extra-forges: fully dashboard-provisioned, no host config

Per mara's feedback on PR #2407 ("better: you can also provide url in
dashboard, same as with matrix, no host config"), drops
services.hyperhive.extraForges and the admin-API mint/revoke flow
entirely. The operator now creates a token on the external forge
themselves and pastes a label + base URL + access token into the
dashboard's FORGES tab, the same shape as the GitHub PAT flow plus the
base-URL field from the matrix extra-account flow. hive-c0re only ever
writes/deletes two local files per account (forge-<label>-token,
forge-<label>.json sidecar for the URL) via hive-priv — no remote
account creation, no admin token, no revoke-on-the-remote-side, no nix
config to enumerate.

- nix/host-modules/hive-forge/default.nix: removed the extraForges
  option, its label-format assertion, and the HYPERHIVE_EXTRA_FORGES
  env forwarding.
- hive-c0re/src/forge/extra.rs: deleted (REST admin-API provisioning,
  no longer needed).
- hive-c0re/src/dashboard/extra_forges.rs: GET /api/extra-forges?
  agent= lists an agent's stored forges by scanning its state dir
  (mirrors matrix_accounts.rs's filename-scan listing), POST
  /api/extra-forge-account (agent/label/base_url/token/
  action=add|remove) stores or removes an account.
- hive-sh4re/priv_proto.rs + hive-priv/main.rs: new
  WriteAgentExtraForgeAccount/DeleteAgentExtraForgeAccount priv
  requests (adds base_url, writes/deletes a JSON sidecar alongside the
  token).
- hive-c0re/src/priv_client.rs: matching wrapper functions.
- frontend/packages/dashboard/src/credentials.{html,js}: FORGES tab is
  a per-agent list + add-account paste form (label/base_url/token), no
  grant/revoke-from-catalog UI.
- docs/web-ui/dashboard.md: FORGES tab section rewritten.

Supersedes the design in PR #2407 (already approved+green on the old
admin-API model) — opening as a fresh PR against the same issues
rather than force-pushing over the approved one.

docs/web-ui/dashboard.md

@@ -283,7 +283,7 @@ on the H0M3 hub, same minimal chrome as `/logs.html` (a `← home` back-link
 than `/core.html`'s plain title. Its own esbuild bundle
 (`credentials.js`); no SSE — it reads `/api/state` once for the (shared)
 agent picker and otherwise works off purpose-built endpoints per tab.
-Two sub-tabs:
+Three sub-tabs:
 
 ### MATRIX tab
 
@@ -354,6 +354,32 @@ regardless of outcome. The account list reflects what is *provisioned*
 (an account with a stored token), so a config-declared-but-unprovisioned
 account appears only once it has been provisioned through the form.
 
+### FORGES tab
+
+Store a **label + base URL + access token** for an external Forgejo/Gitea/
+Codeberg-compatible forge, per agent. Entirely dashboard-provisioned —
+there is no host-side nix config for this (no `services.hyperhive.
+extraForges` option). The operator creates the token on the external forge
+themselves (however that forge lets them — PAT UI, a teammate with admin,
+whatever) and pastes label/URL/token into the form; hive-c0re never talks
+to the external forge's API and never creates an account there.
+
+The selected agent's stored forges come from `GET /api/extra-forges?
+agent=<name>` → `{ forges: [{ label, base_url }] }`, derived by scanning
+the agent's state dir for `forge-<label>-token` files (mirrors the MATRIX
+tab's filename-scan listing) with `base_url` backfilled from a sibling
+`forge-<label>.json` sidecar. Submitting the add form posts `POST /api/
+extra-forge-account` (form-encoded `agent, label, base_url, token,
+action=add`) → `200 { ok: true }`, which writes both files through the
+same privileged write path as the other tabs. Each row's `remove` button
+opens a themed confirm dialog, then posts the same endpoint with
+`action=remove`, deleting both local files — nothing changes on the
+remote forge. The token is never echoed back in either direction.
+
+A per-forge `hive-forge --forge <label>` CLI selector (to make `hive-forge`
+target one of these accounts instead of the internal forge) is a
+deliberate non-goal of this tab — tracked separately.
+
 ## P3RM1SS10NS tab
 
