diff --git a/changelog.d/1900-team-dossier-off-the-poll.fixed.md b/changelog.d/1900-team-dossier-off-the-poll.fixed.md
new file mode 100644
index 000000000..802061e11
--- /dev/null
+++ b/changelog.d/1900-team-dossier-off-the-poll.fixed.md
@@ -0,0 +1 @@
+Project board: the five-second refresh no longer re-reads the team dossier — `project-team` is read once when the board opens and handed back to each poll, so an open board stops re-reading persona and memory files (about 192 KB a minute) for an answer only an edit changes; a dossier that fails to read now leaves the rows, the done group and the tasks on screen with an empty team block instead of showing "No Project yet" ([#1900](https://github.com/ThinkFlowLab/FlyBot/issues/1900)).
diff --git a/core/client.js b/core/client.js
index aeef9850b..a47a44925 100644
--- a/core/client.js
+++ b/core/client.js
@@ -11260,7 +11260,7 @@ function ProjectMembersPanel({ project, rows, onClose } = {}) {
     )
   );
 }
-async function readProjectBoard(read, wanted) {
+async function readProjectBoard(read, wanted, knownTeam) {
   const listing = await read("projects");
   const projects = Array.isArray(listing?.projects) ? listing.projects : [];
   const project = wanted === "" ? projects[0] : projects.find((item) => item.id === wanted);
@@ -11270,7 +11270,7 @@ async function readProjectBoard(read, wanted) {
     read("project-read", { id: project.id }),
     read("project-board", { id: project.id, timeZone: zone }),
     read("tasks", {}),
-    read("project-team", { id: project.id })
+    knownTeam !== void 0 ? knownTeam : read("project-team", { id: project.id }).catch(() => null)
   ]);
   const tasks = Array.isArray(taskList) ? taskList : taskList?.tasks ?? [];
   const queues = { waiting: board?.waiting, inflight: board?.inflight, blocked: board?.blocked, counts: board?.counts ?? null };
@@ -11328,11 +11328,15 @@ function ProjectBoardOverlay({ actions, call: request } = {}) {
     }
     const wanted = hash.slice("#project".length).replace(/^=/, "");
     let gone = false;
-    const loadBoard = () => readProjectBoard(read, wanted);
+    let team;
+    const loadBoard = () => readProjectBoard(read, wanted, team);
     const refresh = async (first) => {
       try {
         const next = await loadBoard();
-        if (!gone) setState(next);
+        if (!gone) {
+          team = next.team;
+          setState(next);
+        }
       } catch {
         if (!gone && first) setState({ project: null, rows: [], canManage: false, tasks: [] });
       }
diff --git a/core/src/client/project-board.js b/core/src/client/project-board.js
index 4f8e0cbbc..98dc3ade6 100644
--- a/core/src/client/project-board.js
+++ b/core/src/client/project-board.js
@@ -865,8 +865,11 @@ export function ProjectMembersPanel({ project, rows, onClose } = {}) {
 }
 
 // #1864: one read for the whole board, exported so a test can prove the dossier comes from a single
-// `project-team` call. `read` is the channel seam (`call` in the app).
-export async function readProjectBoard(read, wanted) {
+// `project-team` call. `read` is the channel seam (`call` in the app). #1900: the dossier is the one
+// answer the poll hands back — `knownTeam` is what the open read — because the host builds it by
+// reading persona and memory files, and a five-second refresh must not pay that again. A refusal
+// leaves the rest of the board standing, so a dossier problem is never the empty-Project answer.
+export async function readProjectBoard(read, wanted, knownTeam) {
   const listing = await read('projects')
   const projects = Array.isArray(listing?.projects) ? listing.projects : []
   const project = wanted === '' ? projects[0] : projects.find(item => item.id === wanted)
@@ -878,7 +881,7 @@ export async function readProjectBoard(read, wanted) {
     read('project-read', { id: project.id }),
     read('project-board', { id: project.id, timeZone: zone }),
     read('tasks', {}),
-    read('project-team', { id: project.id }),
+    knownTeam !== undefined ? knownTeam : read('project-team', { id: project.id }).catch(() => null),
   ])
   const tasks = Array.isArray(taskList) ? taskList : (taskList?.tasks ?? [])
   // The groups are the same read as the rows, so the header cannot disagree with the cards.
@@ -950,12 +953,15 @@ export function ProjectBoardOverlay({ actions, call: request } = {}) {
     const wanted = hash.slice('#project'.length).replace(/^=/, '')
     let gone = false
     // #1864: the board, its record, its rows, the task texts and the team dossier are one read path,
-    // and the dossier comes from the single `project-team` call that read makes.
-    const loadBoard = () => readProjectBoard(read, wanted)
+    // and the dossier comes from the single `project-team` call that read makes. #1900: that call is
+    // this open's, not the poll's — `team` is handed back on every later read, so a tick re-reads
+    // only the three answers that change and the dossier is read again on the next board open.
