diff --git a/gitnexus/package.json b/gitnexus/package.json
index e68054a52..3ab737638 100644
--- a/gitnexus/package.json
+++ b/gitnexus/package.json
@@ -49,7 +49,7 @@
     "test:watch": "vitest",
     "test:coverage": "vitest run --coverage",
     "test:cross-platform": "tsx scripts/run-cross-platform.ts",
-    "postinstall": "node scripts/materialize-vendor-grammars.cjs && node scripts/build-tree-sitter-c.cjs && node scripts/build-tree-sitter-dart.cjs && node scripts/build-tree-sitter-proto.cjs && node scripts/build-tree-sitter-swift.cjs && node scripts/build-tree-sitter-kotlin.cjs",
+    "postinstall": "node scripts/materialize-vendor-grammars.cjs && node scripts/build-tree-sitter-grammars.cjs",
     "assert-publish-coverage": "node scripts/assert-publish-grammar-coverage.cjs",
     "prepare": "node scripts/build.js",
     "prepack": "node scripts/assert-publish-grammar-coverage.cjs && node scripts/build.js"
diff --git a/gitnexus/scripts/build-tree-sitter-c.cjs b/gitnexus/scripts/build-tree-sitter-c.cjs
deleted file mode 100644
index 64d3df7bd..000000000
--- a/gitnexus/scripts/build-tree-sitter-c.cjs
+++ /dev/null
@@ -1,61 +0,0 @@
-#!/usr/bin/env node
-/**
- * Activate the tree-sitter-c native binding after materialize-vendor-grammars.cjs.
- *
- * tree-sitter-c is a REQUIRED grammar, vendored at 0.21.4 for ABI compatibility
- * with the bundled tree-sitter@0.21.1 runtime (#1242). It is vendored — not left
- * a plain npm dependency — because upstream ships prebuilds for only 4 of 6
- * platform-archs (#2116), and a required dep with no matching prebuild
- * hard-fails `npm install` on toolchain-less ARM before any gitnexus script runs.
- *
- * Resolution order: prefer a committed prebuild (toolchain-free, the goal once
- * the build-tree-sitter-prebuilds workflow has populated all six); otherwise
- * build from the vendored source (binding.gyp + src/) so C parsing still works
- * on any host with a toolchain — e.g. CI, where the prebuilds may not yet be
- * vendored. No GITNEXUS_SKIP gate: C is required, not a user-opt-out grammar.
- */
-const fs = require('fs');
-const path = require('path');
-const { execSync } = require('child_process');
-
-const cDir = path.join(__dirname, '..', 'node_modules', 'tree-sitter-c');
-const bindingGyp = path.join(cDir, 'binding.gyp');
-const bindingNode = path.join(cDir, 'build', 'Release', 'tree_sitter_c_binding.node');
-
-try {
-  if (!fs.existsSync(bindingGyp) || fs.existsSync(bindingNode)) {
-    process.exit(0);
-  }
-
-  // Prefer a committed prebuild for this platform-arch (no toolchain needed).
-  try {
-    require('node-gyp-build').path(cDir);
-    process.exit(0);
-  } catch {
-    // No matching prebuild — fall through to the source build below.
-  }
-
-  try {
-    require.resolve('node-addon-api');
-    require.resolve('node-gyp-build');
-  } catch (resolveErr) {
-    console.warn(
-      '[tree-sitter-c] Skipping build: hoisted build deps not resolvable (%s).',
-      resolveErr.message,
-    );
-    console.warn(
-      '[tree-sitter-c] C parsing will be unavailable until a prebuild or toolchain is present.',
-    );
-    process.exit(0);
-  }
-
-  console.log(
-    '[tree-sitter-c] No prebuild for this platform — building native binding from source...',
-  );
-  execSync('npx node-gyp rebuild', { cwd: cDir, stdio: 'pipe', timeout: 180000 });
-  console.log('[tree-sitter-c] Native binding built successfully');
-} catch (err) {
-  console.warn('[tree-sitter-c] Could not build native binding:', err.message);
-  console.warn('[tree-sitter-c] C parsing will be unavailable. Other languages are unaffected.');
-  process.exit(0);
-}
diff --git a/gitnexus/scripts/build-tree-sitter-dart.cjs b/gitnexus/scripts/build-tree-sitter-dart.cjs
deleted file mode 100644
index a34ca8e92..000000000
--- a/gitnexus/scripts/build-tree-sitter-dart.cjs
+++ /dev/null
@@ -1,68 +0,0 @@
-#!/usr/bin/env node
-/**
- * Build tree-sitter-dart native binding in node_modules/ after materialize-vendor-grammars.cjs.
- * Vendored source lives in vendor/ only; see #836 and #1728.
- */
-const fs = require('fs');
-const path = require('path');
-const { execSync } = require('child_process');
-
-// Opt-out: skip the native rebuild entirely. Dart parsing becomes
-// unavailable but `npm install gitnexus` finishes much faster on machines
-// without a C++ toolchain. Strict `=== '1'` only — '=true', '=yes', '=0'
-// (read as a string), and any other value all fall through to the rebuild.
-if (process.env.GITNEXUS_SKIP_OPTIONAL_GRAMMARS === '1') {
-  console.warn(
-    '[tree-sitter-dart] Skipping build (GITNEXUS_SKIP_OPTIONAL_GRAMMARS=1). Dart parsing will be unavailable until reinstalled without the env var.',
-  );
-  process.exit(0);
-}
-
-const dartDir = path.join(__dirname, '..', 'node_modules', 'tree-sitter-dart');
-const bindingGyp = path.join(dartDir, 'binding.gyp');
-const bindingNode = path.join(dartDir, 'build', 'Release', 'tree_sitter_dart_binding.node');
-
-try {
-  if (!fs.existsSync(bindingGyp) || fs.existsSync(bindingNode)) {
-    process.exit(0);
-  }
-
-  // Prefer a committed prebuild (toolchain-free). If node-gyp-build resolves a
-  // binary for this platform-arch under prebuilds/, no source build is needed.
-  // Before any prebuilds are vendored this throws and we fall through to the
-  // source build below — no behavior change.
-  try {
-    require('node-gyp-build').path(dartDir);
-    process.exit(0);
-  } catch {
-    // No matching prebuild for this host — fall through to the source build.
