[Yuchao Yan (msyyc)]

Comparison only — do not merge

Show the Azure AI Projects generated SDK changes caused by
microsoft/typespec#12342.

This draft deliberately targets users/msyyc/compare-typespec-12342-baseline,
not SDK main. The baseline contains freshly generated output from the current
TypeSpec main generator. This keeps SDK customizations and unrelated regeneration
changes out of this PR's diff.

Reproduction

• TypeSpec main generator: d771b29578e9bcb5ad240e705cbabe4210e8e9d3.
• TypeSpec PR Update README.md in OC #12342 generator: fbd3fabecbd3ca540acf981efd84e66e179dc761.
• Service inputs: the SDK's saved TypeSpec location, pinned to
  Azure/azure-rest-api-specs@1ff3cf500bfd4d8f9195e09fd640a1e6b71161cd,
  under specification/ai-foundry/data-plane/Foundry/src/sdk-python-js-azure-ai-projects.
• Both generators use the same code model emitted by current TypeSpec main,
  the same Azure AI Projects options, and the same installed dependencies
  (TypeSpec compiler 1.16.0 and client-generator-core 0.72.1).
• DPG models, azure.ai.projects, API version v1, no generated tests/samples,
  and generate-typeddict: false.

The shared code model isolates the Python generator changes in #12342 from an
unrelated newer-main emitter naming fix. No handwritten SDK customization,
package version, changelog, or API review artifact update is included in this
comparison diff.

What to review

The generated changes are string-literal quoting and docstring escaping/reflow.
The Projects-specific multiline prose, paragraphs, bullet lists, and JSON code
blocks remain intact. Relevant history: microsoft/typespec#8927,
microsoft/typespec#9466, and #44885.

Azure AI Projects uses DPG mode. That mode does not emit the generated operation
example block whose wrapping is removed by #12342.

Validation

• All 26 generated Python files parse in both variants.
• Executable ASTs match after excluding documentation strings.
• The previous full comparison checked 2,323 runtime class/method docstrings:
  no changed reStructuredText literal blocks or new diagnostic sets.
• Nine Projects-specific full-rendering regression cases pass against both
  generators; the multiline-prose and JSON-block cases reproduce pre-[textanalytics] Raise custom error message for AttributeError on DocumentError #9466 behavior.
• Related generator regression tests: 245 passed.
• Generated Python formatting and focused lint checks are run before commit.

This is a review artifact, not a release or a proposed update to SDK main.

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