 Per-agent permission configuration. Two sections, each rendered as a

frontend/packages/dashboard/src/credentials.html

@@ -26,6 +26,10 @@
          aria-controls="cred-pane-github" data-tab="github">
         <span class="cred-tab-label">GITHUB</span>
       </a>
+      <a class="hive-tab" id="cred-tab-forges" href="#forges" role="tab"
+         aria-controls="cred-pane-forges" data-tab="forges">
+        <span class="cred-tab-label">FORGES</span>
+      </a>
     </nav>
   </header>
 
@@ -125,6 +129,38 @@
       </form>
     </section>
 
+    <!-- FORGES tab: external Forgejo/Gitea/Codeberg-compatible forges.
+         Entirely dashboard-provisioned, no host-side nix config &mdash; same
+         shape as GITHUB plus a base-URL field (like MATRIX's homeserver).
+         The operator creates a token on the external forge themselves
+         (however that forge lets them) and pastes label + URL + token
+         below. No remote account minting/revoking &mdash; purely local. -->
+    <section class="cred-pane" id="cred-pane-forges" data-tab-pane="forges"
+             role="tabpanel" aria-labelledby="cred-tab-forges" hidden>
+      <p class="meta">store a <strong>label + base URL + access token</strong> for an external Forgejo/Gitea/Codeberg-compatible forge, per agent. no account is created on the remote forge &mdash; create the token there yourself first. the token is never displayed back on this page.</p>
+
+      <h3>◇ provisioned forges</h3>
+      <div id="ef-list" class="ef-list"><p class="meta">select an agent to see its forge accounts.</p></div>
+
+      <h3>◇ add forge account</h3>
+      <form id="ef-form" class="ma-form" autocomplete="off">
+        <label class="ma-field">
+          <span>label</span>
+          <input type="text" name="label" placeholder="e.g. codeberg" required>
+        </label>
+        <label class="ma-field">
+          <span>base url</span>
+          <input type="text" name="base_url" placeholder="https://codeberg.org" required>
+        </label>
+        <label class="ma-field">
+          <span>access token</span>
+          <input type="password" name="token" autocomplete="off" required>
+        </label>
+        <button type="submit" class="btn btn-spawn">store account</button>
+        <p id="ef-result" class="ma-result" aria-live="polite"></p>
+      </form>
+    </section>
+
   </main>
 
   <script type="module" src="/static/credentials.js" defer></script>

frontend/packages/dashboard/src/credentials.js

@@ -10,10 +10,18 @@
 //            {ok:true}; same error_response shape as matrix-account-login).
 //            No account name / homeserver / login mode, and no
 //            live/heartbeat concept for a static PAT — just present/absent.
+//   FORGES — external forge accounts, entirely dashboard-provisioned (no
+//            host-side config): GET /api/extra-forges?agent= lists the
+//            agent's stored {label, base_url} pairs, POST
+//            /api/extra-forge-account (form agent/label/base_url/token/
+//            action=add|remove) stores or removes one. No remote account
+//            creation — the operator makes the token on the external forge
+//            themselves and pastes it in, same trust model as GITHUB.
 // Per-tab detail comments live next to their section below.
 
 import { $, el, esc, fmtAgeSecs, renderServerWarnings } from './common.js';
 import { createTabStrip } from '@hive/shared/tabs.js';
+import { themedConfirm, themedToast } from './modal.js';
 
 let agents = [];
 // agent name → container running (bool), from /api/state. Cross-referenced by
@@ -342,11 +350,149 @@ async function submitGithub(e) {
   }
 }
 