+    let team
+    const loadBoard = () => readProjectBoard(read, wanted, team)
     const refresh = async (first) => {
       try {
         const next = await loadBoard()
-        if (!gone) setState(next)
+        if (!gone) { team = next.team; setState(next) }
       } catch {
         // The first read is the page's answer, so it takes the empty state it always took. A poll
         // that fails keeps the board the last good read drew (#1814): a board that vanishes under
diff --git a/core/test/project-board-panels.test.js b/core/test/project-board-panels.test.js
index 6f4a2de11..668dc8bbf 100644
--- a/core/test/project-board-panels.test.js
+++ b/core/test/project-board-panels.test.js
@@ -537,6 +537,68 @@ test('the board reads the dossier from exactly one project-team call', async ()
   assert.deepEqual(opened.map(entry => entry.botId), ['bot-chief'])
 })
 
+// #1900: the board re-reads itself every five seconds (#1814), and the team dossier rode that same
+// read, so an open board re-read persona and memory files — up to ~192 KB a minute — for an answer
+// only an edit changes. The dossier is read when the board opens; the poll hands back the answer it
+// already has, and `project-team` is not asked again.
+test('#1900: a poll re-reads the board and the task texts, not the team dossier', async () => {
+  resetSlots()
+  const calls = []
+  const read = async (endpoint) => {
+    calls.push(endpoint)
+    if (endpoint === 'projects') return { projects: [{ id: 'project-1', name: 'FlyBot', role: 'owner', choices: [] }] }
+    if (endpoint === 'project-read') return { project: projectRecord(), canManage: true }
+    if (endpoint === 'project-board') return { ...boardAnswer(), tasks: rows, done: [{ id: 'task-done', column: 'done', title: 'Finished' }] }
+    if (endpoint === 'tasks') return [{ id: 'task-1', title: 'Ship the poll' }]
+    if (endpoint === 'project-team') return { rows: [dossier(), null, { ...dossier(), botId: 'bot-dev', name: 'Dev' }] }
+    throw new Error(`unexpected endpoint ${endpoint}`)
+  }
+  const open = await readProjectBoard(read, 'project-1')
+  const poll = await readProjectBoard(read, 'project-1', open.team)
+  assert.equal(calls.filter(endpoint => endpoint === 'project-team').length, 1, 'the open reads the dossier once, and the poll does not ask again')
+  assert.equal(calls.filter(endpoint => endpoint === 'project-board').length, 2, 'the poll still re-reads the board, which is what it is for')
+  assert.deepEqual(poll.rows.map(row => row.id), ['task-1'], 'the poll keeps the rows it read')
+  assert.deepEqual(poll.done.map(row => row.id), ['task-done'], 'and the done group')
+  assert.deepEqual(poll.tasks.map(task => task.id), ['task-1'], 'and the task texts')
+  assert.deepEqual(poll.team.rows.map(row => row?.botId ?? null), ['bot-chief', null, 'bot-dev'], 'the one dossier answer survives whole, null row included')
+
+  // The block still draws its three rows, and the panel its three sections, from that one answer.
+  const tree = render(ProjectBoardPane, { project: poll.project, rows: poll.rows, done: poll.done, tasks: poll.tasks, team: poll.team, canManage: true })
+  assert.deepEqual(all(tree).filter(node => node.props?.['data-team-role'] !== undefined).map(node => node.props['data-team-role']), ['chief', 'agent', 'pool'])
+  const drawn = text(render(ProjectDossierPanel, { row: poll.team.rows[0], label: 'Project Chief' }))
+  assert.match(drawn, /Persona/, 'Persona still draws from the one answer')
+  assert.match(drawn, /Project Chief of FlyBot/)
+  assert.match(drawn, /Memory/, 'Memory still draws from the one answer')
+  assert.match(drawn, /The Chief remembers the Project\./)
+  assert.match(drawn, /Skills/, 'Skills still draw from the one answer')
+  assert.match(drawn, /ship-it/)
+})
+
+// #1900: the same read path must not make a failing dossier fatal. The board's first paint used to
+// turn a thrown `project-team` into "No Project yet — create one.", which is the answer reserved for
+// a Project that really is absent; the rows, the done group and the tasks are a different answer.
