --dir <dir> applications` lists applications and `frxd registry --dir <dir> approve <id> --registry-url <url>` creates the member and prints the credential block to hand over. Each node the member runs needs its own token: `frxd registry --dir <dir> invite <id>` mints another single-use 24h invite for the same identifier. The block is `id=... token=... registry=... ma_key=...`. Organization details (legal name, representative, contacts, payment) are recorded privately by the MA in `<registry dir>/applications.json` — contract data, never in the public signed snapshot.
 
 New member:
 
@@ -169,8 +169,8 @@ gitea admin user generate-access-token -u <you> -t bootstrap --scopes all --conf
 ```
 
 The org is `frx`, the repo `frxd` → clone URL
-`https://git.federatedsearch.org/frx/frxd.git`. Membership stays closed (signup code);
-repo reads are public.
+`https://git.federatedsearch.org/frx/frxd.git`. Membership stays closed (MA-approved
+applications); repo reads are public.
 
 Publishing a release (from the checkout):
 

src/commands.rs

@@ -424,6 +424,79 @@ pub fn registry_list(dir: &Path) -> Result<()> {
     Ok(())
 }
 
+pub fn registry_applications(dir: &Path) -> Result<()> {
+    let applications = registry::load_applications(&registry::applications_path(dir))?;
+    if applications.is_empty() {
+        println!("no applications recorded");
+        return Ok(());
+    }
+    for app in &applications {
+        println!("{} [{}] {} <{}> — {}", app.id, app.class, app.org, app.email, app.status);
+        println!("    representative: {}", app.representative);
+        if !app.address.is_empty() {
+            println!("    address: {}", app.address);
+        }
+        if !app.domain.is_empty() {
+            println!("    domain: {}", app.domain);
+        }
+        if !app.payment.is_empty() {
+            println!("    payment: {}", app.payment);
+        }
+        if !app.privacy_link.is_empty() {
+            println!("    privacy: {}", app.privacy_link);
+        }
+    }
+    Ok(())
+}
+
+/// Approves a pending application: creates the member stub (class from the application),
+/// issues a 24h invite, and prints the credential block to hand to the member.
+pub fn registry_approve(dir: &Path, id: &str, registry_url: Option<&str>) -> Result<()> {
+    let (_, signed) = open_registry(dir)?;
+    if signed.doc.members.iter().any(|member| member.id == id) {
+        return Err(anyhow!("member {id} already listed"));
+    }
+    let application = registry::approve_application(dir, id)?;
+    let class = if application.class == CLASS_ENRICHMENT {
+        CLASS_ENRICHMENT
+    } else {
+        CLASS_SOURCE
+    }
+    .to_string();
+    mutate_registry(dir, |doc| {
+        doc.members.push(RegistryMember {
+            id: id.to_string(),
+            class: class.clone(),
+            keys: Vec::new(),
+            enc_key: None,
+        });
+        Ok(())
+    })?;
+    let invite = registry::create_invite(dir, id, 24 * 3600)?;
+    let (_, signed) = open_registry(dir)?;
+    println!("approved {id} ({class})");
+    print_credential_block(id, &invite.token, registry_url, &signed.doc.ma_key);
+    Ok(())
+}
+
+/// Issues a fresh invite for an existing member — one single-use token per node
+/// the member runs (each node binds its own key at enrollment).
