diff --git a/services/jtype-core/src/lib.rs b/services/jtype-core/src/lib.rs
index 8e63021..6302137 100644
--- a/services/jtype-core/src/lib.rs
+++ b/services/jtype-core/src/lib.rs
@@ -1349,6 +1349,9 @@ pub struct BoardCardInfo {
     pub task_total: i64,
     pub icon: Option<String>,
     pub excerpt: Option<String>,
+    /// Full frontmatter key/values, so the board can surface user-defined custom
+    /// fields declared in the `.board` config without re-reading the file.
+    pub properties: HashMap<String, String>,
     /// Card slugs this card is blocked by (frontmatter `blocked_by`).
     pub blocked_by: Vec<String>,
     /// Card slugs this card blocks (frontmatter `blocks`).
@@ -1505,6 +1508,7 @@ fn scan_board_cards_inner(
                 task_total,
                 icon: fm.get("icon").cloned().filter(|v| !v.is_empty()),
                 excerpt: body_excerpt(&content),
+                properties: fm.clone(),
                 blocked_by: fm.get("blocked_by").map(|v| parse_card_links(v)).unwrap_or_default(),
                 blocks: fm.get("blocks").map(|v| parse_card_links(v)).unwrap_or_default(),
                 relates: fm.get("relates").map(|v| parse_card_links(v)).unwrap_or_default(),
diff --git a/services/jtype-web/frontend/src/pages/Kanban.tsx b/services/jtype-web/frontend/src/pages/Kanban.tsx
index d46e25d..c84630c 100644
--- a/services/jtype-web/frontend/src/pages/Kanban.tsx
+++ b/services/jtype-web/frontend/src/pages/Kanban.tsx
@@ -19,7 +19,7 @@ import {
 } from '../api'
 import { useConfirm, usePrompt } from '@shared/components/PromptDialogContext'
 import { BoardSurface, type BoardActions } from '@shared/components/board'
-import { countTasks, bodyExcerpt, type BoardViewCard, type BoardViewConfig } from '@shared/lib/board'
+import { countTasks, bodyExcerpt, pickCustomFields, type BoardViewCard, type BoardViewConfig } from '@shared/lib/board'
 import { useWorkspaceSocket } from '../hooks/useWorkspaceSocket'
 
 const VIEW_KEY = (boardId: string) => `kanban-view:${boardId}`
@@ -126,6 +126,9 @@ export function Kanban() {
       .filter(c => !c.archivedAt)
       .map(c => {
         const tasks = countTasks(c.description ?? '')
+        const propsObj = c.propertiesExtra && typeof c.propertiesExtra === 'object' ? (c.propertiesExtra as Record<string, unknown>) : {}
+        const propsStr: Record<string, string> = {}
+        for (const [k, v] of Object.entries(propsObj)) if (typeof v === 'string') propsStr[k] = v
         return {
           id: c.id,
           columnKey: c.columnId,
@@ -140,9 +143,10 @@ export function Kanban() {
           taskDone: tasks.done,
           taskTotal: tasks.total,
           excerpt: bodyExcerpt(c.description ?? ''),
+          custom: pickCustomFields(propsStr, view.fields),
         }
       })
-  }, [board, memberName])
+  }, [board, memberName, view.fields])
 
   const viewConfig: BoardViewConfig = useMemo(
     () =>
@@ -152,6 +156,7 @@ export function Kanban() {
             columns: board.columns.slice().sort((a, b) => a.position - b.position).map(c => ({ key: c.id, name: c.name, color: c.color, limit: c.wipLimit })),
             groupBy: (view.groupBy as BoardViewConfig['groupBy']) ?? 'status',
             viewType: view.viewType ?? 'board',
+            fields: view.fields,
             swimlaneBy: view.swimlaneBy,
             colorColumns: view.colorColumns,
             doneColumn: view.doneColumn,
@@ -247,10 +252,13 @@ export function Kanban() {
         if (patch.due !== undefined) body.dueAt = patch.due ? `${patch.due} 00:00:00` : null
         if (patch.tags !== undefined) body.labelIds = patch.tags.map(t => t.id).filter(Boolean) as string[]
         if (patch.notes !== undefined) body.description = patch.notes
-        if (patch.icon !== undefined) {
+        if (patch.icon !== undefined || patch.custom !== undefined) {
           const cur = raw.propertiesExtra && typeof raw.propertiesExtra === 'object' ? { ...(raw.propertiesExtra as Record<string, unknown>) } : {}
-          if (patch.icon) cur.icon = patch.icon
-          else delete cur.icon
+          if (patch.icon !== undefined) {
+            if (patch.icon) cur.icon = patch.icon
+            else delete cur.icon
+          }
+          if (patch.custom !== undefined) for (const [k, v] of Object.entries(patch.custom)) { if (v) cur[k] = v; else delete cur[k] }
           body.propertiesExtra = cur
         }
         try {
diff --git a/services/jtype-web/frontend/src/pages/WebBoardView.tsx b/services/jtype-web/frontend/src/pages/WebBoardView.tsx
index eb43797..93997e8 100644
--- a/services/jtype-web/frontend/src/pages/WebBoardView.tsx
+++ b/services/jtype-web/frontend/src/pages/WebBoardView.tsx
@@ -9,6 +9,7 @@ import {
   countTasks,
   parseLinks,
   parseTagList,
+  pickCustomFields,
   serializeLinks,
   slugify,
   type BoardViewCard,
@@ -25,6 +26,7 @@ type BoardConfigJSON = {
   doneColumn?: string
   colorColumns?: boolean
   viewType?: 'board' | 'table'
+  fields?: { key: string; label: string; type?: 'text' | 'number' | 'date' }[]
   swimlaneBy?: 'status' | 'priority' | 'assignee'
 }
 
@@ -95,6 +97,7 @@ export function WebBoardView({
           taskDone: tasks.done,
           taskTotal: tasks.total,
           excerpt: bodyExcerpt(fm.body),
+          custom: pickCustomFields(fm.data, cfg.fields),
           blockedBy: fm.data.blocked_by ? parseLinks(fm.data.blocked_by) : [],
           blocks: fm.data.blocks ? parseLinks(fm.data.blocks) : [],
           relates: fm.data.relates ? parseLinks(fm.data.relates) : [],
@@ -181,6 +184,7 @@ export function WebBoardView({
             doneColumn: config.doneColumn,
             colorColumns: config.colorColumns,
             viewType: config.viewType,
+            fields: config.fields,
             swimlaneBy: config.swimlaneBy as BoardViewConfig['swimlaneBy'],
             groupBy: (config.groupBy as BoardViewConfig['groupBy']) || 'status',
           }
@@ -222,6 +226,7 @@ export function WebBoardView({
         if (patch.due !== undefined) next.due = patch.due ?? ''
         if (patch.icon !== undefined) next.icon = patch.icon ?? ''
         if (patch.tags !== undefined) next.tags = patch.tags.map((t) => t.label).join(', ')
+        if (patch.custom !== undefined) for (const [k, v] of Object.entries(patch.custom)) next[k] = v ?? ''
         if (patch.blockedBy !== undefined) next.blocked_by = serializeLinks(patch.blockedBy)
         if (patch.blocks !== undefined) next.blocks = serializeLinks(patch.blocks)
         if (patch.relates !== undefined) next.relates = serializeLinks(patch.relates)
diff --git a/shared/components/board/BoardPeek.tsx b/shared/components/board/BoardPeek.tsx
index b48c897..73495a2 100644
--- a/shared/components/board/BoardPeek.tsx
+++ b/shared/components/board/BoardPeek.tsx
@@ -1,4 +1,4 @@
-import { useCallback, useEffect, useRef, useState } from "react";
+import { Fragment, useCallback, useEffect, useRef, useState } from "react";
 import { t } from "@lingui/core/macro";
 import { Trans } from "@lingui/react/macro";
 import { XMarkIcon, TrashIcon, ArrowsPointingOutIcon, EyeIcon, PencilSquareIcon, ChatBubbleLeftIcon, ClockIcon } from "@heroicons/react/24/outline";
@@ -6,7 +6,7 @@ import { renderToContainer } from "../../lib/markdown";
 import { PRIORITIES, type BoardViewCard } from "../../lib/board";
 import { fieldCls, EmojiField, ListboxSelect, TagMultiSelect } from "./controls";
 import type { BoardOption } from "./types";
-import type { BoardTag, BoardComment, BoardActivityEvent } from "../../lib/board";
+import type { BoardTag, BoardFieldDef, BoardComment, BoardActivityEvent } from "../../lib/board";
 
 /**
  * Side peek for editing a card without leaving the board. Platform-agnostic: it
@@ -18,6 +18,8 @@ export function BoardPeek({
   statusOptions,
   assigneeOptions,
   tagOptions,
+  fields,
+  onAddField,
   dependencyCards,
   loadNotes,
   loadComments,
@@ -34,6 +36,10 @@ export function BoardPeek({
   statusOptions: BoardOption[];
   assigneeOptions?: BoardOption[];
   tagOptions?: BoardTag[];
+  /** Board-level custom field definitions to render as editable inputs. */
+  fields?: BoardFieldDef[];
+  /** Add a new custom field to the board (collected inline). */
+  onAddField?: (label: string) => void;
   /** Sibling cards (excluding this one) offered as dependency targets. */
   dependencyCards?: { slug: string; title: string }[];
   loadNotes?: (id: string) => Promise<string>;
@@ -47,6 +53,7 @@ export function BoardPeek({
   onDelete: () => void;
   onOpenFull?: () => void;
 }) {
+  const [newField, setNewField] = useState("");
   const [draft, setDraft] = useState<BoardViewCard>(card);
   const [notes, setNotes] = useState(card.notes ?? "");
   const [mode, setMode] = useState<"write" | "preview">("write");
@@ -292,6 +299,41 @@ export function BoardPeek({
             />
           )}
 
+          {fields?.map((f) => (
+            <Fragment key={f.key}>
+              <span className="truncate text-xs text-brand-gray" title={f.label}>
+                {f.label}
+              </span>
+              <input
+                type={f.type === "number" ? "number" : f.type === "date" ? "date" : "text"}
+                className={fieldCls}
+                value={draft.custom?.[f.key] ?? ""}
+                onChange={(e) => setField({ custom: { ...(draft.custom ?? {}), [f.key]: e.target.value } }, f.type === "date" || f.type === "number")}
+              />
+            </Fragment>
+          ))}
+          {onAddField && (
+            <>
+              <span className="text-xs text-brand-gray" />
+              <form
+                onSubmit={(e) => {
+                  e.preventDefault();
+                  const label = newField.trim();
+                  if (label) {
+                    onAddField(label);
+                    setNewField("");
+                  }
+                }}
+              >
+                <input
+                  className={fieldCls}
+                  placeholder={t`+ Add field`}
+                  value={newField}
+                  onChange={(e) => setNewField(e.target.value)}
+                />
+              </form>
+            </>
+          )}
           {dependencyCards && (
             <>
               <span className="text-xs text-brand-gray">
diff --git a/shared/components/board/BoardSurface.tsx b/shared/components/board/BoardSurface.tsx
index fa51154..8127ddc 100644
--- a/shared/components/board/BoardSurface.tsx
+++ b/shared/components/board/BoardSurface.tsx
@@ -39,6 +39,8 @@ import {
   cardSlug,
   effectiveColumns,
   groupValueOf,
+  RESERVED_CARD_KEYS,
+  slugify,
   sortCards as sortCardsFn,
   todayStr,
   visibleCards as visibleCardsFn,
@@ -881,6 +883,19 @@ export function BoardSurface({
             statusOptions={config.columns.map((c) => ({ value: c.key, label: c.name }))}
             assigneeOptions={assigneeOptions}
             tagOptions={tagOptions}
+            fields={config.fields}
+            onAddField={(label) => {
+              // Seed with the reserved card keys so a custom field can never
+              // collide with (and clobber) a core frontmatter attribute.
