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 Tibsfox/gsd-skill-creator --skill software-designgit clone --depth 1 https://github.com/Tibsfox/gsd-skill-creatorWrote 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/tibsfox/gsd-skill-creator/software-design)<a href="https://agentmods.dev/skills/tibsfox/gsd-skill-creator/software-design"><img src="https://agentmods.dev/badge/skills/tibsfox/gsd-skill-creator/software-design/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/tibsfox/gsd-skill-creator/software-design"><img src="https://agentmods.dev/badge/skills/tibsfox/gsd-skill-creator/software-design.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00119 | $0.03424 |
| Opus 5.5 | $0.00048 | $0.01370 |
| Sonnet 5.5 | $0.00024 | $0.00685 |
| Haiku 4.5 | $0.00012 | $0.00342 |
Grade A, and why
software-design 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 1mo 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.
The source is not reproduced here
A licence we could not identify
The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.
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.
- 1mo ago First seen · 284 lines · 119 tokens per session scan A 421d69beed8a
software-design is a skill published in the GitHub repository Tibsfox/gsd-skill-creator (71 stars, last pushed 3mo ago), with no licence file. It adds 119 tokens to every session and 3,424 once invoked, about $0.0005 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 2026-09-03.
Other skills, from other repositories
api-design
REST and GraphQL API design conventions — resource modeling, pagination, error envelopes, versioning, idempotency. Use when adding, changing, or reviewing endpoints.
agent-operated-software
Use when designing, building, operating, or diagnosing an ongoing application whose live backend or control loop includes OpenRig agents, including applications with a Markdown, YAML, or JSON agent control plane or a thin surface over specialist agent roles.
backend-interview
A simulated technical interview for backend developers, based on the candidate’s resume. It asks foundational questions, explores past projects, and includes one system-design exercise.
go1-webhooks
Receive and verify Go1 webhooks. Use when setting up Go1 learning platform webhook handlers, debugging Go1-Signature verification, or handling events like enrollment.create, enrollment.update, and enrollment.delete.
help
Command reference and workflow guide for Plan-Build-Run.
migration-patterns
Safe schema-migration patterns for systems under live traffic — expand/contract, backfill, double-write, shadow-read, online DDL. Use when authoring, reviewing, or sequencing a migration that can't take a maintenance window.