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.
npx agentmods add skills/codewithmukesh/dotnet-claude-kit/arch-checknpx skills add codewithmukesh/dotnet-claude-kit --skill arch-checkgit clone --depth 1 https://github.com/codewithmukesh/dotnet-claude-kitWrote 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.
[](https://agentmods.dev/skills/codewithmukesh/dotnet-claude-kit/arch-check)<a href="https://agentmods.dev/skills/codewithmukesh/dotnet-claude-kit/arch-check"><img src="https://agentmods.dev/badge/skills/codewithmukesh/dotnet-claude-kit/arch-check.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00111 | $0.01286 |
| Opus 5 | $0.00056 | $0.00643 |
| Sonnet 5 | $0.00022 | $0.00257 |
| Haiku 4.5 | $0.00011 | $0.00129 |
Grade A, and why
arch-check 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 5d 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.
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.
/arch-check
What
Verifies that the code still matches the architecture it claims to have. Architectures rot through small, individually-reasonable changes — a Domain project that gains an EF Core reference, a module that reaches into a sibling's internals, an endpoint defined outside the host. This workflow catches the rot using project-graph and dependency analysis, not file-by-file reading.
Output: a violation report with severity, file:line evidence, and the concrete fix — or a clean conformance pass.
When
- "check my architecture", "are there layer violations", "dependency direction"
- Before a release or after a large feature lands
- After onboarding to an unfamiliar codebase that claims an architecture
- Recurring on teams where multiple people merge to shared modules
- NOT for choosing an architecture — that is
architecture-advisor
How
Step 1: Establish the declared architecture
In order of authority: the project's CLAUDE.md, an ADR in docs/decisions/,
or ask the user. Never infer silently — a wrong baseline produces a wrong
report. The four supported baselines and their rules:
| Architecture | Rules checked |
|---|---|
| Vertical Slice | Features don't reference sibling features; shared code only via explicitly shared folders/projects |
| Clean Architecture | Domain → nothing; Application → Domain only; Infrastructure → Application; Api → Application (never Api → Infrastructure types, wiring only) |
| DDD + Clean | Clean rules + aggregates referenced only via roots; domain events for cross-aggregate effects |
| Modular Monolith | No project references between modules except *.Contracts; cross-module calls via integration events or contracts |
Step 2: Project-level dependency direction (cheapest, catches most)
get_project_graph()
Map every project reference against the baseline's allowed arrows. A single wrong reference here (Domain → Infrastructure) is a CRITICAL finding — it makes every downstream violation possible.
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.
- 5d ago First seen · 147 lines · 111 tokens per session scan A 7f3fab403561
arch-check is a skill published in the GitHub repository codewithmukesh/dotnet-claude-kit (693 stars, last pushed 28d ago), licensed MIT. It adds 111 tokens to every session and 1,286 once invoked, about $0.0006 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.
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