diff --git a/.github/actions/github-actions.actionlint/action.yaml b/.github/actions/github-actions.actionlint/action.yaml
index 6b29361..3fce6d6 100644
--- a/.github/actions/github-actions.actionlint/action.yaml
+++ b/.github/actions/github-actions.actionlint/action.yaml
@@ -1,5 +1,5 @@
 name: GitHub Actions - actionlint
-description: Lint GitHub Actions workflow files with `actionlint`. On failure, the findings are added to the job summary. Requires the `actionlint` CLI on the `PATH`. When `shellcheck` is also on the `PATH`, `run` scripts are checked with it.
+description: Lint GitHub Actions workflow files with `jactionlint`, an actively maintained fork of `actionlint`. On failure, the findings are added to the job summary. Requires the `jactionlint` CLI on the `PATH`. When `shellcheck` is also on the `PATH`, `run` scripts are checked with it.
 
 
 inputs:
@@ -9,7 +9,11 @@ inputs:
     description: "(Optional) The directory holding the workflow files to lint. Only the `*.yml` and `*.yaml` files directly in it are linted, since GitHub only reads top-level workflow files. Defaults to `.github/workflows`."
   config_file:
     required: false
-    description: "(Optional) The path to the `actionlint` config file, relative to the repository root. When omitted, `actionlint` discovers `.github/actionlint.yaml` in the Git repository that holds the workflow files as usual; files outside a Git repository are linted without a config."
+    description: "(Optional) The path to the `jactionlint` config file, relative to the repository root. When omitted, `jactionlint` discovers `.github/jactionlint.yaml`, or the `.github/actionlint.yaml` of the original `actionlint`, in the Git repository that holds the workflow files; files outside a Git repository are linted without a config."
+  profile:
+    required: false
+    default: correctness
+    description: "(Optional) The `jactionlint` rule profile: `correctness` (the checks of the original `actionlint`), `default` or `pedantic`. Overrides the profile of the config file. Defaults to `correctness`."
   shellcheck_enabled:
     required: false
     default: "true"
@@ -17,21 +21,21 @@ inputs:
   annotations_enabled:
     required: false
     default: "true"
-    description: "(Optional) Whether to annotate the reported lines in the pull request when `actionlint` fails, by re-running it with a JSON format and turning each finding into a workflow error. Defaults to `true`."
+    description: "(Optional) Whether to annotate the reported lines in the pull request when `jactionlint` fails, by re-running it with the JSON format and turning each finding into a workflow command of its severity. Defaults to `true`."
 
 outputs:
   skipped:
     value: ${{ steps.target.outputs.skipped }}
-    description: "`true` when `target_dir` holds no workflow files and `actionlint` was not run. Empty otherwise."
+    description: "`true` when `target_dir` holds no workflow files and `jactionlint` was not run. Empty otherwise."
   stdout:
     value: ${{ steps.actionlint.outputs.stdout }}
-    description: "The STDOUT stream of the call to `actionlint`. Empty when skipped."
+    description: "The STDOUT stream of the call to `jactionlint`. Empty when skipped."
   stderr:
     value: ${{ steps.actionlint.outputs.stderr }}
-    description: "The STDERR stream of the call to `actionlint`. Empty when skipped."
+    description: "The STDERR stream of the call to `jactionlint`. Empty when skipped."
   exitcode:
     value: ${{ steps.actionlint.outputs.exitcode }}
-    description: "The exit code of the call to `actionlint`. Empty when skipped. The action still fails on a non-zero exit code, so use `continue-on-error: true` to inspect it."
+    description: "The exit code of the call to `jactionlint`. Empty when skipped. The action still fails on a non-zero exit code, so use `continue-on-error: true` to inspect it."
 
 
 runs:
@@ -49,8 +53,7 @@ runs:
       target_dir="${target_dir:-.}"
       echo "target_dir=$target_dir" >> "$GITHUB_OUTPUT"
 
-      # `actionlint` exits 3 when it finds no workflows directory, so an empty or missing target is skipped instead
-      # of failing; `find` would fail on a missing directory too.
+      # An empty or missing target is skipped instead of failing; `find` would fail on a missing directory too.
       files=""
       if [ -d "$target_dir" ]; then
         files=$(find "$target_dir" -maxdepth 1 -type f \( -name '*.yml' -o -name '*.yaml' \) | sort)
@@ -68,32 +71,33 @@ runs:
         echo "config=$(realpath "$CONFIG_FILE")" >> "$GITHUB_OUTPUT"
       fi
 