+pub fn registry_invite(dir: &Path, id: &str, registry_url: Option<&str>) -> Result<()> {
+    let (_, signed) = open_registry(dir)?;
+    if !signed.doc.members.iter().any(|member| member.id == id) {
+        return Err(anyhow!("no member named {id}"));
+    }
+    let invite = registry::create_invite(dir, id, 24 * 3600)?;
+    print_credential_block(id, &invite.token, registry_url, &signed.doc.ma_key);
+    Ok(())
+}
+
+fn print_credential_block(id: &str, token: &str, registry_url: Option<&str>, ma_key: &str) {
+    let registry_url = registry_url.unwrap_or("<registry-url>");
+    println!("hand this credential block to the member (single use, valid 24h):");
+    println!("id={id} token={token} registry={registry_url} ma_key={ma_key}");
+}
+
 pub fn registry_set_relays(dir: &Path, relays: &[String]) -> Result<()> {
     mutate_registry(dir, |doc| {
         doc.relays = relays.to_vec();
@@ -446,19 +519,11 @@ pub fn registry_show(dir: &Path) -> Result<()> {
 
 struct RegistryServer {
     dir: PathBuf,
-    signup_code: Option<String>,
-    registry_url: Option<String>,
 }
 
-pub fn registry_router(
-    dir: &Path,
-    signup_code: Option<String>,
-    registry_url: Option<String>,
-) -> Router {
+pub fn registry_router(dir: &Path) -> Router {
     let state = std::sync::Arc::new(RegistryServer {
         dir: dir.to_path_buf(),
-        signup_code,
-        registry_url,
     });
     Router::new()
         .route("/health", get(registry_health))
@@ -469,13 +534,8 @@ pub fn registry_router(
         .with_state(state)
 }
 
-pub async fn registry_serve(
-    dir: &Path,
-    listen: &str,
-    signup_code: Option<String>,
-    registry_url: Option<String>,
-) -> Result<()> {
-    let app = registry_router(dir, signup_code, registry_url);
+pub async fn registry_serve(dir: &Path, listen: &str) -> Result<()> {
+    let app = registry_router(dir);
     let listener = TcpListener::bind(listen).await?;
     println!("registry serving on http://{}", listener.local_addr()?);
     axum::serve(listener, app).await?;
@@ -518,27 +578,32 @@ fn sanitize_label(input: &str) -> String {
 #[derive(Deserialize)]
 struct SignupRequest {
     label: String,
-    code: Option<String>,
+    #[serde(default)]
+    org: String,
+    #[serde(default)]
+    representative: String,
+    #[serde(default)]
+    email: String,
+    #[serde(default)]
+    address: String,
+    #[serde(default)]
+    domain: String,
+    #[serde(default)]
+    class: Option<String>,
+    #[serde(default)]
+    payment: String,
+    #[serde(default)]
+    privacy_link: String,
+    #[serde(default)]
+    attestation: bool,
+    #[serde(default)]
+    privacy_ack: bool,
 }
 
 async fn registry_signup(
     State(server): State<std::sync::Arc<RegistryServer>>,
     Json(request): Json<SignupRequest>,
 ) -> Response {
-    let Some(expected) = &server.signup_code else {
-        return (
-            StatusCode::FORBIDDEN,
-            Json(serde_json::json!({ "error": "signup is not enabled" })),
-        )
-            .into_response();
-    };
-    if request.code.as_deref() != Some(expected.as_str()) {
-        return (
-            StatusCode::FORBIDDEN,
-            Json(serde_json::json!({ "error": "wrong signup code" })),
-        )
-            .into_response();
-    }
     let label = sanitize_label(&request.label);
     if label.is_empty() {
         return (
@@ -547,6 +612,30 @@ async fn registry_signup(
         )
             .into_response();
     }
+    if !request.attestation {
+        return (
+            StatusCode::BAD_REQUEST,
+            Json(serde_json::json!({ "error": "content authorization must be confirmed" })),
+        )
+            .into_response();
+    }
+    if !request.privacy_ack {
+        return (
+            StatusCode::BAD_REQUEST,
+            Json(serde_json::json!({ "error": "the privacy notice must be acknowledged" })),
+        )
+            .into_response();
+    }
+    if request.org.trim().is_empty()
+        || request.representative.trim().is_empty()
+        || request.email.trim().is_empty()
+    {
+        return (
+            StatusCode::BAD_REQUEST,
+            Json(serde_json::json!({ "error": "organization name, representative, and contact email are required" })),
+        )
+            .into_response();
+    }
     let signed = match registry::load_registry(&registry_doc_path(&server.dir)) {
         Ok(signed) => signed,
         Err(error) => {
@@ -566,8 +655,9 @@ async fn registry_signup(
         )
             .into_response();
     }
-    let invite = match registry::create_invite(&server.dir, &id, 24 * 3600) {
-        Ok(invite) => invite,
+    let applications = match registry::load_applications(&registry::applications_path(&server.dir))
+    {
+        Ok(applications) => applications,
         Err(error) => {
             return (