-  }
-
-  try {
-    require.resolve('node-addon-api');
-    require.resolve('node-gyp-build');
-  } catch (resolveErr) {
-    console.warn(
-      '[tree-sitter-dart] Skipping build: hoisted build deps not resolvable (%s).',
-      resolveErr.message,
-    );
-    console.warn(
-      '[tree-sitter-dart] Dart parsing will be unavailable. Install without --no-optional and with scripts enabled to build.',
-    );
-    process.exit(0);
-  }
-
-  console.log('[tree-sitter-dart] Building native binding...');
-  execSync('npx node-gyp rebuild', {
-    cwd: dartDir,
-    stdio: 'pipe',
-    timeout: 180000,
-  });
-  console.log('[tree-sitter-dart] Native binding built successfully');
-} catch (err) {
-  console.warn('[tree-sitter-dart] Could not build native binding:', err.message);
-  console.warn(
-    '[tree-sitter-dart] Dart parsing will be unavailable. Non-Dart functionality is unaffected.',
-  );
-  process.exit(0);
-}
diff --git a/gitnexus/scripts/build-tree-sitter-grammars.cjs b/gitnexus/scripts/build-tree-sitter-grammars.cjs
new file mode 100644
index 000000000..dd3d219e4
--- /dev/null
+++ b/gitnexus/scripts/build-tree-sitter-grammars.cjs
@@ -0,0 +1,120 @@
+#!/usr/bin/env node
+/**
+ * Activate the vendored tree-sitter native bindings after
+ * materialize-vendor-grammars.cjs. One registry-driven script replaces the
+ * former per-grammar build-tree-sitter-<name>.cjs files (they were ~95%
+ * identical).
+ *
+ * For each grammar the resolution order is identical:
+ *   1. If the package isn't materialized (no binding.gyp) or the binding is
+ *      already built, do nothing.
+ *   2. Prefer a committed prebuild for this platform-arch (toolchain-free) via
+ *      node-gyp-build — the goal once build-tree-sitter-prebuilds.yml has
+ *      populated all six tuples.
+ *   3. Otherwise source-build from the vendored grammar source (binding.gyp +
+ *      src/) so parsing still works on any toolchain host — e.g. CI, before the
+ *      prebuilds land.
+ *
+ * HARD INVARIANT: this runs in `gitnexus`'s postinstall, so it MUST NEVER throw
+ * or exit non-zero — a failure for any single grammar must not break the install.
+ *
+ * Opt-out: GITNEXUS_SKIP_OPTIONAL_GRAMMARS=1 (strict '1') skips the OPTIONAL
+ * grammars only. tree-sitter-c is REQUIRED (it backstops upstream's 4/6 ARM
+ * prebuild gap, #2116) and is always built.
+ *
+ * Usage:
+ *   node build-tree-sitter-grammars.cjs            # all grammars (postinstall)
+ *   node build-tree-sitter-grammars.cjs swift c    # only the named grammars
+ */
+const fs = require('fs');
+const path = require('path');
+const { execSync } = require('child_process');
+
+// Registry. `display`/`ext` drive the human-readable warnings; `required`
+// grammars ignore the opt-out gate. Insertion order == build order (c first).
+const GRAMMARS = {
+  c: { required: true, display: 'C', ext: '.c' },
+  dart: { required: false, display: 'Dart', ext: '.dart' },
+  proto: { required: false, display: 'Proto', ext: '.proto' },
+  swift: { required: false, display: 'Swift', ext: '.swift' },
+  kotlin: { required: false, display: 'Kotlin', ext: '.kt/.kts' },
+};
+
+const skipOptional = process.env.GITNEXUS_SKIP_OPTIONAL_GRAMMARS === '1';
+
+function buildGrammar(short) {
+  const cfg = GRAMMARS[short];
+  const tag = `[tree-sitter-${short}]`;
+
+  if (!cfg.required && skipOptional) {
+    console.warn(
+      `${tag} Skipping build (GITNEXUS_SKIP_OPTIONAL_GRAMMARS=1). ${cfg.display} parsing will be unavailable until reinstalled without the env var.`,
+    );
+    return;
+  }
+
+  const dir = path.join(__dirname, '..', 'node_modules', `tree-sitter-${short}`);
+  const bindingGyp = path.join(dir, 'binding.gyp');
+  const bindingNode = path.join(dir, 'build', 'Release', `tree_sitter_${short}_binding.node`);
+
+  try {
+    // Not materialized (no source), or already built — nothing to do.
+    if (!fs.existsSync(bindingGyp) || fs.existsSync(bindingNode)) {
+      return;
+    }
+
+    // Prefer a committed prebuild for this platform-arch (no toolchain needed).
+    try {
+      require('node-gyp-build').path(dir);
+      return;
+    } catch {
+      // No matching prebuild — fall through to the source build below.
+    }
+
+    // The hoisted build deps must be resolvable to source-build.
+    try {
+      require.resolve('node-addon-api');
+      require.resolve('node-gyp-build');
+    } catch (resolveErr) {
+      console.warn(
+        `${tag} Skipping build: hoisted build deps not resolvable (${resolveErr.message}).`,
+      );
+      console.warn(
+        `${tag} ${cfg.display} parsing will be unavailable until a prebuild or toolchain is present.`,
+      );
+      return;
+    }
+
+    console.log(`${tag} No prebuild for this platform — building native binding from source...`);
+    execSync('npx node-gyp rebuild', { cwd: dir, stdio: 'pipe', timeout: 180000 });
+    console.log(`${tag} Native binding built successfully`);
+  } catch (err) {
+    console.warn(`${tag} Could not build native binding:`, err.message);
+    console.warn(
+      `${tag} ${cfg.display} (${cfg.ext}) parsing will be unavailable. Non-${cfg.display} functionality is unaffected.`,
+    );
+  }
+}
+
+function main() {
+  const args = process.argv.slice(2).filter(Boolean);
+  const targets = args.length > 0 ? args : Object.keys(GRAMMARS);
+  for (const short of targets) {
+    if (!GRAMMARS[short]) {
+      console.warn(`[tree-sitter] Unknown grammar '${short}' — skipping.`);
+      continue;
+    }
+    // Defensive: never let an unexpected throw escape and fail the install.
+    try {
+      buildGrammar(short);
+    } catch (err) {
+      console.warn(`[tree-sitter-${short}] Unexpected build error (ignored): ${err.message}`);
+    }
+  }
+  // Hard guarantee: postinstall must never exit non-zero.
