diff --git a/__generated__/gql/gql.ts b/__generated__/gql/gql.ts
index 86395ee1..bb411e88 100644
--- a/__generated__/gql/gql.ts
+++ b/__generated__/gql/gql.ts
@@ -20,6 +20,8 @@ type Documents = {
     "\n  mutation AddComment($subjectId: ID!, $body: String!) {\n    addComment(input: {subjectId: $subjectId, body: $body}) {\n      commentEdge {\n        node {\n          id\n        }\n      }\n    }\n  }\n": typeof types.AddCommentDocument,
     "\n  query PullRequestNodeId($owner: String!, $repo: String!, $number: Int!) {\n    repository(owner: $owner, name: $repo) {\n      pullRequest(number: $number) {\n        id\n      }\n    }\n  }\n": typeof types.PullRequestNodeIdDocument,
     "\n  query PullRequestNodeIdByBranch(\n    $owner: String!\n    $repo: String!\n    $headRefName: String!\n  ) {\n    repository(owner: $owner, name: $repo) {\n      pullRequests(first: 1, states: [OPEN], headRefName: $headRefName) {\n        nodes {\n          id\n        }\n      }\n    }\n  }\n": typeof types.PullRequestNodeIdByBranchDocument,
+    "\n  query PullRequestComments($prNodeId: ID!, $first: Int!) {\n    node(id: $prNodeId) {\n      ... on PullRequest {\n        comments(first: $first, orderBy: {field: UPDATED_AT, direction: DESC}) {\n          nodes {\n            id\n            body\n            author {\n              login\n            }\n          }\n        }\n      }\n    }\n  }\n": typeof types.PullRequestCommentsDocument,
+    "\n  mutation UpdateComment($id: ID!, $body: String!) {\n    updateIssueComment(input: {id: $id, body: $body}) {\n      issueComment {\n        id\n      }\n    }\n  }\n": typeof types.UpdateCommentDocument,
     "\n  mutation CreateGitHubDeployment(\n    $repositoryId: ID!\n    $environmentName: String!\n    $refId: ID!\n    $payload: String!\n    $description: String\n  ) {\n    createDeployment(\n      input: {\n        autoMerge: false\n        description: $description\n        environment: $environmentName\n        refId: $refId\n        repositoryId: $repositoryId\n        requiredContexts: []\n        payload: $payload\n      }\n    ) {\n      deployment {\n        ...DeploymentFragment\n      }\n    }\n  }\n": typeof types.CreateGitHubDeploymentDocument,
     "\n  mutation DeleteGitHubDeployment($deploymentId: ID!) {\n    deleteDeployment(input: {id: $deploymentId}) {\n      clientMutationId\n    }\n  }\n": typeof types.DeleteGitHubDeploymentDocument,
     "\n  mutation DeleteGitHubDeploymentAndComment(\n    $deploymentId: ID!\n    $commentId: ID!\n  ) {\n    deleteDeployment(input: {id: $deploymentId}) {\n      clientMutationId\n    }\n    deleteIssueComment(input: {id: $commentId}) {\n      clientMutationId\n    }\n  }\n": typeof types.DeleteGitHubDeploymentAndCommentDocument,
@@ -35,6 +37,8 @@ const documents: Documents = {
     "\n  mutation AddComment($subjectId: ID!, $body: String!) {\n    addComment(input: {subjectId: $subjectId, body: $body}) {\n      commentEdge {\n        node {\n          id\n        }\n      }\n    }\n  }\n": types.AddCommentDocument,
     "\n  query PullRequestNodeId($owner: String!, $repo: String!, $number: Int!) {\n    repository(owner: $owner, name: $repo) {\n      pullRequest(number: $number) {\n        id\n      }\n    }\n  }\n": types.PullRequestNodeIdDocument,
     "\n  query PullRequestNodeIdByBranch(\n    $owner: String!\n    $repo: String!\n    $headRefName: String!\n  ) {\n    repository(owner: $owner, name: $repo) {\n      pullRequests(first: 1, states: [OPEN], headRefName: $headRefName) {\n        nodes {\n          id\n        }\n      }\n    }\n  }\n": types.PullRequestNodeIdByBranchDocument,
