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 wyattowalsh/agents --skill javascript-conventionsgit clone --depth 1 https://github.com/wyattowalsh/agentsWrote 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/wyattowalsh/agents/javascript-conventions)<a href="https://agentmods.dev/skills/wyattowalsh/agents/javascript-conventions"><img src="https://agentmods.dev/badge/skills/wyattowalsh/agents/javascript-conventions/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/wyattowalsh/agents/javascript-conventions"><img src="https://agentmods.dev/badge/skills/wyattowalsh/agents/javascript-conventions.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 | $0.00053 | $0.02243 |
| Opus 5.5 | $0.00021 | $0.00897 |
| Sonnet 5.5 | $0.00011 | $0.00449 |
| Haiku 4.5 | $0.00005 | $0.00224 |
Grade A, and why
javascript-conventions 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 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.
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 — 160 lines — stays where its author put it; the contents beside it link to each section on GitHub.
JavaScript/TypeScript Conventions
Apply these conventions when JavaScript, TypeScript, Node.js tooling, or
package.json is the primary workstream.
Dispatch
| $ARGUMENTS | Action |
|---|---|
| Active (auto-invoked when JS/TS work is primary) | Apply the operator contract below |
| Empty | Display the convention summary and routing guidance |
check |
Verify tooling compliance only |
Reference File Index
| File | Purpose | When to Read |
|---|---|---|
references/tooling-contract.md |
Required package-manager, command, CI, workspace, and package-root rules | Package commands, scripts, dependencies, lockfiles, or CI |
references/redirection-boundaries.md |
When JS/TS conventions should yield to Python, shell, CI, or framework-specific skills | Mixed-language or ambiguous work |
references/edge-cases.md |
Exception gates for npm/yarn, Corepack, generated apps, and migrations | Deviations from pnpm defaults |
references/typescript-patterns.md |
TypeScript config, narrowing, type guards, unions, and type-test patterns | TypeScript code or tsconfig.json |
references/eslint-prettier.md |
ESLint flat config, typed linting, and Prettier separation | Linting or formatting changes |
Operator Contract
Active
- Apply this skill only when JS/TS files, Node tooling, or
package.jsonare the primary surface of the task. - Read
references/redirection-boundaries.mdwhen JS/TS appears alongside Python, shell, CI, or framework-specific work. - Enforce the hard requirements in
references/tooling-contract.mdfor package management, package-root selection, command execution, lockfiles, workspaces, and CI installs. - Check
references/edge-cases.mdbefore recommending npm, yarn, global package managers, Corepack assumptions, or lockfile migrations. - Read
references/typescript-patterns.mdfor TypeScript config or type-safety changes. - Read
references/eslint-prettier.mdfor linting, typed linting, or formatting changes. - Use guided preferences only when starting new work or when the repo does not already have a stronger local convention.
What ships with it
14 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.
- evals/evals.json 6.1 KB
- references/edge-cases.md 4.0 KB
- references/eslint-prettier.md 1.8 KB
- references/redirection-boundaries.md 2.2 KB
- references/tooling-contract.md 3.5 KB
- references/typescript-patterns.md 5.3 KB
- scripts/asset_toolkit/__init__.py 303 B runs code
- scripts/asset_toolkit/_shared.py 5.6 KB runs code
- scripts/asset_toolkit/common.py 3.0 KB runs code
- scripts/asset_toolkit/package.py 43 KB runs code
- scripts/asset_toolkit/validate_evals.py 11 KB runs code
- scripts/asset_toolkit/validate_hooks.py 13 KB runs code
- scripts/asset_toolkit/validate_skill.py 3.6 KB runs code
- scripts/check.py 1.5 KB runs code
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 First seen · 160 lines · 53 tokens per session scan A 3f02e360bf28
javascript-conventions is a skill published in the GitHub repository wyattowalsh/agents (5 stars, last pushed 1mo ago), licensed MIT. It adds 53 tokens to every session and 2,243 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 2026-09-03.
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