content-hash-cache-pattern

Cache file processing results using SHA-256 content hashes.

8|Updated Feb 15, 2026

Search Tags:#performance #caching #file processing #sha256 #design pattern #content hash

Ready to run

npx skills add https://github.com/cyphercr0w/codeck --skill content-hash-cache-pattern-cyphercr0w

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: content-hash-cache-pattern
Source: https://github.com/cyphercr0w/codeck/tree/main/apps/runtime/src/templates/presets/default/ecc/skills/content-hash-cache-pattern
Command: npx skills add https://github.com/cyphercr0w/codeck --skill content-hash-cache-pattern-cyphercr0w

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill caches the results of expensive file processing tasks, like PDF parsing or image analysis, using content hashes as keys. This ensures that processing is only re-done when file content actually changes, not just when the file is moved or renamed.

Core Features & Use Cases

Path-Independent Caching: Cache keys are derived from file content (SHA-256 hash), making the cache resilient to file renames and moves.
Automatic Invalidation: When file content changes, the hash changes, automatically invalidating the old cache entry.
Service Layer Separation: Keeps expensive processing functions pure by handling caching logic in a separate wrapper.
Use Case: When building a system that processes many documents (e.g., extracting text from PDFs), this pattern ensures that already processed documents are served quickly from the cache, significantly speeding up batch operations and repeated analyses.

Quick Start

Use the content-hash-cache-pattern skill to extract text from the file located at '/path/to/document.pdf', enabling caching.

Frequently Asked Questions about content-hash-cache-pattern

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I cache file processing results so they survive renames or moves?▼

A content-hash caching mechanism derives cache keys from file content using SHA-256 hashes. This ensures cache hits even after files are moved or renamed, preventing redundant processing of identical content.

How does content hash caching handle file content modifications?▼

Content hash caching automatically invalidates old cache entries when file content changes. Because the SHA-256 hash updates with any file modification, the stale entry is bypassed and the file is reprocessed.

What is the best way to cache expensive document processing operations in a pipeline?▼

Using a content-hash caching pattern separates caching logic into a distinct service layer. This keeps expensive file processing functions pure while serving processed documents quickly from the cache during batch operations.

Can I use content hash caching for batch processing duplicate files?▼

Yes, content hash caching is ideal for batch processing duplicate files. It automatically serves repeated results from the cache when identical file content is detected, significantly speeding up batch document processing.

Does this caching pattern require external dependencies to implement?▼

No, this content-hash caching pattern requires no external dependencies. It implements the SHA-256 hashing and caching logic natively as a service layer wrapper around your existing expensive file processing functions.