AI Engine – The Chatbot, AI Framework & MCP for WordPress

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3.7.0 (2026/08/03)

• Fix: Qdrant collections were always created with 1536 dimensions regardless of the embedding model, and default dimensions are now read from the right place.
• Update: Embedding dimensions are no longer locked for OpenAI-compatible models, as that size is only a guess.
• Fix: The MCP access level no longer restricts OAuth connections, and the setting is no longer hidden behind the bearer token.
• Fix: MCP connections no longer drop at random when the client refreshes its access token.

3.6.9 (2026/08/01)

• Fix: Crash when clicking quickly through discussions, and slow image checks writing into the wrong message.
• Fix: MCP token refresh being rejected on servers that pass Basic credentials to PHP instead of forwarding the header.
• Fix: Stored chat messages could run scripts when an admin opened a discussion.

3.6.8 (2026/08/01)

• Fix: Workspace mobile app connection on servers that don’t expose the Authorization header, with clearer pairing errors.
• Fix: A Context Max Length of zero no longer empties posts, which blocked embeddings sync and blanked chatbot context.
• Update: Transcription now defaults to gpt-4o-mini-transcribe instead of whisper-1.
• Update: The mobile connection warning links to the troubleshooting page instead of showing the htaccess snippet.
• Add: Logging on the MCP OAuth token endpoint for failing refreshes.

3.6.7 (2026/07/31)

• Add: Workspace is officially launched on iOS.
• Update: OpenAI pricing for GPT-5.6 Terra and Luna following the July 30 cut, and corrected o3 which was priced 7.5x too high.
• Update: Removed the leftover mcp.js relay and its documentation, and corrected the MCP header comment that still mentioned SSE and OAuth.
• Add: getDiscussion() to the PHP API, to read a stored discussion without using $mwai_core.

3.6.6 (2026/07/30)

• Update: Minimum PHP version is now 8.1, declared in the plugin header so WordPress blocks activation on older versions.
• Fix: Push All no longer exhausts the memory limit on large sites; post content is now checked in chunks.
• Fix: Long Japanese and Chinese posts no longer produce empty content, which left their embeddings stale.
• Fix: Hardened the REST endpoints against client-supplied file paths and API keys, corrected the MCP OAuth route match and guest session cookie, and stopped the chatbot key reaching Editors.
• Fix: The mwai_mcp_callback filter now receives five arguments from both the Workspace and the MCP endpoint.
• Add: CSV and JSON export for the Query and MCP logs, honouring the active filters and sort.
• Fix: Chatbot input is no longer hidden behind the mobile keyboard in fullscreen, and shortcuts are now chips that don’t inherit the site’s button styles.

3.6.5 (2026/07/28)

• Add: Elapsed time counter on the AI Forms submit button, matching the chatbot.
• Add: Note in the Sync panel that the Sync filters are shared by all environments.
• Fix: Three security issues reported by WPScan (key disclosure to editors, guessable guest sessions, audio transcription file read).
• Fix: Streaming requests now respect MWAI_SSL_VERIFY and verify TLS certificates (reported by Mohammed Abd Alrahman).
• Fix: Recurring tasks no longer stay parked after repeated failures, so discussions and logs cleanups run again.
• Fix: Administrator-equivalent accounts (custom roles with manage_options) are no longer refused at the MCP OAuth consent screen.
• Fix: A custom JavaScript filter that crashes no longer breaks the chatbot, and raw JavaScript errors are no longer shown to visitors.
• Fix: The embeddings environment Type field no longer shows “Select” for the Internal (WordPress DB) environment.
• Fix: The Web Search button now appears in the Workspace composer when pinned.
• Update: Push All now respects the Sync category and language filters, so it no longer seeds posts Sync would not maintain.
• Update: Workspace is now available to everyone; Knowledge, MCP Servers and Functions stay Pro.
• Update: Removed the unused module_addons and module_blocks option defaults.

