import * as fs from "node:fs";

import * as path from "node:path";

import { getWolfDir, ensureWolfDir, writeJSON, appendMarkdown, readJSON, timestamp, timeShort } from "./shared.js";

async function main() {

ensureWolfDir();

const wolfDir = getWolfDir();

// Clean up stale .tmp files left from failed atomic writes

try {

const files = fs.readdirSync(wolfDir);

for (const f of files) {

if (f.endsWith(".tmp")) {

try {

fs.unlinkSync(path.join(wolfDir, f));

}

catch { }

}

}

}

catch { }

const hooksDir = path.join(wolfDir, "hooks");

const sessionFile = path.join(hooksDir, "_session.json");

const now = new Date();

const sessionId = `session-${now.toISOString().slice(0, 10)}-${String(now.getHours()).padStart(2, "0")}${String(now.getMinutes()).padStart(2, "0")}`;

// Create fresh session state

writeJSON(sessionFile, {

session_id: sessionId,

started: timestamp(),

files_read: {},

files_written: [],

edit_counts: {},

anatomy_hits: 0,

anatomy_misses: 0,

repeated_reads_warned: 0,

cerebrum_warnings: 0,

stop_count: 0,

});

// Append session header to memory.md

const memoryPath = path.join(wolfDir, "memory.md");

const header = `\n## Session: ${now.toISOString().slice(0, 10)} ${timeShort()}\n\n| Time | Action | File(s) | Outcome | ~Tokens |\n|------|--------|---------|---------|--------|\n`;

appendMarkdown(memoryPath, header);

// Check cerebrum freshness — remind Claude to learn

try {

const cerebrumPath = path.join(wolfDir, "cerebrum.md");

const cerebrumContent = fs.readFileSync(cerebrumPath, "utf-8");

const stat = fs.statSync(cerebrumPath);

const daysSinceUpdate = (Date.now() - stat.mtimeMs) / (1000 * 60 * 60 * 24);

// Count actual entries (non-comment, non-empty lines in content sections)

const entryLines = cerebrumContent.split("\n").filter(l => {

const t = l.trim();

return t.startsWith("- ") || t.startsWith("* ") || (t.startsWith("[") && t.includes("]"));

});

if (entryLines.length < 3) {

process.stderr.write(`💡 OpenWolf: cerebrum.md has only ${entryLines.length} entries. Learn from this session — record user preferences, project conventions, and mistakes to .wolf/cerebrum.md.\n`);

}

else if (daysSinceUpdate > 3) {

process.stderr.write(`💡 OpenWolf: cerebrum.md hasn't been updated in ${Math.floor(daysSinceUpdate)} days. Look for opportunities to add learnings this session.\n`);

}

}

catch { }

// Check buglog — remind if empty

try {

const buglogPath = path.join(wolfDir, "buglog.json");

const buglog = readJSON(buglogPath, { bugs: [] });

if (buglog.bugs.length === 0) {

process.stderr.write(`📋 OpenWolf: buglog.json is empty. If you encounter or fix any bugs, errors, or failed tests this session, log them to .wolf/buglog.json.\n`);

}

}

catch { }

// Increment total_sessions in token-ledger

const ledgerPath = path.join(wolfDir, "token-ledger.json");

const ledger = readJSON(ledgerPath, { version: 1, lifetime: { total_sessions: 0 } });

ledger.lifetime.total_sessions++;

writeJSON(ledgerPath, ledger);

process.exit(0);

}

main().catch(() => process.exit(0));

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