+              const existing = new Set([...RESERVED_CARD_KEYS, ...(config.fields ?? []).map((f) => f.key)]);
+              let key = slugify(label);
+              if (existing.has(key)) {
+                let n = 2;
+                while (existing.has(`${key}-${n}`)) n += 1;
+                key = `${key}-${n}`;
+              }
+              void actions.setConfig({ fields: [...(config.fields ?? []), { key, label }] });
+            }}
             dependencyCards={cards.filter((c) => c.id !== selected.id).map((c) => ({ slug: cardSlug(c), title: c.title }))}
             loadNotes={loadNotes}
             loadComments={loadComments}
diff --git a/shared/i18n/locales/en/messages.mjs b/shared/i18n/locales/en/messages.mjs
index 61065a5..33ca39f 100644
--- a/shared/i18n/locales/en/messages.mjs
+++ b/shared/i18n/locales/en/messages.mjs
@@ -1 +1 @@
-/*eslint-disable*/export const messages=JSON.parse("{\"--lIxB\":[\"Blocked by\"],\"-b7T3G\":[\"Updated\"],\"1DBGsz\":[\"Notes\"],\"1YABGm\":[\"Link (Ctrl+K)\"],\"1hKEom\":[\"Priority\"],\"2wxgft\":[\"Rename\"],\"3qkggm\":[\"Fullscreen\"],\"4gdyen\":[\"Local (yours)\"],\"4hJhzz\":[\"Table\"],\"54sFiP\":[\"flowchart TD\\n  A[Start] --> B[End]\"],\"5Q_DQ6\":[\"Inline Code\"],\"7VpPHA\":[\"Confirm\"],\"7s3WlU\":[\"Blocks\"],\"8PifYj\":[\"Mermaid diagram\"],\"8hSn0h\":[\"Result (editable)\"],\"8lE269\":[\"Sort: Manual\"],\"9gxam6\":[\"Could not render this Draw.io diagram.\"],\"AC9Gkf\":[\"Expand column\"],\"AS5WO9\":[\"Could not render this PDF.\"],\"AVreQ5\":[\"Drag to resize\"],\"AgvHni\":[\"Add column\"],\"AxAubu\":[\"Group: Assignee\"],\"BfMZ7w\":[\"Accept cloud\"],\"BnmEvM\":[\"Save as template\"],\"C6-ZRl\":[\"Someone\"],\"EWPtMO\":[\"Code\"],\"EbMPZJ\":[\"Unassigned\"],\"G4qrLy\":[\"Unset done column\"],\"GKu3m4\":[\"No labels\"],\"Gpfctt\":[\"Due\"],\"H_SQFv\":[\"No color\"],\"I6SWEy\":[\"Split\"],\"ICip_B\":[\"Cloud (remote)\"],\"Ik60OC\":[\"Open in editor\"],\"Iw6WJa\":[\"Set WIP limit\"],\"JTYvAw\":[\"Search cards\"],\"K_F6pa\":[\"Saving…\"],\"KjXDqG\":[\"Swimlane: None\"],\"KmydK6\":[\"Bold\"],\"KvW1VO\":[\"Draw.io diagram\"],\"LQn6-8\":[\"Accept local\"],\"MHrjPM\":[\"Title\"],\"Mm72la\":[\"No comments yet\"],\"NBdIgR\":[\"Comment\"],\"OYHzN1\":[\"Tags\"],\"OepdfE\":[\"Group: Status\"],\"Q2mGA7\":[\"Clear filter\"],\"QD8opX\":[\"Board\"],\"QlsPZy\":[\"Write Mermaid syntax to see the diagram.\"],\"S5Qbb1\":[\"comma, separated\"],\"TdfEV7\":[\"Archived\"],\"UQOvxZ\":[\"Blank card\"],\"VNa_N2\":[\"This file type can not be previewed yet.\"],\"VbyRUy\":[\"Comments\"],\"WSP6v1\":[\"Sort: Priority\"],\"X03-eC\":[\"Please enter a value.\"],\"XJOV1Y\":[\"Activity\"],\"Ya7bZl\":[\"Diagram error\"],\"Zot9XS\":[\"No cards\"],\"_5CsXX\":[\"Done column\"],\"_EsjyQ\":[\"Use this\"],\"a6uhHr\":[\"Bold (Ctrl+B)\"],\"aDvLhk\":[\"Add a comment…\"],\"abUZlY\":[\"Add details...\"],\"agOeRN\":[\"Could not render this API specification.\"],\"b4hVKD\":[\"Color columns\"],\"cfaWH-\":[\"Add labels\"],\"cnGeoo\":[\"Delete\"],\"d-F6q9\":[\"Created\"],\"d5z6xQ\":[\"WIP limit \",[\"0\"]],\"dEgA5A\":[\"Cancel\"],\"euc6Ns\":[\"Duplicate\"],\"fYcKtB\":[\"Sort: Due\"],\"gLDJuJ\":[\"Untitled card\"],\"hh4sEG\":[\"Relates\"],\"hnK1gR\":[\"PDF document\"],\"i4_LY_\":[\"Write\"],\"iTylMl\":[\"Templates\"],\"iYVqZq\":[\"Column name\"],\"jUbC3Z\":[\"Swimlane: Priority\"],\"jZlrte\":[\"Color\"],\"kZlRKE\":[\"Mermaid source\"],\"kryGs-\":[\"Card\"],\"lCF0wC\":[\"Refresh\"],\"lHxVTh\":[\"Swimlane: Assignee\"],\"ltF1xa\":[\"Save merged result\"],\"nabda1\":[\"Delete card\"],\"njJFtc\":[\"Delete comment\"],\"o7J4JM\":[\"Filter\"],\"o8va6N\":[\"Restored\"],\"ojKCLU\":[\"Assignee\"],\"p9yTeb\":[\"Sort: Title\"],\"pKztsX\":[\"Open in full editor\"],\"pnrmSP\":[\"New card\"],\"pwN6Ae\":[\"Collapse column\"],\"pzutoc\":[\"Italic\"],\"rdUucN\":[\"Preview\"],\"sCzmvQ\":[\"cards\"],\"sQpDn6\":[\"Exit fullscreen\"],\"tK2x9T\":[\"⚠ \",[\"0\"],\" Conflict\",[\"1\"],\" to Resolve\"],\"u2IprG\":[\"Card title (Enter to add, Esc to cancel)\"],\"uAQUqI\":[\"Status\"],\"ucJg3u\":[\"Swimlane: Status\"],\"wf6Djn\":[\"Italic (Ctrl+I)\"],\"wtw-au\":[\"Set as done column\"],\"wwu18a\":[\"Icon\"],\"x52RAh\":[\"Blocked by \",[\"blockedCount\"],\" unfinished card(s)\"],\"y1eoq1\":[\"Copy link\"],\"y9cj46\":[\"Group: Priority\"],\"ybGQtY\":[\"← Back to list\"],\"yz7wBu\":[\"Close\"],\"yzF66j\":[\"Link\"],\"zOc0vf\":[\"No icon\"],\"zga9sT\":[\"OK\"]}");
\ No newline at end of file