3.6.3 (2026/07/27)

• Add: Workspace: a full-screen chat surface in wp-admin, with a model picker across all your environments, conversation history, folders, a prompt library, per-user themes, and edit-and-branch on any message. Available in the Pro, coming later in the Free.
• Add: The Workspace can generate and edit images, search the web with each provider’s own search tool (OpenAI, Anthropic, Google, OpenRouter), and work on the site itself through the MCP tools, with an approval dialog before any site-changing tool runs.
• Add: QR-code pairing for the Workspace mobile companion app, with a revocable Application Password.
• Add: Internal (WordPress DB) vector environment that stores embeddings locally, now the default for new installs.
• Add: Discussions now show the tool calls and their parameters alongside the embeddings usage, and can be searched server-side by content and title.
• Add: Claude Opus 5.
• Fix: Public chat and form endpoints no longer trust client-supplied models, environments, instructions or messages, and internal errors are hidden from visitors; the stateful-response restore is now owner-scoped, so another user’s chat ID can no longer resume their conversation.
• Fix: Content-aware chatbots no longer inject a post the visitor cannot read, so a client-supplied context ID can no longer leak draft or private content.
• Fix: Chatbot error and notice messages are sanitized before being rendered as HTML, and configuration errors are shown to editors only instead of being printed publicly.
• Fix: Function calling is more reliable: Claude no longer re-calls tools with the previous message’s parameters, multi-round calls on stateless providers keep their feedback blocks instead of clearing them each round, and the Gemini 2.x models work again.
• Fix: Google model names and capability detection, so image, thinking and web-search models are recognised and preview variants are no longer ambiguous.
• Fix: OVH replies arriving empty, caused by an oversized max_tokens and a hijacked catalog fetch.
• Fix: Embeddings re-sync destroying a vector when the new content comes back empty, and guest file listing crashing with a 500.
• Fix: The usage-limit lock never firing on streaming chatbots, and the Discussions table spinning forever when opened in a background tab.
• Update: MCP server hardening: a failing tool now returns a readable error instead of killing the server for the client, and the tools list is capped at 500 results.
• Update: Settings Reset now asks you to type the site host and says plainly that it deletes the API keys, environments, chatbots and themes; more native browser dialogs were replaced with NekoModal across Discussions, Query Logs, Knowledge, Templates and Limits.

3.6.2 (2026/07/16)

• Fix: Fixed block editor paragraph spacing broken by the AI Copilot handler wrapper.
• Add: Note filtering support for the wp_get_comments MCP tool, allowing agents to read WordPress 6.9 editor Notes.
• Fix: Fixed the Anthropic engine dropping conversation history on function-call follow-up requests.
• Fix: Fixed duplicate embedding vectors for the same reference and environment, which left embeddings stuck at pending after a sync.

3.6.1 (2026/07/13)

• Fix: MCP user tools not enforcing proper capabilities, allowing Multisite site administrators to edit users beyond their reach. Hotfix. (Thanks to Charles Vosburgh for reporting.)
• Fix: MCP read tools corrupting block-JSON Unicode escapes by double-unslashing database content.
• Update: Native browser dialogs (alert/confirm/prompt) are now forbidden in code; NekoModal is used instead.

3.6.0 (2026/07/10)

• Add: GPT-5.6 family (Sol, Terra, and Luna) to OpenAI models, with Sol marked as the latest.
• Fix: Gemini image models not being selectable when their ID lacks a -preview suffix.
• Fix: MCP media upload tool crashing on download errors and rejecting extensionless image URLs.

3.5.9 (2026/07/06)

• Fix: MCP post meta tools double-serializing array values, which stored nested arrays as strings.
• Fix: MCP wp_create_post and wp_update_post tools stripping shortcodes, email HTML, and inline CSS for admin-authorized callers.
• Fix: Chatbot theme styles loading outside AI Engine’s admin screens, which caused Gutenberg editor iframe warnings.
• Fix: simpleJsonQuery failing on Anthropic and Google environments by no longer forcing an OpenAI fallback model, with a clearer error message.
• Fix: Discussions and Queries timestamps now display in the site’s configured timezone instead of the browser’s.
• Fix: MCP Functions settings crashing when tools were registered due to the list being returned as an object instead of an array.
• Fix: OpenAI Vector Store Pull All failing with a limit error by paginating the file list.
• Update: WordPress MCP tools are now enabled by default.