+    "\n  query PullRequestComments($prNodeId: ID!, $first: Int!) {\n    node(id: $prNodeId) {\n      ... on PullRequest {\n        comments(first: $first, orderBy: {field: UPDATED_AT, direction: DESC}) {\n          nodes {\n            id\n            body\n            author {\n              login\n            }\n          }\n        }\n      }\n    }\n  }\n": types.PullRequestCommentsDocument,
+    "\n  mutation UpdateComment($id: ID!, $body: String!) {\n    updateIssueComment(input: {id: $id, body: $body}) {\n      issueComment {\n        id\n      }\n    }\n  }\n": types.UpdateCommentDocument,
     "\n  mutation CreateGitHubDeployment(\n    $repositoryId: ID!\n    $environmentName: String!\n    $refId: ID!\n    $payload: String!\n    $description: String\n  ) {\n    createDeployment(\n      input: {\n        autoMerge: false\n        description: $description\n        environment: $environmentName\n        refId: $refId\n        repositoryId: $repositoryId\n        requiredContexts: []\n        payload: $payload\n      }\n    ) {\n      deployment {\n        ...DeploymentFragment\n      }\n    }\n  }\n": types.CreateGitHubDeploymentDocument,
     "\n  mutation DeleteGitHubDeployment($deploymentId: ID!) {\n    deleteDeployment(input: {id: $deploymentId}) {\n      clientMutationId\n    }\n  }\n": types.DeleteGitHubDeploymentDocument,
     "\n  mutation DeleteGitHubDeploymentAndComment(\n    $deploymentId: ID!\n    $commentId: ID!\n  ) {\n    deleteDeployment(input: {id: $deploymentId}) {\n      clientMutationId\n    }\n    deleteIssueComment(input: {id: $commentId}) {\n      clientMutationId\n    }\n  }\n": types.DeleteGitHubDeploymentAndCommentDocument,
@@ -65,6 +69,14 @@ export function graphql(source: "\n  query PullRequestNodeId($owner: String!, $r
  * The graphql function is used to parse GraphQL queries into a document that can be used by GraphQL clients.
  */
 export function graphql(source: "\n  query PullRequestNodeIdByBranch(\n    $owner: String!\n    $repo: String!\n    $headRefName: String!\n  ) {\n    repository(owner: $owner, name: $repo) {\n      pullRequests(first: 1, states: [OPEN], headRefName: $headRefName) {\n        nodes {\n          id\n        }\n      }\n    }\n  }\n"): typeof import('./graphql.js').PullRequestNodeIdByBranchDocument;
+/**
+ * The graphql function is used to parse GraphQL queries into a document that can be used by GraphQL clients.
+ */
+export function graphql(source: "\n  query PullRequestComments($prNodeId: ID!, $first: Int!) {\n    node(id: $prNodeId) {\n      ... on PullRequest {\n        comments(first: $first, orderBy: {field: UPDATED_AT, direction: DESC}) {\n          nodes {\n            id\n            body\n            author {\n              login\n            }\n          }\n        }\n      }\n    }\n  }\n"): typeof import('./graphql.js').PullRequestCommentsDocument;
+/**
+ * The graphql function is used to parse GraphQL queries into a document that can be used by GraphQL clients.
+ */
+export function graphql(source: "\n  mutation UpdateComment($id: ID!, $body: String!) {\n    updateIssueComment(input: {id: $id, body: $body}) {\n      issueComment {\n        id\n      }\n    }\n  }\n"): typeof import('./graphql.js').UpdateCommentDocument;
 /**
  * The graphql function is used to parse GraphQL queries into a document that can be used by GraphQL clients.