                 StatusCode::INTERNAL_SERVER_ERROR,
@@ -576,34 +666,44 @@ async fn registry_signup(
                 .into_response();
         }
     };
-    if let Err(error) = mutate_registry(&server.dir, |doc| {
-        doc.members.push(RegistryMember {
-            id: id.clone(),
-            class: crate::config::CLASS_SOURCE.to_string(),
-            keys: Vec::new(),
-            enc_key: None,
-        });
-        Ok(())
-    }) {
+    if applications.iter().any(|application| application.id == id) {
+        return (
+            StatusCode::CONFLICT,
+            Json(serde_json::json!({ "error": "an application for this identifier is already on file" })),
+        )
+            .into_response();
+    }
+    let class = if request.class.as_deref() == Some(CLASS_ENRICHMENT) {
+        CLASS_ENRICHMENT
+    } else {
+        CLASS_SOURCE
+    };
+    let application = registry::Application {
+        id: id.clone(),
+        org: request.org.clone(),
+        representative: request.representative.clone(),
+        email: request.email.clone(),
+        address: request.address.clone(),
+        domain: request.domain.clone(),
+        class: class.to_string(),
+        payment: request.payment.clone(),
+        privacy_link: request.privacy_link.clone(),
+        status: "pending".to_string(),
+        submitted_at: now_ts(),
+    };
+    if let Err(error) = registry::record_application(&server.dir, application) {
         return (
             StatusCode::INTERNAL_SERVER_ERROR,
             Json(serde_json::json!({ "error": error.to_string() })),
         )
             .into_response();
     }
-    let registry_url = server.registry_url.clone().unwrap_or_default();
-    let ma_key = signed.doc.ma_key.clone();
     (
-        StatusCode::OK,
+        StatusCode::ACCEPTED,
         Json(serde_json::json!({
+            "status": "pending",
             "id": id,
-            "token": invite.token,
-            "registry": registry_url,
-            "ma_key": ma_key,
-            "credentials": format!(
-                "id={id} token={} registry={registry_url} ma_key={ma_key}",
-                invite.token
-            ),
+            "message": "application received — the membership authority reviews it and issues your credential block"
         })),
     )
         .into_response()
@@ -707,8 +807,10 @@ const REGISTRY_PAGE: &str = r##"<!doctype html>
   .tag { color: #555; margin-top: 0; }
   .card { background: #fff; border: 1px solid #ddd; border-radius: 10px; padding: 1.1rem 1.25rem; }
   code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.92em; }
-  input, button { font: inherit; border: 1px solid #bbb; border-radius: 6px; padding: 0.45rem 0.6rem; }
-  input { width: 100%; margin: 0.2rem 0 0.9rem; }
+  input, select, button { font: inherit; border: 1px solid #bbb; border-radius: 6px; padding: 0.45rem 0.6rem; }
+  input, select { width: 100%; margin: 0.2rem 0 0.9rem; }
+  .check { display: block; font-size: 0.92rem; margin: 0.5rem 0; }
+  .check input { width: auto; margin: 0 0.4rem 0 0; }
   button { background: #174ea6; color: #fff; border: none; cursor: pointer; padding: 0.5rem 1rem; border-radius: 6px; }
   button:hover { background: #0f3d91; }
   #out { display: none; background: #101418; color: #d6f5d6; padding: 0.85rem 1rem;
@@ -729,28 +831,51 @@ small: signed messages, budgets, honest truncation, aggregate courtesy. No annou
 scores on the wire, no in-protocol payment.</p>
 <p>Everything else — matching, ranking, retention, trust — is local.</p>
 
-<h2>1. Register</h2>
+<h2>1. Register with the membership authority</h2>
 <div class="card">
+<p class="muted">This form requests membership from the membership authority (MA). The MA reviews
+your organization details and issues a credential block
+(<code>id=... token=... registry=... ma_key=...</code>); the onboarding wizard in step 4 then
+binds your node's keys to the identifier. The public registry publishes only your identifier,
+class, keys, and the federation's relays. The organization details below are kept privately by
+the MA for the membership contract — never published, never on the wire.</p>
 <form id="f">
-<label>Organization or handle<br>
-<input name="label" required pattern="[A-Za-z0-9 -]+" placeholder="acme-docs"></label><br>
-<label>Signup code (issued by the membership authority)<br>
-<input name="code" type="password" placeholder="signup code"></label><br>
+<label>Short name — this becomes your identifier<br>
+<input name="label" id="label" required pattern="[A-Za-z0-9 -]+" placeholder="keswick-research"></label>
+<p class="muted">identifier: <code id="preview">(type a short name)</code> — no domain or DNS of your own is needed.</p>
+<label>Legal organization name<br>
+<input name="org" required placeholder="Keswick Research LLC"></label>
+<label>Representative (authorized contact person)<br>
