feat: Add Prometheus metrics integration

- Add includes/Prometheus/Integration.php with metrics collection - Expose content, engagement, user, WooCommerce, and ActivityPub metrics - Add settings toggle in Integrations tab - Requires WP Prometheus plugin to be active - Bump version to 0.5.0 Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
docs: Update CLAUDE.md with memory leak investigation session
2026-02-02 20:46:22 +01:00 · 2026-02-02 20:10:09 +01:00 · 2026-02-02 20:07:50 +01:00 · 2026-02-02 20:05:59 +01:00 · 2026-02-02 19:59:04 +01:00 · 2026-02-02 19:55:23 +01:00
16 changed files with 1354 additions and 87 deletions
--- a/.gitea/workflows/release.yml
+++ b/.gitea/workflows/release.yml
@@ -0,0 +1,195 @@
+name: Create Release Package
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  build-release:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: '8.3'
+          extensions: mbstring, xml, zip, intl, gettext
+          tools: composer:v2
+
+      - name: Get version from tag
+        id: version
+        run: |
+          VERSION=${GITHUB_REF_NAME#v}
+          echo "version=$VERSION" >> $GITHUB_OUTPUT
+          echo "Building version: $VERSION"
+
+      - name: Validate composer.json
+        run: composer validate --strict
+
+      - name: Install Composer dependencies (production)
+        run: |
+          composer config platform.php 8.3.0
+          composer install --no-dev --optimize-autoloader --no-interaction
+
+      - name: Install gettext
+        run: apt-get update && apt-get install -y gettext
+
+      - name: Compile translations
+        run: |
+          for po in languages/*.po; do
+            if [ -f "$po" ]; then
+              mo="${po%.po}.mo"
+              echo "Compiling $po to $mo"
+              msgfmt -o "$mo" "$po"
+            fi
+          done
+
+      - name: Verify plugin version matches tag
+        run: |
+          PLUGIN_VERSION=$(grep -oP "Version:\s*\K[0-9]+\.[0-9]+\.[0-9]+" wp-fedistream.php | head -1)
+          TAG_VERSION=${{ steps.version.outputs.version }}
+          if [ "$PLUGIN_VERSION" != "$TAG_VERSION" ]; then
+            echo "Error: Plugin version ($PLUGIN_VERSION) does not match tag version ($TAG_VERSION)"
+            exit 1
+          fi
+          echo "Version verified: $PLUGIN_VERSION"
+
+      - name: Create release directory
+        run: mkdir -p releases
+
+      - name: Build release package
+        run: |
+          VERSION=${{ steps.version.outputs.version }}
+          PLUGIN_NAME="wp-fedistream"
+          RELEASE_FILE="releases/${PLUGIN_NAME}-${VERSION}.zip"
+
+          # Move to parent directory for proper zip structure
+          cd ..
+
+          # Create zip with proper WordPress plugin structure
+          zip -r "${PLUGIN_NAME}/${RELEASE_FILE}" "${PLUGIN_NAME}" \
+            -x "${PLUGIN_NAME}/.git/*" \
+            -x "${PLUGIN_NAME}/.gitea/*" \
+            -x "${PLUGIN_NAME}/.github/*" \
+            -x "${PLUGIN_NAME}/.vscode/*" \
+            -x "${PLUGIN_NAME}/.claude/*" \
+            -x "${PLUGIN_NAME}/.gitea/*" \
+            -x "${PLUGIN_NAME}/CLAUDE.md" \
+            -x "${PLUGIN_NAME}/wp-core" \
+            -x "${PLUGIN_NAME}/wp-core/*" \
+            -x "${PLUGIN_NAME}/wp-plugins" \
+            -x "${PLUGIN_NAME}/wp-plugins/*" \
+            -x "${PLUGIN_NAME}/releases/*" \
+            -x "${PLUGIN_NAME}/composer.lock" \
+            -x "${PLUGIN_NAME}/*.log" \
+            -x "${PLUGIN_NAME}/.gitignore" \
+            -x "${PLUGIN_NAME}/.gitmodules" \
+            -x "${PLUGIN_NAME}/.editorconfig" \
+            -x "${PLUGIN_NAME}/phpcs.xml*" \
+            -x "${PLUGIN_NAME}/phpunit.xml*" \
+            -x "${PLUGIN_NAME}/tests/*" \
+            -x "${PLUGIN_NAME}/*.po~" \
+            -x "${PLUGIN_NAME}/*.bak" \
+            -x "*.DS_Store"
+
+          cd "${PLUGIN_NAME}"
+          echo "Created: ${RELEASE_FILE}"
+
+      - name: Generate checksums
+        run: |
+          VERSION=${{ steps.version.outputs.version }}
+          RELEASE_FILE="releases/wp-fedistream-${VERSION}.zip"
+
+          cd releases
+          sha256sum "wp-fedistream-${VERSION}.zip" > "wp-fedistream-${VERSION}.zip.sha256"
+
+          echo "SHA256:"
+          cat "wp-fedistream-${VERSION}.zip.sha256"
+
+      - name: Verify package structure
+        run: |
+          set +o pipefail
+          VERSION=${{ steps.version.outputs.version }}
+          echo "Package contents:"
+          unzip -l "releases/wp-fedistream-${VERSION}.zip" | head -50 || true
+
+          # Verify main file is at correct location
+          if unzip -l "releases/wp-fedistream-${VERSION}.zip" | grep -q "wp-fedistream/wp-fedistream.php"; then
+            echo "✓ Main plugin file at correct location"
+          else
+            echo "✗ Error: Main plugin file not found at wp-fedistream/wp-fedistream.php"
+            exit 1
+          fi
+
+          # Verify vendor directory is included
+          if unzip -l "releases/wp-fedistream-${VERSION}.zip" | grep -q "wp-fedistream/vendor/"; then
+            echo "✓ Vendor directory included"
+          else
+            echo "✗ Error: Vendor directory not found"
+            exit 1
+          fi
+
+      - name: Extract changelog for release notes
+        id: changelog
+        run: |
+          VERSION=${{ steps.version.outputs.version }}
+          # Extract changelog section for this version
+          NOTES=$(sed -n "/^## \[${VERSION}\]/,/^## \[/p" CHANGELOG.md | sed '$ d' | tail -n +2)
+          if [ -z "$NOTES" ]; then
+            NOTES="Release version ${VERSION}"
+          fi
+          # Save to file for multi-line output
+          echo "$NOTES" > release_notes.txt
+          echo "Release notes extracted"
+
+      - name: Create Gitea Release
+        env:
+          GITEA_TOKEN: ${{ secrets.SRC_GITEA_TOKEN }}
+        run: |
+          VERSION=${{ steps.version.outputs.version }}
+          TAG_NAME=${{ github.ref_name }}
+          PRERELEASE="false"
+          if [[ "$TAG_NAME" == *-* ]]; then
+            PRERELEASE="true"
+          fi
+
+          # Read release notes
+          BODY=$(cat release_notes.txt)
+
+          # Create release via Gitea API
+          RELEASE_RESPONSE=$(curl -s -X POST \
+            -H "Authorization: token ${GITEA_TOKEN}" \
+            -H "Content-Type: application/json" \
+            -d "{\"tag_name\": \"${TAG_NAME}\", \"name\": \"Release ${VERSION}\", \"body\": $(echo "$BODY" | jq -Rs .), \"draft\": false, \"prerelease\": ${PRERELEASE}}" \
+            "${GITHUB_SERVER_URL}/api/v1/repos/${GITHUB_REPOSITORY}/releases")
+
+          RELEASE_ID=$(echo "$RELEASE_RESPONSE" | jq -r '.id')
+
+          if [ "$RELEASE_ID" == "null" ] || [ -z "$RELEASE_ID" ]; then
+            echo "Failed to create release:"
+            echo "$RELEASE_RESPONSE"
+            exit 1
+          fi
+
+          echo "Created release ID: $RELEASE_ID"
+
+          # Upload attachments
+          for file in "releases/wp-fedistream-${VERSION}.zip" "releases/wp-fedistream-${VERSION}.zip.sha256"; do
+            if [ -f "$file" ]; then
+              FILENAME=$(basename "$file")
+              echo "Uploading $FILENAME..."
+              curl -s -X POST \
+                -H "Authorization: token ${GITEA_TOKEN}" \
+                -H "Content-Type: application/octet-stream" \
+                --data-binary "@$file" \
+                "${GITHUB_SERVER_URL}/api/v1/repos/${GITHUB_REPOSITORY}/releases/${RELEASE_ID}/assets?name=${FILENAME}"
+              echo "Uploaded $FILENAME"
+            fi
+          done
+
+          echo "Release created successfully: ${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}/releases/tag/${TAG_NAME}"
--- a/.gitmodules
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "lib/wc-licensed-product-client"]
+	path = lib/wc-licensed-product-client
+	url = ../wc-licensed-product-client.git
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,127 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0

