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 IamK77/Skill --skill systemsgit clone --depth 1 https://github.com/IamK77/SkillWrote 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/iamk77/skill/systems)<a href="https://agentmods.dev/skills/iamk77/skill/systems"><img src="https://agentmods.dev/badge/skills/iamk77/skill/systems/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/iamk77/skill/systems"><img src="https://agentmods.dev/badge/skills/iamk77/skill/systems.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 | $0.00037 | $0.00986 |
| Opus 5.5 | $0.00015 | $0.00394 |
| Sonnet 5.5 | $0.00007 | $0.00197 |
| Haiku 4.5 | $0.00004 | $0.00099 |
Grade A, and why
systems scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 27d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 88 lines — stays where its author put it; the contents beside it link to each section on GitHub.
systems
Turn a selected visual direction into versioned tokens, reusable components, and an inspectable handoff. Use for design-system implementation, not to choose the creative direction by checklist.
Inputs
Selected direction or existing design language; target platforms; real component use cases; token and ownership constraints.
Run record
Use checklist 0.5 or newer for this SOP. Reading or reloading the skill must not reset work. For a new task, run checklist init "${CLAUDE_SKILL_DIR}" --new --path "/absolute/project"; retain its returned ID as RUN. For existing work, use checklist resume "$RUN", then checklist show --run "$RUN". Outside Claude, replace the skill-directory variable with this directory’s actual path.
Commands below record work after it is done. Replace evidence placeholders with concise artifact locations and observations. Manual confirmations are not independent proof; a sensor pass covers only the command and inputs it observed. verify does not close a stage; advance checks that its required readings are fulfilled. Use report --run "$RUN" for the retained history.
Procedure
contract
Inventory the selected decisions and actual consumers. Define primitive/semantic token roles, component responsibilities, and the source that owns each value; keep exceptions explicit.
Record these artifacts after doing the work:
- Token roles and representative component use cases are specified.
checklist check contract roles --run "$RUN" --evidence "<artifact and observation>" - Sources of truth, consumers, and exceptions are named.
checklist check contract ownership --run "$RUN" --evidence "<artifact and observation>"
When this stage is fulfilled: checklist advance contract --run "$RUN".
implement
Implement tokens and representative components, including important states and themes. Build living examples and exercise the actual consuming code; avoid parallel hand-maintained copies.
What ships with it
6 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.
- 27d ago Changed · -37 lines · -186 tokens per session 16727fa84060
- 1mo ago First seen · 125 lines · 223 tokens per session scan A ee4179beeb54
systems is a skill published in the GitHub repository IamK77/Skill (2 stars, last pushed 5d ago), licensed Apache-2.0. It adds 37 tokens to every session and 986 once invoked, about $0.0001 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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