diff --git a/.github/workflows/fuzzy-ci-helpers/create_diff.ml b/.github/fuzzy-ci-helpers/create_diff.ml
similarity index 100%
rename from .github/workflows/fuzzy-ci-helpers/create_diff.ml
rename to .github/fuzzy-ci-helpers/create_diff.ml
diff --git a/.github/workflows/fuzzy-ci-helpers/irmin.3.9.0.opam.locked b/.github/workflows/fuzzy-ci-helpers/irmin.3.9.0.opam.locked
deleted file mode 100644
index 5001009582..0000000000
--- a/.github/workflows/fuzzy-ci-helpers/irmin.3.9.0.opam.locked
+++ /dev/null
@@ -1,773 +0,0 @@
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-  "cppo" {= "1.6.9" & ?vendor}
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-  "logs" {= "0.7.0+dune2" & ?vendor}
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-      "sha512=d8ebe40f42b598a9bd99f1ef4b00ba93458385a4accd121af66a0bf3b3f8d7135f576740adf1a43081dd409977c2219fd4bdbb5b3d1308890d301d553ed49900"
-    ]
-  ]
-  [
-    "https://github.com/tarides/tezos-base58/releases/download/1.0.0/tezos-base58-1.0.0.tbz"
-    "tezos-base58"
-    [
-      "sha256=aa99e1c25e3394cc8b01daeba54369f376348553fd2254beedd5f8569cbb8293"
-      "sha512=17415f5731a5e321043b21f67ca541a2ef5fe7e94fa7a7652164324a02176f3abb18163f8954659cd5470611346688f39be1154850e90a8df08f637bbd972ef1"
-    ]
-  ]
-]
-x-opam-monorepo-root-packages: ["irmin" "irmin-pack" "irmin-tezos"]
-x-opam-monorepo-version: "0.3"
diff --git a/.github/workflows/fuzzy-ci.yml b/.github/workflows/fuzzy-ci.yml
index 19e6344c44..0ad7cf02bb 100644
--- a/.github/workflows/fuzzy-ci.yml
+++ b/.github/workflows/fuzzy-ci.yml
@@ -26,9 +26,6 @@ env:
   FULL_DATA_FILE: full_responses.json
   DISTILLED_DATA_FILE: distilled_data.json
 
-  # The label name also needs to be consistant across jobs
-  LABEL_NAME: fuzzy-diff-looks-good
-
   # GitHub API related short-hands:
   GH_API_COMMENTS: ${{ github.event.pull_request.comments_url }}
   GH_API_LABELS: ${{ github.event.pull_request.issue_url }}/labels
@@ -101,7 +98,7 @@ jobs:
         opam exec -- dune install -p merlin-lib,dot-merlin-reader,merlin
 
     - name: Pull irmin and its deps from cache if possible
-      uses: actions/cache@v2
+      uses: actions/cache@v3
       id: irmin-cache
       with:
         path: irmin/
@@ -123,10 +120,7 @@ jobs:
     - name: Get Irmin's lock files
       if: steps.irmin-cache.outputs.cache-hit != 'true'
       run: |
-        # If the lock files are updated in the PR, use the updated lock files on both branches to avoid diffs due to dependency upgrades.
-        git checkout ${{ github.sha }}
-        # (TODO: Think about if this is the right workflow. Would this work on a compiler bump? If not, delete the line above.)
-        cp .github/workflows/fuzzy-ci-helpers/irmin.3.9.0.opam.locked irmin/irmin.opam.locked
+        cp .github/fuzzy-ci-helpers/irmin.3.9.0.opam.locked irmin/irmin.opam.locked
 
     - name: Install opam monorepo
       if: steps.irmin-cache.outputs.cache-hit != 'true'
@@ -160,7 +154,7 @@ jobs:
       working-directory: irmin
 
     - name: Pull merl-an from cache if possible
-      uses: actions/cache@v2
+      uses: actions/cache@v3
       id: merl-an-cache
       with:
         path: /usr/local/bin/merl-an
@@ -201,9 +195,10 @@ jobs:
       run: |
         # Taking advantage that ocamlopt is installed on this runner: compile the diff tool here and share it with the next job where it's needed.
         # All GH runners are hosted on x86 machines and all jobs in this workflow declare the same OS, so this should workTM.
-        opam exec -- ocamlopt -o create_diff .github/workflows/fuzzy-ci-helpers/create_diff.ml
+        opam exec -- ocamlopt -o create_diff .github/fuzzy-ci-helpers/create_diff.ml
 