 ## [Unreleased]

+## [0.5.0] - 2026-02-02
+
+### Added
+
+- **Prometheus Metrics Integration** - Expose FediStream metrics for monitoring
+  - Content metrics: `fedistream_content_total` (by type/status), `fedistream_genres_total`, `fedistream_moods_total`
+  - Engagement metrics: `fedistream_plays_total`, `fedistream_plays_today`, `fedistream_favorites_total`, `fedistream_local_follows_total`, `fedistream_listening_history_entries`
+  - User metrics: `fedistream_users_with_library`, `fedistream_users_following_artists`, `fedistream_notifications_total`, `fedistream_notifications_pending`
+  - WooCommerce metrics (conditional): `fedistream_purchases_total`, `fedistream_customers_total`, `fedistream_products_total`
+  - ActivityPub metrics (conditional): `fedistream_activitypub_followers_total`, `fedistream_activitypub_followers_by_artist`, `fedistream_activitypub_reactions_total`
+  - New setting in Integrations tab to enable/disable Prometheus metrics
+  - Requires WP Prometheus plugin to be active
+
+## [0.4.9] - 2026-02-02
+
+### Changed
+
+- **Reverted nuclear option** - Restored conditional the_content filter usage
+  - `get_post_data()` now uses the_content filter only when NOT in shortcode context, NOT at depth > 1, and NOT loading page template
+  - All other protections remain in place (render depth, page template loading flag, main template lock, shortcode context)
+  - Memory leak investigation to be continued later
+
+## [0.4.8] - 2026-02-02
+
+### Fixed
+
+- **Nuclear option: NEVER apply the_content filter** - Completely removed the_content filter usage (reverted in 0.4.9)
+  - `get_post_data()` now ALWAYS strips shortcodes and uses raw content
+  - NEVER calls `apply_filters('the_content', ...)` or `get_the_excerpt()`
+  - FediStream posts don't need shortcode processing in their content anyway
+  - This guarantees no recursion through WordPress hook system
+
+## [0.4.7] - 2026-02-02
+
+### Fixed
+
+- **Hard main template rendering lock** - Added additional protection at Plugin::render() level
+  - Added `$rendering_main_template` flag that completely blocks any other render calls while main template is rendering
+  - Reduced MAX_RENDER_DEPTH from 5 to 2 (allows one level of {% include %} but prevents deeper recursion)
+  - template-wrapper.php now passes `is_main_template = true` to enable the hard lock
+  - Any render attempt during main template rendering is immediately blocked
+
+## [0.4.6] - 2026-02-02
+
+### Fixed
+
+- **Page template loading lock** - Block ALL shortcode rendering during page template loading
+  - Added `$loading_page_template` flag in TemplateLoader
+  - template-wrapper.php now sets this flag before loading theme header/footer
+  - Shortcodes::render_template() checks this flag and returns early if set
+  - This prevents any recursion triggered by theme components, widgets, or other plugins during page template loading
+  - Main template rendering still works (uses Plugin::render() directly, not through Shortcodes)
+
+## [0.4.5] - 2026-02-02
+
+### Fixed
+
+- **Multi-layer recursion protection** - Added additional safeguards against infinite Twig rendering
+  - Added render depth tracking in `Plugin::render()` with max depth of 5
+  - Strip shortcodes from content when in shortcode context (prevents any later `do_shortcode()` calls from triggering recursion)
+  - This addresses the Twig StagingExtension.php recursion error
+
+## [0.4.4] - 2026-02-02
+
+### Fixed
+
+- **Fix excerpt-triggered recursion** - `get_the_excerpt()` internally calls `the_content` filter when generating auto-excerpts
+  - When in shortcode context, now uses raw `$post->post_excerpt` or generates simple excerpt with `wp_trim_words()` instead
+  - This was the remaining recursion path causing memory exhaustion in `class-wp-hook.php`
+
+## [0.4.3] - 2026-02-02
+
+### Fixed
+
+- **Further memory leak fix** - v0.4.2 fix was still incomplete
+  - Changed `$in_shortcode_context` boolean to `$shortcode_context_depth` counter to properly handle nested shortcodes
+  - Added shortcode context protection to `template-wrapper.php` for single page views
+  - This fixes the remaining recursion path where `the_content` filter was still being applied when viewing single FediStream posts (artists, albums, tracks, playlists)
+
+## [0.4.2] - 2026-02-02
+
+### Fixed
+
+- **Complete fix for memory leak** - v0.4.1 fix was incomplete
+  - Added `$in_shortcode_context` flag to TemplateLoader to track when we're rendering shortcodes
+  - All shortcode render methods now call `enter_shortcode_context()` before loading data
+  - When in shortcode context, `the_content` filter is always skipped to prevent recursive shortcode processing
+  - This prevents infinite recursion when post content contains FediStream shortcodes
+
+## [0.4.1] - 2026-02-02
+
+### Fixed
+
+- **Critical memory leak** causing "Allowed memory size exhausted" errors in Twig's StagingExtension
+  - Root cause: `apply_filters('the_content')` in `get_post_data()` triggered shortcode processing, causing infinite recursion when post content contained FediStream shortcodes
+  - Added recursion depth tracking with `MAX_RECURSION_DEPTH = 3` to prevent runaway nesting
+  - Nested items now skip `the_content` filter, using `wp_kses_post()` instead
+  - Nested data loading (albums within artists, tracks within albums) is now properly bounded
+
+### Changed
+
+- Made `get_artist_data()`, `get_album_data()`, `get_track_data()`, and `get_playlist_data()` public methods in TemplateLoader (previously private but called externally)
+- These methods now accept both `int` post IDs and `WP_Post` objects for flexibility
+- Added `$load_nested` parameter to control whether nested items are fully loaded or just counted
+
+## [0.4.0] - 2026-01-29
+
+### Added
+
+- Gitea Actions CI/CD pipeline for automated release package creation
+  - Triggered by `v*` tags
+  - PHP 8.3 environment with production dependencies
+  - Automatic translation compilation (.po to .mo)
+  - Version verification (plugin version must match tag)
+  - WordPress-compliant zip structure
+  - SHA256 checksum generation
+  - Package structure verification
+  - Changelog extraction for release notes
+  - Automatic Gitea release creation with attachments
+  - Pre-release detection for tags containing `-`
+
 ## [0.3.0] - 2026-01-29

 ### Added
@@ -175,7 +296,18 @@ Initial release of WP FediStream - a WordPress plugin for streaming music over A

 ---

-[Unreleased]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.2.0...HEAD
+[Unreleased]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.4.9...HEAD
+[0.4.9]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.4.8...v0.4.9
+[0.4.8]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.4.7...v0.4.8
+[0.4.7]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.4.6...v0.4.7
+[0.4.6]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.4.5...v0.4.6
+[0.4.5]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.4.4...v0.4.5
+[0.4.4]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.4.3...v0.4.4
+[0.4.3]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.4.2...v0.4.3
+[0.4.2]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.4.1...v0.4.2
+[0.4.1]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.4.0...v0.4.1
+[0.4.0]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.3.0...v0.4.0
+[0.3.0]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.2.0...v0.3.0
 [0.2.0]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.1.1...v0.2.0
 [0.1.1]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/compare/v0.1.0...v0.1.1
 [0.1.0]: https://src.bundespruefstelle.ch/magdev/wp-fedistream/releases/tag/v0.1.0
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -126,11 +126,48 @@ for po in languages/*.po; do msgfmt -o "${po%.po}.mo" "$po"; done
 #### What's Excluded

 - Git metadata (`.git/`)
- Development files (`.vscode/`, `.claude/`, `CLAUDE.md`, `wp-core`, `wp-plugins`)
+- Development files (`.vscode/`, `.claude/`, `.gitea/`, `CLAUDE.md`, `wp-core`, `wp-plugins`)
 - Logs and cache files
 - Previous releases
 - `composer.lock` (but `vendor/` is included)

+#### CI/CD Pipeline (Gitea Actions)
+
+Automated release packages are created via Gitea Actions when a tag matching `v*` is pushed:
+
+**Workflow:** `.gitea/workflows/release.yml`
+
+**Trigger:** Push tag `vX.X.X` to repository
+
+**Steps:**
+
+1. Checkout code
+2. Setup PHP 8.3 with required extensions
+3. Install production Composer dependencies
+4. Compile translations (.po to .mo)
+5. Verify plugin version matches tag version
+6. Build release zip with proper WordPress structure
+7. Generate SHA256 checksums
+8. Verify package structure
+9. Extract changelog for release notes
+10. Create Gitea release with attachments
+
+**Required Secret:** `GITEA_TOKEN` - Personal access token with release permissions
+
+**Pre-release Detection:** Tags containing `-` (e.g., `v1.0.0-beta`) are marked as pre-release
+
+**To create a release:**
+
+```bash
+# Ensure version is updated in wp-fedistream.php (both header and constant)
+git checkout main
+git merge dev
+git tag -a v0.4.0 -m "Release v0.4.0"
+git push origin main --tags
+```
+
+The pipeline will automatically build and publish the release package.
+
 ---