  */
diff --git a/__generated__/gql/graphql.ts b/__generated__/gql/graphql.ts
index 290debb2..95f635d9 100644
--- a/__generated__/gql/graphql.ts
+++ b/__generated__/gql/graphql.ts
@@ -103,6 +103,31 @@ export type PullRequestNodeIdByBranchQueryVariables = Exact<{
 
 export type PullRequestNodeIdByBranchQuery = { readonly repository: { readonly pullRequests: { readonly nodes: ReadonlyArray<{ readonly id: string } | null> | null } } | null };
 
+export type PullRequestCommentsQueryVariables = Exact<{
+  prNodeId: string | number;
+  first: number;
+}>;
+
+
+export type PullRequestCommentsQuery = { readonly node:
+    | { readonly comments: { readonly nodes: ReadonlyArray<{ readonly id: string, readonly body: string, readonly author:
+            | { readonly login: string }
+            | { readonly login: string }
+            | { readonly login: string }
+            | { readonly login: string }
+            | { readonly login: string }
+           | null } | null> | null } }
+    | Record<PropertyKey, never>
+   | null };
+
+export type UpdateCommentMutationVariables = Exact<{
+  id: string | number;
+  body: string;
+}>;
+
+
+export type UpdateCommentMutation = { readonly updateIssueComment: { readonly issueComment: { readonly id: string } | null } | null };
+
 export type CreateGitHubDeploymentMutationVariables = Exact<{
   repositoryId: string | number;
   environmentName: string;
@@ -260,6 +285,32 @@ export const PullRequestNodeIdByBranchDocument = new TypedDocumentString(`
   }
 }
     `) as unknown as TypedDocumentString<PullRequestNodeIdByBranchQuery, PullRequestNodeIdByBranchQueryVariables>;
+export const PullRequestCommentsDocument = new TypedDocumentString(`
+    query PullRequestComments($prNodeId: ID!, $first: Int!) {
+  node(id: $prNodeId) {
+    ... on PullRequest {
+      comments(first: $first, orderBy: {field: UPDATED_AT, direction: DESC}) {
+        nodes {
+          id
+          body
+          author {
+            login
+          }
+        }
+      }
+    }
+  }
+}
+    `) as unknown as TypedDocumentString<PullRequestCommentsQuery, PullRequestCommentsQueryVariables>;
+export const UpdateCommentDocument = new TypedDocumentString(`
+    mutation UpdateComment($id: ID!, $body: String!) {
+  updateIssueComment(input: {id: $id, body: $body}) {
+    issueComment {
+      id
+    }
+  }
+}
+    `) as unknown as TypedDocumentString<UpdateCommentMutation, UpdateCommentMutationVariables>;
 export const CreateGitHubDeploymentDocument = new TypedDocumentString(`
     mutation CreateGitHubDeployment($repositoryId: ID!, $environmentName: String!, $refId: ID!, $payload: String!, $description: String) {
   createDeployment(
diff --git a/__tests__/common/github/comment.test.ts b/__tests__/common/github/comment.test.ts
index 4225a022..ced414f0 100644
--- a/__tests__/common/github/comment.test.ts
+++ b/__tests__/common/github/comment.test.ts
@@ -7,6 +7,8 @@ import type {MockApi} from '@/tests/helpers/api.js'
 import {
   addComment,
   MutationAddComment,
+  MutationUpdateComment,
+  QueryPullRequestComments,
   QueryPullRequestNodeId,
   QueryPullRequestNodeIdByBranch
 } from '@/common/github/comment.js'
@@ -40,7 +42,7 @@ describe(addComment, () => {
           query: MutationAddComment,
           variables: {
             subjectId: 'MDExOlB1bGxSZXF1ZXN0Mjc5MTQ3NDM3',
-            body: '## Cloudflare Pages Deployment\n**Event Name:** pull_request\n**Environment:** production\n**Project:** cloudflare-pages-action\n**Built with commit:** mock-github-sha\n**Preview URL:** https://206e215c.cloudflare-pages-action-a5z.pages.dev\n**Branch Preview URL:** https://unknown-branch.cloudflare-pages-action-a5z.pages.dev\n\n### Wrangler Output\nsuccess'
+            body: '<!-- cloudflare-pages-deployment-comment -->\n## Cloudflare Pages Deployment\n**Event Name:** pull_request\n**Environment:** production\n**Project:** cloudflare-pages-action\n**Built with commit:** mock-github-sha\n**Preview URL:** https://206e215c.cloudflare-pages-action-a5z.pages.dev\n**Branch Preview URL:** https://unknown-branch.cloudflare-pages-action-a5z.pages.dev\n\n### Wrangler Output\nsuccess'
           }
         },
         {
@@ -133,7 +135,7 @@ describe(addComment, () => {
           query: MutationAddComment,
           variables: {
