diff --git a/.github/workflows/publish-ci-php-images.yml b/.github/workflows/publish-ci-php-images.yml
new file mode 100644
index 0000000..1ed239c
--- /dev/null
+++ b/.github/workflows/publish-ci-php-images.yml
@@ -0,0 +1,53 @@
+name: Publish shared CI PHP images
+
+on:
+  pull_request:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  packages: write
+
+concurrency:
+  group: codecorn-ci-image-publisher
+  cancel-in-progress: false
+
+jobs:
+  publish:
+    name: Build, verify and publish GHCR PHP/Playwright toolchains
+    runs-on: [self-hosted, Linux, X64, codecorn-org]
+    timeout-minutes: 120
+    if: github.repository == 'CodeCornTech/.github' && (github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository)
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
+      - name: Verify DKR-01 disk and build prerequisites
+        shell: bash
+        run: |
+          set -euo pipefail
+          test "$(hostname -s | tr '[:upper:]' '[:lower:]')" = dkr-01
+          docker info >/dev/null
+          bash ci/images/build.sh --dry-run
+
+      - name: Build container images
+        shell: bash
+        run: bash ci/images/build.sh --build
+
+      - name: Smoke-test PHP, Composer, Node and Playwright
+        shell: bash
+        run: bash ci/images/build.sh --check
+
+      - name: Authenticate only for GHCR publication
+        if: github.event_name == 'workflow_dispatch'
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Publish the five versioned images
+        if: github.event_name == 'workflow_dispatch'
+        shell: bash
+        run: printf 'PUBLISH\n' | bash ci/images/build.sh --publish
diff --git a/ci/images/Dockerfile b/ci/images/Dockerfile
new file mode 100644
index 0000000..d46f55c
--- /dev/null
+++ b/ci/images/Dockerfile
@@ -0,0 +1,43 @@
+# syntax=docker/dockerfile:1
+# Ubuntu Noble + maintained PHP packages (including legacy 8.1), Node 22 and Composer.
+# Build once per PHP minor; never install PHP from inside a CI job.
+ARG PHP_VERSION=8.3
+FROM node:22-bookworm-slim AS node
+FROM composer:2 AS composer
+FROM ubuntu:24.04 AS base
+ARG PHP_VERSION
+LABEL org.opencontainers.image.source="https://github.com/CodeCornTech/.github"
+ENV DEBIAN_FRONTEND=noninteractive COMPOSER_ALLOW_SUPERUSER=1 NODE_PATH=/usr/local/lib/node_modules
+RUN set -eux; \
+    apt-get update; \
+    apt-get install -y --no-install-recommends \
+      ca-certificates curl gnupg software-properties-common \
+      bash git zip unzip jq python3; \
+    add-apt-repository -y ppa:ondrej/php; \
+    apt-get update; \
+    apt-get install -y --no-install-recommends \
+      "php${PHP_VERSION}-cli" "php${PHP_VERSION}-zip" "php${PHP_VERSION}-bcmath" \
+      "php${PHP_VERSION}-intl" "php${PHP_VERSION}-mbstring" \
+      "php${PHP_VERSION}-sqlite3" "php${PHP_VERSION}-pgsql" \
+      "php${PHP_VERSION}-mysql" "php${PHP_VERSION}-xml" \
+      "php${PHP_VERSION}-curl"; \
+    ln -s "/usr/bin/php${PHP_VERSION}" /usr/local/bin/php; \
+    apt-get clean; \
+    rm -rf /var/lib/apt/lists/*
+COPY --from=node /usr/local/bin/node /usr/local/bin/node
+COPY --from=node /usr/local/lib/node_modules/ /usr/local/lib/node_modules/
+COPY --from=composer /usr/bin/composer /usr/local/bin/composer
+RUN ln -s /usr/local/lib/node_modules/npm/bin/npm-cli.js /usr/local/bin/npm \
+    && ln -s /usr/local/lib/node_modules/npm/bin/npx-cli.js /usr/local/bin/npx \
+    && php -v && node -v && npm -v && composer --version
+WORKDIR /workspace
+
+FROM base AS ci
+
+FROM base AS playwright
+ARG PLAYWRIGHT_VERSION=1.62.1
+ENV PLAYWRIGHT_BROWSERS_PATH=/ms-playwright \
+    PLAYWRIGHT_MODULE=/usr/local/lib/node_modules/playwright
+RUN npm install --global "playwright@${PLAYWRIGHT_VERSION}" \
+    && npx playwright install --with-deps chromium \
+    && node -e 'require(process.env.PLAYWRIGHT_MODULE).chromium.executablePath()'
diff --git a/ci/images/README.md b/ci/images/README.md
new file mode 100644
index 0000000..b8e48c9
--- /dev/null
+++ b/ci/images/README.md
@@ -0,0 +1,21 @@
+# Shared PHP/Node CI containers on DKR-01
+
+Use five versioned images in GHCR:
+
+- `ghcr.io/codecorntech/ci-php:8.1-node22-v1`
+- `ghcr.io/codecorntech/ci-php:8.2-node22-v1`
+- `ghcr.io/codecorntech/ci-php:8.3-node22-v1`
+- `ghcr.io/codecorntech/ci-php:8.4-node22-v1`
+- `ghcr.io/codecorntech/ci-php:8.1-node22-playwright1.62.1-v1`
+
+These are proposed tags **not yet published**. Images use Ubuntu 24.04 and the same updated Ondrej PHP APT packages as DKR-01 (including the PHP 8.1 compatibility branch), Node 22 from official Node images and Composer 2. This avoids building CI on a long-unpatched official PHP 8.1 image. Playwright installs Chromium once at image build time.
