0.4.0

Release 0.4.0

Features

• ui/update-model-context: New protocol method for guests to update their model context dynamically (#125)
• Enhanced sandbox capability negotiation: Improved CSP configuration with frameDomains, baseUriDomains, and Permission Policy support (#158)
• structuredContent with outputSchema: Example servers now use structured tool output (#220)
• Collapsible panels in basic-host: Improved host UI with collapsible sections and SDK types (#244)
• Dev mode with auto-restart: npm start now runs in dev mode with --watch for auto-restart (#246)

New Examples

• transcript-server: Live speech transcription example (#240)
• map-server: CesiumJS Map App with 3D globe visualization (#235)
• shadertoy-server: WebGL shader rendering example (#226)

Fixes

• Proper CSP handling in basic-host sandboxing via HTTP headers (#234)
• Align CSP sample with resourceDomains spec (#233)
• Error handling for server startup failures (#236)
• Update qr-server SDK to 0.3.1 (#247)

Other

• Add AGENTS.md and CLAUDE.md for AI assistant guidance (#218)
• Replace deprecated RESOURCE_URI_META_KEY with _meta.ui.resourceUri (#217)
• Restore educational comments in basic-server examples (#228)
• Add missing refresh-stats tool to system-monitor-server (#227)

Full Changelog: v0.3.1...v0.4.0

0.3.1

What's Changed

• fix registerAppTool signature (align on mcp ts sdk) by @ochafik in #219
• feat: add build app-with-deps target by @ochafik in #221
• fix: ensure lib is built before examples:build by @ochafik in #185
• chore: release 0.3.1 by @ochafik in #224

Full Changelog: v0.3.0...v0.3.1

0.3.0

What's Changed

• Fix build errors in examples by @jonathanhefner in #180
• fix: move prettier to dev dependency by @niclim in #179
• Add npm start alias for examples:start by @jonathanhefner in #183
• Clean up examples by @jonathanhefner in #182
• docs: fix tsc command to use tsconfig.json by @blackgirlbytes in #188
• [MCP Apps] Update viewport type by @martinalong in #153
• Add sheet-music-server example by @jonathanhefner in #196
• feat(examples): Add video-resource-server example by @antonpk1 in #175
• fix(examples): add missing server-utils.ts to video-resource-server by @antonpk1 in #205
• fix: Add missing origin parameter to PostMessageTransport default constructor, verify origins in example sandbox proxy by @ochafik in #207
• fix!: require eventSource in PostMessageTransport + add security tests by @ochafik in #208
• fix: make toolInfo.id optional per spec by @antonpk1 in #216
• feat: export method names as consts by @idosal in #192
• Make ui.resourceUri optional (for tools that just need visibility) by @ochafik in #210
• Add safeAreaInsets support to all example apps by @jonathanhefner in #202
• Add basic-server-* examples for Vue, Svelte, Preact, and Solid by @jonathanhefner in #141
• feat: publish example servers to npm by @jerome3o-anthropic in #184
• fix: make example host more resilient to broken servers by @ochafik in #206
• chore: release 0.3.0 by @ochafik in #204

New Contributors

• @niclim made their first contribution in #179
• @blackgirlbytes made their first contribution in #188

Full Changelog: v0.2.2...v0.3.0

0.2.2

What's Changed

• chore: bump to 0.2.2 + make Zod schemas version-agnostic (v3.25+/v4) by @ochafik in #178

Full Changelog: v0.2.1...v0.2.2

0.2.1

What's Changed

• fix(examples): use server.registerTool for non-UI tool + fix missing imports by @ochafik in #173
• [MCP Apps] Add way to pass custom fonts by @martinalong in #159
• [MCP Apps] Add forgotten style variable by @martinalong in #174
• chore: release 0.2.1 - widen @oven/bun-* version range by @ochafik in #176

Full Changelog: v0.2.0...v0.2.1

0.2.0

What's Changed

• feat(examples): add SSE transport support and shared server utility by @ochafik in #136
• Add BYO zod version support by @fredericbarthelet in #49
• examples: make basic apps responsive for narrow viewports by @ochafik in #135
• tests: add Playwright E2E tests with screenshot golden testing (+ fix examples session handling) by @ochafik in #115
• api: optional Client in AppBridge (allow custom forwarding), better protocol types (AppRequest, AppNotification, AppResult) by @ochafik in #146
• docs: typo and formatting issues in spec header by @idosal in #148
• fix: add mimeType to resource declarations in examples by @antonpk1 in #149
• fix: ensure E2E screenshot tests work consistently across CI and local by @ochafik in #150
• [MCP Apps] Add styles prop to host context by @martinalong in #127
• [MCP Apps] Have apps request display mode instead by @martinalong in #152
• Add pre-commit check for private registry URLs in package-lock.json by @ochafik in #133
• Mark src/generated as linguist-generated by @jonathanhefner in #154
• fix: Windows compatibility - bun as optional dep, cross-env for examples by @ochafik in #145
• fix: make react a peer dependency to support multiple versions by @ochafik in #164
• Fix sandbox-proxy-ready notification name in spec by @ochafik in #160
• feat: add server helpers, make connect() to default to parent post transport by @ochafik in #165
• docs: add tool visibility and restructure _meta.ui by @antonpk1 in #131
• refactor: rename request methods to remove send prefix by @ochafik in #161
• feat: make MCP SDK a peer dependency by @ochafik in #168
• chore: release 0.2.0 by @ochafik in #170

New Contributors

• @fredericbarthelet made their first contribution in #49
• @martinalong made their first contribution in #127

Full Changelog: v0.1.0...v0.2.0

0.1.0

What's Changed

Spec / API changes:

• feat: implement ui/notifications/tool-cancelled + add missing App.onteardown by @ochafik in #120
• feat: store and expose hostContext in App class by @ochafik in #139
• spec: add media-src to CSP for video and audio support by @aharvard in #109
• spec: fix: ui/tool-cancelled -> ui/notifications/tool-cancelled by @idosal in #118
• spec: fix: host may request user consent by @idosal in #126
• build: auto-generate Zod schemas from TypeScript types using ts-to-zod by @ochafik in #116
• examples: add wiki-explorer-server example by @jonathanhefner in #122

Other PRs:

• chore: update @modelcontextprotocol/sdk to 1.24.3 by @ochafik in #117
• Preserve existing files on gh-pages during docs deploy by @jonathanhefner in #121
• refactor(examples): use concurrently API for proper process cleanup by @ochafik in #128
• add npm version badge by @ochafik in #113

New Contributors

• @aharvard made their first contribution in #109

Full Changelog: v0.0.7...v0.1.0

0.0.7

What's Changed

• Fix mimeType, CSP settings and QR code example by @antonpk1 in #111
• release: 0.0.7 by @ochafik in #114

Full Changelog: v0.0.6...v0.0.7

0.0.6

What's Changed

• release: 0.0.6 by @ochafik in #112

Full Changelog: v0.0.5...v0.0.6

0.0.5

What's Changed

• Smoothen the process of getting started by @jonathanhefner in #103
• Add checkpoints and callouts to quickstart guide by @jonathanhefner in #93
• Deploy docs to GitHub Pages on release by @jonathanhefner in #104
• Add RESOURCE_MIME_TYPE constant by @ochafik in #108
• Add QR code Python MCP server example by @antonpk1 in #105
• Update README.md by @ochafik in #107
• release: 0.0.5 (fix release config again) by @ochafik in #110

Full Changelog: v0.0.4...v0.0.5