build: patch tsup's bundled rollup-plugin-dts so one ts.Program covers every DTS entry

tsup 8.5.1 bundles rollup-plugin-dts 6.1.1. Its createPrograms keys each
entry by a directory, and on the tsconfig-override path tsup always takes,
a config-cache hit kept the entry's own directory. So every DTS entry got
its own ts.Program. That affects 12 packages here; spec's 18 entries built
18 programs. The patch keys every entry by the tsconfig's directory.

Written with pnpm patch-commit; patchedDependencies lives in
pnpm-workspace.yaml; the lockfile was regenerated by pnpm install.

Co-authored-by: Claude <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014EJ1ED8X4MMrT18BhVx4tx

Author: claude

patches/tsup@8.5.1.patch

@@ -0,0 +1,16 @@
+diff --git a/dist/rollup.js b/dist/rollup.js
+index e128b61b9558318b9f86dc11d72c31f09a8eb7db..35f85e39c2af6c645fb2d3da115742df445d2343 100644
+--- a/dist/rollup.js
++++ b/dist/rollup.js
+@@ -4915,6 +4915,11 @@ var require_rollup_plugin_dts = _chunkTWFEYLU4js.__commonJS.call(void 0, {
+       } else {
+         logCache("HIT", cacheKey);
+       }
++      if (overrideConfigPath) {
++        // objectstack patch: a cache HIT kept dirname(input), so each entry
++        // got its own ts.Program. One tsconfig for all entries => one key.
++        dirName = path__namespace.dirname(path__namespace.resolve(process.cwd(), overrideConfigPath));
++      }
+       const { fileNames, options, errors } = configByPath.get(cacheKey);
+       dtsFiles = fileNames.filter((name) => DTS_EXTENSIONS.test(name));
+       if (errors.length) {

pnpm-lock.yaml

@@ -18,6 +18,24 @@ onlyBuiltDependencies:
   - msw
   - sharp
 
+# Patched dependencies. Written with `pnpm patch` / `pnpm patch-commit`, never
+# by hand. `patch-commit` writes this key into package.json's `pnpm` field;
+# move it here, the file that holds every other pnpm setting, then run
+# `pnpm install`.
+#   - tsup@8.5.1: its bundled rollup-plugin-dts gave every DTS entry its own
+#     ts.Program. tsup always passes the tsconfig path, and on that path a
+#     config-cache hit keyed each later entry by its own directory. The patch
+#     keys every entry by the tsconfig's directory, so all entries share one
+#     program. The same code is in rollup-plugin-dts 6.5.1. Measured on
+#     @objectstack/spec's 18 entries: live heap 4997 → 1405 MB. The emitted
+#     declarations are the same types in every affected package.
+#     The key names the exact version. A tsup that resolves to anything else
+#     leaves the patch unused, and `pnpm install` then fails
+#     (ERR_PNPM_UNUSED_PATCH), so an upgrade cannot drop the patch silently.
+#     Re-derive the patch, or retire it, on every tsup bump.
+patchedDependencies:
+  tsup@8.5.1: patches/tsup@8.5.1.patch
+
 # Transitive-dependency version pins. pnpm v10 reads `overrides` from THIS file
 # — the `pnpm.overrides` block in package.json is silently ignored — so all
 # pins must live here (previously orphaned in package.json: minimatch, tar).