Stainless

Stainless shipped several platform-level capabilities over the past 90 days, with notable momentum around CLI tooling, developer-facing docs, and AI-assisted workflows.

The CLI generator reached general availability, turning APIs into high-quality command-line tools. Follow-on improvements added binary endpoint downloads — generated CLIs now handle file-downloading endpoints with --output/-o flags and smart filename selection. The stl skills command also shipped, installing Stainless CLI skills into agent contexts (Claude Code, Codex, Gemini) with auto-detection for .agents/ vs .claude/ project layouts.

Stainless Docs Platform entered public beta for all new and existing projects, giving teams a managed documentation layer alongside their generated SDKs.

SDK generation picked up several targeted improvements. Per-endpoint security support fixed a bug where SDKs sent both api-key and Authorization headers simultaneously, causing auth errors against APIs with multiple schemes. A new omit_stainless_headers config flag removes X-Stainless-* headers from generated SDKs entirely. Python SDK builds gained PyPI trusted publishing via OIDC alongside existing API token support. Java builds added staging Maven repos, surfaced through the Studio build status panel.

AI-generated commit messages launched in opt-in form — Stainless now auto-generates Conventional Commits-formatted messages for each SDK build. GitHub release asset uploads also shipped, enabling bundled artifacts and documentation files to be attached to tagged releases.