+test('#1900: a refused dossier still draws rows, done and tasks, not the empty Project', async () => {
+  resetSlots()
+  const read = async (endpoint) => {
+    if (endpoint === 'projects') return { projects: [{ id: 'project-1', name: 'FlyBot' }] }
+    if (endpoint === 'project-read') return { project: projectRecord(), canManage: true }
+    if (endpoint === 'project-board') return { ...boardAnswer(), tasks: rows, done: [{ id: 'task-done', column: 'done', title: 'Finished' }] }
+    if (endpoint === 'tasks') return [{ id: 'task-1', title: 'Ship the poll' }]
+    if (endpoint === 'project-team') throw new Error('project-team: cannot read the memory of bot-chief')
+    throw new Error(`unexpected endpoint ${endpoint}`)
+  }
+  const state = await readProjectBoard(read, 'project-1')
+  assert.notEqual(state.project, null, 'a refused dossier is not the empty Project')
+  assert.equal(state.project.id, 'project-1')
+  assert.deepEqual(state.rows.map(row => row.id), ['task-1'], 'the rows still come back')
+  assert.deepEqual(state.done.map(row => row.id), ['task-done'], 'and the done group')
+  assert.deepEqual(state.tasks.map(task => task.id), ['task-1'], 'and the task texts')
+  assert.deepEqual(Array.from(state.team.rows), [], 'the team block reads empty instead of failing the page')
+  const drawn = all(render(ProjectBoardPane, { project: state.project, rows: state.rows, done: state.done, tasks: state.tasks, team: state.team, canManage: true })).map(text).join(' | ')
+  assert.match(drawn, /Ship the poll/, 'the board the reader gets still carries the tasks')
+  assert.doesNotMatch(drawn, /No Project yet/, 'and is not the create-a-Project page')
+})
+
 // #1892: the role pool is a rank list, not a Bot the board holds a dossier answer for.
 // `project-team` answers rows keyed by the Project's own Bots, so a pool click asked for a row the
 // host never sent and drew an empty panel. A pool entry now reads `@id` beside its rank; the Chief
diff --git a/core/test/project-board-view.test.js b/core/test/project-board-view.test.js
index c4310a890..4542a3c62 100644
--- a/core/test/project-board-view.test.js
+++ b/core/test/project-board-view.test.js
@@ -353,7 +353,9 @@ test('#1814: an open board reads on every tick, stops once a row opens its own b
   assert.match(textIn(tree), /Dev4 · stalled/, 'the board draws what the first read answered')
   const afterFirst = count.calls
   await tick()
-  assert.equal(count.calls, afterFirst + 5, 'an open board reads again on the next tick')
+  // #1900: a tick is four calls now — the listing, the record, the board and the task texts. The
+  // fifth, the team dossier, belongs to the open and is not re-read (see the #1900 test below).
+  assert.equal(count.calls, afterFirst + 4, 'an open board reads again on the next tick, without the dossier')
   // A row opens its own board: the hash names the task and this board stops drawing, so a tick that
   // lands before the cleanup must not read. This segment pins the unmount, not the predicate.
   const afterTick = count.calls
@@ -363,7 +365,7 @@ test('#1814: an open board reads on every tick, stops once a row opens its own b
   // Closing that board puts this one back in front: the next tick reads again.
   win.location.hash = '#project'
   await tick()
-  assert.equal(count.calls, afterTick + 5, 'closing the row’s board resumes the poll')
+  assert.equal(count.calls, afterTick + 4, 'closing the row’s board resumes the poll')
   // A hidden tab reads nothing either — this is the segment the named predicate is pinned by.
   const afterResume = count.calls
   doc.visibilityState = 'hidden'
@@ -371,7 +373,7 @@ test('#1814: an open board reads on every tick, stops once a row opens its own b
   assert.equal(count.calls, afterResume, 'no read in a hidden tab')
   doc.visibilityState = 'visible'
   await tick()
-  assert.equal(count.calls, afterResume + 5, 'a visible tab reads again on the next tick')
+  assert.equal(count.calls, afterResume + 4, 'a visible tab reads again on the next tick')
   // Close the board: the timer goes with it, so a tick afterwards reads nothing at all.
   const afterVisible = count.calls
   for (const off of cleanups) off()
@@ -380,6 +382,48 @@ test('#1814: an open board reads on every tick, stops once a row opens its own b
   assert.equal(count.calls, afterVisible, 'nothing reads after the board closed')
 })
 
+// #1900: the dossier is `project-team`, which the host answers by reading persona and memory files
+// and resending their heads — up to ~16 KB every 5 s, an answer that only an edit changes. The poll
+// is wanted (#1814); the dossier riding on it is not. One open reads it, and every tick after that
+// reads only what the board is polling for.
+test('#1900: an open board reads the dossier once, never on a tick', async () => {
+  resetClock()
+  win.location.hash = '#project'
+  const calls = []
+  const call = async (name) => {
+    calls.push(name)
+    if (name === 'projects') return { projects: [{ id: 'project-1', name: 'FlyBot' }] }
+    if (name === 'project-read') {
+      return { project: { id: 'project-1', name: 'FlyBot', chief: { botId: 'bot-chief' }, assistant: { botId: 'bot-assistant' }, roles: { maintainers: ['bot-dev'], members: [] } }, canManage: false }
+    }
+    if (name === 'project-board') return { tasks: rows, done: [], waiting: [], inflight: [], blocked: [], counts: null }
+    if (name === 'tasks') return [{ id: 'task-b1', title: 'Ship the poll' }]
+    if (name === 'project-team') {
+      return { rows: [{ botId: 'bot-chief', name: 'Project Chief', persona: 'You are the Project Chief of FlyBot.', memory: { head: 'The Chief remembers the Project.', topics: ['work'] }, skills: ['ship-it'] }] }
+    }
+    throw new Error(`unexpected endpoint ${name}`)
+  }
+  const count = (endpoint) => calls.filter(name => name === endpoint).length
+  const { tree, redraw } = await mount({ actions: {}, call })
+  assert.equal(count('project-team'), 1, 'opening the board reads the dossier once')
+  assert.equal(count('project-board'), 1, 'and the board once')
+  // The one answer still feeds the row and the panel the reader opens from it.
