codeburn/src/context-tree.ts
iamtoruk 53c5c7b370 feat(dock): glance popover with hero window, sessions and today strip
The Capacity Dock hover panel becomes a glance: a provider header, the
sessions running right now as pills with their context rings, a Today
strip, and a row of quota-window percentages, separated by hairlines.
Window percentages stay plain text until 70 percent so a healthy row
reads as text rather than a wall of colour. The panel stays 350pt wide;
every block height is a whole point and is summed into the panel frame,
since the hosting view does not size itself.

Running sessions are new CLI surface. `liveSessions` is add-only on the
menubar payload: sessions whose transcript was appended inside a 120s
window, carrying the branch, the model that answered last, and the
context that turn reported. Absence means "unknown", so the section
hides rather than claiming nothing is running. The block names projects
and branches, so sharing and MCP output strip it.

Today's totals needed no CLI change; the app simply was not decoding the
cache token counts the payload already carried.
2026-09-02 06:09:06 -07:00

747 lines
28 KiB
TypeScript

import { open, readdir, stat } from 'fs/promises'
import { existsSync } from 'fs'
import { delimiter, join } from 'path'
import { homedir } from 'os'
import chalk from 'chalk'
import { readSessionLines, type SessionLine } from './fs-utils.js'
import { formatTokens } from './format.js'
import { estimateTokensFromChars } from './token-estimate.js'
// Block token counts are chars/4 estimates; the "context (exact)" line comes
// from the last assistant message's API usage. Transcripts store thinking
// blocks with their text stripped, so reasoning is derived per message as
// output_tokens minus the estimated visible output.
export const IMAGE_TOKEN_FALLBACK = 1600
export type BlockStat = { count: number; tokens: number }
export type ContextSnapshot = {
messages: number
tokens: number
assistant: {
count: number
tokens: number
text: BlockStat
reasoning: BlockStat
toolCall: BlockStat
byTool: Array<{ tool: string; count: number; tokens: number }>
}
user: {
count: number
tokens: number
text: BlockStat
image: BlockStat
compactSummary: BlockStat
meta: BlockStat
}
toolResult: BlockStat
system: BlockStat
}
export type SessionRef = {
filePath: string
sessionId: string
project: string
mtimeMs: number
sizeBytes: number
}
export type ContextTreeResult = {
session: SessionRef
model: string
compactions: number
reported: { context: number; window: number | null } | null
effective: ContextSnapshot
full: ContextSnapshot
}
// A single line above this decodes to a string near V8's limit; skip it
// instead of letting toString abort the whole walk.
const MAX_LINE_BYTES = 256 * 1024 * 1024
export function lineToText(line: SessionLine): string | null {
if (typeof line === 'string') return line
if (line.length > MAX_LINE_BYTES) return null
try {
return line.toString('utf-8')
} catch {
return null
}
}
export type Acc = {
messages: number
assistantCount: number
assistantText: BlockStat
assistantReasoning: BlockStat
toolCall: BlockStat
byTool: Map<string, BlockStat>
userCount: number
userText: BlockStat
userImage: BlockStat
userCompactSummary: BlockStat
userMeta: BlockStat
toolResult: BlockStat
system: BlockStat
}
type RawUsage = {
input_tokens?: number
output_tokens?: number
cache_creation_input_tokens?: number
cache_read_input_tokens?: number
}
type RawEntry = {
type?: string
subtype?: string
uuid?: string
isSidechain?: boolean
isMeta?: boolean
isCompactSummary?: boolean
content?: unknown
attachment?: unknown
compactMetadata?: { preTokens?: number; preservedSegment?: { headUuid?: string } }
message?: {
id?: string
role?: string
model?: string
content?: unknown
usage?: RawUsage
}
}
// Streamed assistant messages arrive as several transcript entries sharing one
// message id. Reasoning can only be settled once the whole message has been
// seen, so per-message state is buffered here and flushed at end of file.