3.5.8 (2026/07/03)

• Fix: Code blocks now display correctly in the Timeless and Foundation chatbot themes (was using proportional font instead of monospace).
• Fix: Sonnet 5 breaking with “each thinking block must contain thinking” when streaming with function calling.
• Fix: MacOS chatbot container showing empty notches in the corners due to double-rounded borders.
• Update: Reorganized the admin UI — Modules tab now leads with “Chatbots & Knowledge” and “MCP & Agents”, and Settings tabs were reordered to match.
• Update: Moved the Event Logs option from Settings → AI to Settings → Chatbot for easier discovery.
• Update: Enlarged the chatbot preview pane in settings (480px → 620px) and polished the ChatGPT theme with monospace code blocks, accent border on focused input, and smoother transitions.
• Update: Refined the Messages chatbot theme with monospace code blocks, readable links in user bubbles, input focus ring, and capped bubble width.
• Add: Gutenberg MCP tools: wp_write_blocks, wp_list_block_patterns, and wp_insert_block_pattern.
• Add: Nonce checks added to license, rating, and news notice forms.

3.5.7 (2026/07/01)

• Fix: Chroma “Pull All” now returns all pages of large collections instead of only the first page.
• Add: Claude Sonnet 5 model support.
• Fix: Anthropic function-calling loops no longer fail when no explicit max tokens is set.
• Fix: Gemini Interactions engine now properly includes RAG context, chat history, and PDF uploads, and passes connection tests.
• Add: In-chat image output and stream error handling for Gemini Interactions.
• Fix: Outbound API calls now verify TLS certificates by default.
• Update: Credited Shivamani Vastrala and Meher Sudhakar Abbireddi (via WPScan) for reporting the security issues fixed in 3.5.5.

3.5.6 (2026/06/26)

• Add: Gemini Interactions API engine as the default for Google, with streaming, function calling, and in-chat image generation (classic API kept as a fallback).
• Add: Google Search and Maps grounding as Gemini chatbot tools, plus a setting to fall back to the standard Gemini API.
• Add: MCP server support to Realtime voice chatbots — tools were selectable but previously did nothing — and the model now speaks tool results aloud.
• Add: mwai_mcp_mutate action that fires after any content-mutating MCP tool, letting integrations purge caches, reindex, or audit.
• Add: raw option to the MCP wp_get_option tool to read directly from the database, bypassing object cache and filters.
• Add: author__not_in to MCP wp_get_posts, and a content_format=prose option to wp_get_post/wp_get_post_snapshot that strips block-attribute JSON to reduce token usage.
• Fix: wp_create_post MCP tool no longer corrupts shortcode and HTML content via the markdown parser.
• Fix: MCP log entries mislabeled as OAuth; admin and bearer calls now display correctly.
• Fix: Streaming parallel tool calls leaving a null in the tool_calls array, which broke function calling on strict providers.
• Fix: MCP wp_get_posts, wp_get_media, and wp_get_comments filters by author, user_id, and email were accepted but silently ignored.
• Fix: wp_update_option now decodes JSON-string array values into real arrays before saving, preventing corruption of array options like sticky_posts.
• Fix: Chatbot events panel is now scrollable and error messages are dismissable.
• Update: Removed the legacy MCP SSE transport, keeping only the Streamable HTTP endpoint.
• Update: Enabled function calling for Mistral.
• Update: Uploaded images now fill the message bubble width in the chatbot across all themes.
• Update: MCP post tools now accept ID, post_id, or id interchangeably, and wp_update_post accepts top-level fields with clearer error messages.