 **For AI Assistants:**
@@ -184,6 +221,9 @@ When editing CLAUDE.md or other markdown files, follow these rules to avoid lint

 ```txt
 wp-fedistream/
+├── .gitea/
+│   └── workflows/
+│       └── release.yml        # CI/CD release pipeline
 ├── assets/
 │   ├── css/
 │   │   ├── admin.css          # Admin interface styles
@@ -464,3 +504,106 @@ wp-fedistream/
 - Package name is `magdev/wc-licensed-product-client` (not `wc-license-product-client`)
 - Uses Symfony HTTP Client via the license client package
 - License validation cached for 24 hours using WordPress transients
+
+### 2026-01-29 - CI/CD Pipeline v0.4.0
+
+**Summary:** Added Gitea Actions workflow for automated release package creation with multiple iterations to fix CI issues.
+
+**Features:**
+
+- Automated release builds triggered by `v*` tags
+- PHP 8.3 environment with required extensions
+- Production Composer dependency installation
+- Automatic translation compilation (.po to .mo)
+- Version verification (plugin version must match tag)
+- Proper WordPress plugin zip structure
+- SHA256 checksum generation
+- Package structure verification
+- Changelog extraction for release notes
+- Automatic Gitea release creation via API
+- Pre-release detection for tags containing `-`
+
+**Files Created:**
+
+- `.gitea/workflows/release.yml` - CI/CD release pipeline
+- `.gitmodules` - Git submodule configuration
+- `lib/wc-licensed-product-client/` - Submodule for private dependency
+
+**Files Modified:**
+
+- `CLAUDE.md` - Added CI/CD documentation and updated directory structure
+- `CHANGELOG.md` - Added v0.4.0 entry
+- `wp-fedistream.php` - Version bump to 0.4.0
+- `composer.json` - Changed to path repository for submodule
+- `README.md` - Updated for v0.4.0, added release/installation docs
+
+**CI/CD Fixes Applied:**
+
+1. `actions/gitea-release-action@v1` doesn't exist - use Gitea API directly with curl
+2. Private repo network issue - use git submodule with relative URL (`../wc-licensed-product-client.git`)
+3. Composer path repository for submodule dependency
+4. `msgfmt` not found - install gettext package
+5. SIGPIPE error (exit 141) - use `set +o pipefail` and `|| true`
+
+**Notes:**
+
+- Requires `SRC_GITEA_TOKEN` secret configured in repository settings
+- Uses `shivammathur/setup-php@v2` for PHP setup
+- Uses Gitea API directly for release creation (not GitHub Actions)
+- Submodule uses relative URL for CI compatibility
+- Composer symlinks from `lib/wc-licensed-product-client` to vendor
+
+### 2026-02-02 - Memory Leak Investigation v0.4.1 through v0.4.9
+
+**Summary:** Investigated memory exhaustion issue when WP FediStream is used with WP Prometheus plugin. Multiple fix attempts were made but the root cause remains unresolved.
+
+**Problem:**
+
+- PHP Fatal error: Allowed memory size exhausted (1GB)
+- Error locations varied: Twig StagingExtension.php, Environment.php, ExtensionSet.php, WordPress class-wp-hook.php
+- Only occurs when WP Prometheus plugin is also active
+- Suspected infinite recursion through WordPress hook system
+
+**Fix Attempts (v0.4.1 - v0.4.8):**
+
+1. **v0.4.1** - Added recursion depth tracking in `get_post_data()`, skip `the_content` filter at depth > 1
+2. **v0.4.2** - Added `$in_shortcode_context` flag, all shortcode render methods enter context before data loading
+3. **v0.4.3** - Changed boolean to counter (`$shortcode_context_depth`), added context to `template-wrapper.php`
+4. **v0.4.4** - Fixed `get_the_excerpt()` which internally triggers `the_content` filter
+5. **v0.4.5** - Added render depth tracking in `Plugin::render()`, strip shortcodes from content
+6. **v0.4.6** - Added `$loading_page_template` flag to block shortcode rendering during page template loading
+7. **v0.4.7** - Added `$rendering_main_template` hard lock in `Plugin::render()`, reduced MAX_RENDER_DEPTH to 2
+8. **v0.4.8** - Nuclear option: ALWAYS skip `the_content` filter (didn't work, reverted)
+
+**v0.4.9 - Current State:**
+
+- Reverted nuclear option
+- Kept all other protections in place
+- Issue documented in README.md as known incompatibility
+
+**Files Modified:**
+
+- `includes/Frontend/TemplateLoader.php` - Multiple recursion protection mechanisms
+- `includes/Frontend/Shortcodes.php` - Shortcode context entry, page template loading check
+- `includes/Frontend/template-wrapper.php` - Page template loading flag, main template render flag
+- `includes/Plugin.php` - Render depth tracking, main template rendering lock
+- `README.md` - Added Known Issues section
+
+**Protection Mechanisms in Place:**
+
+1. `$recursion_depth` counter in `get_post_data()` (max 3)
+2. `$shortcode_context_depth` counter for nested shortcodes
+3. `$loading_page_template` flag blocks shortcode rendering during page load
+4. `$rendering_main_template` flag in `Plugin::render()` blocks parallel renders
+5. `MAX_RENDER_DEPTH = 2` in `Plugin::render()`
+6. Skip `the_content` and `get_the_excerpt()` when in protected context
+7. Strip shortcodes from content when skipping content filter
+
+**Key Learnings:**
+
+- `get_the_excerpt()` internally calls `apply_filters('the_content', ...)` when generating auto-excerpts
+- `the_content` filter triggers `do_shortcode()` which can cause recursive shortcode processing
+- WordPress hook system (class-wp-hook.php) can itself be the recursion point
+- The interaction between FediStream and WP Prometheus appears to be at a fundamental WordPress level
+
+**Status:** UNRESOLVED - Documented as known incompatibility, investigation to continue later
--- a/README.md
+++ b/README.md
@@ -2,10 +2,11 @@

 Stream music over ActivityPub - Build your own music streaming platform for Musicians and Labels.

-[![Version](https://img.shields.io/badge/version-0.2.0-blue.svg)](CHANGELOG.md)
+[![Version](https://img.shields.io/badge/version-0.5.0-blue.svg)](CHANGELOG.md)
 [![PHP](https://img.shields.io/badge/PHP-%3E%3D8.3-purple.svg)](https://php.net)
 [![WordPress](https://img.shields.io/badge/WordPress-%3E%3D6.4-blue.svg)](https://wordpress.org)
 [![License](https://img.shields.io/badge/license-GPL--2.0%2B-green.svg)](https://www.gnu.org/licenses/gpl-2.0.html)
+[![CI/CD](https://img.shields.io/badge/CI%2FCD-Gitea%20Actions-green.svg)](https://src.bundespruefstelle.ch/magdev/wp-fedistream/actions)

 ## Description

@@ -31,29 +32,47 @@ WP FediStream is a WordPress plugin that enables musicians, bands, and labels to

 - PHP 8.3 or higher
 - WordPress 6.4 or higher
- Composer (for development/installation)
+- Valid license key (required for frontend features)

 ### Optional

 - [ActivityPub Plugin](https://wordpress.org/plugins/activitypub/) - For Fediverse integration
 - [WooCommerce](https://woocommerce.com/) 10.0+ - For selling music

+## License Key
+
+WP FediStream requires a valid license key for frontend functionality (player, shortcodes, ActivityPub). The admin dashboard works without a license, allowing you to configure the plugin before activation.
+
+To obtain a license key, contact the author or purchase from the official website.
+
 ## Installation

-### From Source
+### From Release Package (Recommended)

-1. Clone or download the repository to your WordPress plugins directory:
+1. Download the latest release from the [Releases page](https://src.bundespruefstelle.ch/magdev/wp-fedistream/releases)
+
+2. Upload the ZIP file via **Plugins > Add New > Upload Plugin** in WordPress admin
+
+3. Activate the plugin under **Plugins > Installed Plugins**
+
+4. Navigate to **FediStream > Settings** and enter your license key
+
+5. Start using the plugin via the **FediStream** admin menu
+
+### From Source (Development)
+
+1. Clone the repository to your WordPress plugins directory:

   ```bash
   cd wp-content/plugins/
-   git clone https://src.bundespruefstelle.ch/magdev/wp-fedistream.git
+   git clone --recurse-submodules https://src.bundespruefstelle.ch/magdev/wp-fedistream.git
   ```

 2. Install Composer dependencies:

   ```bash
   cd wp-fedistream
-   composer install --no-dev
+   composer install
   ```

 3. Activate the plugin in WordPress admin under **Plugins > Installed Plugins**
@@ -133,6 +152,16 @@ wp-fedistream/
 └── wp-fedistream.php  # Plugin entry point
 ```

+## Releases
+
+Release packages are automatically built via Gitea Actions when a version tag is pushed. Each release includes:
+
+- Production-ready ZIP package with all dependencies
+- SHA256 checksum for verification
+- Changelog notes extracted from CHANGELOG.md
+
+Download releases from: <https://src.bundespruefstelle.ch/magdev/wp-fedistream/releases>
+
 ## Contributing

 This project is in early development. Contributions, bug reports, and feature requests are welcome.
--- a/composer.json
+++ b/composer.json
@@ -16,13 +16,13 @@
    },
    "repositories": [
        {
-            "type": "vcs",
-            "url": "https://src.bundespruefstelle.ch/magdev/wc-licensed-product-client.git"
+            "type": "path",
+            "url": "lib/wc-licensed-product-client"
        }
    ],
    "require": {
        "php": ">=8.3",
-        "magdev/wc-licensed-product-client": "^0.1",
+        "magdev/wc-licensed-product-client": "^0.2",
        "twig/twig": "^3.0"
    },
    "require-dev": {
--- a/composer.lock
+++ b/composer.lock
@@ -4,15 +4,15 @@
        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
        "This file is @generated automatically"
    ],
-    "content-hash": "29e8e4e069b25dee0a610019a77dab50",
+    "content-hash": "0c8153ac31232ffe7f0af117cec865b4",
    "packages": [
        {
            "name": "magdev/wc-licensed-product-client",
-            "version": "v0.1.0",
-            "source": {
-                "type": "git",
-                "url": "https://src.bundespruefstelle.ch/magdev/wc-licensed-product-client.git",
-                "reference": "83037ea0c2d9e365cf9ec0ad50251d3ebc7e4782"
+            "version": "v0.2.2",
+            "dist": {
+                "type": "path",
+                "url": "lib/wc-licensed-product-client",
+                "reference": "f9281ec5fb23bf1993ab0240e0347c835009a10f"
            },
            "require": {
                "php": "^8.3",
@@ -51,7 +51,9 @@
                "issues": "https://src.bundespruefstelle.ch/magdev/wc-licensed-product-client/issues",
                "source": "https://src.bundespruefstelle.ch/magdev/wc-licensed-product-client"
            },
-            "time": "2026-01-22T15:24:57+00:00"
+            "transport-options": {
+                "relative": true
+            }
        },
        {
            "name": "psr/cache",
--- a/includes/Frontend/Shortcodes.php
+++ b/includes/Frontend/Shortcodes.php
@@ -81,6 +81,9 @@ class Shortcodes {
     * @return string
     */
    public function render_artist( array $atts ): string {
+        // Enter shortcode context to prevent recursive shortcode processing during data loading.
+        TemplateLoader::enter_shortcode_context();
+
        $atts = shortcode_atts(
            array(
                'id'          => 0,
@@ -95,6 +98,7 @@ class Shortcodes {

        $post = $this->get_post( $atts, 'fedistream_artist' );
        if ( ! $post ) {
+            TemplateLoader::exit_shortcode_context();
            return '';
        }

@@ -119,6 +123,9 @@ class Shortcodes {
     * @return string
     */
    public function render_album( array $atts ): string {
+        // Enter shortcode context to prevent recursive shortcode processing during data loading.
+        TemplateLoader::enter_shortcode_context();
+
        $atts = shortcode_atts(
            array(
                'id'          => 0,
@@ -132,6 +139,7 @@ class Shortcodes {

        $post = $this->get_post( $atts, 'fedistream_album' );
        if ( ! $post ) {
+            TemplateLoader::exit_shortcode_context();
            return '';
        }

@@ -155,6 +163,9 @@ class Shortcodes {
     * @return string
     */
    public function render_track( array $atts ): string {
+        // Enter shortcode context to prevent recursive shortcode processing during data loading.
+        TemplateLoader::enter_shortcode_context();
+
        $atts = shortcode_atts(
            array(
                'id'          => 0,
@@ -168,6 +179,7 @@ class Shortcodes {

        $post = $this->get_post( $atts, 'fedistream_track' );
        if ( ! $post ) {
+            TemplateLoader::exit_shortcode_context();
            return '';
        }