+// ─── FORGES tab ─────────────────────────────────────────────────────────
+// Entirely dashboard-provisioned, no host-side nix config: per-agent list
+// (GET /api/extra-forges?agent=, derived from the agent's own
+// forge-<label>-token files) + an add form (POST /api/extra-forge-account,
+// form label/base_url/token, action=add) and a remove button per row
+// (same POST, action=remove). No remote account creation — purely local
+// bookkeeping for a token the operator already created on the external
+// forge themselves.
+
+async function loadForgeAccounts(agent) {
+  const list = $('ef-list');
+  if (!agent) {
+    list.replaceChildren(el('p', { class: 'meta' }, 'select an agent to see its forge accounts.'));
+    return;
+  }
+  list.replaceChildren(el('p', { class: 'meta' }, 'loading…'));
+  let forges;
+  try {
+    const resp = await fetch('/api/extra-forges?agent=' + encodeURIComponent(agent));
+    if (!resp.ok) throw new Error('HTTP ' + resp.status);
+    forges = (await resp.json()).forges || [];
+  } catch (err) {
+    list.replaceChildren(el('p', { class: 'err' },
+      'could not load forge accounts: ' + esc(String(err)) + ' (the backend endpoint may not be deployed yet).'));
+    return;
+  }
+
+  list.replaceChildren();
+  if (!forges.length) {
+    list.replaceChildren(el('p', { class: 'meta' }, 'no forge accounts stored for this agent.'));
+    return;
+  }
+  const ul = el('ul', { class: 'ma-accounts' });
+  for (const forge of forges) {
+    const btn = el('button', { class: 'btn', type: 'button' }, 'remove');
+    btn.addEventListener('click', () => onForgeRemoveClick(agent, forge, btn));
+    ul.append(el('li', { class: 'ma-account' },
+      el('span', { class: 'ma-dot ok' }),
+      el('span', { class: 'ma-name' }, forge.label),
+      el('span', { class: 'ma-hs' }, forge.base_url || '—'),
+      el('span', { class: 'ma-status ok' }, 'token stored ✓'),
+      btn,
+    ));
+  }
+  list.append(ul);
+}
+
+async function onForgeRemoveClick(agent, forge, btn) {
+  const r = await themedConfirm({
+    message: `remove ${agent}'s stored token for ${forge.label}? this only deletes the local copy — nothing changes on the remote forge.`,
+    danger: true,
+    confirmLabel: '⊘ remove',
+  });
+  if (!r) return;
+
+  btn.disabled = true;
+  const orig = btn.textContent;
+  btn.textContent = 'removing…';
+  try {
+    const resp = await fetch('/api/extra-forge-account', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
+      body: new URLSearchParams({ agent, label: forge.label, action: 'remove' }),
+    });
+    if (resp.ok) {
+      loadForgeAccounts(agent);
+      return;
+    }
+    const msg = await readErrorBody(resp);
+    btn.textContent = orig;
+    btn.disabled = false;
+    themedToast('✗ ' + (msg || ('remove failed (HTTP ' + resp.status + ')')), { type: 'error' });
+  } catch (err) {
+    btn.textContent = orig;
+    btn.disabled = false;
+    themedToast('✗ request failed: ' + String(err), { type: 'error' });
+  }
+}
+
+async function submitForgeAccount(e) {
+  e.preventDefault();
+  const formEl = e.target;
+  const out = $('ef-result');
+  out.className = 'ma-result';
+  out.textContent = '';
+
+  const agent = $('ma-agent').value;
+  if (!agent) {
+    out.className = 'ma-result err';
+    out.textContent = 'select an agent first.';
+    return;
+  }
+
+  const fd = new FormData(formEl);
+  fd.set('agent', agent);
+  fd.set('action', 'add');
+
+  const btn = formEl.querySelector('button[type="submit"]');
+  const orig = btn.textContent;
+  btn.disabled = true;
+  btn.textContent = 'storing…';
+
+  try {
+    const resp = await fetch('/api/extra-forge-account', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
+      body: new URLSearchParams(fd),
+    });
+
+    if (resp.ok) {
+      let body = {};
+      try { body = await resp.json(); } catch { /* tolerate odd 2xx body */ }
+      if (body.ok) {
+        out.className = 'ma-result ok';
+        out.textContent = '✓ forge account stored.';
+        clearSecrets(formEl);
+        loadForgeAccounts(agent);
+      } else {
+        out.className = 'ma-result err';
+        out.textContent = '✗ store failed (unexpected response).';
+        clearSecrets(formEl);
+      }
+    } else {
+      const msg = await readErrorBody(resp);
+      out.className = 'ma-result err';
+      out.textContent = '✗ ' + (msg || ('store failed (HTTP ' + resp.status + ')'));
+      clearSecrets(formEl);
+    }
+  } catch (err) {
+    out.className = 'ma-result err';
+    out.textContent = '✗ request failed: ' + String(err) + ' (the backend endpoint may not be deployed yet).';
+  } finally {
+    btn.disabled = false;
+    btn.textContent = orig;
+  }
+}
+
 // ─── init ─────────────────────────────────────────────────────────────
 