+  process.exit(0);
+}
+
+if (require.main === module) main();
+
+module.exports = { GRAMMARS, buildGrammar };
diff --git a/gitnexus/scripts/build-tree-sitter-kotlin.cjs b/gitnexus/scripts/build-tree-sitter-kotlin.cjs
deleted file mode 100644
index e2aeb1c82..000000000
--- a/gitnexus/scripts/build-tree-sitter-kotlin.cjs
+++ /dev/null
@@ -1,69 +0,0 @@
-#!/usr/bin/env node
-/**
- * Activate the tree-sitter-kotlin native binding after materialize-vendor-grammars.cjs.
- *
- * Kotlin is vendored (upstream ships source only; GitNexus cross-builds the
- * prebuilds via .github/workflows/build-tree-sitter-prebuilds.yml). Resolution
- * order, mirroring Dart/Proto/C: prefer a committed prebuild for this
- * platform-arch (toolchain-free); otherwise build from the vendored source so
- * Kotlin parsing still works on any host with a toolchain — e.g. CI, where the
- * prebuilds may not yet be vendored.
- *
- * MUST NEVER throw or exit non-zero — it must never break `gitnexus` install.
- */
-const fs = require('fs');
-const path = require('path');
-const { execSync } = require('child_process');
-
-// Opt-out: Kotlin is optional, so the env var skips its build entirely (also
-// skipped at materialize). Strict `=== '1'` only.
-if (process.env.GITNEXUS_SKIP_OPTIONAL_GRAMMARS === '1') {
-  console.warn(
-    '[tree-sitter-kotlin] Skipping build (GITNEXUS_SKIP_OPTIONAL_GRAMMARS=1). Kotlin parsing will be unavailable until reinstalled without the env var.',
-  );
-  process.exit(0);
-}
-
-const kotlinDir = path.join(__dirname, '..', 'node_modules', 'tree-sitter-kotlin');
-const bindingGyp = path.join(kotlinDir, 'binding.gyp');
-const bindingNode = path.join(kotlinDir, 'build', 'Release', 'tree_sitter_kotlin_binding.node');
-
-try {
-  if (!fs.existsSync(bindingGyp) || fs.existsSync(bindingNode)) {
-    process.exit(0);
-  }
-
-  // Prefer a committed prebuild for this platform-arch (no toolchain needed).
-  try {
-    require('node-gyp-build').path(kotlinDir);
-    process.exit(0);
-  } catch {
-    // No matching prebuild — fall through to the source build below.
-  }
-
-  try {
-    require.resolve('node-addon-api');
-    require.resolve('node-gyp-build');
-  } catch (resolveErr) {
-    console.warn(
-      '[tree-sitter-kotlin] Skipping build: hoisted build deps not resolvable (%s).',
-      resolveErr.message,
-    );
-    console.warn(
-      '[tree-sitter-kotlin] Kotlin parsing will be unavailable until a prebuild or toolchain is present.',
-    );
-    process.exit(0);
-  }
-
-  console.log(
-    '[tree-sitter-kotlin] No prebuild for this platform — building native binding from source...',
-  );
-  execSync('npx node-gyp rebuild', { cwd: kotlinDir, stdio: 'pipe', timeout: 180000 });
-  console.log('[tree-sitter-kotlin] Native binding built successfully');
-} catch (err) {
-  console.warn('[tree-sitter-kotlin] Could not build native binding:', err.message);
-  console.warn(
-    '[tree-sitter-kotlin] Kotlin (.kt/.kts) parsing will be unavailable. Non-Kotlin functionality is unaffected.',
-  );
-  process.exit(0);
-}
diff --git a/gitnexus/scripts/build-tree-sitter-proto.cjs b/gitnexus/scripts/build-tree-sitter-proto.cjs
deleted file mode 100644
index 3d425e217..000000000
--- a/gitnexus/scripts/build-tree-sitter-proto.cjs
+++ /dev/null
@@ -1,103 +0,0 @@
-#!/usr/bin/env node
-/**
- * Build tree-sitter-proto native binding.
- *
- * Why this script exists:
- *   tree-sitter-proto is vendored under gitnexus/vendor/tree-sitter-proto/
- *   and copied into node_modules/ by materialize-vendor-grammars.cjs. Previously, the vendored
- *   package had its own `dependencies` and `install` script, which caused
- *   npm to create `vendor/tree-sitter-proto/node_modules/` and
- *   `vendor/tree-sitter-proto/build/` during install. Those directories
- *   blocked `rmdir` on global-install upgrade, producing:
- *
- *     ENOTEMPTY: directory not empty, rmdir
- *       '.../gitnexus/vendor/tree-sitter-proto/node_modules/node-addon-api'
- *
- *   (See https://github.com/abhigyanpatwari/GitNexus/issues/836.)
- *
- *   We stripped `dependencies` and the `install` script from the vendored
- *   package.json, hoisted `node-addon-api` and `node-gyp-build` into
- *   gitnexus's own optionalDependencies, and moved native compilation here.
- *
- * What this does:
- *   Runs `npx node-gyp rebuild` inside `node_modules/tree-sitter-proto/`.
- *   Build output lands in
- *   `node_modules/tree-sitter-proto/build/Release/tree_sitter_proto_binding.node`
- *   — under npm-managed territory, safe on upgrade.
- *
- *   Mirrors the tree-sitter-dart build helper. Best-effort: if any
- *   precondition fails (optional dep absent, no toolchain, --ignore-scripts),
- *   warn and exit 0 so gitnexus install still succeeds.
- */
-const fs = require('fs');
-const path = require('path');
-const { execSync } = require('child_process');
-
-// Opt-out: skip the native rebuild entirely. Proto parsing becomes
-// unavailable but `npm install gitnexus` finishes much faster on machines
-// without a C++ toolchain. Strict `=== '1'` only — '=true', '=yes', '=0'
-// (read as a string), and any other value all fall through to the rebuild.
-if (process.env.GITNEXUS_SKIP_OPTIONAL_GRAMMARS === '1') {
-  console.warn(
-    '[tree-sitter-proto] Skipping build (GITNEXUS_SKIP_OPTIONAL_GRAMMARS=1). Proto parsing will be unavailable until reinstalled without the env var.',
-  );
-  process.exit(0);
-}
-
-const protoDir = path.join(__dirname, '..', 'node_modules', 'tree-sitter-proto');
-const bindingGyp = path.join(protoDir, 'binding.gyp');
-const bindingNode = path.join(protoDir, 'build', 'Release', 'tree_sitter_proto_binding.node');
-
-try {
-  if (!fs.existsSync(bindingGyp)) {
-    // tree-sitter-proto is an optionalDependency; absent when install
-    // skipped optional deps or the file: dep was not resolved.