+
+On DKR-01 (the 32 GB VM) run `bash ci/images/build.sh --dry-run`, then `--build`, then `--check`. Publish only when the check passes, with an authorized `docker login ghcr.io` using a `write:packages` token and `--publish`.
+
+Private GHCR packages need explicit GitHub Actions access for *both* `CodeCornTech/barbagia-media-manager` and `fgirolami29/wp-life-helper`, or make the image public. Workflow `jobs.container` attempts to pull images; a locally built tag is not a published GHCR package. **Do not merge consumer workflows before image access is confirmed.**
+
+The build command requires >=6 GiB free on /var/lib/docker and does not remove volumes, images or caches. With only 32 GiB, inspect `docker system df` after builds. Jobs must be trusted: membership in the Docker group is root-equivalent and different Unix accounts sharing the same Docker daemon do **not** isolate runner credentials. Do not add untrusted fork PRs. Do not mount Docker socket into PHP job containers.
+
+## Manual publisher (no PAT stored on VM)
+
+After a successful local `--check`, the source PR has been approved and merged to the default branch, and the organization runner is online, manually dispatch `.github/workflows/publish-ci-php-images.yml`. It authenticates using the short-lived workflow `GITHUB_TOKEN` with `packages: write` and publishes the five versioned tags. Do not dispatch until there is sufficient disk free and no other heavy build running.
diff --git a/ci/images/build.sh b/ci/images/build.sh
new file mode 100644
index 0000000..2ef5626
--- /dev/null
+++ b/ci/images/build.sh
@@ -0,0 +1,59 @@
+#!/bin/bash
+# DKR-01: prepare four PHP/Node toolchains and one Playwright image.
+# --dry-run (default), --build, --check, --publish (explicit).
+set -Eeuo pipefail
+cd "$(dirname "${BASH_SOURCE[0]}")"
+mode="${1:---dry-run}"
+[[ "$#" -le 1 ]] || exit 2
+case "$mode" in --dry-run|--build|--check|--publish) ;; *) echo 'Usage: build.sh --dry-run|--build|--check|--publish' >&2; exit 2 ;; esac
+base='ghcr.io/codecorntech/ci-php'
+versions=(8.1 8.2 8.3 8.4)
+browser_tag="${base}:8.1-node22-playwright1.62.1-v1"
+if [[ "$mode" == --dry-run ]]; then
+    echo 'NO CHANGES: would build/verify four PHP images + one Playwright image'
+    for v in "${versions[@]}"; do echo "${base}:${v}-node22-v1"; done
+    echo "$browser_tag"
+    echo 'No Docker prune. Publish separate and explicit, requires GHCR login.'
+    df -h /var/lib/docker 2>/dev/null || df -h /
+    exit 0
+fi
+docker info >/dev/null || { echo 'ERROR: cannot access Docker daemon' >&2; exit 1; }
+if [[ "$mode" == --build ]]; then
+    free_kb="$(df -Pk /var/lib/docker | awk 'NR==2 {print $4}')"
+    [[ "$free_kb" =~ ^[0-9]+$ && "$free_kb" -ge 6291456 ]] || { echo 'ERROR: less than 6GiB disk free' >&2; exit 1; }
+    for v in "${versions[@]}"; do
+        tag="${base}:${v}-node22-v1"
+        docker buildx build --load --pull --progress=plain --target ci -f Dockerfile --build-arg "PHP_VERSION=$v" -t "$tag" .
+    done
+    docker buildx build --load --progress=plain --target playwright -f Dockerfile \
+        --build-arg 'PHP_VERSION=8.1' \
+        --build-arg 'PLAYWRIGHT_VERSION=1.62.1' -t "$browser_tag" .
+    echo 'Build finished; run --check before --publish.'