 async function onAgentChange(agent) {
   loadAccounts(agent);
   loadGithubStatus(agent);
+  loadForgeAccounts(agent);
 }
 
 async function init() {
@@ -358,6 +504,7 @@ async function init() {
   toggleModeFields();
   $('ma-form').addEventListener('submit', submitLogin);
   $('gh-form').addEventListener('submit', submitGithub);
+  $('ef-form').addEventListener('submit', submitForgeAccount);
 
   createTabStrip(document.getElementById('cred-tabbar'), {
     defaultId: 'matrix',

hive-c0re/src/dashboard/extra_forges.rs

@@ -0,0 +1,205 @@
+//! Dashboard-driven external (non-internal) Forgejo/Gitea/Codeberg-compatible
+//! forge accounts, per agent. Entirely dashboard-provisioned — there is no
+//! host-side nix config for these (see `nix/modules/hive-forge.nix`'s
+//! removed `extraForges` option). The operator manually creates a token on
+//! the external forge themselves (however that forge lets them: PAT UI, a
+//! teammate with admin, whatever) and pastes a label + base URL + token into
+//! the dashboard's FORGES tab, same shape as the GitHub PAT flow
+//! (`post_github_account`) plus the homeserver field from the matrix extra-
+//! account flow (`post_matrix_account_login`).
+//!
+//! No remote account minting, no admin API, no revoke-on-the-remote-side —
+//! this module only ever touches the *local* agent state dir. hive-c0re
+//! persists the token to `<state>/forge-<label>-token` (0600) and the base
+//! URL to a `<state>/forge-<label>.json` sidecar (not secret, but kept next
+//! to the token so both survive together) via hive-priv. Listing derives the
+//! configured set from those files, mirroring `matrix_accounts.rs`'s
+//! filename-scan approach — there is no separate "catalog" now that there's
+//! no nix config to enumerate.
+
+use std::path::Path;
+
+use axum::extract::{Form, Query};
+use axum::response::{IntoResponse, Response};
+use serde::{Deserialize, Serialize};
+
+use super::error_response;
+use crate::coordinator::Coordinator;
+
+/// Plain-identifier check matching hive-priv's `validate_name_chars`
+/// (lowercase ascii + digits + hyphens) — same guard used by
+/// `matrix_accounts::is_plain_ident`. Duplicated locally (private, not
+/// worth a shared-util churn for one predicate) rather than exported from
+/// that module, since both call sites are dashboard-only.
+fn is_plain_ident(s: &str) -> bool {
+    !s.is_empty()
+        && s.chars()
+            .all(|c| c.is_ascii_lowercase() || c.is_ascii_digit() || c == '-')
+}
+
+#[derive(Deserialize)]
+struct ForgeSidecar {
+    base_url: String,
+}
+
+/// Read the base URL an agent stashed for `label` from its
+/// `forge-<label>.json` sidecar. `None` if the sidecar is missing or
+/// unparseable (e.g. a token file left over from a partial/older write).
+fn read_base_url(dir: &Path, label: &str) -> Option<String> {
+    let s = std::fs::read_to_string(dir.join(format!("forge-{label}.json"))).ok()?;
+    serde_json::from_str::<ForgeSidecar>(&s)
+        .ok()
+        .map(|s| s.base_url)
+}
+
+#[derive(Serialize)]
+struct ExtraForgeAccount {
+    label: String,
+    base_url: Option<String>,
+}
+
+#[derive(Serialize)]
+struct ExtraForgesResponse {
+    forges: Vec<ExtraForgeAccount>,
+}
+
+#[derive(Deserialize)]
+pub(super) struct ExtraForgesQuery {
+    agent: String,
+}
+
+/// `GET /api/extra-forges?agent=<name>` — list the external forge accounts
+/// currently provisioned for `agent`, derived from every `forge-<label>-
+/// token` file in its state dir (mirrors `matrix_accounts.rs`'s filename-scan
+/// listing). `base_url` is backfilled from the matching `forge-<label>.json`
+/// sidecar when present. Never returns a token.
+pub(super) async fn get_extra_forges(Query(q): Query<ExtraForgesQuery>) -> Response {
+    let agent = q.agent.trim();
+    if !is_plain_ident(agent) {
+        return error_response(&format!("extra-forges: invalid agent {agent:?}"));
+    }
+    let dir = Coordinator::agent_notes_dir(agent);
+    let mut forges = Vec::new();
+    match std::fs::read_dir(&dir) {
+        Ok(entries) => {
+            for entry in entries.flatten() {
+                if !entry.file_type().is_ok_and(|ft| ft.is_file()) {
+                    continue;
+                }
+                let fname = entry.file_name();
+                let Some(fname) = fname.to_str() else {
+                    continue;
+                };