-    process.exit(0);
-  }
-
-  // Skip if the native binding already exists (idempotent re-run).
-  if (fs.existsSync(bindingNode)) {
-    process.exit(0);
-  }
-
-  // Prefer a committed prebuild (toolchain-free). If node-gyp-build resolves a
-  // binary for this platform-arch under prebuilds/, no source build is needed.
-  // Before any prebuilds are vendored this throws and we fall through to the
-  // source build below — no behavior change.
-  try {
-    require('node-gyp-build').path(protoDir);
-    process.exit(0);
-  } catch {
-    // No matching prebuild for this host — fall through to the source build.
-  }
-
-  // Pre-flight: the hoisted build deps must be resolvable.
-  try {
-    require.resolve('node-addon-api');
-    require.resolve('node-gyp-build');
-  } catch (resolveErr) {
-    console.warn(
-      '[tree-sitter-proto] Skipping build: hoisted build deps not resolvable (%s).',
-      resolveErr.message,
-    );
-    console.warn(
-      '[tree-sitter-proto] Proto parsing will be unavailable. Install without --no-optional and with scripts enabled to build.',
-    );
-    process.exit(0);
-  }
-
-  console.log('[tree-sitter-proto] Building native binding...');
-  execSync('npx node-gyp rebuild', {
-    cwd: protoDir,
-    stdio: 'pipe',
-    timeout: 180000,
-  });
-  console.log('[tree-sitter-proto] Native binding built successfully');
-} catch (err) {
-  console.warn('[tree-sitter-proto] Could not build native binding:', err.message);
-  console.warn(
-    '[tree-sitter-proto] Proto (.proto) parsing will be unavailable. Non-proto gitnexus functionality is unaffected.',
-  );
-  // Exit 0: optionalDependency failures must not fail the gitnexus install.
-  process.exit(0);
-}
diff --git a/gitnexus/scripts/build-tree-sitter-swift.cjs b/gitnexus/scripts/build-tree-sitter-swift.cjs
deleted file mode 100644
index 2228826fa..000000000
--- a/gitnexus/scripts/build-tree-sitter-swift.cjs
+++ /dev/null
@@ -1,71 +0,0 @@
-#!/usr/bin/env node
-/**
- * Activate the tree-sitter-swift native binding after materialize-vendor-grammars.cjs.
- *
- * Swift is vendored. Unlike its historical prebuild-only form, the grammar
- * source (parser.c/scanner.c/binding.gyp + src/) is now ALSO vendored, so this
- * script mirrors Dart/Proto/Kotlin/C exactly: prefer a committed prebuild for
- * this platform-arch (toolchain-free); otherwise build from the vendored source
- * so Swift parsing still works on any host with a toolchain — e.g. CI, where the
- * GitNexus-cross-built prebuilds may not yet be vendored. The committed
- * prebuilds for every platform-arch are produced by
- * .github/workflows/build-tree-sitter-prebuilds.yml.
- *
- * MUST NEVER throw or exit non-zero — it must never break `gitnexus` install.
- */
-const fs = require('fs');
-const path = require('path');
-const { execSync } = require('child_process');
-
-// Opt-out: Swift is optional, so the env var skips its build entirely (also
-// skipped at materialize). Strict `=== '1'` only.
-if (process.env.GITNEXUS_SKIP_OPTIONAL_GRAMMARS === '1') {
-  console.warn(
-    '[tree-sitter-swift] Skipping build (GITNEXUS_SKIP_OPTIONAL_GRAMMARS=1). Swift parsing will be unavailable until reinstalled without the env var.',
-  );
-  process.exit(0);
-}
-
-const swiftDir = path.join(__dirname, '..', 'node_modules', 'tree-sitter-swift');
-const bindingGyp = path.join(swiftDir, 'binding.gyp');
-const bindingNode = path.join(swiftDir, 'build', 'Release', 'tree_sitter_swift_binding.node');
-
-try {
-  if (!fs.existsSync(bindingGyp) || fs.existsSync(bindingNode)) {
-    process.exit(0);
-  }
-
-  // Prefer a committed prebuild for this platform-arch (no toolchain needed).
-  try {
-    require('node-gyp-build').path(swiftDir);
-    process.exit(0);
-  } catch {
-    // No matching prebuild — fall through to the source build below.
-  }
-
-  try {
-    require.resolve('node-addon-api');
-    require.resolve('node-gyp-build');
-  } catch (resolveErr) {
-    console.warn(
-      '[tree-sitter-swift] Skipping build: hoisted build deps not resolvable (%s).',
-      resolveErr.message,
-    );
-    console.warn(
-      '[tree-sitter-swift] Swift parsing will be unavailable until a prebuild or toolchain is present.',
-    );
-    process.exit(0);
-  }
-
-  console.log(
-    '[tree-sitter-swift] No prebuild for this platform — building native binding from source...',
-  );
-  execSync('npx node-gyp rebuild', { cwd: swiftDir, stdio: 'pipe', timeout: 180000 });
-  console.log('[tree-sitter-swift] Native binding built successfully');
-} catch (err) {
-  console.warn('[tree-sitter-swift] Could not build native binding:', err.message);
-  console.warn(
-    '[tree-sitter-swift] Swift (.swift) parsing will be unavailable. Non-Swift functionality is unaffected.',
-  );
-  process.exit(0);
-}
diff --git a/gitnexus/test/unit/build-tree-sitter-grammars-probe.test.ts b/gitnexus/test/unit/build-tree-sitter-grammars-probe.test.ts
new file mode 100644
index 000000000..6b05f53b6
--- /dev/null
+++ b/gitnexus/test/unit/build-tree-sitter-grammars-probe.test.ts
@@ -0,0 +1,125 @@
+import { describe, it, expect, beforeAll, afterAll } from 'vitest';
+import { spawnSync } from 'node:child_process';
+import { mkdtempSync, mkdirSync, writeFileSync, readFileSync, rmSync } from 'node:fs';
+import { tmpdir } from 'node:os';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+/**
+ * Behavioral coverage for the consolidated activation script
+ * `scripts/build-tree-sitter-grammars.cjs` (replaces the per-grammar
+ * build-tree-sitter-<name>.cjs files).
+ *
+ * For each grammar it prefers a committed prebuild (toolchain-free); if none
+ * matches it source-builds from the vendored source. Its hard invariant is that
+ * it MUST NEVER exit non-zero — it runs in `gitnexus`'s postinstall, so a
+ * non-zero exit would break `npm install gitnexus`. This suite runs the real
+ * script bytes (targeting one grammar via the CLI arg) across its branches and
+ * asserts exit code 0 every time, plus the required-vs-optional opt-out split.