+elif [[ "$mode" == --check ]]; then
+    for v in "${versions[@]}"; do
+        tag="${base}:${v}-node22-v1"
+        docker image inspect "$tag" >/dev/null || { echo "MISSING: $tag"; exit 1; }
+        major="${v%%.*}"; minor="${v#*.}"
+        docker run --rm --pull=never --entrypoint sh "$tag" -ec \
+            "php -r 'exit(PHP_MAJOR_VERSION===$major && PHP_MINOR_VERSION===$minor ? 0 : 1);' && php -m | grep -iq zip && node --version | grep -q '^v22[.]' && composer --version"
+        echo "OK: $tag"
+    done
+    docker image inspect "$browser_tag" >/dev/null || { echo "MISSING: $browser_tag"; exit 1; }
+    docker run --rm --pull=never --entrypoint node "$browser_tag" -e \
+        'const p = require(process.env.PLAYWRIGHT_MODULE); const fs = require("node:fs"); if (!fs.existsSync(p.chromium.executablePath())) process.exit(1);'
+    echo "OK: $browser_tag"
+    docker system df
+    echo 'CHECK PASSED'
+else
+    echo 'Requires existing docker login ghcr.io (write:packages).'
+    read -r -p 'Type PUBLISH to upload all five images: ' confirm
+    [[ "$confirm" == PUBLISH ]] || { echo 'Aborted'; exit 1; }
+    for v in "${versions[@]}"; do
+        tag="${base}:${v}-node22-v1"
+        docker image inspect "$tag" >/dev/null
+        docker push "$tag"
+    done
+    docker image inspect "$browser_tag" >/dev/null
+    docker push "$browser_tag"
+    echo 'Verify GHCR visibility/access from BOTH GitHub owners before CI migration.'
+fi
diff --git a/ci/runners/patch-register-v2.py b/ci/runners/patch-register-v2.py
new file mode 100644
index 0000000..c31d3ae
--- /dev/null
+++ b/ci/runners/patch-register-v2.py
@@ -0,0 +1,25 @@
+#!/usr/bin/env python3
+"""Fix runner v2's incorrect GitHub SHA-256 release note parser, safely."""
+from pathlib import Path
+import subprocess
+import sys
+
+if len(sys.argv) != 2:
+    raise SystemExit("Usage: python3 patch-register-v2.py /path/to/cc-dkr01-register-runners-v2.sh")
+p = Path(sys.argv[1]).resolve()
+source = p.read_text()
+start_marker = 'read -r download_url expected_sha archive_name < <(python3 -c'
+end_marker = '[[ "$expected_sha" =~ ^[a-f0-9]{64}$ ]]'
+if start_marker not in source or end_marker not in source:
+    raise SystemExit("STOP: expected v2 checksum parser not found; no changes")
+start = source.index(start_marker)
+end = source.index(end_marker, start)
+replacement = '''resolved="$(python3 -c '\nimport json, re, sys\ntry:\n    meta = json.load(sys.stdin)\nexcept ValueError as exc:\n    raise SystemExit(f"Invalid GitHub release metadata: {exc}")\npattern = re.compile(r"actions-runner-linux-x64-[0-9]+(?:\\.[0-9]+)+\\.tar\\.gz")\nassets = [a for a in meta.get("assets", []) if pattern.fullmatch(a.get("name", ""))]\nif len(assets) != 1:\n    raise SystemExit("Expected exactly one GitHub runner Linux x64 archive")\na = assets[0]\nname = a["name"]\nurl = a.get("browser_download_url", "")\nif not url.startswith("https://github.com/actions/runner/releases/download/"):\n    raise SystemExit("Unexpected GitHub runner download URL")\ndig = re.fullmatch(r"sha256:([a-fA-F0-9]{64})", a.get("digest") or "")\nbody = meta.get("body") or ""\nnotes = re.search(re.escape(name)+r"[\\x60\\s:|–-]+(?:SHA-?256[\\s:=]+)?([a-fA-F0-9]{64})(?![a-fA-F0-9])", body, re.I)\nif dig and notes and dig.group(1).lower() != notes.group(1).lower():\n    raise SystemExit("Checksum disagreement between API digest and release notes")\nsha = dig or notes\nif sha is None:\n    raise SystemExit("No official SHA256 for Linux runner; refusing to proceed")\nprint(f"{url}\\t{sha.group(1).lower()}\\t{name}")\n' <<< "$metadata")" || fail 'Release information/checksum incomplete'\nIFS=$'\\t' read -r download_url expected_sha archive_name <<< "$resolved"\n'''
+updated = source[:start] + replacement + source[end:]
+backup = p.with_name(p.name + ".before-digest-fix")
+if backup.exists():
+    raise SystemExit("STOP: backup already exists; refusing to overwrite")
+subprocess.run(["bash", "-n"], input=updated, text=True, check=True)
+backup.write_text(source)
+p.write_text(updated)
+print(f"PATCHED: {p}\nBACKUP: {backup}\nVALIDATED: bash -n passed")