+/*eslint-disable*/export const messages=JSON.parse("{\"--lIxB\":[\"Blocked by\"],\"-b7T3G\":[\"Updated\"],\"1DBGsz\":[\"Notes\"],\"1YABGm\":[\"Link (Ctrl+K)\"],\"1hKEom\":[\"Priority\"],\"2wxgft\":[\"Rename\"],\"3qkggm\":[\"Fullscreen\"],\"4gdyen\":[\"Local (yours)\"],\"4hJhzz\":[\"Table\"],\"54sFiP\":[\"flowchart TD\\n  A[Start] --> B[End]\"],\"5Q_DQ6\":[\"Inline Code\"],\"7VpPHA\":[\"Confirm\"],\"7s3WlU\":[\"Blocks\"],\"8PifYj\":[\"Mermaid diagram\"],\"8hSn0h\":[\"Result (editable)\"],\"8lE269\":[\"Sort: Manual\"],\"9gxam6\":[\"Could not render this Draw.io diagram.\"],\"AC9Gkf\":[\"Expand column\"],\"AS5WO9\":[\"Could not render this PDF.\"],\"AVreQ5\":[\"Drag to resize\"],\"AgvHni\":[\"Add column\"],\"AxAubu\":[\"Group: Assignee\"],\"BfMZ7w\":[\"Accept cloud\"],\"BnmEvM\":[\"Save as template\"],\"C6-ZRl\":[\"Someone\"],\"EWPtMO\":[\"Code\"],\"EbMPZJ\":[\"Unassigned\"],\"G4qrLy\":[\"Unset done column\"],\"GKu3m4\":[\"No labels\"],\"Gpfctt\":[\"Due\"],\"H_SQFv\":[\"No color\"],\"I6SWEy\":[\"Split\"],\"ICip_B\":[\"Cloud (remote)\"],\"Ik60OC\":[\"Open in editor\"],\"Iw6WJa\":[\"Set WIP limit\"],\"JTYvAw\":[\"Search cards\"],\"K_F6pa\":[\"Saving…\"],\"KjXDqG\":[\"Swimlane: None\"],\"KmydK6\":[\"Bold\"],\"KvW1VO\":[\"Draw.io diagram\"],\"LQn6-8\":[\"Accept local\"],\"MHrjPM\":[\"Title\"],\"Mm72la\":[\"No comments yet\"],\"NBdIgR\":[\"Comment\"],\"OYHzN1\":[\"Tags\"],\"OepdfE\":[\"Group: Status\"],\"Q2mGA7\":[\"Clear filter\"],\"QD8opX\":[\"Board\"],\"QlsPZy\":[\"Write Mermaid syntax to see the diagram.\"],\"S5Qbb1\":[\"comma, separated\"],\"TdfEV7\":[\"Archived\"],\"UQOvxZ\":[\"Blank card\"],\"VNa_N2\":[\"This file type can not be previewed yet.\"],\"VbyRUy\":[\"Comments\"],\"WSP6v1\":[\"Sort: Priority\"],\"X03-eC\":[\"Please enter a value.\"],\"XJOV1Y\":[\"Activity\"],\"Ya7bZl\":[\"Diagram error\"],\"Zot9XS\":[\"No cards\"],\"_5CsXX\":[\"Done column\"],\"_EsjyQ\":[\"Use this\"],\"a6uhHr\":[\"Bold (Ctrl+B)\"],\"aDvLhk\":[\"Add a comment…\"],\"abUZlY\":[\"Add details...\"],\"agOeRN\":[\"Could not render this API specification.\"],\"b4hVKD\":[\"Color columns\"],\"cfaWH-\":[\"Add labels\"],\"cnGeoo\":[\"Delete\"],\"d-F6q9\":[\"Created\"],\"d5z6xQ\":[\"WIP limit \",[\"0\"]],\"dEgA5A\":[\"Cancel\"],\"euc6Ns\":[\"Duplicate\"],\"fYcKtB\":[\"Sort: Due\"],\"gLDJuJ\":[\"Untitled card\"],\"hh4sEG\":[\"Relates\"],\"hnK1gR\":[\"PDF document\"],\"i4_LY_\":[\"Write\"],\"iTylMl\":[\"Templates\"],\"iYVqZq\":[\"Column name\"],\"jUbC3Z\":[\"Swimlane: Priority\"],\"jZlrte\":[\"Color\"],\"kZlRKE\":[\"Mermaid source\"],\"kryGs-\":[\"Card\"],\"lCF0wC\":[\"Refresh\"],\"lHxVTh\":[\"Swimlane: Assignee\"],\"ltF1xa\":[\"Save merged result\"],\"nabda1\":[\"Delete card\"],\"njJFtc\":[\"Delete comment\"],\"o7J4JM\":[\"Filter\"],\"o8va6N\":[\"Restored\"],\"ojKCLU\":[\"Assignee\"],\"p9yTeb\":[\"Sort: Title\"],\"pKztsX\":[\"Open in full editor\"],\"pnrmSP\":[\"New card\"],\"pwN6Ae\":[\"Collapse column\"],\"pzutoc\":[\"Italic\"],\"rdUucN\":[\"Preview\"],\"sCzmvQ\":[\"cards\"],\"sQpDn6\":[\"Exit fullscreen\"],\"tK2x9T\":[\"⚠ \",[\"0\"],\" Conflict\",[\"1\"],\" to Resolve\"],\"u2IprG\":[\"Card title (Enter to add, Esc to cancel)\"],\"uAQUqI\":[\"Status\"],\"ucJg3u\":[\"Swimlane: Status\"],\"wf6Djn\":[\"Italic (Ctrl+I)\"],\"wtw-au\":[\"Set as done column\"],\"wwu18a\":[\"Icon\"],\"x52RAh\":[\"Blocked by \",[\"blockedCount\"],\" unfinished card(s)\"],\"y1eoq1\":[\"Copy link\"],\"y9cj46\":[\"Group: Priority\"],\"yEbJGs\":[\"+ Add field\"],\"ybGQtY\":[\"← Back to list\"],\"yz7wBu\":[\"Close\"],\"yzF66j\":[\"Link\"],\"zOc0vf\":[\"No icon\"],\"zga9sT\":[\"OK\"]}");
\ No newline at end of file
diff --git a/shared/i18n/locales/en/messages.po b/shared/i18n/locales/en/messages.po
index 3fb7745..1c18c4f 100644
--- a/shared/i18n/locales/en/messages.po
+++ b/shared/i18n/locales/en/messages.po
@@ -22,6 +22,10 @@ msgstr ""
 msgid "← Back to list"
 msgstr "← Back to list"
 
+#: shared/components/board/BoardPeek.tsx
+msgid "+ Add field"
+msgstr "+ Add field"
+
 #. placeholder {0}: conflicts.length
 #. placeholder {1}: conflicts.length > 1 ? "s" : ""
 #: shared/components/ConflictResolver.tsx
diff --git a/shared/i18n/locales/ja/messages.mjs b/shared/i18n/locales/ja/messages.mjs
index dfbac1b..b694198 100644
--- a/shared/i18n/locales/ja/messages.mjs
+++ b/shared/i18n/locales/ja/messages.mjs
@@ -1 +1 @@
-/*eslint-disable*/export const messages=JSON.parse("{\"--lIxB\":[\"Blocked by\"],\"-b7T3G\":[\"Updated\"],\"1DBGsz\":[\"ノート\"],\"1YABGm\":[\"リンク (Ctrl+K)\"],\"1hKEom\":[\"優先度\"],\"2wxgft\":[\"名前を変更\"],\"3qkggm\":[\"全画面表示\"],\"4gdyen\":[\"ローカル（自分の）\"],\"4hJhzz\":[\"表\"],\"54sFiP\":[\"flowchart TD\\n  A[開始] --> B[終了]\"],\"5Q_DQ6\":[\"インラインコード\"],\"7VpPHA\":[\"確認\"],\"7s3WlU\":[\"Blocks\"],\"8PifYj\":[\"Mermaid 図\"],\"8hSn0h\":[\"結果（編集可能）\"],\"8lE269\":[\"並べ替え：手動\"],\"9gxam6\":[\"この Draw.io 図をレンダリングできませんでした。\"],\"AC9Gkf\":[\"列を展開\"],\"AS5WO9\":[\"この PDF をレンダリングできませんでした。\"],\"AVreQ5\":[\"ドラッグしてサイズ変更\"],\"AgvHni\":[\"列を追加\"],\"AxAubu\":[\"グループ：担当者\"],\"BfMZ7w\":[\"クラウドを採用\"],\"BnmEvM\":[\"テンプレートとして保存\"],\"C6-ZRl\":[\"Someone\"],\"EWPtMO\":[\"コード\"],\"EbMPZJ\":[\"未割り当て\"],\"G4qrLy\":[\"完了列を解除\"],\"GKu3m4\":[\"ラベルなし\"],\"Gpfctt\":[\"期限\"],\"H_SQFv\":[\"色なし\"],\"I6SWEy\":[\"分割\"],\"ICip_B\":[\"クラウド（リモート）\"],\"Ik60OC\":[\"エディターで開く\"],\"Iw6WJa\":[\"WIP 制限を設定\"],\"JTYvAw\":[\"カードを検索\"],\"K_F6pa\":[\"保存中…\"],\"KjXDqG\":[\"Swimlane: None\"],\"KmydK6\":[\"太字\"],\"KvW1VO\":[\"Draw.io 図\"],\"LQn6-8\":[\"ローカルを採用\"],\"MHrjPM\":[\"タイトル\"],\"Mm72la\":[\"No comments yet\"],\"NBdIgR\":[\"Comment\"],\"OYHzN1\":[\"タグ\"],\"OepdfE\":[\"グループ：ステータス\"],\"Q2mGA7\":[\"フィルターをクリア\"],\"QD8opX\":[\"ボード\"],\"QlsPZy\":[\"Mermaid 構文を書くと図が表示されます。