diff --git a/agents/sage/work/vikunja-setup/2026-10-11_remint.json b/agents/sage/work/vikunja-setup/2026-10-11_remint.json
new file mode 100644
index 000000000..fc4e26cd7
--- /dev/null
+++ b/agents/sage/work/vikunja-setup/2026-10-11_remint.json
@@ -0,0 +1,145 @@
+{
+ "at": "2026-10-11T18:11:17.758Z",
+ "origin": "https://tasks.woltje.com",
+ "by": "svc-mosaic-stack",
+ "keys": {
+  "pm": {
+   "id": 8,
+   "title": "mosaic-stack-pm-2026-10-11-q61a",
+   "expires": "2027-01-07T00:00:00Z",
+   "before": {
+    "labels": [
+     "read_all"
+    ],
+    "projects": [
+     "read_all",
+     "read_one",
+     "update",
+     "views_buckets_tasks"
+    ],
+    "tasks": [
+     "create",
+     "read_one",
+     "update"
+    ],
+    "tasks_assignees": [
+     "create",
+     "delete"
+    ],
+    "tasks_comments": [
+     "create"
+    ],
+    "tasks_labels": [
+     "create",
+     "delete"
+    ],
+    "tasks_relations": [
+     "create",
+     "delete"
+    ]
+   },
+   "permissions": {
+    "labels": [
+     "read_all"
+    ],
+    "projects": [
+     "create",
+     "read_all",
+     "read_one",
+     "update",
+     "views_buckets",
+     "views_buckets_post",
+     "views_buckets_put",
+     "views_buckets_tasks"
+    ],
+    "projects_views": [
+     "read_all",
+     "update"
+    ],
+    "tasks": [
+     "create",
+     "read_one",
+     "update"
+    ],
+    "tasks_assignees": [
+     "create",
+     "delete"
+    ],
+    "tasks_comments": [
+     "create"
+    ],
+    "tasks_labels": [
+     "create",
+     "delete"
+    ],
+    "tasks_relations": [
+     "create",
+     "delete"
+    ]
+   },
+   "control": [
+    404,
+    4002
+   ],
+   "projectsList": 200,
+   "fileMode": "600",
+   "revoked": 7,
+   "oldKeyAfterRevoke": 401,
+   "keysNow": [
+    8
+   ]
+  },
+  "sync": {
+   "id": 9,
+   "title": "mosaic-stack-sync-2026-10-11-q61a",
+   "expires": "2027-01-07T00:00:00Z",
+   "before": {
+    "projects": [
+     "read_one",
+     "views_buckets",
+     "views_buckets_tasks_get"
+    ],
+    "projects_views": [
+     "read_all"
+    ],
+    "tasks": [
+     "read_all",
+     "read_one"
+    ],
+    "tasks_comments": [
+     "read_all"
+    ]
+   },
+   "permissions": {
+    "projects": [
+     "read_all",
+     "read_one",
+     "views_buckets",
+     "views_buckets_tasks_get"
+    ],
+    "projects_views": [
+     "read_all"
+    ],
+    "tasks": [
+     "read_all",
+     "read_one"
+    ],
+    "tasks_comments": [
+     "read_all"
+    ]
+   },
+   "control": [
+    404,
+    4002
+   ],
+   "projectsList": 200,
+   "fileMode": "600",
+   "revoked": 6,
+   "oldKeyAfterRevoke": 401,
+   "keysNow": [
+    9
+   ]
+  }
+ },
+ "problems": []
+}
diff --git a/agents/sage/work/vikunja-setup/remint.mjs b/agents/sage/work/vikunja-setup/remint.mjs
new file mode 100644
index 000000000..1df6b0b6a
--- /dev/null
+++ b/agents/sage/work/vikunja-setup/remint.mjs
@@ -0,0 +1,87 @@
+// Sage, 2026-10-11: Q61a (Jason, relayed by Mos: "full agentic access", no task or project delete,
+// no share route). svc-mosaic-stack re-mints the pm and sync keys with added scopes: the pm gets
+// projects create plus bucket and view writes so the agents install #19's buckets, and the sync bot
+// gets projects read_all to find child projects. Each new key goes to a .new file (wx, 0600), is
+// checked with reads only, renamed over the old file, and the old key is revoked. No delete or write
+// is tried as a test; the bus startup probes run on the next start. Refuses if a bot's keys aren't
+// exactly the expected old key, or if a scope set holds a forbidden group or permission.