+ *
+ * The script is copied into an isolated temp `scripts/` dir so its
+ * `__dirname`-relative `../node_modules/tree-sitter-<name>` resolves under our
+ * control. The temp dir has no reachable `node-gyp-build` / `node-addon-api`, so
+ * the source-build path stops at the "hoisted build deps not resolvable" guard
+ * (still exit 0) instead of invoking a real compile.
+ */
+
+const scriptSource = readFileSync(
+  fileURLToPath(new URL('../../scripts/build-tree-sitter-grammars.cjs', import.meta.url)),
+  'utf8',
+);
+
+let tmpRoot: string;
+let scriptPath: string;
+
+beforeAll(() => {
+  tmpRoot = mkdtempSync(path.join(tmpdir(), 'gn-grammars-build-'));
+  mkdirSync(path.join(tmpRoot, 'scripts'), { recursive: true });
+  scriptPath = path.join(tmpRoot, 'scripts', 'build-tree-sitter-grammars.cjs');
+  writeFileSync(scriptPath, scriptSource);
+});
+
+afterAll(() => {
+  rmSync(tmpRoot, { recursive: true, force: true });
+});
+
+function runBuild(grammar: string, overrides: Record<string, string | undefined>) {
+  const env: Record<string, string> = {};
+  for (const [k, v] of Object.entries(process.env)) {
+    if (v !== undefined) env[k] = v;
+  }
+  delete env.GITNEXUS_SKIP_OPTIONAL_GRAMMARS;
+  for (const [k, v] of Object.entries(overrides)) {
+    if (v === undefined) delete env[k];
+    else env[k] = v;
+  }
+  return spawnSync(process.execPath, [scriptPath, grammar], {
+    env,
+    encoding: 'utf8',
+    timeout: 30_000,
+  });
+}
+
+function materializeShell(grammar: string) {
+  // A package shell with a binding.gyp present but no prebuild / built binary.
+  const pkg = path.join(tmpRoot, 'node_modules', `tree-sitter-${grammar}`);
+  mkdirSync(path.join(pkg, 'bindings', 'node'), { recursive: true });
+  writeFileSync(path.join(pkg, 'binding.gyp'), '{ "targets": [] }');
+  writeFileSync(path.join(pkg, 'bindings', 'node', 'index.js'), '');
+}
+
+describe('build-tree-sitter-grammars.cjs consolidated activation', () => {
+  it('optional grammar: exits 0 and reports skipping under GITNEXUS_SKIP_OPTIONAL_GRAMMARS=1', () => {
+    const r = runBuild('swift', { GITNEXUS_SKIP_OPTIONAL_GRAMMARS: '1' });
+    expect(r.status).toBe(0);
+    expect(r.signal).toBeNull();
+    expect(r.stderr).toContain('[tree-sitter-swift] Skipping build');
+    expect(r.stderr).not.toContain('Swift (.swift) parsing will be unavailable');
+  });
+
+  it('REQUIRED grammar (c): ignores GITNEXUS_SKIP_OPTIONAL_GRAMMARS (no skip message)', () => {
+    // c is required — the opt-out must NOT short-circuit it. With nothing
+    // materialized it silently exits 0 at the binding.gyp-absent check.
+    const r = runBuild('c', { GITNEXUS_SKIP_OPTIONAL_GRAMMARS: '1' });
+    expect(r.status).toBe(0);
+    expect(r.signal).toBeNull();
+    expect(r.stderr).not.toContain('Skipping build (GITNEXUS_SKIP_OPTIONAL_GRAMMARS=1)');
+  });
+
+  it('exits 0 silently when the materialized package is absent (no binding.gyp)', () => {
+    const r = runBuild('kotlin', {});
+    expect(r.status).toBe(0);
+    expect(r.signal).toBeNull();
+    expect(r.stderr).not.toContain('Kotlin (.kt/.kts) parsing will be unavailable');
+  });
+
+  it('exits 0 (warning) when a grammar has a binding.gyp but no prebuild/build deps', () => {
+    materializeShell('kotlin');
+    try {
+      const r = runBuild('kotlin', {});
+      expect(r.status).toBe(0);
+      expect(r.signal).toBeNull();
+      expect(r.stderr).toMatch(/hoisted build deps not resolvable|Could not build native binding/);
+      expect(r.stderr).not.toContain('built successfully');
+    } finally {
+      rmSync(path.join(tmpRoot, 'node_modules'), { recursive: true, force: true });
+    }
+  });
+
+  it('unknown grammar arg: warns and exits 0', () => {
+    const r = runBuild('haskell', {});
+    expect(r.status).toBe(0);
+    expect(r.signal).toBeNull();
+    expect(r.stderr).toContain("Unknown grammar 'haskell'");
+  });
+
+  it('never exits non-zero across grammars and env permutations (postinstall hard invariant)', () => {
+    for (const grammar of ['c', 'dart', 'proto', 'swift', 'kotlin']) {
+      for (const overrides of [{ GITNEXUS_SKIP_OPTIONAL_GRAMMARS: '1' }, {}]) {
+        const r = runBuild(grammar, overrides);
+        expect(r.status, `${grammar} ${JSON.stringify(overrides)}`).toBe(0);
+        expect(r.signal).toBeNull();
+      }
+    }
+  });
+});
diff --git a/gitnexus/test/unit/build-tree-sitter-kotlin-probe.test.ts b/gitnexus/test/unit/build-tree-sitter-kotlin-probe.test.ts
deleted file mode 100644
index f168a9b9d..000000000
--- a/gitnexus/test/unit/build-tree-sitter-kotlin-probe.test.ts
+++ /dev/null
@@ -1,109 +0,0 @@
-import { describe, it, expect, beforeAll, afterAll } from 'vitest';
-import { spawnSync } from 'node:child_process';
-import { mkdtempSync, mkdirSync, writeFileSync, readFileSync, rmSync } from 'node:fs';
-import { tmpdir } from 'node:os';
-import path from 'node:path';
-import { fileURLToPath } from 'node:url';
-
-/**
- * Behavioral coverage for the postinstall activation script
- * `scripts/build-tree-sitter-kotlin.cjs`.
- *
- * Kotlin is a vendored grammar (like Swift/Dart/Proto/C). The script prefers a
- * committed prebuild for this platform-arch (toolchain-free); if none matches it
- * source-builds from the vendored grammar source. Its hard invariant is that it
- * MUST NEVER exit non-zero — it runs in `gitnexus`'s postinstall, so a non-zero
- * exit would break `npm install gitnexus` for every user. This suite executes
- * the real script bytes across its branches and asserts exit code 0 every time.
