## Summary Complete Validate for large projects with linked MDX content, using the same validation API in the dialog and MCP. Publishing continues independently of diagnostics. - Load MDX sources omitted from the embedded artifact and report storage failures with typed diagnostic reasons. - Reuse parsed MDX and template scope indexes; cache source reads in the shared asset loader. - Exclude conservative non-MDX query candidates while retaining explicit invalid references for diagnostics. - Give validation requests a 60-second server execution budget. - Support both server bundles in E2E tests and make OAuth logging initialization repeatable. - Raise the project bundle import limit from 20 to 32 MiB to reproduce the customer project. ## TODO / acceptance checklist - [x] Import and inspect the customer project locally and on staging. - [x] Reproduce missing embedded MDX sources and slow template materialization. - [x] Load omitted MDX sources and discover nested template dependencies. - [x] Report source-read failures using typed reasons rather than matching error messages. - [x] Reuse template scope indexes and remove duplicate source caching. - [x] Route dialog Validate through the same API as MCP, after flushing editor content. - [x] Preserve publishing in parallel with diagnostics, including failed or unfinished checks. - [x] Fix JSON collection files being treated as MDX query candidates. - [x] Preserve explicit invalid file references so they still produce diagnostics. - [x] Fix E2E routing across both generated server bundles and repeated OAuth logging initialization. - [x] Demonstrate the new review regressions fail before the fixes and pass after them. - [x] Run targeted tests, relevant typechecks, lint, formatting, package boundaries, and generated API checks. - [x] Run the full fixture pipeline and production builder build; no generated fixture changes. - [x] Build the exact staging project locally after the final review changes. - [x] Validate the exact staging project through MCP/CLI after the final deployment. - [x] Complete an actual staging publish after the final deployment. - [x] Address PR comments: simplify the stream mock, explain every diagnostic reason, and retain the existing diagnostic code contract. - [x] Review documentation impact; these fixes restore expected behavior and require no user instruction changes. - [x] Finish CI on the final commit, including all six Builder E2E shards. ## Verification Local checks passed: 179 project-build tests, 78 CLI prebuild tests, 8 asset publication tests, 42 server tests, and 9 publish UI/helper tests. The imported staging project also builds successfully. The new explicit-reference regression and repeated-initialization regression both failed before their fixes and passed afterward. A production build serves the login route and dispatches tRPC requests to its separate server bundle. Validation on staging project `b9d23e54-5dbf-45c4-b6d8-bc4cf842a468` completed in 25.3 seconds after deployment and 23.5 seconds after publishing: 92 documents included, 0 omitted, and 0 MDX errors. The [original staging publish job rerun](https://github.com/webstudio-is/webstudio-saas/actions/runs/36647770120/job/109819143695) succeeded end to end with the final artifact, including CLI/Remix builds, worker deployment, and database updates. [CI on commit `01a9d772dc`](https://github.com/webstudio-is/webstudio/actions/runs/36696154831) is green, including all six Builder E2E shards and Windows/Ubuntu fixture checks. The comment follow-ups simplify the publication test mock and document all diagnostic reasons. Production behavior is unchanged. The 8 publication tests, 6 schema tests, package typecheck, formatter, and lint pass. Disabling the source cache makes the simplified regression fail as expected. Final staging validation passed in 27.1 seconds with 92 documents and no omissions or MDX errors. One additional publish attempt hit a database statement timeout during project sync, before the build. A [retry with no code changes succeeded end to end](https://github.com/webstudio-is/webstudio-saas/actions/runs/36647770120/job/109826767589). CI is green on `01a9d772dc`. Ref #3550
Protocol
@webstudio-is/protocol owns Webstudio data exchange protocols.
The project bundle is the external export/import artifact used by sync, local
.webstudio/data.json, project import, transferred asset files, and prebuild.
This package owns the assembled bundle schemas, transfer RPC payloads, and
bundle compatibility/version helpers.
Domain models such as pages, assets, and serialized builds remain owned by their domain packages and are composed here through schema-only entrypoints. Do not copy those schemas into this package.
Terminology
Project bundle is the authoritative external project artifact. It is used by
sync, .webstudio/data.json, project import, transferred asset files, and
prebuild.
Data envelope is a serialized single-key object whose key is a versioned
Webstudio marker, for example { "@webstudio/instance/v0.1": data }. The
envelope identifies the payload version and lets consumers detect malformed
Webstudio-owned data before falling back to other formats.
Transfer data is the domain payload inside a data envelope. Examples include
InstanceTransferData, InstancesTransferData, and PageTransferData.
Transfer data is portable and detached from a project; insertion/import remaps
ids and merges it into authoritative project state. Runtime-owned transfer
formats live in @webstudio-is/project-build/transfer.
Clipboard data is a UI transport concern. Builder copy/paste may serialize transfer data into a data envelope and place it on the browser clipboard, but runtime and protocol code should name the reusable format as data envelope or transfer data, not clipboard.