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 skills add SSWConsulting/SSW.VerticalSliceArchitecture --skill add-slicegit 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/skills/sswconsulting/ssw.verticalslicearchitecture/add-slice)<a href="https://agentmods.dev/skills/sswconsulting/ssw.verticalslicearchitecture/add-slice"><img src="https://agentmods.dev/badge/skills/sswconsulting/ssw.verticalslicearchitecture/add-slice/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.
<a href="https://agentmods.dev/skills/sswconsulting/ssw.verticalslicearchitecture/add-slice"><img src="https://agentmods.dev/badge/skills/sswconsulting/ssw.verticalslicearchitecture/add-slice.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00125 | $0.02193 |
| Opus 5 | $0.00063 | $0.01097 |
| Sonnet 5 | $0.00025 | $0.00439 |
| Haiku 4.5 | $0.00013 | $0.00219 |
Grade A, and why
add-slice scanned grade A with 1 finding 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 9d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
Then exercise it for real — a green test suite doesn't prove the route is where you think it is. Boot with `aspire start --isolated` (see the `aspire` skill), wait for the WebApi resource to go healthy, and call the endp How it starts
The opening of the file, as written. The whole thing — 95 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Add a Slice
A slice is one use case, owning everything it needs from HTTP surface to persistence, in its own folder. CreateHero is a slice. A Feature is the group of slices over the same aggregate, sharing a route prefix — Heroes is a Feature, and it is not itself a slice. CONTEXT.md at the repo root defines both, along with Group, Endpoint, and the rest of the vocabulary. Use those words, and avoid the ones it lists under Avoid.
This skill adds a slice. It creates the Feature and its Group too, but only when the slice is the first one in that Feature.
Not every slice is HTTP. PowerLevelUpdated is a slice triggered by a domain event rather than a request — the same folder-per-use-case shape, with an event handler in place of an endpoint.
Read the live reference first
src/WebApi/Features/Heroes/CreateHero/— the canonical command slice, all five filessrc/WebApi/Features/Heroes/GetAllHeroes/— a paged, sorted list querysrc/WebApi/Features/Teams/GetTeam/— a single-item query with a route parametersrc/WebApi/Features/Teams/AddHeroToTeam/— a command that loads aggregates through specssrc/WebApi/Features/Teams/PowerLevelUpdated/— an event-triggered slice
The templates in references/ follow these. If they disagree, the repo wins — follow it and fix the template.
What you need to know before scaffolding
| Input | Notes |
|---|---|
| Feature | The plural noun that owns the route prefix (Heroes, Teams). Does one already exist for this aggregate, or is this its first slice? |
| Use case | Verb + noun, PascalCase (CreateHero, ArchiveTeam). This names the slice folder, the endpoint, and the OpenAPI operation ID. |
| Command or query | A command mutates and returns 200 with an ID or 204; a query reads and projects. |
| HTTP verb and route | Relative to the Group prefix — Post("/") becomes POST /api/heroes. |
| Request shape | Body fields plus any route parameters. FastEndpoints binds both into one request record. |
| Response shape | Or none, for a 204. |
| Failure modes | Not found, conflict, forbidden — each needs a Produces(...) and a matching Send.*Async. |
What ships with it
3 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.
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.
- 9d ago First seen · 95 lines · 125 tokens per session scan A 12bac3a7535d
add-slice is a skill published in the GitHub repository SSWConsulting/SSW.VerticalSliceArchitecture (398 stars, last pushed 1mo ago), licensed MIT. It adds 125 tokens to every session and 2,193 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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