ingesting-spec

Development

Guide for ingesting the latest OpenAI TypeSpec specification into the openai-dotnet SDK. Use this when asked to update or ingest OpenAI API specs, copy base TypeSpec files from upstream, fix client TSP compile errors, or run code generation for new API areas.

QUICK START

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Source SKILL.md: https://github.com/openai/openai-dotnet/blob/HEAD/.github/skills/ingesting-spec/SKILL.md

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Spec Ingestion

Overview

This skill describes how to ingest the latest OpenAI TypeSpec specification (from the upstream microsoft/openai-openapi-pr repository) into the openai-dotnet SDK, area by area.

The process involves:

Copying updated base specs from upstream (exact copy, no modifications)
Reporting any compile errors in the base TSP (do NOT fix — base spec must stay unmodified)
Fixing compile errors in the client TSP layer
Preserving custom C# code (renames, stubs)
Running code generation
Verifying the output

Skill Documents

This skill is split across multiple files for easier navigation:

Document	Description
steps.md	Step-by-step process — the full 9-step workflow from copying spec to post-generation verification
file-locations.md	Key file locations — quick reference for all upstream and local paths, area mappings
patterns-and-gotchas.md	Common patterns & gotchas — lessons learned, pitfalls, and conventions to follow
checklist.md	Checklist — a task-by-task checklist for tracking progress during an ingestion
references.md	Reference PRs — detailed notes on past ingestion PRs with lessons learned

Quick Start

Review references.md for examples of past ingestions in your area
Read file-locations.md to understand the repo layout
Follow steps.md for the full ingestion workflow
Use checklist.md to track your progress
Consult patterns-and-gotchas.md when you hit issues

Available Areas

Areas that can be ingested independently:

administration · assistants · audio · batch · chat · containers · conversations · embeddings · evals · files · fine-tuning · graders · images · models · moderations · realtime · responses · runs · threads · vector-stores · videos

Key Rules

Always add @@clientLocation for every operation in the client TSP (the latest spec no longer uses interface blocks)
NEVER modify the base spec — it must be an exact copy of upstream. Handle all issues (type unions, suppressions, etc.) in specification/client/ instead
Update [CodeGenType] stubs in src/Custom/{Area}/Internal/GeneratorStubs.cs for any renamed types
Defer complex features — suggest them as follow-up items rather than implementing in the same ingestion
Run ./scripts/Invoke-CodeGen.ps1 to generate code (warnings are OK. Errors are not), then dotnet build to verify (Should be no warnings or errors)
Work locally only — do NOT create PRs or file issues. Instead, suggest a list of issues that may need to be filed upstream