{ "content": [ { "status": "completed", "sequence": [ { "thread": { "task": "Read the Claude Code adapter at cli/src/adapters/claude-code/v1.ts to understand how Claude Code stores sessions on disk — file format, directory structure, how traces/conversations are discovered and parsed. Surface the key storage patterns.", "status": "completed", "trace": "AGENT: \"‍\"\n\nTOOL: file_read(command=\"read\", path=\"cli/src/adapters/claude-code/v...\") [EVIDENCE: \"Shows the adapter class structure, directory paths (historyFile, projectsDir), history entry types, and content block interfaces\"]\n```\npath: /Users/tarunsachdeva/code/traces/cli/src/adapters/claude-code/v1.ts\nlinesRead: 200\ntotalLines: 854\nsuggestion: WARNING: 654 lines below not visible, set `startLine` to view remaining lines\nstartLine: 1\ncontent:\n /**\n * Claude Code Adapter\n * \n * Reads sessions from Claude Code's local storage at ~/.claude/\n */\n \n import fs from 'fs';\n import path from 'path';\n import { BaseAdapter, type ParseDiagnostics, type TraceIndexBatch, type TraceIndexCursor } from '../adapter.js';\n import { getProjectPathCandidates } from '../shared/discovery-utils.js';\n import { createDiagnostics, emitDiagnostics, emitAdapterError } from '../shared/diagnostics.js';\n import { scanTailJsonl } from '../shared/history-reader.js';\n import { agentStoragePaths } from '../../config.js';\n import type {\n AgentId,\n TraceMetadata,\n TraceContent,\n ModelId,\n TraceEvent,\n EnvironmentDetails,\n UserMessageEvent,\n AgentTextEvent,\n AgentThinkingEvent,\n ToolCallEvent,\n ToolResultEvent,\n } from '../../types.js';\n \n // Types for Claude Code's JSONL format\n interface HistoryEntry {\n sessionId: string;\n timestamp: number;\n display?: string;\n project?: string;\n }\n \n interface HistorySummary {\n timestamp: number;\n display?: string;\n project?: string;\n }\n \n interface ContentBlock {\n type: string;\n text?: string;\n thinking?: string;\n tool_use_id?: string;\n content?: string | ContentBlock[];\n name?: string;\n id?: string;\n input?: Record;\n is_error?: boolean;\n }\n \n interface JsonlEntry {\n type: string;\n timestamp: number;\n uuid?: string;\n message?: {\n model?: string;\n content?: string | ContentBlock[];\n };\n durationMs?: number;\n thinkingDurationMs?: number;\n }\n \n interface ClaudeHistoryIndexCursor extends TraceIndexCursor {\n historyMtimeMs: number;\n historySize: number;\n projectsDirMtimeMs: number;\n }\n \n /**\n * Claude Code session adapter\n */\n export class ClaudeCodeAdapter extends BaseAdapter {\n readonly id: AgentId = 'claude-code';\n readonly name = 'Claude Code';\n private claudeDir: string;\n private historyFile: string;\n private projectsDir: string;\n private readonly lineBufferLimit = 1024 * 1024;\n \n // History-first discovery tuning: scan from the tail where newest sessions live.\n // Start small to keep warm refreshes fast, then grow chunk size adaptively up to a cap.\n private readonly historyTailReadBytes = 2 * 1024 * 1024;\n private readonly historyMaxScanBytes = 32 * 1024 * 1024;\n private readonly historyChunkGrowthFactor = 2;\n \n // Read more history rows than the UI limit so dedupe/filtering still yields enough traces.\n private readonly historySessionMultiplier = 4;\n \n // Cache resolved sessionId -> sourcePath to avoid repeated directory walks.\n // Bounded to prevent unbounded growth over long-running sessions.\n private readonly sessionPathCache = new Map();\n private readonly sessionPathCacheLimit = 500;\n \n // Safety budgets for fallback scans when history is unavailable/stale.\n // These bound cold-start latency and memory on very large ~/.claude/projects trees.\n private readonly maxFallbackProjectDirsScanned = 2000;\n private readonly maxFallbackSessionFilesScanned = 20000;\n \n // Separate budget for source path lookups used during content open/count updates.\n // Kept higher than fallback discovery so single-trace lookup remains reliable.\n private readonly maxSourceLookupProjectDirsScanned = 4000;\n \n constructor(claudeDir?: string) {\n super();\n this.claudeDir = claudeDir ?? agentStoragePaths.claudeCode;\n this.historyFile = path.join(this.claudeDir, 'history.jsonl');\n this.projectsDir = path.join(this.claudeDir, 'projects');\n }\n \n async isAvailable(): Promise {\n return fs.existsSync(this.claudeDir)\n && (fs.existsSync(this.historyFile) || fs.existsSync(this.projectsDir));\n }\n \n async getTraces(options: { limit?: number } = {}): Promise {\n const limit = options.limit ?? 