- *
- * The script is copied into an isolated temp `scripts/` dir so its
- * `__dirname`-relative `../node_modules/tree-sitter-kotlin` resolves under our
- * control (absent dir, or a present-but-unbuildable dir) without touching the
- * repo's real node_modules. The temp dir has no reachable `node-gyp-build` /
- * `node-addon-api`, so the source-build path stops at the "hoisted build deps
- * not resolvable" guard (still exit 0) instead of invoking a real compile.
- */
-
-const probeSource = readFileSync(
-  fileURLToPath(new URL('../../scripts/build-tree-sitter-kotlin.cjs', import.meta.url)),
-  'utf8',
-);
-
-// Catch-branch sentinel (only printed when an actual node-gyp build is attempted
-// and throws) — must NOT appear on the deps-unavailable guard path.
-const CATCH_UNAVAILABLE = 'Kotlin (.kt/.kts) parsing will be unavailable';
-
-let tmpRoot: string;
-let scriptPath: string;
-
-beforeAll(() => {
-  tmpRoot = mkdtempSync(path.join(tmpdir(), 'gn-kotlin-build-'));
-  mkdirSync(path.join(tmpRoot, 'scripts'), { recursive: true });
-  scriptPath = path.join(tmpRoot, 'scripts', 'build-tree-sitter-kotlin.cjs');
-  writeFileSync(scriptPath, probeSource);
-});
-
-afterAll(() => {
-  rmSync(tmpRoot, { recursive: true, force: true });
-});
-
-function runProbe(overrides: Record<string, string | undefined>) {
-  const env: Record<string, string> = {};
-  for (const [k, v] of Object.entries(process.env)) {
-    if (v !== undefined) env[k] = v;
-  }
-  delete env.GITNEXUS_SKIP_OPTIONAL_GRAMMARS;
-  for (const [k, v] of Object.entries(overrides)) {
-    if (v === undefined) delete env[k];
-    else env[k] = v;
-  }
-  return spawnSync(process.execPath, [scriptPath], { env, encoding: 'utf8', timeout: 30_000 });
-}
-
-describe('build-tree-sitter-kotlin.cjs vendored grammar activation', () => {
-  it('exits 0 and reports skipping when GITNEXUS_SKIP_OPTIONAL_GRAMMARS=1', () => {
-    const r = runProbe({ GITNEXUS_SKIP_OPTIONAL_GRAMMARS: '1' });
-    expect(r.status).toBe(0);
-    expect(r.signal).toBeNull();
-    expect(r.stderr).toContain('Skipping build');
-    expect(r.stderr).not.toContain(CATCH_UNAVAILABLE);
-  });
-
-  it('exits 0 silently when the materialized package is absent (no binding.gyp)', () => {
-    // No node_modules/tree-sitter-kotlin next to the script — materialize was
-    // skipped/failed, so there is no binding.gyp to build. Silent exit 0.
-    const r = runProbe({});
-    expect(r.status).toBe(0);
-    expect(r.signal).toBeNull();
-    expect(r.stderr).not.toContain(CATCH_UNAVAILABLE);
-  });
-
-  it('exits 0 (warning) when the package has a binding.gyp but no prebuild/build deps', () => {
-    // Materialize a package with binding.gyp present but no prebuild and no
-    // build/Release/*.node. The script falls through prefer-prebuild to the
-    // source-build path; in this temp env node-gyp-build/node-addon-api are not
-    // resolvable, so it stops at the deps guard (or, if they were resolvable,
-    // the node-gyp build would fail) — either way it warns and exits 0.
-    const pkg = path.join(tmpRoot, 'node_modules', 'tree-sitter-kotlin');
-    mkdirSync(path.join(pkg, 'bindings', 'node'), { recursive: true });
-    writeFileSync(path.join(pkg, 'binding.gyp'), '{ "targets": [] }');
-    writeFileSync(path.join(pkg, 'bindings', 'node', 'index.js'), '');
-    try {
-      const r = runProbe({});
-      expect(r.status).toBe(0);
-      expect(r.signal).toBeNull();
-      expect(r.stderr).toMatch(/hoisted build deps not resolvable|Could not build native binding/);
-      expect(r.stderr).not.toContain('built successfully');
-    } finally {
-      rmSync(path.join(tmpRoot, 'node_modules'), { recursive: true, force: true });
-    }
-  });
-
-  it('never exits non-zero across env permutations (postinstall hard invariant)', () => {
-    for (const overrides of [{ GITNEXUS_SKIP_OPTIONAL_GRAMMARS: '1' }, {}]) {
-      const r = runProbe(overrides);
-      expect(r.status).toBe(0);
-      expect(r.signal).toBeNull();
-    }
-  });
-});
diff --git a/gitnexus/test/unit/build-tree-sitter-swift-probe.test.ts b/gitnexus/test/unit/build-tree-sitter-swift-probe.test.ts
deleted file mode 100644
index 85a0c733a..000000000
--- a/gitnexus/test/unit/build-tree-sitter-swift-probe.test.ts
+++ /dev/null
@@ -1,109 +0,0 @@
-import { describe, it, expect, beforeAll, afterAll } from 'vitest';
-import { spawnSync } from 'node:child_process';
-import { mkdtempSync, mkdirSync, writeFileSync, readFileSync, rmSync } from 'node:fs';
-import { tmpdir } from 'node:os';
-import path from 'node:path';
-import { fileURLToPath } from 'node:url';
-
-/**
- * Behavioral coverage for the postinstall activation script
- * `scripts/build-tree-sitter-swift.cjs`.
- *
- * Swift is a vendored grammar, unified with Kotlin/Dart/Proto/C: the script
- * prefers a committed prebuild for this platform-arch (toolchain-free); if none
- * matches it source-builds from the vendored grammar source. Its hard invariant
- * is that it MUST NEVER exit non-zero — it runs in `gitnexus`'s postinstall, so a
- * non-zero exit would break `npm install gitnexus` for every user. This suite
- * executes the real script bytes across its branches and asserts exit code 0
- * every time (mirrors build-tree-sitter-kotlin-probe.test.ts).
- *
- * The script is copied into an isolated temp `scripts/` dir so its
- * `__dirname`-relative `../node_modules/tree-sitter-swift` resolves under our
- * control. The temp dir has no reachable `node-gyp-build` / `node-addon-api`, so
- * the source-build path stops at the "hoisted build deps not resolvable" guard
- * (still exit 0) instead of invoking a real compile.
