feat(cli): extract Obelisk runtime into npm package

Add @obelisk-apps/cli with the existing build, search, query, and attune contract plus official skill installation.

Separate the docs-only skill artifact, bootstrap installer, release layout, cross-platform CI, and package-level regression coverage.

packages/core/src/core.ts

@@ -1,11 +1,11 @@
 // Obelisk Core package (see docs/adr/0003-core-typescript-esm-precompiled.md).
 //
-// The single shared implementation behind every transport. runtime.js (skill),
-// and later the CLI and MCP server, are thin shells over these four functions;
+// The single shared implementation behind every transport. The CLI and later
+// the MCP server are thin shells over these four functions;
 // none of them re-implement retrieval or own the DB lifecycle.
 //
 // Authored in TypeScript with erasable-only syntax so Node can run it directly
-// via type stripping in development, while the skill artifact ships readable,
+// via type stripping in development, while the CLI package ships readable,
 // non-bundled tsc output. Core source lives in the @obelisk/core workspace.
 
 import { createContext, runInNewContext } from 'node:vm';

packages/core/src/persist.ts

@@ -2,7 +2,7 @@
 //
 // Provider-agnostic and binding-agnostic: it consumes the IndexRecord stream
 // from any adapter's parse() and writes rows into the injected database handle
-// (node:sqlite for the skill/CLI, better-sqlite3 for the app — they share the
+// (node:sqlite for the CLI, better-sqlite3 for the app — they share the
 // prepare/run/get API). It is the ONLY layer that touches the database and the
 // only place that knows the schema. Adapters stay pure.
 //

packages/core/src/runtime.ts

@@ -1,49 +0,0 @@
-#!/usr/bin/env node
-// Skill transport: a typed thin CLI shell over the Obelisk Core package.
-// It only parses args, reads script files, prints JSON, and owns the uniform
-// { error, stack } + exit-1 error envelope. All logic lives in Core.
-
-import { createRequire } from 'node:module';
-const require = createRequire(import.meta.url);
-const fs = require('node:fs');
-const path = require('node:path');
-
-import { DB_PATH, buildIndex, searchText, executeQuery, executeAttune } from './core.ts';
-
-async function main() {
-  const args = process.argv.slice(2);
-  // Uniform error envelope across all four verbs: a failure is reported as
-  // { error, stack } on stdout with exit code 1, never a raw crash on stderr.
-  const fail = (e: unknown): void => {
-    const error = e instanceof Error ? e : new Error(String(e));
-    process.stdout.write(JSON.stringify({ error: error.message, stack: error.stack }) + '\n');
-    process.exitCode = 1;
-  };
-  const emit = (r: unknown): void => {
-    process.stdout.write(JSON.stringify(r, null, 2) + '\n');
-  };
-
-  if (args[0] === '--build') {
-    try {
-      buildIndex({ force: true });
-      process.stdout.write(JSON.stringify({ ok: true, db: DB_PATH }) + '\n');
-    } catch (e) { fail(e); }
-    return;
-  }
-  if (args[0] === '--search' && args[1]) {
-    try { emit(searchText(args.slice(1).join(' '))); } catch (e) { fail(e); }
-    return;
-  }
-  if (args[0] === '--query' && args[1]) {
-    try { emit(await executeQuery(fs.readFileSync(path.resolve(args[1]), 'utf8'))); } catch (e) { fail(e); }
-    return;
-  }
-  if (args[0] === '--attune' && args[1]) {
-    try { emit(await executeAttune(fs.readFileSync(path.resolve(args[1]), 'utf8'))); } catch (e) { fail(e); }
-    return;
-  }
-  process.stderr.write('Usage:\n  node runtime.js --build\n  node runtime.js --search "text"\n  node runtime.js --query <file.js>\n  node runtime.js --attune <file.js>\n');
-  process.exitCode = 1;
-}
-
-main();

packages/core/src/tx.ts

@@ -1,6 +1,6 @@
 // Binding-agnostic SQLite write plumbing shared from the Core package
 // (docs/adr/0006). The injected db must expose `exec(sql)`; this works for both
-// node:sqlite (skill/CLI) and better-sqlite3 (app), same injection model as
+// node:sqlite (CLI) and better-sqlite3 (app), same injection model as
 // `persist`.
 
 export interface WriteTxDb {