feature: improve postgres best practices and add evals

.mcp.json

@@ -3,6 +3,10 @@
 		"supabase": {
 			"type": "http",
 			"url": "https://mcp.supabase.com/mcp?features=docs"
+		},
+		"linear": {
+			"type": "http",
+			"url": "https://mcp.linear.app/mcp"
 		}
 	}
 }

packages/skills-build/src/build.ts

@@ -7,7 +7,12 @@ import {
 	validateSkillExists,
 } from "./config.js";
 import { parseRuleFile } from "./parser.js";
-import type { Metadata, Rule, Section } from "./types.js";
+import {
+	filterRulesForProfile,
+	listProfiles,
+	loadProfile,
+} from "./profiles.js";
+import type { Metadata, Profile, Rule, Section } from "./types.js";
 import { validateRuleFile } from "./validate.js";
 
 /**
@@ -225,8 +230,13 @@ export function generateSectionMap(
 /**
  * Build AGENTS.md for a specific skill
  */
-function buildSkill(paths: SkillPaths): void {
-	console.log(`[${paths.name}] Building AGENTS.md...`);
+function buildSkill(paths: SkillPaths, profile?: Profile): void {
+	const profileSuffix = profile ? `.${profile.name}` : "";
+	const outputFile = profile
+		? paths.agentsOutput.replace(".md", `${profileSuffix}.md`)
+		: paths.agentsOutput;
+
+	console.log(`[${paths.name}] Building AGENTS${profileSuffix}.md...`);
 
 	// Load metadata and sections
 	const metadata = loadMetadata(paths.skillFile, paths.name);
@@ -237,10 +247,7 @@ function buildSkill(paths: SkillPaths): void {
 	// Check if references directory exists
 	if (!existsSync(paths.referencesDir)) {
 		console.log(`  No references directory found. Generating empty AGENTS.md.`);
-		writeFileSync(
-			paths.agentsOutput,
-			`# ${skillTitle}\n\nNo rules defined yet.\n`,
-		);
+		writeFileSync(outputFile, `# ${skillTitle}\n\nNo rules defined yet.\n`);
 		return;
 	}
 
@@ -272,10 +279,19 @@ function buildSkill(paths: SkillPaths): void {
 		}
 	}
 
+	// Filter rules by profile if specified
+	let filteredRules = rules;
+	if (profile) {
+		filteredRules = filterRulesForProfile(rules, profile);
+		console.log(
+			`  Filtered to ${filteredRules.length} rules for profile "${profile.name}"`,
+		);
+	}
+
 	// Group rules by section and assign IDs
 	const rulesBySection = new Map<number, Rule[]>();
 
-	for (const rule of rules) {
+	for (const rule of filteredRules) {
 		const sectionRules = rulesBySection.get(rule.section) || [];
 		sectionRules.push(rule);
 		rulesBySection.set(rule.section, sectionRules);
@@ -350,6 +366,20 @@ function buildSkill(paths: SkillPaths): void {
 				output.push(`**Impact: ${rule.impact}**\n`);
 			}
 
+			// Add prerequisites if minVersion or extensions are specified
+			const prerequisites: string[] = [];
+			if (rule.minVersion) {
+				prerequisites.push(`PostgreSQL ${rule.minVersion}+`);
+			}
+			if (rule.extensions && rule.extensions.length > 0) {
+				prerequisites.push(
+					`Extension${rule.extensions.length > 1 ? "s" : ""}: ${rule.extensions.join(", ")}`,
+				);
+			}
+			if (prerequisites.length > 0) {
+				output.push(`**Prerequisites:** ${prerequisites.join(" | ")}\n`);
+			}
+
 			output.push(`${rule.explanation}\n`);
 
 			for (const example of rule.examples) {
@@ -394,9 +424,56 @@ function buildSkill(paths: SkillPaths): void {
 	}
 
