A guide to memory allocators in Zig, the programming language. Allocators control how a program requests and releases memory, including patterns such as arenas, pages, and fixed-size buffers.

Use it when designing Zig memory management, selecting an allocator, managing allocation lifecycles, or debugging memory problems.

It helps you choose a suitable memory-lifetime pattern and investigate leaks or incorrect memory handling.

allocators — Skill for Claude Code by vinnie357/claude-skills

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add vinnie357/claude-skills --skill allocators

Clone the repo

git clone --depth 1 https://github.com/vinnie357/claude-skills

Made for: Claude Code.

Or install zig, the plugin that ships this one along with the rest of its 3 skills.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/vinnie357/claude-skills/allocators/github.svg)](https://agentmods.dev/skills/vinnie357/claude-skills/allocators)

Your own site

<a href="https://agentmods.dev/skills/vinnie357/claude-skills/allocators"><img src="https://agentmods.dev/badge/skills/vinnie357/claude-skills/allocators/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/vinnie357/claude-skills/allocators"><img src="https://agentmods.dev/badge/skills/vinnie357/claude-skills/allocators.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 36 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 231 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00036	$0.00231
Opus 5.5	$0.00014	$0.00092
Sonnet 5.5	$0.00007	$0.00046
Haiku 4.5	$0.00004	$0.00023

Measured 2mo ago against content hash b4d3f5a30d85, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

allocators scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/languages/zig/skills/allocators/SKILL.md · 21 lines

What it actually says

Zig Allocators

Memory management patterns, allocator types, and allocation lifecycle.

For allocator types, patterns, and examples, see references/allocators.md.

Anti-fabrication

This skill follows core:anti-fabrication. Verified against zig 0.16.0 (locally installed, claude-skills-204): references/allocators.md's DebugAllocator snippets compile and pass as zig test — this file already had the correct init form (pub const init: Self = .{};, a value, not a function call); a contradicting function-call form was found and fixed in the troubleshooting skill instead, not here. Re-verify against a locally installed zig test before asserting an allocator API this skill doesn't cover — std.heap's allocator-init pattern changed between 0.15 and 0.16.

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

references/allocators.md 5.3 KB

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2mo ago First seen · 21 lines · 36 tokens per session scan A b4d3f5a30d85

Subscribe to this mod's changes

allocators is a skill published in the GitHub repository vinnie357/claude-skills (27 stars, last pushed 14d ago), licensed MIT. It adds 36 tokens to every session and 231 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

allocators next to 6 skills from other repositories
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