release: 0.19.0

[stainless-app]

Automated Release PR

0.19.0 (2026-05-08)

Full Changelog: v0.18.0...v0.19.0

Features

• go: add default http client with timeout (4562f58)
• support setting headers via env (3b6d6cd)

Bug Fixes

• go: avoid panic when http.DefaultTransport is wrapped (90abdb2)

Chores

• avoid embedding reflect.Type for dead code elimination (768a2a1)
• internal: more robust bootstrap script (53ef042)
• redact api-key headers in debug logs (0f70339)

---

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Note

Medium Risk
Medium risk because it changes default HTTP behavior (new client/transport timeout) and adds environment-driven header injection, which can affect request semantics and debugging/logging output.

Overview
Bumps the SDK release to 0.19.0 (manifest/version constants, README pin, changelog, and spec URL).

Adds a default http.Client that clones http.DefaultTransport when possible to apply a ResponseHeaderTimeout, and wires it into DefaultClientOptions().

Extends env-based configuration to support HYPEMAN_CUSTOM_HEADERS (newline-delimited Header: value entries) and updates debug logging to redact sensitive headers (auth/api-key/cookies) when dumping requests/responses.

Refactors internal encoder/decoder cache keys to store reflect.Type in a named field (avoiding embedded reflect.Type) and makes the bootstrap script more robust to unset SKIP_BREW.

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[firetiger-agent]

Firetiger deploy monitoring skipped

This PR didn't match the auto-monitor filter configured on your GitHub connection:

Any PR that changes the kernel API. Monitor changes to API endpoints (packages/api/cmd/api/) and Temporal workflows (packages/api/lib/temporal) in the kernel repo

Reason: This is an automated release PR with only internal/chore changes to a bootstrap script, not a change to kernel API endpoints or Temporal workflows.

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[stainless-app]

🧪 Testing

To try out this version of the SDK:

Download and unzip: 'https://pkg.stainless.com/s/hypeman-go/90abdb2fe804de224236e5a0556b5675afb49c09/source.zip'. Run 'go mod edit -replace github.com/kernel/hypeman-go=/path/to/unzipped_directory'.

Expires at: Sun, 07 Jun 2026 05:22:38 GMT
Updated at: Fri, 08 May 2026 05:22:38 GMT

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

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^{Reviewed by Cursor Bugbot for commit b9f3593. Configure here.}