+<input name="representative" required placeholder="Jane Keswick"></label>
+<label>Contact email<br>
+<input name="email" type="email" required placeholder="ops@example.org"></label>
+<label>Registered address<br>
+<input name="address" placeholder="street, city, country"></label>
+<label>Organization domain (optional)<br>
+<input name="domain" placeholder="example.org"></label>
+<label>What you will share<br>
+<select name="member_class">
+<option value="source">Source member — content I own or host</option>
+<option value="enrichment">Enrichment member — derived corpora (metadata-only)</option>
+</select></label>
+<label>Payment details (billing / payout — e.g. IBAN or payment handle)<br>
+<input name="payment" placeholder="kept private; the protocol itself carries no payment"></label>
+<label>Your privacy statement URL (optional)<br>
+<input name="privacy_link" placeholder="https://example.org/privacy"></label>
+<label class="check"><input type="checkbox" name="attestation" required> I will only index content I own or that users supply, and only collections I explicitly mark shared will answer queries.</label>
+<label class="check"><input type="checkbox" name="privacy_ack" required> I acknowledge the privacy notice above.</label>
 <button type="submit">Request membership</button>
 </form>
 <pre id="out"></pre>
-<p class="muted">Your identifier is <code>&lt;label&gt;.frx.federatedsearch.org</code> — no domain or DNS of
-your own is needed. Registration returns a one-time credential block:
-<code>id=... token=... registry=... ma_key=...</code>.</p>
 </div>
 
 <h2>2. Download</h2>
 <div class="card">
 <p>Static Linux x86_64 binaries (musl — no runtime dependencies):</p>
-<pre class="cmd">curl -LO https://git.federatedsearch.org/frx/frxd/releases/download/v0.1.0/frxd-linux-amd64
-curl -LO https://git.federatedsearch.org/frx/frxd/releases/download/v0.1.0/frxd-linux-amd64.sha256
-curl -LO https://git.federatedsearch.org/frx/frxd/releases/download/v0.1.0/frx-linux-amd64
-curl -LO https://git.federatedsearch.org/frx/frxd/releases/download/v0.1.0/frx-linux-amd64.sha256</pre>
+<pre class="cmd">curl -LO https://git.federatedsearch.org/frx/frxd/releases/download/v0.1.3/frxd-linux-amd64
+curl -LO https://git.federatedsearch.org/frx/frxd/releases/download/v0.1.3/frxd-linux-amd64.sha256
+curl -LO https://git.federatedsearch.org/frx/frxd/releases/download/v0.1.3/frx-linux-amd64
+curl -LO https://git.federatedsearch.org/frx/frxd/releases/download/v0.1.3/frx-linux-amd64.sha256</pre>
 <p class="muted">All releases: <a href="https://git.federatedsearch.org/frx/frxd/releases">git.federatedsearch.org/frx/frxd/releases</a>.
 Source and spec (<code>rfc.txt</code>): <a href="https://git.federatedsearch.org/frx/frxd">git.federatedsearch.org/frx/frxd</a>.</p>
 </div>
@@ -787,25 +912,51 @@ frxd serve</pre>
 
 <script>
 const out = document.getElementById("out");
-document.getElementById("f").onsubmit = async (e) => {
+const f = document.getElementById("f");
+let zone = "frx.federatedsearch.org";
+function sanitizeLabel(v) {
+  let label = "", lastDash = true;
+  for (const c of v.toLowerCase()) {
+    if (/[a-z0-9]/.test(c)) { label += c; lastDash = false; }
+    else if (!lastDash && (/\s/.test(c) || c === "-" || c === "_" || c === ".")) { label += "-"; lastDash = true; }
+    if (label.length >= 32) break;
+  }
+  return label.replace(/^-+|-+$/g, "").slice(0, 32);
+}
+const preview = document.getElementById("preview");
+const updatePreview = () => {
+  const label = sanitizeLabel(f.label.value);
+  preview.textContent = label ? label + "." + zone : "(type a short name)";
+};
+f.label.addEventListener("input", updatePreview);
+f.onsubmit = async (e) => {
   e.preventDefault();
-  const label = e.target.label.value, code = e.target.code.value;
   const res = await fetch("/v1/signup", {
     method: "POST",
     headers: {"content-type": "application/json"},
-    body: JSON.stringify({label, code})
+    body: JSON.stringify({
+      label: f.label.value,
+      org: f.org.value, representative: f.representative.value, email: f.email.value,
+      address: f.address.value, domain: f.domain.value, class: f.member_class.value,
+      payment: f.payment.value, privacy_link: f.privacy_link.value,
+      attestation: f.attestation.checked, privacy_ack: f.privacy_ack.checked
+    })
   });
   const body = await res.json();
   out.style.display = "block";
-  out.textContent = res.ok
+  out.textContent = body.credentials
     ? "Membership approved.\n\nNext: download frxd (step 2), install it (step 3), then run `frxd --onboarding` and paste this block:\n\n" + body.credentials + "\n"
-    : "Failed: " + (body.error || ("http " + res.status));
+    : res.ok
+      ? "Application received.\n\n" + (body.message || "The membership authority will review it and issue your credential block.")
