Memory Allocator

SkillDocs & knowledge

Expert skill for custom memory allocator design optimized for language runtime needs

Instructions available. Your AI can read the instructions. Execution depends on the setup they require.

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Add ahel to your AI once: Claude, ChatGPT, Cursor, Claude Code or Codex. Then ask it to use this.

Then ask your AI: use the Memory Allocator skill

What this skill tells your AI

The instructions your AI receives, as published by a5c-ai/babysitter in library/specializations/programming-languages/skills/memory-allocator/SKILL.md and read by ahel’s review.

Overview

Expert skill for custom memory allocator design optimized for language runtime needs.

Capabilities

Implement bump/arena allocators
Implement free-list allocators with size classes
Design slab allocators for fixed-size objects
Implement thread-local allocation buffers (TLAB)
Handle large object allocation strategies
Implement memory pooling and recycling
Design memory profiling and statistics
Implement address space layout optimization

Target Processes

memory-allocator-design.js
garbage-collector-implementation.js
interpreter-implementation.js
bytecode-vm-implementation.js

Dependencies

jemalloc, tcmalloc references

Usage Guidelines

Size Classes: Design size classes to minimize internal fragmentation
Thread Safety: Use thread-local allocation for hot paths
Large Objects: Handle large objects separately from small allocations
Profiling: Build allocation statistics from the start
GC Integration: Design allocator API with GC integration in mind

Output Schema

{
  "type": "object",
  "properties": {
    "allocatorType": {
      "type": "string",
      "enum": ["bump", "free-list", "slab", "hybrid"]
    },
    "sizeClasses": {
      "type": "array",
      "items": { "type": "integer" }
    },
    "threadSafety": {
      "type": "string",
      "enum": ["single-threaded", "tlab", "lock-free"]
    },
    "generatedFiles": {
      "type": "array",
      "items": { "type": "string" }
    }
  }
}

Signals

GitHub stars: 2k
Forks: 112
Last commit: Sep 2026

Advanced

Item type: skill
Key: memory-allocator
Source: github.com/a5c-ai/babysitter

github.com/a5c-ai/babysitter