diff --git a/ui/src/App.tsx b/ui/src/App.tsx
index 7c941d2615..1011501dfe 100644
--- a/ui/src/App.tsx
+++ b/ui/src/App.tsx
@@ -269,8 +269,10 @@ function boardRoutes() {
         <Route path="artifacts" element={<Artifacts />} />
       </Route>
       <Route path="decisions" element={<WhatNeedsMe />} />
-      <Route path="training" element={<TrainingLibrary />} />
-      <Route path="training/:id" element={<TrainingInspector />} />
+      <Route path="decisions/training" element={<TrainingLibrary />} />
+      <Route path="decisions/training/:id" element={<TrainingInspector />} />
+      <Route path="training" element={<Navigate to="/decisions/training" replace />} />
+      <Route path="training/:id" element={<LegacyTrainingRedirect />} />
       <Route path="inbox" element={<InboxRootRedirect />} />
       <Route path="inbox/mine" element={<Inbox />} />
       <Route path="inbox/recent" element={<Inbox />} />
@@ -298,6 +300,11 @@ function InboxRootRedirect() {
   return <Navigate to={`/inbox/${loadLastInboxTab()}`} replace />;
 }
 
+function LegacyTrainingRedirect() {
+  const { id } = useParams<{ id: string }>();
+  return <Navigate to={id ? `/decisions/training/${id}` : "/decisions/training"} replace />;
+}
+
 function LegacySkillStudioRedirect() {
   const location = useLocation();
   const { companies, selectedCompany, loading } = useCompany();
diff --git a/ui/src/components/DecisionTrainingDrawer.tsx b/ui/src/components/DecisionTrainingDrawer.tsx
index 5b5c436290..7e31f83b1e 100644
--- a/ui/src/components/DecisionTrainingDrawer.tsx
+++ b/ui/src/components/DecisionTrainingDrawer.tsx
@@ -18,7 +18,7 @@ import { Link } from "@/lib/router";
 import { decisionTrainingApi, type DecisionTrainingTarget } from "../api/decisionTraining";
 import { useToastActions } from "../context/ToastContext";
 import { queryKeys } from "../lib/queryKeys";
-import { codeResolutionLabel, trainingTargetForItem } from "../lib/decisionTraining";
+import { codeResolutionLabel, decisionTrainingHref, trainingTargetForItem } from "../lib/decisionTraining";
 import { relativeTime } from "../lib/utils";
 import { Button } from "./ui/button";
 import { Textarea } from "./ui/textarea";
@@ -385,7 +385,7 @@ function SavedState({
         </AlertDialog>
 
         <Button asChild variant="outline" size="sm">
-          <Link to={`/training/${record.id}`}>
+          <Link to={decisionTrainingHref(record.id)}>
             Open full record
             <ExternalLink className="size-3.5" />
           </Link>
@@ -456,7 +456,7 @@ function SnapshotPreview({
             icon={<Clock className="size-4" />}
             label="Cutoff"
             value={cutoffAt ? new Date(cutoffAt).toLocaleString() : "now"}
-            href={exampleId ? `/training/${exampleId}` : undefined}
+            href={exampleId ? decisionTrainingHref(exampleId) : undefined}
           />
           <SnapshotRow
             icon={<MessageSquare className="size-4" />}
@@ -466,13 +466,13 @@ function SnapshotPreview({
                 ? "None before cutoff"
                 : `${snapshot.cutoff.commentCount} · last ${snapshot.cutoff.lastCommentId?.slice(0, 8) ?? "—"}`
             }
-            href={exampleId ? `/training/${exampleId}` : undefined}
+            href={exampleId ? decisionTrainingHref(exampleId) : undefined}
           />
           <SnapshotRow
             icon={<Play className="size-4" />}
             label="Runs"
             value={snapshot.runs.length === 0 ? "None before cutoff" : `${snapshot.runs.length} before cutoff`}
-            href={exampleId ? `/training/${exampleId}` : undefined}
+            href={exampleId ? decisionTrainingHref(exampleId) : undefined}
           />
           <SnapshotRow
             icon={<GitCommitHorizontal className="size-4" />}
@@ -482,7 +482,7 @@ function SnapshotPreview({
                 ? `${snapshot.code.commitSha.slice(0, 10)} · ${codeResolutionLabel(snapshot.code.resolution)}`
                 : codeResolutionLabel(snapshot.code.resolution)
             }
-            href={exampleId ? `/training/${exampleId}` : undefined}
+            href={exampleId ? decisionTrainingHref(exampleId) : undefined}
           />
         </div>
       )}
diff --git a/ui/src/lib/decisionTraining.test.ts b/ui/src/lib/decisionTraining.test.ts
new file mode 100644
index 0000000000..b12b78d979
--- /dev/null
+++ b/ui/src/lib/decisionTraining.test.ts
@@ -0,0 +1,12 @@
+import { describe, expect, it } from "vitest";
+import { decisionTrainingHref } from "./decisionTraining";
+
+describe("decisionTrainingHref", () => {
+  it("keeps the training library under decisions", () => {
+    expect(decisionTrainingHref()).toBe("/decisions/training");
+  });
+
+  it("keeps training records under decisions", () => {
+    expect(decisionTrainingHref("example-1")).toBe("/decisions/training/example-1");
+  });
+});
diff --git a/ui/src/lib/decisionTraining.ts b/ui/src/lib/decisionTraining.ts
index fec49a8004..f6f9b47492 100644
--- a/ui/src/lib/decisionTraining.ts
+++ b/ui/src/lib/decisionTraining.ts
@@ -1,6 +1,10 @@
 import type { AttentionItem, DecisionTrainingSnapshotV1 } from "@paperclipai/shared";
 import type { DecisionTrainingTarget } from "../api/decisionTraining";
 
+export function decisionTrainingHref(exampleId?: string): string {
+  return exampleId ? `/decisions/training/${exampleId}` : "/decisions/training";
+}
+
 /**
  * Resolve the durable (source + issue) target a Decisions row would train
  * against, or `null` when the row is not trainable.
