diff --git a/.github/WORKFLOWS.md b/.github/WORKFLOWS.md
index 40a91304c54..e06bc7a3fff 100644
--- a/.github/WORKFLOWS.md
+++ b/.github/WORKFLOWS.md
@@ -236,14 +236,6 @@ parallelism). See the `--build-via-mcp` section in
 | PR merged to `release/*`           | `release-publish.yml`          |
 | PR closed with `codespace-preview` | `util-codespace-preview.yml`   |
 
-### Manual Triggers (PR Comments)
-
-| Command            | Workflow                     | Permissions         |
-|--------------------|------------------------------|---------------------|
-| `/test-workflows`  | `test-workflows-callable.yml`| admin/write/maintain|
-
-**Why:** Re-run tests without pushing commits. Useful for flaky test investigation.
-
 ### Label Triggers
 
 | Label                 | Workflow                     | Effect                                             |
@@ -454,10 +446,6 @@ test-sbom-nightly.yml
 
 test-workflows-nightly.yml  (manual dispatch only — nightly schedule disabled, DEVP-544)
     └──────────────────────────▶  test-workflows-callable.yml
-
-PR Comment Dispatchers (triggered by /command in PR comments):
-test-workflows-pr-comment.yml
-    └──────────────────────────▶  test-workflows-callable.yml
 ```
 
 ---
@@ -1267,12 +1255,6 @@ Adding a new channel requires inviting the bot first; the first run otherwise fa
 
 ## Future Vision
 
-### Redundancy Review
-
-Comment trigger (`/test-workflows`) is a workaround.
-
-Long-term: Main CI should be reliable enough to not need these.
-
 ### Workflow Testability
 
 - Tools like `act` for local testing
diff --git a/.github/workflows/test-workflows-pr-comment.yml b/.github/workflows/test-workflows-pr-comment.yml
deleted file mode 100644
index 4135cb2149e..00000000000
--- a/.github/workflows/test-workflows-pr-comment.yml
+++ /dev/null
@@ -1,110 +0,0 @@
-name: 'Test: Workflows PR Comment'
-
-on:
-  issue_comment:
-    types: [created]
-
-permissions:
-  pull-requests: read
-  contents: read
-
-jobs:
-  handle_comment_command:
-    name: Handle /test-workflows Command
-    if: github.event.issue.pull_request && startsWith(github.event.comment.body, '/test-workflows')
-    runs-on: ubuntu-latest
-    outputs:
-      permission_granted: ${{ steps.pr_check_and_details.outputs.permission_granted }}
-      git_ref: ${{ steps.pr_check_and_details.outputs.head_sha }}
-      pr_number: ${{ steps.pr_check_and_details.outputs.pr_number_string }}
-
-    steps:
-      - name: Validate User, Get PR Details, and React
-        id: pr_check_and_details
-        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8
-        with:
-          github-token: ${{ secrets.GITHUB_TOKEN }}
-          script: |
-            const commenter = context.actor;
-            const issueOwner = context.repo.owner;
-            const issueRepo = context.repo.repo;
-            const commentId = context.payload.comment.id;
-            const prNumber = context.issue.number; // In issue_comment on a PR, issue.number is the PR number
-
-            // Function to add a reaction to the comment
-            async function addReaction(content) {
-              try {
-                await github.rest.reactions.createForIssueComment({
-                  owner: issueOwner,
-                  repo: issueRepo,
-                  comment_id: commentId,
-                  content: content
-                });
-              } catch (reactionError) {
-                // Log if reaction fails but don't fail the script for this
-                console.log(`Failed to add reaction '${content}': ${reactionError.message}`);
-              }
-            }
-
-            // Initialize outputs to a non-triggering state
-            core.setOutput('permission_granted', 'false');
-            core.setOutput('head_sha', '');
-            core.setOutput('pr_number_string', '');
-
-            // 1. Check user permissions
-            try {
-              const { data: permissions } = await github.rest.repos.getCollaboratorPermissionLevel({
-                owner: issueOwner,
-                repo: issueRepo,
-                username: commenter
-              });
-
-              const allowedPermissions = ['admin', 'write', 'maintain'];
-              if (!allowedPermissions.includes(permissions.permission)) {
-                console.log(`User @${commenter} has '${permissions.permission}' permission. Needs 'admin', 'write', or 'maintain'.`);
-                await addReaction('-1'); // User does not have permission
-                return; // Exit script, tests will not be triggered
-              }
-              console.log(`User @${commenter} has '${permissions.permission}' permission.`);
-            } catch (error) {
-              console.log(`Could not verify permissions for @${commenter}: ${error.message}`);
-              await addReaction('confused'); // Error checking permissions
-              return; // Exit script
-            }
-
-            // 2. Fetch PR details (if permission check passed)
-            let headSha;
-            try {
-              const { data: pr } = await github.rest.pulls.get({
-                owner: issueOwner,
-                repo: issueRepo,
-                pull_number: prNumber,
-              });
-              headSha = pr.head.sha;
-              console.log(`Workspaced PR details: SHA - ${headSha}, PR Number - ${prNumber}`);
-
-              // Set outputs for the next job
-              core.setOutput('permission_granted', 'true');
-              core.setOutput('head_sha', headSha);
-              core.setOutput('pr_number_string', prNumber.toString());
-              await addReaction('+1'); // Command accepted, tests will be triggered
-
-            } catch (error) {
-              console.log(`Failed to fetch PR details for PR #${prNumber}: ${error.message}`);
-              core.setOutput('permission_granted', 'false'); // Ensure this is false if PR fetch fails
-              await addReaction('confused'); // Error fetching PR details
-            }
-
-  trigger_reusable_tests:
-    name: Trigger Reusable Test Workflow
-    needs: handle_comment_command
-
-    if: >
-      always() &&
-      needs.handle_comment_command.result != 'skipped' &&
-      needs.handle_comment_command.outputs.permission_granted == 'true' &&
-      needs.handle_comment_command.outputs.git_ref != ''
-    uses: ./.github/workflows/test-workflows-callable.yml
-    with:
-      git_ref: ${{ needs.handle_comment_command.outputs.git_ref }}
-    secrets: inherit
diff --git a/.poutine.yml b/.poutine.yml
index 79061f0c1b0..fe587eb41d6 100644
--- a/.poutine.yml
+++ b/.poutine.yml
@@ -52,8 +52,8 @@ skip:
       # Uses merge commit SHA from GitHub - the code has already been reviewed
       # and merged, not arbitrary PR code.
       - .github/workflows/test-unit-reusable.yml
-      # Permission-gated: only maintainers (admin/write/maintain) can trigger
-      # via /test-workflows comment. Verified in test-workflows-pr-comment.yml.
+      # Reachable only from test-workflows-nightly.yml, which is
+      # workflow_dispatch-only, so the ref comes from a maintainer, not a PR.
       - .github/workflows/test-workflows-callable.yml
       # Reusable workflow reachable only via workflow_dispatch (manual) or from
       # ci-mcp-evals.yml, which is itself workflow_dispatch-only — never from a