+      : "Failed: " + (body.error || ("http " + res.status));
 };
 
 (async () => {
   try {
     const res = await fetch("/registry.json");
     const doc = await res.json();
+    zone = doc.zone || zone;
+    updatePreview();
     const ids = doc.members.map((m) => m.id);
     document.getElementById("members").textContent = doc.members.length === 0
       ? "The registry is empty — be the first member."

src/main.rs

@@ -179,6 +179,17 @@ enum RegistryCommand {
         id: String,
     },
     List,
+    Applications,
+    Approve {
+        id: String,
+        #[arg(long)]
+        registry_url: Option<String>,
+    },
+    Invite {
+        id: String,
+        #[arg(long)]
+        registry_url: Option<String>,
+    },
     SetRelays {
         #[arg(required = true)]
         relays: Vec<String>,
@@ -187,10 +198,6 @@ enum RegistryCommand {
     Serve {
         #[arg(long, default_value = "127.0.0.1:7800")]
         listen: String,
-        #[arg(long)]
-        signup_code: Option<String>,
-        #[arg(long)]
-        registry_url: Option<String>,
     },
 }
 
@@ -354,13 +361,16 @@ async fn main() -> Result<()> {
             }
             RegistryCommand::Remove { id } => commands::registry_remove(&dir, &id)?,
             RegistryCommand::List => commands::registry_list(&dir)?,
+            RegistryCommand::Applications => commands::registry_applications(&dir)?,
+            RegistryCommand::Approve { id, registry_url } => {
+                commands::registry_approve(&dir, &id, registry_url.as_deref())?
+            }
+            RegistryCommand::Invite { id, registry_url } => {
+                commands::registry_invite(&dir, &id, registry_url.as_deref())?
+            }
             RegistryCommand::SetRelays { relays } => commands::registry_set_relays(&dir, &relays)?,
             RegistryCommand::Show => commands::registry_show(&dir)?,
-            RegistryCommand::Serve {
-                listen,
-                signup_code,
-                registry_url,
-            } => commands::registry_serve(&dir, &listen, signup_code, registry_url).await?,
+            RegistryCommand::Serve { listen } => commands::registry_serve(&dir, &listen).await?,
         },
         Command::Aggregates {
             from,

src/registry.rs

@@ -108,6 +108,81 @@ pub fn redeem_invite(dir: &Path, id: &str, token: &str) -> Result<()> {
     Ok(())
 }
 
+/// Membership application: MA-private contract data (organization, representative,
+/// contacts, payment). Never part of the public signed registry snapshot.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Application {
+    pub id: String,
+    #[serde(default)]
+    pub org: String,
+    #[serde(default)]
+    pub representative: String,
+    #[serde(default)]
+    pub email: String,
+    #[serde(default)]
+    pub address: String,
+    #[serde(default)]
+    pub domain: String,
+    #[serde(default)]
+    pub class: String,
+    #[serde(default)]
+    pub payment: String,
+    #[serde(default)]
+    pub privacy_link: String,
+    /// "pending" until the MA approves, then "approved".
+    #[serde(default = "default_status")]
+    pub status: String,
+    pub submitted_at: u64,
+}
+
+fn default_status() -> String {
+    "pending".to_string()
+}
+
+pub fn applications_path(dir: &Path) -> PathBuf {
+    dir.join("applications.json")
+}
+
+pub fn load_applications(path: &Path) -> Result<Vec<Application>> {
+    if !path.exists() {
+        return Ok(Vec::new());
+    }
+    let raw = fs::read_to_string(path).context("reading applications")?;
+    serde_json::from_str(&raw).context("parsing applications")
+}
+
+pub fn save_applications(path: &Path, applications: &[Application]) -> Result<()> {
+    fs::write(path, serde_json::to_string_pretty(applications)?)?;
+    crate::config::set_private_permissions(path)?;
+    Ok(())
+}
+
+pub fn record_application(dir: &Path, application: Application) -> Result<()> {
+    let path = applications_path(dir);
+    let mut applications = load_applications(&path)?;
+    applications.push(application);
+    save_applications(&path, &applications)
+}
+
+/// Marks a pending application approved and returns it. Errors if unknown or not pending.
