diff --git a/.github/workflows/agentic-campaign-generator.lock.yml b/.github/workflows/agentic-campaign-generator.lock.yml
index 6973b9edd63..f728ee09c86 100644
--- a/.github/workflows/agentic-campaign-generator.lock.yml
+++ b/.github/workflows/agentic-campaign-generator.lock.yml
@@ -83,7 +83,7 @@ jobs:
         env:
           GH_AW_WORKFLOW_NAME: "Agentic Campaign Generator"
           GH_AW_LOCK_FOR_AGENT: "true"
-          GH_AW_SAFE_OUTPUT_MESSAGES: "{\"runStarted\":\"### :rocket: Campaign setup started\\nCreating a tracking Project and generating campaign files + orchestrator workflow.\\nNo action needed — the [{workflow_name}]({run_url}) will open a pull request and post the link + checklist back on this issue when ready.\\n\\u003e To stop this run: remove the label that started it.\\n\\u003e **Docs**: https://githubnext.github.io/gh-aw/guides/campaigns/getting-started/\",\"runSuccess\":\"### :white_check_mark: Campaign setup complete\\nTracking Project created and pull request with generated campaign files is ready.\\n**Next steps**: Review + merge the PR, then run the campaign from the Actions tab.\\n\\u003e **Docs**: https://githubnext.github.io/gh-aw/guides/campaigns/getting-started/\",\"runFailure\":\"### :x: Campaign setup {status}\\n**Common causes**:\\n- `GH_AW_PROJECT_GITHUB_TOKEN` is missing or invalid\\n- Token lacks access to GitHub Projects\\n**Action required**:\\n- Fix the first error in the logs\\n- Re-apply the label to re-run\\n\\u003e **Troubleshooting**: https://githubnext.github.io/gh-aw/guides/campaigns/flow/#when-something-goes-wrong\\n\\u003e **Docs**: https://githubnext.github.io/gh-aw/guides/campaigns/getting-started/\"}"
+          GH_AW_SAFE_OUTPUT_MESSAGES: "{\"appendOnlyComments\":true,\"runStarted\":\"### :rocket: Campaign setup started\\nCreating a tracking Project and generating campaign files + orchestrator workflow.\\nNo action needed — the [{workflow_name}]({run_url}) will open a pull request and post the link + checklist back on this issue when ready.\\n\\u003e To stop this run: remove the label that started it.\\n\\u003e **Docs**: https://githubnext.github.io/gh-aw/guides/campaigns/getting-started/\",\"runSuccess\":\"### :white_check_mark: Campaign setup complete\\nTracking Project created and pull request with generated campaign files is ready.\\n**Next steps**: Review + merge the PR, then run the campaign from the Actions tab.\\n\\u003e **Docs**: https://githubnext.github.io/gh-aw/guides/campaigns/getting-started/\",\"runFailure\":\"### :x: Campaign setup {status}\\n**Common causes**:\\n- `GH_AW_PROJECT_GITHUB_TOKEN` is missing or invalid\\n- Token lacks access to GitHub Projects\\n**Action required**:\\n- Fix the first error in the logs\\n- Re-apply the label to re-run\\n\\u003e **Troubleshooting**: https://githubnext.github.io/gh-aw/guides/campaigns/flow/#when-something-goes-wrong\\n\\u003e **Docs**: https://githubnext.github.io/gh-aw/guides/campaigns/getting-started/\"}"
         with:
           script: |
             const { setupGlobals } = require('/opt/gh-aw/actions/setup_globals.cjs');
@@ -1202,7 +1202,7 @@ jobs:
           GH_AW_SECRET_VERIFICATION_RESULT: ${{ needs.agent.outputs.secret_verification_result }}
           GH_AW_ASSIGNMENT_ERRORS: ${{ needs.safe_outputs.outputs.assign_to_agent_assignment_errors }}
           GH_AW_ASSIGNMENT_ERROR_COUNT: ${{ needs.safe_outputs.outputs.assign_to_agent_assignment_error_count }}
-          GH_AW_SAFE_OUTPUT_MESSAGES: "{\"runStarted\":\"### :rocket: Campaign setup started\\nCreating a tracking Project and generating campaign files + orchestrator workflow.\\nNo action needed — the [{workflow_name}]({run_url}) will open a pull request and post the link + checklist back on this issue when ready.\\n\\u003e To stop this run: remove the label that started it.\\n\\u003e **Docs**: https://githubnext.github.io/gh-aw/guides/campaigns/getting-started/\",\"runSuccess\":\"### :white_check_mark: Campaign setup complete\\nTracking Project created and pull request with generated campaign files is ready.\\n**Next steps**: Review + merge the PR, then run the campaign from the Actions tab.\\n\\u003e **Docs**: https://githubnext.github.io/gh-aw/guides/campaigns/getting-started/\",\"runFailure\":\"### :x: Campaign setup {status}\\n**Common causes**:\\n- `GH_AW_PROJECT_GITHUB_TOKEN` is missing or invalid\\n- Token lacks access to GitHub Projects\\n**Action required**:\\n- Fix the first error in the logs\\n- Re-apply the label to re-run\\n\\u003e **Troubleshooting**: https://githubnext.github.io/gh-aw/guides/campaigns/flow/#when-something-goes-wrong\\n\\u003e **Docs**: https://githubnext.github.io/gh-aw/guides/campaigns/getting-started/\"}"