             subjectId: 'MDExOlB1bGxSZXF1ZXN0Mjc5MTQ3NDM3',
-            body: '## Cloudflare Pages Deployment\n**Event Name:** workflow_run\n**Environment:** production\n**Project:** cloudflare-pages-action\n**Built with commit:** 3484a3fb816e0859fd6e1cea078d76385ff50625\n**Preview URL:** https://206e215c.cloudflare-pages-action-a5z.pages.dev\n**Branch Preview URL:** https://unknown-branch.cloudflare-pages-action-a5z.pages.dev\n\n### Wrangler Output\nsuccess'
+            body: '<!-- cloudflare-pages-deployment-comment -->\n## Cloudflare Pages Deployment\n**Event Name:** workflow_run\n**Environment:** production\n**Project:** cloudflare-pages-action\n**Built with commit:** 3484a3fb816e0859fd6e1cea078d76385ff50625\n**Preview URL:** https://206e215c.cloudflare-pages-action-a5z.pages.dev\n**Branch Preview URL:** https://unknown-branch.cloudflare-pages-action-a5z.pages.dev\n\n### Wrangler Output\nsuccess'
           }
         },
         {
@@ -217,7 +219,9 @@ describe(addComment, () => {
         gitHubApiToken: 'mock-github-token',
         gitHubEnvironment: undefined,
         prNumber: '123',
-        wranglerVersion: 'mock-wrangler-version'
+        wranglerVersion: 'mock-wrangler-version',
+        commentMode: 'new',
+        hideWranglerOutput: false
       })
 
       vi.spyOn(Context, 'useContextEvent').mockReturnValue({
@@ -266,7 +270,7 @@ describe(addComment, () => {
           query: MutationAddComment,
           variables: {
             subjectId: 'MDExOlB1bGxSZXF1ZXN0Mjc5MTQ3NDM3',
-            body: '## Cloudflare Pages Deployment\n**Event Name:** workflow_dispatch\n**Environment:** production\n**Project:** cloudflare-pages-action\n**Built with commit:** mock-github-sha\n**Preview URL:** https://206e215c.cloudflare-pages-action-a5z.pages.dev\n**Branch Preview URL:** https://unknown-branch.cloudflare-pages-action-a5z.pages.dev\n\n### Wrangler Output\nsuccess'
+            body: '<!-- cloudflare-pages-deployment-comment -->\n## Cloudflare Pages Deployment\n**Event Name:** workflow_dispatch\n**Environment:** production\n**Project:** cloudflare-pages-action\n**Built with commit:** mock-github-sha\n**Preview URL:** https://206e215c.cloudflare-pages-action-a5z.pages.dev\n**Branch Preview URL:** https://unknown-branch.cloudflare-pages-action-a5z.pages.dev\n\n### Wrangler Output\nsuccess'
           }
         },
         {
@@ -295,7 +299,9 @@ describe(addComment, () => {
         gitHubApiToken: 'mock-github-token',
         gitHubEnvironment: undefined,
         prNumber: 'abc',
-        wranglerVersion: 'mock-wrangler-version'
+        wranglerVersion: 'mock-wrangler-version',
+        commentMode: 'new',
+        hideWranglerOutput: false
       })
 
       await expect(addComment(mockData, 'success')).rejects.toThrow(
@@ -354,7 +360,7 @@ describe(addComment, () => {
           query: MutationAddComment,
           variables: {
             subjectId: 'MDExOlB1bGxSZXF1ZXN0Mjc5MTQ3NDM3',
-            body: '## Cloudflare Pages Deployment\n**Event Name:** workflow_dispatch\n**Environment:** production\n**Project:** cloudflare-pages-action\n**Built with commit:** mock-github-sha\n**Preview URL:** https://206e215c.cloudflare-pages-action-a5z.pages.dev\n**Branch Preview URL:** https://unknown-branch.cloudflare-pages-action-a5z.pages.dev\n\n### Wrangler Output\nsuccess'
+            body: '<!-- cloudflare-pages-deployment-comment -->\n## Cloudflare Pages Deployment\n**Event Name:** workflow_dispatch\n**Environment:** production\n**Project:** cloudflare-pages-action\n**Built with commit:** mock-github-sha\n**Preview URL:** https://206e215c.cloudflare-pages-action-a5z.pages.dev\n**Branch Preview URL:** https://unknown-branch.cloudflare-pages-action-a5z.pages.dev\n\n### Wrangler Output\nsuccess'
           }
         },
         {
@@ -448,4 +454,173 @@ describe(addComment, () => {
       }
     )
   })
+
+  describe('comment-mode: update', () => {
+    test('should update existing comment when comment-mode is update', async () => {
+      expect.assertions(1)
+
+      vi.spyOn(CommonInputs, 'useCommonInputs').mockReturnValue({
+        cloudflareApiToken: 'mock-cloudflare-api-token',
+        gitHubApiToken: 'mock-github-token',
+        gitHubEnvironment: undefined,
+        prNumber: undefined,