-      actionlint -version | head -n 1
+      jactionlint --version | head -n 1
 
-  - name: Run actionlint
+  - name: Run jactionlint
     id: actionlint
     if: steps.target.outputs.skipped != 'true'
     uses: tedilabs/github-actions/.github/actions/shell.run@main
     env:
       FILES: ${{ steps.target.outputs.files }}
       CONFIG: ${{ steps.target.outputs.config }}
+      PROFILE: ${{ inputs.profile }}
       SHELLCHECK_ENABLED: ${{ inputs.shellcheck_enabled }}
     with:
       run: |
-        args=(-no-color)
+        args=(--no-color "--profile=$PROFILE")
         if [ -n "$CONFIG" ]; then
-          args+=(-config-file "$CONFIG")
+          args+=("--config-file=$CONFIG")
         fi
         if [ "$SHELLCHECK_ENABLED" != "true" ]; then
-          args+=(-shellcheck=)
+          args+=(--shellcheck=)
         fi
 
-        # The files are passed explicitly; `actionlint` still discovers the config from the Git repository that holds them.
+        # The files are passed explicitly; `jactionlint` still discovers the config from the Git repository that holds them.
         readarray -t files <<< "$FILES"
-        actionlint "${args[@]}" "${files[@]}"
+        jactionlint "${args[@]}" "${files[@]}"
 
-  # GitHub only renders annotations from `::error` lines, so the findings are re-read as JSON. The files are passed
-  # repository-relative, and `actionlint` reports them as given.
+  # GitHub only renders annotations from workflow commands, so the findings are re-read as JSON. The files are passed
+  # repository-relative, and `jactionlint` reports them as given.
   - name: Annotate Findings
     id: actionlint-annotate
     if: always() && inputs.annotations_enabled == 'true' && steps.actionlint.outcome == 'failure'
@@ -101,24 +105,26 @@ runs:
     env:
       FILES: ${{ steps.target.outputs.files }}
       CONFIG: ${{ steps.target.outputs.config }}
+      PROFILE: ${{ inputs.profile }}
       SHELLCHECK_ENABLED: ${{ inputs.shellcheck_enabled }}
     run: |
-      args=(-no-color -format '{{json .}}')
+      args=(--no-color --format=json "--profile=$PROFILE")
       if [ -n "$CONFIG" ]; then
-        args+=(-config-file "$CONFIG")
+        args+=("--config-file=$CONFIG")
       fi
       if [ "$SHELLCHECK_ENABLED" != "true" ]; then
-        args+=(-shellcheck=)
+        args+=(--shellcheck=)
       fi
 
       # A workflow command takes one line, so newlines and the property separators are percent-encoded the way
       # the runner decodes them.
       readarray -t files <<< "$FILES"
-      actionlint "${args[@]}" "${files[@]}" 2>/dev/null | jq -r '
+      jactionlint "${args[@]}" "${files[@]}" 2>/dev/null | jq -r '
         def esc: gsub("%"; "%25") | gsub("\r"; "%0D") | gsub("\n"; "%0A");
         def prop: esc | gsub(":"; "%3A") | gsub(","; "%2C");
         .[]
-        | "::error file=\(.filepath),line=\(.line),col=\(.column)\(if (.end_column // 0) > 0 then ",endColumn=\(.end_column)" else "" end),title=\("actionlint · " + .kind | prop)::\(.message | esc)"
+        | ({"error": "error", "warn": "warning"}[.severity] // "notice") as $command
+        | "::\($command) file=\(.filepath),line=\(.line),col=\(.column)\(if (.end_column // 0) > 0 then ",endColumn=\(.end_column)" else "" end),title=\("jactionlint · " + (.id // .kind) | prop)::\(.message | esc)"
       ' || true
 