- */
-
-const probeSource = readFileSync(
-  fileURLToPath(new URL('../../scripts/build-tree-sitter-swift.cjs', import.meta.url)),
-  'utf8',
-);
-
-// Catch-branch sentinel (only printed when an actual node-gyp build is attempted
-// and throws) — must NOT appear on the deps-unavailable guard path.
-const CATCH_UNAVAILABLE = 'Swift (.swift) parsing will be unavailable';
-
-let tmpRoot: string;
-let scriptPath: string;
-
-beforeAll(() => {
-  tmpRoot = mkdtempSync(path.join(tmpdir(), 'gn-swift-build-'));
-  mkdirSync(path.join(tmpRoot, 'scripts'), { recursive: true });
-  scriptPath = path.join(tmpRoot, 'scripts', 'build-tree-sitter-swift.cjs');
-  writeFileSync(scriptPath, probeSource);
-});
-
-afterAll(() => {
-  rmSync(tmpRoot, { recursive: true, force: true });
-});
-
-function runProbe(overrides: Record<string, string | undefined>) {
-  const env: Record<string, string> = {};
-  for (const [k, v] of Object.entries(process.env)) {
-    if (v !== undefined) env[k] = v;
-  }
-  delete env.GITNEXUS_SKIP_OPTIONAL_GRAMMARS;
-  for (const [k, v] of Object.entries(overrides)) {
-    if (v === undefined) delete env[k];
-    else env[k] = v;
-  }
-  return spawnSync(process.execPath, [scriptPath], { env, encoding: 'utf8', timeout: 30_000 });
-}
-
-describe('build-tree-sitter-swift.cjs vendored grammar activation', () => {
-  it('exits 0 and reports skipping when GITNEXUS_SKIP_OPTIONAL_GRAMMARS=1', () => {
-    const r = runProbe({ GITNEXUS_SKIP_OPTIONAL_GRAMMARS: '1' });
-    expect(r.status).toBe(0);
-    expect(r.signal).toBeNull();
-    expect(r.stderr).toContain('Skipping build');
-    expect(r.stderr).not.toContain(CATCH_UNAVAILABLE);
-  });
-
-  it('exits 0 silently when the materialized package is absent (no binding.gyp)', () => {
-    // No node_modules/tree-sitter-swift next to the script — materialize was
-    // skipped/failed, so there is no binding.gyp to build. Silent exit 0.
-    const r = runProbe({});
-    expect(r.status).toBe(0);
-    expect(r.signal).toBeNull();
-    expect(r.stderr).not.toContain(CATCH_UNAVAILABLE);
-  });
-
-  it('exits 0 (warning) when the package has a binding.gyp but no prebuild/build deps', () => {
-    // Materialize a package with binding.gyp present but no prebuild and no
-    // build/Release/*.node. The script falls through prefer-prebuild to the
-    // source-build path; in this temp env node-gyp-build/node-addon-api are not
-    // resolvable, so it stops at the deps guard (or, if they were resolvable,
-    // the node-gyp build would fail) — either way it warns and exits 0.
-    const pkg = path.join(tmpRoot, 'node_modules', 'tree-sitter-swift');
-    mkdirSync(path.join(pkg, 'bindings', 'node'), { recursive: true });
-    writeFileSync(path.join(pkg, 'binding.gyp'), '{ "targets": [] }');
-    writeFileSync(path.join(pkg, 'bindings', 'node', 'index.js'), '');
-    try {
-      const r = runProbe({});
-      expect(r.status).toBe(0);
-      expect(r.signal).toBeNull();
-      expect(r.stderr).toMatch(/hoisted build deps not resolvable|Could not build native binding/);
-      expect(r.stderr).not.toContain('built successfully');
-    } finally {
-      rmSync(path.join(tmpRoot, 'node_modules'), { recursive: true, force: true });
-    }
-  });
-
-  it('never exits non-zero across env permutations (postinstall hard invariant)', () => {
-    for (const overrides of [{ GITNEXUS_SKIP_OPTIONAL_GRAMMARS: '1' }, {}]) {
-      const r = runProbe(overrides);
-      expect(r.status).toBe(0);
-      expect(r.signal).toBeNull();
-    }
-  });
-});
diff --git a/gitnexus/test/unit/cli-commands.test.ts b/gitnexus/test/unit/cli-commands.test.ts
index 127b7c5ef..c3b4ce9b9 100644
--- a/gitnexus/test/unit/cli-commands.test.ts
+++ b/gitnexus/test/unit/cli-commands.test.ts
@@ -93,14 +93,14 @@ describe('CLI commands', () => {
       // gate's assumptions (setTimeoutMicros semantics, ABI 13–14 grammar
       // range) can't drift under a minor bump.
       expect(pkg.default.dependencies['tree-sitter']).toBe('0.21.1');
-      expect(pkg.default.scripts.postinstall).toContain('build-tree-sitter-swift.cjs');
+      expect(pkg.default.scripts.postinstall).toContain('build-tree-sitter-grammars.cjs');
       expect(swiftPkg.default.version).toBe('0.7.1');
       // No scripts.install / dependencies inside vendor/ (#836 / #1728 hygiene).
       expect(swiftPkg.default.scripts?.install).toBeUndefined();
       expect(swiftPkg.default.dependencies).toBeUndefined();
       expect(swiftPkg.default.peerDependencies['tree-sitter']).toContain('^0.21.1');
       // Swift is now unified with Dart/Proto/Kotlin/C: the grammar SOURCE is
-      // vendored so build-tree-sitter-swift.cjs can source-build the binding
+      // vendored so build-tree-sitter-grammars.cjs can source-build the binding
       // when no committed prebuild matches (e.g. CI before prebuilds land).
       const bindingGyp = await fs.readFile(
         path.join(REPO_ROOT, 'gitnexus/vendor/tree-sitter-swift/binding.gyp'),
@@ -123,7 +123,7 @@ describe('CLI commands', () => {
       // optionalDependency. Its prebuilds are GitNexus-cross-built (upstream
       // ships source only) and materialized into node_modules/ at postinstall.
       expect(optional['tree-sitter-kotlin']).toBeUndefined();
-      expect(pkg.default.scripts.postinstall).toContain('build-tree-sitter-kotlin.cjs');
+      expect(pkg.default.scripts.postinstall).toContain('build-tree-sitter-grammars.cjs');
       expect(kotlinPkg.default.version).toBe('0.3.8');
       // No scripts.install / dependencies inside vendor/ (#836 / #1728 hygiene).
