diff --git a/.changeset/dashboard-column-role-browser-export.md b/.changeset/dashboard-column-role-browser-export.md
new file mode 100644
index 0000000000..e434a1dd47
--- /dev/null
+++ b/.changeset/dashboard-column-role-browser-export.md
@@ -0,0 +1,7 @@
+---
+"@runfusion/fusion": patch
+---
+
+summary: Fix the dashboard build after task undo classification began using shared column-role helpers.
+category: fix
+dev: Export the browser-safe column-roles core leaf and mirror its alias across Vite and Vitest consumers so broad core aliases cannot swallow the subpath.
diff --git a/packages/core/package.json b/packages/core/package.json
index 22a4407d20..c6ac3b09e0 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -29,6 +29,11 @@
       "source": "./src/task-delete-attribution.ts",
       "import": "./dist/task-delete-attribution.js"
     },
+    "./column-roles": {
+      "types": "./src/column-roles.ts",
+      "source": "./src/column-roles.ts",
+      "import": "./dist/column-roles.js"
+    },
     "./detect-content-language": {
       "types": "./src/detect-content-language.ts",
       "source": "./src/detect-content-language.ts",
diff --git a/packages/dashboard/app/utils/taskRevert.ts b/packages/dashboard/app/utils/taskRevert.ts
index 360f8da670..70994616d0 100644
--- a/packages/dashboard/app/utils/taskRevert.ts
+++ b/packages/dashboard/app/utils/taskRevert.ts
@@ -1,5 +1,5 @@
 import type { Task } from "@fusion/core";
-import { isTerminalColumnRole, type ColumnRoleTraitFlags } from "@fusion/core";
+import { isTerminalColumnRole, type ColumnRoleTraitFlags } from "@fusion/core/column-roles";
 
 /**
  * FNXC:TaskRevert 2026-07-04-00:00:
diff --git a/packages/dashboard/vite.config.ts b/packages/dashboard/vite.config.ts
index f43737f518..93f816e5c4 100644
--- a/packages/dashboard/vite.config.ts
+++ b/packages/dashboard/vite.config.ts
@@ -141,6 +141,7 @@ export default defineConfig({
       Ordered before the `@fusion/core` entry because Vite matches aliases in order and the broader key would otherwise swallow this subpath — the exact failure this line was added to fix (`"FUSION_CLIENT_HEADER" is not exported by ../core/src/types.ts`).
       */
       "@fusion/core/task-delete-attribution": resolve(__dirname, "../core/src/task-delete-attribution.ts"),
+      "@fusion/core/column-roles": resolve(__dirname, "../core/src/column-roles.ts"),
       "@fusion/core/detect-content-language": resolve(__dirname, "../core/src/detect-content-language.ts"),
       "@fusion/core": resolve(__dirname, "../core/src/types.ts"),
       "@fusion/dashboard/app/components/TaskCard": resolve(__dirname, "app/components/TaskCard.tsx"),
diff --git a/packages/dashboard/vitest.config.ts b/packages/dashboard/vitest.config.ts
index bfae4aebc7..10b52dfe28 100644
--- a/packages/dashboard/vitest.config.ts
+++ b/packages/dashboard/vitest.config.ts
@@ -534,6 +534,7 @@ export default defineConfig({
       Keep this exact alias before the broader core alias so Vite does not rewrite the subpath.
       */
       "@fusion/core/task-delete-attribution": resolve(__dirname, "../core/src/task-delete-attribution.ts"),
+      "@fusion/core/column-roles": resolve(__dirname, "../core/src/column-roles.ts"),
       "@fusion/core": resolve(__dirname, "../core/src/index.ts"),
       "@fusion/engine": resolve(__dirname, "../engine/src/index.ts"),
       "@fusion/plugin-sdk": resolve(__dirname, "../plugin-sdk/src/index.ts"),
diff --git a/packages/desktop/vitest.config.ts b/packages/desktop/vitest.config.ts
index 59e5201251..68650cb8f2 100644
--- a/packages/desktop/vitest.config.ts
+++ b/packages/desktop/vitest.config.ts
@@ -11,6 +11,7 @@ const fusionAliases = {
   transitively — this project aliases `@fusion/dashboard`, and `app/api/client.ts` imports the
   browser-safe delete-attribution leaf.