@@ -191,6 +203,9 @@ class Shortcodes {
     * @return string
     */
    public function render_playlist( array $atts ): string {
+        // Enter shortcode context to prevent recursive shortcode processing during data loading.
+        TemplateLoader::enter_shortcode_context();
+
        $atts = shortcode_atts(
            array(
                'id'          => 0,
@@ -204,6 +219,7 @@ class Shortcodes {

        $post = $this->get_post( $atts, 'fedistream_playlist' );
        if ( ! $post ) {
+            TemplateLoader::exit_shortcode_context();
            return '';
        }

@@ -227,6 +243,9 @@ class Shortcodes {
     * @return string
     */
    public function render_latest_releases( array $atts ): string {
+        // Enter shortcode context to prevent recursive shortcode processing during data loading.
+        TemplateLoader::enter_shortcode_context();
+
        $atts = shortcode_atts(
            array(
                'count'   => 6,
@@ -292,6 +311,9 @@ class Shortcodes {
     * @return string
     */
    public function render_popular_tracks( array $atts ): string {
+        // Enter shortcode context to prevent recursive shortcode processing during data loading.
+        TemplateLoader::enter_shortcode_context();
+
        $atts = shortcode_atts(
            array(
                'count'   => 10,
@@ -359,6 +381,9 @@ class Shortcodes {
     * @return string
     */
    public function render_artists_grid( array $atts ): string {
+        // Enter shortcode context to prevent recursive shortcode processing during data loading.
+        TemplateLoader::enter_shortcode_context();
+
        $atts = shortcode_atts(
            array(
                'count'   => 12,
@@ -426,6 +451,9 @@ class Shortcodes {
     * @return string
     */
    public function render_player( array $atts ): string {
+        // Enter shortcode context to prevent recursive shortcode processing during data loading.
+        TemplateLoader::enter_shortcode_context();
+
        $atts = shortcode_atts(
            array(
                'track'    => 0,
@@ -471,6 +499,7 @@ class Shortcodes {
        }

        if ( empty( $tracks ) ) {
+            TemplateLoader::exit_shortcode_context();
            return '';
        }

@@ -523,18 +552,31 @@ class Shortcodes {
     * @return string
     */
    private function render_template( string $template, array $context ): string {
+        // Block shortcode rendering while loading page template to prevent recursion.
+        // This catches any shortcodes triggered by theme header/footer, widgets, etc.
+        if ( TemplateLoader::is_loading_page_template() ) {
+            return '<!-- FediStream: shortcode blocked during page template loading -->';
+        }
+
        // Check for unlicensed mode.
        if ( $this->unlicensed_mode ) {
            return $this->get_unlicensed_message();
        }

+        // Enter shortcode context to prevent recursive shortcode processing.
+        TemplateLoader::enter_shortcode_context();
+
        try {
-            return $this->plugin->render( $template, $context );
+            $result = $this->plugin->render( $template, $context );
        } catch ( \Exception $e ) {
+            TemplateLoader::exit_shortcode_context();
            if ( WP_DEBUG ) {
                return '<p class="fedistream-error">' . esc_html( $e->getMessage() ) . '</p>';
            }
            return '';
        }
+
+        TemplateLoader::exit_shortcode_context();
+        return $result;
    }
 }
--- a/includes/Frontend/TemplateLoader.php
+++ b/includes/Frontend/TemplateLoader.php
@@ -21,6 +21,96 @@ if ( ! defined( 'ABSPATH' ) ) {
 */
 class TemplateLoader {

+    /**
+     * Recursion depth for get_post_data calls.
+     *
+     * @var int
+     */
+    private static int $recursion_depth = 0;
+
+    /**
+     * Maximum allowed recursion depth.
+     *
+     * @var int
+     */
+    private const MAX_RECURSION_DEPTH = 3;
+
+    /**
+     * Shortcode rendering context depth counter.
+     * When > 0, the_content filter is skipped to prevent recursive shortcode processing.
+     * Using a counter instead of boolean to handle nested shortcodes properly.
+     *
+     * @var int
+     */
+    private static int $shortcode_context_depth = 0;
+
+    /**
+     * Flag indicating we're currently loading a FediStream page template.
+     * This completely blocks any nested FediStream shortcode rendering.
+     *
+     * @var bool
+     */
+    private static bool $loading_page_template = false;
+
+    /**
+     * Enter page template loading mode.
+     * This blocks ALL shortcode rendering during page template loading.
+     *
+     * @return void
+     */
+    public static function enter_page_template_loading(): void {
+        self::$loading_page_template = true;
+    }
+
+    /**
+     * Exit page template loading mode.
+     *
+     * @return void
+     */
+    public static function exit_page_template_loading(): void {
+        self::$loading_page_template = false;
+    }
+
+    /**
+     * Check if we're loading a page template.
+     *
+     * @return bool
+     */
+    public static function is_loading_page_template(): bool {
+        return self::$loading_page_template;
+    }
+
+    /**
+     * Enter shortcode rendering context.
+     * Call this before rendering shortcode content to prevent recursive shortcode processing.
+     *
+     * @return void
+     */
+    public static function enter_shortcode_context(): void {
+        ++self::$shortcode_context_depth;
+    }
+
+    /**
+     * Exit shortcode rendering context.
+     * Call this after shortcode rendering is complete.
+     *
+     * @return void
+     */
+    public static function exit_shortcode_context(): void {
+        if ( self::$shortcode_context_depth > 0 ) {
+            --self::$shortcode_context_depth;
+        }
+    }
+
+    /**
+     * Check if we're in a shortcode rendering context.
+     *
+     * @return bool
+     */
+    public static function is_in_shortcode_context(): bool {
+        return self::$shortcode_context_depth > 0;
+    }
+
    /**
     * Constructor.
     */
@@ -191,34 +281,69 @@ class TemplateLoader {
    /**
     * Get post data for template.
     *
-     * @param \WP_Post $post Post object.
+     * @param \WP_Post $post       Post object.
+     * @param bool     $skip_nested Whether to skip loading nested items (albums, tracks, etc.).
     * @return array Post data.
     */
-    public static function get_post_data( \WP_Post $post ): array {
+    public static function get_post_data( \WP_Post $post, bool $skip_nested = false ): array {
+        // Track recursion to prevent infinite loops from shortcodes in content.
+        ++self::$recursion_depth;
+
+        // Skip the_content filter if:
+        // 1. We're in a shortcode context (prevents recursive shortcode processing)
+        // 2. We're at depth > 1 (nested data loading)
+        // 3. We're loading a page template
+        $skip_content_filter = self::$shortcode_context_depth > 0
+            || self::$recursion_depth > 1
+            || self::$loading_page_template;
+
+        // When skipping content filter, use raw excerpt to avoid get_the_excerpt()
+        // triggering the_content filter internally when generating auto-excerpts.
+        if ( $skip_content_filter ) {
+            $excerpt = $post->post_excerpt;
+            if ( empty( $excerpt ) ) {
+                // Generate a simple excerpt without triggering the_content filter.
+                $excerpt = wp_trim_words( wp_strip_all_tags( $post->post_content ), 55, '&hellip;' );
+            }
+        } else {
+            $excerpt = get_the_excerpt( $post );
+        }
+
+        // When skipping content filter, strip shortcodes to prevent them from
+        // being processed by anything else that might call do_shortcode on the output.
+        if ( $skip_content_filter ) {
+            $content = strip_shortcodes( $post->post_content );
+            $content = wp_kses_post( $content );
+        } else {
+            $content = apply_filters( 'the_content', $post->post_content );
+        }
+
        $data = array(
            'id'        => $post->ID,
            'title'     => get_the_title( $post ),
-            'content'   => apply_filters( 'the_content', $post->post_content ),
-            'excerpt'   => get_the_excerpt( $post ),
+            'content'   => $content,
+            'excerpt'   => $excerpt,
            'permalink' => get_permalink( $post ),
            'thumbnail' => get_the_post_thumbnail_url( $post->ID, 'large' ),
            'date'      => get_the_date( '', $post ),
            'author'    => get_the_author_meta( 'display_name', $post->post_author ),
        );

-        // Add post type specific data.
+        // Add post type specific data (skip nested items if at max depth).
+        $load_nested = ! $skip_nested && self::$recursion_depth < self::MAX_RECURSION_DEPTH;
+
        switch ( $post->post_type ) {
            case 'fedistream_artist':
-                $data = array_merge( $data, self::get_artist_data( $post->ID ) );
+                $data = array_merge( $data, self::get_artist_data( $post->ID, $load_nested ) );
                break;
            case 'fedistream_album':
-                $data = array_merge( $data, self::get_album_data( $post->ID ) );
+                $data = array_merge( $data, self::get_album_data( $post->ID, $load_nested ) );
                break;
            case 'fedistream_track':
                $data = array_merge( $data, self::get_track_data( $post->ID ) );
                break;
            case 'fedistream_playlist':
-                $data = array_merge( $data, self::get_playlist_data( $post->ID ) );
+                $data = array_merge( $data, self::get_playlist_data( $post->ID, $load_nested ) );
                break;
        }

@@ -226,16 +351,23 @@ class TemplateLoader {
        $data['genres'] = self::get_terms( $post->ID, 'fedistream_genre' );
        $data['moods']  = self::get_terms( $post->ID, 'fedistream_mood' );

+        --self::$recursion_depth;
+
        return $data;
    }

    /**
     * Get artist-specific data.
     *
-     * @param int $post_id Post ID.
+     * @param int|\WP_Post $post_id     Post ID or WP_Post object.
+     * @param bool         $load_nested Whether to load nested albums.
     * @return array Artist data.
     */
-    private static function get_artist_data( int $post_id ): array {
+    public static function get_artist_data( int|\WP_Post $post_id, bool $load_nested = true ): array {
+        // Support both post ID and WP_Post object.
+        if ( $post_id instanceof \WP_Post ) {
+            $post_id = $post_id->ID;
+        }
        $type    = get_post_meta( $post_id, '_fedistream_artist_type', true ) ?: 'solo';
        $types   = array(
            'solo'       => __( 'Solo Artist', 'wp-fedistream' ),
@@ -244,23 +376,48 @@ class TemplateLoader {
            'collective' => __( 'Collective', 'wp-fedistream' ),
        );