+          GH_AW_SAFE_OUTPUT_MESSAGES: "{\"appendOnlyComments\":true,\"runStarted\":\"### :rocket: Campaign setup started\\nCreating a tracking Project and generating campaign files + orchestrator workflow.\\nNo action needed — the [{workflow_name}]({run_url}) will open a pull request and post the link + checklist back on this issue when ready.\\n\\u003e To stop this run: remove the label that started it.\\n\\u003e **Docs**: https://githubnext.github.io/gh-aw/guides/campaigns/getting-started/\",\"runSuccess\":\"### :white_check_mark: Campaign setup complete\\nTracking Project created and pull request with generated campaign files is ready.\\n**Next steps**: Review + merge the PR, then run the campaign from the Actions tab.\\n\\u003e **Docs**: https://githubnext.github.io/gh-aw/guides/campaigns/getting-started/\",\"runFailure\":\"### :x: Campaign setup {status}\\n**Common causes**:\\n- `GH_AW_PROJECT_GITHUB_TOKEN` is missing or invalid\\n- Token lacks access to GitHub Projects\\n**Action required**:\\n- Fix the first error in the logs\\n- Re-apply the label to re-run\\n\\u003e **Troubleshooting**: https://githubnext.github.io/gh-aw/guides/campaigns/flow/#when-something-goes-wrong\\n\\u003e **Docs**: https://githubnext.github.io/gh-aw/guides/campaigns/getting-started/\"}"
         with:
           github-token: ${{ secrets.GH_AW_GITHUB_TOKEN || secrets.GITHUB_TOKEN }}
           script: |
@@ -1221,7 +1221,7 @@ jobs:
           GH_AW_WORKFLOW_NAME: "Agentic Campaign Generator"
           GH_AW_AGENT_CONCLUSION: ${{ needs.agent.result }}
           GH_AW_DETECTION_CONCLUSION: ${{ needs.detection.result }}
-          GH_AW_SAFE_OUTPUT_MESSAGES: "{\"runStarted\":\"### :rocket: Campaign setup started\\nCreating a tracking Project and generating campaign files + orchestrator workflow.\\nNo action needed — the [{workflow_name}]({run_url}) will open a pull request and post the link + checklist back on this issue when ready.\\n\\u003e To stop this run: remove the label that started it.\\n\\u003e **Docs**: https://githubnext.github.io/gh-aw/guides/campaigns/getting-started/\",\"runSuccess\":\"### :white_check_mark: Campaign setup complete\\nTracking Project created and pull request with generated campaign files is ready.\\n**Next steps**: Review + merge the PR, then run the campaign from the Actions tab.\\n\\u003e **Docs**: https://githubnext.github.io/gh-aw/guides/campaigns/getting-started/\",\"runFailure\":\"### :x: Campaign setup {status}\\n**Common causes**:\\n- `GH_AW_PROJECT_GITHUB_TOKEN` is missing or invalid\\n- Token lacks access to GitHub Projects\\n**Action required**:\\n- Fix the first error in the logs\\n- Re-apply the label to re-run\\n\\u003e **Troubleshooting**: https://githubnext.github.io/gh-aw/guides/campaigns/flow/#when-something-goes-wrong\\n\\u003e **Docs**: https://githubnext.github.io/gh-aw/guides/campaigns/getting-started/\"}"
+          GH_AW_SAFE_OUTPUT_MESSAGES: "{\"appendOnlyComments\":true,\"runStarted\":\"### :rocket: Campaign setup started\\nCreating a tracking Project and generating campaign files + orchestrator workflow.\\nNo action needed — the [{workflow_name}]({run_url}) will open a pull request and post the link + checklist back on this issue when ready.\\n\\u003e To stop this run: remove the label that started it.\\n\\u003e **Docs**: https://githubnext.github.io/gh-aw/guides/campaigns/getting-started/\",\"runSuccess\":\"### :white_check_mark: Campaign setup complete\\nTracking Project created and pull request with generated campaign files is ready.