+  const control = all(tree).find(node => node.props?.['data-dossier-bot'] === 'bot-chief')
+  assert.ok(control, 'the Chief row carries its Dossier control from that answer')
+  control.props.onClick()
+  const drawn = all(redraw()).map(textOf).join(' | ')
+  assert.match(drawn, /Persona/)
+  assert.match(drawn, /You are the Project Chief of FlyBot\./)
+  assert.match(drawn, /Memory/)
+  assert.match(drawn, /The Chief remembers the Project\./)
+  assert.match(drawn, /Skills/)
+  assert.match(drawn, /ship-it/)
+  // Three ticks: the board is re-read each time, the dossier is not read again at all.
+  await tick(3)
+  assert.equal(count('project-team'), 1, 'three polls later the dossier has not been read again')
+  assert.equal(count('project-board'), 4, 'while the board itself is re-read on every tick')
+})
+
 test('#1814: a failing poll keeps the board the last good read drew', async () => {
   resetClock()
   win.location.hash = '#project'
diff --git a/docs/subsystems/core-client.md b/docs/subsystems/core-client.md
index b8ad95e90..4b96fc1c2 100644
--- a/docs/subsystems/core-client.md
+++ b/docs/subsystems/core-client.md
@@ -323,7 +323,10 @@ instructions, role and model), **Memory** (the `MEMORY.md` head and the topic na
 (the attached `skill` capability names). The panel never re-fetches per section, and a `null` row —
 the host's answer for a deleted Bot — shows *Not set* with nothing invented. `readProjectBoard`
 keeps the dossier on the same read as the rows, so the board and the panel cannot disagree, and the
-"my agent" row uses the same panel. A role-pool entry draws none: since #1892 it is plain `@id`
+"my agent" row uses the same panel. Since #1900 that one answer is the open's, not the poll's: the
+five-second refresh hands it back instead of asking `project-team` again, because the host builds it by
+reading persona and memory files, and a refused dossier leaves the rows, the done group and the tasks
+on screen with an empty team block instead of the empty-Project answer. A role-pool entry draws none: since #1892 it is plain `@id`
 beside its rank, because `project-team` answers rows keyed by the Project's own Bots and the old
 control asked for a row the host never sent. The entry in the owner's own Bot chat is
 `ProjectAgentEntry` in the header: the roster already carries `bot.projectId`, the entry reads
@@ -357,10 +360,12 @@ carried in and has no board of its own). A row with a board is a button: it writ
 group and clears the hash, so a reload does not reopen the same board. A row without a board (or without a
 task record) is not a button — `role` alone opens nothing. Opening the pane is four host reads, never a
 per-Bot read: `projects`, `project-read`, `project-board`, and the `tasks` list the rows are joined
-against. Since #1814 they repeat every five seconds while the pane is open, because what a card has
+against. Since #1814 those four repeat every five seconds while the pane is open, because what a card has
 waited and whether its lease is live are computed by the host at read time: a lease that expires during
 the visit turns the card `stalled` on its own instead of freezing the board. The first read failing
-answers the empty state as it did; a poll that fails keeps the board the last good read drew. Polling
+answers the empty state as it did; a poll that fails keeps the board the last good read drew. The
+dossier is not among the four (#1900): it is read once when the pane opens and again on the next open,
+not on a tick. Polling
 pauses while a row's own board is open (the hash no longer names this Project) and while the tab is
 hidden, and a read that lands after the pane closed is dropped. Tests:
 `core/test/project-board-view.test.js`, `core/test/project-board.test.js`,
diff --git a/patches/ds-bot/0008-client-bundle.patch b/patches/ds-bot/0008-client-bundle.patch
index 0c2147401..ded5eca38 100644
--- a/patches/ds-bot/0008-client-bundle.patch
+++ b/patches/ds-bot/0008-client-bundle.patch
@@ -7527,11 +7527,22 @@ diff --git a/client.js b/client.js
 +      setBusy("");
      }
 -  });
--}
++  };
++  return (0, import_react9.createElement)(
++    "div",
++    { className: "bt-file-chips" },
++    files.map((file) => (0, import_react9.createElement)(
++      "button",
++      { key: file.id, type: "button", className: "bt-file-chip", disabled: busy === file.id, title: `Download ${file.name} (untrusted file from a remote Bot)`, onClick: () => download2(file) },
++      `📎 ${file.name} · ${fileSize(file.size)}`
++    )),
++    error ? (0, import_react9.createElement)("span", { className: "bt-file-error", role: "alert" }, error) : null
++  );
+ }
 -function ScopeSwitch({ value, onChange, bot }) {
 -  const options = [["all", t("All Bots")], ["bot", t("Only {name}", { name: bot.name })]];
 -  return (0, import_react5.createElement)(
-+  };
++function GroupEvent({ prefix, room: room2, name, roster, actions }) {
 +  return (0, import_react9.createElement)(
      "div",
