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#1	/**
#2	* Skills Loader
#3	*
#4	* Discovers and loads SKILL.md files from ~/.automaton/skills/
#5	* Each skill is a directory containing a SKILL.md file with
#6	* YAML frontmatter + Markdown instructions.
#7	*/
#8
#9	import fs from "fs";
#10	import path from "path";
#11	import type { Skill, AutomatonDatabase } from "../types.js";
#12	import { parseSkillMd } from "./format.js";
#13
#14	/**
#15	* Scan the skills directory and load all valid SKILL.md files.
#16	* Returns loaded skills and syncs them to the database.
#17	*/
#18	export function loadSkills(
#19	skillsDir: string,
#20	db: AutomatonDatabase,
#21	): Skill[] {
#22	const resolvedDir = resolveHome(skillsDir);
#23
#24	if (!fs.existsSync(resolvedDir)) {
#25	return db.getSkills(true);
#26	}
#27
#28	const entries = fs.readdirSync(resolvedDir, { withFileTypes: true });
#29	const loaded: Skill[] = [];
#30
#31	for (const entry of entries) {
#32	if (!entry.isDirectory()) continue;
#33
#34	const skillMdPath = path.join(resolvedDir, entry.name, "SKILL.md");
#35	if (!fs.existsSync(skillMdPath)) continue;
#36
#37	try {
#38	const content = fs.readFileSync(skillMdPath, "utf-8");
#39	const skill = parseSkillMd(content, skillMdPath);
#40	if (!skill) continue;
#41
#42	// Check requirements
#43	if (!checkRequirements(skill)) {
#44	continue;
#45	}
#46
#47	// Check if already in DB and preserve enabled state
#48	const existing = db.getSkillByName(skill.name);
#49	if (existing) {
#50	skill.enabled = existing.enabled;
#51	skill.installedAt = existing.installedAt;
#52	}
#53
#54	db.upsertSkill(skill);
#55	loaded.push(skill);
#56	} catch {
#57	// Skip invalid skill files
#58	}
#59	}
#60
#61	// Return all enabled skills (includes DB-only skills not on disk)
#62	return db.getSkills(true);
#63	}
#64
#65	/**
#66	* Check if a skill's requirements are met.
#67	*/
#68	function checkRequirements(skill: Skill): boolean {
#69	if (!skill.requires) return true;
#70
#71	// Check required binaries
#72	if (skill.requires.bins) {
#73	for (const bin of skill.requires.bins) {
#74	try {
#75	const { execSync } = require("child_process");
#76	execSync(`which ${bin}`, { stdio: "ignore" });
#77	} catch {
#78	return false;
#79	}
#80	}
#81	}
#82
#83	// Check required environment variables
#84	if (skill.requires.env) {
#85	for (const envVar of skill.requires.env) {
#86	if (!process.env[envVar]) {
#87	return false;
#88	}
#89	}
#90	}
#91
#92	return true;
#93	}
#94
#95	/**
#96	* Get the active skill instructions to inject into the system prompt.
#97	* Only returns instructions from auto-activate skills that are enabled.
#98	*/
#99	export function getActiveSkillInstructions(skills: Skill[]): string {
#100	const active = skills.filter((s) => s.enabled && s.autoActivate);
#101	if (active.length === 0) return "";
#102
#103	const sections = active.map(
#104	(s) =>
#105	`--- SKILL: ${s.name} ---\n${s.description ? `${s.description}\n\n` : ""}${s.instructions}\n--- END SKILL: ${s.name} ---`,
#106	);
#107
#108	return sections.join("\n\n");
#109	}
#110
#111	function resolveHome(p: string): string {
#112	if (p.startsWith("~")) {
#113	return path.join(process.env.HOME \|\| "/root", p.slice(1));
#114	}
#115	return p;
#116	}
#117

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