 	// Write output
-	writeFileSync(paths.agentsOutput, output.join("\n"));
-	console.log(`  Generated: ${paths.agentsOutput}`);
-	console.log(`  Total rules: ${rules.length}`);
+	writeFileSync(outputFile, output.join("\n"));
+	console.log(`  Generated: ${outputFile}`);
+	console.log(`  Total rules: ${filteredRules.length}`);
+}
+
+/**
+ * Parse CLI arguments
+ */
+function parseArgs(): {
+	skill?: string;
+	profile?: string;
+	allProfiles: boolean;
+} {
+	const args = process.argv.slice(2);
+	let skill: string | undefined;
+	let profile: string | undefined;
+	let allProfiles = false;
+
+	for (let i = 0; i < args.length; i++) {
+		const arg = args[i];
+		if (arg === "--profile" && args[i + 1]) {
+			profile = args[i + 1];
+			i++;
+		} else if (arg === "--all-profiles") {
+			allProfiles = true;
+		} else if (!arg.startsWith("--")) {
+			skill = arg;
+		}
+	}
+
+	return { skill, profile, allProfiles };
+}
+
+/**
+ * Build a skill with all available profiles
+ */
+function buildSkillWithAllProfiles(paths: SkillPaths): void {
+	const profilesDir = join(paths.skillDir, "profiles");
+	const profiles = listProfiles(profilesDir);
+
+	// Build default (no profile)
+	buildSkill(paths);
+
+	// Build each profile variant
+	for (const profileName of profiles) {
+		const profile = loadProfile(profilesDir, profileName);
+		if (profile) {
+			buildSkill(paths, profile);
+		}
+	}
 }
 
 // Run build when executed directly
@@ -405,7 +482,7 @@ const isMainModule =
 	process.argv[1]?.endsWith("build.js");
 
 if (isMainModule) {
-	const targetSkill = process.argv[2];
+	const { skill: targetSkill, profile: profileName, allProfiles } = parseArgs();
 
 	if (targetSkill) {
 		// Build specific skill
@@ -417,7 +494,29 @@ if (isMainModule) {
 			}
 			process.exit(1);
 		}
-		buildSkill(getSkillPaths(targetSkill));
+
+		const paths = getSkillPaths(targetSkill);
+
+		if (allProfiles) {
+			// Build all profile variants
+			buildSkillWithAllProfiles(paths);
+		} else if (profileName) {
+			// Build with specific profile
+			const profilesDir = join(paths.skillDir, "profiles");
+			const profile = loadProfile(profilesDir, profileName);
+			if (!profile) {
+				console.error(`Error: Profile "${profileName}" not found`);
+				const available = listProfiles(profilesDir);
+				if (available.length > 0) {
+					console.error(`Available profiles: ${available.join(", ")}`);
+				}
+				process.exit(1);
+			}
+			buildSkill(paths, profile);
+		} else {
+			// Build default
+			buildSkill(paths);
+		}
 	} else {
 		// Build all skills
 		const skills = discoverSkills();
@@ -428,7 +527,12 @@ if (isMainModule) {
 
 		console.log(`Found ${skills.length} skill(s): ${skills.join(", ")}\n`);
 		for (const skill of skills) {
-			buildSkill(getSkillPaths(skill));
+			const paths = getSkillPaths(skill);
+			if (allProfiles) {
+				buildSkillWithAllProfiles(paths);
+			} else {
+				buildSkill(paths);
+			}
 			console.log("");
 		}
 	}

packages/skills-build/src/parser.ts

@@ -251,6 +251,8 @@ export function parseRuleFile(
 		const examples = extractExamples(body);
 
 		const tags = frontmatter.tags?.split(",").map((t) => t.trim()) || [];
+		const extensions =
+			frontmatter.extensions?.split(",").map((e) => e.trim()) || [];
 