     - name: Upload diff tool
+      if: ${{ matrix.commit == 'merge_branch' }}
       uses: actions/upload-artifact@v3
       with:
         name: diff_tool
@@ -293,13 +288,14 @@ jobs:
     name: Evaluate diffs
     runs-on: ubuntu-22.04
     needs: diff
-    permissions:
-      pull-requests: write
     env:
       earlier_diff_was_approved: ${{ contains(github.event.pull_request.labels.*.name, 'fuzzy-diff-looks-good') }}
       current_diff_exists: ${{ needs.diff.outputs.diff_exits }}
       diff_dir: ${{ needs.artifact_names.outputs.diff_dir }}
     steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
       - name: Download current diff(s)
         if: ${{ env.current_diff_exists == 'true' }}
         uses: actions/download-artifact@v3
@@ -308,17 +304,16 @@ jobs:
 
       - name: Retreive hash of approved diff
         if: ${{ env.earlier_diff_was_approved == 'true' }}
-        env:
-          # FIXME: Avoid hard-coding the message start. Instead, factor out the msg the CI writes on the PR and take its first line.
-          msg_start: "This PR changes the response of some of the `ocamlmerlin` queries"
         id: approved_diff_info
         run: |
+          msg_start=$(head -c 50 .github/fuzzy-ci-helpers/msg.txt)
           # FIXME: This will give a wrong result, if the PR has more than 100 comments before the last diff approval (lack of paging)
-          body=$(curl -s "$GH_API_COMMENTS?per_page=100" | jq --arg msg_start "$msg_start" 'map(select(.body | startswith($msg_start))) | max_by(.'created_by') | .body' | tee -a)
+          body=$(curl -s "$GH_API_COMMENTS?per_page=100" | jq --arg msg_start "$msg_start" 'map(select((.body | startswith($msg_start)) and .user.login == "github-actions[bot]")) | max_by(.'created_by') | .body')
           hash=$(echo "$body" | jq -r | grep '256-sha' | awk '{print $NF}')
           echo "hash='$hash'" | tee -a $GITHUB_OUTPUT
 
       - name: Return
+        id: return
         env:
           github_api_labels_url: ${{ github.event.pull_request.base.repo.url }}/issues/${{ github.event.pull_request.number }}/labels
         run: |
@@ -332,6 +327,7 @@ jobs:
           }
 
           # FIXME (?): Are nested conditionals always so ugly in Bash, or is there a better way? Option types and the possibility to match would help a lot.
+          LABEL_NAME=$(cat .github/fuzzy-ci-helpers/label_name.txt)
           if $earlier_diff_was_approved; then
             echo "Earlier diff was approved."
             current_diff_hash=$(sha256sum "$FULL_DIFF_FILE" | awk '{print $1}')
@@ -344,7 +340,8 @@ jobs:
               There's a head of the new diffs printed above. The whole diffs can be downloaded from $CURRENT_ACTION_URL.\n\
               Previous sha256: ${{ steps.approved_diff_info.outputs.hash }}\n\
               Current sha256: $current_diff_hash"
-              status=$(curl -sL -w "%{http_code}" -o output.txt -X DELETE -H "Authorization: Bearer $TOKEN" "$GH_API_LABELS/$LABEL_NAME")
+              echo "delete_label=true" >> $GITHUB_OUTPUT
+              # We'd like to exit with 1 here, but delay it until after the instruction to delete the label has been uploaded.
             fi
           else
             if $current_diff_exists; then
@@ -357,6 +354,28 @@ jobs:
             fi
           fi
 
+      - name: Write instruction to delete PR label
+        # When this workflow is triggered by a PR from a fork, it doesn't have
+        # the permissions to delete PR labels. Instead, we forward the
+        # instruction to delete the label to fuzzy-ci-privileged.yml.
+        if: ${{ steps.return.outputs.delete_label == 'true' }}
+        run: |
+          mkdir -p ./forward
+          jq -n \
+            --arg instruction "delete_label" \
+            --arg endpoint "$GH_API_LABELS" \
+            '{instruction: $instruction, endpoint: $endpoint}' > ./forward/instruction.json
+
+      - name: Upload instruction to delete label
+        if: ${{ steps.return.outputs.delete_label == 'true' }}
+        uses: actions/upload-artifact@v3
+        with:
+          name: forwarded_instructions
+          path: forward/
+
+      - name: Upload instruction to delete label
+        if: ${{ steps.return.outputs.delete_label == 'true' }}
+        run: exit 1
 