+pub fn approve_application(dir: &Path, id: &str) -> Result<Application> {
+    let path = applications_path(dir);
+    let mut applications = load_applications(&path)?;
+    let Some(application) = applications.iter_mut().find(|app| app.id == id) else {
+        return Err(anyhow!("no application for {id}"));
+    };
+    if application.status != "pending" {
+        return Err(anyhow!(
+            "application for {id} is not pending ({})",
+            application.status
+        ));
+    }
+    application.status = "approved".to_string();
+    let approved = application.clone();
+    save_applications(&path, &applications)?;
+    Ok(approved)
+}
+
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct SignedRegistry {
     #[serde(flatten)]

tests/onboarding.rs

@@ -9,15 +9,11 @@ use frxd::registry::{self};
 use serde_json::Value;
 use tokio::net::TcpListener;
 
-async fn spawn_registry_server(dir: &Path, signup_code: Option<&str>) -> String {
+async fn spawn_registry_server(dir: &Path) -> String {
     let listener = TcpListener::bind("127.0.0.1:0").await.unwrap();
     let addr = listener.local_addr().unwrap();
     let base = format!("http://{addr}");
-    let router = commands::registry_router(
-        dir,
-        signup_code.map(str::to_string),
-        Some(format!("{base}/registry.json")),
-    );
+    let router = commands::registry_router(dir);
     tokio::spawn(async move {
         let _ = axum::serve(listener, router).await;
     });
@@ -30,67 +26,98 @@ fn setup_ma(root: &Path) -> std::path::PathBuf {
     dir
 }
 
+fn full_application(label: &str) -> Value {
+    serde_json::json!({
+        "label": label,
+        "org": format!("{label} Org"),
+        "representative": "R. Ep",
+        "email": "ops@example.org",
+        "attestation": true,
+        "privacy_ack": true
+    })
+}
+
+async fn submit_application(http: &reqwest::Client, base: &str, label: &str) -> Value {
+    let response = http
+        .post(format!("{base}/v1/signup"))
+        .json(&full_application(label))
+        .send()
+        .await
+        .unwrap();
+    assert_eq!(response.status(), reqwest::StatusCode::ACCEPTED);
+    response.json().await.unwrap()
+}
+
+fn invite_token(dir: &Path, id: &str) -> String {
+    registry::load_invites(&dir.join("invites.json"))
+        .unwrap()
+        .into_iter()
+        .rev()
+        .find(|invite| invite.id == id)
+        .unwrap()
+        .token
+}
+
 #[tokio::test(flavor = "multi_thread", worker_threads = 4)]
-async fn signup_issues_invite_and_enroll_binds_key() {
+async fn application_pending_then_approve_then_enroll_binds_key() {
     let root = tempfile::tempdir().unwrap();
     let dir = setup_ma(root.path());
-    let base = spawn_registry_server(&dir, Some("sesame")).await;
+    let base = spawn_registry_server(&dir).await;
     let http = reqwest::Client::builder()
         .timeout(Duration::from_secs(5))
         .build()
         .unwrap();
 
-    let rejected = http
-        .post(format!("{base}/v1/signup"))
-        .json(&serde_json::json!({"label": "alice", "code": "wrong"}))
-        .send()
-        .await
-        .unwrap();
-    assert_eq!(rejected.status(), reqwest::StatusCode::FORBIDDEN);
-
-    let response = http
-        .post(format!("{base}/v1/signup"))
-        .json(&serde_json::json!({"label": "Alice Dev", "code": "sesame"}))
-        .send()
-        .await
-        .unwrap();
-    assert!(response.status().is_success());
-    let body: Value = response.json().await.unwrap();
-    let id = body.get("id").and_then(Value::as_str).unwrap().to_string();
-    assert_eq!(id, "alice-dev.frx.invalid");
-    let token = body
-        .get("token")
-        .and_then(Value::as_str)
-        .unwrap()
-        .to_string();
+    let body = submit_application(&http, &base, "Alice Dev").await;
+    let id = "alice-dev.frx.invalid";
+    assert_eq!(body.get("status").and_then(Value::as_str), Some("pending"));
+    assert_eq!(body.get("id").and_then(Value::as_str), Some(id));
+    assert!(body.get("credentials").is_none());
 
+    // pending: no member entry yet, application on file
     let signed = registry::load_registry(&dir.join("registry.json")).unwrap();
-    assert!(
-        registry::authorized_keys(&signed, now_ts()).is_empty(),
