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 YuxiaoWang-520/harness-craft --skill backend-patternsgit clone --depth 1 https://github.com/YuxiaoWang-520/harness-craftWrote 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/yuxiaowang-520/harness-craft/backend-patterns)<a href="https://agentmods.dev/skills/yuxiaowang-520/harness-craft/backend-patterns"><img src="https://agentmods.dev/badge/skills/yuxiaowang-520/harness-craft/backend-patterns/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/yuxiaowang-520/harness-craft/backend-patterns"><img src="https://agentmods.dev/badge/skills/yuxiaowang-520/harness-craft/backend-patterns.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 | $0.00031 | $0.03331 |
| Opus 5.5 | $0.00012 | $0.01332 |
| Sonnet 5.5 | $0.00006 | $0.00666 |
| Haiku 4.5 | $0.00003 | $0.00333 |
Grade A, and why
backend-patterns 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 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
const requests = this.requests.get(identifier) || [] The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
What ships with it
1 file 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.
- 2mo ago First seen · 599 lines · 31 tokens per session scan A 681c33b4e125
backend-patterns is a skill published in the GitHub repository YuxiaoWang-520/harness-craft (73 stars, last pushed 7mo ago), with no licence file. It adds 31 tokens to every session and 3,331 once invoked, about $0.0001 per session on Opus 5.5. 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.
backend-patterns compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| backend-patternsYuxiaoWang-520/harness-craft | Skill | 73 | 7mo ago | none | A | 31 | Codex |
| event-store-designwshobson/agents | Skill | 42k | yesterday | MIT | A | 33 | Claude Code |
| platform-custom-field-generateforcedotcom/sf-skills | Skill | 1.2k | 2d ago | Apache-2.0 | A | 139 | Claude Code |
| field-service-sobject-create-configureforcedotcom/sf-skills | Skill | 1.2k | 2d ago | Apache-2.0 | A | 74 | Claude Code |
| durable-objectsfcakyon/claude-codex-settings | Skill | 1.2k | today | Apache-2.0 | A | 22 | Claude Code |
| nornicdb-grpcorneryd/NornicDB | Skill | 924 | yesterday | MIT | A | 98 | Claude Code, Codex |
| nw-ddd-eventsourcingnWave-ai/nWave | Skill | 633 | 2d ago | MIT | A | 38 | Claude Code |