       expect(kotlinPkg.default.scripts?.install).toBeUndefined();
@@ -140,7 +140,7 @@ describe('CLI commands', () => {
       // (upstream ships 4/6). Vendored with GitNexus-built prebuilds for all 6,
       // held at 0.21.4 for ABI safety (#1242) — so it is NOT an npm dependency.
       expect(pkg.default.dependencies['tree-sitter-c']).toBeUndefined();
-      expect(pkg.default.scripts.postinstall).toContain('build-tree-sitter-c.cjs');
+      expect(pkg.default.scripts.postinstall).toContain('build-tree-sitter-grammars.cjs');
       expect(cPkg.default.version).toBe('0.21.4');
       expect(cPkg.default.scripts?.install).toBeUndefined();
       expect(cPkg.default.dependencies).toBeUndefined();
diff --git a/gitnexus/vendor/tree-sitter-c/README.md b/gitnexus/vendor/tree-sitter-c/README.md
index 52e7c86bc..03f7d0ec8 100644
--- a/gitnexus/vendor/tree-sitter-c/README.md
+++ b/gitnexus/vendor/tree-sitter-c/README.md
@@ -5,7 +5,7 @@ This directory is a GitNexus-managed **runtime** package derived from
 (`bindings/node/`, `src/node-types.json`, `LICENSE`), the native `prebuilds/`,
 **and** the grammar source (`binding.gyp`, `src/parser.c`, `src/tree_sitter/`).
 The prebuilds make C parsing toolchain-free; the source lets
-`build-tree-sitter-c.cjs` compile the binding on a toolchain host when no
+`build-tree-sitter-grammars.cjs` compile the binding on a toolchain host when no
 prebuild matches (e.g. CI before the prebuilds are vendored).
 
 ### Why this is vendored (unlike the other npm grammars)
diff --git a/gitnexus/vendor/tree-sitter-kotlin/README.md b/gitnexus/vendor/tree-sitter-kotlin/README.md
index 5a9af1970..216354156 100644
--- a/gitnexus/vendor/tree-sitter-kotlin/README.md
+++ b/gitnexus/vendor/tree-sitter-kotlin/README.md
@@ -15,8 +15,8 @@ Upstream `tree-sitter-kotlin` ships **source only** — its npm tarball has no
 and requires a C/C++ toolchain (`python3`/`make`/`g++`). To make Kotlin parsing
 toolchain-free on every host (Swift parity), GitNexus builds the platform
 prebuilds itself and vendors them here. `node-gyp-build` selects the correct
-binary at require time; `build-tree-sitter-kotlin.cjs` probes availability at
-install time.
+binary at require time; `build-tree-sitter-grammars.cjs` activates the binding
+(prefer prebuild, else source-build) at install time.
 
 `tree-sitter-swift` is handled the same way now: its prebuilds were originally
 **copied from upstream** (Swift ships them), but it is unified with this pipeline —
diff --git a/gitnexus/vendor/tree-sitter-swift/README.md b/gitnexus/vendor/tree-sitter-swift/README.md
index 53f7a26d7..cc2aaca9c 100644
--- a/gitnexus/vendor/tree-sitter-swift/README.md
+++ b/gitnexus/vendor/tree-sitter-swift/README.md
@@ -8,7 +8,7 @@ upgrade is handled separately.
 Unified with the Dart/Proto/Kotlin/C vendored grammars, this copy also vendors
 the grammar **source** — `binding.gyp`, `bindings/node/binding.cc`,
 `src/parser.c` (the ABI-14 default; ~18 MB, compresses heavily in git),
-`src/scanner.c`, and `src/tree_sitter/` — so `gitnexus/scripts/build-tree-sitter-swift.cjs`
+`src/scanner.c`, and `src/tree_sitter/` — so `gitnexus/scripts/build-tree-sitter-grammars.cjs`
 can source-build the native binding on any toolchain host when no committed
 prebuild matches (e.g. CI before the prebuilds land). Note: upstream
 deliberately omits the generated `parser.c` (see the FAQ below); GitNexus
diff --git a/gitnexus/vendor/tree-sitter-swift/package.json b/gitnexus/vendor/tree-sitter-swift/package.json
index 8a2ce7d61..3330c784c 100644
--- a/gitnexus/vendor/tree-sitter-swift/package.json
+++ b/gitnexus/vendor/tree-sitter-swift/package.json
@@ -9,7 +9,7 @@
     "type": "git",
     "url": "git+https://github.com/alex-pinkus/tree-sitter-swift.git"
   },
-  "_vendoredBy": "gitnexus - runtime package derived from official tree-sitter-swift@0.7.1 (gitHead 88bfd19a89be9d0481b14566fb6160cccea2fe0a). Unified with Dart/Proto/Kotlin/C: the grammar source (parser.c/scanner.c/binding.gyp + src/) is ALSO vendored so build-tree-sitter-swift.cjs can source-build the binding on a toolchain host when no prebuild matches (e.g. CI before prebuilds land); src/parser.c is the ABI-14 default (~18 MB on disk, compresses heavily in git — the upstream parser_abi13.c alternate is not vendored). The native prebuilds/ are GitNexus-cross-built by .github/workflows/build-tree-sitter-prebuilds.yml (originally upstream-shipped). Build activation runs via gitnexus/scripts/build-tree-sitter-swift.cjs after materialize-vendor-grammars.cjs (no scripts.install here — avoids #836 / #1728).",
+  "_vendoredBy": "gitnexus - runtime package derived from official tree-sitter-swift@0.7.1 (gitHead 88bfd19a89be9d0481b14566fb6160cccea2fe0a). Unified with Dart/Proto/Kotlin/C: the grammar source (parser.c/scanner.c/binding.gyp + src/) is ALSO vendored so build-tree-sitter-grammars.cjs can source-build the binding on a toolchain host when no prebuild matches (e.g. CI before prebuilds land); src/parser.c is the ABI-14 default (~18 MB on disk, compresses heavily in git — the upstream parser_abi13.c alternate is not vendored). The native prebuilds/ are GitNexus-cross-built by .github/workflows/build-tree-sitter-prebuilds.yml (originally upstream-shipped). Build activation runs via gitnexus/scripts/build-tree-sitter-grammars.cjs after materialize-vendor-grammars.cjs (no scripts.install here — avoids #836 / #1728).",
   "peerDependencies": {
     "tree-sitter": "^0.21.1 || ^0.22.1"
   },