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import type { Argv } from "yargs"
import { cmd } from "./cmd"
import { Session } from "../../session"
import { bootstrap } from "../bootstrap"
import { Database } from "../../storage/db"
import { SessionTable } from "../../session/session.sql"
import { Project } from "../../project/project"
import { Instance } from "../../project/instance"
interface SessionStats {
totalSessions: number
totalMessages: number
totalCost: number
totalTokens: {
input: number
output: number
reasoning: number
cache: {
read: number
write: number
}
}
toolUsage: Record<string, number>
modelUsage: Record<
string,
{
messages: number
tokens: {
input: number
output: number
cache: {
read: number
write: number
}
}
cost: number
}
>
dateRange: {
earliest: number
latest: number
}
days: number
costPerDay: number
tokensPerSession: number
medianTokensPerSession: number
}
export const StatsCommand = cmd({
command: "stats",
describe: "show token usage and cost statistics",
builder: (yargs: Argv) => {
return yargs
.option("days", {
describe: "show stats for the last N days (default: all time)",
type: "number",
})
.option("tools", {
describe: "number of tools to show (default: all)",
type: "number",
})
.option("models", {
describe: "show model statistics (default: hidden). Pass a number to show top N, otherwise shows all",
})
.option("project", {
describe: "filter by project (default: all projects, empty string: current project)",
type: "string",
})
},
handler: async (args) => {
await bootstrap(process.cwd(), async () => {
const stats = await aggregateSessionStats(args.days, args.project)
let modelLimit: number | undefined
if (args.models === true) {
modelLimit = Infinity
} else if (typeof args.models === "number") {
modelLimit = args.models
}
displayStats(stats, args.tools, modelLimit)
})
},
})
async function getCurrentProject(): Promise<Project.Info> {
return Instance.project
}
async function getAllSessions(): Promise<Session.Info[]> {
const rows = Database.use((db) => db.select().from(SessionTable).all())
return rows.map((row) => Session.fromRow(row))
}
export async function aggregateSessionStats(days?: number, projectFilter?: string): Promise<SessionStats> {
const sessions = await getAllSessions()
const MS_IN_DAY = 24 * 60 * 60 * 1000
const cutoffTime = (() => {
if (days === undefined) return 0
if (days === 0) {
const now = new Date()
now.setHours(0, 0, 0, 0)
return now.getTime()
}
return Date.now() - days * MS_IN_DAY
})()
const windowDays = (() => {
if (days === undefined) return
if (days === 0) return 1
return days
})()
let filteredSessions = cutoffTime > 0 ? sessions.filter((session) => session.time.updated >= cutoffTime) : sessions
if (projectFilter !== undefined) {
if (projectFilter === "") {
const currentProject = await getCurrentProject()
filteredSessions = filteredSessions.filter((session) => session.projectID === currentProject.id)
} else {
filteredSessions = filteredSessions.filter((session) => session.projectID === projectFilter)
}
}
const stats: SessionStats = {
totalSessions: filteredSessions.length,
totalMessages: 0,
totalCost: 0,
totalTokens: {
input: 0,
output: 0,
reasoning: 0,
cache: {
read: 0,
write: 0,
},
},
toolUsage: {},
modelUsage: {},
dateRange: {
earliest: Date.now(),
latest: Date.now(),
},
days: 0,
costPerDay: 0,
tokensPerSession: 0,
medianTokensPerSession: 0,
}
if (filteredSessions.length > 1000) {
console.log(`Large dataset detected (${filteredSessions.length} sessions). This may take a while...`)
}
if (filteredSessions.length === 0) {
stats.days = windowDays ?? 0
return stats
}
let earliestTime = Date.now()
let latestTime = 0
const sessionTotalTokens: number[] = []
const BATCH_SIZE = 20
for (let i = 0; i < filteredSessions.length; i += BATCH_SIZE) {
const batch = filteredSessions.slice(i, i + BATCH_SIZE)
const batchPromises = batch.map(async (session) => {
const messages = await Session.messages({ sessionID: session.id })
let sessionCost = 0
let sessionTokens = { input: 0, output: 0, reasoning: 0, cache: { read: 0, write: 0 } }
let sessionToolUsage: Record<string, number> = {}
let sessionModelUsage: Record<
string,
{
messages: number
tokens: {
input: number
output: number
cache: {
read: number
write: number
}
}
cost: number
}
> = {}
for (const message of messages) {
