axum-harness: Skill for Claude Code

.agents/skills/harness-architecture-review/SKILL.md

harness-architecture-review is a skill for Claude Code, Codex from openclosed-org/axum-harness. It costs 61 tokens per session (376 once invoked), scanned A, original, Apache-2.0.

A method for finding worthwhile architecture improvements before refactoring. It checks whether modules and interfaces provide real variation, testing value, or a useful boundary, while respecting repository ownership.

In plain words
What is it for?
Use it when reviewing coupling, module structure, test seams, adapters, workers, services, or the depth of an existing architecture.
Why use it?
It distinguishes meaningful design problems from harmless small modules and supports recommendations with code and test evidence.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents); mentions AGENTS.md.

This is openclosed-org/axum-harness's own configuration. It tells Claude Code and Codex how to work on axum-harness itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything axum-harness configures →

Reuse

Borrowing it

Nothing to install: this file belongs to openclosed-org/axum-harness. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/openclosed-org/axum-harness/main/.agents/skills/harness-architecture-review/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/openclosed-org/axum-harness

Made for: Claude Code, Codex.

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 harness-architecture-review

README.md
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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.

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Your own site · 80×15
<a href="https://agentmods.dev/skills/openclosed-org/axum-harness/harness-architecture-review"><img src="https://agentmods.dev/badge/skills/openclosed-org/axum-harness/harness-architecture-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 61 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 376 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00061 $0.00376
Opus 5.5 $0.00024 $0.00150
Sonnet 5.5 $0.00012 $0.00075
Haiku 4.5 $0.00006 $0.00038

Measured 2mo ago against content hash 3be196bf267f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

harness-architecture-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 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.

.agents/skills/harness-architecture-review/SKILL.md · 47 lines

What it actually says

Harness Architecture Review

Use this skill to surface architecture friction before proposing refactors.

Workflow skills guide process. Ownership skills still decide writable boundaries.

Process

  1. Read AGENTS.md, agent/codemap.yml, docs/architecture/north-star.md, and accepted ADRs in the area.
  2. Explore code and tests before judging architecture.
  3. Identify where understanding requires bouncing across many shallow modules.
  4. Apply the deletion test to suspected pass-through modules.
  5. Check whether a seam has real variation, testing value, or topology-late value.
  6. Check ownership boundaries before recommending changes.
  7. Present candidates only. Do not edit first.

Candidate Format

For each candidate, report:

  1. files or owner areas involved
  2. problem and evidence
  3. why the current module or seam is shallow
  4. proposed deeper interface in plain English
  5. benefit in leverage, locality, and testability
  6. ADR or north-star conflict, if any
  7. risk and suggested verification

Ask which candidate to explore before designing interfaces or changing code.

Repository-Specific Rules

  1. A service library can be a semantic boundary without becoming a process boundary.
  2. A Rust trait is not automatically a useful seam.
  3. Platform metadata must not absorb service-local semantics.
  4. Server handlers adapt protocols; they do not own domain rules.
  5. Worker reliability claims require executable retry, checkpoint, dedupe, replay, and recovery evidence at the claimed level.
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 · 47 lines · 61 tokens per session scan A 3be196bf267f

Subscribe to this mod's changes

harness-architecture-review is a skill published in the GitHub repository openclosed-org/axum-harness (51 stars, last pushed 5mo ago), licensed Apache-2.0. It adds 61 tokens to every session and 376 once invoked, about $0.0002 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.

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