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makefile-validator

makefile-validator is a skill for Claude Code from akin-ozer/cc-devops-skills. It costs 21 tokens per session (1,847 once invoked), scanned A, original, Apache-2.0.

A validation guide for Makefiles and .mk files. Makefiles describe build commands, and validation checks their syntax, formatting, security, dependencies, and common problems.

In plain words
What is it for?
It is for linting, auditing, hardening, and troubleshooting Makefiles using dry runs and available validation tools.
Why use it?
It finds build-file errors and maintainability or security issues before they cause failures in development or continuous integration.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the devops-skills-plugin plugin — 31 skills shipped together

not rated 332repo +2 3mo ago A scan Socket: warnSnyk: warnSkillSpector: pass 21 tokens original Apache-2.0

Good fit It is for linting, auditing, hardening, and troubleshooting Makefiles using dry runs and available validation tools.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/akin-ozer/cc-devops-skills/makefile-validator
View source ↗ akin-ozer/cc-devops-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 akin-ozer/cc-devops-skills --skill makefile-validator
Clone the repo
git clone --depth 1 https://github.com/akin-ozer/cc-devops-skills

Made for: Claude Code.

Or install devops-skills-plugin, the plugin that ships this one along with the rest of its 31 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.

agentmods badge for makefile-validator

README.md
[![agentmods](https://agentmods.dev/badge/skills/akin-ozer/cc-devops-skills/makefile-validator/github.svg)](https://agentmods.dev/skills/akin-ozer/cc-devops-skills/makefile-validator)
Your own site
<a href="https://agentmods.dev/skills/akin-ozer/cc-devops-skills/makefile-validator"><img src="https://agentmods.dev/badge/skills/akin-ozer/cc-devops-skills/makefile-validator/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.

agentmods 80×15 button for makefile-validator

Your own site · 80×15
<a href="https://agentmods.dev/skills/akin-ozer/cc-devops-skills/makefile-validator"><img src="https://agentmods.dev/badge/skills/akin-ozer/cc-devops-skills/makefile-validator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 21 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,847 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. Third-party audits
  • Socket warn 15 Sept 2026
  • Snyk warn 15 Sept 2026
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00021 $0.01847
Opus 5.5 $0.00008 $0.00739
Sonnet 5.5 $0.00004 $0.00369
Haiku 4.5 $0.00002 $0.00185

Measured 2mo ago against content hash 758d3db075a3, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

makefile-validator 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.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/test_validate.sh, scripts/validate_makefile.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

devops-skills-plugin/skills/makefile-validator/SKILL.md · 242 lines

How it starts

The opening of the file, as written. The whole thing — 242 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Makefile Validator

Overview

Use this skill to validate Makefiles with a local-first, deterministic flow.

Default validator entrypoint:

bash scripts/validate_makefile.sh <makefile-path>

Validation layers:

  1. Dependency preflight (python3, pip3, make)
  2. GNU make syntax check (make -n --dry-run) when make is available
  3. mbake validate
  4. mbake format --check
  5. Custom security, best-practice, and optimization checks
  6. Optional checkmake and unmake checks when installed

Trigger Guidance

Use this skill when the request includes Makefile quality, linting, validation, hardening, or troubleshooting.

Trigger Phrases

  • "Validate this Makefile"
  • "Lint my .mk file"
  • "Find issues in this build Makefile"
  • "Check Makefile security problems"
  • "Review this Makefile before CI"

Non-Trigger Examples

  • Creating a brand new Makefile from scratch (use makefile-generator)
  • Running build targets as part of delivery
  • General shell scripting work unrelated to Makefiles

Deterministic Execution Model

Run from this skill directory for shortest commands:

cd devops-skills-plugin/skills/makefile-validator

Step 1: Preflight

  1. Confirm target file exists and is readable.
  2. Confirm whether file edits are allowed (writable) or only suggestions can be returned (read-only).
  3. Prefer the default validator path first; use fallbacks only when blocked by environment constraints.

Step 2: Baseline Validation (Default Path)

# From skill directory
bash scripts/validate_makefile.sh <makefile-path>

# From repository root
bash devops-skills-plugin/skills/makefile-validator/scripts/validate_makefile.sh <makefile-path>

Always record:

  • command executed
  • exit code
  • summary counts (Errors, Warnings, Info)
  • issue locations reported by tools

Step 3: Interpret Output and Exit Code

Exit code Meaning Expected summary line Action
0 no blocking findings Validation PASSED optional improvements only
1 warning-only result Validation PASSED with warnings fix recommended; merge policy dependent
2 error result Validation FAILED - errors must be fixed fix required, then rerun

Read the full file on GitHub · 242 lines

Files

What ships with it

7 files 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.

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.

  1. 2mo ago First seen · 242 lines · 21 tokens per session scan A 758d3db075a3

Subscribe to this mod's changes

makefile-validator is a skill published in the GitHub repository akin-ozer/cc-devops-skills (332 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 21 tokens to every session and 1,847 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.

Debugging
Related

makefile-validator compared with skills from other repositories

makefile-validator next to 6 skills from other repositories
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