if (message.info.role === "assistant") {
sessionCost += message.info.cost || 0
const modelKey = `${message.info.providerID}/${message.info.modelID}`
if (!sessionModelUsage[modelKey]) {
sessionModelUsage[modelKey] = {
messages: 0,
tokens: { input: 0, output: 0, cache: { read: 0, write: 0 } },
cost: 0,
}
}
sessionModelUsage[modelKey].messages++
sessionModelUsage[modelKey].cost += message.info.cost || 0
if (message.info.tokens) {
sessionTokens.input += message.info.tokens.input || 0
sessionTokens.output += message.info.tokens.output || 0
sessionTokens.reasoning += message.info.tokens.reasoning || 0
sessionTokens.cache.read += message.info.tokens.cache?.read || 0
sessionTokens.cache.write += message.info.tokens.cache?.write || 0
sessionModelUsage[modelKey].tokens.input += message.info.tokens.input || 0
sessionModelUsage[modelKey].tokens.output +=
(message.info.tokens.output || 0) + (message.info.tokens.reasoning || 0)
sessionModelUsage[modelKey].tokens.cache.read += message.info.tokens.cache?.read || 0
sessionModelUsage[modelKey].tokens.cache.write += message.info.tokens.cache?.write || 0
}
}
for (const part of message.parts) {
if (part.type === "tool" && part.tool) {
sessionToolUsage[part.tool] = (sessionToolUsage[part.tool] || 0) + 1
}
}
}
return {
messageCount: messages.length,
sessionCost,
sessionTokens,
sessionTotalTokens:
sessionTokens.input +
sessionTokens.output +
sessionTokens.reasoning +
sessionTokens.cache.read +
sessionTokens.cache.write,
sessionToolUsage,
sessionModelUsage,
earliestTime: cutoffTime > 0 ? session.time.updated : session.time.created,
latestTime: session.time.updated,
}
})
const batchResults = await Promise.all(batchPromises)
for (const result of batchResults) {
earliestTime = Math.min(earliestTime, result.earliestTime)
latestTime = Math.max(latestTime, result.latestTime)
sessionTotalTokens.push(result.sessionTotalTokens)
stats.totalMessages += result.messageCount
stats.totalCost += result.sessionCost
stats.totalTokens.input += result.sessionTokens.input
stats.totalTokens.output += result.sessionTokens.output
stats.totalTokens.reasoning += result.sessionTokens.reasoning
stats.totalTokens.cache.read += result.sessionTokens.cache.read
stats.totalTokens.cache.write += result.sessionTokens.cache.write
for (const [tool, count] of Object.entries(result.sessionToolUsage)) {
stats.toolUsage[tool] = (stats.toolUsage[tool] || 0) + count
}
for (const [model, usage] of Object.entries(result.sessionModelUsage)) {
if (!stats.modelUsage[model]) {
stats.modelUsage[model] = {
messages: 0,
tokens: { input: 0, output: 0, cache: { read: 0, write: 0 } },
cost: 0,
}
}
stats.modelUsage[model].messages += usage.messages
stats.modelUsage[model].tokens.input += usage.tokens.input
stats.modelUsage[model].tokens.output += usage.tokens.output
stats.modelUsage[model].tokens.cache.read += usage.tokens.cache.read
stats.modelUsage[model].tokens.cache.write += usage.tokens.cache.write
stats.modelUsage[model].cost += usage.cost
}
}
}
const rangeDays = Math.max(1, Math.ceil((latestTime - earliestTime) / MS_IN_DAY))
const effectiveDays = windowDays ?? rangeDays
stats.dateRange = {
earliest: earliestTime,
latest: latestTime,
}
stats.days = effectiveDays
stats.costPerDay = stats.totalCost / effectiveDays
const totalTokens =
stats.totalTokens.input +
stats.totalTokens.output +
stats.totalTokens.reasoning +
stats.totalTokens.cache.read +
stats.totalTokens.cache.write
stats.tokensPerSession = filteredSessions.length > 0 ? totalTokens / filteredSessions.length : 0
sessionTotalTokens.sort((a, b) => a - b)
const mid = Math.floor(sessionTotalTokens.length / 2)
stats.medianTokensPerSession =
sessionTotalTokens.length === 0
? 0
: sessionTotalTokens.length % 2 === 0
? (sessionTotalTokens[mid - 1] + sessionTotalTokens[mid]) / 2
: sessionTotalTokens[mid]
return stats
}
export function displayStats(stats: SessionStats, toolLimit?: number, modelLimit?: number) {
const width = 56
function renderRow(label: string, value: string): string {
const availableWidth = width - 1
const paddingNeeded = availableWidth - label.length - value.length
const padding = Math.max(0, paddingNeeded)
return `│${label}${" ".repeat(padding)}${value} │`
}
// Overview section
console.log("┌────────────────────────────────────────────────────────┐")
console.log("│ OVERVIEW │")