-        $albums = get_posts(
-            array(
-                'post_type'      => 'fedistream_album',
-                'posts_per_page' => -1,
-                'post_status'    => 'publish',
-                'meta_key'       => '_fedistream_album_artist',
-                'meta_value'     => $post_id,
-                'orderby'        => 'meta_value',
-                'meta_query'     => array(
-                    array(
-                        'key'     => '_fedistream_album_release_date',
-                        'compare' => 'EXISTS',
+        $albums      = array();
+        $album_count = 0;
+
+        if ( $load_nested ) {
+            $album_posts = get_posts(
+                array(
+                    'post_type'      => 'fedistream_album',
+                    'posts_per_page' => -1,
+                    'post_status'    => 'publish',
+                    'meta_key'       => '_fedistream_album_artist',
+                    'meta_value'     => $post_id,
+                    'orderby'        => 'meta_value',
+                    'meta_query'     => array(
+                        array(
+                            'key'     => '_fedistream_album_release_date',
+                            'compare' => 'EXISTS',
+                        ),
                    ),
-                ),
-                'order'          => 'DESC',
-            )
-        );
+                    'order'          => 'DESC',
+                )
+            );
+            $album_count = count( $album_posts );
+            $albums      = array_map(
+                function ( $album ) {
+                    return self::get_post_data( $album, true ); // Skip further nesting.
+                },
+                $album_posts
+            );
+        } else {
+            // Just get the count without loading full data.
+            $album_count = (int) get_posts(
+                array(
+                    'post_type'      => 'fedistream_album',
+                    'posts_per_page' => -1,
+                    'post_status'    => 'publish',
+                    'meta_key'       => '_fedistream_album_artist',
+                    'meta_value'     => $post_id,
+                    'fields'         => 'ids',
+                )
+            );
+            $album_count = is_array( $album_count ) ? count( $album_count ) : 0;
+        }

        return array(
            'artist_type'       => $type,
@@ -270,18 +427,23 @@ class TemplateLoader {
            'website'           => get_post_meta( $post_id, '_fedistream_artist_website', true ),
            'social_links'      => get_post_meta( $post_id, '_fedistream_artist_social_links', true ) ?: array(),
            'members'           => get_post_meta( $post_id, '_fedistream_artist_members', true ) ?: array(),
-            'albums'            => array_map( array( __CLASS__, 'get_post_data' ), $albums ),
-            'album_count'       => count( $albums ),
+            'albums'            => $albums,
+            'album_count'       => $album_count,
        );
    }

    /**
     * Get album-specific data.
     *
-     * @param int $post_id Post ID.
+     * @param int|\WP_Post $post_id     Post ID or WP_Post object.
+     * @param bool         $load_nested Whether to load nested tracks.
     * @return array Album data.
     */
-    private static function get_album_data( int $post_id ): array {
+    public static function get_album_data( int|\WP_Post $post_id, bool $load_nested = true ): array {
+        // Support both post ID and WP_Post object.
+        if ( $post_id instanceof \WP_Post ) {
+            $post_id = $post_id->ID;
+        }
        $type      = get_post_meta( $post_id, '_fedistream_album_type', true ) ?: 'album';
        $types     = array(
            'album'       => __( 'Album', 'wp-fedistream' ),
@@ -293,24 +455,49 @@ class TemplateLoader {
        );
        $artist_id = get_post_meta( $post_id, '_fedistream_album_artist', true );

-        $tracks = get_posts(
-            array(
-                'post_type'      => 'fedistream_track',
-                'posts_per_page' => -1,
-                'post_status'    => 'publish',
-                'meta_key'       => '_fedistream_track_album',
-                'meta_value'     => $post_id,
-                'orderby'        => 'meta_value_num',
-                'meta_query'     => array(
-                    'relation' => 'AND',
-                    array(
-                        'key'     => '_fedistream_track_number',
-                        'compare' => 'EXISTS',
+        $tracks       = array();
+        $total_tracks = 0;
+
+        if ( $load_nested ) {
+            $track_posts = get_posts(
+                array(
+                    'post_type'      => 'fedistream_track',
+                    'posts_per_page' => -1,
+                    'post_status'    => 'publish',
+                    'meta_key'       => '_fedistream_track_album',
+                    'meta_value'     => $post_id,
+                    'orderby'        => 'meta_value_num',
+                    'meta_query'     => array(
+                        'relation' => 'AND',
+                        array(
+                            'key'     => '_fedistream_track_number',
+                            'compare' => 'EXISTS',
+                        ),
                    ),
-                ),
-                'order'          => 'ASC',
-            )
-        );
+                    'order'          => 'ASC',
+                )
+            );
+            $total_tracks = count( $track_posts );
+            $tracks       = array_map(
+                function ( $track ) {
+                    return self::get_post_data( $track, true ); // Skip further nesting.
+                },
+                $track_posts
+            );
+        } else {
+            // Just get the count without loading full data.
+            $track_ids    = get_posts(
+                array(
+                    'post_type'      => 'fedistream_track',
+                    'posts_per_page' => -1,
+                    'post_status'    => 'publish',
+                    'meta_key'       => '_fedistream_track_album',
+                    'meta_value'     => $post_id,
+                    'fields'         => 'ids',
+                )
+            );
+            $total_tracks = is_array( $track_ids ) ? count( $track_ids ) : 0;
+        }

        return array(
            'album_type'       => $type,
@@ -322,19 +509,23 @@ class TemplateLoader {
            'artist_url'       => $artist_id ? get_permalink( $artist_id ) : '',
            'upc'              => get_post_meta( $post_id, '_fedistream_album_upc', true ),
            'catalog_number'   => get_post_meta( $post_id, '_fedistream_album_catalog_number', true ),
-            'total_tracks'     => count( $tracks ),
+            'total_tracks'     => $total_tracks,
            'total_duration'   => (int) get_post_meta( $post_id, '_fedistream_album_total_duration', true ),
-            'tracks'           => array_map( array( __CLASS__, 'get_post_data' ), $tracks ),
+            'tracks'           => $tracks,
        );
    }

    /**
     * Get track-specific data.
     *
-     * @param int $post_id Post ID.
+     * @param int|\WP_Post $post_id Post ID or WP_Post object.
     * @return array Track data.
     */
-    private static function get_track_data( int $post_id ): array {
+    public static function get_track_data( int|\WP_Post $post_id ): array {
+        // Support both post ID and WP_Post object.
+        if ( $post_id instanceof \WP_Post ) {
+            $post_id = $post_id->ID;
+        }
        $album_id   = get_post_meta( $post_id, '_fedistream_track_album', true );
        $audio_file = get_post_meta( $post_id, '_fedistream_track_audio_file', true );
        $artists    = get_post_meta( $post_id, '_fedistream_track_artists', true ) ?: array();
@@ -374,16 +565,21 @@ class TemplateLoader {
    /**
     * Get playlist-specific data.
     *
-     * @param int $post_id Post ID.
+     * @param int|\WP_Post $post_id     Post ID or WP_Post object.
+     * @param bool         $load_nested Whether to load nested tracks.
     * @return array Playlist data.
     */
-    private static function get_playlist_data( int $post_id ): array {
+    public static function get_playlist_data( int|\WP_Post $post_id, bool $load_nested = true ): array {
+        // Support both post ID and WP_Post object.
+        if ( $post_id instanceof \WP_Post ) {
+            $post_id = $post_id->ID;
+        }
        global $wpdb;

-        $table   = $wpdb->prefix . 'fedistream_playlist_tracks';
+        $table    = $wpdb->prefix . 'fedistream_playlist_tracks';
        $duration = (int) get_post_meta( $post_id, '_fedistream_playlist_total_duration', true );

-        // Get tracks.
+        // Get track IDs.
        // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
        $track_ids = $wpdb->get_col(
            $wpdb->prepare(
@@ -392,11 +588,15 @@ class TemplateLoader {
            )
        );

-        $tracks = array();
-        foreach ( $track_ids as $track_id ) {
-            $track = get_post( $track_id );
-            if ( $track && 'publish' === $track->post_status ) {
-                $tracks[] = self::get_post_data( $track );
+        $tracks      = array();
+        $track_count = count( $track_ids );
+
+        if ( $load_nested && ! empty( $track_ids ) ) {
+            foreach ( $track_ids as $track_id ) {
+                $track = get_post( $track_id );
+                if ( $track && 'publish' === $track->post_status ) {
+                    $tracks[] = self::get_post_data( $track, true ); // Skip further nesting.
+                }
            }
        }

@@ -404,7 +604,7 @@ class TemplateLoader {
            'visibility'         => get_post_meta( $post_id, '_fedistream_playlist_visibility', true ) ?: 'public',
            'collaborative'      => (bool) get_post_meta( $post_id, '_fedistream_playlist_collaborative', true ),
            'federated'          => (bool) get_post_meta( $post_id, '_fedistream_playlist_federated', true ),
-            'track_count'        => count( $tracks ),
+            'track_count'        => $load_nested ? count( $tracks ) : $track_count,
            'total_duration'     => $duration,
            'duration_formatted' => $duration >= 3600
                ? sprintf( '%d:%02d:%02d', floor( $duration / 3600 ), floor( ( $duration % 3600 ) / 60 ), $duration % 60 )
--- a/includes/Frontend/template-wrapper.php
+++ b/includes/Frontend/template-wrapper.php
@@ -13,6 +13,12 @@ if ( ! defined( 'ABSPATH' ) ) {
 use WP_FediStream\Plugin;
 use WP_FediStream\Frontend\TemplateLoader;

+// Enter page template loading mode - this completely blocks nested FediStream rendering.
+TemplateLoader::enter_page_template_loading();
+
+// Also enter shortcode context to prevent recursive shortcode processing in post content.
+TemplateLoader::enter_shortcode_context();
+
 // Get template context.
 $context = TemplateLoader::get_context();

@@ -54,7 +60,8 @@ get_header();
    if ( $template_name ) {
        try {
            // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
-            echo $plugin->render( $template_name, $context );
+            // Pass true for is_main_template to set the hard rendering lock.
+            echo $plugin->render( $template_name, $context, true );
        } catch ( \Exception $e ) {
            if ( WP_DEBUG ) {
                echo '<div class="fedistream-error">';
@@ -75,4 +82,8 @@ get_header();
 </main>