\\n**Next steps**: Review + merge the PR, then run the campaign from the Actions tab.\\n\\u003e **Docs**: https://githubnext.github.io/gh-aw/guides/campaigns/getting-started/\",\"runFailure\":\"### :x: Campaign setup {status}\\n**Common causes**:\\n- `GH_AW_PROJECT_GITHUB_TOKEN` is missing or invalid\\n- Token lacks access to GitHub Projects\\n**Action required**:\\n- Fix the first error in the logs\\n- Re-apply the label to re-run\\n\\u003e **Troubleshooting**: https://githubnext.github.io/gh-aw/guides/campaigns/flow/#when-something-goes-wrong\\n\\u003e **Docs**: https://githubnext.github.io/gh-aw/guides/campaigns/getting-started/\"}"
         with:
           github-token: ${{ secrets.GH_AW_GITHUB_TOKEN || secrets.GITHUB_TOKEN }}
           script: |
@@ -1463,7 +1463,7 @@ jobs:
     timeout-minutes: 15
     env:
       GH_AW_ENGINE_ID: "claude"
-      GH_AW_SAFE_OUTPUT_MESSAGES: "{\"runStarted\":\"### :rocket: Campaign setup started\\nCreating a tracking Project and generating campaign files + orchestrator workflow.\\nNo action needed — the [{workflow_name}]({run_url}) will open a pull request and post the link + checklist back on this issue when ready.\\n\\u003e To stop this run: remove the label that started it.\\n\\u003e **Docs**: https://githubnext.github.io/gh-aw/guides/campaigns/getting-started/\",\"runSuccess\":\"### :white_check_mark: Campaign setup complete\\nTracking Project created and pull request with generated campaign files is ready.\\n**Next steps**: Review + merge the PR, then run the campaign from the Actions tab.\\n\\u003e **Docs**: https://githubnext.github.io/gh-aw/guides/campaigns/getting-started/\",\"runFailure\":\"### :x: Campaign setup {status}\\n**Common causes**:\\n- `GH_AW_PROJECT_GITHUB_TOKEN` is missing or invalid\\n- Token lacks access to GitHub Projects\\n**Action required**:\\n- Fix the first error in the logs\\n- Re-apply the label to re-run\\n\\u003e **Troubleshooting**: https://githubnext.github.io/gh-aw/guides/campaigns/flow/#when-something-goes-wrong\\n\\u003e **Docs**: https://githubnext.github.io/gh-aw/guides/campaigns/getting-started/\"}"
+      GH_AW_SAFE_OUTPUT_MESSAGES: "{\"appendOnlyComments\":true,\"runStarted\":\"### :rocket: Campaign setup started\\nCreating a tracking Project and generating campaign files + orchestrator workflow.\\nNo action needed — the [{workflow_name}]({run_url}) will open a pull request and post the link + checklist back on this issue when ready.\\n\\u003e To stop this run: remove the label that started it.\\n\\u003e **Docs**: https://githubnext.github.io/gh-aw/guides/campaigns/getting-started/\",\"runSuccess\":\"### :white_check_mark: Campaign setup complete\\nTracking Project created and pull request with generated campaign files is ready.\\n**Next steps**: Review + merge the PR, then run the campaign from the Actions tab.\\n\\u003e **Docs**: https://githubnext.github.io/gh-aw/guides/campaigns/getting-started/\",\"runFailure\":\"### :x: Campaign setup {status}\\n**Common causes**:\\n- `GH_AW_PROJECT_GITHUB_TOKEN` is missing or invalid\\n- Token lacks access to GitHub Projects\\n**Action required**:\\n- Fix the first error in the logs\\n- Re-apply the label to re-run\\n\\u003e **Troubleshooting**: https://githubnext.github.io/gh-aw/guides/campaigns/flow/#when-something-goes-wrong\\n\\u003e **Docs**: https://githubnext.github.io/gh-aw/guides/campaigns/getting-started/\"}"
       GH_AW_WORKFLOW_ID: "agentic-campaign-generator"
       GH_AW_WORKFLOW_NAME: "Agentic Campaign Generator"
     outputs:
diff --git a/.github/workflows/agentic-campaign-generator.md b/.github/workflows/agentic-campaign-generator.md
index 94f9352ccea..6df3ecf0b9b 100644
--- a/.github/workflows/agentic-campaign-generator.md
+++ b/.github/workflows/agentic-campaign-generator.md
@@ -58,6 +58,7 @@ safe-outputs:
     max: 10
     github-token: "${{ secrets.GH_AW_PROJECT_GITHUB_TOKEN }}"
   messages:
+    append-only-comments: true
     run-started: "### :rocket: Campaign setup started
 
 Creating a tracking Project and generating campaign files + orchestrator workflow.