chore(typescript): bump docs-yml generator to 3.66.1 and regenerate SDK

[FedeZara]

Summary

Follow-up to #15283.

Bumps fern/apis/docs-yml/generators.yml from 3.49.0 to 3.66.1 and
regenerates packages/cli/configuration/src/docs-yml/schemas/sdk/ with
the fixed JsonError/ParseError templates (minification-safe this.name

• new.target.prototype).

⚠️ Do not merge until fernapi/fern-typescript-sdk:3.66.1 is published

The lint CI step runs pnpm update:docs which pulls the generator Docker
image. This PR will fail lint until 3.66.1 is available on Docker Hub
(released automatically after #15283 merges).

Once the image is published, CI should regenerate the files identically to
what is committed here and the drift check will pass.

Test plan

• fernapi/fern-typescript-sdk:3.66.1 is published
• Lint CI passes (drift check produces no diff)

[github-actions]

🌱 Seed Test Selector

Select languages to run seed tests for:

• Python
• TypeScript
• Java
• Go
• Ruby
• C#
• PHP
• Swift
• Rust
• OpenAPI

---

How to use: Click the ⋯ menu above → "Edit" → check the boxes you want → click "Update comment". Tests will run automatically and snapshots will be committed to this PR.

[FedeZara]

• chore(typescript): bump docs-yml generator to 3.66.1 and regenerate SDK #15482 👈 (View in Graphite)
• main

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[claude]

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[github-actions]

SDK Generation Benchmark Results

Comparing PR branch against median of 5 nightly run(s) on main (latest: 2026-04-23T04:59:11Z).

Full benchmark table (click to expand)

Generator	Spec	main (generator)	main (E2E)	PR (generator)	Delta
csharp-sdk	square	56s (n=5)	86s (n=5)	53s	-3s (-5.4%)
go-sdk	square	115s (n=5)	132s (n=5)	118s	+3s (+2.6%)
java-sdk	square	179s (n=5)	207s (n=5)	189s	+10s (+5.6%)
php-sdk	square	43s (n=5)	66s (n=5)	43s	+0s (+0.0%)
python-sdk	square	115s (n=5)	223s (n=5)	117s	+2s (+1.7%)
ruby-sdk-v2	square	130s (n=5)	159s (n=5)	128s	-2s (-1.5%)
rust-sdk	square	166s (n=5)	163s (n=5)	176s	+10s (+6.0%)
swift-sdk	square	41s (n=5)	290s (n=5)	38s	-3s (-7.3%)
ts-sdk	square	74s (n=5)	86s (n=5)	67s	-7s (-9.5%)

main (generator): generator-only time via --skip-scripts (includes Docker image build, container startup, IR parsing, and code generation — this is the same Docker-based flow customers use via fern generate). main (E2E): full customer-observable time including build/test scripts (nightly baseline, informational). Delta is computed against generator-only baseline.
⚠️ = generation exited with a non-zero exit code (timing may not reflect a successful run).
Baseline from nightly runs on main (latest: 2026-04-23T04:59:11Z). Trigger benchmark-baseline to refresh.
Last updated: 2026-04-28 11:38 UTC

[github-actions]

Docs Generation Benchmark Results

Comparing PR branch against median of 5 nightly run(s) on main (latest: 2026-04-23T04:59:11Z).

Fixture	main	PR	Delta
docs	301.0s (n=5)	299.1s (35 versions)	-1.9s (-0.6%)

Docs generation runs fern generate --docs --preview end-to-end against the benchmark fixture with 35 API versions (each version: markdown processing + OpenAPI-to-IR + FDR upload).
Delta is computed against the nightly baseline on main.
Baseline from nightly run(s) on main (latest: 2026-04-23T04:59:11Z). Trigger benchmark-baseline to refresh.
Last updated: 2026-04-28 11:39 UTC