Obsidian Cost Tuning

set -euo pipefail
VAULT_PATH="${1:-$HOME/MyVault}"

echo "=== Vault Storage Audit ==="
echo "Total vault size: $(du -sh "$VAULT_PATH" 2>/dev/null | cut -f1)"
echo ".obsidian size: $(du -sh "$VAULT_PATH/.obsidian" 2>/dev/null | cut -f1)"
echo ""

# File counts by type
echo "=== Files by Type ==="
command find "$VAULT_PATH" -type f -not -path '*/.obsidian/*' -not -path '*/.trash/*' \
  | sed 's/.*\.//' | sort | uniq -c | sort -rn | head -15

echo ""
echo "=== Top 20 Largest Files ==="
command find "$VAULT_PATH" -type f -not -path '*/.obsidian/*' \
  -exec du -h {} + 2>/dev/null | sort -rh | head -20

echo ""
echo "=== Plugin Cache Sizes ==="
for dir in "$VAULT_PATH/.obsidian/plugins"/*/; do
  [ -f "$dir/data.json" ] || continue
  size=$(du -h "$dir/data.json" 2>/dev/null | cut -f1)
  echo "  $(basename "$dir")/data.json: $size"
done

{
  "patterns": [
    "*.pdf",
    "*.mp4",
    "*.mov",
    "*.zip",
    "*.tar.gz",
    "attachments/archives/**",
    "node_modules/**",
    ".git/**"
  ]
}

# Find files over 5MB that consume sync bandwidth
command find "$VAULT_PATH" -type f -size +5M -not -path '*/.obsidian/*' \
  -exec du -h {} + | sort -rh

# Count sync-heavy file types
echo "PDF count: $(command find "$VAULT_PATH" -name '*.pdf' | wc -l)"
echo "Image count: $(command find "$VAULT_PATH" \( -name '*.png' -o -name '*.jpg' -o -name '*.jpeg' \) | wc -l)"
echo "Total attachments: $(du -sh "$VAULT_PATH/attachments" 2>/dev/null | cut -f1)"

// src/services/api-cache.ts
import { Plugin } from 'obsidian';

interface CacheEntry<T> {
  result: T;
  timestamp: number;
}

export class APICache<T> {
  private cache = new Map<string, CacheEntry<T>>();
  private ttlMs: number;

  constructor(ttlMinutes: number = 60) {
    this.ttlMs = ttlMinutes * 60 * 1000;
  }

  get(key: string): T | null {
    const entry = this.cache.get(key);
    if (!entry) return null;
    if (Date.now() - entry.timestamp > this.ttlMs) {
      this.cache.delete(key);
      return null;
    }
    return entry.result;
  }

  set(key: string, result: T) {
    this.cache.set(key, { result, timestamp: Date.now() });
    // Prevent unbounded growth
    if (this.cache.size > 1000) {
      const oldest = this.cache.keys().next().value;
      if (oldest) this.cache.delete(oldest);
    }
  }

  /** Wrap an API call with cache-first logic */
  async getOrFetch(key: string, fetchFn: () => Promise<T>): Promise<T> {
    const cached = this.get(key);
    if (cached !== null) return cached;
    const result = await fetchFn();
    this.set(key, result);
    return result;
  }

  clear() { this.cache.clear(); }
  get size() { return this.cache.size; }
}

// Usage in plugin
const aiCache = new APICache<string>(24 * 60); // 24-hour TTL

async function getSummary(noteContent: string): Promise<string> {
  const hash = simpleHash(noteContent);
  return aiCache.getOrFetch(hash, async () => {
    // Only calls API if not cached
    const response = await requestUrl({ url: 'https://api.openai.com/...', ... });
    return response.json.choices[0].message.content;
  });
}

// Prevent runaway API costs with a quota counter
class APIQuota {
  private calls = 0;
  private resetTime = 0;
  private maxCallsPerHour: number;

  constructor(maxPerHour: number) {
    this.maxCallsPerHour = maxPerHour;
  }

  canCall(): boolean {
    const now = Date.now();
    if (now - this.resetTime > 3600000) {
      this.calls = 0;
      this.resetTime = now;
    }
    return this.calls < this.maxCallsPerHour;
  }

  recordCall() { this.calls++; }

  remaining(): number {
    return Math.max(0, this.maxCallsPerHour - this.calls);
  }
}

// Usage
const quota = new APIQuota(100); // max 100 API calls per hour

async function callExternalAPI() {
  if (!quota.canCall()) {
    new Notice('API quota exceeded. Try again later.');
    return;
  }
  quota.recordCall();
  // ... make API call
}

# In each note's frontmatter, control what gets published
---
publish: true          # Include this note on Publish site
permalink: custom-url  # Custom URL path
---