+                // `forge-token` (no suffix) is the mandatory internal forge —
+                // not one of these dashboard-provisioned extra accounts.
+                let Some(label) = fname
+                    .strip_prefix("forge-")
+                    .and_then(|s| s.strip_suffix("-token"))
+                else {
+                    continue;
+                };
+                if label.is_empty() {
+                    continue;
+                }
+                forges.push(ExtraForgeAccount {
+                    base_url: read_base_url(&dir, label),
+                    label: label.to_owned(),
+                });
+            }
+        }
+        Err(e) if e.kind() == std::io::ErrorKind::NotFound => {}
+        Err(e) => {
+            return error_response(&format!("extra-forges: read {}: {e}", dir.display()));
+        }
+    }
+    forges.sort_by(|a, b| a.label.cmp(&b.label));
+    axum::Json(ExtraForgesResponse { forges }).into_response()
+}
+
+/// Form body for `POST /api/extra-forge-account` (urlencoded, the
+/// dashboard's mutation convention). `action` is `"add"` (needs `base_url` +
+/// `token`) or `"remove"`.
+#[derive(Deserialize)]
+pub(super) struct ExtraForgeAccountForm {
+    agent: String,
+    label: String,
+    action: String,
+    base_url: Option<String>,
+    token: Option<String>,
+}
+
+#[derive(Serialize)]
+struct ExtraForgeAccountResult {
+    ok: bool,
+}
+
+/// `POST /api/extra-forge-account` — add persists the operator-pasted
+/// label/base-URL/token to the agent's state dir via hive-priv; remove
+/// deletes both files. Purely local — no remote account creation or
+/// revocation, there is no admin access assumed on the external forge.
+/// Operator-authenticated (dashboard). Never echoes the token back.
+pub(super) async fn post_extra_forge_account(Form(f): Form<ExtraForgeAccountForm>) -> Response {
+    let agent = f.agent.trim();
+    let label = f.label.trim();
+    if !is_plain_ident(agent) {
+        return error_response(&format!("extra-forge-account: invalid agent {agent:?}"));
+    }
+    if !is_plain_ident(label) {
+        return error_response(&format!("extra-forge-account: invalid label {label:?}"));
+    }
+
+    match f.action.as_str() {
+        "add" => {
+            let base_url = f.base_url.as_deref().unwrap_or_default().trim();
+            let base_url = base_url.trim_end_matches('/');
+            if !(base_url.starts_with("http://") || base_url.starts_with("https://")) {
+                return error_response(&format!(
+                    "extra-forge-account: base_url must be an http(s) URL, got {base_url:?}"
+                ));
+            }
+            let Some(token) = f.token.as_deref().filter(|t| !t.is_empty()) else {
+                return error_response("extra-forge-account: token is required");
+            };
+            if let Err(e) =
+                crate::priv_client::write_agent_extra_forge_account(agent, label, base_url, token)
+                    .await
+            {
+                return error_response(&format!(
+                    "extra-forge-account: write account failed: {e:#}"
+                ));
+            }
+            tracing::info!(%agent, %label, "extra-forge-account: provisioned");
+        }
+        "remove" => {
+            if let Err(e) = crate::priv_client::delete_agent_extra_forge_account(agent, label).await
+            {
+                return error_response(&format!(
+                    "extra-forge-account: delete account failed: {e:#}"
+                ));
+            }
+            tracing::info!(%agent, %label, "extra-forge-account: removed");
+        }
+        other => {
+            return error_response(&format!(
+                "extra-forge-account: unknown action {other:?} (want add|remove)"
+            ));
+        }
+    }
+    axum::Json(ExtraForgeAccountResult { ok: true }).into_response()
+}
+
+#[cfg(test)]
+mod tests {
+    use super::is_plain_ident;
+
+    #[test]
+    fn is_plain_ident_matches_validate_name_chars() {
+        assert!(is_plain_ident("codeberg"));
+        assert!(is_plain_ident("my-forge-1"));
+        assert!(!is_plain_ident(""));
+        assert!(!is_plain_ident("MyForge"));
+        assert!(!is_plain_ident("my_forge"));
+        assert!(!is_plain_ident("../escape"));
+        assert!(!is_plain_ident("a/b"));
+    }
+}

