fix: marketing site Vercel builds no longer die after ~100 deploys

[t3dotgg]

Problem

Vercel builds of the marketing site started failing in prepare with:

BackupRestoreError: Too many backup files exist (over 100). Please clean up old backups

effect-tsgo patch backs up the real tsgo binary to tsgo.original on every run, and if that name is taken it writes .original.1, .2, ... without ever cleaning up (confirmed the latest 0.24.3 has the same logic, so upgrading doesn't help). CI is fine because Blacksmith runners start fresh, but Vercel restores node_modules from build cache between deploys — so every deploy stacked one more backup until patch hard-failed at 101.

Solution

A tiny scripts/clean-tsgo-backups.mjs (node builtins only) deletes stale tsgo.original* backups, and prepare now runs it before effect-tsgo patch. Deleting them is safe: from the second patch onward the backup is just the previously-patched binary, and pnpm restores the pristine one whenever the package is re-materialized. Verified locally by simulating the cached-rebuild loop — steady state is one backup, no accumulation.

Note: the currently-wedged Vercel project still needs one "Redeploy without build cache" to clear the existing pile; this PR keeps it from re-accumulating.

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Change authored by Claude Fable 5 via Claude Code.

🤖 Generated with Claude Code

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Note

Low Risk
Changes only the prepare hook and a small cleanup script; no runtime app logic, auth, or data paths.

Overview
Vercel marketing builds were failing in prepare once effect-tsgo patch had created more than 100 tsgo.original* backups in cached node_modules.

scripts/clean-tsgo-backups.mjs removes matching backup files under @typescript/native-preview in the pnpm store (node builtins only), and prepare now runs it before effect-tsgo patch so backups do not accumulate across deploys. Existing wedged projects still need one redeploy without build cache to clear the current pile.

^{Reviewed by Cursor Bugbot for commit 555d375. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

Delete stale tsgo backup files before each build to prevent Vercel deploy failures

Adds clean-tsgo-backups.mjs, a script that globs for tsgo backup binaries in node_modules and removes them with rmSync. The prepare script in package.json now runs this cleanup before effect-tsgo patch and vp config, preventing the accumulation of backup files that caused builds to fail after ~100 deploys.

^{Macroscope summarized 555d375.}

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[macroscopeapp]

Approvability

Verdict: Approved 555d375

This PR adds a build-time script to clean up stale tsgo backup files that accumulate in Vercel's cached node_modules. The script only runs during the prepare phase and has no runtime impact—it's a straightforward CI/CD maintenance fix.

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Dismissing prior approval to re-evaluate 555d375