Function enrichLog

src/utils/sessionStorage.ts:5136–5183

* Enriches a lite log with metadata from its JSONL file. * Returns the enriched log, or null if the log has no meaningful content * (no firstPrompt, no customTitle — e.g., metadata-only session files).

(
  log: LogOption,
  readBuf: Buffer,
)

 * (no firstPrompt, no customTitle — e.g., metadata-only session files).
 */
async function enrichLog(
  log: LogOption,
  readBuf: Buffer,
): Promise<LogOption | null> {
  if (!log.isLite || !log.fullPath) return log

  const meta = await readLiteMetadata(log.fullPath, log.fileSize ?? 0, readBuf)

  const enriched: LogOption = {
    ...log,
    isLite: false,
    firstPrompt: meta.firstPrompt,
    gitBranch: meta.gitBranch,
    isSidechain: meta.isSidechain,
    teamName: meta.teamName,
    customTitle: meta.customTitle,
    summary: meta.summary,
    tag: meta.tag,
    agentSetting: meta.agentSetting,
    prNumber: meta.prNumber,
    prUrl: meta.prUrl,
    prRepository: meta.prRepository,
    projectPath: meta.projectPath ?? log.projectPath,
  }

  // Provide a fallback title for sessions where we couldn't extract the first
  // prompt (e.g., large first messages that exceed the 16KB read buffer).
  // Previously these sessions were silently dropped, making them inaccessible
  // via /resume after crashes or large-context sessions.
  if (!enriched.firstPrompt && !enriched.customTitle) {
    enriched.firstPrompt = '(session)'
  }
  // Filter: skip sidechains and agent sessions
  if (enriched.isSidechain) {
    logForDebugging(
      `Session ${log.sessionId} filtered from /resume: isSidechain=true`,
    )
    return null
  }
  if (enriched.teamName) {
    logForDebugging(
      `Session ${log.sessionId} filtered from /resume: teamName=${enriched.teamName}`,
    )
    return null
  }

  return enriched
}

/**
 * Enriches enough lite logs from `allLogs` (starting at `startIndex`) to