fix(release): rewrite preview peer ranges via --peerDeps so npm installs matched pkg.pr.new pairs cleanly

[ScriptedAlchemy]

Summary

Installing both pkg.pr.new previews with npm hard-fails with ERESOLVE: previews are versioned 0.0.0-preview-<sha>, which does not satisfy the agent-bundle@^0.1.0 peer range that @agent-bundle/rsc-runtime ships even in its preview tarball. This lands direction 1 from the issue: add --peerDeps to preview:publish.

Per the pinned pkg-pr-new@0.0.88 source, --previewVersion alone only rewrites the version field — its help text claims cross-package peerDependencies are updated to match, but peer rewriting (hijackDeps(realDeps, pJson.peerDependencies)) only runs when --peerDeps is set, which is what builds the realDeps map. With both flags, the preview tarball's agent-bundle peer range becomes the exact 0.0.0-preview-<sha> of the same run, so a matched pair installs cleanly with stock npm, and a mixed-sha pair now fails loudly instead of being silently accepted. Preview tarballs only; the manifests destined for npm are untouched (writeDeps restores the source package.json after packing).

Verification

Smoke-tested against this PR's own preview publish: plain npm install (no --legacy-peer-deps) of both preview URLs into a clean temp project, then import both entrypoints. Results in the PR conversation.

Closes #45

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Latest commit: 3db7cf3

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[chatgpt-codex-connector]

Codex Review Summary

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-08-30T03:05:33.971453Z	66f29fc	PR opened

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[pkg-pr-new]

npm i https://pkg.pr.new/ScriptedAlchemy/agent-bundle@46

npm i https://pkg.pr.new/ScriptedAlchemy/agent-bundle/@agent-bundle/rsc-runtime@46

commit: 3db7cf3