   */
+  "@fusion/core/column-roles": resolve(__dirname, "../core/src/column-roles.ts"),
   "@fusion/core/task-delete-attribution": resolve(__dirname, "../core/src/task-delete-attribution.ts"),
   "@fusion/core": resolve(__dirname, "../core/src/index.ts"),
   "@fusion/dashboard": resolve(__dirname, "../dashboard/src/index.ts"),
diff --git a/packages/engine/src/__tests__/workflow-scheduler-parked-columns-live-e2e.pg.test.ts b/packages/engine/src/__tests__/workflow-scheduler-parked-columns-live-e2e.pg.test.ts
index 3154ad11da..2193b614ec 100644
--- a/packages/engine/src/__tests__/workflow-scheduler-parked-columns-live-e2e.pg.test.ts
+++ b/packages/engine/src/__tests__/workflow-scheduler-parked-columns-live-e2e.pg.test.ts
@@ -168,7 +168,7 @@ pgDescribe("scheduler parked-column resolution against a live store", () => {
 
   it("REGRESSION — a dependent in a RENAMED hold column IS unblocked when its blocker is deleted", async () => {
     /*
-    FNXC:WorkflowResolvedColumns 2026-08-01-02:20 (fleet — the flip this test was written to catch):
+    FNXC:WorkflowResolvedColumns 2026-07-31-06:35 (fleet — the flip this test was written to catch):
     This was a CHARACTERIZATION of the inert sync read: `resolveTaskParkedColumnsSync` answered
     `{ hold: "todo" }` for a board whose hold column is `backlog`, so the reconciliation queried a
     column that does not exist, found no dependents, and left `blockedBy` pointing at a deleted task.
diff --git a/packages/engine/src/scheduler.ts b/packages/engine/src/scheduler.ts
index 0c945a6e5d..33f3a277fe 100644
--- a/packages/engine/src/scheduler.ts
+++ b/packages/engine/src/scheduler.ts
@@ -450,7 +450,7 @@ function mergeParkedColumns(
 }
 
 /*
-FNXC:WorkflowResolvedColumns 2026-08-01-01:40 (fleet):
+FNXC:WorkflowResolvedColumns 2026-07-31-06:35 (fleet):
 The ASYNC twin. The sync one below cannot answer for a custom workflow in production, so any guard that
 can reach this one must.
 
@@ -477,7 +477,7 @@ async function resolveTaskParkedColumns(store: TaskStore, taskId: string): Promi
       archived,
       terminal: new Set([complete, archived]),
       /*
-      FNXC:WorkflowResolvedColumns 2026-08-01-02:05 (fleet):
+      FNXC:WorkflowResolvedColumns 2026-07-31-06:35 (fleet):
       The wake set UNIONS the legacy ids rather than replacing them, and that is load-bearing rather
       than defensive. Post-U11 the default lineage has no `triage` column, so a RESOLVED answer returns
       `intake: "todo"` where the old inert path fell back to `"triage"`. Converting without the union
@@ -1268,7 +1268,7 @@ export class Scheduler {
             schedulerLog.warn(`Failed to reset dispatch oscillation state for ${task.id} on unpause: ${error instanceof Error ? error.message : String(error)}`);
           });
         }
-        /* FNXC:WorkflowResolvedColumns 2026-08-01-01:40 (fleet): the answer only gates `schedule()`,
+        /* FNXC:WorkflowResolvedColumns 2026-07-31-06:35 (fleet): the answer only gates `schedule()`,
            which is async and fire-and-forget, so resolving it properly costs nothing observable. */
         void (async () => {
           const unpausedParked = await resolveTaskParkedColumns(this.store, task.id);
@@ -1299,7 +1299,7 @@ export class Scheduler {
         this.planningTaskIds.add(task.id);
       } else if (this.planningTaskIds.has(task.id)) {
         this.planningTaskIds.delete(task.id);
-        /* FNXC:WorkflowResolvedColumns 2026-08-01-01:40 (fleet): as with the unpause wake above, the
+        /* FNXC:WorkflowResolvedColumns 2026-07-31-06:35 (fleet): as with the unpause wake above, the
            answer only gates `schedule()`. The `planningTaskIds.delete` stays SYNCHRONOUS — it is the
            edge-trigger bookkeeping, and deferring it would let a second update re-enter this branch. */
         void (async () => {
diff --git a/packages/engine/vitest.config.ts b/packages/engine/vitest.config.ts
index a4ef94013e..57a0e43146 100644
--- a/packages/engine/vitest.config.ts
+++ b/packages/engine/vitest.config.ts
@@ -14,6 +14,7 @@ export default defineConfig({
       transitively — this project aliases `@fusion/dashboard`, and `app/api/client.ts` imports the
       browser-safe delete-attribution leaf.
       */
+      "@fusion/core/column-roles": resolve(__dirname, "../core/src/column-roles.ts"),
       "@fusion/core/task-delete-attribution": resolve(__dirname, "../core/src/task-delete-attribution.ts"),
       "@fusion/core": resolve(__dirname, "../core/src/index.ts"),
       "@fusion/test-utils": resolve(__dirname, "../core/src/__test-utils__/workspace.ts"),
diff --git a/plugins/fusion-plugin-cli-printing-press/vitest.config.ts b/plugins/fusion-plugin-cli-printing-press/vitest.config.ts
index e9f4487190..23474091a6 100644
--- a/plugins/fusion-plugin-cli-printing-press/vitest.config.ts
+++ b/plugins/fusion-plugin-cli-printing-press/vitest.config.ts
@@ -32,6 +32,7 @@ export default defineConfig({
       transitively — this project aliases `@fusion/dashboard`, and `app/api/client.ts` imports the
       browser-safe delete-attribution leaf.
