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 sdcorejs/sdcorejs-agent --skill sdcorejs-using-skillsgit clone --depth 1 https://github.com/sdcorejs/sdcorejs-agentWrote 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/sdcorejs/sdcorejs-agent/sdcorejs-using-skills)<a href="https://agentmods.dev/skills/sdcorejs/sdcorejs-agent/sdcorejs-using-skills"><img src="https://agentmods.dev/badge/skills/sdcorejs/sdcorejs-agent/sdcorejs-using-skills/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/sdcorejs/sdcorejs-agent/sdcorejs-using-skills"><img src="https://agentmods.dev/badge/skills/sdcorejs/sdcorejs-agent/sdcorejs-using-skills.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 | $0.00058 | $0.01747 |
| Opus 5.5 | $0.00023 | $0.00699 |
| Sonnet 5.5 | $0.00012 | $0.00349 |
| Haiku 4.5 | $0.00006 | $0.00175 |
Grade A, and why
sdcorejs-using-skills 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 16d 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 — 153 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Path resolution: Resolve ../../_refs/... relative to this SKILL.md. Resolve another SDCoreJS skill by opening the sibling folder ../<skill-name>/SKILL.md.
Using sdcorejs Skills
Bootstrap
Match descriptions before reading skill bodies. Load
../../_refs/shared/runtime-protocols.md, then only task-relevant references.
Current user instructions/evidence override stored context. Resolve track,
profile, artifact, repository, review, repair, ship and evidence semantics from
../../_refs/shared/system-registry.json; read only fields needed for the route.
Priority when several skills match:
- Explicit skill named by the user.
- Approved plan:
sdcorejs-subagent-driven-developmentfor explicit delegation; otherwisesdcorejs-execute-plan. - Product, design, and direct test work:
sdcorejs-product,sdcorejs-design,sdcorejs-test; failing-test diagnosis usessdcorejs-debug. - Dedicated intent:
sdcorejs-cleanup,sdcorejs-simplify,sdcorejs-explore,sdcorejs-documentation,sdcorejs-review,sdcorejs-repair-loop,sdcorejs-debug,sdcorejs-ship, orsdcorejs-git. - Confirmed implementation:
sdcorejs-ai-agent,sdcorejs-angular,sdcorejs-nestjs, orsdcorejs-nextjs. - Open-ended, ambiguous, or under-specified change:
sdcorejs-brainstorming.
Entry Gate
Choose one path before loading a full workflow:
- Pure Q&A with no authorized write: answer directly.
- UI work selects topics via
../../_refs/design/uiux/index.md; backend/Q&A load none. - Small, explicit, low-risk fix: targeted context, smallest scoped edit, focused verification, and concise review. Behavior, acceptance criteria, ownership, and verification must already be bounded.
- Ambiguous, architectural, cross-cutting, security-sensitive, destructive, concurrency-sensitive, or public-contract change: full workflow.
implement, build and create express write intent, not spec or plan approval.
Apply the selected entry criteria and required artifacts regardless of wording;
a fixture, lab, benchmark, disposable repository or scoped prompt never waives
a required approval gate or artifact.
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.
- 16d ago Changed · +2 lines 00aad4786218
- 25d ago Changed · +2 lines · -14 tokens per session d638732726ed
- 1mo ago Changed · -2 lines 179c95de5a9b
- 1mo ago Changed · +1 lines 05e2ecb7b79e
- 2mo ago First seen · 150 lines · 72 tokens per session scan A 11e875886782
sdcorejs-using-skills is a skill published in the GitHub repository sdcorejs/sdcorejs-agent (2 stars, last pushed 15d ago), licensed MIT. It adds 58 tokens to every session and 1,747 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 2026-08-31.
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