hive-c0re/src/dashboard/mod.rs

@@ -18,6 +18,7 @@ use crate::lifecycle;
 
 mod approvals;
 mod build_logs;
+mod extra_forges;
 mod infra_containers;
 mod journal;
 mod lifecycle_ops;
@@ -88,6 +89,11 @@ pub async fn serve(
             "/api/matrix-accounts",
             get(matrix_accounts::get_matrix_accounts),
         )
+        .route("/api/extra-forges", get(extra_forges::get_extra_forges))
+        .route(
+            "/api/extra-forge-account",
+            post(extra_forges::post_extra_forge_account),
+        )
         .route("/api/reminders", get(reminders::api_reminders))
         .route("/api/operator-inbox", get(misc_api::api_operator_inbox))
         .route("/api/stats-hive", get(misc_api::api_stats_hive))

hive-c0re/src/forge/users.rs

@@ -31,7 +31,10 @@ use crate::paths::FORGE_CORE_TOKEN as CORE_TOKEN_PATH;
 // build.
 /// Per-agent token scopes (broad-but-not-admin). See
 /// `docs/forge.md::Token scopes` for the per-scope rationale.
-const TOKEN_SCOPES: &str = "read:user,write:user,read:notification,write:notification,write:repository,write:issue,write:organization,write:misc";
+/// `pub(super)` — also reused by `extra.rs`'s external-forge
+/// provisioning so a granted agent gets the same scope set on an
+/// extra forge as on the internal one.
+pub(super) const TOKEN_SCOPES: &str = "read:user,write:user,read:notification,write:notification,write:repository,write:issue,write:organization,write:misc";
 
 /// Bootstrap `core` token scopes — adds `read:admin,write:admin` on
 /// top of `TOKEN_SCOPES` so the host daemon can drive

hive-c0re/src/priv_client.rs

@@ -300,6 +300,37 @@ pub async fn write_agent_github_token(agent_name: &str, token: &str) -> Result<(
     .await?)
 }
 
