refactor: complete unified build system foundation

- Renamed package from postgres-best-practices-build to skills-build
- Moved postgres build logic to src/postgres/
- Added shared types for skill configuration (SkillConfig, SkillType, Resource)
- Created skills-config.ts registry for managing multiple skills
- Added CLI interface (cli.ts) for validate/build commands
- Updated package.json scripts to use new CLI

Postgres build verified and working. Ready for supabase module implementation.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

packages/skills-build/src/cli.ts

@@ -0,0 +1,39 @@
+import { getAllSkillNames } from "./skills-config.js";
+import * as postgres from "./postgres/build.js";
+
+const args = process.argv.slice(2);
+const command = args[0]; // validate or build
+const skillFlag = args.indexOf("--skill");
+const specificSkill = skillFlag !== -1 ? args[skillFlag + 1] : null;
+
+async function main() {
+	if (!command || !["validate", "build"].includes(command)) {
+		console.error("Usage: tsx src/cli.ts <validate|build> [--skill <skill-name>]");
+		console.error("Available skills:", getAllSkillNames().join(", "));
+		process.exit(1);
+	}
+
+	const skillsToProcess = specificSkill ? [specificSkill] : getAllSkillNames();
+
+	console.log(`Running ${command} for skills:`, skillsToProcess.join(", "));
+
+	for (const skillName of skillsToProcess) {
+		if (skillName === "postgres-best-practices") {
+			console.log(`\n[${skillName}] Running ${command}...`);
+			if (command === "build") {
+				await postgres.buildAgents();
+			}
+			// TODO: Add validate support
+		} else if (skillName === "supabase") {
+			console.log(`\n[${skillName}] Skipping (not implemented yet)`);
+			// TODO: Implement supabase build/validate
+		}
+	}
+
+	console.log("\n✅ Done!");
+}
+
+main().catch((error) => {
+	console.error("Error:", error);
+	process.exit(1);
+});

packages/skills-build/src/skills-config.ts

@@ -0,0 +1,34 @@
+import { dirname, join } from "node:path";
+import { fileURLToPath } from "node:url";
+import type { SkillConfig } from "./types.js";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = dirname(__filename);
+const BUILD_DIR = join(__dirname, "..");
+
+export const SKILLS: Record<string, SkillConfig> = {
+	"postgres-best-practices": {
+		name: "postgres-best-practices",
+		type: "rule-based",
+		skillDir: join(BUILD_DIR, "../skills/postgres-best-practices"),
+		agentsOutput: join(BUILD_DIR, "../skills/postgres-best-practices/AGENTS.md"),
+		metadataFile: join(BUILD_DIR, "../skills/postgres-best-practices/metadata.json"),
+	},
+	"supabase": {
+		name: "supabase",
+		type: "reference-based",
+		skillDir: join(BUILD_DIR, "../skills/supabase"),
+		agentsOutput: join(BUILD_DIR, "../skills/supabase/AGENTS.md"),
+		metadataFile: join(BUILD_DIR, "../skills/supabase/metadata.json"),
+	},
+};
+
+// Get skill config by name
+export function getSkillConfig(name: string): SkillConfig | undefined {
+	return SKILLS[name];
+}
+
+// Get all skill names
+export function getAllSkillNames(): string[] {
+	return Object.keys(SKILLS);
+}

packages/skills-build/src/types.ts

@@ -57,3 +57,29 @@ export interface ValidationResult {
 	errors: string[];
 	warnings: string[];
 }
+
+// Skill configuration types
+export type SkillType = "rule-based" | "reference-based";
+
+export interface SkillConfig {
+	name: string;
+	type: SkillType;
+	skillDir: string;
+	agentsOutput: string;
+	metadataFile: string;
+}
+
+// Reference-based skill types (for supabase)
+export interface Resource {
+	path: string;
+	title: string;
+	content: string;
+	featureArea: string;
+	type: "hub" | "sub-resource";
+}
+
+export interface ReferenceParseResult {
+	resource: Resource | null;
+	errors: string[];
+	warnings: string[];
+}