#!/usr/bin/env npx tsx
import * as fs from "fs";
import * as path from "path";
// Parse args
const args = process.argv.slice(2);
let directory: string | undefined;
let days: number | undefined;
for (let i = 0; i < args.length; i++) {
if (args[i] === "--dir" || args[i] === "-d") {
directory = args[++i];
} else if (args[i] === "--days" || args[i] === "-n") {
days = parseInt(args[++i], 10);
} else if (args[i] === "--help" || args[i] === "-h") {
console.log(`Usage: cost.ts -d <path> -n <days>
-d, --dir <path> Directory path (required)
-n, --days <num> Number of days to track (required)
-h, --help Show this help`);
process.exit(0);
}
}
if (!directory || !days) {
console.error("Error: both --dir and --days are required");
console.error("Run with --help for usage");
process.exit(1);
}
// Encode directory path to session folder name
function encodeSessionDir(dir: string): string {
// Remove leading slash, replace remaining slashes with dashes
const normalized = dir.startsWith("/") ? dir.slice(1) : dir;
return "--" + normalized.replace(/\//g, "-") + "--";
}
const sessionsBase = path.join(process.env.HOME!, ".pi/agent/sessions");
const encodedDir = encodeSessionDir(directory);
const sessionsDir = path.join(sessionsBase, encodedDir);
if (!fs.existsSync(sessionsDir)) {
console.error(`Sessions directory not found: ${sessionsDir}`);
process.exit(1);
}
// Get cutoff date
const cutoff = new Date();
cutoff.setDate(cutoff.getDate() - days);
cutoff.setHours(0, 0, 0, 0);
interface DayCost {
total: number;
input: number;
output: number;
cacheRead: number;
cacheWrite: number;
requests: number;
}
interface Stats {
[day: string]: {
[provider: string]: DayCost;
};
}
const stats: Stats = {};
// Process session files
const files = fs.readdirSync(sessionsDir).filter((f) => f.endsWith(".jsonl"));
for (const file of files) {
// Extract timestamp from filename: <timestamp>_<uuid>.jsonl
// Format: 2025-12-17T08-25-07-381Z (dashes instead of colons)
const timestamp = file.split("_")[0];
// Convert back to valid ISO: replace T08-25-07-381Z with T08:25:07.381Z
const isoTimestamp = timestamp.replace(/T(\d{2})-(\d{2})-(\d{2})-(\d{3})Z/, "T$1:$2:$3.$4Z");
const fileDate = new Date(isoTimestamp);
if (fileDate < cutoff) continue;
const filepath = path.join(sessionsDir, file);
const content = fs.readFileSync(filepath, "utf8");
const lines = content.trim().split("\n");
for (const line of lines) {
if (!line) continue;
try {
const entry = JSON.parse(line);
if (entry.type !== "message") continue;
if (entry.message?.role !== "assistant") continue;
if (!entry.message?.usage?.cost) continue;
const { provider, usage } = entry.message;
const { cost } = usage;
const entryDate = new Date(entry.timestamp);
const day = entryDate.toISOString().split("T")[0];
if (!stats[day]) stats[day] = {};
if (!stats[day][provider]) {
stats[day][provider] = {
total: 0,
input: 0,
output: 0,
cacheRead: 0,
cacheWrite: 0,
requests: 0,
};
}
stats[day][provider].total += cost.total || 0;
stats[day][provider].input += cost.input || 0;
stats[day][provider].output += cost.output || 0;
stats[day][provider].cacheRead += cost.cacheRead || 0;
stats[day][provider].cacheWrite += cost.cacheWrite || 0;
stats[day][provider].requests += 1;
} catch {
// Skip malformed lines
}
}
}
// Sort days and output
const sortedDays = Object.keys(stats).sort();
if (sortedDays.length === 0) {
console.log(`No sessions found in the last ${days} days for: ${directory}`);
process.exit(0);
}
console.log(`\nCost breakdown for: ${directory}`);
console.log(`Period: last ${days} days (since ${cutoff.toISOString().split("T")[0]})`);
console.log("=".repeat(80));
let grandTotal = 0;
const providerTotals: { [p: string]: DayCost } = {};
for (const day of sortedDays) {
console.log(`\n${day}`);
console.log("-".repeat(40));
let dayTotal = 0;
const providers = Object.keys(stats[day]).sort();
for (const provider of providers) {
const s = stats[day][provider];
dayTotal += s.total;
if (!providerTotals[provider]) {
providerTotals[provider] = { total: 0, input: 0, output: 0, cacheRead: 0, cacheWrite: 0, requests: 0 };
}
providerTotals[provider].total += s.total;
providerTotals[provider].input += s.input;
providerTotals[provider].output += s.output;
providerTotals[provider].cacheRead += s.cacheRead;
providerTotals[provider].cacheWrite += s.cacheWrite;
providerTotals[provider].requests += s.requests;
console.log(
` ${provider.padEnd(15)} $${s.total.toFixed(4).padStart(8)} (${s.requests} reqs, in: $${s.input.toFixed(4)}, out: $${s.output.toFixed(4)}, cache: $${(s.cacheRead + s.cacheWrite).toFixed(4)})`
);
}
console.log(` ${"Day total:".padEnd(15)} $${dayTotal.toFixed(4).padStart(8)}`);
grandTotal += dayTotal;
}
console.log("\n" + "=".repeat(80));
console.log("TOTALS BY PROVIDER");
console.log("-".repeat(40));
for (const provider of Object.keys(providerTotals).sort()) {
const t = providerTotals[provider];
console.log(
` ${provider.padEnd(15)} $${t.total.toFixed(4).padStart(8)} (${t.requests} reqs, in: $${t.input.toFixed(4)}, out: $${t.output.toFixed(4)}, cache: $${(t.cacheRead + t.cacheWrite).toFixed(4)})`
);
}
console.log("-".repeat(40));
console.log(` ${"GRAND TOTAL:".padEnd(15)} $${grandTotal.toFixed(4).padStart(8)}`);
console.log();