\"],\"S5Qbb1\":[\"カンマ区切り\"],\"TdfEV7\":[\"Archived\"],\"UQOvxZ\":[\"空のカード\"],\"VNa_N2\":[\"このファイル形式はまだプレビューできません。\"],\"VbyRUy\":[\"Comments\"],\"WSP6v1\":[\"並べ替え：優先度\"],\"X03-eC\":[\"値を入力してください。\"],\"XJOV1Y\":[\"Activity\"],\"Ya7bZl\":[\"図のエラー\"],\"Zot9XS\":[\"カードなし\"],\"_5CsXX\":[\"完了列\"],\"_EsjyQ\":[\"これを使用\"],\"a6uhHr\":[\"太字 (Ctrl+B)\"],\"aDvLhk\":[\"Add a comment…\"],\"abUZlY\":[\"詳細を追加...\"],\"agOeRN\":[\"この API 仕様をレンダリングできませんでした。\"],\"b4hVKD\":[\"色付き列\"],\"cfaWH-\":[\"ラベルを追加\"],\"cnGeoo\":[\"削除\"],\"d-F6q9\":[\"Created\"],\"d5z6xQ\":[\"WIP 制限 \",[\"0\"]],\"dEgA5A\":[\"キャンセル\"],\"euc6Ns\":[\"複製\"],\"fYcKtB\":[\"並べ替え：期限\"],\"gLDJuJ\":[\"無題のカード\"],\"hh4sEG\":[\"Relates\"],\"hnK1gR\":[\"PDF ドキュメント\"],\"i4_LY_\":[\"記述\"],\"iTylMl\":[\"テンプレート\"],\"iYVqZq\":[\"列名\"],\"jUbC3Z\":[\"Swimlane: Priority\"],\"jZlrte\":[\"カラー\"],\"kZlRKE\":[\"Mermaid ソース\"],\"kryGs-\":[\"カード\"],\"lCF0wC\":[\"更新\"],\"lHxVTh\":[\"Swimlane: Assignee\"],\"ltF1xa\":[\"マージ結果を保存\"],\"nabda1\":[\"カードを削除\"],\"njJFtc\":[\"Delete comment\"],\"o7J4JM\":[\"フィルター\"],\"o8va6N\":[\"Restored\"],\"ojKCLU\":[\"担当者\"],\"p9yTeb\":[\"並べ替え：タイトル\"],\"pKztsX\":[\"フルエディターで開く\"],\"pnrmSP\":[\"新規カード\"],\"pwN6Ae\":[\"列を折りたたむ\"],\"pzutoc\":[\"イタリック\"],\"rdUucN\":[\"プレビュー\"],\"sCzmvQ\":[\"枚のカード\"],\"sQpDn6\":[\"全画面表示を終了\"],\"tK2x9T\":[\"⚠ \",[\"0\"],\" 件の競合\",[\"1\"],\"を解決中\"],\"u2IprG\":[\"カードのタイトル（Enter で追加、Esc でキャンセル）\"],\"uAQUqI\":[\"ステータス\"],\"ucJg3u\":[\"Swimlane: Status\"],\"wf6Djn\":[\"イタリック (Ctrl+I)\"],\"wtw-au\":[\"完了列に設定\"],\"wwu18a\":[\"アイコン\"],\"x52RAh\":[\"Blocked by \",[\"blockedCount\"],\" unfinished card(s)\"],\"y1eoq1\":[\"リンクをコピー\"],\"y9cj46\":[\"グループ：優先度\"],\"ybGQtY\":[\"← リストに戻る\"],\"yz7wBu\":[\"閉じる\"],\"yzF66j\":[\"リンク\"],\"zOc0vf\":[\"アイコンなし\"],\"zga9sT\":[\"OK\"]}");
\ No newline at end of file
+/*eslint-disable*/export const messages=JSON.parse("{\"--lIxB\":[\"Blocked by\"],\"-b7T3G\":[\"Updated\"],\"1DBGsz\":[\"ノート\"],\"1YABGm\":[\"リンク (Ctrl+K)\"],\"1hKEom\":[\"優先度\"],\"2wxgft\":[\"名前を変更\"],\"3qkggm\":[\"全画面表示\"],\"4gdyen\":[\"ローカル（自分の）\"],\"4hJhzz\":[\"表\"],\"54sFiP\":[\"flowchart TD\\n  A[開始] --> B[終了]\"],\"5Q_DQ6\":[\"インラインコード\"],\"7VpPHA\":[\"確認\"],\"7s3WlU\":[\"Blocks\"],\"8PifYj\":[\"Mermaid 図\"],\"8hSn0h\":[\"結果（編集可能）\"],\"8lE269\":[\"並べ替え：手動\"],\"9gxam6\":[\"この Draw.io 図をレンダリングできませんでした。\"],\"AC9Gkf\":[\"列を展開\"],\"AS5WO9\":[\"この PDF をレンダリングできませんでした。\"],\"AVreQ5\":[\"ドラッグしてサイズ変更\"],\"AgvHni\":[\"列を追加\"],\"AxAubu\":[\"グループ：担当者\"],\"BfMZ7w\":[\"クラウドを採用\"],\"BnmEvM\":[\"テンプレートとして保存\"],\"C6-ZRl\":[\"Someone\"],\"EWPtMO\":[\"コード\"],\"EbMPZJ\":[\"未割り当て\"],\"G4qrLy\":[\"完了列を解除\"],\"GKu3m4\":[\"ラベルなし\"],\"Gpfctt\":[\"期限\"],\"H_SQFv\":[\"色なし\"],\"I6SWEy\":[\"分割\"],\"ICip_B\":[\"クラウド（リモート）\"],\"Ik60OC\":[\"エディターで開く\"],\"Iw6WJa\":[\"WIP 制限を設定\"],\"JTYvAw\":[\"カードを検索\"],\"K_F6pa\":[\"保存中…\"],\"KjXDqG\":[\"Swimlane: None\"],\"KmydK6\":[\"太字\"],\"KvW1VO\":[\"Draw.io 図\"],\"LQn6-8\":[\"ローカルを採用\"],\"MHrjPM\":[\"タイトル\"],\"Mm72la\":[\"No comments yet\"],\"NBdIgR\":[\"Comment\"],\"OYHzN1\":[\"タグ\"],\"OepdfE\":[\"グループ：ステータス\"],\"Q2mGA7\":[\"フィルターをクリア\"],\"QD8opX\":[\"ボード\"],\"QlsPZy\":[\"Mermaid 構文を書くと図が表示されます。\"],\"S5Qbb1\":[\"カンマ区切り\"],\"TdfEV7\":[\"Archived\"],\"UQOvxZ\":[\"空のカード\"],\"VNa_N2\":[\"このファイル形式はまだプレビューできません。\"],\"VbyRUy\":[\"Comments\"],\"WSP6v1\":[\"並べ替え：優先度\"],\"X03-eC\":[\"値を入力してください。\"],\"XJOV1Y\":[\"Activity\"],\"Ya7bZl\":[\"図のエラー\"],\"Zot9XS\":[\"カードなし\"],\"_5CsXX\":[\"完了列\"],\"_EsjyQ\":[\"これを使用\"],\"a6uhHr\":[\"太字 (Ctrl+B)\"],\"aDvLhk\":[\"Add a comment…\"],\"abUZlY\":[\"詳細を追加...\"],\"agOeRN\":[\"この API 仕様をレンダリングできませんでした。\"],\"b4hVKD\":[\"色付き列\"],\"cfaWH-\":[\"ラベルを追加\"],\"cnGeoo\":[\"削除\"],\"d-F6q9\":[\"Created\"],\"d5z6xQ\":[\"WIP 制限 \",[\"0\"]],\"dEgA5A\":[\"キャンセル\"],\"euc6Ns\":[\"複製\"],\"fYcKtB\":[\"並べ替え：期限\"],\"gLDJuJ\":[\"無題のカード\"],\"hh4sEG\":[\"Relates\"],\"hnK1gR\":[\"PDF ドキュメント\"],\"i4_LY_\":[\"記述\"],\"iTylMl\":[\"テンプレート\"],\"iYVqZq\":[\"列名\"],\"jUbC3Z\":[\"Swimlane: Priority\"],\"jZlrte\":[\"カラー\"],\"kZlRKE\":[\"Mermaid ソース\"],\"kryGs-\":[\"カード\"],\"lCF0wC\":[\"更新\"],\"lHxVTh\":[\"Swimlane: Assignee\"],\"ltF1xa\":[\"マージ結果を保存\"],\"nabda1\":[\"カードを削除\"],\"njJFtc\":[\"Delete comment\"],\"o7J4JM\":[\"フィルター\"],\"o8va6N\":[\"Restored\"],\"ojKCLU\":[\"担当者\"],\"p9yTeb\":[\"並べ替え：タイトル\"],\"pKztsX\":[\"フルエディターで開く\"],\"pnrmSP\":[\"新規カード\"],\"pwN6Ae\":[\"列を折りたたむ\"],\"pzutoc\":[\"イタリック\"],\"rdUucN\":[\"プレビュー\"],\"sCzmvQ\":[\"枚のカード\"],\"sQpDn6\":[\"全画面表示を終了\"],\"tK2x9T\":[\"⚠ \",[\"0\"],\" 件の競合\",[\"1\"],\"を解決中\"],\"u2IprG\":[\"カードのタイトル（Enter で追加、Esc でキャンセル）\"],\"uAQUqI\":[\"ステータス\"],\"ucJg3u\":[\"Swimlane: Status\"],\"wf6Djn\":[\"イタリック (Ctrl+I)\"],\"wtw-au\":[\"完了列に設定\"],\"wwu18a\":[\"アイコン\"],\"x52RAh\":[\"Blocked by \",[\"blockedCount\"],\" unfinished card(s)\"],\"y1eoq1\":[\"リンクをコピー\"],\"y9cj46\":[\"グループ：優先度\"],\"yEbJGs\":[\"+ Add field\"],\"ybGQtY\":[\"← リストに戻る\"],\"yz7wBu\":[\"閉じる\"],\"yzF66j\":[\"リンク\"],\"zOc0vf\":[\"アイコンなし\"],\"zga9sT\":[\"OK\"]}");