+// Usage: node remint.mjs https://tasks.woltje.com SVC_PASSWORD_FILE TOKEN_DIR OUT_JSON
+import { readFileSync, writeFileSync, existsSync, renameSync, statSync } from "node:fs";
+const [ORIGIN, PW, DIR, OUT] = process.argv.slice(2);
+if (!/^https:\/\/tasks\.woltje\.com$/.test(ORIGIN)) throw new Error("tasks.woltje.com only");
+if (!OUT || existsSync(OUT)) throw new Error("OUT_JSON missing or exists; refusing to rerun");
+const BASE = ORIGIN + "/api/v2";
+const EXP = "2027-01-07T00:00:00Z", MISSING = 2147483647;
+const KEYS = {
+  pm: { owner: 6, old: 7, add: { projects: ["create", "views_buckets", "views_buckets_put", "views_buckets_post"], projects_views: ["read_all", "update"] } },
+  sync: { owner: 10, old: 6, add: { projects: ["read_all"] } },
+};
+const FORBIDDEN_GROUPS = ["projects_shares", "projects_teams", "projects_users", "projects_webhooks", "teams", "users", "tokens"];
+// Delete on tasks and projects (and their views and buckets) is Jason's alone. Unassign, unlink and
+// unlabel are deletes of a join row, not of a task, and the pm already holds them.
+const forbidden = (g, p) => FORBIDDEN_GROUPS.includes(g) || ((g === "tasks" || g.startsWith("projects")) && /delete|duplicate/.test(p));
+async function api(method, path, body, auth) {
+  const headers = { "Content-Type": "application/json" };
+  if (auth) headers.Authorization = `Bearer ${auth}`;
+  const r = await fetch(BASE + path, { method, headers, body: body === undefined ? undefined : JSON.stringify(body), redirect: "error" });
+  const t = await r.text(); let json = null; try { json = JSON.parse(t); } catch {}
+  return { status: r.status, json };
+}
+const must = (r, l) => { if (r.status >= 300) throw new Error(`${l}: ${r.status} ${r.json?.code ?? ""} ${r.json?.message ?? ""}`); return r.json; };
+const items = (j, l) => { if (!Array.isArray(j?.items)) throw new Error(`${l}: no items array`); return j.items; };
+const norm = (p) => Object.fromEntries(Object.entries(p).map(([g, l]) => [g, [...new Set(l)].sort()]).sort(([a], [b]) => a.localeCompare(b)));
+
+const password = readFileSync(PW, "utf8").trim();
+const tok = must(await api("POST", "/login", { username: "svc-mosaic-stack", password }), "login svc").token;
+if (!tok) throw new Error("login svc: no token field");
+const secrets = [password, tok];
+const keysOf = (owner) => api("GET", `/tokens?owner_id=${owner}&per_page=50`, undefined, tok).then((r) => items(must(r, `keys ${owner}`), `keys ${owner}`));
+
+// Preconditions for both keys before any write.