type PendingAssistant = {
effective: boolean
visibleEstTokens: number
thinkingCount: number
outputTokens: number
}
function newBlockStat(): BlockStat {
return { count: 0, tokens: 0 }
}
export function newAcc(): Acc {
return {
messages: 0,
assistantCount: 0,
assistantText: newBlockStat(),
assistantReasoning: newBlockStat(),
toolCall: newBlockStat(),
byTool: new Map(),
userCount: 0,
userText: newBlockStat(),
userImage: newBlockStat(),
userCompactSummary: newBlockStat(),
userMeta: newBlockStat(),
toolResult: newBlockStat(),
system: newBlockStat(),
}
}
export function estimateTokens(text: string): number {
return estimateTokensFromChars(text.length)
}
export function add(stat: BlockStat, tokens: number): void {
stat.count += 1
stat.tokens += tokens
}
// Injected harness content (slash-command wrappers, system reminders, hook
// output) rather than something the user typed.
const META_TEXT_RE = /^\s*<(command-name|command-message|command-args|command-contents|local-command-stdout|local-command-stderr|system-reminder|task-notification)/
function pngDims(buf: Buffer): [number, number] | null {
if (buf.length < 24 || buf.readUInt32BE(0) !== 0x89504e47) return null
return [buf.readUInt32BE(16), buf.readUInt32BE(20)]
}
function jpegDims(buf: Buffer): [number, number] | null {
if (buf.length < 4 || buf[0] !== 0xff || buf[1] !== 0xd8) return null
let i = 2
while (i + 9 < buf.length) {
if (buf[i] !== 0xff) {
i++
continue
}
const marker = buf[i + 1]
const isSof = marker >= 0xc0 && marker <= 0xcf && marker !== 0xc4 && marker !== 0xc8 && marker !== 0xcc
if (isSof) return [buf.readUInt16BE(i + 7), buf.readUInt16BE(i + 5)]
const len = buf.readUInt16BE(i + 2)
if (len < 2) return null
i += 2 + len
}
return null
}
// Anthropic vision pricing: ~(w*h)/750 tokens after the API downscales to fit
// 1568px on the long edge / ~1.15MP total.
function imageTokens(source: unknown): number {
const data = (source as { data?: unknown } | undefined)?.data
if (typeof data !== 'string' || data.length === 0) return IMAGE_TOKEN_FALLBACK
let buf: Buffer
try {
buf = Buffer.from(data.slice(0, 262144), 'base64')
} catch {
return IMAGE_TOKEN_FALLBACK
}
const dims = pngDims(buf) ?? jpegDims(buf)
if (!dims) return IMAGE_TOKEN_FALLBACK
const [w, h] = dims
if (!(w > 0) || !(h > 0)) return IMAGE_TOKEN_FALLBACK
const scale = Math.min(1, 1568 / Math.max(w, h), Math.sqrt(1_150_000 / (w * h)))
return Math.max(1, Math.min(IMAGE_TOKEN_FALLBACK, Math.round((w * scale * h * scale) / 750)))
}
function toolResultTokens(content: unknown): number {
if (typeof content === 'string') return estimateTokens(content)
if (!Array.isArray(content)) return 0
let tokens = 0
for (const block of content) {
if (block == null || typeof block !== 'object') continue
const b = block as { type?: string; text?: unknown; source?: unknown }
if (b.type === 'text' && typeof b.text === 'string') tokens += estimateTokens(b.text)
else if (b.type === 'image') tokens += imageTokens(b.source)
}
return tokens
}
class TreeBuilder {
full = newAcc()
effective = newAcc()
pending = new Map<string, PendingAssistant>()
model = 'unknown'
lastUsage: RawUsage | null = null
maxSeenTokens = 0
private accs(effective: boolean): Acc[] {
return effective ? [this.full, this.effective] : [this.full]
}
addEntry(entry: RawEntry, effective: boolean): void {
const role = entry.message?.role
if (entry.type === 'assistant' && role === 'assistant') {
this.addAssistant(entry, effective)
} else if (entry.type === 'user' && role === 'user') {
this.addUser(entry, effective)
} else if (entry.type === 'system') {
const tokens = typeof entry.content === 'string' ? estimateTokens(entry.content) : 0
for (const acc of this.accs(effective)) add(acc.system, tokens)
} else if (entry.type === 'attachment') {
let tokens = 0
try {
tokens = entry.attachment == null ? 0 : estimateTokens(JSON.stringify(entry.attachment))
} catch {
tokens = 0
}
for (const acc of this.accs(effective)) add(acc.userMeta, tokens)
}
}
private addAssistant(entry: RawEntry, effective: boolean): void {
const msg = entry.message
if (!msg) return
if (typeof msg.model === 'string' && msg.model && msg.model !== '<synthetic>') this.model = msg.model
const usage = msg.usage
if (usage && ((usage.input_tokens ?? 0) > 0 || (usage.cache_read_input_tokens ?? 0) > 0)) {
this.lastUsage = usage
}
const id = msg.id ?? entry.uuid ?? ''
let pending = this.pending.get(id)
if (!pending) {