+        wranglerVersion: 'mock-wrangler-version',
+        commentMode: 'update',
+        hideWranglerOutput: false
+      })
+
+      // Mock finding existing comment
+      mockApi.interceptGithub(
+        {
+          query: QueryPullRequestComments,
+          variables: {
+            prNodeId: 'MDExOlB1bGxSZXF1ZXN0Mjc5MTQ3NDM3',
+            first: 50
+          }
+        },
+        {
+          data: {
+            node: {
+              comments: {
+                nodes: [
+                  {
+                    id: 'existing-comment-id',
+                    body: '<!-- cloudflare-pages-deployment-comment -->\n## Old deployment',
+                    author: {
+                      login: 'github-actions[bot]'
+                    }
+                  }
+                ]
+              }
+            }
+          }
+        }
+      )
+
+      // Mock updating the comment
+      mockApi.interceptGithub(
+        {
+          query: MutationUpdateComment,
+          variables: {
+            id: 'existing-comment-id',
+            body: '<!-- cloudflare-pages-deployment-comment -->\n## Cloudflare Pages Deployment\n**Event Name:** pull_request\n**Environment:** production\n**Project:** cloudflare-pages-action\n**Built with commit:** mock-github-sha\n**Preview URL:** https://206e215c.cloudflare-pages-action-a5z.pages.dev\n**Branch Preview URL:** https://unknown-branch.cloudflare-pages-action-a5z.pages.dev\n\n### Wrangler Output\nsuccess'
+          }
+        },
+        {
+          data: {
+            updateIssueComment: {
+              issueComment: {
+                id: 'existing-comment-id'
+              }
+            }
+          }
+        }
+      )
+
+      const comment = await addComment(mockData, 'success')
+
+      expect(comment).toBe('existing-comment-id')
+    })
+
+    test('should create new comment when no existing comment found in update mode', async () => {
+      expect.assertions(1)
+
+      vi.spyOn(CommonInputs, 'useCommonInputs').mockReturnValue({
+        cloudflareApiToken: 'mock-cloudflare-api-token',
+        gitHubApiToken: 'mock-github-token',
+        gitHubEnvironment: undefined,
+        prNumber: undefined,
+        wranglerVersion: 'mock-wrangler-version',
+        commentMode: 'update',
+        hideWranglerOutput: false
+      })
+
+      // Mock finding no existing comments
+      mockApi.interceptGithub(
+        {
+          query: QueryPullRequestComments,
+          variables: {
+            prNodeId: 'MDExOlB1bGxSZXF1ZXN0Mjc5MTQ3NDM3',
+            first: 50
+          }
+        },
+        {
+          data: {
+            node: {
+              comments: {
+                nodes: []
+              }
+            }
+          }
+        }
+      )
+
+      // Mock creating new comment
+      mockApi.interceptGithub(
+        {
+          query: MutationAddComment,
+          variables: {
+            subjectId: 'MDExOlB1bGxSZXF1ZXN0Mjc5MTQ3NDM3',
+            body: '<!-- cloudflare-pages-deployment-comment -->\n## Cloudflare Pages Deployment\n**Event Name:** pull_request\n**Environment:** production\n**Project:** cloudflare-pages-action\n**Built with commit:** mock-github-sha\n**Preview URL:** https://206e215c.cloudflare-pages-action-a5z.pages.dev\n**Branch Preview URL:** https://unknown-branch.cloudflare-pages-action-a5z.pages.dev\n\n### Wrangler Output\nsuccess'
+          }
+        },
+        {
+          data: {
+            addComment: {
+              commentEdge: {
+                node: {
+                  id: 'new-comment-id'
+                }
+              }
+            }
+          }
+        }
+      )
+
+      const comment = await addComment(mockData, 'success')
+
+      expect(comment).toBe('new-comment-id')
+    })
+  })
+
+  describe('hide-wrangler-output', () => {
+    test('should hide wrangler output when hideWranglerOutput is true', async () => {
+      expect.assertions(1)
+
+      vi.spyOn(CommonInputs, 'useCommonInputs').mockReturnValue({
+        cloudflareApiToken: 'mock-cloudflare-api-token',
+        gitHubApiToken: 'mock-github-token',
+        gitHubEnvironment: undefined,
+        prNumber: undefined,
+        wranglerVersion: 'mock-wrangler-version',
+        commentMode: 'new',
+        hideWranglerOutput: true