 -    { className: "bt-secret-scope", role: "radiogroup", "aria-label": t("Who may use it") },
@@ -7544,18 +7555,6 @@ diff --git a/client.js b/client.js
 -      className: "bt-secret-seg",
 -      onClick: () => onChange(id)
 -    }, text))
-+    { className: "bt-file-chips" },
-+    files.map((file) => (0, import_react9.createElement)(
-+      "button",
-+      { key: file.id, type: "button", className: "bt-file-chip", disabled: busy === file.id, title: `Download ${file.name} (untrusted file from a remote Bot)`, onClick: () => download2(file) },
-+      `📎 ${file.name} · ${fileSize(file.size)}`
-+    )),
-+    error ? (0, import_react9.createElement)("span", { className: "bt-file-error", role: "alert" }, error) : null
-+  );
-+}
-+function GroupEvent({ prefix, room: room2, name, roster, actions }) {
-+  return (0, import_react9.createElement)(
-+    "div",
 +    { className: "bt-event" },
 +    (0, import_react9.createElement)("span", null, prefix),
 +    room2 ? (0, import_react9.createElement)("button", { type: "button", onClick: () => actions.openSession(room2.id) }, (0, import_react9.createElement)(RoomAvatar, { room: room2, roster, size: 16 }), room2.name) : name ? (0, import_react9.createElement)("span", null, name) : null
@@ -9854,13 +9853,13 @@ diff --git a/client.js b/client.js
 +    const custom = typeof reply.custom === "string" ? reply.custom.trim() : "";
 +    if (selected.length === 0 && custom === "") return void 0;
 +    return Promise.resolve(actions.answerQuestion(card.sessionId, card.question.id, { selected, custom }));
-   }
++  }
 +  if (card?.kind === "task" && card.status === "input") {
 +    const text2 = typeof choice === "string" ? choice.trim() : "";
 +    const questionId = card.task?.inputRequest?.id;
 +    if (text2 === "" || typeof questionId !== "string") return void 0;
 +    return Promise.resolve(actions.answerTaskInput(card.task.id, questionId, text2));
-+  }
+   }
 +  if (card?.kind === "task" && card.status === "result") {
 +    if (choice === "accept") return Promise.resolve(actions.acceptTaskResult(card.task.id));
 +    const note = choice !== null && typeof choice === "object" ? String(choice.note ?? "").trim() : "";
@@ -12248,7 +12247,7 @@ diff --git a/client.js b/client.js
        setOpen(false);
      };
      const onKey = (event) => {
-@@ -5097,412 +5097,1330 @@ function UpdateButton({ useUpdate, actions }) {
+@@ -5097,412 +5097,1334 @@ function UpdateButton({ useUpdate, actions }) {
        window.removeEventListener("keydown", onKey, true);
      };
    }, [open]);
@@ -13672,7 +13671,7 @@ diff --git a/client.js b/client.js
 -    }
 -    if (id !== "" && (roster.roomsById[id] || (actions.isAgentSession?.(id) ?? roster.agentOf[id] !== void 0) || blank3 !== "1")) {
 -      lastBot.current = null;
-+async function readProjectBoard(read, wanted) {
++async function readProjectBoard(read, wanted, knownTeam) {
 +  const listing = await read("projects");
 +  const projects = Array.isArray(listing?.projects) ? listing.projects : [];
 +  const project = wanted === "" ? projects[0] : projects.find((item) => item.id === wanted);
@@ -13682,7 +13681,7 @@ diff --git a/client.js b/client.js
 +    read("project-read", { id: project.id }),
 +    read("project-board", { id: project.id, timeZone: zone }),
 +    read("tasks", {}),
-+    read("project-team", { id: project.id })
++    knownTeam !== void 0 ? knownTeam : read("project-team", { id: project.id }).catch(() => null)
 +  ]);
 +  const tasks = Array.isArray(taskList) ? taskList : taskList?.tasks ?? [];
 +  const queues = { waiting: board?.waiting, inflight: board?.inflight, blocked: board?.blocked, counts: board?.counts ?? null };
@@ -13758,11 +13757,15 @@ diff --git a/client.js b/client.js
 -    wide ? (0, import_react8.createElement)("span", { className: "bt-return-name" }, t("DS Bot")) : null
 +    const wanted = hash.slice("#project".length).replace(/^=/, "");
 +    let gone = false;
-+    const loadBoard = () => readProjectBoard(read, wanted);
++    let team;
++    const loadBoard = () => readProjectBoard(read, wanted, team);
 +    const refresh = async (first) => {
 +      try {
 +        const next = await loadBoard();
-+        if (!gone) setState(next);
++        if (!gone) {
++          team = next.team;
++          setState(next);
++        }
 +      } catch {
 +        if (!gone && first) setState({ project: null, rows: [], canManage: false, tasks: [] });
 +      }
diff --git a/patches/ds-bot/files/src/client/project-board.js b/patches/ds-bot/files/src/client/project-board.js
index 4f8e0cbbc..98dc3ade6 100644
--- a/patches/ds-bot/files/src/client/project-board.js
+++ b/patches/ds-bot/files/src/client/project-board.js
@@ -865,8 +865,11 @@ export function ProjectMembersPanel({ project, rows, onClose } = {}) {
 }
 
 // #1864: one read for the whole board, exported so a test can prove the dossier comes from a single
-// `project-team` call. `read` is the channel seam (`call` in the app).
