fix(create-objectstack): declare the generator's inputs and its merge disposition

Three gate findings from the first pass, all in the wiring rather than the
mechanism:

- `check:cross-package-test-inputs` — the emission-policy pin names
  `scripts/sync-scaffold-emission-policy.mjs`, so `@objectstack/cli` must declare
  it (with the on-ramp's `bin/` entry and bundled template) or a change to it
  would replay a cached green over the divergence the pin exists to catch.
- `check:merge-driver` — every `gen:` name owes a recorded merge disposition.
  The bundled `package.json` is MIXED: the generator rewrites two values and
  reproduces none of the rest, so it is `NOT_DRIVER_MANAGED` with the reason.
- The same gate counts generator NAMES, so `create-objectstack`'s build calls
  the script directly rather than declaring a second `gen:` alias for it.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YFY46JydE1gMxQG1TqBcMZ

Author: claude

packages/create-objectstack/package.json

@@ -12,8 +12,7 @@
     }
   },
   "scripts": {
-    "build": "pnpm gen:emission-policy && tsup && node ../../scripts/check-dts-emitted.mjs",
-    "gen:emission-policy": "node ../../scripts/sync-scaffold-emission-policy.mjs",
+    "build": "node ../../scripts/sync-scaffold-emission-policy.mjs && tsup && node ../../scripts/check-dts-emitted.mjs",
     "typecheck": "tsc --noEmit",
     "dev": "tsup --watch",
     "test": "vitest run"

scripts/cross-package-test-inputs.mjs

@@ -544,6 +544,12 @@ export const CROSS_PACKAGE_TEST_INPUTS = {
       // same and replays a cached green over it.
       'packages/create-objectstack/bin/create-objectstack.js',
       'packages/create-objectstack/src/templates/blank/package.json',
+      // The generator that ties those two to this package's own constants, and
+      // the third entry of the mention shape on this package — settled the way
+      // check-nul-bytes.mjs above is. It earns the declaration on the merits
+      // too: it is what makes the bundled template equal `SCAFFOLD_*`, so a
+      // change to it changes what that pin measures.
+      'scripts/sync-scaffold-emission-policy.mjs',
       // The two files that hold the COLUMN authority the CLI's migration
       // generators mirror, READ by
       // src/commands/generate-multiple-json-column.pin.test.ts (#14829). That

scripts/regen-artifacts.mjs

@@ -786,6 +786,21 @@ export const NOT_DRIVER_MANAGED = Object.freeze([
       + 'block inside 267 lines of hand-written guide prose. Same generator, same deferral hazard, '
       + 'same answer: guard the block with `check:skill-docs`, leave the prose to text-merge.',
   },
+  {
+    path: 'packages/create-objectstack/src/templates/*/package.json',
+    gen: 'gen:scaffold-emission-policy',
+    owner: ROOT_OWNER,
+    why:
+      'MIXED, and the generated part is TWO VALUES of it. `gen:scaffold-emission-policy` rewrites '
+      + "only `engines.pnpm` and `devDependencies.typescript` from the CLI's shared `SCAFFOLD_*` "
+      + 'constants; everything else in the file — the scripts block, the dependency LIST, and the '
+      + '`@objectstack/*` ranges a different pass (`scripts/sync-template-versions.mjs`) stamps at '
+      + 'version time — is authored or owned elsewhere. So "discard both sides and re-run the '
+      + 'generator" is not even defined here: the generator REFUSES a template that does not '
+      + 'already declare the keys it stamps, and it would reproduce none of the rest. Guarding the '
+      + 'two values with `check:scaffold-emission-policy` is the whole mechanism; a conflict in '
+      + 'this file is a human\'s, exactly as it was before those two values were generated.',
+  },
   {
     path: 'packages/spec/json-schema/**',
     gen: 'gen:openapi',

turbo.json

@@ -137,6 +137,7 @@
         "$TURBO_ROOT$/packages/create-objectstack/src/templates/blank/pnpm-workspace.yaml",
         "$TURBO_ROOT$/packages/create-objectstack/bin/create-objectstack.js",
         "$TURBO_ROOT$/packages/create-objectstack/src/templates/blank/package.json",
+        "$TURBO_ROOT$/scripts/sync-scaffold-emission-policy.mjs",
         "$TURBO_ROOT$/packages/drivers/driver-sql/src/sql-driver.ts",
         "$TURBO_ROOT$/packages/drivers/driver-sql/src/schema-drift.ts",
         "$TURBO_ROOT$/packages/spec/src/data/field.zod.ts"