diff --git a/src/main/artifacts/artifact-create-intent-store.test.ts b/src/main/artifacts/artifact-create-intent-store.test.ts
index 70cdbec4bb1..f512f5ab439 100644
--- a/src/main/artifacts/artifact-create-intent-store.test.ts
+++ b/src/main/artifacts/artifact-create-intent-store.test.ts
@@ -274,9 +274,12 @@ describe('artifact create intent store', () => {
     ).toThrow(/unsupported format/)
   })
 
-  it('persists a 5 MiB escaped artifact within the recovery limit', async () => {
+  it('persists an escaped artifact within the recovery limit', async () => {
     const userDataPath = await createUserDataPath()
-    const nearLimitBody = { ...body, content: '"'.repeat(ARTIFACT_MAX_CONTENT_BYTES) }
+    const nearLimitBody = {
+      ...body,
+      content: '"'.repeat(Math.floor(ARTIFACT_MAX_CONTENT_BYTES / 2))
+    }
     expect(
       artifactWriteRequestByteLength({ sourceKey: '/repo/report.html', ...nearLimitBody })
     ).toBeLessThanOrEqual(ARTIFACT_MAX_REQUEST_BYTES)
@@ -307,7 +310,7 @@ describe('artifact create intent store', () => {
         'key-a',
         { ...body, content: 'x'.repeat(ARTIFACT_MAX_CONTENT_BYTES + 1) }
       )
-    ).toThrow(/5 MiB limit/)
+    ).toThrow(/10 MiB limit/)
   })
 
   it('rejects a recovery body whose escaped request exceeds the transport budget', async () => {
diff --git a/src/main/artifacts/artifact-create-intent-store.ts b/src/main/artifacts/artifact-create-intent-store.ts
index 8816f5e1d97..02869245ebd 100644
--- a/src/main/artifacts/artifact-create-intent-store.ts
+++ b/src/main/artifacts/artifact-create-intent-store.ts
@@ -207,7 +207,7 @@ export function getOrCreateArtifactCreateIntent(
   body: ArtifactWriteBody
 ): ArtifactCreateIntent {
   if (artifactContentByteLength(body.content) > ARTIFACT_MAX_CONTENT_BYTES) {
-    throw new Error('Artifact content exceeds the 5 MiB limit.')
+    throw new Error('Artifact content exceeds the 10 MiB limit.')
   }
   if (artifactIntentRequestByteLength(sourceKey, body) > ARTIFACT_MAX_REQUEST_BYTES) {
     throw new Error('Artifact create recovery record exceeds the supported size.')
diff --git a/src/main/runtime/rpc/methods/artifacts.test.ts b/src/main/runtime/rpc/methods/artifacts.test.ts
index 478e5b030d5..f08db1e0c88 100644
--- a/src/main/runtime/rpc/methods/artifacts.test.ts
+++ b/src/main/runtime/rpc/methods/artifacts.test.ts
@@ -46,7 +46,7 @@ describe('artifact RPC schemas', () => {
     ).toBe(false)
   })
 
-  it('accepts a 5 MiB UTF-8 artifact at the content boundary', () => {
+  it('accepts a 10 MiB UTF-8 artifact at the content boundary', () => {
     expect(
       writeSchema('artifacts.publish').safeParse({
         ...validRequest,
@@ -56,7 +56,9 @@ describe('artifact RPC schemas', () => {
   })
 
   it('measures the content boundary in UTF-8 bytes', () => {
-    const exact = `${'€'.repeat(Math.floor(ARTIFACT_MAX_CONTENT_BYTES / 3))}aa`
+    const euroCount = Math.floor(ARTIFACT_MAX_CONTENT_BYTES / 3)
+    const asciiBytes = ARTIFACT_MAX_CONTENT_BYTES - euroCount * 3
+    const exact = `${'€'.repeat(euroCount)}${'a'.repeat(asciiBytes)}`
     const oversized = `${exact}€`
     expect(new TextEncoder().encode(exact).byteLength).toBe(ARTIFACT_MAX_CONTENT_BYTES)
     expect(new TextEncoder().encode(oversized).byteLength).toBeGreaterThan(
@@ -70,11 +72,11 @@ describe('artifact RPC schemas', () => {
     ).toBe(false)
   })
 