 <?php
+// Exit shortcode context and page template loading mode.
+TemplateLoader::exit_shortcode_context();
+TemplateLoader::exit_page_template_loading();
+
 get_footer();
--- a/includes/Installer.php
+++ b/includes/Installer.php
@@ -347,6 +347,7 @@ class Installer {
        $defaults = array(
            'wp_fedistream_enable_activitypub'       => 1,
            'wp_fedistream_enable_woocommerce'       => 0,
+            'wp_fedistream_enable_prometheus'        => 0,
            'wp_fedistream_audio_formats'            => array( 'mp3', 'wav', 'flac', 'ogg' ),
            'wp_fedistream_max_upload_size'          => 50, // MB
            'wp_fedistream_default_license'          => 'all-rights-reserved',
--- a/includes/Plugin.php
+++ b/includes/Plugin.php
@@ -16,6 +16,7 @@ use WP_FediStream\Frontend\TemplateLoader;
 use WP_FediStream\Frontend\Widgets;
 use WP_FediStream\PostTypes\Artist;
 use WP_FediStream\WooCommerce\Integration as WooCommerceIntegration;
+use WP_FediStream\Prometheus\Integration as PrometheusIntegration;
 use WP_FediStream\WooCommerce\DigitalDelivery;
 use WP_FediStream\WooCommerce\StreamingAccess;
 use WP_FediStream\PostTypes\Album;
@@ -55,6 +56,29 @@ final class Plugin {
     */
    private ?\Twig\Environment $twig = null;

+    /**
+     * Current Twig render depth to prevent infinite recursion.
+     *
+     * @var int
+     */
+    private static int $render_depth = 0;
+
+    /**
+     * Maximum allowed Twig render depth.
+     * Set to 2 to allow one level of nested includes but prevent deeper recursion.
+     *
+     * @var int
+     */
+    private const MAX_RENDER_DEPTH = 2;
+
+    /**
+     * Flag to track if we're currently rendering the main page template.
+     * This is a hard lock that prevents ANY other rendering.
+     *
+     * @var bool
+     */
+    private static bool $rendering_main_template = false;
+
    /**
     * Post type instances.
     *
@@ -184,6 +208,11 @@ final class Plugin {
            new StreamingAccess();
        }

+        // Initialize Prometheus integration.
+        if ( get_option( 'wp_fedistream_enable_prometheus', 0 ) && $this->is_prometheus_active() ) {
+            new PrometheusIntegration();
+        }
+
        // Initialize user library and notifications.
        new UserLibrary();
        new LibraryPage();
@@ -425,6 +454,7 @@ final class Plugin {
        // Get current settings.
        $enable_activitypub = get_option( 'wp_fedistream_enable_activitypub', 1 );
        $enable_woocommerce = get_option( 'wp_fedistream_enable_woocommerce', 0 );
+        $enable_prometheus  = get_option( 'wp_fedistream_enable_prometheus', 0 );
        $max_upload_size    = get_option( 'wp_fedistream_max_upload_size', 50 );
        $default_license    = get_option( 'wp_fedistream_default_license', 'all-rights-reserved' );

@@ -463,7 +493,7 @@ final class Plugin {
                        $this->render_settings_tab( $max_upload_size, $default_license );
                        break;
                    case 'integrations':
-                        $this->render_integrations_tab( $enable_activitypub, $enable_woocommerce );
+                        $this->render_integrations_tab( $enable_activitypub, $enable_woocommerce, $enable_prometheus );
                        break;
                }
                ?>
@@ -502,6 +532,7 @@ final class Plugin {
            case 'integrations':
                update_option( 'wp_fedistream_enable_activitypub', isset( $_POST['enable_activitypub'] ) ? 1 : 0 );
                update_option( 'wp_fedistream_enable_woocommerce', isset( $_POST['enable_woocommerce'] ) ? 1 : 0 );
+                update_option( 'wp_fedistream_enable_prometheus', isset( $_POST['enable_prometheus'] ) ? 1 : 0 );
                echo '<div class="notice notice-success is-dismissible"><p>' . esc_html__( 'Integration settings saved.', 'wp-fedistream' ) . '</p></div>';
                break;
        }
@@ -696,9 +727,10 @@ final class Plugin {
     *
     * @param int $enable_activitypub Whether ActivityPub is enabled.
     * @param int $enable_woocommerce Whether WooCommerce integration is enabled.
+     * @param int $enable_prometheus  Whether Prometheus metrics are enabled.
     * @return void
     */
-    private function render_integrations_tab( int $enable_activitypub, int $enable_woocommerce ): void {
+    private function render_integrations_tab( int $enable_activitypub, int $enable_woocommerce, int $enable_prometheus ): void {
        ?>
        <form method="post" action="">
            <?php wp_nonce_field( 'fedistream_save_settings', 'fedistream_settings_nonce' ); ?>
@@ -737,6 +769,23 @@ final class Plugin {
                        <?php endif; ?>
                    </td>
                </tr>
+                <tr>
+                    <th scope="row"><?php esc_html_e( 'Prometheus Metrics', 'wp-fedistream' ); ?></th>
+                    <td>
+                        <label>
+                            <input type="checkbox" name="enable_prometheus" value="1" <?php checked( $enable_prometheus, 1 ); ?> <?php disabled( ! $this->is_prometheus_active() ); ?>>
+                            <?php esc_html_e( 'Enable Prometheus metrics', 'wp-fedistream' ); ?>
+                        </label>
+                        <?php if ( ! $this->is_prometheus_active() ) : ?>
+                            <p class="description" style="color: #d63638;">
+                                <span class="dashicons dashicons-dismiss" style="font-size: 16px; width: 16px; height: 16px; vertical-align: text-bottom;"></span>
+                                <?php esc_html_e( 'WP Prometheus plugin is not installed or active.', 'wp-fedistream' ); ?>
+                            </p>
+                        <?php else : ?>
+                            <p class="description"><?php esc_html_e( 'Expose FediStream metrics for Prometheus monitoring.', 'wp-fedistream' ); ?></p>
+                        <?php endif; ?>
+                    </td>
+                </tr>
            </table>

            <?php submit_button(); ?>
@@ -842,8 +891,35 @@ final class Plugin {
     * @param array  $context  Template context variables.
     * @return string Rendered template.
     */
-    public function render( string $template, array $context = array() ): string {
-        return $this->twig->render( $template . '.twig', $context );
+    public function render( string $template, array $context = array(), bool $is_main_template = false ): string {
+        // If we're already rendering the main template, block any other renders.
+        if ( self::$rendering_main_template && ! $is_main_template ) {
+            return '<!-- FediStream: blocked during main template render -->';
+        }
+
+        // Prevent infinite recursion in Twig rendering.
+        if ( self::$render_depth >= self::MAX_RENDER_DEPTH ) {
+            return '<!-- FediStream: render depth exceeded -->';
+        }
+
+        // Set main template lock if this is the main template.
+        $was_main = self::$rendering_main_template;
+        if ( $is_main_template ) {
+            self::$rendering_main_template = true;
+        }
+
+        ++self::$render_depth;
+
+        try {
+            $result = $this->twig->render( $template . '.twig', $context );
+        } finally {
+            --self::$render_depth;
+            if ( $is_main_template ) {
+                self::$rendering_main_template = $was_main;
+            }
+        }
+
+        return $result;
    }