pending = { effective, visibleEstTokens: 0, thinkingCount: 0, outputTokens: 0 }
this.pending.set(id, pending)
for (const acc of this.accs(effective)) {
acc.assistantCount += 1
acc.messages += 1
}
}
if (usage?.output_tokens !== undefined) pending.outputTokens = usage.output_tokens
const content = msg.content
if (!Array.isArray(content)) return
for (const block of content) {
if (block == null || typeof block !== 'object') continue
const b = block as { type?: string; text?: unknown; name?: unknown; input?: unknown; content?: unknown }
if (b.type === 'text' && typeof b.text === 'string') {
const tokens = estimateTokens(b.text)
pending.visibleEstTokens += tokens
for (const acc of this.accs(pending.effective)) add(acc.assistantText, tokens)
} else if (b.type === 'thinking' || b.type === 'redacted_thinking') {
pending.thinkingCount += 1
} else if (b.type === 'tool_use' || b.type === 'server_tool_use') {
let tokens = 0
try {
tokens = estimateTokens(JSON.stringify(b.input ?? {}))
} catch {
tokens = 0
}
pending.visibleEstTokens += tokens
const tool = typeof b.name === 'string' && b.name ? b.name : 'unknown'
for (const acc of this.accs(pending.effective)) {
add(acc.toolCall, tokens)
const stat = acc.byTool.get(tool) ?? newBlockStat()
add(stat, tokens)
acc.byTool.set(tool, stat)
}
} else if (b.type === 'web_search_tool_result' || b.type === 'web_fetch_tool_result') {
for (const acc of this.accs(pending.effective)) add(acc.toolResult, toolResultTokens(b.content))
}
}
}
private addUser(entry: RawEntry, effective: boolean): void {
for (const acc of this.accs(effective)) {
acc.userCount += 1
acc.messages += 1
}
const content = entry.message?.content
const bucketFor = (acc: Acc, text: string): BlockStat => {
if (entry.isCompactSummary) return acc.userCompactSummary
if (entry.isMeta || META_TEXT_RE.test(text)) return acc.userMeta
return acc.userText
}
if (typeof content === 'string') {
for (const acc of this.accs(effective)) add(bucketFor(acc, content), estimateTokens(content))
return
}
if (!Array.isArray(content)) return
for (const block of content) {
if (block == null || typeof block !== 'object') continue
const b = block as { type?: string; text?: unknown; source?: unknown; content?: unknown }
if (b.type === 'text' && typeof b.text === 'string') {
for (const acc of this.accs(effective)) add(bucketFor(acc, b.text), estimateTokens(b.text))
} else if (b.type === 'image') {
const tokens = imageTokens(b.source)
for (const acc of this.accs(effective)) add(acc.userImage, tokens)
} else if (b.type === 'tool_result') {
const tokens = toolResultTokens(b.content)
for (const acc of this.accs(effective)) add(acc.toolResult, tokens)
}
}
}
// Transcripts strip thinking text, so estimate reasoning as the message's
// output_tokens minus its estimated visible output. Only messages that
// actually contained thinking blocks get a reasoning row; the remainder for
// other messages is chars/4 drift, not reasoning.
flushReasoning(): void {
for (const pending of this.pending.values()) {
if (pending.thinkingCount === 0) continue
const tokens = Math.max(0, pending.outputTokens - pending.visibleEstTokens)
for (const acc of this.accs(pending.effective)) {
acc.assistantReasoning.count += pending.thinkingCount
acc.assistantReasoning.tokens += tokens
}
}
}
}
export function snapshot(acc: Acc): ContextSnapshot {
const assistantTokens = acc.assistantText.tokens + acc.assistantReasoning.tokens + acc.toolCall.tokens
const userTokens = acc.userText.tokens + acc.userImage.tokens + acc.userCompactSummary.tokens + acc.userMeta.tokens
const byTool = [...acc.byTool.entries()]
.map(([tool, stat]) => ({ tool, count: stat.count, tokens: stat.tokens }))
.sort((a, b) => b.tokens - a.tokens)
return {
messages: acc.messages,
tokens: assistantTokens + userTokens + acc.toolResult.tokens + acc.system.tokens,
assistant: {
count: acc.assistantCount,
tokens: assistantTokens,
text: acc.assistantText,
reasoning: acc.assistantReasoning,
toolCall: acc.toolCall,
byTool,
},
user: {
count: acc.userCount,
tokens: userTokens,
text: acc.userText,
image: acc.userImage,
compactSummary: acc.userCompactSummary,
meta: acc.userMeta,
},
toolResult: acc.toolResult,
system: acc.system,
}
}
const skipFileSnapshots = (head: string): boolean => head.includes('"type":"file-history-snapshot"')
// Pass 1: locate the last compaction. The live window starts at the preserved
// segment's head (messages Claude Code carried across the compaction), not at
// the boundary itself.