diff --git a/ui/src/pages/Training.tsx b/ui/src/pages/Training.tsx
index 751385455d..699a3c5b9d 100644
--- a/ui/src/pages/Training.tsx
+++ b/ui/src/pages/Training.tsx
@@ -14,6 +14,7 @@ import { Input } from "@/components/ui/input";
 import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
 import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
 import { Textarea } from "@/components/ui/textarea";
+import { decisionTrainingHref } from "@/lib/decisionTraining";
 import { queryKeys } from "@/lib/queryKeys";
 import { cn, formatDate, formatDateTime } from "@/lib/utils";
 
@@ -143,7 +144,7 @@ export function TrainingLibrary() {
           const projectName = projectNames.get(stringValue(issue, "projectId", "project_id") ?? "") ?? "No project";
           const edited = example.updatedAt !== example.createdAt;
           return (
-            <button key={example.id} type="button" onClick={() => navigate(`/training/${example.id}`)} className="grid w-full gap-3 border-t border-border px-4 py-4 text-left transition-colors first:border-t-0 hover:bg-muted/30 md:grid-cols-6 md:items-center md:gap-4">
+            <button key={example.id} type="button" onClick={() => navigate(decisionTrainingHref(example.id))} className="grid w-full gap-3 border-t border-border px-4 py-4 text-left transition-colors first:border-t-0 hover:bg-muted/30 md:grid-cols-6 md:items-center md:gap-4">
               <span className="min-w-0"><span className="block truncate text-sm font-medium">{decisionTitle(example, issueTitle)}</span><span className="mt-1 block truncate text-xs text-muted-foreground">{issueIdentifier} · {projectName} · {example.sourceKind.replaceAll("_", " ")}</span></span>
               <span className="text-sm capitalize">{outcomeLabel(example.decisionOutcome)}</span>
               <span className="font-mono text-xs text-muted-foreground">{example.snapshot.cutoff.commentCount} comments · {example.snapshot.runs.length} runs · {example.snapshot.code.commitSha?.slice(0, 9) ?? "no repo"}</span>
@@ -186,7 +187,7 @@ export function TrainingInspector() {
   useEffect(() => {
     if (example && !editing) setNotes(example.notes);
   }, [editing, example]);
-  useEffect(() => setBreadcrumbs([{ label: "Decisions", href: "/decisions" }, { label: "Training", href: "/training" }, { label: example ? decisionTitle(example) : "Example" }]), [example, setBreadcrumbs]);
+  useEffect(() => setBreadcrumbs([{ label: "Decisions", href: "/decisions" }, { label: "Training", href: decisionTrainingHref() }, { label: example ? decisionTitle(example) : "Example" }]), [example, setBreadcrumbs]);
   const saveMutation = useMutation({
     mutationFn: () => decisionTrainingApi.updateNotes(id, notes.trim()),
     onSuccess: (updated) => {
@@ -210,7 +211,7 @@ export function TrainingInspector() {
   const issueIdentifier = stringValue(example.snapshot.issue, "identifier") ?? example.issueId.slice(0, 8);
   return (
     <div className="mx-auto flex w-full max-w-7xl flex-col gap-6 px-4 py-6 sm:px-6">
-      <header className="flex flex-col gap-4 sm:flex-row sm:items-start sm:justify-between"><div className="min-w-0"><Button variant="ghost" size="sm" className="mb-2 -ml-2" onClick={() => navigate("/training")}><ArrowLeft className="size-4" /> Training</Button><h1 className="truncate text-xl font-bold">{decisionTitle(example)}</h1><p className="mt-1 text-sm text-muted-foreground">{issueIdentifier} · {outcomeLabel(example.decisionOutcome)} · cutoff {formatDateTime(example.cutoffAt)}</p></div><Button variant="outline" onClick={() => downloadExport(example.companyId)}><Download className="size-4" /> Export JSONL</Button></header>
+      <header className="flex flex-col gap-4 sm:flex-row sm:items-start sm:justify-between"><div className="min-w-0"><Button variant="ghost" size="sm" className="mb-2 -ml-2" onClick={() => navigate(decisionTrainingHref())}><ArrowLeft className="size-4" /> Training</Button><h1 className="truncate text-xl font-bold">{decisionTitle(example)}</h1><p className="mt-1 text-sm text-muted-foreground">{issueIdentifier} · {outcomeLabel(example.decisionOutcome)} · cutoff {formatDateTime(example.cutoffAt)}</p></div><Button variant="outline" onClick={() => downloadExport(example.companyId)}><Download className="size-4" /> Export JSONL</Button></header>
