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 agentmods add skills/leifericf/agentic-sdk/check-stylenpx skills add leifericf/agentic-sdk --skill check-stylegit clone --depth 1 https://github.com/leifericf/agentic-sdkWrote 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/leifericf/agentic-sdk/check-style)<a href="https://agentmods.dev/skills/leifericf/agentic-sdk/check-style"><img src="https://agentmods.dev/badge/skills/leifericf/agentic-sdk/check-style.svg" alt="Measured on agentmods" 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 | $0.00037 | $0.01299 |
| Opus 5 | $0.00018 | $0.00649 |
| Sonnet 5 | $0.00007 | $0.00260 |
| Haiku 4.5 | $0.00004 | $0.00130 |
Grade A, and why
check-style 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 4d 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 — 123 lines — stays where its author put it; the contents beside it link to each section on GitHub.
check-style
Role: review the shard against the codified standards.
Failure model: the code reads differently from its surroundings in a way that costs a future reader, or carries an AI tell or process scaffolding that should never reach committed prose.
The standards are cited, not duplicated:
- Prose (docs, ADRs, docstrings, comments, commit and changelog
messages):
skills/shared/references/prose-style.md, backed byskills/shared/references/style-foundations.md. - C:
skills/write-c/references/c-style.md. - Zig:
skills/write-zig/references/zig-style.md. - Clojure:
skills/write-clj/references/clj-style.md. - Elixir:
skills/write-elixir/references/elixir-style.md.
Those files are the checklist, but apply them for judgment, not for
what a lane already gates. An em dash, a prose arrow, or a process ID
is the lint spine task's job; a format nit is the formatter's; an
unused binding is the language linter's. This is the nit tax the
dimension rejects: flag only the style judgment no lane can make.
Look for
- Inconsistency with the surrounding file. A function that names, comments, or structures differently from its unit without reason.
- Pure, shell, or native leakage as a style signal. The highest-value style finding, because the three-way split is the load-bearing structure. IO, a native call, a persistence write, or state mutation inside a core unit; pure decision logic buried in the shell; domain logic inside a native wrapper. Factoring owns the structural fix; style flags it when the seam is readable as a style break.
- Boundary contract drift. A native call whose signature disagrees with the edge contract, or that reaches into a handle's internals from the calling language.
- Comment and docstring debt. The standard and the concrete budget
live in
prose-style.mdand the per-language style file. Apply both directions:- Missing: an ownership or lifetime constraint that is true but unstated where it matters (an allocator ownership transfer, a borrow duration, a transaction invariant).
- Stale: a comment or docstring that contradicts the code.
- Narration: a comment that restates the next line, or a docstring that describes mechanism instead of returns and input shape.
- Verbose: an inline comment block longer than three lines; a file
whose inline comment density exceeds one line per fifty code lines;
a rationale essay that belongs in an ADR; a change note ("used to",
"previously") that belongs in
:deprecatedmetadata. - Docstring overweight: a docstring longer than three lines on a fn whose arguments have no surface area. An options map, a spec, or a public primitive earns the length; a clever implementation does not.
- Banner: a
---rule, ASCII art, or any decorated separator. A section marker is a single;;;; labelline, label only, no prose underneath.
- Leaked process identifiers. A phase, task, slice, run, or plan
identifier, a
plan.ednordecisions.ednreference, or an internal ticket label in a comment, docstring, test description, or commit message. The rule and the allowed durable refs (ADR, the docs tree) live inwrite-prose. Flag the leak; suggest the code-state rephrasing. - Naming that misleads. A name that promises a behavior the code does not deliver, or a name whose meaning has drifted from the domain the surrounding code uses.
- Macro and metaprogramming overreach. A macro or a compile-time construct doing work that belongs in a data function, so the result is unreachable without it.
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.
- 4d ago First seen · 123 lines · 37 tokens per session scan A be88b32f44ea
check-style is a skill published in the GitHub repository leifericf/agentic-sdk (5 stars, last pushed 3d ago), licensed MIT. It adds 37 tokens to every session and 1,299 once invoked, about $0.0002 per session on Opus 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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