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 irahardianto/awesome-agv --skill typescript-idiomsgit clone --depth 1 https://github.com/irahardianto/awesome-agvWrote 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/irahardianto/awesome-agv/typescript-idioms)<a href="https://agentmods.dev/skills/irahardianto/awesome-agv/typescript-idioms"><img src="https://agentmods.dev/badge/skills/irahardianto/awesome-agv/typescript-idioms/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/irahardianto/awesome-agv/typescript-idioms"><img src="https://agentmods.dev/badge/skills/irahardianto/awesome-agv/typescript-idioms.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 10 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Agent Snooping · line 13 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
- medium Agent Snooping · line 640 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
- medium Agent Snooping · line 16 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
- medium Agent Snooping · line 17 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
- medium Agent Snooping · line 643 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
- medium Agent Snooping · line 641 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
- medium Agent Snooping · line 642 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
- medium Agent Snooping · line 644 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
- medium Agent Snooping · line 645 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
- medium Agent Snooping · line 646 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
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 | $0.00049 | $0.06146 |
| Opus 5.5 | $0.00020 | $0.02458 |
| Sonnet 5.5 | $0.00010 | $0.01229 |
| Haiku 4.5 | $0.00005 | $0.00615 |
Grade A, and why
typescript-idioms scanned grade A with 1 finding 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
const response = await fetch(url, { signal: controller.signal }); How it starts
The opening of the file, as written. The whole thing — 644 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Core Philosophy
TypeScript's type system is your documentation, your test, and your specification — all at once. Make the type system encode the invariants of your domain so that invalid states are unrepresentable. Lean into the compiler.
Scope: This file covers TypeScript-specific type system and language idioms. For framework-specific patterns, see the respective idiom skill (Vue, React, Angular, Next.js, Hono). For file layout, see
references/project-structure.md. For detailed safety, SAST patterns, and performance patterns, seereferences/ts-patterns-and-anti-patterns.md. For quality commands, see@.agents/rules/code-idioms-and-conventions.md. For logging library, see@.agents/skills/logging-implementation/SKILL.md.
Loading guards:
- Plain JavaScript (no
tsconfig.json): load@.agents/skills/javascript-idioms/SKILL.mdinstead — this skill assumes strict-mode TS.- Hono backend:
honohas no repo-level marker file, so it is not auto-detected. Ifhonoappears inpackage.jsondependencies, co-load@.agents/skills/hono-idioms/SKILL.mdalongside this skill.- Test-file naming diverges by framework: see
references/project-structure.md§ Test Organization for the reconciliation rule before creating test files.
When to Load References
Load these before writing code in the matching context — not after.
| Situation | Reference to Load |
|---|---|
| Starting a new project or setting up file layout | references/project-structure.md |
| Choosing packages, tsconfig template, or vitest config | references/recommended-dependencies.md |
| Writing code that handles user input, async operations, or I/O | references/ts-patterns-and-anti-patterns.md |
| Defining Zod schemas or validating API/env boundaries | references/zod-patterns.md |
Toolchain and Runtime
- Default to latest Node.js LTS. As of July 2026, Node.js 24 LTS with TypeScript 5.8+
- ESM over CJS for all new projects
tsxfor development execution (replaces ts-node)- Key version milestones: TS 5.0+ decorators, TS 5.4+ NoInfer, TS 5.5+ inferred type predicates
What ships with it
4 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.
- 1mo ago Changed · -3 lines · +24 tokens per session a0b685e65260
- 1mo ago First seen · 647 lines · 25 tokens per session scan A cbd151bb87b8
typescript-idioms is a skill published in the GitHub repository irahardianto/awesome-agv (156 stars, last pushed 13d ago), licensed MIT. It adds 49 tokens to every session and 6,146 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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