10;\n if (!await this.isAvailable()) {\n return [];\n }\n \n try {\n const maxSessions = Math.max(limit, limit * this.historySessionMultiplier);\n const traceMap = this.readHistorySummaries(maxSessions);\n const seenIds = new Set();\n const traces: TraceMetadata[] = [];\n \n // Primary: add sessions from history.jsonl\n for (const [traceId, summary] of traceMap.entries()) {\n seenIds.add(traceId);\n const title = summary.display ?? '(No preview)';\n traces.push({\n id: traceId,\n agentId: 'claude-code',\n title,\n preview: title,\n timestamp: summary.timestamp,\n directory: summary.project,\n sourcePath: this.resolveKnownSourcePath(traceId, summary.project) ?? undefined,\n });\n }\n \n // Supplement: scan projects/ for session files not in history.\n // Catches sessions created by the Claude Code extension which may not write to history.jsonl.\n this.supplementWithProjectsScan(traces, seenIds, maxSessions);\n \n traces.sort((a, b) => b.timestamp - a.timestamp);\n return traces.slice(0, limit);\n } catch (err) {\n emitAdapterError('claude-code', 'history_read_error', err);\n return [];\n }\n }\n \n /**\n * Scan ~/.claude/projects/ for session files not already discovered via history.jsonl.\n * The Claude Code VS Code/Cursor extension creates session JSONL files in projects/\n * but may not append entries to history.jsonl, leaving those sessions invisible\n * to history-only discovery.\n */\n private supplementWithProjectsScan(\n traces: TraceMetadata[],\n seenIds: Set,\n maxCandidates: number,\n ): void {\n if (!fs.existsSync(this.projectsDir)) {\n return;\n }\n \n let projectDirs: string[];\n try {\n projectDirs = fs.readdirSync(this.projectsDir);\n } catch {\n return;\n }\n \n let scannedProjectDirs = 0;\n let scannedSessionFiles = 0;\n \n projectLoop:\n for (const projectDir of projectDirs) {\n if (scannedProjectDirs >= this.maxFallbackProjectDirsScanned) {\n break;\n }\n \n const projectPath = path.join(this.projectsDir, projectDir);\n try {\n if (!fs.statSync(projectPath).isDirectory()) continue;\n } catch {\n continue;\n }\n scannedProjectDirs += 1;\n \n let files: string[];\n try {\n files = fs.readdirSync(projectPath);\n } catch {\n continue;\nendLine: 200\n```\n\nAGENT: \"‍‍\"\n\nTOOL: file_read(command=\"read\", path=\"cli/src/adapters/claude-code/v...\", startLine=600, endLine=854) [EVIDENCE: \"Shows the readHistorySummaries tail-scanning, path resolution caching, and session title extraction logic\"]\n```\npath: /Users/tarunsachdeva/code/traces/cli/src/adapters/claude-code/v1.ts\nlinesRead: 255\ntotalLines: 854\nstartLine: 600\ncontent:\n state.pendingToolCalls.set(callId, { name: block.name });\n \n emit({\n id: `event-${state.eventOrder}`,\n type: 'tool_call',\n callId,\n toolName: block.name,\n args: (block.input || {}) as Record,\n timestamp,\n order: state.eventOrder++,\n } satisfies ToolCallEvent);\n }\n }\n }\n \n textContent = textContent.trim();\n if (textContent) {\n emit({\n id: `event-${state.eventOrder}`,\n type: 'agent_text',\n content: textContent,\n timestamp,\n order: state.eventOrder++,\n modelId: msg.model,\n } satisfies AgentTextEvent);\n }\n }\n }\n \n private readHistorySummaries(maxSessions: number): Map {\n const summaries = new Map();\n \n scanTailJsonl({\n filePath: this.historyFile,\n initialChunkBytes: this.historyTailReadBytes,\n maxScanBytes: this.historyMaxScanBytes,\n chunkGrowthFactor: this.historyChunkGrowthFactor,\n parseLine: (line) => JSON.parse(line) as HistoryEntry,\n onEntry: (entry) => {\n if (!entry.sessionId || !entry.timestamp) {\n return true;\n }\n \n const existing = summaries.get(entry.sessionId);\n const normalized = this.normalizeTitleCandidate(entry.display);\n summaries.set(entry.sessionId, {\n timestamp: Math.max(existing?.timestamp ?? 0, entry.timestamp),\n project: existing?.project ?? entry.project,\n display: existing?.display ?? normalized ?? undefined,\n });\n \n return summaries.size < maxSessions;\n },\n });\n \n return summaries;\n }\n \n private buil... Slate session: ses_orch-1773433075947-3-342189 Slate child sessions: ses_31726c711ffeX5AEL8tlAWHtD3, ses_31726c710ffezCq5jNRH5oVIs2