v0.7.0

MCP Adapter 0.7.0 adds support for MCP 2026-07-28 and moves protocol output to exact-revision schemas. It is also the first release published to the WordPress.org plugin directory.

Before you upgrade

This release has breaking changes for code that extends the adapter:

• The generated DTO classes, the McpToolValidator, McpResourceValidator, and McpPromptValidator classes, and the mcp_adapter_validation_enabled filter have been removed.
• Custom transports must delegate to HttpRequestHandler or McpWireOrchestrator.
• Components that are invalid in every supported revision are now rejected instead of silently repaired.

Using MCP Adapter as a bundled Composer library is deprecated. Install the plugin instead.

Read the v0.7.0 migration guide before you upgrade.

Highlights

• MCP 2026-07-28: sessionless server/discover, per-request protocol metadata, and the Mcp-Method, Mcp-Name, and Mcp-Param-* headers over HTTP.
• Clients that request 2025-06-18 or 2024-11-05 still connect, and are served through the 2025-11-25 schema.
• Direct callable tools can request elicitation input under 2026-07-28 with McpInputRequired.
• Default abilities register even when another plugin initializes the Abilities API first.

See CHANGELOG.md for the full list of changes.

What's Changed

• docs: rebuild readme.txt for the WordPress.org listing by @abhi3315 in #285
• docs: change recommendation to be installed as a canonical plugin by @stormrockwell in #289
• docs: migrate deprecation information to docs/README.md by @steviepee in #291
• ci: implement Playground blueprint.json and PR Previews by @justlevine in #304
• ci: bump dev-deps and Tested up to header by @justlevine in #302
• feat: deprecate usage of MCP Adapter as bundled dependency by @matiasbenedetto in #288
• tests: run tests against PHP 8.5 by @justlevine in #303
• dev!: Mark WP\MCP\Cli classes as final and cleanup internals by @justlevine in #306
• Fix wp-env builds for PHP 7.4 and 8.0 after Debian bullseye end of life by @galatanovidiu in #322
• ci: update Playground PR preview workflows to v4 by @obenland in #334
• Support exact MCP 2025-11-25 and 2026-07-28 revisions by @galatanovidiu in #310
• Let the schema reject malformed component data instead of repairing it by @galatanovidiu in #319
• Support elicitation input requests on direct tool calls by @galatanovidiu in #316
• Register default abilities before the Abilities API initializes by @galatanovidiu in #339
• Stop MCP Adapter from reporting its own classes as another loaded version by @galatanovidiu in #341
• Prepare the 0.7.0 release by @galatanovidiu in #342
• chore: address PRT feedback by @justlevine in #346
• ci: add WORG deployment step to release.yml by @justlevine in #347
• Add wp.org banner & icon assets by @saarnilauri in #353
• Add SVG source for the wp.org banner by @saarnilauri in #358
• docs: replace refs to AI Plugin with MCP Adapter by @justlevine in #360
• Revert "Fix wp-env builds for PHP 7.4 and 8.0 after Debian bullseye end of life" by @justlevine in #344
• dev!: bump minimum node to v24.15 by @justlevine in #354
• Fix the 0.7.0 release ZIP fatal error and verify the ZIP before publishing by @galatanovidiu in #362

Dependency updates from Dependabot are not listed. See the full changelog link below.

New Contributors

• @abhi3315 made their first contribution in #285
• @steviepee made their first contribution in #291
• @matiasbenedetto made their first contribution in #288
• @obenland made their first contribution in #334
• @saarnilauri made their first contribution in #353

Props

Thank you to everyone who wrote, reviewed, or discussed the changes in this release: @justlevine, @jeffpaul, @gziolo, @andreilupu, @abhi3315, @matiasbenedetto, @dugyen, @webmyc, @dkotter, @stormrockwell, @saarnilauri, @georgestephanis, @steviepee, @obenland.

Full Changelog: v0.6.1...v0.7.0