-        "signup must not authorize a key before enrollment"
-    );
+    assert!(signed.doc.members.iter().all(|member| member.id != id));
+    let apps = registry::load_applications(&dir.join("applications.json")).unwrap();
+    assert_eq!(apps.len(), 1);
+    assert_eq!(apps[0].status, "pending");
+
+    // a duplicate application for the same identifier is rejected
+    let dup = http
+        .post(format!("{base}/v1/signup"))
+        .json(&full_application("Alice Dev"))
+        .send()
+        .await
+        .unwrap();
+    assert_eq!(dup.status(), reqwest::StatusCode::CONFLICT);
+
+    // MA approves: member stub + invite; enrollment binds the key
+    commands::registry_approve(&dir, id, None).unwrap();
+    let signed = registry::load_registry(&dir.join("registry.json")).unwrap();
+    assert!(signed.doc.members.iter().any(|member| member.id == id));
+    let apps = registry::load_applications(&dir.join("applications.json")).unwrap();
+    assert_eq!(apps[0].status, "approved");
 
     let key = Keypair::generate();
-    let response = http
+    let enrolled = http
         .post(format!("{base}/v1/enroll"))
         .json(&serde_json::json!({
             "id": id,
-            "token": token,
+            "token": invite_token(&dir, id),
             "pubkey": key.public_hex(),
         }))
         .send()
         .await
         .unwrap();
-    assert!(response.status().is_success());
-
+    assert!(enrolled.status().is_success());
     let signed = registry::load_registry(&dir.join("registry.json")).unwrap();
     assert!(registry::authorized_keys(&signed, now_ts()).contains_key(&key.public_hex()));
 
+    // the token is single-use
     let replayed = http
         .post(format!("{base}/v1/enroll"))
         .json(&serde_json::json!({
             "id": id,
-            "token": token,
+            "token": invite_token(&dir, id),
             "pubkey": Keypair::generate().public_hex(),
         }))
         .send()
@@ -99,22 +126,147 @@ async fn signup_issues_invite_and_enroll_binds_key() {
     assert_eq!(replayed.status(), reqwest::StatusCode::FORBIDDEN);
 }
 
+#[tokio::test(flavor = "multi_thread", worker_threads = 4)]
+async fn signup_stores_private_application_and_class() {
+    let root = tempfile::tempdir().unwrap();
+    let dir = setup_ma(root.path());
+    let base = spawn_registry_server(&dir).await;
+    let http = reqwest::Client::builder()
+        .timeout(Duration::from_secs(5))
+        .build()
+        .unwrap();
+
+    // missing acknowledgements are rejected
+    let missing = http
+        .post(format!("{base}/v1/signup"))
+        .json(&serde_json::json!({
+            "label": "acme", "org": "Acme", "representative": "A", "email": "a@acme.example"
+        }))
+        .send()
+        .await
+        .unwrap();
+    assert_eq!(missing.status(), reqwest::StatusCode::BAD_REQUEST);
+
+    let response = http
+        .post(format!("{base}/v1/signup"))
+        .json(&serde_json::json!({
+            "label": "Keswick Research",
+            "org": "Keswick Research LLC",
+            "representative": "J. Keswick",
+            "email": "ops@keswick.example",
+            "address": "1 Fell Road, Keswick",
+            "domain": "keswick.example",
+            "class": "enrichment",
+            "payment": "IBAN XX00 0000",
+            "privacy_link": "https://keswick.example/privacy",
+            "attestation": true,
+            "privacy_ack": true
+        }))
+        .send()
+        .await
+        .unwrap();
+    assert_eq!(response.status(), reqwest::StatusCode::ACCEPTED);
+    let body: Value = response.json().await.unwrap();
+    assert_eq!(
+        body.get("id").and_then(Value::as_str),
+        Some("keswick-research.frx.invalid")
+    );
+
+    // private application record holds the contract details
+    let apps = registry::load_applications(&dir.join("applications.json")).unwrap();
+    assert_eq!(apps.len(), 1);
+    let app = &apps[0];
+    assert_eq!(app.id, "keswick-research.frx.invalid");
+    assert_eq!(app.org, "Keswick Research LLC");
+    assert_eq!(app.representative, "J. Keswick");
+    assert_eq!(app.email, "ops@keswick.example");
+    assert_eq!(app.payment, "IBAN XX00 0000");
+    assert_eq!(app.privacy_link, "https://keswick.example/privacy");
+    assert_eq!(app.class, "enrichment");