-  it('allows JSON escaping within the bounded 5 MiB content request', () => {
+  it('allows JSON escaping within the bounded content request', () => {
     expect(
       writeSchema('artifacts.publish').safeParse({
         ...validRequest,
-        content: '"'.repeat(ARTIFACT_MAX_CONTENT_BYTES)
+        content: '"'.repeat(Math.floor(ARTIFACT_MAX_CONTENT_BYTES / 2))
       }).success
     ).toBe(true)
   })
diff --git a/src/main/runtime/rpc/methods/artifacts.ts b/src/main/runtime/rpc/methods/artifacts.ts
index ace49a53ed3..4b5d7b5ab3a 100644
--- a/src/main/runtime/rpc/methods/artifacts.ts
+++ b/src/main/runtime/rpc/methods/artifacts.ts
@@ -30,7 +30,7 @@ const WriteRequest = z
       .min(1)
       .max(ARTIFACT_MAX_CONTENT_BYTES)
       .refine((content) => artifactContentByteLength(content) <= ARTIFACT_MAX_CONTENT_BYTES, {
-        message: 'Artifact content exceeds the 5 MiB limit.'
+        message: 'Artifact content exceeds the 10 MiB limit.'
       }),
     contentType: z.enum(['text/html', 'text/markdown']),
     fileName: z.string().min(1).max(512),
diff --git a/src/renderer/src/components/artifacts/artifact-publish-flow.test.ts b/src/renderer/src/components/artifacts/artifact-publish-flow.test.ts
index e962b435476..f966c9bed13 100644
--- a/src/renderer/src/components/artifacts/artifact-publish-flow.test.ts
+++ b/src/renderer/src/components/artifacts/artifact-publish-flow.test.ts
@@ -101,7 +101,7 @@ describe('artifact publish flow', () => {
     })
   })
 
-  it('publishes content at the 5 MiB boundary', async () => {
+  it('publishes content at the 10 MiB boundary', async () => {
     mocks.callRuntimeRpc.mockResolvedValue({ status: 'ok', value: published })
     const createRequest = vi.fn().mockResolvedValue({
       ...request,
diff --git a/src/renderer/src/components/browser-pane/describe-page/browser-artifact-upload.test.ts b/src/renderer/src/components/browser-pane/describe-page/browser-artifact-upload.test.ts
index a5708a04a4a..5490e8de27a 100644
--- a/src/renderer/src/components/browser-pane/describe-page/browser-artifact-upload.test.ts
+++ b/src/renderer/src/components/browser-pane/describe-page/browser-artifact-upload.test.ts
@@ -64,7 +64,7 @@ describe('browser artifact upload', () => {
     } satisfies Partial<ArtifactPublishPreparationError>)
   })
 
-  it('accepts a file whose stat is exactly at the 5 MiB boundary', async () => {
+  it('accepts a file whose stat is exactly at the 10 MiB boundary', async () => {
     stat.mockResolvedValueOnce({
       size: ARTIFACT_MAX_CONTENT_BYTES,
       isDirectory: false,
diff --git a/src/shared/artifacts.ts b/src/shared/artifacts.ts
index 3a65dbfe7ae..8ca4bd25b84 100644
--- a/src/shared/artifacts.ts
+++ b/src/shared/artifacts.ts
@@ -1,5 +1,5 @@
 /** Maximum UTF-8 bytes accepted for a manually shared artifact. */
-export const ARTIFACT_MAX_CONTENT_BYTES = 5 * 1024 * 1024
+export const ARTIFACT_MAX_CONTENT_BYTES = 10 * 1024 * 1024
 
 /** Legacy CLI/SSH envelope cap; those transports still have ~1 MiB control frames. */
 export const ARTIFACT_CLI_MAX_RPC_BYTES = 800 * 1024