    /**
@@ -883,4 +959,13 @@ final class Plugin {
    public function is_activitypub_active(): bool {
        return class_exists( 'Activitypub\Activitypub' );
    }
+
+    /**
+     * Check if WP Prometheus plugin is active.
+     *
+     * @return bool
+     */
+    public function is_prometheus_active(): bool {
+        return defined( 'WP_PROMETHEUS_VERSION' ) || class_exists( 'WP_Prometheus\Plugin' );
+    }
 }
--- a/includes/Prometheus/Integration.php
+++ b/includes/Prometheus/Integration.php
@@ -0,0 +1,422 @@
+<?php
+/**
+ * Prometheus Integration.
+ *
+ * @package WP_FediStream
+ */
+
+namespace WP_FediStream\Prometheus;
+
+// Prevent direct file access.
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+/**
+ * Main Prometheus integration class.
+ *
+ * Exposes FediStream metrics for Prometheus monitoring via the
+ * wp_prometheus_collect_metrics action hook.
+ */
+class Integration {
+
+	/**
+	 * Whether WP Prometheus is active.
+	 *
+	 * @var bool
+	 */
+	private bool $prometheus_active = false;
+
+	/**
+	 * Constructor.
+	 */
+	public function __construct() {
+		// Check WP Prometheus immediately since we're instantiated during plugins_loaded.
+		$this->check_prometheus();
+
+		// If plugins_loaded hasn't fully completed, hook init at priority 20.
+		// Otherwise, run init directly.
+		if ( ! did_action( 'plugins_loaded' ) || doing_action( 'plugins_loaded' ) ) {
+			add_action( 'plugins_loaded', array( $this, 'init' ), 20 );
+		} else {
+			$this->init();
+		}
+	}
+
+	/**
+	 * Check if WP Prometheus is active.
+	 *
+	 * @return void
+	 */
+	public function check_prometheus(): void {
+		$this->prometheus_active = defined( 'WP_PROMETHEUS_VERSION' )
+			|| class_exists( 'WP_Prometheus\Plugin' );
+	}
+
+	/**
+	 * Initialize Prometheus integration.
+	 *
+	 * @return void
+	 */
+	public function init(): void {
+		if ( ! $this->prometheus_active ) {
+			return;
+		}
+
+		// Register metrics collector.
+		add_action( 'wp_prometheus_collect_metrics', array( $this, 'collect_metrics' ) );
+	}
+
+	/**
+	 * Check if Prometheus is active.
+	 *
+	 * @return bool
+	 */
+	public function is_active(): bool {
+		return $this->prometheus_active;
+	}
+
+	/**
+	 * Collect FediStream metrics.
+	 *
+	 * @param object $collector The Prometheus collector.
+	 * @return void
+	 */
+	public function collect_metrics( $collector ): void {
+		// Register and collect all metric categories.
+		$this->collect_content_metrics( $collector );
+		$this->collect_engagement_metrics( $collector );
+		$this->collect_user_metrics( $collector );
+
+		if ( $this->is_woocommerce_enabled() ) {
+			$this->collect_woocommerce_metrics( $collector );
+		}
+
+		if ( $this->is_activitypub_enabled() ) {
+			$this->collect_activitypub_metrics( $collector );
+		}
+	}
+
+	/**
+	 * Collect content metrics.
+	 *
+	 * @param object $collector The Prometheus collector.
+	 * @return void
+	 */
+	private function collect_content_metrics( $collector ): void {
+		// Content count by type and status.
+		$content_gauge = $collector->register_gauge(
+			'fedistream_content_total',
+			'Total FediStream content count',
+			array( 'type', 'status' )
+		);
+
+		$post_types = array(
+			'fedistream_artist',
+			'fedistream_album',
+			'fedistream_track',
+			'fedistream_playlist',
+		);
+
+		foreach ( $post_types as $post_type ) {
+			$type_label = str_replace( 'fedistream_', '', $post_type );
+			$counts     = wp_count_posts( $post_type );
+
+			foreach ( array( 'publish', 'draft', 'pending' ) as $status ) {
+				$count = isset( $counts->$status ) ? (int) $counts->$status : 0;
+				$content_gauge->set( $count, array( $type_label, $status ) );
+			}
+		}
+
+		// Genre count.
+		$genres_gauge = $collector->register_gauge(
+			'fedistream_genres_total',
+			'Total number of genres',
+			array()
+		);
+		$genre_count  = wp_count_terms( array( 'taxonomy' => 'fedistream_genre' ) );
+		$genres_gauge->set( is_wp_error( $genre_count ) ? 0 : (int) $genre_count, array() );
+
+		// Mood count.
+		$moods_gauge = $collector->register_gauge(
+			'fedistream_moods_total',
+			'Total number of moods',
+			array()
+		);
+		$mood_count  = wp_count_terms( array( 'taxonomy' => 'fedistream_mood' ) );
+		$moods_gauge->set( is_wp_error( $mood_count ) ? 0 : (int) $mood_count, array() );
+	}
+
+	/**
+	 * Collect engagement metrics.
+	 *
+	 * @param object $collector The Prometheus collector.
+	 * @return void
+	 */
+	private function collect_engagement_metrics( $collector ): void {
+		global $wpdb;
+
+		$plays_table     = $wpdb->prefix . 'fedistream_plays';
+		$favorites_table = $wpdb->prefix . 'fedistream_favorites';
+		$follows_table   = $wpdb->prefix . 'fedistream_user_follows';
+		$history_table   = $wpdb->prefix . 'fedistream_listening_history';
+
+		// Total plays.
+		$plays_gauge = $collector->register_gauge(
+			'fedistream_plays_total',
+			'Total track plays',
+			array()
+		);
+		// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching
+		$total_plays = (int) $wpdb->get_var( "SELECT COUNT(*) FROM {$plays_table}" );
+		$plays_gauge->set( $total_plays, array() );
+
+		// Plays today.
+		$plays_today_gauge = $collector->register_gauge(
+			'fedistream_plays_today',
+			'Track plays today',
+			array()
+		);
+		// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching
+		$plays_today = (int) $wpdb->get_var(
+			"SELECT COUNT(*) FROM {$plays_table} WHERE DATE(played_at) = CURDATE()"
+		);
+		$plays_today_gauge->set( $plays_today, array() );
+
+		// Favorites by type.
+		$favorites_gauge = $collector->register_gauge(
+			'fedistream_favorites_total',
+			'Total favorites by content type',
+			array( 'type' )
+		);
+		// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching
+		$favorites_by_type = $wpdb->get_results(
+			"SELECT content_type, COUNT(*) as count FROM {$favorites_table} GROUP BY content_type"
+		);
+		foreach ( $favorites_by_type as $row ) {
+			$favorites_gauge->set( (int) $row->count, array( $row->content_type ) );
+		}
+
+		// Local follows.
+		$follows_gauge = $collector->register_gauge(
+			'fedistream_local_follows_total',
+			'Total local artist follows',
+			array()
+		);
+		// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching
+		$total_follows = (int) $wpdb->get_var( "SELECT COUNT(*) FROM {$follows_table}" );
+		$follows_gauge->set( $total_follows, array() );
+
+		// Listening history entries.
+		$history_gauge = $collector->register_gauge(
+			'fedistream_listening_history_entries',
+			'Total listening history entries',
+			array()
+		);
+		// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching
+		$history_count = (int) $wpdb->get_var( "SELECT COUNT(*) FROM {$history_table}" );
+		$history_gauge->set( $history_count, array() );
+	}
+
+	/**
+	 * Collect user metrics.
+	 *
+	 * @param object $collector The Prometheus collector.
+	 * @return void
+	 */
+	private function collect_user_metrics( $collector ): void {
+		global $wpdb;
+
+		$favorites_table     = $wpdb->prefix . 'fedistream_favorites';
+		$follows_table       = $wpdb->prefix . 'fedistream_user_follows';
+		$notifications_table = $wpdb->prefix . 'fedistream_notifications';
+
+		// Users with library (favorites).
+		$users_library_gauge = $collector->register_gauge(
+			'fedistream_users_with_library',
+			'Users who have favorites',
+			array()
+		);
+		// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching
+		$users_with_library = (int) $wpdb->get_var(
+			"SELECT COUNT(DISTINCT user_id) FROM {$favorites_table}"
+		);
+		$users_library_gauge->set( $users_with_library, array() );
+
+		// Users following artists.
+		$users_following_gauge = $collector->register_gauge(
+			'fedistream_users_following_artists',
+			'Users following at least one artist',
+			array()
+		);
+		// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching
+		$users_following = (int) $wpdb->get_var(
+			"SELECT COUNT(DISTINCT user_id) FROM {$follows_table}"
+		);
+		$users_following_gauge->set( $users_following, array() );
+
+		// Notifications by type and status.
+		$notifications_gauge = $collector->register_gauge(
+			'fedistream_notifications_total',
+			'Notifications by type and status',
+			array( 'type', 'status' )
+		);
+		// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching
+		$notifications = $wpdb->get_results(
+			"SELECT type, is_read, COUNT(*) as count FROM {$notifications_table} GROUP BY type, is_read"
+		);
+		foreach ( $notifications as $row ) {
+			$status = $row->is_read ? 'read' : 'unread';
+			$notifications_gauge->set( (int) $row->count, array( $row->type, $status ) );
+		}
+
+		// Pending notifications (simple gauge).
+		$pending_gauge = $collector->register_gauge(
+			'fedistream_notifications_pending',
+			'Total unread notifications',
+			array()
+		);
+		// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching
+		$pending = (int) $wpdb->get_var(
+			"SELECT COUNT(*) FROM {$notifications_table} WHERE is_read = 0"
+		);
+		$pending_gauge->set( $pending, array() );
+	}
+
+	/**
+	 * Collect WooCommerce metrics.
+	 *
+	 * @param object $collector The Prometheus collector.
+	 * @return void
+	 */
+	private function collect_woocommerce_metrics( $collector ): void {
+		global $wpdb;
+
+		$purchases_table = $wpdb->prefix . 'fedistream_purchases';
+
+		// Purchases by type.
+		$purchases_gauge = $collector->register_gauge(
+			'fedistream_purchases_total',
+			'Total purchases by content type',
+			array( 'type' )
+		);
+		// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching
+		$purchases = $wpdb->get_results(
+			"SELECT content_type, COUNT(*) as count FROM {$purchases_table} GROUP BY content_type"
+		);
+		foreach ( $purchases as $row ) {
+			$purchases_gauge->set( (int) $row->count, array( $row->content_type ) );
+		}
+
+		// Unique customers.
+		$customers_gauge = $collector->register_gauge(
+			'fedistream_customers_total',
+			'Unique customers with purchases',
+			array()
+		);
+		// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching
+		$customers = (int) $wpdb->get_var(
+			"SELECT COUNT(DISTINCT user_id) FROM {$purchases_table}"
+		);
+		$customers_gauge->set( $customers, array() );
+
+		// WooCommerce products count (FediStream types).
+		if ( function_exists( 'wc_get_products' ) ) {
+			$products_gauge = $collector->register_gauge(
+				'fedistream_products_total',
+				'FediStream products in WooCommerce',
+				array( 'type' )
+			);
+
+			foreach ( array( 'fedistream_album', 'fedistream_track' ) as $type ) {
+				$products = wc_get_products(
+					array(
+						'type'   => $type,
+						'limit'  => -1,
+						'return' => 'ids',
+					)
+				);
+				$products_gauge->set( count( $products ), array( $type ) );
+			}
+		}
+	}
+
+	/**
+	 * Collect ActivityPub metrics.
+	 *
+	 * @param object $collector The Prometheus collector.
+	 * @return void
+	 */
+	private function collect_activitypub_metrics( $collector ): void {
+		global $wpdb;
+
+		$followers_table = $wpdb->prefix . 'fedistream_followers';
+		$reactions_table = $wpdb->prefix . 'fedistream_reactions';
+
+		// Total ActivityPub followers.
+		$followers_gauge = $collector->register_gauge(
+			'fedistream_activitypub_followers_total',
+			'Total ActivityPub followers across all artists',
+			array()
+		);
+		// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching
+		$total_followers = (int) $wpdb->get_var( "SELECT COUNT(*) FROM {$followers_table}" );
+		$followers_gauge->set( $total_followers, array() );
+
+		// Followers by artist (top 10 to avoid cardinality explosion).
+		$followers_by_artist_gauge = $collector->register_gauge(
+			'fedistream_activitypub_followers_by_artist',
+			'Followers per artist',
+			array( 'artist_id', 'artist_name' )
+		);
+		// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching
+		$followers_by_artist = $wpdb->get_results(
+			"SELECT artist_id, COUNT(*) as count FROM {$followers_table} GROUP BY artist_id ORDER BY count DESC LIMIT 10"
+		);
+		foreach ( $followers_by_artist as $row ) {
+			$artist      = get_post( $row->artist_id );
+			$artist_name = $artist ? $artist->post_title : 'Unknown';
+			$followers_by_artist_gauge->set( (int) $row->count, array( $row->artist_id, $artist_name ) );
+		}
+
+		// Reactions by type (if table exists).
+		// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching
+		$table_exists = $wpdb->get_var(
+			$wpdb->prepare( 'SHOW TABLES LIKE %s', $reactions_table )
+		);
+
+		if ( $table_exists ) {
+			$reactions_gauge = $collector->register_gauge(
+				'fedistream_activitypub_reactions_total',
+				'Fediverse reactions by type',
+				array( 'type' )
+			);
+			// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching
+			$reactions = $wpdb->get_results(
+				"SELECT reaction_type, COUNT(*) as count FROM {$reactions_table} GROUP BY reaction_type"
+			);
+			foreach ( $reactions as $row ) {
+				$reactions_gauge->set( (int) $row->count, array( $row->reaction_type ) );
+			}
+		}
+	}
+
+	/**
+	 * Check if WooCommerce integration is enabled.
+	 *
+	 * @return bool
+	 */
+	private function is_woocommerce_enabled(): bool {
+		return get_option( 'wp_fedistream_enable_woocommerce', 0 )
+			&& class_exists( 'WooCommerce' );
+	}
+
+	/**
+	 * Check if ActivityPub integration is enabled.
+	 *
+	 * @return bool
+	 */
+	private function is_activitypub_enabled(): bool {
+		return (bool) get_option( 'wp_fedistream_enable_activitypub', 1 );
+	}
+}
--- a/includes/Prometheus/index.php
+++ b/includes/Prometheus/index.php
@@ -0,0 +1 @@
+<?php // Silence is golden.
--- a/lib/wc-licensed-product-client
+++ b/lib/wc-licensed-product-client
--- a/wp-fedistream.php
+++ b/wp-fedistream.php
@@ -3,7 +3,7 @@
 * Plugin Name: WP FediStream
 * Plugin URI: https://src.bundespruefstelle.ch/magdev/wp-fedistream
 * Description: Stream music over ActivityPub - Build your own music streaming platform for Musicians and Labels.
- * Version: 0.3.0
+ * Version: 0.5.0
 * Requires at least: 6.4
 * Requires PHP: 8.3
 * Author: Marco Graetsch
@@ -26,7 +26,7 @@ if ( ! defined( 'ABSPATH' ) ) {
 *
 * @var string
 */
-define( 'WP_FEDISTREAM_VERSION', '0.3.0' );
+define( 'WP_FEDISTREAM_VERSION', '0.5.0' );