+    assert_eq!(app.status, "pending");
+
+    // approval creates the member entry with the declared class
+    commands::registry_approve(&dir, "keswick-research.frx.invalid", None).unwrap();
+    let signed = registry::load_registry(&dir.join("registry.json")).unwrap();
+    let member = signed
+        .doc
+        .members
+        .iter()
+        .find(|m| m.id == "keswick-research.frx.invalid")
+        .unwrap();
+    assert_eq!(member.class, frxd::config::CLASS_ENRICHMENT);
+
+    // public registry stays minimal: no org data in the signed snapshot
+    let raw = std::fs::read_to_string(dir.join("registry.json")).unwrap();
+    assert!(!raw.contains("Keswick Research LLC"));
+    assert!(!raw.contains("ops@keswick.example"));
+}
+
+#[tokio::test(flavor = "multi_thread", worker_threads = 4)]
+async fn invite_reissues_token_per_node() {
+    let root = tempfile::tempdir().unwrap();
+    let dir = setup_ma(root.path());
+    let base = spawn_registry_server(&dir).await;
+    let http = reqwest::Client::builder()
+        .timeout(Duration::from_secs(5))
+        .build()
+        .unwrap();
+    submit_application(&http, &base, "Multi Node").await;
+    let id = "multi-node.frx.invalid";
+    commands::registry_approve(&dir, id, None).unwrap();
+
+    let enroll = |token: String, pubkey: String| {
+        let http = http.clone();
+        let base = base.clone();
+        let id = id.to_string();
+        async move {
+            http.post(format!("{base}/v1/enroll"))
+                .json(&serde_json::json!({
+                    "id": id, "token": token, "pubkey": pubkey,
+                }))
+                .send()
+                .await
+                .unwrap()
+                .status()
+        }
+    };
+
+    // node 1: the invite from approval
+    let key1 = Keypair::generate();
+    let token1 = invite_token(&dir, id);
+    assert!(enroll(token1.clone(), key1.public_hex()).await.is_success());
+
+    // node 2: a fresh token from `registry invite`
+    commands::registry_invite(&dir, id, None).unwrap();
+    let key2 = Keypair::generate();
+    let token2 = invite_token(&dir, id);
+    assert_ne!(token1, token2);
+    assert!(enroll(token2, key2.public_hex()).await.is_success());
+
+    let signed = registry::load_registry(&dir.join("registry.json")).unwrap();
+    let authorized = registry::authorized_keys(&signed, now_ts());
+    assert!(authorized.contains_key(&key1.public_hex()));
+    assert!(authorized.contains_key(&key2.public_hex()));
+
+    // an invite for an unknown member fails
+    assert!(commands::registry_invite(&dir, "ghost.frx.invalid", None).is_err());
+}
+
 #[tokio::test(flavor = "multi_thread", worker_threads = 4)]
 async fn wizard_enrolls_and_writes_config() {
     let root = tempfile::tempdir().unwrap();
     let dir = setup_ma(root.path());
-    let base = spawn_registry_server(&dir, Some("sesame")).await;
+    let base = spawn_registry_server(&dir).await;
     let http = reqwest::Client::new();
-    let body: Value = http
-        .post(format!("{base}/v1/signup"))
-        .json(&serde_json::json!({"label": "Wizard Test", "code": "sesame"}))
-        .send()
-        .await
-        .unwrap()
-        .json()
-        .await
-        .unwrap();
-    let credentials = body.get("credentials").and_then(Value::as_str).unwrap();
+    submit_application(&http, &base, "Wizard Test").await;
+    let id = "wizard-test.frx.invalid";
+    commands::registry_approve(&dir, id, None).unwrap();
+    let signed = registry::load_registry(&dir.join("registry.json")).unwrap();
+    let credentials = format!(
+        "id={id} token={} registry={base}/registry.json ma_key={}",
+        invite_token(&dir, id),
+        signed.doc.ma_key
+    );
 
     let config_path = root.path().join("wizard.toml");
     let input = format!("{}\n{credentials}\n\n\n\nn\n", config_path.display());
@@ -128,7 +280,7 @@ async fn wizard_enrolls_and_writes_config() {
     assert!(text.contains("enrolled"), "{text}");
 
     let config = Config::load(&config_path).unwrap();
-    assert_eq!(config.node.id.as_deref(), Some("wizard-test.frx.invalid"));
+    assert_eq!(config.node.id.as_deref(), Some(id));
     assert_eq!(
         config.node.registry.as_deref(),
         Some(format!("{base}/registry.json").as_str())