\ No newline at end of file
diff --git a/shared/i18n/locales/ja/messages.po b/shared/i18n/locales/ja/messages.po
index 3b288ea..a1f8e10 100644
--- a/shared/i18n/locales/ja/messages.po
+++ b/shared/i18n/locales/ja/messages.po
@@ -22,6 +22,10 @@ msgstr ""
 msgid "← Back to list"
 msgstr "← リストに戻る"
 
+#: shared/components/board/BoardPeek.tsx
+msgid "+ Add field"
+msgstr ""
+
 #. placeholder {0}: conflicts.length
 #. placeholder {1}: conflicts.length > 1 ? "s" : ""
 #: shared/components/ConflictResolver.tsx
diff --git a/shared/i18n/locales/ko/messages.mjs b/shared/i18n/locales/ko/messages.mjs
index 87a7662..059685b 100644
--- a/shared/i18n/locales/ko/messages.mjs
+++ b/shared/i18n/locales/ko/messages.mjs
@@ -1 +1 @@
-/*eslint-disable*/export const messages=JSON.parse("{\"--lIxB\":[\"Blocked by\"],\"-b7T3G\":[\"Updated\"],\"1DBGsz\":[\"노트\"],\"1YABGm\":[\"링크 (Ctrl+K)\"],\"1hKEom\":[\"우선순위\"],\"2wxgft\":[\"이름 변경\"],\"3qkggm\":[\"전체 화면\"],\"4gdyen\":[\"로컈 (내 것)\"],\"4hJhzz\":[\"테이블\"],\"54sFiP\":[\"flowchart TD\\n  A[시작] --> B[끝]\"],\"5Q_DQ6\":[\"인라인 코드\"],\"7VpPHA\":[\"확인\"],\"7s3WlU\":[\"Blocks\"],\"8PifYj\":[\"Mermaid 다이어그램\"],\"8hSn0h\":[\"결과 (편집 가능)\"],\"8lE269\":[\"정렬: 수동\"],\"9gxam6\":[\"이 Draw.io 다이어그램을 렌더링할 수 없습니다.\"],\"AC9Gkf\":[\"열 펼치기\"],\"AS5WO9\":[\"이 PDF를 렌더링할 수 없습니다.\"],\"AVreQ5\":[\"드래그하여 크기 조정\"],\"AgvHni\":[\"열 추가\"],\"AxAubu\":[\"그룹: 담당자\"],\"BfMZ7w\":[\"클라우드 수낙\"],\"BnmEvM\":[\"템플릿으로 저장\"],\"C6-ZRl\":[\"Someone\"],\"EWPtMO\":[\"코드\"],\"EbMPZJ\":[\"미할당\"],\"G4qrLy\":[\"완료 열 해제\"],\"GKu3m4\":[\"라벨 없음\"],\"Gpfctt\":[\"마감\"],\"H_SQFv\":[\"색상 없음\"],\"I6SWEy\":[\"스플릿\"],\"ICip_B\":[\"클라우드 (원격)\"],\"Ik60OC\":[\"에디터에서 열기\"],\"Iw6WJa\":[\"WIP 한도 설정\"],\"JTYvAw\":[\"카드 검색\"],\"K_F6pa\":[\"저장 중…\"],\"KjXDqG\":[\"Swimlane: None\"],\"KmydK6\":[\"굵게\"],\"KvW1VO\":[\"Draw.io 다이어그램\"],\"LQn6-8\":[\"로컈 수낙\"],\"MHrjPM\":[\"제목\"],\"Mm72la\":[\"No comments yet\"],\"NBdIgR\":[\"Comment\"],\"OYHzN1\":[\"태그\"],\"OepdfE\":[\"그룹: 상태\"],\"Q2mGA7\":[\"필터 지우기\"],\"QD8opX\":[\"보드\"],\"QlsPZy\":[\"Mermaid 구문을 작성하면 다이어그램이 표시됩니다.\"],\"S5Qbb1\":[\"쉼표로 구분\"],\"TdfEV7\":[\"Archived\"],\"UQOvxZ\":[\"빈 카드\"],\"VNa_N2\":[\"이 파일 형식은 아직 미리볼 수 없습니다.\"],\"VbyRUy\":[\"Comments\"],\"WSP6v1\":[\"정렬: 우선순위\"],\"X03-eC\":[\"값을 입력해 주세요.\"],\"XJOV1Y\":[\"Activity\"],\"Ya7bZl\":[\"다이어그램 오류\"],\"Zot9XS\":[\"카드 없음\"],\"_5CsXX\":[\"완료 열\"],\"_EsjyQ\":[\"이것 사용\"],\"a6uhHr\":[\"굵게 (Ctrl+B)\"],\"aDvLhk\":[\"Add a comment…\"],\"abUZlY\":[\"세부정보 추가...\"],\"agOeRN\":[\"이 API 명세를 렌더링할 수 없습니다.\"],\"b4hVKD\":[\"색상 열\"],\"cfaWH-\":[\"라벨 추가\"],\"cnGeoo\":[\"삭제\"],\"d-F6q9\":[\"Created\"],\"d5z6xQ\":[\"WIP 한도 \",[\"0\"]],\"dEgA5A\":[\"취소\"],\"euc6Ns\":[\"복제\"],\"fYcKtB\":[\"정렬: 마감\"],\"gLDJuJ\":[\"제목 없는 카드\"],\"hh4sEG\":[\"Relates\"],\"hnK1gR\":[\"PDF 문서\"],\"i4_LY_\":[\"작성\"],\"iTylMl\":[\"템플릿\"],\"iYVqZq\":[\"열 이름\"],\"jUbC3Z\":[\"Swimlane: Priority\"],\"jZlrte\":[\"색상\"],\"kZlRKE\":[\"Mermaid 소스\"],\"kryGs-\":[\"카드\"],\"lCF0wC\":[\"새로고침\"],\"lHxVTh\":[\"Swimlane: Assignee\"],\"ltF1xa\":[\"병합 결과 저장\"],\"nabda1\":[\"카드 삭제\"],\"njJFtc\":[\"Delete comment\"],\"o7J4JM\":[\"필터\"],\"o8va6N\":[\"Restored\"],\"ojKCLU\":[\"담당자\"],\"p9yTeb\":[\"정렬: 제목\"],\"pKztsX\":[\"전체 에디터에서 열기\"],\"pnrmSP\":[\"새 카드\"],\"pwN6Ae\":[\"열 접기\"],\"pzutoc\":[\"기울임꼴\"],\"rdUucN\":[\"미리보기\"],\"sCzmvQ\":[\"개 카드\"],\"sQpDn6\":[\"전체 화면 종료\"],\"tK2x9T\":[\"⚠ 해결할 충돌 \",[\"0\"],\"건\",[\"1\"]],\"u2IprG\":[\"카드 제목 (Enter로 추가, Esc로 취소)\"],\"uAQUqI\":[\"상태\"],\"ucJg3u\":[\"Swimlane: Status\"],\"wf6Djn\":[\"기울임꼴 (Ctrl+I)\"],\"wtw-au\":[\"완료 열로 설정\"],\"wwu18a\":[\"아이콘\"],\"x52RAh\":[\"Blocked by \",[\"blockedCount\"],\" unfinished card(s)\"],\"y1eoq1\":[\"링크 복사\"],\"y9cj46\":[\"그룹: 우선순위\"],\"ybGQtY\":[\"← 목록으로\"],\"yz7wBu\":[\"닫기\"],\"yzF66j\":[\"링크\"],\"zOc0vf\":[\"아이콘 없음\"],\"zga9sT\":[\"확인\"]}");
\ No newline at end of file
+/*eslint-disable*/export const messages=JSON.parse("{\"--lIxB\":[\"Blocked by\"],\"-b7T3G\":[\"Updated\"],\"1DBGsz\":[\"노트\"],\"1YABGm\":[\"링크 (Ctrl+K)\"],\"1hKEom\":[\"우선순위\"],\"2wxgft\":[\"이름 변경\"],\"3qkggm\":[\"전체 화면\"],\"4gdyen\":[\"로컈 (내 것)\"],\"4hJhzz\":[\"테이블\"],\"54sFiP\":[\"flowchart TD\\n  A[시작] --> B[끝]\"],\"5Q_DQ6\":[\"인라인 코드\"],\"7VpPHA\":[\"확인\"],\"7s3WlU\":[\"Blocks\"],\"8PifYj\":[\"Mermaid 다이어그램\"],\"8hSn0h\":[\"결과 (편집 가능)\"],\"8lE269\":[\"정렬: 수동\"],\"9gxam6\":[\"이 Draw.io 다이어그램을 렌더링할 수 없습니다.\"],\"AC9Gkf\":[\"열 펼치기\"],\"AS5WO9\":[\"이 PDF를 렌더링할 수 없습니다.\"],\"AVreQ5\":[\"드래그하여 크기 조정\"],\"AgvHni\":[\"열 추가\"],\"AxAubu\":[\"그룹: 담당자\"],\"BfMZ7w\":[\"클라우드 수낙\"],\"BnmEvM\":[\"템플릿으로 저장\"],\"C6-ZRl\":[\"Someone\"],\"EWPtMO\":[\"코드\"],\"EbMPZJ\":[\"미할당\"],\"G4qrLy\":[\"완료 열 해제\"],\"GKu3m4\":[\"라벨 없음\"],\"Gpfctt\":[\"마감\"],\"H_SQFv\":[\"색상 없음\"],\"I6SWEy\":[\"스플릿\"],\"ICip_B\":[\"클라우드 (원격)\"],\"Ik60OC\":[\"에디터에서 열기\"],\"Iw6WJa\":[\"WIP 한도 설정\"],\"JTYvAw\":[\"카드 검색\"],\"K_F6pa\":[\"저장 중…\"],\"KjXDqG\":[\"Swimlane: None\"],\"KmydK6\":[\"굵게\"],\"KvW1VO\":[\"Draw.io 다이어그램\"],\"LQn6-8\":[\"로컈 수낙\"],\"MHrjPM\":[\"제목\"],\"Mm72la\":[\"No comments yet\"],\"NBdIgR\":[\"Comment\"],\"OYHzN1\":[\"태그\"],\"OepdfE\":[\"그룹: 상태\"],\"Q2mGA7\":[\"필터 지우기\"],\"QD8opX\":[\"보드\"],\"QlsPZy\":[\"Mermaid 구문을 작성하면 다이어그램이 표시됩니다.