async function findLastBoundary(filePath: string): Promise<{
headUuid: string | null
compactions: number
maxPreTokens: number
}> {
let headUuid: string | null = null
let compactions = 0
let maxPreTokens = 0
for await (const line of readSessionLines(filePath, skipFileSnapshots, { largeLineAsBuffer: true })) {
if (typeof line !== 'string') continue
if (!line.includes('"subtype":"compact_boundary"')) continue
let entry: RawEntry
try {
entry = JSON.parse(line) as RawEntry
} catch {
continue
}
if (entry.type !== 'system' || entry.subtype !== 'compact_boundary') continue
compactions += 1
headUuid = entry.compactMetadata?.preservedSegment?.headUuid ?? null
maxPreTokens = Math.max(maxPreTokens, entry.compactMetadata?.preTokens ?? 0)
}
return { headUuid, compactions, maxPreTokens }
}
// Claude models with a 1M window: opus-4-8 (auto-compactions on disk show
// ~1.0M preTokens) and the "[1m]" long-context variants. Others default to
// 200K unless the session itself proves bigger.
const MILLION_WINDOW_RE = /opus-4-8|\[1m\]/
export function reportedContextWindow(model: string, maxSeenTokens: number): number {
return MILLION_WINDOW_RE.test(model) || maxSeenTokens > 220_000 ? 1_000_000 : 200_000
}
export async function buildContextTree(session: SessionRef): Promise<ContextTreeResult> {
const boundary = await findLastBoundary(session.filePath)
const builder = new TreeBuilder()
builder.maxSeenTokens = boundary.maxPreTokens
let boundariesSeen = 0
let inPreservedSegment = false
for await (const line of readSessionLines(session.filePath, skipFileSnapshots, { largeLineAsBuffer: true })) {
const text = lineToText(line)
if (!text || text.charCodeAt(0) !== 123) continue
let entry: RawEntry
try {
entry = JSON.parse(text) as RawEntry
} catch {
continue
}
if (entry.isSidechain === true) continue
if (entry.type === 'system' && entry.subtype === 'compact_boundary') {
boundariesSeen += 1
continue
}
if (boundary.headUuid && entry.uuid === boundary.headUuid) inPreservedSegment = true
const effective = boundariesSeen >= boundary.compactions || inPreservedSegment
builder.addEntry(entry, effective)
}
builder.flushReasoning()
let reported: ContextTreeResult['reported'] = null
if (builder.lastUsage) {
const context =
(builder.lastUsage.input_tokens ?? 0) +
(builder.lastUsage.cache_read_input_tokens ?? 0) +
(builder.lastUsage.cache_creation_input_tokens ?? 0) +
(builder.lastUsage.output_tokens ?? 0)
builder.maxSeenTokens = Math.max(builder.maxSeenTokens, context)
reported = { context, window: reportedContextWindow(builder.model, builder.maxSeenTokens) }
}
return {
session,
model: builder.model,
compactions: boundary.compactions,
reported,
effective: snapshot(builder.effective),
full: snapshot(builder.full),
}
}
// Mirrors the env handling of providers/claude.ts so the context views cover
// the same session roots as usage tracking.