console.log("├────────────────────────────────────────────────────────┤")
console.log(renderRow("Sessions", stats.totalSessions.toLocaleString()))
console.log(renderRow("Messages", stats.totalMessages.toLocaleString()))
console.log(renderRow("Days", stats.days.toString()))
console.log("└────────────────────────────────────────────────────────┘")
console.log()
// Cost & Tokens section
console.log("┌────────────────────────────────────────────────────────┐")
console.log("│ COST & TOKENS │")
console.log("├────────────────────────────────────────────────────────┤")
const cost = isNaN(stats.totalCost) ? 0 : stats.totalCost
const costPerDay = isNaN(stats.costPerDay) ? 0 : stats.costPerDay
const tokensPerSession = isNaN(stats.tokensPerSession) ? 0 : stats.tokensPerSession
console.log(renderRow("Total Cost", `$${cost.toFixed(2)}`))
console.log(renderRow("Avg Cost/Day", `$${costPerDay.toFixed(2)}`))
console.log(renderRow("Avg Tokens/Session", formatNumber(Math.round(tokensPerSession))))
const medianTokensPerSession = isNaN(stats.medianTokensPerSession) ? 0 : stats.medianTokensPerSession
console.log(renderRow("Median Tokens/Session", formatNumber(Math.round(medianTokensPerSession))))
console.log(renderRow("Input", formatNumber(stats.totalTokens.input)))
console.log(renderRow("Output", formatNumber(stats.totalTokens.output)))
console.log(renderRow("Cache Read", formatNumber(stats.totalTokens.cache.read)))
console.log(renderRow("Cache Write", formatNumber(stats.totalTokens.cache.write)))
console.log("└────────────────────────────────────────────────────────┘")
console.log()
// Model Usage section
if (modelLimit !== undefined && Object.keys(stats.modelUsage).length > 0) {
const sortedModels = Object.entries(stats.modelUsage).sort(([, a], [, b]) => b.messages - a.messages)
const modelsToDisplay = modelLimit === Infinity ? sortedModels : sortedModels.slice(0, modelLimit)
console.log("┌────────────────────────────────────────────────────────┐")
console.log("│ MODEL USAGE │")
console.log("├────────────────────────────────────────────────────────┤")
for (const [model, usage] of modelsToDisplay) {
console.log(`│ ${model.padEnd(54)} │`)
console.log(renderRow(" Messages", usage.messages.toLocaleString()))
console.log(renderRow(" Input Tokens", formatNumber(usage.tokens.input)))
console.log(renderRow(" Output Tokens", formatNumber(usage.tokens.output)))
console.log(renderRow(" Cache Read", formatNumber(usage.tokens.cache.read)))
console.log(renderRow(" Cache Write", formatNumber(usage.tokens.cache.write)))
console.log(renderRow(" Cost", `$${usage.cost.toFixed(4)}`))
console.log("├────────────────────────────────────────────────────────┤")
}
// Remove last separator and add bottom border
process.stdout.write("\x1B[1A") // Move up one line
console.log("└────────────────────────────────────────────────────────┘")
}
console.log()
// Tool Usage section
if (Object.keys(stats.toolUsage).length > 0) {
const sortedTools = Object.entries(stats.toolUsage).sort(([, a], [, b]) => b - a)
const toolsToDisplay = toolLimit ? sortedTools.slice(0, toolLimit) : sortedTools
console.log("┌────────────────────────────────────────────────────────┐")
console.log("│ TOOL USAGE │")
console.log("├────────────────────────────────────────────────────────┤")
const maxCount = Math.max(...toolsToDisplay.map(([, count]) => count))
const totalToolUsage = Object.values(stats.toolUsage).reduce((a, b) => a + b, 0)
for (const [tool, count] of toolsToDisplay) {
const barLength = Math.max(1, Math.floor((count / maxCount) * 20))
const bar = "█".repeat(barLength)
const percentage = ((count / totalToolUsage) * 100).toFixed(1)
const maxToolLength = 18
const truncatedTool = tool.length > maxToolLength ? tool.substring(0, maxToolLength - 2) + ".." : tool
const toolName = truncatedTool.padEnd(maxToolLength)
const content = ` ${toolName} ${bar.padEnd(20)} ${count.toString().padStart(3)} (${percentage.padStart(4)}%)`
const padding = Math.max(0, width - content.length - 1)
console.log(`│${content}${" ".repeat(padding)} │`)
}
console.log("└────────────────────────────────────────────────────────┘")
}
console.log()
}
function formatNumber(num: number): string {
if (num >= 1000000) {
return (num / 1000000).toFixed(1) + "M"
} else if (num >= 1000) {
return (num / 1000).toFixed(1) + "K"
}
return num.toString()
}