-export async function readProjectBoard(read, wanted) {
+// `project-team` call. `read` is the channel seam (`call` in the app). #1900: the dossier is the one
+// answer the poll hands back — `knownTeam` is what the open read — because the host builds it by
+// reading persona and memory files, and a five-second refresh must not pay that again. A refusal
+// leaves the rest of the board standing, so a dossier problem is never the empty-Project answer.
+export async function readProjectBoard(read, wanted, knownTeam) {
   const listing = await read('projects')
   const projects = Array.isArray(listing?.projects) ? listing.projects : []
   const project = wanted === '' ? projects[0] : projects.find(item => item.id === wanted)
@@ -878,7 +881,7 @@ export async function readProjectBoard(read, wanted) {
     read('project-read', { id: project.id }),
     read('project-board', { id: project.id, timeZone: zone }),
     read('tasks', {}),
-    read('project-team', { id: project.id }),
+    knownTeam !== undefined ? knownTeam : read('project-team', { id: project.id }).catch(() => null),
   ])
   const tasks = Array.isArray(taskList) ? taskList : (taskList?.tasks ?? [])
   // The groups are the same read as the rows, so the header cannot disagree with the cards.
@@ -950,12 +953,15 @@ export function ProjectBoardOverlay({ actions, call: request } = {}) {
     const wanted = hash.slice('#project'.length).replace(/^=/, '')
     let gone = false
     // #1864: the board, its record, its rows, the task texts and the team dossier are one read path,
-    // and the dossier comes from the single `project-team` call that read makes.
-    const loadBoard = () => readProjectBoard(read, wanted)
+    // and the dossier comes from the single `project-team` call that read makes. #1900: that call is
+    // this open's, not the poll's — `team` is handed back on every later read, so a tick re-reads
+    // only the three answers that change and the dossier is read again on the next board open.
+    let team
+    const loadBoard = () => readProjectBoard(read, wanted, team)
     const refresh = async (first) => {
       try {
         const next = await loadBoard()
-        if (!gone) setState(next)
+        if (!gone) { team = next.team; setState(next) }
       } catch {
         // The first read is the page's answer, so it takes the empty state it always took. A poll
         // that fails keeps the board the last good read drew (#1814): a board that vanishes under
diff --git a/patches/ds-bot/files/test/project-board-panels.test.js b/patches/ds-bot/files/test/project-board-panels.test.js
index 6f4a2de11..668dc8bbf 100644
--- a/patches/ds-bot/files/test/project-board-panels.test.js
+++ b/patches/ds-bot/files/test/project-board-panels.test.js
@@ -537,6 +537,68 @@ test('the board reads the dossier from exactly one project-team call', async ()
   assert.deepEqual(opened.map(entry => entry.botId), ['bot-chief'])
 })
 
+// #1900: the board re-reads itself every five seconds (#1814), and the team dossier rode that same
+// read, so an open board re-read persona and memory files — up to ~192 KB a minute — for an answer
+// only an edit changes. The dossier is read when the board opens; the poll hands back the answer it
+// already has, and `project-team` is not asked again.