+      })
+
+      mockApi.interceptGithub(
+        {
+          query: MutationAddComment,
+          variables: {
+            subjectId: 'MDExOlB1bGxSZXF1ZXN0Mjc5MTQ3NDM3',
+            body: '<!-- cloudflare-pages-deployment-comment -->\n## Cloudflare Pages Deployment\n**Event Name:** pull_request\n**Environment:** production\n**Project:** cloudflare-pages-action\n**Built with commit:** mock-github-sha\n**Preview URL:** https://206e215c.cloudflare-pages-action-a5z.pages.dev\n**Branch Preview URL:** https://unknown-branch.cloudflare-pages-action-a5z.pages.dev'
+          }
+        },
+        {
+          data: {
+            addComment: {
+              commentEdge: {
+                node: {
+                  id: '1'
+                }
+              }
+            }
+          }
+        }
+      )
+
+      const comment = await addComment(mockData, 'success')
+
+      expect(comment).toBe('1')
+    })
+  })
 })
diff --git a/__tests__/common/inputs.test.ts b/__tests__/common/inputs.test.ts
index 20ffdfb4..3bf81011 100644
--- a/__tests__/common/inputs.test.ts
+++ b/__tests__/common/inputs.test.ts
@@ -4,7 +4,9 @@ import {
   INPUT_KEY_CLOUDFLARE_API_TOKEN,
   INPUT_KEY_GITHUB_ENVIRONMENT,
   INPUT_KEY_GITHUB_TOKEN,
-  INPUT_KEY_WRANGLER_VERSION
+  INPUT_KEY_WRANGLER_VERSION,
+  INPUT_KEY_COMMENT_MODE,
+  INPUT_KEY_HIDE_WRANGLER_OUTPUT
 } from '@/input-keys'
 import {stubInputEnv} from '@/tests/helpers/inputs.js'
 
@@ -56,7 +58,9 @@ describe('common', () => {
         gitHubApiToken: 'mock-github-token',
         gitHubEnvironment: 'mock-github-environment',
         prNumber: undefined,
-        wranglerVersion: 'mock-wrangler-version'
+        wranglerVersion: 'mock-wrangler-version',
+        commentMode: 'new',
+        hideWranglerOutput: false
       })
     })
 
@@ -73,7 +77,9 @@ describe('common', () => {
         gitHubApiToken: 'mock-github-token',
         gitHubEnvironment: undefined,
         prNumber: undefined,
-        wranglerVersion: packageJson.devDependencies.wrangler
+        wranglerVersion: packageJson.devDependencies.wrangler,
+        commentMode: 'new',
+        hideWranglerOutput: false
       })
     })
 
@@ -91,5 +97,68 @@ describe('common', () => {
         })
       )
     })
+
+    test('returns update comment mode when set', async () => {
+      expect.assertions(1)
+
+      stubInputEnv(INPUT_KEY_CLOUDFLARE_API_TOKEN)
+      stubInputEnv(INPUT_KEY_GITHUB_TOKEN)
+      stubInputEnv(INPUT_KEY_COMMENT_MODE, 'update')
+
+      const {useCommonInputs} = await setup()
+
+      expect(useCommonInputs()).toStrictEqual(
+        expect.objectContaining({
+          commentMode: 'update'
+        })
+      )
+    })
+
+    test('defaults to new comment mode for invalid values', async () => {
+      expect.assertions(1)
+
+      stubInputEnv(INPUT_KEY_CLOUDFLARE_API_TOKEN)
+      stubInputEnv(INPUT_KEY_GITHUB_TOKEN)
+      stubInputEnv(INPUT_KEY_COMMENT_MODE, 'invalid')
+
+      const {useCommonInputs} = await setup()
+
+      expect(useCommonInputs()).toStrictEqual(
+        expect.objectContaining({
+          commentMode: 'new'
+        })
+      )
+    })
+
+    test('hides wrangler output when set to true', async () => {
+      expect.assertions(1)
+
+      stubInputEnv(INPUT_KEY_CLOUDFLARE_API_TOKEN)
+      stubInputEnv(INPUT_KEY_GITHUB_TOKEN)
+      stubInputEnv(INPUT_KEY_HIDE_WRANGLER_OUTPUT, 'true')
+
+      const {useCommonInputs} = await setup()
+
+      expect(useCommonInputs()).toStrictEqual(
+        expect.objectContaining({
+          hideWranglerOutput: true
+        })
+      )
+    })
+
+    test('shows wrangler output by default', async () => {
+      expect.assertions(1)
+
+      stubInputEnv(INPUT_KEY_CLOUDFLARE_API_TOKEN)
+      stubInputEnv(INPUT_KEY_GITHUB_TOKEN)
+
+      const {useCommonInputs} = await setup()
+
+      expect(useCommonInputs()).toStrictEqual(
+        expect.objectContaining({
+          hideWranglerOutput: false
+        })
+      )
+    })
   })
 })
diff --git a/action.yml b/action.yml
index f137d72b..e3faa920 100644
--- a/action.yml
+++ b/action.yml
@@ -36,6 +36,14 @@ inputs:
   branch:
     description: 'Branch name to use for Cloudflare Pages deployment. If not set, the branch is automatically detected from the GitHub context.'