 		// Validation warnings
 		if (!explanation || explanation.length < 20) {
@@ -271,6 +273,8 @@ export function parseRuleFile(
 			examples,
 			references: extractReferences(body),
 			tags: tags.length > 0 ? tags : undefined,
+			minVersion: frontmatter.minVersion || undefined,
+			extensions: extensions.length > 0 ? extensions : undefined,
 		};
 
 		return { success: true, rule, errors, warnings };

packages/skills-build/src/profiles.ts

@@ -0,0 +1,111 @@
+import { existsSync, readdirSync, readFileSync } from "node:fs";
+import { join } from "node:path";
+import type { Profile, Rule } from "./types.js";
+
+/**
+ * Load a profile from the profiles directory
+ */
+export function loadProfile(
+	profilesDir: string,
+	profileName: string,
+): Profile | null {
+	const profileFile = join(profilesDir, `${profileName}.json`);
+	if (!existsSync(profileFile)) {
+		return null;
+	}
+
+	try {
+		return JSON.parse(readFileSync(profileFile, "utf-8"));
+	} catch (error) {
+		console.error(`Error loading profile ${profileName}:`, error);
+		return null;
+	}
+}
+
+/**
+ * List all available profiles in the profiles directory
+ */
+export function listProfiles(profilesDir: string): string[] {
+	if (!existsSync(profilesDir)) {
+		return [];
+	}
+
+	return readdirSync(profilesDir)
+		.filter((f) => f.endsWith(".json"))
+		.map((f) => f.replace(".json", ""));
+}
+
+/**
+ * Compare version strings (e.g., "9.5", "11", "14.2")
+ * Returns: negative if a < b, 0 if equal, positive if a > b
+ */
+function compareVersions(a: string, b: string): number {
+	const partsA = a.split(".").map(Number);
+	const partsB = b.split(".").map(Number);
+
+	const maxLen = Math.max(partsA.length, partsB.length);
+	for (let i = 0; i < maxLen; i++) {
+		const numA = partsA[i] || 0;
+		const numB = partsB[i] || 0;
+		if (numA !== numB) {
+			return numA - numB;
+		}
+	}
+	return 0;
+}
+
+/**
+ * Check if a rule is compatible with a profile
+ */
+export function isRuleCompatibleWithProfile(
+	rule: Rule,
+	profile: Profile,
+): boolean {
+	// Check version requirement
+	if (rule.minVersion) {
+		if (compareVersions(rule.minVersion, profile.minVersion) > 0) {
+			// Rule requires a higher version than profile supports
+			return false;
+		}
+		if (
+			profile.maxVersion &&
+			compareVersions(rule.minVersion, profile.maxVersion) > 0
+		) {
+			// Rule requires a version higher than profile's max
+			return false;
+		}
+	}
+
+	// Check extension requirements
+	if (rule.extensions && rule.extensions.length > 0) {
+		const allExtensions = [
+			...(profile.extensions.available || []),
+			...(profile.extensions.installable || []),
+		];
+
+		for (const ext of rule.extensions) {
+			if (profile.extensions.unavailable?.includes(ext)) {
+				// Extension is explicitly unavailable in this profile
+				return false;
+			}
+			if (!allExtensions.includes(ext)) {
+				// Extension is not available or installable
+				return false;
+			}
+		}
+	}
+
+	// Check if rule is explicitly excluded
+	if (profile.excludeRules?.includes(rule.id)) {
+		return false;
+	}
+
+	return true;
+}
+
+/**
+ * Filter rules based on profile constraints
+ */
+export function filterRulesForProfile(rules: Rule[], profile: Profile): Rule[] {
+	return rules.filter((rule) => isRuleCompatibleWithProfile(rule, profile));
+}

packages/skills-build/src/types.ts

@@ -26,6 +26,8 @@ export interface Rule {
 	references?: string[];
 	tags?: string[];
 	supabaseNotes?: string;
+	minVersion?: string; // Minimum PostgreSQL version required (e.g., "11", "14")
+	extensions?: string[]; // Required PostgreSQL extensions (e.g., ["pg_stat_statements"])
 }
 
 export interface Section {
@@ -57,3 +59,16 @@ export interface ValidationResult {
 	errors: string[];
 	warnings: string[];
 }
+
+export interface Profile {
+	name: string;
+	minVersion: string;
+	maxVersion?: string;
+	extensions: {
+		available: string[];
+		installable?: string[];
+		unavailable: string[];
+	};
+	excludeRules?: string[];
+	notes?: string;
+}