\"],\"S5Qbb1\":[\"쉼표로 구분\"],\"TdfEV7\":[\"Archived\"],\"UQOvxZ\":[\"빈 카드\"],\"VNa_N2\":[\"이 파일 형식은 아직 미리볼 수 없습니다.\"],\"VbyRUy\":[\"Comments\"],\"WSP6v1\":[\"정렬: 우선순위\"],\"X03-eC\":[\"값을 입력해 주세요.\"],\"XJOV1Y\":[\"Activity\"],\"Ya7bZl\":[\"다이어그램 오류\"],\"Zot9XS\":[\"카드 없음\"],\"_5CsXX\":[\"완료 열\"],\"_EsjyQ\":[\"이것 사용\"],\"a6uhHr\":[\"굵게 (Ctrl+B)\"],\"aDvLhk\":[\"Add a comment…\"],\"abUZlY\":[\"세부정보 추가...\"],\"agOeRN\":[\"이 API 명세를 렌더링할 수 없습니다.\"],\"b4hVKD\":[\"색상 열\"],\"cfaWH-\":[\"라벨 추가\"],\"cnGeoo\":[\"삭제\"],\"d-F6q9\":[\"Created\"],\"d5z6xQ\":[\"WIP 한도 \",[\"0\"]],\"dEgA5A\":[\"취소\"],\"euc6Ns\":[\"복제\"],\"fYcKtB\":[\"정렬: 마감\"],\"gLDJuJ\":[\"제목 없는 카드\"],\"hh4sEG\":[\"Relates\"],\"hnK1gR\":[\"PDF 문서\"],\"i4_LY_\":[\"작성\"],\"iTylMl\":[\"템플릿\"],\"iYVqZq\":[\"열 이름\"],\"jUbC3Z\":[\"Swimlane: Priority\"],\"jZlrte\":[\"색상\"],\"kZlRKE\":[\"Mermaid 소스\"],\"kryGs-\":[\"카드\"],\"lCF0wC\":[\"새로고침\"],\"lHxVTh\":[\"Swimlane: Assignee\"],\"ltF1xa\":[\"병합 결과 저장\"],\"nabda1\":[\"카드 삭제\"],\"njJFtc\":[\"Delete comment\"],\"o7J4JM\":[\"필터\"],\"o8va6N\":[\"Restored\"],\"ojKCLU\":[\"담당자\"],\"p9yTeb\":[\"정렬: 제목\"],\"pKztsX\":[\"전체 에디터에서 열기\"],\"pnrmSP\":[\"새 카드\"],\"pwN6Ae\":[\"열 접기\"],\"pzutoc\":[\"기울임꼴\"],\"rdUucN\":[\"미리보기\"],\"sCzmvQ\":[\"개 카드\"],\"sQpDn6\":[\"전체 화면 종료\"],\"tK2x9T\":[\"⚠ 해결할 충돌 \",[\"0\"],\"건\",[\"1\"]],\"u2IprG\":[\"카드 제목 (Enter로 추가, Esc로 취소)\"],\"uAQUqI\":[\"상태\"],\"ucJg3u\":[\"Swimlane: Status\"],\"wf6Djn\":[\"기울임꼴 (Ctrl+I)\"],\"wtw-au\":[\"완료 열로 설정\"],\"wwu18a\":[\"아이콘\"],\"x52RAh\":[\"Blocked by \",[\"blockedCount\"],\" unfinished card(s)\"],\"y1eoq1\":[\"링크 복사\"],\"y9cj46\":[\"그룹: 우선순위\"],\"yEbJGs\":[\"+ Add field\"],\"ybGQtY\":[\"← 목록으로\"],\"yz7wBu\":[\"닫기\"],\"yzF66j\":[\"링크\"],\"zOc0vf\":[\"아이콘 없음\"],\"zga9sT\":[\"확인\"]}");
\ No newline at end of file
diff --git a/shared/i18n/locales/ko/messages.po b/shared/i18n/locales/ko/messages.po
index 6c852e0..70b0b22 100644
--- a/shared/i18n/locales/ko/messages.po
+++ b/shared/i18n/locales/ko/messages.po
@@ -22,6 +22,10 @@ msgstr ""
 msgid "← Back to list"
 msgstr "← 목록으로"
 
+#: shared/components/board/BoardPeek.tsx
+msgid "+ Add field"
+msgstr ""
+
 #. placeholder {0}: conflicts.length
 #. placeholder {1}: conflicts.length > 1 ? "s" : ""
 #: shared/components/ConflictResolver.tsx
diff --git a/shared/i18n/locales/zh/messages.mjs b/shared/i18n/locales/zh/messages.mjs
index 1039f41..7405069 100644
--- a/shared/i18n/locales/zh/messages.mjs
+++ b/shared/i18n/locales/zh/messages.mjs
@@ -1 +1 @@
-/*eslint-disable*/export const messages=JSON.parse("{\"--lIxB\":[\"被阻塞于\"],\"-b7T3G\":[\"更新\"],\"1DBGsz\":[\"备注\"],\"1YABGm\":[\"链接 (Ctrl+K)\"],\"1hKEom\":[\"优先级\"],\"2wxgft\":[\"重命名\"],\"3qkggm\":[\"全屏\"],\"4gdyen\":[\"本地（我的）\"],\"4hJhzz\":[\"表格\"],\"54sFiP\":[\"flowchart TD\\n  A[开始] --> B[结束]\"],\"5Q_DQ6\":[\"行内代码\"],\"7VpPHA\":[\"确认\"],\"7s3WlU\":[\"阻塞\"],\"8PifYj\":[\"Mermaid 图表\"],\"8hSn0h\":[\"结果（可编辑）\"],\"8lE269\":[\"排序:手动\"],\"9gxam6\":[\"无法渲染此 Draw.io 图表。\"],\"AC9Gkf\":[\"展开列\"],\"AS5WO9\":[\"无法渲染此 PDF。\"],\"AVreQ5\":[\"拖动调整宽度\"],\"AgvHni\":[\"添加列\"],\"AxAubu\":[\"分组:负责人\"],\"BfMZ7w\":[\"接受云端\"],\"BnmEvM\":[\"存为模板\"],\"C6-ZRl\":[\"某人\"],\"EWPtMO\":[\"代码\"],\"EbMPZJ\":[\"未分配\"],\"G4qrLy\":[\"取消完成列\"],\"GKu3m4\":[\"暂无标签\"],\"Gpfctt\":[\"截止日期\"],\"H_SQFv\":[\"无颜色\"],\"I6SWEy\":[\"分栏\"],\"ICip_B\":[\"云端（远程）\"],\"Ik60OC\":[\"在编辑器中打开\"],\"Iw6WJa\":[\"设置 WIP 限制\"],\"JTYvAw\":[\"搜索卡片\"],\"K_F6pa\":[\"保存中…\"],\"KjXDqG\":[\"泳道：无\"],\"KmydK6\":[\"粗体\"],\"KvW1VO\":[\"Draw.io 图表\"],\"LQn6-8\":[\"接受本地\"],\"MHrjPM\":[\"标题\"],\"Mm72la\":[\"暂无评论\"],\"NBdIgR\":[\"评论\"],\"OYHzN1\":[\"标签\"],\"OepdfE\":[\"分组:状态\"],\"Q2mGA7\":[\"清除筛选\"],\"QD8opX\":[\"看板\"],\"QlsPZy\":[\"输入 Mermaid 语法以查看图表。\"],\"S5Qbb1\":[\"用逗号分隔\"],\"TdfEV7\":[\"归档\"],\"UQOvxZ\":[\"空白卡片\"],\"VNa_N2\":[\"暂不支持预览此文件类型。\"],\"VbyRUy\":[\"评论\"],\"WSP6v1\":[\"排序:优先级\"],\"X03-eC\":[\"请输入内容。\"],\"XJOV1Y\":[\"活动\"],\"Ya7bZl\":[\"图表错误\"],\"Zot9XS\":[\"暂无卡片\"],\"_5CsXX\":[\"完成列\"],\"_EsjyQ\":[\"使用此版本\"],\"a6uhHr\":[\"粗体 (Ctrl+B)\"],\"aDvLhk\":[\"添加评论…\"],\"abUZlY\":[\"添加详情...\"],\"agOeRN\":[\"无法渲染此 API 规范。\"],\"b4hVKD\":[\"彩色列\"],\"cfaWH-\":[\"添加标签\"],\"cnGeoo\":[\"删除\"],\"d-F6q9\":[\"创建\"],\"d5z6xQ\":[\"WIP 限制 \",[\"0\"]],\"dEgA5A\":[\"取消\"],\"euc6Ns\":[\"复制卡片\"],\"fYcKtB\":[\"排序:截止\"],\"gLDJuJ\":[\"未命名卡片\"],\"hh4sEG\":[\"相关\"],\"hnK1gR\":[\"PDF 文档\"],\"i4_LY_\":[\"写作\"],\"iTylMl\":[\"模板\"],\"iYVqZq\":[\"列名称\"],\"jUbC3Z\":[\"泳道：优先级\"],\"jZlrte\":[\"颜色\"],\"kZlRKE\":[\"Mermaid 源码\"],\"kryGs-\":[\"卡片\"],\"lCF0wC\":[\"刷新\"],\"lHxVTh\":[\"泳道：负责人\"],\"ltF1xa\":[\"保存合并结果\"],\"nabda1\":[\"删除卡片\"],\"njJFtc\":[\"删除评论\"],\"o7J4JM\":[\"筛选\"],\"o8va6N\":[\"恢复\"],\"ojKCLU\":[\"负责人\"],\"p9yTeb\":[\"排序:标题\"],\"pKztsX\":[\"在完整编辑器中打开\"],\"pnrmSP\":[\"新建卡片\"],\"pwN6Ae\":[\"折叠列\"],\"pzutoc\":[\"斜体\"],\"rdUucN\":[\"预览\"],\"sCzmvQ\":[\"张卡片\"],\"sQpDn6\":[\"退出全屏\"],\"tK2x9T\":[\"⚠ \",[\"0\"],\" 个冲突\",[\"1\"],\"待解决\"],\"u2IprG\":[\"卡片标题(回车添加,Esc 取消)\"],\"uAQUqI\":[\"状态\"],\"ucJg3u\":[\"泳道：状态\"],\"wf6Djn\":[\"斜体 (Ctrl+I)\"],\"wtw-au\":[\"设为完成列\"],\"wwu18a\":[\"图标\"],\"x52RAh\":[\"被 \",[\"blockedCount\"],\" 张未完成卡片阻塞\"],\"y1eoq1\":[\"复制链接\"],\"y9cj46\":[\"分组:优先级\"],\"ybGQtY\":[\"← 返回列表\"],\"yz7wBu\":[\"关闭\"],\"yzF66j\":[\"链接\"],\"zOc0vf\":[\"无图标\"],\"zga9sT\":[\"确定\"]}");