     required: false
+  comment-mode:
+    description: 'Comment mode for PR comments. "new" creates a new comment for each deployment (default). "update" updates the same comment for all deployments on the PR.'
+    required: false
+    default: 'new'
+  hide-wrangler-output:
+    description: 'Hide Wrangler CLI output from PR comments. Set to "true" to hide the output.'
+    required: false
+    default: 'false'
 
 outputs:
   id:
diff --git a/input-keys.ts b/input-keys.ts
index 982547c7..9723984c 100644
--- a/input-keys.ts
+++ b/input-keys.ts
@@ -9,6 +9,8 @@ export const INPUT_KEY_WORKING_DIRECTORY = 'working-directory'
 export const INPUT_KEYS_KEEP_LATEST = 'keep-latest'
 export const INPUT_KEY_WRANGLER_VERSION = 'wrangler-version'
 export const INPUT_KEY_BRANCH = 'branch'
+export const INPUT_KEY_COMMENT_MODE = 'comment-mode'
+export const INPUT_KEY_HIDE_WRANGLER_OUTPUT = 'hide-wrangler-output'
 
 export const INPUT_KEYS_REQUIRED = [
   INPUT_KEY_CLOUDFLARE_ACCOUNT_ID,
diff --git a/src/common/github/comment.ts b/src/common/github/comment.ts
index e1631059..114abd13 100644
--- a/src/common/github/comment.ts
+++ b/src/common/github/comment.ts
@@ -49,6 +49,70 @@ export const QueryPullRequestNodeIdByBranch = graphql(/* GraphQL */ `
   }
 `)
 
+export const QueryPullRequestComments = graphql(/* GraphQL */ `
+  query PullRequestComments($prNodeId: ID!, $first: Int!) {
+    node(id: $prNodeId) {
+      ... on PullRequest {
+        comments(first: $first, orderBy: {field: UPDATED_AT, direction: DESC}) {
+          nodes {
+            id
+            body
+            author {
+              login
+            }
+          }
+        }
+      }
+    }
+  }
+`)
+
+export const MutationUpdateComment = graphql(/* GraphQL */ `
+  mutation UpdateComment($id: ID!, $body: String!) {
+    updateIssueComment(input: {id: $id, body: $body}) {
+      issueComment {
+        id
+      }
+    }
+  }
+`)
+
+const COMMENT_MARKER = '<!-- cloudflare-pages-deployment-comment -->'
+
+const findExistingComment = async (
+  prNodeId: string
+): Promise<string | undefined> => {
+  try {
+    const result = await request({
+      query: QueryPullRequestComments,
+      variables: {
+        prNodeId,
+        first: 50
+      }
+    })
+
+    const node = result.data.node
+    if (!node || !('comments' in node)) {
+      return undefined
+    }
+
+    const comments = node.comments.nodes ?? []
+    const botLogin = 'github-actions[bot]'
+
+    // Find the most recent comment from this action that contains our marker
+    const existingComment = comments.find(
+      comment =>
+        comment?.author?.login === botLogin &&
+        comment?.body?.includes(COMMENT_MARKER)
+    )
+
+    return existingComment?.id
+  } catch {
+    // If we can't find existing comments, we'll just create a new one
+    return undefined
+  }
+}
+
 const getNodeIdFromEvent = async () => {
   const {repo} = useContext()
   const {prNumber} = useCommonInputs()
@@ -163,9 +227,36 @@ export const addComment = async (
   if (prNodeId) {
     const {sha} = useContext()
     const {eventName} = useContextEvent()
+    const {commentMode, hideWranglerOutput} = useCommonInputs()