+test('#1900: a poll re-reads the board and the task texts, not the team dossier', async () => {
+  resetSlots()
+  const calls = []
+  const read = async (endpoint) => {
+    calls.push(endpoint)
+    if (endpoint === 'projects') return { projects: [{ id: 'project-1', name: 'FlyBot', role: 'owner', choices: [] }] }
+    if (endpoint === 'project-read') return { project: projectRecord(), canManage: true }
+    if (endpoint === 'project-board') return { ...boardAnswer(), tasks: rows, done: [{ id: 'task-done', column: 'done', title: 'Finished' }] }
+    if (endpoint === 'tasks') return [{ id: 'task-1', title: 'Ship the poll' }]
+    if (endpoint === 'project-team') return { rows: [dossier(), null, { ...dossier(), botId: 'bot-dev', name: 'Dev' }] }
+    throw new Error(`unexpected endpoint ${endpoint}`)
+  }
+  const open = await readProjectBoard(read, 'project-1')
+  const poll = await readProjectBoard(read, 'project-1', open.team)
+  assert.equal(calls.filter(endpoint => endpoint === 'project-team').length, 1, 'the open reads the dossier once, and the poll does not ask again')
+  assert.equal(calls.filter(endpoint => endpoint === 'project-board').length, 2, 'the poll still re-reads the board, which is what it is for')
+  assert.deepEqual(poll.rows.map(row => row.id), ['task-1'], 'the poll keeps the rows it read')
+  assert.deepEqual(poll.done.map(row => row.id), ['task-done'], 'and the done group')
+  assert.deepEqual(poll.tasks.map(task => task.id), ['task-1'], 'and the task texts')
+  assert.deepEqual(poll.team.rows.map(row => row?.botId ?? null), ['bot-chief', null, 'bot-dev'], 'the one dossier answer survives whole, null row included')
+
+  // The block still draws its three rows, and the panel its three sections, from that one answer.
+  const tree = render(ProjectBoardPane, { project: poll.project, rows: poll.rows, done: poll.done, tasks: poll.tasks, team: poll.team, canManage: true })
+  assert.deepEqual(all(tree).filter(node => node.props?.['data-team-role'] !== undefined).map(node => node.props['data-team-role']), ['chief', 'agent', 'pool'])
+  const drawn = text(render(ProjectDossierPanel, { row: poll.team.rows[0], label: 'Project Chief' }))
+  assert.match(drawn, /Persona/, 'Persona still draws from the one answer')
+  assert.match(drawn, /Project Chief of FlyBot/)
+  assert.match(drawn, /Memory/, 'Memory still draws from the one answer')
+  assert.match(drawn, /The Chief remembers the Project\./)
+  assert.match(drawn, /Skills/, 'Skills still draw from the one answer')
+  assert.match(drawn, /ship-it/)
+})
+
+// #1900: the same read path must not make a failing dossier fatal. The board's first paint used to
+// turn a thrown `project-team` into "No Project yet — create one.", which is the answer reserved for
+// a Project that really is absent; the rows, the done group and the tasks are a different answer.
+test('#1900: a refused dossier still draws rows, done and tasks, not the empty Project', async () => {
+  resetSlots()
+  const read = async (endpoint) => {
+    if (endpoint === 'projects') return { projects: [{ id: 'project-1', name: 'FlyBot' }] }
+    if (endpoint === 'project-read') return { project: projectRecord(), canManage: true }
+    if (endpoint === 'project-board') return { ...boardAnswer(), tasks: rows, done: [{ id: 'task-done', column: 'done', title: 'Finished' }] }
+    if (endpoint === 'tasks') return [{ id: 'task-1', title: 'Ship the poll' }]
+    if (endpoint === 'project-team') throw new Error('project-team: cannot read the memory of bot-chief')
+    throw new Error(`unexpected endpoint ${endpoint}`)
+  }
+  const state = await readProjectBoard(read, 'project-1')
+  assert.notEqual(state.project, null, 'a refused dossier is not the empty Project')
+  assert.equal(state.project.id, 'project-1')
+  assert.deepEqual(state.rows.map(row => row.id), ['task-1'], 'the rows still come back')
+  assert.deepEqual(state.done.map(row => row.id), ['task-done'], 'and the done group')
+  assert.deepEqual(state.tasks.map(task => task.id), ['task-1'], 'and the task texts')
+  assert.deepEqual(Array.from(state.team.rows), [], 'the team block reads empty instead of failing the page')
+  const drawn = all(render(ProjectBoardPane, { project: state.project, rows: state.rows, done: state.done, tasks: state.tasks, team: state.team, canManage: true })).map(text).join(' | ')
+  assert.match(drawn, /Ship the poll/, 'the board the reader gets still carries the tasks')
+  assert.doesNotMatch(drawn, /No Project yet/, 'and is not the create-a-Project page')
+})
+
 // #1892: the role pool is a rank list, not a Bot the board holds a dossier answer for.
 // `project-team` answers rows keyed by the Project's own Bots, so a pool click asked for a row the
 // host never sent and drew an empty panel. A pool entry now reads `@id` beside its rank; the Chief
diff --git a/patches/ds-bot/files/test/project-board-view.test.js b/patches/ds-bot/files/test/project-board-view.test.js
index c4310a890..4542a3c62 100644
--- a/patches/ds-bot/files/test/project-board-view.test.js
+++ b/patches/ds-bot/files/test/project-board-view.test.js
@@ -353,7 +353,9 @@ test('#1814: an open board reads on every tick, stops once a row opens its own b
   assert.match(textIn(tree), /Dev4 · stalled/, 'the board draws what the first read answered')
   const afterFirst = count.calls
   await tick()
-  assert.equal(count.calls, afterFirst + 5, 'an open board reads again on the next tick')
+  // #1900: a tick is four calls now — the listing, the record, the board and the task texts. The
+  // fifth, the team dossier, belongs to the open and is not re-read (see the #1900 test below).
