[JoshLove-msft]

Summary

Enable the Azure C# data-plane, management-plane, and provisioning emitters in the Azure standalone and website playgrounds using the shared libraries/deferredEmitters configuration, following the TypeSpec playground approach.

Both playgrounds load each emitter's published latest.json browser import map from TypeSpec package storage. The standalone playground registers emitters whose maps load successfully. The website merges these additional maps only for the latest compiler selection, not historical versions. Browser emitter modules remain deferred until selected.

Keep the C# emitters out of npm dependencies and Vite's locally bundled libraries. Convert the locally generated native import map to importmap-shim so existing local libraries remain resolvable after adding remote shim maps. No /generators catalog loader or custom C# mock tests are included.

Relates to Azure/azure-sdk-for-net#64101.

Prerequisites

Azure/azure-sdk-for-net#64544 and microsoft/typespec#12497 have merged the browser artifact publication and hosted Azure generator deployment implementations. Actual publication of the three emitter import maps and deployment of the hosted generators remain rollout prerequisites; their completion and end-to-end Azure C# generation have not been verified here. This PR does not publish artifacts or deploy the service. The loading review thread remains open pending end-to-end evidence.

Validation

Current head: 3b3959635899615792a1a53e1539359a00580d7a.

• CI builds passed on Ubuntu with Node 22, 24, and 26, and Windows with Node 24 and 26. Windows Node 22 is still running as of this update.
• Website, Format, Lint, Check Changes, and preview checks passed.
• The E2E job failed in eng/feeds/test/init-templates.e2e.ts: both standalone template validation tests fail during npm install with ERESOLVE. The generated projects request @typespec/rest@^0.88.0, while published @azure-tools/typespec-azure-core@0.73.0 requires @typespec/rest@^0.87.0. Those feed templates, tests, and package versions are unchanged by this PR. No peer-dependency bypass or unrelated template change was made.
• The job failure does not establish a passing playground browser E2E run. Actual Azure C# generation remains unverified.

These are current-head CI results, not the removed catalog-loader tests or validation from earlier revisions.

[github-actions]

No changes needing a change description found.

[github-actions]

📦 Package size report

4 packages changed size, +22.59 KB (+0.1%) packed overall.

Package	Packed (base → head)	Δ Packed	Unpacked (base → head)	Δ Unpacked
@azure-tools/typespec-go	290.61 KB → 303.39 KB	+12.78 KB (+4.4%) 🔴	1.48 MB → 1.55 MB	+71.91 KB (+4.7%) 🔴
@azure-tools/azure-http-specs	150.23 KB → 155.02 KB	+4.79 KB (+3.2%) 🔴	1.25 MB → 1.27 MB	+26.52 KB (+2.1%) 🔴
@azure-tools/typespec-azure-core	140.92 KB → 144.66 KB	+3.74 KB (+2.7%) 🔴	753.75 KB → 771.39 KB	+17.64 KB (+2.3%) 🔴
@azure-tools/typespec-azure-rulesets	6.06 KB → 6.21 KB	+154 B (+2.5%)	36.10 KB → 38.47 KB	+2.38 KB (+6.6%) 🔴

10 package(s) with no notable change

Package	Packed (base → head)	Δ Packed	Unpacked (base → head)	Δ Unpacked
@azure-tools/typespec-ts	550.68 KB → 551.24 KB	+578 B (+0.1%)	2.75 MB → 2.76 MB	+1.92 KB (+0.1%)
@azure-tools/typespec-azure-resource-manager	210.53 KB → 210.18 KB	-363 B (-0.2%)	1.26 MB → 1.26 MB	-1.79 KB (-0.1%)
@azure-tools/typespec-client-generator-core	264.20 KB → 264.53 KB	+334 B (+0.1%)	1.40 MB → 1.40 MB	-3.28 KB (-0.2%)
@azure-tools/typespec-azure-examples	96.70 KB → 96.99 KB	+297 B (+0.3%)	486.12 KB → 487.04 KB	+944 B (+0.2%)
@azure-tools/typespec-autorest	88.49 KB → 88.65 KB	+159 B (+0.2%)	427.62 KB → 427.94 KB	+325 B (+0.1%)
@azure-tools/typespec-python	42.58 KB → 42.66 KB	+82 B (+0.2%)	166.02 KB → 166.15 KB	+139 B (+0.1%)
@azure-tools/typespec-java	20.23 MB → 20.23 MB	+71 B (+0.0%)	22.53 MB → 22.53 MB	+139 B (+0.0%)
@azure-tools/typespec-azure-portal-core	36.32 KB → 36.33 KB	+3 B (+0.0%)	243.05 KB → 243.09 KB	+43 B (+0.0%)
@azure-tools/typespec-autorest-canonical	7.42 KB → 7.42 KB	—	26.00 KB → 26.00 KB	—
@azure-tools/typespec-metadata	15.88 KB → 15.88 KB	—	62.08 KB → 62.08 KB	—

_{Packed = gzipped .tgz published to npm. Unpacked = total extracted size. 🆕 added, 🗑️ removed. Packages from the core/ submodule are not included.
🔴 grew · 🟢 shrank — only changes of at least 512 B and 0.5% are marked.}

[azure-sdk-automation]

You can try these changes here

🛝 Playground	🌐 Website