       <div className="grid gap-8 lg:grid-cols-2">
         <section><div className="mb-3 flex items-center justify-between"><div><h2 className="text-sm font-semibold">Training notes</h2><p className="mt-1 text-xs text-muted-foreground">Last edited {formatDateTime(example.updatedAt)} · edits are versioned</p></div>{!editing ? <Button variant="ghost" size="sm" onClick={() => setEditing(true)}>Edit</Button> : null}</div>{editing ? <div className="space-y-3"><Textarea value={notes} onChange={(event) => setNotes(event.target.value)} className="min-h-72" /><div className="flex justify-end gap-2"><Button variant="ghost" onClick={() => { setNotes(example.notes); setEditing(false); }}>Cancel</Button><Button onClick={() => saveMutation.mutate()} disabled={saveMutation.isPending || notes.trim() === example.notes}>Save notes</Button></div></div> : <p className="whitespace-pre-wrap text-sm leading-relaxed">{example.notes || "No notes recorded."}</p>}</section>
         <section className="min-w-0"><div className="mb-3 flex items-center justify-between"><h2 className="text-sm font-semibold">Frozen state</h2><span className="font-mono text-xs text-muted-foreground">read-only</span></div><Tabs defaultValue="thread"><TabsList variant="line" className="w-full justify-start overflow-x-auto"><TabsTrigger value="thread">Thread</TabsTrigger><TabsTrigger value="issue">Issue</TabsTrigger><TabsTrigger value="runs">Runs</TabsTrigger><TabsTrigger value="code">Code</TabsTrigger><TabsTrigger value="decision">Decision</TabsTrigger></TabsList><TabsContent value="thread"><TrainingThreadPanel example={example} liveComments={commentsQuery.data ?? []} /></TabsContent><TabsContent value="issue"><JsonPanel value={example.snapshot.issue} /></TabsContent><TabsContent value="runs"><JsonPanel value={example.snapshot.runs} /></TabsContent><TabsContent value="code"><JsonPanel value={example.snapshot.code} /></TabsContent><TabsContent value="decision"><JsonPanel value={example.snapshot.decision} /></TabsContent></Tabs></section>
diff --git a/ui/src/pages/WhatNeedsMe.tsx b/ui/src/pages/WhatNeedsMe.tsx
index 4a3d3ea19e..ded932a7b9 100644
--- a/ui/src/pages/WhatNeedsMe.tsx
+++ b/ui/src/pages/WhatNeedsMe.tsx
@@ -36,6 +36,7 @@ import {
   type AttentionGroupBy,
   type AttentionSortOrder,
 } from "../lib/attention";
+import { decisionTrainingHref } from "../lib/decisionTraining";
 import { cn } from "../lib/utils";
 import { hasBlockingShortcutDialog, resolveAttentionQueueKeyAction } from "../lib/keyboardShortcuts";
 import { PageSkeleton } from "../components/PageSkeleton";
@@ -423,12 +424,7 @@ export function WhatNeedsMe() {
   return (
     <div ref={rootRef} className="max-w-3xl space-y-4">
       <div className="flex items-center justify-between gap-2">
-        <div className="flex items-center justify-between gap-4">
-          <h1 className="text-xl font-bold">Decisions</h1>
-          <Button variant="outline" size="sm" onClick={() => navigate("/training")}>
-            <GraduationCap className="size-4" /> Training
-          </Button>
-        </div>
+        <h1 className="text-xl font-bold">Decisions</h1>
         <div className="flex items-center gap-2">
           {visibleCount > 0 && (
             <span className="text-sm text-muted-foreground">
@@ -490,6 +486,17 @@ export function WhatNeedsMe() {
               </div>
             </PopoverContent>
           </Popover>
+          <Button
+            type="button"
+            variant="outline"
+            size="icon"
+            className="h-8 w-8 shrink-0"
+            title="Training"
+            aria-label="Training"
+            onClick={() => navigate(decisionTrainingHref())}
+          >
+            <GraduationCap className="h-3.5 w-3.5" />
+          </Button>
           {/* Sort */}
           <Popover>
             <PopoverTrigger asChild>