3.5.5 (2026/06/20)

• Fix: Path traversal vulnerability in create_image and prevented chatbot discussions from being taken over by another logged-in user.
• Fix: Add-ons were reported as disabled whenever options were fetched outside the admin context.
• Fix: Max Tokens entered with a thousands separator (e.g. the Danish “64.000”) was read as 64 and capped responses.
• Fix: Content Aware placeholders now resolve automatically in chatbot instructions without requiring a toggle.
• Fix: Setup Assistant no longer shows “Connect an AI Provider” as incomplete when only the Fast model is deprecated.
• Fix: Realtime instructions now resolve placeholders like {FIRST_NAME} into their values.
• Fix: MCP tools generated from WordPress REST endpoints could break Google Gemini due to enum on non-string types.
• Fix: Changing the type of an AI environment now drops fields from the previous type (endpoint, region, deployments), preventing engines from calling the wrong provider’s endpoint.
• Fix: The “Default AI Environment not configured” warning no longer appears when a Chroma embeddings environment generates its own vectors.
• Fix: The Usage widget on the Dashboard no longer overflows its panel when numbers are wide.
• Fix: Anthropic’s streaming ping keepalive events are now ignored instead of being logged as an unknown stream data type.
• Update: Reworked embeddings sync — pages are no longer marked stale without real changes, the background task (now called Maintenance) runs for all environments, processes batches within a time budget, no longer gets blocked by a failing vector, and can be disabled in Settings > Knowledge > Sync Settings.
• Update: API key and token fields are now masked with an eye toggle to reveal them.
• Update: Marked the original GPT-5 models (gpt-5, gpt-5-mini, gpt-5-nano, gpt-5-pro) as deprecated per OpenAI’s December 10, 2026 shutdown.
• Update: The fullscreen resize button now uses thin corner-bracket icons that match the close button.
• Update: OpenAI Vector Store document uploads now accept multiple files at once.
• Add: User Memory added to the add-ons list.
• Add: Optional capability filter for get_chatbots() to fetch only chatbots whose model supports function calling.
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3.5.4 (2026/06/10)

• Fix: Hold to Talk button on mobile Realtime chatbot no longer triggers the context menu (copy, select) when held.
• Update: Images and files can now be sent without a text message; engines skip the empty text part for providers that reject it.
• Fix: Sending is now blocked while a file is still uploading, with a spinner on the send button and a progress bar on the file preview until upload completes.
• Fix: Eliminated the gap between the chatbot and the keyboard on iOS by locking body scroll while the mobile chatbot is open.
• Fix: Anthropic safety refusals now show a readable message instead of an empty reply.
• Add: Claude Fable 5 model. Marked Claude Sonnet 4, Opus 4, and Opus 4.1 as deprecated.
• Add: Web search support for OpenRouter via the Tools & Capabilities section.
• Add: Full Screen view for Discussions, a Discussions count on the Dashboard, and fixed filenames with underscores being rendered as italics in the admin discussion view.
• Update: AI provider connectors now mentioned in the readme description.
• Update: PDF import now remembers the Density, Overlap, and filename-as-title settings between imports.
• Fix: OpenClaw link in the readme now points to our own article.
• Update: Marked GPT Image 1.5 and GPT Image 1 Mini as deprecated; default image model moved to GPT Image 2.
• Fix: PHP 8.2+ deprecation warning caused by an undeclared $extraData property on Meow_MWAI_Reply.
• Add: Embeddings sync can now be restricted to specific Polylang languages via a comma-separated languages field.
• Fix: wp_alter_post regex mode now handles patterns containing “/” (e.g. Gutenberg block markers) and returns the actual PCRE error instead of a generic one.

3.5.3 (2026/05/28)

