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 it235/multica-best-practices --skill multica-artifact-backendgit clone --depth 1 https://github.com/it235/multica-best-practicesWrote 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/it235/multica-best-practices/multica-artifact-backend)<a href="https://agentmods.dev/skills/it235/multica-best-practices/multica-artifact-backend"><img src="https://agentmods.dev/badge/skills/it235/multica-best-practices/multica-artifact-backend/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/it235/multica-best-practices/multica-artifact-backend"><img src="https://agentmods.dev/badge/skills/it235/multica-best-practices/multica-artifact-backend.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 | $0.00042 | $0.00401 |
| Opus 5.5 | $0.00017 | $0.00160 |
| Sonnet 5.5 | $0.00008 | $0.00080 |
| Haiku 4.5 | $0.00004 | $0.00040 |
Grade A, and why
multica-artifact-backend 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.
What it actually says
Artifact · API Contract Sync
Purpose
Land API contract artifacts to the team's unified API platform and let downstream (frontend / test) retrieve them via a stable reference.
This skill decouples "platform integration" from "role prompt": the role prompt only says "produce API contract", not which platform. Changing companies (Swagger / Postman / YApi / internal gateway) means editing only this skill, not the @BackendDev prompt.
Default platform: Apifox
- Output: API contract (endpoints, in/out params, error codes, auth, state-machine boundaries).
- Upload: maintain interface definitions in Apifox, export / sync, then use the project / interface-group link as the artifact reference.
- Retrieve: downstream @FrontendDev / @Tester read via the link — the link is the stable reference.
Content spec (platform-independent part)
Per the stage convention, the API contract at least contains: endpoint list, request/response schema, error-code table, auth method, mapping to BR- business rules.
Usage (role side writes only this line)
@BackendDev: "Produce API contract, land it via
multica-artifact-backendskill to the team API platform, and return the link."
Swap platform (no role-prompt change)
Replace this skill's "default platform" section with your tool (Swagger / YApi / Postman / internal gateway), keeping the "upload + return stable link" interface unchanged.
Why it works
API platforms differ by team; hard-coding the platform name into the role prompt freezes it. Sinking it into the skill keeps the role's "what to produce" description stable while the platform swaps with the skill.
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 · 35 lines · 42 tokens per session scan A 8fa72a508725
multica-artifact-backend is a skill published in the GitHub repository it235/multica-best-practices (212 stars, last pushed 1mo ago), licensed MIT. It adds 42 tokens to every session and 401 once invoked, about $0.0002 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 2026-09-11.
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