microsoft/typespec

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Stars: 5.9k
Forks: 394
Open beginner issues: 0
Indexed issues: 1k
Avg merge: 1d 23h
Merged PRs (30d): 104

Dominant language: Java
License: MIT
Last GitHub push: Sep 16, 2026
Latest indexed: Sep 17, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: good first issue

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1001 open issues indexed

[Bug]: @typespec/http-client-js generates wrong code for binary response definitions Open

bug emitter:client:js

microsoft/typespec#8438 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Emit profiles Open

compiler:core design:needed triaged:core

microsoft/typespec#8449 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
[TCGC] Support Discriminated Unions in all client emitters Open

emitter:client:all

microsoft/typespec#8455 · 20 comments · 0 reactions · 1 assignee · Indexed Sep 17, 2026
Emit types only and exclude HTTP libraries Open

design:needed emitter:client:all needs-area

microsoft/typespec#8458 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
[http-spector] Question on `withServiceKeys` usage Open

feature spector triaged:core

microsoft/typespec#8460 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Do Not Generate Patch Property for Internal Models Open

emitter:client:csharp

microsoft/typespec#8467 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Consistency between C# client and server emitters Open

design:needed emitter:client:csharp emitter:service:csharp needs-area triaged:core

microsoft/typespec#8478 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Add ability to generate empty client/options Open

emitter:client:csharp

microsoft/typespec#8479 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Xml.name set uncessarly for some nested object Open

emitter:openapi3 feature triaged:core

microsoft/typespec#8487 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
[Bug]: @typespec/http-server-csharp generates JsonObject instead of dictionary types for Record<T> properties Open

bug emitter:service:csharp triaged:core

microsoft/typespec#8488 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 17, 2026
[Bug]: EmitterOptions defaults are not resolved. Open

bug compiler:core triaged:core

microsoft/typespec#8489 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Should encoding define guidance when the serialization would loose precision Open

compiler:core design:needed triaged:core

microsoft/typespec#8494 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 17, 2026
[http-python-client] Paging item generation issue for `application/xml` Open

emitter:client:python

microsoft/typespec#8504 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 17, 2026
[Design]: Support Discriminated Unions in all client emitters Open

emitter:client:all

microsoft/typespec#8510 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Add diagnostic for `@discriminator` applied to a model without the specified discriminator property defined directly Open

compiler:core feature triaged:core

microsoft/typespec#8518 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Proposal: Introduce `interface is` and `interface ...` operators Open

compiler:core design:needed triaged:core

microsoft/typespec#8527 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Write docs on how to use typespec programmatically Open

docs feature mq needs-area triaged:core

microsoft/typespec#8529 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 17, 2026
[Bug]: Difficulty expressing optional type field for tool output submission across versions Open

bug lib:versioning triaged:core

microsoft/typespec#8533 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
[ide] misconfigured emiter in vscode won't be reported in vscode and it will also block the linter rules to run silently Open

ide

microsoft/typespec#8539 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 17, 2026
[Bug]: Confusing and wrong documentation on `is` vs `extend` Open

bug docs mq triaged:core

microsoft/typespec#8541 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
[Bug]: @typespec/http-client-js | TypeError: Cannot use 'in' operator to search for 'decorators' in undefined Open

bug emitter:client:js

microsoft/typespec#8562 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
[http-client-python] pyproject.toml doesn't keep EngSys-specific configs on regen Open

emitter:client:python

microsoft/typespec#8565 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
[Bug]: Http typekits are not exposed and documentation is missing info on how to use Open

docs mq needs-area triaged:core

microsoft/typespec#8575 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
OpenAPI emitter: allow operationId to be set on interfaces and namespaces to act as prefix specification Open

feature lib:openapi triaged:core

microsoft/typespec#8588 · 1 comment · 1 reaction · 0 assignees · Indexed Sep 17, 2026
tspd deduplicate signature types Open

feature mq triaged:core tspd

microsoft/typespec#8604 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
[http-client-python] pyproject.toml - keep non-generated project.urls Open

emitter:client:python

microsoft/typespec#8617 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Importing package that make use of stdout crash language server Open

bug ide

microsoft/typespec#8624 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 17, 2026
`@opExample` custom metadata Open

design:needed needs-area triaged:core

microsoft/typespec#8633 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Consider removing unreferenced-type-handling option Open

emitter:client:csharp

microsoft/typespec#8640 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
[http-client-python] Enum member reference is incorrect in docstring vartype Open

emitter:client:python

microsoft/typespec#8645 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
[python][sphinx] Need to escape '**' in docstring Open

emitter:client:python

microsoft/typespec#8654 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Improve API for SuppressionStatement Open

emitter:client:csharp

microsoft/typespec#8655 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
[Bug]: @typespec/openapi3 Nullable union expression generates invalid openapi3 Open

bug emitter:openapi3 triaged:core

microsoft/typespec#8661 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Add Method Comments for JsonPatch Internal Serialization Methods Open

emitter:client:csharp

microsoft/typespec#8678 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Consider adding DurationKnownEncoding.minutes Open

compiler:core design:accepted design:needed triaged:core

microsoft/typespec#8690 · 2 comments · 1 reaction · 1 assignee · Indexed Sep 17, 2026
Need default descriptions for method parameters Open

emitter:client:csharp

microsoft/typespec#8706 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Investiagate a bit more outdated file loading in playground/lsp Open

ide

microsoft/typespec#8715 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Allow reusing models between `multipart/form-data` and `application/json` operations. Open

design:needed lib:http triaged:core

microsoft/typespec#8725 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Support access decorator at the model property level Open

emitter:client:csharp

microsoft/typespec#8726 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
[python] rewrite preprocess script in typescript Open

emitter:client:python

microsoft/typespec#8740 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Support `self` or `this` for referencing members Open

compiler:core design:needed triaged:core

microsoft/typespec#8765 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Proposal: Allow overriding property from spread Open

compiler:core design:needed triaged:core

microsoft/typespec#8775 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
[http-client-csharp] generated sample files should be treated differently Open

emitter:client:csharp

microsoft/typespec#8815 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
[http-client-csharp] scaffolding does not have an option to write test project files Open

emitter:client:csharp

microsoft/typespec#8817 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
add optional flags argument to pattern decorator Open

compiler:core design:needed needs-area triaged:core

microsoft/typespec#8818 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Apply decorators to the inner type of a `HttpPart` property. Open

compiler:core design:needed needs-area triaged:core

microsoft/typespec#8820 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Add Accept method for ConstructorProvider Open

emitter:client:csharp

microsoft/typespec#8834 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 17, 2026
When update the name of PropertyProvider, we should be able to rename its corresponding ParameterProvider Open

emitter:client:csharp

microsoft/typespec#8837 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
[tests] add a test for using files as input and output Open

lib:http-specs

microsoft/typespec#8842 · 0 comments · 1 reaction · 1 assignee · Indexed Sep 17, 2026
Add guidance around when to use plugins vs config options Open

emitter:client:csharp

microsoft/typespec#8849 · 1 comment · 1 reaction · 1 assignee · Indexed Sep 17, 2026

microsoft/typespec

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