function claudeProjectRoots(): string[] {
const dirsEnv = process.env['CLAUDE_CONFIG_DIRS']
const dirs = dirsEnv ? dirsEnv.split(delimiter).filter(Boolean) : [process.env['CLAUDE_CONFIG_DIR'] ?? join(homedir(), '.claude')]
return dirs.map((d) => join(d, 'projects'))
}
type SessionFile = { filePath: string; sessionId: string; project: string }
async function listSessionFiles(): Promise<SessionFile[]> {
const files: SessionFile[] = []
for (const root of claudeProjectRoots()) {
if (!existsSync(root)) continue
let projectDirs: string[]
try {
projectDirs = await readdir(root)
} catch {
continue
}
for (const dir of projectDirs) {
let names: string[]
try {
names = await readdir(join(root, dir))
} catch {
continue
}
for (const name of names) {
if (!name.endsWith('.jsonl')) continue
files.push({
filePath: join(root, dir, name),
sessionId: name.slice(0, -'.jsonl'.length),
project: dir.split('-').filter(Boolean).pop() ?? dir,
})
}
}
}
return files
}
async function statRef(file: SessionFile): Promise<SessionRef | null> {
try {
const info = await stat(file.filePath)
if (!info.isFile() || info.size === 0) return null
return { ...file, mtimeMs: info.mtimeMs, sizeBytes: info.size }
} catch {
return null
}
}
function newestFirst(refs: Array<SessionRef | null>): SessionRef[] {
return refs.filter((r): r is SessionRef => r !== null).sort((a, b) => b.mtimeMs - a.mtimeMs)
}
export async function listRecentSessions(limit = 15): Promise<SessionRef[]> {
const files = await listSessionFiles()
return newestFirst(await Promise.all(files.map(statRef))).slice(0, limit)
}
// Id lookups match filenames directly so only the matching files get stated.
export async function findClaudeSession(idPrefix: string): Promise<SessionRef | null> {
const matches = (await listSessionFiles()).filter((f) => f.sessionId.startsWith(idPrefix))
return newestFirst(await Promise.all(matches.map(statRef)))[0] ?? null
}
// Claude Code stores an AI-generated session name as "ai-title" entries (the
// last one is current; sessions get re-titled) and, in older sessions, as
// "summary" entries near the top. Scanning one tail and one head chunk finds
// it without reading a potentially 100MB transcript.
const TITLE_CHUNK_BYTES = 262_144
function titleFromChunk(chunk: string): string {
let title = ''
let summary = ''
for (const line of chunk.split('\n')) {
if (line.includes('"type":"ai-title"')) {
try {
const t = (JSON.parse(line) as { aiTitle?: unknown }).aiTitle
if (typeof t === 'string' && t) title = t
} catch {
continue
}
} else if (!summary && line.includes('"type":"summary"')) {
try {
const t = (JSON.parse(line) as { summary?: unknown }).summary
if (typeof t === 'string' && t) summary = t
} catch {
continue
}
}
}
return title || summary
}
export async function readChunk(filePath: string, start: number, length: number): Promise<string> {
const fd = await open(filePath, 'r')
try {
const buf = Buffer.alloc(length)
const { bytesRead } = await fd.read(buf, 0, length, start)
return buf.subarray(0, bytesRead).toString('utf-8')
} finally {
await fd.close()
}
}
export async function readSessionTitle(ref: SessionRef): Promise<string> {
try {
const tailStart = Math.max(0, ref.sizeBytes - TITLE_CHUNK_BYTES)
let title = titleFromChunk(await readChunk(ref.filePath, tailStart, TITLE_CHUNK_BYTES))
if (!title && tailStart > 0) title = titleFromChunk(await readChunk(ref.filePath, 0, TITLE_CHUNK_BYTES))
return title.replace(/\s+/g, ' ').trim()
} catch {
return ''
}
}
async function resolveSession(arg: string | undefined, provider: 'claude' | 'codex'): Promise<SessionRef | null> {
if (arg && (arg.endsWith('.jsonl') || arg.includes('/'))) {
if (!existsSync(arg)) return null
const info = await stat(arg)
const base = arg.split('/').pop() ?? arg
return {
filePath: arg,
sessionId: base.replace(/\.jsonl$/, ''),
project: '',
mtimeMs: info.mtimeMs,
sizeBytes: info.size,
}
}
if (provider === 'codex') {
const codex = await import('./context-tree-codex.js')
