gza-spec-review

gza-spec-review is a skill for Claude Code from mhawthorne/gza. It costs 24 tokens per session (1,171 once invoked), scanned A, original, MIT.

An interactive quality check for a feature specification before coding begins. A specification is a written description of a feature, its requirements, and how it should work.

In plain words
What is it for?
Reviewing a specification file and recommending whether it is ready for implementation. It requires the path to the spec, such as specs/features/foo.md.
Why use it?
It catches unsupported paths, commands, configuration details, dependencies, and acceptance criteria before implementation starts.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: names the AskUserQuestion tool.

Good fit Reviewing a specification file and recommending whether it is ready for implementation. It requires the path to the spec, such as specs/features/foo.md.

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Install with agentmods
npx agentmods add skills/mhawthorne/gza/gza-spec-review
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 mhawthorne/gza --skill gza-spec-review
Clone the repo
git clone --depth 1 https://github.com/mhawthorne/gza

Made for: Claude Code.

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 gza-spec-review

README.md
[![agentmods](https://agentmods.dev/badge/skills/mhawthorne/gza/gza-spec-review/github.svg)](https://agentmods.dev/skills/mhawthorne/gza/gza-spec-review)
Your own site
<a href="https://agentmods.dev/skills/mhawthorne/gza/gza-spec-review"><img src="https://agentmods.dev/badge/skills/mhawthorne/gza/gza-spec-review/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 gza-spec-review

Your own site · 80×15
<a href="https://agentmods.dev/skills/mhawthorne/gza/gza-spec-review"><img src="https://agentmods.dev/badge/skills/mhawthorne/gza/gza-spec-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 24 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,171 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
  • 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 $0.00024 $0.01171
Opus 5 $0.00012 $0.00585
Sonnet 5 $0.00005 $0.00234
Haiku 4.5 $0.00002 $0.00117

Measured 12d ago against content hash 76911e6ce122, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

gza-spec-review 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 12d 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.

src/gza/skills/gza-spec-review/SKILL.md · 147 lines

How it starts

The opening of the file, as written. The whole thing — 147 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Gza Spec Review

Run an interactive quality gate for a specific spec file before implementation starts.

Inputs

  • Required: path to a feature spec file (e.g. specs/features/foo.md)

If the user did not provide a spec path, ask for it before proceeding.

Normalize spec paths:

  • If input is just a filename like foo.md, expand to specs/features/foo.md
  • If the file does not exist, stop and report the error

Process

Step 1: Read and understand the spec

Read the spec file in full. Identify:

  • The core problem/feature being described
  • Concrete claims: file paths, command names, config fields, function signatures, workflow steps
  • Acceptance criteria (explicit or implied)
  • Dependencies on other specs, tasks, or systems

Step 2: Verify claims against the codebase

For each concrete claim in the spec:

  1. File paths - Does the spec reference files that exist?

    • Search with Glob for referenced paths
    • Flag paths that don't exist and aren't plausible future additions
  2. Command/option names - Does the spec describe CLI commands or flags?

    • Compare against uv run gza --help and uv run gza <command> --help
    • Flag commands that were renamed or flags that changed
  3. Config fields - Does the spec reference configuration options?

    • Search src/gza/config.py for referenced field names
    • Flag fields that were renamed or removed
  4. Code patterns - Does the spec describe specific functions, classes, or modules?

    • Search with Grep for referenced identifiers
    • Flag identifiers that no longer exist
  5. Workflow steps - Does the spec describe a multi-step process?

    • Verify each step is still how the feature works
    • Flag steps that have been simplified, reordered, or changed

Use git blame/log for context when unsure if something is aspirational vs outdated:

  • Recent specs are more likely aspirational
  • Old specs with recent code changes around the feature are more likely outdated

Step 3: Run the interactive quality gate

Read the full file on GitHub · 147 lines

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. 12d ago First seen · 147 lines · 24 tokens per session scan A 76911e6ce122

Subscribe to this mod's changes

gza-spec-review is a skill published in the GitHub repository mhawthorne/gza (12 stars, last pushed yesterday), licensed MIT. It adds 24 tokens to every session and 1,171 once invoked, about $0.0001 per session on Opus 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.