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 xonovex/platform --skill typescript-guidegit clone --depth 1 https://github.com/xonovex/platformWrote 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/xonovex/platform/typescript-guide)<a href="https://agentmods.dev/skills/xonovex/platform/typescript-guide"><img src="https://agentmods.dev/badge/skills/xonovex/platform/typescript-guide/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/xonovex/platform/typescript-guide"><img src="https://agentmods.dev/badge/skills/xonovex/platform/typescript-guide.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 | $0.00063 | $0.00828 |
| Opus 5 | $0.00032 | $0.00414 |
| Sonnet 5 | $0.00013 | $0.00166 |
| Haiku 4.5 | $0.00006 | $0.00083 |
Grade A, and why
typescript-guide 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 3d 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 — 44 lines — stays where its author put it; the contents beside it link to each section on GitHub.
TypeScript Coding Guidelines
Requirements
- Node.js ESM, TypeScript ≥ 5.8, Vitest ≥ 3, Zod ≥ 4.
Essentials
- Strict mode - Enable strict flags, avoid
@ts-ignorewithout comment+issue - Type safety - Explicit public types,
unknownoverany, derive from generated types - Imports - Use
import typefor type-only imports - Async/await - Handle errors explicitly, only use
asyncwithawait, see references/async-without-await.md, references/unnecessary-async-keywords.md - Immutability - Use
const/readonlywhere possible - Validation - Zod for I/O boundaries, infer types from schemas
- Linting - Never suppress with eslint-disable, fix root causes, see references/avoid-eslint-disable.md
- Template literals - Convert numbers with
String(value), see references/template-literals-require-string-conversion.md - Numeric literals - Use underscores in large numbers (
30_000), see references/numeric-separator-enforcement.md - Method references - Keep object references to maintain
thisbinding, see references/unbound-method-references.md - Environment - Use dot notation for
process.envaccess, see references/env-access-bracket-notation.md - Paradigm - Functional style → fp-guide; class/OO design → oop-guide
Gotchas
- Structural typing means
{ a: string }accepts{ a: string, b: number }silently: explicitsatisfiesis the way to catch unintended extras ascasts bypass the type system without check: prefer narrowing functions (type predicates) over caststypevsinterface: interfaces merge across declarations, types don't.declare global { interface Window { ... } }works,type Window = ...doesn'tunknownis the saferany, but it doesn't propagate; narrowing once doesn't carry across assignments- Module resolution depends on
tsconfigmoduleResolution(bundlervsnode16vsnodenext): wrong choice silently breaks deep imports
What ships with it
10 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.
- eval-queries.json 4.2 KB
- evals.json 2.0 KB
- references/async-without-await.md 521 B
- references/avoid-eslint-disable.md 605 B
- references/env-access-bracket-notation.md 505 B
- references/numeric-separator-enforcement.md 396 B
- references/template-literals-require-string-conversion.md 393 B
- references/unbound-method-references.md 544 B
- references/unnecessary-async-keywords.md 536 B
- SOURCES.md 486 B
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.
- 3d ago First seen · 44 lines · 63 tokens per session scan A c906e80f3655
typescript-guide is a skill published in the GitHub repository xonovex/platform (5 stars, last pushed 5d ago), licensed MIT. It adds 63 tokens to every session and 828 once invoked, about $0.0003 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 2026-09-08.
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