+/// Write a per-agent account for a dashboard-declared external forge —
+/// label + base URL + token — to `<state>/forge-<label>-token` +
+/// `<state>/forge-<label>.json` via hive-priv. Entirely dashboard-
+/// provisioned, no host-side nix config; `label` is validated root-side as
+/// a plain identifier before it reaches the filename.
+pub async fn write_agent_extra_forge_account(
+    agent_name: &str,
+    label: &str,
+    base_url: &str,
+    token: &str,
+) -> Result<()> {
+    ok(call(&PrivRequest::WriteAgentExtraForgeAccount {
+        agent_name: agent_name.to_owned(),
+        label: label.to_owned(),
+        base_url: base_url.to_owned(),
+        token: token.to_owned(),
+    })
+    .await?)
+}
+
+/// Remove a previously-added extra-forge account — the counterpart of
+/// [`write_agent_extra_forge_account`]. Idempotent: missing files are not
+/// an error.
+pub async fn delete_agent_extra_forge_account(agent_name: &str, label: &str) -> Result<()> {
+    ok(call(&PrivRequest::DeleteAgentExtraForgeAccount {
+        agent_name: agent_name.to_owned(),
+        label: label.to_owned(),
+    })
+    .await?)
+}
+
 /// Restart `hive-matrix-daemon.service` inside an agent container via
 /// `systemctl --machine=h-<agent_name> restart hive-matrix-daemon.service`.
 /// Non-fatal: callers should handle errors gracefully — if the container is

hive-priv/src/main.rs

@@ -297,6 +297,36 @@ async fn exec(req: PrivRequest, writer: &mut OwnedWriteHalf) -> Result<(String,
             write_agent_state_file(agent_name, "github-token", &format!("{token}\n"))
         }
 
+        PrivRequest::WriteAgentExtraForgeAccount {
+            ref agent_name,
+            ref label,
+            ref base_url,
+            ref token,
+        } => {
+            validate_agent_name(agent_name)?;
+            validate_name_chars(label)?;
+            let res = write_agent_state_file(
+                agent_name,
+                &format!("forge-{label}-token"),
+                &format!("{token}\n"),
+            )?;
+            // Sidecar carries the base URL — there's no host-side nix config
+            // for extra forges, so this is the only place it's persisted.
+            let meta = serde_json::json!({ "base_url": base_url }).to_string();
+            write_agent_state_file(agent_name, &format!("forge-{label}.json"), &meta)?;
+            Ok(res)
+        }
+
+        PrivRequest::DeleteAgentExtraForgeAccount {
+            ref agent_name,
+            ref label,
+        } => {
+            validate_agent_name(agent_name)?;
+            validate_name_chars(label)?;
+            delete_agent_state_file(agent_name, &format!("forge-{label}-token"))?;
+            delete_agent_state_file(agent_name, &format!("forge-{label}.json"))
+        }
+
         PrivRequest::RestartMatrixDaemon { ref agent_name } => {
             restart_matrix_daemon(agent_name).await
         }
@@ -636,6 +666,30 @@ fn write_agent_state_file(
     Ok((String::new(), String::new()))
 }
 
+/// Remove `AGENT_STATE_ROOT/<agent_name>/state/<filename>` if present.
+/// Idempotent revoke counterpart to [`write_agent_state_file`] — a
+/// missing file is success, not an error. `filename` must be a single
+/// plain component (no `/`, `.`, `..`); callers pass a pre-validated
+/// label into a fixed `forge-<label>-token` shape, same as the write
+/// side.
+fn delete_agent_state_file(agent_name: &str, filename: &str) -> Result<(String, String)> {
+    if filename.is_empty() || filename == "." || filename == ".." || filename.contains('/') {
+        bail!("delete_agent_state_file: refusing non-plain filename {filename:?}");
+    }
+    let path = PathBuf::from(AGENT_STATE_ROOT)
+        .join(agent_name)
+        .join("state")
+        .join(filename);
+    match std::fs::remove_file(&path) {
+        Ok(()) => {
+            tracing::info!(agent = %agent_name, file = %filename, "removed agent state file");
+        }
+        Err(e) if e.kind() == std::io::ErrorKind::NotFound => {}
+        Err(e) => return Err(e).with_context(|| format!("remove {}", path.display())),
+    }
+    Ok((String::new(), String::new()))
+}
+
 /// btrfs superblock magic, as reported by `statfs(2)`'s `f_type`.
 const BTRFS_SUPER_MAGIC: i64 = 0x9123_683E;
 

