Staging exports pin adapters to a stale `rc` dist-tag → shipped adapter predates published features (breaks ENS)

[pasevin]

Summary

Staging-mode exports pin every @openzeppelin/adapter-* to the npm rc dist-tag, but that tag is stale. It currently resolves to 2.0.0-rc.1 (published 2026-04-03), which predates features later shipped as stable releases — most visibly the ENS / name-resolution featureset (stable 2.1.0→2.3.0). Result: a staging export silently installs a pre-feature adapter and the feature appears broken at runtime, even though the export scaffolding is correct.

Symptom (observed)

A freshly exported app (built-in Ethereum Sepolia, address form), exported in staging mode, shows:

Name resolution is not supported on this network

…when an ENS name is entered — despite ENS being fully wired into the export template (#401) and the UI packages being ENS-capable.

Evidence

Exported package.json (staging signature — UI pkgs stable, adapter on rc):

"@openzeppelin/ui-components": "^3.8.1",   // stable, ENS-capable ✅
"@openzeppelin/ui-react": "^3.3.0",
"@openzeppelin/ui-renderer": "^3.4.0",
"@openzeppelin/adapter-evm": "rc"          // ← resolves to stale 2.0.0-rc.1 ❌

Installed adapter + registry state:

adapter	rc tag →	latest (stable)
adapter-evm	2.0.0-rc.1 (Apr 3)	2.3.0
adapter-solana / -stellar / -midnight	2.0.0-rc.1	2.2.0

• adapter-evm@2.0.0-rc.1 dist contains zero matches for resolveName / ensUniversalResolver — the name-resolution capability simply does not exist in that build, so the runtime reports UNSUPPORTED_NETWORK.
• The ENS feature landed in stable 2.1.0→2.3.0 (July 2026), all via push-to-main stable releases. The RC path (publish.yml workflow_dispatch) was never run for it, so the rc dist-tag never advanced past April.

Root cause

apps/builder/src/export/PackageManager.ts → applyVersioningStrategy, env === 'staging' branch:

// Staging: Use RC versions for testing latest features
if (managedVersion.includes('-rc')) {
  updatedDependencies[pkgName] = managedVersion;
} else {
  // Otherwise fall back to the 'rc' dist-tag ...
  updatedDependencies[pkgName] = 'rc';
}

When versions.ts holds a stable semver (e.g. 2.3.0), staging pins the dependency to the bare 'rc' dist-tag. That is only correct if the rc tag is ≥ latest stable. It isn't — and nothing guarantees it. Any feature merged to stable after the last RC publish is invisible to staging exports, with no error at export time (silent regression surface).

Note: production-mode exports are unaffected — they pin ^<managedVersion> from versions.ts (e.g. ^2.3.0), so they ship ENS correctly.

Proposed fixes (any subset)

1. PackageManager (primary): in the staging branch, only use the rc dist-tag when it is actually newer than the managed stable; otherwise fall back to ^<managedVersion> (i.e. never ship an adapter older than the production pin). Guards against tag lag structurally.
2. Release hygiene: advance the rc dist-tag whenever a stable adapter release goes out (or run the RC workflow_dispatch after stable), so rc never trails latest.
3. Preflight guard: a CI/export check that fails or warns when any @openzeppelin/adapter-* rc tag is older than its latest, so this can't silently recur.

References

• Export ENS wiring: feat(builder): enable full ENS featureset with mainnet L1 fallback #401 (merged)
• ENS featureset completeness in exports: Include ENS support by default in exported apps #406
• apps/builder/src/export/PackageManager.ts (applyVersioningStrategy)