+  assert.equal(count.calls, afterFirst + 4, 'an open board reads again on the next tick, without the dossier')
   // A row opens its own board: the hash names the task and this board stops drawing, so a tick that
   // lands before the cleanup must not read. This segment pins the unmount, not the predicate.
   const afterTick = count.calls
@@ -363,7 +365,7 @@ test('#1814: an open board reads on every tick, stops once a row opens its own b
   // Closing that board puts this one back in front: the next tick reads again.
   win.location.hash = '#project'
   await tick()
-  assert.equal(count.calls, afterTick + 5, 'closing the row’s board resumes the poll')
+  assert.equal(count.calls, afterTick + 4, 'closing the row’s board resumes the poll')
   // A hidden tab reads nothing either — this is the segment the named predicate is pinned by.
   const afterResume = count.calls
   doc.visibilityState = 'hidden'
@@ -371,7 +373,7 @@ test('#1814: an open board reads on every tick, stops once a row opens its own b
   assert.equal(count.calls, afterResume, 'no read in a hidden tab')
   doc.visibilityState = 'visible'
   await tick()
-  assert.equal(count.calls, afterResume + 5, 'a visible tab reads again on the next tick')
+  assert.equal(count.calls, afterResume + 4, 'a visible tab reads again on the next tick')
   // Close the board: the timer goes with it, so a tick afterwards reads nothing at all.
   const afterVisible = count.calls
   for (const off of cleanups) off()
@@ -380,6 +382,48 @@ test('#1814: an open board reads on every tick, stops once a row opens its own b
   assert.equal(count.calls, afterVisible, 'nothing reads after the board closed')
 })
 
+// #1900: the dossier is `project-team`, which the host answers by reading persona and memory files
+// and resending their heads — up to ~16 KB every 5 s, an answer that only an edit changes. The poll
+// is wanted (#1814); the dossier riding on it is not. One open reads it, and every tick after that
+// reads only what the board is polling for.
+test('#1900: an open board reads the dossier once, never on a tick', async () => {
+  resetClock()
+  win.location.hash = '#project'
+  const calls = []
+  const call = async (name) => {
+    calls.push(name)
+    if (name === 'projects') return { projects: [{ id: 'project-1', name: 'FlyBot' }] }
+    if (name === 'project-read') {
+      return { project: { id: 'project-1', name: 'FlyBot', chief: { botId: 'bot-chief' }, assistant: { botId: 'bot-assistant' }, roles: { maintainers: ['bot-dev'], members: [] } }, canManage: false }
+    }
+    if (name === 'project-board') return { tasks: rows, done: [], waiting: [], inflight: [], blocked: [], counts: null }
+    if (name === 'tasks') return [{ id: 'task-b1', title: 'Ship the poll' }]
+    if (name === 'project-team') {
+      return { rows: [{ botId: 'bot-chief', name: 'Project Chief', persona: 'You are the Project Chief of FlyBot.', memory: { head: 'The Chief remembers the Project.', topics: ['work'] }, skills: ['ship-it'] }] }
+    }
+    throw new Error(`unexpected endpoint ${name}`)
+  }
+  const count = (endpoint) => calls.filter(name => name === endpoint).length
+  const { tree, redraw } = await mount({ actions: {}, call })
+  assert.equal(count('project-team'), 1, 'opening the board reads the dossier once')
+  assert.equal(count('project-board'), 1, 'and the board once')
+  // The one answer still feeds the row and the panel the reader opens from it.
+  const control = all(tree).find(node => node.props?.['data-dossier-bot'] === 'bot-chief')
+  assert.ok(control, 'the Chief row carries its Dossier control from that answer')
+  control.props.onClick()
+  const drawn = all(redraw()).map(textOf).join(' | ')
+  assert.match(drawn, /Persona/)
+  assert.match(drawn, /You are the Project Chief of FlyBot\./)
+  assert.match(drawn, /Memory/)
+  assert.match(drawn, /The Chief remembers the Project\./)
+  assert.match(drawn, /Skills/)
+  assert.match(drawn, /ship-it/)
+  // Three ticks: the board is re-read each time, the dossier is not read again at all.
+  await tick(3)
+  assert.equal(count('project-team'), 1, 'three polls later the dossier has not been read again')
+  assert.equal(count('project-board'), 4, 'while the board itself is re-read on every tick')
+})
+
 test('#1814: a failing poll keeps the board the last good read drew', async () => {
   resetClock()
   win.location.hash = '#project'