if (!arg) return (await codex.listRecentCodexSessions(1))[0] ?? null
return codex.findCodexSession(arg)
}
if (!arg) return (await listRecentSessions(1))[0] ?? null
return findClaudeSession(arg)
}
function num(n: number): string {
return n.toLocaleString('en-US')
}
export function relativeAge(mtimeMs: number): string {
const mins = Math.max(0, Math.round((Date.now() - mtimeMs) / 60_000))
if (mins < 60) return `${mins}m ago`
if (mins < 60 * 24) return `${Math.round(mins / 60)}h ago`
return `${Math.round(mins / (60 * 24))}d ago`
}
export type ContextRow = { depth: number; label: string; count: number; tokens: number; bold?: boolean }
export function snapshotRows(view: ContextSnapshot): ContextRow[] {
const rows: ContextRow[] = []
rows.push({ depth: 0, label: 'assistant', count: view.assistant.count, tokens: view.assistant.tokens, bold: true })
rows.push({ depth: 1, label: 'text', count: view.assistant.text.count, tokens: view.assistant.text.tokens })
if (view.assistant.reasoning.count > 0) rows.push({ depth: 1, label: 'reasoning', count: view.assistant.reasoning.count, tokens: view.assistant.reasoning.tokens })
rows.push({ depth: 1, label: 'tool-call', count: view.assistant.toolCall.count, tokens: view.assistant.toolCall.tokens })
for (const t of view.assistant.byTool) rows.push({ depth: 2, label: t.tool, count: t.count, tokens: t.tokens })
rows.push({ depth: 0, label: 'user', count: view.user.count, tokens: view.user.tokens, bold: true })
rows.push({ depth: 1, label: 'text', count: view.user.text.count, tokens: view.user.text.tokens })
if (view.user.image.count > 0) rows.push({ depth: 1, label: 'image', count: view.user.image.count, tokens: view.user.image.tokens })
if (view.user.compactSummary.count > 0) rows.push({ depth: 1, label: 'compact-summary', count: view.user.compactSummary.count, tokens: view.user.compactSummary.tokens })
if (view.user.meta.count > 0) rows.push({ depth: 1, label: 'meta', count: view.user.meta.count, tokens: view.user.meta.tokens })
rows.push({ depth: 0, label: 'tool', count: view.toolResult.count, tokens: view.toolResult.tokens, bold: true })
rows.push({ depth: 1, label: 'tool-result', count: view.toolResult.count, tokens: view.toolResult.tokens })
if (view.system.count > 0) rows.push({ depth: 0, label: 'system', count: view.system.count, tokens: view.system.tokens, bold: true })
return rows
}
function renderRows(rows: ContextRow[]): string[] {
const leftLen = (r: ContextRow): number => r.depth * 2 + (r.depth > 0 ? 2 : 0) + r.label.length
const labelWidth = Math.max(...rows.map(leftLen)) + 2
const countWidth = Math.max(...rows.map((r) => num(r.count).length)) + 1
const tokenWidth = Math.max(...rows.map((r) => num(r.tokens).length))
return rows.map((r) => {
const indent = ' '.repeat(r.depth)
const bullet = r.depth > 0 ? chalk.dim('◦ ') : ''
const label = r.depth === 0 ? chalk.bold(r.label) : r.label
const pad = ' '.repeat(labelWidth - leftLen(r))
const count = chalk.dim(`${num(r.count)}x`.padStart(countWidth + 1))
const tokens = (r.bold ? chalk.cyan.bold : chalk.cyan)(num(r.tokens).padStart(tokenWidth + 2))
return ` ${indent}${bullet}${label}${pad}${count}${tokens} ${chalk.dim('tokens')}`
})
}
export function renderContextTree(result: ContextTreeResult, opts: { full?: boolean } = {}): string {
const view = opts.full ? result.full : result.effective
const lines: string[] = []
const scopeLabel = opts.full ? 'full session' : 'effective'
lines.push('')
lines.push(` ${chalk.bold('Context Token Usage')} ${chalk.dim(`(${scopeLabel})`)}`)
const sizeMb = (result.session.sizeBytes / 1024 / 1024).toFixed(1)
const project = result.session.project ? `${result.session.project} · ` : ''
lines.push(chalk.dim(` session ${result.session.sessionId.slice(0, 8)} · ${project}${result.model} · ${relativeAge(result.session.mtimeMs)} · ${sizeMb}MB on disk`))
lines.push('')
const masked = Math.max(0, result.full.tokens - result.effective.tokens)