       */
+      "@fusion/core/column-roles": fileURLToPath(new URL("../../packages/core/src/column-roles.ts", import.meta.url)),
       "@fusion/core/task-delete-attribution": fileURLToPath(new URL("../../packages/core/src/task-delete-attribution.ts", import.meta.url)),
       "@fusion/core": fileURLToPath(new URL("../../packages/core/src/index.ts", import.meta.url)),
       "@fusion/plugin-sdk": fileURLToPath(new URL("../../packages/plugin-sdk/src/index.ts", import.meta.url)),
diff --git a/plugins/fusion-plugin-compound-engineering/vitest.config.ts b/plugins/fusion-plugin-compound-engineering/vitest.config.ts
index 4db8348112..bbb1e7d735 100644
--- a/plugins/fusion-plugin-compound-engineering/vitest.config.ts
+++ b/plugins/fusion-plugin-compound-engineering/vitest.config.ts
@@ -52,6 +52,7 @@ export default defineConfig({
       transitively — this project aliases `@fusion/dashboard`, and `app/api/client.ts` imports the
       browser-safe delete-attribution leaf.
       */
+      { find: "@fusion/core/column-roles", replacement: fileURLToPath(new URL("../../packages/core/src/column-roles.ts", import.meta.url)) },
       { find: "@fusion/core/task-delete-attribution", replacement: fileURLToPath(new URL("../../packages/core/src/task-delete-attribution.ts", import.meta.url)) },
       { find: "@fusion/core", replacement: fileURLToPath(new URL("../../packages/core/src/index.ts", import.meta.url)) },
       {
diff --git a/plugins/fusion-plugin-dependency-graph/vitest.config.ts b/plugins/fusion-plugin-dependency-graph/vitest.config.ts
index c39bbb92ec..e065b896a5 100644
--- a/plugins/fusion-plugin-dependency-graph/vitest.config.ts
+++ b/plugins/fusion-plugin-dependency-graph/vitest.config.ts
@@ -33,6 +33,7 @@ export default defineConfig({
       transitively — this project aliases `@fusion/dashboard`, and `app/api/client.ts` imports the
       browser-safe delete-attribution leaf.
       */
+      { find: "@fusion/core/column-roles", replacement: fileURLToPath(new URL("../../packages/core/src/column-roles.ts", import.meta.url)) },
       { find: "@fusion/core/task-delete-attribution", replacement: fileURLToPath(new URL("../../packages/core/src/task-delete-attribution.ts", import.meta.url)) },
       { find: "@fusion/core", replacement: fileURLToPath(new URL("../../packages/core/src/index.ts", import.meta.url)) },
       {
diff --git a/plugins/fusion-plugin-reports/vitest.config.ts b/plugins/fusion-plugin-reports/vitest.config.ts
index dbfa9b84dc..53fe049395 100644
--- a/plugins/fusion-plugin-reports/vitest.config.ts
+++ b/plugins/fusion-plugin-reports/vitest.config.ts
@@ -32,6 +32,7 @@ export default defineConfig({
       transitively — this project aliases `@fusion/dashboard`, and `app/api/client.ts` imports the
       browser-safe delete-attribution leaf.
       */
+      "@fusion/core/column-roles": fileURLToPath(new URL("../../packages/core/src/column-roles.ts", import.meta.url)),
       "@fusion/core/task-delete-attribution": fileURLToPath(new URL("../../packages/core/src/task-delete-attribution.ts", import.meta.url)),
       "@fusion/core": fileURLToPath(new URL("../../packages/core/src/index.ts", import.meta.url)),
       // FNXC:Clipboard 2026-07-12-00:00: The reports plugin imports the dashboard clipboard helper through its package subpath export; keep this exact alias ahead of the package root alias so vitest does not collapse the subpath to src/index.ts.
diff --git a/scripts/lib/dashboard-browser-safe-core-modules.json b/scripts/lib/dashboard-browser-safe-core-modules.json
index e256bf5b07..5fd1bd0e3e 100644
--- a/scripts/lib/dashboard-browser-safe-core-modules.json
+++ b/scripts/lib/dashboard-browser-safe-core-modules.json
@@ -60,6 +60,11 @@
       "reason": "2026-07-26: Delete caller-attribution constants and the pure header resolver are shared by the browser client that stamps `x-fusion-client` and the route that reads it; the module has no imports at all.",
       "verifiedAt": "2026-07-26"
     },
+    {
+      "module": "column-roles",
+      "reason": "2026-07-31: Column role predicates depend only on erased trait types and provide browser-safe flags-first lifecycle classification.",
+      "verifiedAt": "2026-07-31"
+    },
     {
       "module": "live-agent-count",
       "reason": "2026-07-21: FN-8453 shares pure workflow-trait-based Running and Waiting predicates with dashboard capacity indicators; its dependency graph has no Node-only modules.",