feat(observabilidade): parser JSONL com detecção de tool_calls e skills

2026-04-23 00:46:58 +01:00
parent 17e5736a0a
commit 26b631bbd6
2 changed files with 261 additions and 0 deletions
@@ -0,0 +1,182 @@
+import { createReadStream, statSync } from 'fs'
+import { createInterface } from 'readline'
+import { basename, dirname } from 'path'
+import type { ParseResult, SessionEvent, SessionEventType, SessionMeta, SessionOutcome } from '../../types/session.js'
+
+function slugFromProjectPath(jsonlPath: string): string {
+  return basename(dirname(jsonlPath))
+}
+
+function detectSkillInvoked(text: string | null): string | null {
+  if (!text) return null
+  const m = text.match(/Launching skill:\s*([a-zA-Z0-9:_\-\/]+)/)
+  return m ? m[1] : null
+}
+
+function detectHook(text: string | null): string | null {
+  if (!text) return null
+  const m = text.match(/(?:Hook|hook)\s+["']?([a-zA-Z0-9_\-\.]+\.sh)["']?/)
+  return m ? m[1] : null
+}
+
+function extractText(rawMsg: unknown): string | null {
+  if (!rawMsg || typeof rawMsg !== 'object') return null
+  const msg = rawMsg as { content?: unknown }
+  if (typeof msg.content === 'string') return msg.content
+  if (!Array.isArray(msg.content)) return null
+  const parts: string[] = []
+  for (const part of msg.content) {
+    if (part && typeof part === 'object' && 'type' in part) {
+      const p = part as { type: string; text?: string }
+      if (p.type === 'text' && typeof p.text === 'string') parts.push(p.text)
+    }
+  }
+  return parts.length ? parts.join('\n') : null
+}
+
+function classifyEventType(raw: Record<string, unknown>): SessionEventType {
+  const t = raw.type
+  if (typeof t !== 'string') return 'unknown'
+  if (t === 'user' || t === 'assistant' || t === 'system' || t === 'attachment' || t === 'permission-mode' || t === 'file-history-snapshot') {
+    return t as SessionEventType
+  }
+  return 'unknown'
+}
+
+function deriveOutcome(events: SessionEvent[]): SessionOutcome {
+  if (events.length === 0) return 'unknown'
+  const last = events[events.length - 1]
+  const raw = last.raw as { message?: { stop_reason?: string } }
+  if (last.type === 'assistant' && raw.message?.stop_reason && raw.message.stop_reason !== 'end_turn' && raw.message.stop_reason !== 'tool_use') {
+    if (raw.message.stop_reason === 'error') return 'error'
+  }
+  if (last.type === 'assistant') return 'completed'
+  return 'interrupted'
+}
+
+export async function parseSessionFile(jsonlPath: string): Promise<ParseResult> {
+  const stream = createReadStream(jsonlPath, { encoding: 'utf-8' })
+  const rl = createInterface({ input: stream, crlfDelay: Infinity })
+
+  const events: SessionEvent[] = []
+  let sessionId: string | null = null
+  let permissionMode: string | null = null
+  let firstPrompt: string | null = null
+  let userMessages = 0
+  let assistantMsgs = 0
+  let toolCalls = 0
+  const toolsUsed = new Set<string>()
+  const skillsInvoked = new Set<string>()
+  let firstTs: string | null = null
+  let lastTs: string | null = null
+  let idx = 0
+
+  for await (const line of rl) {
+    if (!line.trim()) continue
+    let raw: Record<string, unknown>
+    try {
+      raw = JSON.parse(line)
+    } catch {
+      continue
+    }
+    const type = classifyEventType(raw)
+    const timestamp = typeof raw.timestamp === 'string' ? raw.timestamp : null
+    if (timestamp) {
+      if (!firstTs) firstTs = timestamp
+      lastTs = timestamp
+    }
+    if (type === 'permission-mode' && typeof raw.permissionMode === 'string') {
+      permissionMode = raw.permissionMode
+    }
+    if (typeof raw.sessionId === 'string') sessionId = raw.sessionId
+
+    const text = extractText((raw as { message?: unknown }).message)
+    let toolName: string | null = null
+    let toolInput: Record<string, unknown> | null = null
+    let toolResult: unknown = null
+
+    if (type === 'assistant' && raw.message && typeof raw.message === 'object') {
+      const content = (raw.message as { content?: unknown[] }).content
+      if (Array.isArray(content)) {
+        for (const part of content) {
+          if (part && typeof part === 'object' && 'type' in part) {
+            const p = part as { type: string; name?: string; input?: Record<string, unknown> }
+            if (p.type === 'tool_use' && typeof p.name === 'string') {
+              toolCalls++
+              toolsUsed.add(p.name)
+              toolName = p.name
+              toolInput = p.input ?? null
+            }
+          }
+        }
+      }
+      assistantMsgs++
+    }
+
+    if (type === 'user') {
+      userMessages++
+      if (!firstPrompt && text && !text.startsWith('<') && text.length > 0) {
+        firstPrompt = text.slice(0, 500)
+      }
+      if (raw.message && typeof raw.message === 'object') {
+        const content = (raw.message as { content?: unknown[] }).content
+        if (Array.isArray(content)) {
+          for (const part of content) {
+            if (part && typeof part === 'object' && 'type' in part) {
+              const p = part as { type: string; content?: unknown }
+              if (p.type === 'tool_result') toolResult = p.content
+            }
+          }
+        }
+      }
+    }
+
+    const skill = detectSkillInvoked(text)
+    if (skill) skillsInvoked.add(skill)
+    const hook = detectHook(text)
+
+    events.push({
+      index: idx++,
+      type,
+      timestamp,
+      raw,
+      text,
+      tool_name: toolName,
+      tool_input: toolInput,
+      tool_result: toolResult,
+      skill_invoked: skill,
+      hook_name: hook,
+    })
+  }
+
+  if (!sessionId) {
+    sessionId = basename(jsonlPath, '.jsonl')
+  }
+
+  const durationSec = firstTs && lastTs ? Math.max(0, Math.round((Date.parse(lastTs) - Date.parse(firstTs)) / 1000)) : null
+  const outcome = deriveOutcome(events)
+  const stats = statSync(jsonlPath)
+
+  const meta: SessionMeta = {
+    session_id: sessionId,
+    project_path: dirname(jsonlPath),
+    project_slug: slugFromProjectPath(jsonlPath),
+    jsonl_path: jsonlPath,
+    started_at: firstTs ?? new Date(stats.birthtimeMs).toISOString(),
+    ended_at: lastTs,
+    duration_sec: durationSec,
+    event_count: events.length,
+    user_messages: userMessages,
+    assistant_msgs: assistantMsgs,
+    tool_calls: toolCalls,
+    first_prompt: firstPrompt,
+    tools_used: [...toolsUsed],
+    skills_invoked: [...skillsInvoked],
+    outcome,
+    permission_mode: permissionMode,
+    file_size: stats.size,
+    indexed_at: new Date().toISOString(),
+  }
+
+  return { meta, events }
+}