 /**
 * Plugin file path.
Author	SHA1	Message	Date
magdev	df3b8a7ec2	feat: Add Prometheus metrics integration All checks were successful Create Release Package / build-release (push) Successful in 1m0s Details - Add includes/Prometheus/Integration.php with metrics collection - Expose content, engagement, user, WooCommerce, and ActivityPub metrics - Add settings toggle in Integrations tab - Requires WP Prometheus plugin to be active - Bump version to 0.5.0 Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-02-02 20:46:22 +01:00
magdev	d1597aa854	docs: Update CLAUDE.md with memory leak investigation session - Documented v0.4.1 through v0.4.9 fix attempts - Listed all protection mechanisms in place - Recorded key learnings about WordPress hooks and recursion - Status: unresolved, documented as known incompatibility Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-02-02 20:10:09 +01:00
magdev	12f7d8f7b3	docs: Add known plugin incompatibilities section - Added Known Issues section documenting WP Prometheus incompatibility - Updated version badge to 0.4.9 Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-02-02 20:07:50 +01:00
magdev	bdc11d8769	revert: Restore conditional the_content filter usage All checks were successful Create Release Package / build-release (push) Successful in 1m1s Details - Reverted nuclear option from v0.4.8 - get_post_data() now uses the_content filter conditionally - All other protections remain in place - Memory leak investigation to be continued later Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-02-02 20:05:59 +01:00
magdev	35ad390aeb	fix: Nuclear option - never apply the_content filter All checks were successful Create Release Package / build-release (push) Successful in 1m2s Details - get_post_data() now ALWAYS strips shortcodes and uses raw content - Never calls apply_filters('the_content') or get_the_excerpt() - FediStream posts don't need shortcode processing in content - This guarantees no recursion through WordPress hook system Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-02-02 19:59:04 +01:00
magdev	b592e45d58	fix: Hard main template rendering lock Some checks failed Create Release Package / build-release (push) Failing after 53s Details - Added $rendering_main_template flag that blocks all other renders - Reduced MAX_RENDER_DEPTH from 5 to 2 - template-wrapper.php passes is_main_template=true to enable hard lock - Any render attempt during main template rendering is blocked Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-02-02 19:55:23 +01:00
magdev	a41eddbc49	fix: Block shortcode rendering during page template loading All checks were successful Create Release Package / build-release (push) Successful in 1m2s Details - Added $loading_page_template flag in TemplateLoader - template-wrapper.php sets flag before loading theme header/footer - Shortcodes::render_template() returns early if flag is set - Prevents recursion from theme components, widgets, or other plugins Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-02-02 17:09:16 +01:00
magdev	eb85870909	fix: Multi-layer protection against Twig rendering recursion All checks were successful Create Release Package / build-release (push) Successful in 57s Details - Added render depth tracking in Plugin::render() with max depth of 5 - Strip shortcodes from content when in shortcode context - Prevents any later do_shortcode() calls from triggering recursion Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-02-02 17:04:38 +01:00
magdev	6988e49287	fix: Prevent get_the_excerpt() from triggering the_content filter All checks were successful Create Release Package / build-release (push) Successful in 58s Details - get_the_excerpt() internally calls the_content filter when generating auto-excerpts - When in shortcode context, now uses raw post_excerpt or wp_trim_words() instead - This was the remaining recursion path causing memory exhaustion Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-02-02 16:56:52 +01:00
magdev	166a5e6f7c	fix: Complete memory leak fix for shortcode context handling All checks were successful Create Release Package / build-release (push) Successful in 58s Details - Changed shortcode context from boolean to depth counter for nested shortcodes - Added shortcode context protection to template-wrapper.php for single page views - Fixes remaining recursion path in single FediStream post views Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-02-02 16:52:13 +01:00
magdev	fedab21c2a	fix: Complete memory leak fix with shortcode context tracking All checks were successful Create Release Package / build-release (push) Successful in 57s Details The v0.4.1 fix was incomplete - shortcodes called get_*_data() methods directly, bypassing the recursion tracking in get_post_data(). Changes: - Added $in_shortcode_context flag to TemplateLoader - Added enter/exit_shortcode_context() methods - All shortcode render methods now enter context before data loading - When in shortcode context, the_content filter is always skipped This fully prevents infinite recursion when post content contains FediStream shortcodes that would otherwise recursively render. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-02-02 16:44:51 +01:00
magdev	eaefcff9c9	fix: Critical memory leak in TemplateLoader causing OOM errors All checks were successful Create Release Package / build-release (push) Successful in 57s Details - Added recursion depth tracking to prevent infinite loops from shortcodes in content - Nested items now skip the_content filter, using wp_kses_post() instead - Made get_artist_data(), get_album_data(), get_track_data(), get_playlist_data() public - Methods now accept both int post IDs and WP_Post objects - Added $load_nested parameter to control nested item loading Fixes memory exhaustion in Twig's StagingExtension when post content contains FediStream shortcodes that trigger recursive template rendering. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-02-02 16:37:43 +01:00
magdev	04201a66f8	docs: Update session history with CI/CD fixes Document all CI/CD pipeline fixes: - Gitea API for releases (not GitHub action) - Git submodule with relative URL - Composer path repository - gettext installation - SIGPIPE fix Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-01-29 18:46:06 +01:00
magdev	8ae703787c	chore: Reorder exclusions in release workflow Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-01-29 18:38:37 +01:00
magdev	c540cde0a4	docs: Update README for v0.4.0 - Update version badge to 0.4.0 - Add CI/CD badge - Add release package installation instructions - Add license key section - Add releases section - Update from-source instructions for submodules Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-01-29 18:35:06 +01:00
magdev	d96e3e3a4d	chore: Exclude .gitea and .gitmodules from release package Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-01-29 18:33:54 +01:00
magdev	20c879c065	fix: Handle SIGPIPE in package verification All checks were successful Create Release Package / build-release (push) Successful in 58s Details Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-01-29 18:27:22 +01:00
magdev	d104b0ae46	fix: Install gettext for msgfmt in CI Some checks failed Create Release Package / build-release (push) Failing after 56s Details Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-01-29 18:24:04 +01:00
magdev	98ddb63d44	fix: Use relative URL for submodule Some checks failed Create Release Package / build-release (push) Failing after 50s Details Relative URL allows CI to use the same access method as the main repo, avoiding networking issues with absolute URLs. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-01-29 18:21:21 +01:00
magdev	3dd2f4d126	feat: Use git submodule for private dependency Some checks failed Create Release Package / build-release (push) Has been cancelled Details - Add wc-licensed-product-client as git submodule in lib/ - Change Composer repository from VCS to path type - CI now checks out submodules recursively - Remove COMPOSER_AUTH (no longer needed) This solves the CI networking issue by fetching the dependency via git submodule instead of Composer. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-01-29 18:18:14 +01:00
magdev	dfa405c89b	fix: Add Composer auth for private repository in CI Some checks failed Create Release Package / build-release (push) Has been cancelled Details Use COMPOSER_AUTH with HTTP basic auth to access private wc-licensed-product-client repository during builds. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-01-29 17:11:05 +01:00
magdev	a7dbb7b4c5	fix: Use SRC_GITEA_TOKEN secret for releases Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-01-29 17:01:55 +01:00
magdev	efd3f7a170	chore: Update license client to ^0.2 Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-01-29 16:47:32 +01:00
magdev	077093765e	chore: Update license client to dev-main Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-01-29 16:44:04 +01:00
magdev	d4425103ea	fix: Use Gitea API directly for release creation Some checks failed Create Release Package / build-release (push) Failing after 3m6s Details The actions/gitea-release-action doesn't exist on GitHub. Use curl with Gitea API instead for reliable release creation. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-01-29 16:31:53 +01:00
magdev	02e2ed82ef	docs: Update session history for v0.4.0 CI/CD pipeline Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-01-29 15:43:34 +01:00
magdev	b21394c674	feat: Add Gitea Actions CI/CD pipeline for releases (v0.4.0) Some checks failed Create Release Package / build-release (push) Failing after 4s Details - Automated release builds triggered by v* tags - PHP 8.3 environment with production dependencies - Automatic translation compilation (.po to .mo) - Version verification (plugin version must match tag) - WordPress-compliant zip structure - SHA256 checksum generation - Package structure verification - Changelog extraction for release notes - Automatic Gitea release creation with attachments Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	2026-01-29 15:40:08 +01:00