\ No newline at end of file
+/*eslint-disable*/export const messages=JSON.parse("{\"--lIxB\":[\"被阻塞于\"],\"-b7T3G\":[\"更新\"],\"1DBGsz\":[\"备注\"],\"1YABGm\":[\"链接 (Ctrl+K)\"],\"1hKEom\":[\"优先级\"],\"2wxgft\":[\"重命名\"],\"3qkggm\":[\"全屏\"],\"4gdyen\":[\"本地（我的）\"],\"4hJhzz\":[\"表格\"],\"54sFiP\":[\"flowchart TD\\n  A[开始] --> B[结束]\"],\"5Q_DQ6\":[\"行内代码\"],\"7VpPHA\":[\"确认\"],\"7s3WlU\":[\"阻塞\"],\"8PifYj\":[\"Mermaid 图表\"],\"8hSn0h\":[\"结果（可编辑）\"],\"8lE269\":[\"排序:手动\"],\"9gxam6\":[\"无法渲染此 Draw.io 图表。\"],\"AC9Gkf\":[\"展开列\"],\"AS5WO9\":[\"无法渲染此 PDF。\"],\"AVreQ5\":[\"拖动调整宽度\"],\"AgvHni\":[\"添加列\"],\"AxAubu\":[\"分组:负责人\"],\"BfMZ7w\":[\"接受云端\"],\"BnmEvM\":[\"存为模板\"],\"C6-ZRl\":[\"某人\"],\"EWPtMO\":[\"代码\"],\"EbMPZJ\":[\"未分配\"],\"G4qrLy\":[\"取消完成列\"],\"GKu3m4\":[\"暂无标签\"],\"Gpfctt\":[\"截止日期\"],\"H_SQFv\":[\"无颜色\"],\"I6SWEy\":[\"分栏\"],\"ICip_B\":[\"云端（远程）\"],\"Ik60OC\":[\"在编辑器中打开\"],\"Iw6WJa\":[\"设置 WIP 限制\"],\"JTYvAw\":[\"搜索卡片\"],\"K_F6pa\":[\"保存中…\"],\"KjXDqG\":[\"泳道：无\"],\"KmydK6\":[\"粗体\"],\"KvW1VO\":[\"Draw.io 图表\"],\"LQn6-8\":[\"接受本地\"],\"MHrjPM\":[\"标题\"],\"Mm72la\":[\"暂无评论\"],\"NBdIgR\":[\"评论\"],\"OYHzN1\":[\"标签\"],\"OepdfE\":[\"分组:状态\"],\"Q2mGA7\":[\"清除筛选\"],\"QD8opX\":[\"看板\"],\"QlsPZy\":[\"输入 Mermaid 语法以查看图表。\"],\"S5Qbb1\":[\"用逗号分隔\"],\"TdfEV7\":[\"归档\"],\"UQOvxZ\":[\"空白卡片\"],\"VNa_N2\":[\"暂不支持预览此文件类型。\"],\"VbyRUy\":[\"评论\"],\"WSP6v1\":[\"排序:优先级\"],\"X03-eC\":[\"请输入内容。\"],\"XJOV1Y\":[\"活动\"],\"Ya7bZl\":[\"图表错误\"],\"Zot9XS\":[\"暂无卡片\"],\"_5CsXX\":[\"完成列\"],\"_EsjyQ\":[\"使用此版本\"],\"a6uhHr\":[\"粗体 (Ctrl+B)\"],\"aDvLhk\":[\"添加评论…\"],\"abUZlY\":[\"添加详情...\"],\"agOeRN\":[\"无法渲染此 API 规范。\"],\"b4hVKD\":[\"彩色列\"],\"cfaWH-\":[\"添加标签\"],\"cnGeoo\":[\"删除\"],\"d-F6q9\":[\"创建\"],\"d5z6xQ\":[\"WIP 限制 \",[\"0\"]],\"dEgA5A\":[\"取消\"],\"euc6Ns\":[\"复制卡片\"],\"fYcKtB\":[\"排序:截止\"],\"gLDJuJ\":[\"未命名卡片\"],\"hh4sEG\":[\"相关\"],\"hnK1gR\":[\"PDF 文档\"],\"i4_LY_\":[\"写作\"],\"iTylMl\":[\"模板\"],\"iYVqZq\":[\"列名称\"],\"jUbC3Z\":[\"泳道：优先级\"],\"jZlrte\":[\"颜色\"],\"kZlRKE\":[\"Mermaid 源码\"],\"kryGs-\":[\"卡片\"],\"lCF0wC\":[\"刷新\"],\"lHxVTh\":[\"泳道：负责人\"],\"ltF1xa\":[\"保存合并结果\"],\"nabda1\":[\"删除卡片\"],\"njJFtc\":[\"删除评论\"],\"o7J4JM\":[\"筛选\"],\"o8va6N\":[\"恢复\"],\"ojKCLU\":[\"负责人\"],\"p9yTeb\":[\"排序:标题\"],\"pKztsX\":[\"在完整编辑器中打开\"],\"pnrmSP\":[\"新建卡片\"],\"pwN6Ae\":[\"折叠列\"],\"pzutoc\":[\"斜体\"],\"rdUucN\":[\"预览\"],\"sCzmvQ\":[\"张卡片\"],\"sQpDn6\":[\"退出全屏\"],\"tK2x9T\":[\"⚠ \",[\"0\"],\" 个冲突\",[\"1\"],\"待解决\"],\"u2IprG\":[\"卡片标题(回车添加,Esc 取消)\"],\"uAQUqI\":[\"状态\"],\"ucJg3u\":[\"泳道：状态\"],\"wf6Djn\":[\"斜体 (Ctrl+I)\"],\"wtw-au\":[\"设为完成列\"],\"wwu18a\":[\"图标\"],\"x52RAh\":[\"被 \",[\"blockedCount\"],\" 张未完成卡片阻塞\"],\"y1eoq1\":[\"复制链接\"],\"y9cj46\":[\"分组:优先级\"],\"yEbJGs\":[\"+ 添加字段\"],\"ybGQtY\":[\"← 返回列表\"],\"yz7wBu\":[\"关闭\"],\"yzF66j\":[\"链接\"],\"zOc0vf\":[\"无图标\"],\"zga9sT\":[\"确定\"]}");
\ No newline at end of file
diff --git a/shared/i18n/locales/zh/messages.po b/shared/i18n/locales/zh/messages.po
index 626e528..4214a8f 100644
--- a/shared/i18n/locales/zh/messages.po
+++ b/shared/i18n/locales/zh/messages.po
@@ -22,6 +22,10 @@ msgstr ""
 msgid "← Back to list"
 msgstr "← 返回列表"
 
+#: shared/components/board/BoardPeek.tsx
+msgid "+ Add field"
+msgstr "+ 添加字段"
+
 #. placeholder {0}: conflicts.length
 #. placeholder {1}: conflicts.length > 1 ? "s" : ""
 #: shared/components/ConflictResolver.tsx
diff --git a/shared/lib/board.ts b/shared/lib/board.ts
index 110e034..2c223cf 100644
--- a/shared/lib/board.ts
+++ b/shared/lib/board.ts
@@ -15,6 +15,10 @@ export type BoardGroupKey = "status" | "priority" | "assignee";
 export type BoardSortKey = "manual" | "due" | "priority" | "title";
 export type BoardViewType = "board" | "table";
 
+export type BoardFieldType = "text" | "number" | "date";
+/** A user-defined custom field on a board's cards (stored in frontmatter / properties). */
+export type BoardFieldDef = { key: string; label: string; type?: BoardFieldType };
+
 export type BoardViewConfig = {
   title: string;
   columns: BoardViewColumn[];
@@ -24,6 +28,8 @@ export type BoardViewConfig = {
   colorColumns?: boolean;
   viewType?: BoardViewType;
   groupBy?: BoardGroupKey;
+  /** User-defined custom fields shown/edited on cards (board-level schema). */
+  fields?: BoardFieldDef[];
   /**
    * Second grouping dimension rendered as horizontal swimlanes (rows) in the
    * board view. Must differ from `groupBy`; unset = no swimlanes.