 
   approve:
@@ -366,8 +385,6 @@ jobs:
       github.event.action == 'labeled' &&
       github.event.label.name == 'fuzzy-diff-looks-good'
     runs-on: ubuntu-22.04
-    permissions:
-      pull-requests: write
     steps:
       - name: Retreive diff artifact meta-data
         id: diff_metadata
@@ -378,20 +395,37 @@ jobs:
           echo "id=$id" | tee -a $GITHUB_OUTPUT
           workflow_run=$(echo "$diff_artifact" | jq ".workflow_run | .id")
           echo "workflow_run=$workflow_run" | tee -a $GITHUB_OUTPUT
-
-      - name: Check if diff exists
-        env:
-          id: ${{ steps.diff_metadata.outputs.id }}
-        run: |
-          # FIXME (?)
           if [ -z $id ]; then
-            printf "You seem to have tried to approve a diff that doesn't exist yet.\nWait for the diff to have been generated and then try again."
-            status=$(curl -sL -w "%{http_code}" -o output.txt -X DELETE -H "Authorization: Bearer $TOKEN" "$GH_API_LABELS/$LABEL_NAME")
-            exit 1
+            echo "exists=false" | tee -a $GITHUB_OUTPUT
           else
-            echo "Diff has been approved."
+            echo "exists=true" | tee -a $GITHUB_OUTPUT
           fi
 
+      - name: Write instruction to delete PR label
+        # When this workflow is triggered by a PR from a fork, it doesn't have
+        # the permissions to delete PR labels. Instead, we forward the
+        # instruction to delete the label to fuzzy-ci-privileged.yml.
+        if: ${{ steps.diff_metadata.outputs.exists == 'false' }}
+        run: |
+          mkdir -p ./forward
+          jq -n \
+            --arg instruction "delete_label" \
+            --arg endpoint "$GH_API_LABELS" \
+            '{instruction: $instruction, endpoint: $endpoint}' > ./forward/instruction.json
+
+      - name: Upload instruction to delete label
+        if: ${{ steps.diff_metadata.outputs.exists == 'false' }}
+        uses: actions/upload-artifact@v3
+        with:
+          name: forwarded_instructions
+          path: forward/
+
+      - name: Fail due to diff not existing yet
+        if: ${{ steps.diff_metadata.outputs.exists == 'false' }}
+        run: |
+          printf "You seem to have tried to approve a diff that doesn't exist yet.\nWait for the diff to have been generated and then try again."
+          exit 1
+
       - name: Download diff
         env:
           id: ${{ steps.diff_metadata.outputs.id }}
@@ -409,20 +443,24 @@ jobs:
           hash=$(sha256sum "$FULL_DIFF_FILE" | awk '{print $1}')
           echo "hash=$hash" | tee -a $GITHUB_OUTPUT
 
-      - name: Write HTTP body to file
+      - name: Write instruction to comment on PR
+        # When this workflow is triggered by a PR from a fork, it doesn't have
+        # the permissions to comment on PRs. Instead, we forward the
+        # instruction to comment on the PR to fuzzy-ci-privileged.yml.
         env:
           approved_diffs_workflow_run: ${{ steps.diff_metadata.outputs.workflow_run }}
           approved_diffs_hash: ${{ steps.diff_hash.outputs.hash }}
         run: |
-          msg=$( cat <<EOF
-          This PR changes the response of some of the `ocamlmerlin` queries, that were run and analyzed by the [Merlin Fuzzy CI](https://github.com/ocaml/merlin/wiki/Merlin-Fuzzy-CI). The change is not considered a regression, the analyzis of this PR has been approved in its following state:
-          - URL to download the generated data sets and their diffs between PR base branch and merge branch (at the moment of approval): $ACTIONS_RUNS_ENDPOINT/$approved_diffs_workflow_run
-          - 256-sha of full reponses diff: $approved_diffs_hash
-          EOF
-          )
-          jq -n --arg msg "$msg" '{ body: $msg }' | tee -a body.json
-
-      - name: Write comment on PR
-        run: |
-          curl -LsX POST -H "Authorization: Bearer $TOKEN" -d @body.json "$GH_API_COMMENTS"
-          echo $?
+          mkdir -p ./forward
+          jq -n \
+            --arg instruction "comment" \
+            --arg endpoint "$GH_API_COMMENTS" \
+            --arg artifacts_url "$ACTIONS_RUNS_ENDPOINT/$approved_diffs_workflow_run" \
+            --arg hash "$approved_diffs_hash" \
+            '{instruction: $instruction, endpoint: $endpoint, artifacts_url: $artifacts_url, hash: $hash}' > ./forward/instruction.json
+
+      - name: Upload instruction to comment on PR
+        uses: actions/upload-artifact@v3
+        with:
+          name: forwarded_instructions
+          path: forward/