lines.push(` messages: ${chalk.bold(num(view.messages))}`)
lines.push(` tokens: ${chalk.bold(formatTokens(result.full.tokens))} ${chalk.dim('estimated across the session')}`)
if (result.compactions > 0) {
const pct = result.full.tokens > 0 ? Math.round((result.effective.tokens / result.full.tokens) * 100) : 0
lines.push(` ${chalk.dim('◦')} ${formatTokens(masked)} ${chalk.dim(`compacted away (${num(result.compactions)} compaction${result.compactions === 1 ? '' : 's'})`)}`)
lines.push(` ${chalk.dim('◦')} ${formatTokens(result.effective.tokens)} ${chalk.dim(`effective (${pct}%)`)}`)
}
if (result.reported) {
const { context, window } = result.reported
const windowPart = window ? ` ${chalk.dim(`of ${formatTokens(window)} window (${Math.round((context / window) * 100)}%)`)}` : ''
lines.push(` context (exact, last turn): ${chalk.bold(formatTokens(context))}${windowPart}`)
const overhead = result.reported.context - result.effective.tokens
if (overhead >= 0) {
lines.push(` ${chalk.dim('◦')} ${formatTokens(overhead)} ${chalk.dim('system prompt, tools & memory (derived)')}`)
}
}
lines.push('')
lines.push(...renderRows(snapshotRows(view)))
lines.push('')
lines.push(chalk.dim(' block tokens are estimated (chars/4, images by pixel count, reasoning from per-message usage);'))
lines.push(chalk.dim(' "context (exact)" comes from API usage.'))
if (!opts.full && result.compactions > 0) lines.push(chalk.dim(' showing the live window since the last compaction; use --full for the whole session.'))
lines.push('')
return lines.join('\n')
}
export type TitledSessionRef = SessionRef & { title: string }
function renderSessionList(refs: TitledSessionRef[], provider: 'claude' | 'codex'): string {
const heading = provider === 'codex' ? 'Recent Codex sessions' : 'Recent Claude Code sessions'
const hint = provider === 'codex' ? 'codeburn context <id> --provider codex to inspect one' : 'codeburn context <id> to inspect one'
const lines = ['', ` ${chalk.bold(heading)}`, '']
const projectWidth = Math.max(...refs.map((r) => r.project.length))
for (const ref of refs) {
const sizeMb = (ref.sizeBytes / 1024 / 1024).toFixed(1).padStart(6)
const shortTitle = ref.title.length > 48 ? `${ref.title.slice(0, 47)}…` : ref.title
lines.push(` ${chalk.cyan(ref.sessionId.slice(0, 8))} ${chalk.dim(`${sizeMb}MB`)} ${relativeAge(ref.mtimeMs).padStart(7)} ${chalk.dim(ref.project.padEnd(projectWidth))} ${shortTitle}`)
}
lines.push('')
lines.push(chalk.dim(` ${hint}`))
lines.push('')
return lines.join('\n')
}
export async function listRecentTitledSessions(limit = 15): Promise<TitledSessionRef[]> {
const refs = await listRecentSessions(limit)
const titles = await Promise.all(refs.map(readSessionTitle))
return refs.map((r, i) => ({ ...r, title: titles[i] ?? '' }))
}
export async function runContextCommand(
sessionArg: string | undefined,
opts: { list?: boolean; full?: boolean; json?: boolean; provider?: string },
): Promise<void> {
const provider: 'claude' | 'codex' = opts.provider === 'codex' ? 'codex' : 'claude'
if (opts.list) {
const refs =
provider === 'codex' ? await (await import('./context-tree-codex.js')).listRecentCodexSessions(15) : await listRecentTitledSessions(15)
if (refs.length === 0) {
console.log(provider === 'codex' ? 'No Codex sessions found.' : 'No Claude Code sessions found.')
return
}
if (opts.json) {
console.log(JSON.stringify({ sessions: refs }, null, 2))
return
}
console.log(renderSessionList(refs, provider))
return
}
const session = await resolveSession(sessionArg, provider)
if (!session) {
console.error(sessionArg ? `No ${provider} session matching "${sessionArg}".` : `No ${provider} sessions found.`)
process.exitCode = 1
return
}
const result =
provider === 'codex' ? await (await import('./context-tree-codex.js')).buildCodexContextTree(session) : await buildContextTree(session)
if (opts.json) {
console.log(JSON.stringify(result, null, 2))
return
}
console.log(renderContextTree(result, { full: opts.full }))
}