Build: Preapprove Storybook packages for yarn npmMinimalAgeGate in sandboxes

[valentinpalkovic]

Summary

Yarn 4.15.0 enables npmMinimalAgeGate: 1d by default (yarnpkg/berry#7135), which quarantines freshly-published packages from the local Verdaccio registry and breaks sandbox creation:

SB_CLI_0002 (MinimumReleaseAgeHandledError): yarn blocked package installation
because your project uses npmMinimalAgeGate.

Failed package: create-storybook@10.5.0-alpha.0

This PR configures the sandbox yarn install (scripts/utils/yarn.ts → installYarn2) to:

• Tighten the gate to 7 days (10080 minutes) — stricter than yarn's new 1d default for unknown third-party packages.
• Preapprove every Storybook monorepo package (derived dynamically from code/core/src/common/versions.ts) plus the known satellite @chromatic-com/storybook, so freshly-released sandbox packages aren't blocked.

The package list stays in sync as packages are added to or removed from versions.ts.

Test plan

• CI sandbox creation succeeds (lit-vite/default-ts and others that were failing on next)
• Locally: yarn task sandbox --template react-vite/default-ts --start-from auto completes without YN0016
• The generated .yarnrc.yml in the sandbox contains npmMinimalAgeGate: 10080 and npmPreapprovedPackages with the Storybook package list

Summary by CodeRabbit

• Chores
  • Enforced a 7‑day package age gate for sandbox Yarn installs to improve stability.
  • Preapproved an allowlist of Storybook-related packages (including the new vite-plugin-storybook-nextjs) to speed and stabilize sandbox setup, improving reliability of local development and testing.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 1850c45c-b041-4db8-82ad-b706fb6d1818

📥 Commits

Reviewing files that changed from the base of the PR and between 1c785c8 and 8dc993d.

📒 Files selected for processing (2)

• code/core/src/common/satellite-addons.ts
• scripts/utils/yarn.ts

✅ Files skipped from review due to trivial changes (1)

• code/core/src/common/satellite-addons.ts

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📝 Walkthrough

Walkthrough

Adds Yarn 2 sandbox settings: a 7-day npm age gate and a JSON-stringified preapproved package allowlist built from Storybook package keys plus satellite addons; also appends these settings to the install command sequence and adds 'vite-plugin-storybook-nextjs' to the satellite addons list.

Changes

Yarn sandbox package age gate configuration

Layer / File(s)	Summary
Yarn config: import, constants, and command updates scripts/utils/yarn.ts	Adds satelliteAddons import; defines npmMinimalAgeGate (7 days in minutes) and preapprovedNpmPackages (union of storybookVersions keys and satelliteAddons); appends yarn config set npmMinimalAgeGate and yarn config set npmPreapprovedPackages --json '<stringified-list>' to installYarn2's command array.
Add new satellite addon to maintained list code/core/src/common/satellite-addons.ts	Adds 'vite-plugin-storybook-nextjs' to the default exported array of maintained Storybook satellite addons.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Possibly related PRs

• storybookjs/storybook#32551: Also modifies scripts/utils/yarn.ts's installYarn2 workflow (removes .yarnrc.yml before install).
• storybookjs/storybook#33270: Touched scripts/utils/yarn.ts's Yarn 2 installation/sandbox workflow and related messaging.

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