+
+    // Build the comment body
+    let rawBody = `${COMMENT_MARKER}\n## Cloudflare Pages Deployment\n**Event Name:** ${eventName}\n**Environment:** ${deployment.environment}\n**Project:** ${deployment.project_name}\n**Built with commit:** ${sha}\n**Preview URL:** ${deployment.url}\n**Branch Preview URL:** ${getCloudflareDeploymentAlias(deployment)}`
+
+    // Optionally include Wrangler output
+    if (!hideWranglerOutput) {
+      rawBody += `\n\n### Wrangler Output\n${output}`
+    }
 
-    const rawBody = `## Cloudflare Pages Deployment\n**Event Name:** ${eventName}\n**Environment:** ${deployment.environment}\n**Project:** ${deployment.project_name}\n**Built with commit:** ${sha}\n**Preview URL:** ${deployment.url}\n**Branch Preview URL:** ${getCloudflareDeploymentAlias(deployment)}\n\n### Wrangler Output\n${output}`
+    // Check if we should update an existing comment or create a new one
+    if (commentMode === 'update') {
+      const existingCommentId = await findExistingComment(prNodeId)
+
+      if (existingCommentId) {
+        // Update existing comment
+        info('Updating existing PR comment')
+        await request({
+          query: MutationUpdateComment,
+          variables: {
+            id: existingCommentId,
+            body: rawBody
+          }
+        })
+        return existingCommentId
+      }
+    }
 
+    // Create new comment (either commentMode is 'new' or no existing comment found)
+    info('Creating new PR comment')
     const comment = await request({
       query: MutationAddComment,
       variables: {
diff --git a/src/common/inputs.ts b/src/common/inputs.ts
index 3c6cd60e..7dbdac01 100644
--- a/src/common/inputs.ts
+++ b/src/common/inputs.ts
@@ -5,7 +5,9 @@ import {
   INPUT_KEY_GITHUB_ENVIRONMENT,
   INPUT_KEY_PR_NUMBER,
   INPUT_KEY_GITHUB_TOKEN,
-  INPUT_KEY_WRANGLER_VERSION
+  INPUT_KEY_WRANGLER_VERSION,
+  INPUT_KEY_COMMENT_MODE,
+  INPUT_KEY_HIDE_WRANGLER_OUTPUT
 } from '@/input-keys'
 
 type Inputs = {
@@ -19,9 +21,18 @@ type Inputs = {
   prNumber?: string
   /** Wrangler version to use. */
   wranglerVersion: string
+  /** Comment mode: 'new' or 'update' */
+  commentMode: 'new' | 'update'
+  /** Whether to hide Wrangler output in PR comments */
+  hideWranglerOutput: boolean
 }
 
 const getInputs = (): Inputs => {
+  const commentMode =
+    getInput(INPUT_KEY_COMMENT_MODE, {required: false}) || 'new'
+  const hideWranglerOutputInput =
+    getInput(INPUT_KEY_HIDE_WRANGLER_OUTPUT, {required: false}) || 'false'
+
   return {
     cloudflareApiToken: getInput(INPUT_KEY_CLOUDFLARE_API_TOKEN, {
       required: true
@@ -30,7 +41,9 @@ const getInputs = (): Inputs => {
     gitHubEnvironment:
       getInput(INPUT_KEY_GITHUB_ENVIRONMENT, {required: false}) || undefined,
     prNumber: getInput(INPUT_KEY_PR_NUMBER, {required: false}) || undefined,
-    wranglerVersion: getInput(INPUT_KEY_WRANGLER_VERSION) || '4.86.0'
+    wranglerVersion: getInput(INPUT_KEY_WRANGLER_VERSION) || '4.86.0',
+    commentMode: commentMode === 'update' ? 'update' : 'new',
+    hideWranglerOutput: hideWranglerOutputInput.toLowerCase() === 'true'
   }
 }