+const plan = {};
+for (const [role, k] of Object.entries(KEYS)) {
+  const file = `${DIR}/${role}-vikunja.token`;
+  if (existsSync(`${file}.new`)) throw new Error(`${role}-vikunja.token.new exists; refusing`);
+  const l = await keysOf(k.owner);
+  if (l.map((x) => x.id).join() !== String(k.old)) throw new Error(`${role} bot keys are not exactly [${k.old}]; refusing`);
+  const perms = structuredClone(l[0].permissions);
+  for (const [g, ps] of Object.entries(k.add)) perms[g] = [...(perms[g] ?? []), ...ps];
+  for (const [g, ps] of Object.entries(perms)) for (const p of ps) if (forbidden(g, p)) throw new Error(`${role}: forbidden scope ${g}.${p}; refusing`);
+  const oldValue = readFileSync(file, "utf8").trim();
+  secrets.push(oldValue);
+  plan[role] = { file, oldValue, before: norm(l[0].permissions), perms: norm(perms) };
+}
+
+const rec = { at: new Date().toISOString(), origin: ORIGIN, by: "svc-mosaic-stack", keys: {}, problems: [] };
+for (const [role, k] of Object.entries(KEYS)) {
+  const { file, oldValue, before, perms } = plan[role];
+  const title = `mosaic-stack-${role}-${new Date().toISOString().slice(0, 10)}-q61a`;
+  const m = await api("POST", "/tokens", { title, owner_id: k.owner, expires_at: EXP, permissions: perms }, tok);
+  if (m.status !== 201 || typeof m.json?.token !== "string") throw new Error(`mint ${role}: ${m.status} ${m.json?.code ?? ""} ${m.json?.message ?? ""}`);
+  const value = m.json.token;
+  secrets.push(value);
+  writeFileSync(`${file}.new`, value, { flag: "wx", mode: 0o600 });
+  const ctl = await api("GET", `/tasks/${MISSING}`, undefined, value);
+  const list = await api("GET", "/projects?per_page=1", undefined, value);
+  const r = { id: m.json.id, title, expires: m.json.expires_at, before, permissions: norm(m.json.permissions ?? {}), control: [ctl.status, ctl.json?.code], projectsList: list.status };
+  rec.keys[role] = r;
+  if (ctl.status !== 404 || ctl.json?.code !== 4002 || list.status !== 200) throw new Error(`new ${role} key check failed: ${JSON.stringify(r)}; .new kept, old key ${k.old} untouched`);
+  if (JSON.stringify(r.permissions) !== JSON.stringify(perms)) rec.problems.push(`${role} permissions differ from the request`);
+  renameSync(`${file}.new`, file);
+  r.fileMode = (statSync(file).mode & 0o777).toString(8);
+  if (readFileSync(file, "utf8").trim() !== value) rec.problems.push(`${role} file does not hold the new key`);
+  must(await api("DELETE", `/tokens/${k.old}`, undefined, tok), `revoke old ${role} key`);
+  r.revoked = k.old;
+  r.oldKeyAfterRevoke = (await api("GET", `/tasks/${MISSING}`, undefined, oldValue)).status;
+  r.keysNow = (await keysOf(k.owner)).map((x) => x.id);
+  if (r.expires !== EXP) rec.problems.push(`${role} expiry differs`);
+  if (r.oldKeyAfterRevoke !== 401) rec.problems.push(`old ${role} key still answers`);
+  if (r.keysNow.join() !== String(r.id)) rec.problems.push(`${role} bot keys are not exactly the new one`);
+  if (r.fileMode !== "600") rec.problems.push(`${role} file mode not 600`);
+}
+
+const out = JSON.stringify(rec, null, 1) + "\n";
+if (secrets.some((s) => out.includes(s))) throw new Error("secret in the record; not written");
+writeFileSync(OUT, out, { flag: "wx" });
+process.stdout.write(out);
+if (rec.problems.length) process.exit(2);
diff --git a/docs/plans/2026-09-26_lead-decisions.md b/docs/plans/2026-09-26_lead-decisions.md
index dcceaf9a4..72eee7493 100644
--- a/docs/plans/2026-09-26_lead-decisions.md
+++ b/docs/plans/2026-09-26_lead-decisions.md
@@ -1811,3 +1811,33 @@ which stay with him. Each item names who decided it and what happened.
     - Open: projects.create for the pm (asked of Jason via Mos), and Q61
       (which project the bus watches). Project 32 stays deleted. Jason
       removed it as a duplicate of #19, and recreate.mjs is gone.
+86. **The agents bind the bus to #19 and follow nested projects (2026-10-11,
+    Q61a).** Jason, relayed by Mos: "just share them. Get it done. You
+    keep wanting me to do all the manual steps." The agents do every
+    step, and Jason does none of them. This replaces the holds in 85.
+    - ops-01 inserts the team shares on #3, #4 and #33 (team 1 at admin,
+      team 2 at read). Access cascades to their descendants.
