@local/plugin-cache

A shared persistent file-based cache library for Claude Code plugins.

Features

• Persistent file storage in ~/.cache/plugin-cache/
• Per-plugin namespaces for isolation
• TTL-based expiration with stale-while-revalidate
• LRU eviction at 90% of 500MB limit
• Cache invalidation via exact key or regex pattern
• Global CLI for cache management

Installation

In your plugin's package.json:

{
  "dependencies": {
    "@local/plugin-cache": "file:../../shared/cache"
  }
}

Then run npm install.

Usage

Basic Usage

import { PluginCache, TTL, createCacheKey } from "@local/plugin-cache";

// Initialize with namespace
const cache = new PluginCache({
  namespace: "my-plugin",
  defaultTTL: TTL.FIFTEEN_MINUTES,
});

// Get or fetch pattern (recommended)
const data = await cache.getOrFetch(
  "my-cache-key",
  async () => {
    // Fetch data from API
    return await fetchFromAPI();
  },
  { ttl: TTL.HOUR }
);

TTL Presets

import { TTL } from "@local/plugin-cache";

TTL.MINUTE           // 60,000ms (1 minute)
TTL.FIVE_MINUTES     // 300,000ms (5 minutes)
TTL.FIFTEEN_MINUTES  // 900,000ms (15 minutes)
TTL.THIRTY_MINUTES   // 1,800,000ms (30 minutes)
TTL.HOUR             // 3,600,000ms (1 hour)
TTL.SIX_HOURS        // 21,600,000ms (6 hours)
TTL.TWELVE_HOURS     // 43,200,000ms (12 hours)
TTL.DAY              // 86,400,000ms (24 hours)
TTL.WEEK             // 604,800,000ms (7 days)

Creating Cache Keys

import { createCacheKey } from "@local/plugin-cache";

// Simple key
const key = createCacheKey("products");
// Result: "products"

// Key with parameters
const key = createCacheKey("products", { page: 1, limit: 10 });
// Result: "products:page=1&limit=10"

Cache Control Methods

// Disable caching (for --no-cache flag)
cache.disable();

// Re-enable caching
cache.enable();

// Get cache statistics
const stats = cache.getStats();
// { entries: 42, totalSize: 1234567, location: "~/.cache/plugin-cache" }

// Clear all cached data for this namespace
const entriesCleared = cache.clear();

// Invalidate specific key
cache.invalidate("my-cache-key");

// Invalidate by pattern
cache.invalidatePattern(/^products/);

Bypass Cache for Specific Calls

const data = await cache.getOrFetch(
  "my-key",
  () => fetchData(),
  { ttl: TTL.HOUR, bypassCache: true }
);

Recommended TTLs by Data Type

Data Type	TTL	Reason
Stock/inventory levels	5 minutes	Critical for accuracy
Active orders/tickets	5 minutes	Frequently changing
Product details	15 minutes	Occasional updates
Customer profiles	15 minutes	Moderate change rate
Campaign/flow reports	5 minutes	Real-time analytics
Product catalog	1 hour	Infrequent changes
Tax rates, settings	24 hours	Rarely changes
Organisation info	24 hours	Very static
Segments, lists	1 hour	Relatively static

CLI Commands

Each plugin should expose these CLI commands:

# Show cache statistics
npx tsx cli.ts cache-stats

# Clear all cached data
npx tsx cli.ts cache-clear

# Invalidate specific key
npx tsx cli.ts cache-invalidate --key "my-cache-key"

# Bypass cache for a request
npx tsx cli.ts list-products --no-cache

Global CLI

Manage cache across all plugins:

cd ~/.claude/plugins/local-marketplace/shared/cache
npx tsx cli.ts stats          # Global stats
npx tsx cli.ts cleanup        # Manual LRU cleanup
npx tsx cli.ts clear          # Clear everything

Architecture

~/.cache/plugin-cache/
├── manifest.json           # Global manifest with size tracking
├── shopify-order-manager/  # Per-plugin directories
│   ├── products.json
│   ├── orders:page=1.json
│   └── ...
├── gorgias-support-manager/
│   └── ...
└── ...

Cache Entry Format

{
  "data": { ... },
  "cachedAt": 1704067200000,
  "ttl": 900000,
  "staleWhileRevalidate": 86400000,
  "namespace": "shopify-order-manager",
  "key": "products"
}

Invalidation After Mutations

Always invalidate related cache entries after write operations:

async createProduct(data: ProductData): Promise<Product> {
  const result = await this.callTool("create_product", data);

  // Invalidate products cache
  cache.invalidatePattern(/^products/);

  return result;
}

Plugins Using This Library

• shopify-order-manager v1.1.0+
• gorgias-support-manager v1.1.0+
• judgeme-review-manager v1.1.0+
• inflow-inventory-manager v1.1.0+
• airtable-manager v1.1.0+
• klaviyo-marketing-manager v1.1.0+
• xero-accounting-manager v2.1.0+