Function resolveExcludePatterns

src/utils/claudemd.ts:581–612

* Expands exclude patterns by resolving symlinks in absolute path prefixes. * For each absolute pattern (starting with /), tries to resolve the longest * existing directory prefix via realpathSync and adds the resolved version. * Glob patterns (containing *) have their static prefix resolved.

(patterns: string[])

 * Glob patterns (containing *) have their static prefix resolved.
 */
function resolveExcludePatterns(patterns: string[]): string[] {
  const fs = getFsImplementation()
  const expanded: string[] = patterns.map(p => p.replaceAll('\\', '/'))

  for (const normalized of expanded) {
    // Only resolve absolute patterns — glob-only patterns like "**/*.md" don't have
    // a filesystem prefix to resolve
    if (!normalized.startsWith('/')) {
      continue
    }

    // Find the static prefix before any glob characters
    const globStart = normalized.search(/[*?{[]/)
    const staticPrefix =
      globStart === -1 ? normalized : normalized.slice(0, globStart)
    const dirToResolve = dirname(staticPrefix)

    try {
      // sync IO: called from sync context (isClaudeMdExcluded -> processMemoryFile -> getMemoryFiles)
      const resolvedDir = fs.realpathSync(dirToResolve).replaceAll('\\', '/')
      if (resolvedDir !== dirToResolve) {
        const resolvedPattern =
          resolvedDir + normalized.slice(dirToResolve.length)
        expanded.push(resolvedPattern)
      }
    } catch {
      // Directory doesn't exist; skip resolution for this pattern
    }
  }

  return expanded
}

/**
 * Recursively processes a memory file and all its @include references