@@ -51,6 +57,8 @@ export type BoardViewCard = {
   taskDone?: number;
   taskTotal?: number;
   excerpt?: string | null;
+  /** Values for the board's user-defined custom fields, keyed by field key. */
+  custom?: Record<string, string>;
   /** Card slugs this card is blocked by (frontmatter `blocked_by`). */
   blockedBy?: string[];
   /** Card slugs this card blocks (frontmatter `blocks`). */
@@ -59,6 +67,20 @@ export type BoardViewCard = {
   relates?: string[];
 };
 
+/** Read the declared custom-field values out of a flat property/frontmatter map. */
+export function pickCustomFields(
+  props: Record<string, string> | null | undefined,
+  fields: BoardFieldDef[] | undefined,
+): Record<string, string> {
+  const out: Record<string, string> = {};
+  if (!props || !fields) return out;
+  for (const f of fields) {
+    const v = props[f.key];
+    if (v !== undefined && v !== "") out[f.key] = v;
+  }
+  return out;
+}
+
 export type CardFilter = { prop: "priority" | "assignee" | "tag"; value: string };
 
 /** A card comment (DB board). */
@@ -80,6 +102,27 @@ export const PRIORITY_STYLE: Record<string, string> = {
 export const COLUMN_COLORS = ["#ef4444", "#f59e0b", "#eab308", "#22c55e", "#0ea5e9", "#6366f1", "#a855f7", "#ec4899", "#78716c"];
 export const DEFAULT_DONE_COLUMN = "done";
 
+/**
+ * Frontmatter / property keys the board itself owns. A user-defined custom-field
+ * key must never equal one of these, or writing the field value would clobber a
+ * core card attribute (e.g. a field called "Status" → key `status`).
+ */
+export const RESERVED_CARD_KEYS = [
+  "title",
+  "board",
+  "status",
+  "position",
+  "priority",
+  "assignee",
+  "due",
+  "tags",
+  "icon",
+  "blocked_by",
+  "blocks",
+  "relates",
+  "attachments",
+];
+
 /** Count Markdown task checkboxes (`- [ ]` / `- [x]`) in a body → (done, total). */
 export function countTasks(md: string): { done: number; total: number } {
   let done = 0;
diff --git a/src/components/BoardView.tsx b/src/components/BoardView.tsx
index 87b87dc..cceea36 100644
--- a/src/components/BoardView.tsx
+++ b/src/components/BoardView.tsx
@@ -8,6 +8,7 @@ import { BoardSurface } from "@shared/components/board";
 import type { BoardActions } from "@shared/components/board";
 import {
   DEFAULT_DONE_COLUMN,
+  pickCustomFields,
   serializeLinks,
   slugify,
   type BoardViewCard,
@@ -87,11 +88,12 @@ export function BoardView({ boardPath, boardRelativePath }: { boardPath: string;
         taskDone: c.taskDone,
         taskTotal: c.taskTotal,
         excerpt: c.excerpt ?? null,
+        custom: pickCustomFields(c.properties, config?.fields),
         blockedBy: c.blockedBy ?? [],
         blocks: c.blocks ?? [],
         relates: c.relates ?? [],
       })),
-    [rawCards],
+    [rawCards, config?.fields],
   );
 
   const viewConfig: BoardViewConfig = useMemo(
@@ -103,6 +105,7 @@ export function BoardView({ boardPath, boardRelativePath }: { boardPath: string;
             doneColumn: config.doneColumn,
             colorColumns: config.colorColumns,
             viewType: config.viewType,
+            fields: config.fields,
             swimlaneBy: config.swimlaneBy as BoardViewConfig["swimlaneBy"],
             groupBy: (config.groupBy as BoardViewConfig["groupBy"]) || "status",
           }
@@ -173,6 +176,7 @@ export function BoardView({ boardPath, boardRelativePath }: { boardPath: string;
           if (patch.due !== undefined) next.due = patch.due ?? "";
           if (patch.icon !== undefined) next.icon = patch.icon ?? "";
           if (patch.tags !== undefined) next.tags = patch.tags.map((tg) => tg.label).join(", ");
+          if (patch.custom !== undefined) for (const [k, v] of Object.entries(patch.custom)) next[k] = v ?? "";
           if (patch.blockedBy !== undefined) next.blocked_by = serializeLinks(patch.blockedBy);
           if (patch.blocks !== undefined) next.blocks = serializeLinks(patch.blocks);
           if (patch.relates !== undefined) next.relates = serializeLinks(patch.relates);
diff --git a/src/lib/types.ts b/src/lib/types.ts
index 921f855..7fcbccf 100644
--- a/src/lib/types.ts
+++ b/src/lib/types.ts
@@ -21,6 +21,8 @@ export type BoardConfig = {
   colorColumns?: boolean;
   /** Which renderer this board shows: kanban columns or a flat table. Defaults to "board". */
   viewType?: "board" | "table";
+  /** User-defined custom fields shown/edited on this board's cards. */
+  fields?: { key: string; label: string; type?: "text" | "number" | "date" }[];
   /** Optional second grouping dimension rendered as swimlane rows in the board view. */
   swimlaneBy?: "status" | "priority" | "assignee";
 };
@@ -40,6 +42,8 @@ export type BoardCard = {
   taskTotal?: number;
   icon?: string | null;
   excerpt?: string | null;
+  /** Full frontmatter map (for custom fields declared in the board config). */
+  properties?: Record<string, string>;
   blockedBy?: string[];
   blocks?: string[];
   relates?: string[];
diff --git a/tests/unit/boardCustomFields.spec.ts b/tests/unit/boardCustomFields.spec.ts
new file mode 100644
index 0000000..2e44778
--- /dev/null
+++ b/tests/unit/boardCustomFields.spec.ts
@@ -0,0 +1,22 @@
+import { test, expect } from "@playwright/test";
+import { pickCustomFields, type BoardFieldDef } from "../../shared/lib/board";
+
+// Pure-logic acceptance for C5 custom fields: the adapters read declared field
+// values out of a flat property/frontmatter map via pickCustomFields.
+
+const fields: BoardFieldDef[] = [
+  { key: "story_points", label: "Story Points", type: "number" },
+  { key: "owner_team", label: "Owner Team" },
+];
+
+test("pickCustomFields extracts only declared, non-empty keys", () => {
+  const props = { story_points: "5", owner_team: "Platform", board: "proj", status: "todo" };
+  expect(pickCustomFields(props, fields)).toEqual({ story_points: "5", owner_team: "Platform" });
+});
+
+test("pickCustomFields skips missing/empty values and undeclared keys", () => {
+  expect(pickCustomFields({ story_points: "3", owner_team: "" }, fields)).toEqual({ story_points: "3" });
+  expect(pickCustomFields({ unrelated: "x" }, fields)).toEqual({});
+  expect(pickCustomFields(null, fields)).toEqual({});
+  expect(pickCustomFields({ story_points: "1" }, undefined)).toEqual({});
+});