+    - Keys re-minted with "full agentic access" and still no task or
+      project delete, no duplicate and no share, team, user or webhook
+      route (Q60). The pm is key 8: key 7's scopes plus projects create,
+      views_buckets, views_buckets_put and views_buckets_post, and
+      projects_views read_all and update. The sync bot is key 9: key 6's
+      scopes plus projects read_all. Keys 7 and 6 are revoked and answer
+      401. Evidence: `agents/sage/work/vikunja-setup/2026-10-11_remint.json`.
+    - The bus binds to #19 "Mosaic Stack". Its kanban gets the five
+      buckets by renaming where the mapping is obvious (To-Do to todo,
+      Doing to in-progress, Done to done) and adding in-review and
+      blocked. Jason's tasks stay where they are. A before-state file
+      comes first.
+    - Child boards are watch-only. The agents never rename or add
+      buckets on them.
+    - Rows A and B (`docs/plans/2026-10-11_multi-project-sync.md`):
+      read-only nested sync now, and verbs across the tree after row A
+      is done. Mos ruled that task.create takes an optional project,
+      which must be an installed project in the tree.
+    - Correction to 85: no adapter archive guard is needed now. The
+      adapter has no project verb, so the pm's projects.update can't
+      reach a project through the bus. The row that adds a project verb
+      adds the guard.
+    - Projects.create is used once now, for "SetSpark" and "Launchpad"
+      under #33, with no tasks.
diff --git a/docs/plans/2026-10-11_multi-project-sync.md b/docs/plans/2026-10-11_multi-project-sync.md
new file mode 100644
index 000000000..9301de2e7
--- /dev/null
+++ b/docs/plans/2026-10-11_multi-project-sync.md
@@ -0,0 +1,151 @@
+# Multi-project sync: rows A and B (2026-10-11)
+
+Status: written by Sage, lead. It follows `docs/plans/BRIEF-TEMPLATE.md`.
+Jason answered Q61a, relayed by Mos: agents see and work his nested
+projects ("just share them. Get it done."). Mos ruled the shape: row A
+now, row B after row A is done, and task.create takes an optional
+project. Lead decision 86 records it.
+
+Three constraints hold for both rows. A change that breaks one of them
+is out of scope, whatever else it fixes.
+
+- A task's ledger ref stays `vikunja:<project>/<task>`. The ledger
+  checks that form on `task_snapshots`, `decisions` and the `events`
+  subject (`packages/bus/schema.sql`), and `task_snapshots` is
+  append-only. Neither row changes `packages/bus/`. Never key a task by
+  its id alone.
+- `tracker.descendants` defaults to false. With it false, the adapter
+  behaves exactly as v0 does, and every v0 test passes unchanged.
+- The adapter never writes to a board. A child project is installed
+  only if its one manual kanban view already has the five buckets
+  (`todo`, `in-progress`, `in-review`, `blocked`, `done`), done and
+  default wired, as the root's install check requires. Any other child
+  is watch-only. No bucket, view or project write ships in either row.
+
+## Multi-project sync: the adapter reads a project tree (row A)
+
+### Problem
+
+The adapter watches one project. `settings()` takes one
+`tracker.project` (`packages/tasks/src/adapter.mjs:21`), startup checks
+that project alone (`startup.mjs:37`), and sync reads its board and task
+list only (`sync.mjs:21`, `sync.mjs:45`). A task in any other project is
+a shape error in the walk (`sync.mjs:59`), and a move to another project
+is a tombstone (`sync.mjs:123`). Jason's projects nest. The bus binds
+to #19 "Mosaic Stack", and he wants agents to follow work into its
+child projects.
+
+### Owner and reviewer
+
+- Owner: Darkwing.
+- Reviewers: Dewey and Filbert.
+
+### Files owned
+
+- `packages/business/src/vars.mjs` and `packages/business/tests/vars.test.mjs`
+- `packages/tasks/src/adapter.mjs`, `startup.mjs`, `sync.mjs`,
+  `fake.mjs`, `vikunja.mjs`, `index.mjs`
+- `packages/tasks/tests/` (all files and fixtures)
+- `packages/tasks/README.md`, `packages/tasks/live/README.md`
+- `agents/darkwing/work/queue-<row>/`
+
+`verbs.mjs` is read-only in this row. Verbs keep refusing a task outside
+the root with `task-project`, as they do now.
+
+### What ships
+
+- `tracker.descendants`, a project-layer boolean var, default false.
