Borrowing it
Nothing to install: this file belongs to SSWConsulting/SSW.VerticalSliceArchitecture. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/SSWConsulting/SSW.VerticalSliceArchitecture/main/CLAUDE.mdgit clone --depth 1 https://github.com/SSWConsulting/SSW.VerticalSliceArchitectureWrote 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/instructions/sswconsulting/ssw.verticalslicearchitecture/claude-md)<a href="https://agentmods.dev/instructions/sswconsulting/ssw.verticalslicearchitecture/claude-md"><img src="https://agentmods.dev/badge/instructions/sswconsulting/ssw.verticalslicearchitecture/claude-md.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 5.1 | $0.01020 | $0.01020 |
| Opus 5 | $0.00510 | $0.00510 |
| Sonnet 5 | $0.00204 | $0.00204 |
| Haiku 4.5 | $0.00102 | $0.00102 |
Grade A, and why
SSW.VerticalSliceArchitecture CLAUDE.md 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 8d 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 — 80 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SSW Vertical Slice Architecture — Agent Instructions
Project Overview
A template for .NET 10 + Vertical Slice Architecture + Aspire. Each use case is a self-contained vertical slice in its own folder under src/WebApi/Features/{Feature}/, shared domain types sit in src/WebApi/Common/Domain/, and infrastructure (EF Core, middleware, services) lives in src/WebApi/Common/. Terms are defined in CONTEXT.md.
Technology Stack
- .NET 10, ASP.NET Core, EF Core (SQL Server)
- FastEndpoints — HTTP endpoints with strongly-typed request/response
- Aspire — local orchestration, observability, service discovery
- Vogen — strongly typed IDs
- Ardalis.Specification — query specs
- ErrorOr + FluentValidation — result & input handling
- Bogus — dev seed data
- xUnit + Testcontainers + Respawn — integration tests against a real SQL Server
Rules
Detailed conventions are in .claude/rules/ (auto-loaded by Claude Code when matching files are in scope):
| File | Covers |
|---|---|
architecture.md |
VSA slice layout, FastEndpoints conventions, groups, error handling |
domain.md |
entities, aggregates, value objects, specs, strongly typed IDs, domain events |
database.md |
adding entities, migration commands, seeding |
testing.md |
unit, integration, and architecture test projects |
dependencies.md |
NuGet audit (NU1903) failures, transitive pinning, verifying pins |
verification.md |
what "done" means: Debug + Release builds, all test projects, Aspire boot + health, REST smoke checks |
Skills
The rules describe the conventions; the skills in .claude/skills/ run them. Invoke one by name in Claude Code (/add-slice) or read its SKILL.md directly — the references/ folder beside each holds the code templates.
| Skill | Does |
|---|---|
add-entity |
Domain object, strongly typed ID, errors, spec, EF configuration, DbSet, the VogenEfCoreConverters registration, and the migration |
add-slice |
One use case in its own folder — endpoint, request, response, validator, summary — plus the Feature and Group when it's the first slice, and its tests |
add-adr |
An Architectural Decision Record in docs/adr/ following the repo's Log4brains conventions |
aspire |
Operating the AppHost through the Aspire CLI — start, wait, inspect resources, read logs and traces |
bump-version |
Cuts a template release by bumping the version in VerticalSliceArchitecture.nuspec |
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.
- 8d ago First seen · 80 lines · 1,020 tokens per session scan A 4bc12b6e0cb9
SSW.VerticalSliceArchitecture CLAUDE.md is an instructions file published in the GitHub repository SSWConsulting/SSW.VerticalSliceArchitecture (398 stars, last pushed 1mo ago), licensed MIT. It adds 1,020 tokens to every session, about $0.0051 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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