• Fix: Filenames with underscores (e.g. Some_File_2026.pdf) were getting partially italicized by the chatbot’s markdown renderer.
• Fix: ReferenceError (data is not defined) in the chatbot response handler that masked the real error message when a host returned a non-JSON body.
• Fix: The Push All button showed “(null)” when a post type had zero matching posts.
• Fix: The wp_update_option MCP tool schema no longer logs a “problematic union type” warning on every list_tools call.
• Fix: The Meow Apps menu icon now shows correctly in both the expanded and collapsed sidebar states.
• Fix: Hotfix for the MCP endpoint URL being hidden until a bearer token was generated, even though OAuth doesn’t need one. It now appears as soon as the MCP Server is enabled.
• Add: Claude Opus 4.8 to the Anthropic model list, with the latest tag moved to it.
• Add: AI Forms multi-upload fields now stack new file selections on top of previous ones, with a staged list and per-file remove buttons.
• Add: mwai-bouncing-loader and mwai-bouncing-dot CSS classes to the chatbot loading dots for custom styling.
• Add: MCP Logs view in Insights with per-tool-call capture, status, duration, and a top tools widget.
• Add: MCP Connection Test in MCP Server settings that detects host-level WAF blocks (e.g. WP Engine’s default) before they surface in claude.ai.
• Update: Aligned Forms and Playground markdown rendering with the chatbot so single newlines now produce visible line breaks.
• Update: Extended CORS headers on MCP endpoints with Mcp-Protocol-Version, Mcp-Session-Id, Accept, and Last-Event-ID for browser-context MCP clients.
• Update: Claude Sonnet 4 and Opus 4 (2025/05/14) marked as deprecated ahead of Anthropic’s 2026-06-15 retirement date.
• Update: The chatbot Functions empty state now tells Free users that function calling is Pro-only.
• Update: Polished the plugin readme description with cleaner punctuation and brand consistency.

3.5.2 (2026/05/22)

• Add: Setup Assistant on the Dashboard that walks through essential configuration with a progress bar and per-step actions.
• Add: Direct file upload to OpenAI Vector Store via a new Documents tab, with async status polling, Sync from OpenAI action, and clearer PHP upload-limit errors.
• Add: setField and prefill methods to the AI Forms JS API for setting values programmatically without manual dispatchEvent workarounds.
• Update: Redesigned the Dashboard Usage panel into an analytics card with headline, week-over-week delta, daily bar chart, and provider/peak/average/per-query tiles.
• Update: Reorganized the Modules tab into clearer sections with short intros, concise descriptions, renamed Utilities to AI Copilot, and surfaced MCP and Public API as proper modules.
• Update: Renamed the user-facing “Units” metric to “Tokens” across the dashboard, queries explorer, insights, and [mwai_stats] shortcode, with full back-compat on REST output and legacy settings.
• Update: Aligned the Discussions, Insights, and Knowledge layouts by standardizing column ratios and removing custom margin and header overrides.
• Update: Added a Refresh button to the Usage panel header, widened the Tokens column in Queries Explorer, and showed “N/A” for queries with no scope.
• Update: MCP tool-registration warnings are now always written to the PHP error log instead of requiring the debug logging flag.
• Fix: Stripped inline citation markers from OpenAI’s file_search Responses API text that were surfacing as gibberish in chatbot replies.
• Fix: Stopped embedding the sessionId in chatbot and forms HTML for logged-out visitors, so page caches no longer share one sessionId across all visitors.
• Fix: Guarded REST AI endpoints so they no longer overwrite the cookie-derived session with an empty client-sent sessionId.
• Fix: Gemini embedding queries no longer report bogus token counts by correctly reading promptTokenCount from the response.
• Fix: Dynamic MCP REST tool schemas no longer serialize the meta arg on media/posts/pages as an array, which Claude’s MCP validator was rejecting.
• Fix: Translate Post now translates list items inside modern Gutenberg lists, which were silently skipped since WP 6.1+.

3.5.1 (2026/05/17)

• Add: Popup Icon Size option in chatbot settings to resize the popup trigger without custom CSS.
• Fix: Chatbots admin preview now keeps long discussions, fullscreen toggles, and resize actions contained within the preview pane instead of clipping or overflowing the viewport.
• Fix: Chatbot rendering bug where a $ inside an inline code span caused other message text to leak into the code display.

3.5.0 (2026/05/16)

• Fix: MCP OAuth authorization and token validation now require administrator capability, preventing privilege escalation by non-admin users.
• Update: Marked gpt-5.2-chat-latest and gpt-5.3-chat-latest as deprecated (OpenAI shutting them off August 10, 2026).
• Update: Added a deprecation banner on the Finetunes screen due to OpenAI sunsetting self-serve fine-tuning.
• Fix: CSV import for fine-tuning now shows an explicit error when no usable prompt/completion columns are found.
• Fix: Updated the broken OpenAI tutorial link on the Finetunes screen.

For older releases, see changelog.txt.