+  `tracker.project` stays the root.
+- With descendants on, the tree is the root plus every descendant the
+  sync bot can see through `GET /projects` (key 9 has `projects
+  read_all`), followed by `parent_project_id`. Discovery runs at startup
+  and at each reconcile, not each tick. Archived projects are not in the
+  tree. Record your rule for a project that leaves the tree (archived,
+  moved out, unshared or deleted) in the README and test it. Its tasks
+  become `task.missing` with a reason. The ledger is never rewritten.
+- Install state per project. The root's install check refuses the
+  business, exactly as today. A child that passes the same check is
+  installed. A child that fails it is watch-only and never refuses the
+  business. Sync records title, done, assignees and comments for a
+  watch-only child, and no bucket state.
+- Sync covers each project in the tree. A task moved between two
+  projects in the tree gets the `moved` tombstone naming the new project
+  and a snapshot under its new ref. A move out of the tree stays the
+  tombstone it is today.
+- Poll cost. Probe whether v2.7.0 serves a cross-project task read to the
+  sync key's scopes. If it does, use one read per tick for the tree. If
+  not, read per project and state the per-tick call count in the README.
+  The probe results go in `agents/darkwing/work/queue-<row>/probes.md`.
+- `fake.mjs` models `parent_project_id`, the project list route,
+  archived projects and access inherited from an ancestor's share.
+- Tests: descendants off matches v0; a three-level tree; a watch-only
+  child keeps the business ready; a root without buckets refuses; moves
+  root to child, child to child and child to outside; a new child appears
+  at reconcile; a child leaves the tree.
+- Gate suites: `node --test 'packages/tasks/tests/*.test.mjs'`,
+  `node --test 'packages/business/tests/*.test.mjs'`,
+  `node --test 'packages/bus/tests/*.test.mjs'`, and every
+  `scripts/test-*.sh`.
+
+### Out of scope
+
+Verbs on child projects (row B). Any change to `packages/bus/`. Any write
+to a Vikunja board or project. An archive guard: the adapter has no
+project verb, so the pm's `projects.update` can't reach a project through
+the bus. A row that adds a project verb adds the guard.
+
+### Gate
+
+Dewey and Filbert approve on the issue, naming the candidate manifest.
+The suites above pass on Sage's gate rerun. Sage then runs one live read
+against tasks.woltje.com with descendants on, root #19, read-only, and
+attaches the tick log.
+
+## Multi-project verbs: task verbs across the tree (row B)
+
+### Problem
+
+After row A, the bus sees child projects but can't act in them.
+`target()` and `relation()` refuse a ref from another project
+(`verbs.mjs:74`, `verbs.mjs:79`), `read()` refuses a task that isn't in
+the root (`verbs.mjs:88`), and `task.create` always posts to the root
+(`verbs.mjs:355`) with no project argument.
+
+### Owner and reviewer
+
+- Owner: Darkwing, after row A is done.
+- Reviewers: Dewey and Filbert.
+
+### Files owned
+
+- `packages/tasks/src/verbs.mjs`, `fake.mjs`
+- `packages/tasks/tests/verbs.test.mjs` and fixtures
+- `packages/tasks/README.md`
+- `packages/harness/src/tools.mjs` (the `task_create` tool schema gets
+  the optional project) and its test
+- `agents/darkwing/work/queue-<row>/`
+
+### What ships
+
+- Mos's ruling: `task.create` takes an optional `project`. It must be an
+  installed project in the tree; a watch-only or unknown project refuses
+  with a new code the README names. Without it, the task goes to the
+  root, as today.
+- `target()`, `relation()` and `read()` accept a task in any installed
+  project of the tree. A bucket move uses that project's own view and
+  buckets, not the root's.
+- A verb on a task in a watch-only project refuses with the same new
+  code.
+- Tests for each verb across two installed projects, a watch-only refusal
+  and a relation between projects.
+- Gate suites as row A.
+
+### Out of scope
+
+Project verbs (create, rename, archive, move). They need their own
+brief, an archive guard and a ruling.
+
+### Gate
+
+Dewey and Filbert approve on the issue, naming the candidate manifest,
+and the suites pass on Sage's gate rerun.