hive-sh4re/src/priv_proto.rs

@@ -427,6 +427,45 @@ pub enum PrivRequest {
         token: String,
     },
 
+    /// Write a per-agent account for an external, dashboard-declared forge:
+    /// the access token to
+    /// `AGENT_STATE_ROOT/<agent_name>/state/forge-<label>-token` (0600) and
+    /// a `forge-<label>.json` sidecar (`{"base_url": <base_url>}`, 0600) so
+    /// the base URL survives without any host-side nix config — the whole
+    /// account (label + URL + token) is operator-entered on the dashboard,
+    /// same shape as `WriteAgentMatrixToken`'s homeserver sidecar.
+    ///
+    /// `label` MUST be validated as a plain identifier (same rule as the
+    /// matrix `account` suffix) before it goes into the filename — a
+    /// crafted label could otherwise traverse out of the state dir. Same
+    /// write semantics as `WriteAgentForgeToken` — validates `agent_name`,
+    /// creates the state dir if absent, writes both files 0600, chowns to
+    /// the agent.
+    WriteAgentExtraForgeAccount {
+        /// Logical agent name (validated by `validate_agent_name`).
+        agent_name: String,
+        /// Dashboard-chosen label for this external forge. Validated as a
+        /// plain identifier before use.
+        label: String,
+        /// Base HTTP(S) URL of the external forge, operator-entered on the
+        /// dashboard (no host-side config).
+        base_url: String,
+        /// Token value. hive-priv appends a trailing newline before writing.
+        token: String,
+    },
+
+    /// Remove a previously-written `forge-<label>-token` + `forge-<label>.
+    /// json` from an agent's state dir — the revoke half of
+    /// `WriteAgentExtraForgeAccount`. Missing files are not an error
+    /// (idempotent revoke).
+    DeleteAgentExtraForgeAccount {
+        /// Logical agent name (validated by `validate_agent_name`).
+        agent_name: String,
+        /// The forge label to revoke. Validated as a plain identifier
+        /// before use.
+        label: String,
+    },
+
     /// Restart `hive-matrix-daemon.service` inside an agent container via
     /// `systemctl --machine=h-<agent_name> restart hive-matrix-daemon.service`.
     /// Used by hive-c0re to kick the daemon after a successful token write

nix/host-modules/hive-forge/default.nix

@@ -55,6 +55,15 @@ in
   # at `/var/lib/nixos-containers/hive-forge/var/lib/forgejo/` survives
   # restart. See `docs/gateway.md::hive-forge container shape`.
 
+  # External Forgejo/Gitea/Codeberg-compatible forges (beyond the mandatory
+  # internal one) are entirely dashboard-provisioned — no nix config here.
+  # An operator manually creates a token on the external forge (however
+  # that forge lets them) and pastes name + base URL + token into the
+  # dashboard's FORGES tab; hive-c0re just persists it to
+  # `<state>/forge-<label>-token` + a `<state>/forge-<label>.json` sidecar
+  # (base URL), the same shape as the GitHub PAT / matrix extra-account
+  # flows. See `hive-c0re/src/dashboard/extra_forges.rs`.
+
   # The internal forge is mandatory — it's the canonical store for the
   # meta flake + every agent's config repo (and the `internal/*` repos),
   # so there is no enable/disable toggle. It deploys whenever hyperhive