diff --git a/document-generate/SKILL.md b/document-generate/SKILL.md
index 30846fc4d..f6b3b1a39 100644
--- a/document-generate/SKILL.md
+++ b/document-generate/SKILL.md
@@ -1194,7 +1194,7 @@ docs: generate [scope] documentation (Diataxis)
 
 Quadrants: [list which quadrants were produced]
 
-Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
+Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
 EOF
 )"
 ```
diff --git a/document-release/sections/release-body.md b/document-release/sections/release-body.md
index 0f05f13b5..00f344ae2 100644
--- a/document-release/sections/release-body.md
+++ b/document-release/sections/release-body.md
@@ -196,7 +196,7 @@ committing.
 git commit -m "$(cat <<'EOF'
 docs: update project documentation for vX.Y.Z.W
 
-Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
+Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
 EOF
 )"
 ```
diff --git a/hosts/claude.ts b/hosts/claude.ts
index f805da040..097fc1360 100644
--- a/hosts/claude.ts
+++ b/hosts/claude.ts
@@ -38,7 +38,7 @@ const claude: HostConfig = {
     linkingStrategy: 'real-dir-symlink',
   },
 
-  coAuthorTrailer: 'Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>',
+  coAuthorTrailer: 'Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>',
   learningsMode: 'full',
 };
 
diff --git a/scripts/resolvers/utility.ts b/scripts/resolvers/utility.ts
index 3d2e368a2..a6bfbbef7 100644
--- a/scripts/resolvers/utility.ts
+++ b/scripts/resolvers/utility.ts
@@ -369,7 +369,7 @@ Minimum 0 per category.
 export function generateCoAuthorTrailer(ctx: TemplateContext): string {
   const { getHostConfig } = require('../../hosts/index');
   const hostConfig = getHostConfig(ctx.host);
-  return hostConfig.coAuthorTrailer || 'Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>';
+  return hostConfig.coAuthorTrailer || 'Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>';
 }
 
 export function generateChangelogWorkflow(_ctx: TemplateContext): string {
diff --git a/ship/SKILL.md b/ship/SKILL.md
index eadffaa8f..acfe8e74e 100644
--- a/ship/SKILL.md
+++ b/ship/SKILL.md
@@ -1229,7 +1229,7 @@ user via AskUserQuestion rather than destroying non-WIP commits.
 git commit -m "$(cat <<'EOF'
 chore: bump version and changelog (vX.Y.Z.W)
 
-Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
+Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
 EOF
 )"
 ```
diff --git a/test/fixtures/golden/claude-ship-SKILL.md b/test/fixtures/golden/claude-ship-SKILL.md
index eadffaa8f..acfe8e74e 100644
--- a/test/fixtures/golden/claude-ship-SKILL.md
+++ b/test/fixtures/golden/claude-ship-SKILL.md
@@ -1229,7 +1229,7 @@ user via AskUserQuestion rather than destroying non-WIP commits.
 git commit -m "$(cat <<'EOF'
 chore: bump version and changelog (vX.Y.Z.W)
 
-Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
+Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
 EOF
 )"
 ```