   - name: Add Failure Details to Job Summary
@@ -126,6 +132,6 @@ runs:
     if: always() && steps.actionlint.outcome == 'failure'
     uses: tedilabs/github-actions/.github/actions/github.step-summary@main
     with:
-      title: "❌ actionlint · ${{ steps.target.outputs.target_dir }}"
+      title: "❌ jactionlint · ${{ steps.target.outputs.target_dir }}"
       file: ${{ steps.actionlint.outputs.log_file }}
       lang: text
diff --git a/.github/workflows/github-actions.integration.yaml b/.github/workflows/github-actions.integration.yaml
index 2de6c3f..aed8d29 100644
--- a/.github/workflows/github-actions.integration.yaml
+++ b/.github/workflows/github-actions.integration.yaml
@@ -17,13 +17,13 @@ on:
       actionlint_version:
         type: string
         required: false
-        default: latest
-        description: "(Optional) The version of `actionlint` to install with mise. Defaults to `latest`."
+        default: "2.1.0"
+        description: "(Optional) The version of `jactionlint`, an actively maintained fork of `actionlint`, to install with mise. Pinned by default because its releases add checks. Defaults to `2.1.0`."
       shellcheck_version:
         type: string
         required: false
         default: latest
-        description: "(Optional) The version of `shellcheck` to install with mise. Used by `actionlint` to check `run` scripts. Defaults to `latest`."
+        description: "(Optional) The version of `shellcheck` to install with mise. Used by `jactionlint` to check `run` scripts. Defaults to `latest`."
       check_jsonschema_version:
         type: string
         required: false
@@ -34,16 +34,21 @@ on:
         type: boolean
         required: false
         default: true
-        description: "(Optional) Whether to lint workflow files with `actionlint`. Defaults to `true`."
+        description: "(Optional) Whether to lint workflow files with `jactionlint`. Defaults to `true`."
       actionlint_config_file:
         type: string
         required: false
-        description: "(Optional) The path to the `actionlint` config file, relative to the repository root. When omitted, `actionlint` discovers `.github/actionlint.yaml` as usual."
+        description: "(Optional) The path to the `jactionlint` config file, relative to the repository root. When omitted, `jactionlint` discovers `.github/jactionlint.yaml` or `.github/actionlint.yaml`."
+      actionlint_profile:
+        type: string
+        required: false
+        default: correctness
+        description: "(Optional) The `jactionlint` rule profile: `correctness` (the checks of the original `actionlint`), `default` or `pedantic`. Defaults to `correctness`."
       actionlint_shellcheck_enabled:
         type: boolean
         required: false
         default: true
-        description: "(Optional) Whether `actionlint` also checks `run` scripts with `shellcheck`. Defaults to `true`."
+        description: "(Optional) Whether `jactionlint` also checks `run` scripts with `shellcheck`. Defaults to `true`."
       check_jsonschema_enabled:
         type: boolean
         required: false
@@ -73,17 +78,18 @@ jobs:
       with:
         mise_toml: |
           [tools]
-          actionlint = "${{ inputs.actionlint_version }}"
+          jactionlint = "${{ inputs.actionlint_version }}"
           shellcheck = "${{ inputs.shellcheck_version }}"
           "pipx:check-jsonschema" = "${{ inputs.check_jsonschema_version }}"
 
-    - name: Lint (actionlint)
+    - name: Lint (jactionlint)
       id: actionlint
       if: inputs.actionlint_enabled
       continue-on-error: true
       uses: tedilabs/github-actions/.github/actions/github-actions.actionlint@main
       with:
         config_file: ${{ inputs.actionlint_config_file }}
+        profile: ${{ inputs.actionlint_profile }}
         shellcheck_enabled: ${{ inputs.actionlint_shellcheck_enabled }}
 
     - name: Validate Workflows (check-jsonschema)
@@ -115,7 +121,7 @@ jobs:
         # A check that ran but found no files reports `skipped`.
         results: |
           {
-            "actionlint": "${{ steps.actionlint.outputs.skipped == 'true' && 'skipped' || steps.actionlint.outcome }}",
+            "jactionlint": "${{ steps.actionlint.outputs.skipped == 'true' && 'skipped' || steps.actionlint.outcome }}",
             "check-jsonschema (workflows)": "${{ steps.check-jsonschema-workflows.outputs.skipped == 'true' && 'skipped' || steps.check-jsonschema-workflows.outcome }}",
             "check-jsonschema (actions)": "${{ steps.check-jsonschema-actions.outputs.skipped == 'true' && 'skipped' || steps.check-jsonschema-actions.outcome }}"
           }