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 serac-labs/serac --skill es5-compliancegit clone --depth 1 https://github.com/serac-labs/seracWrote 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/serac-labs/serac/es5-compliance)<a href="https://agentmods.dev/skills/serac-labs/serac/es5-compliance"><img src="https://agentmods.dev/badge/skills/serac-labs/serac/es5-compliance/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/serac-labs/serac/es5-compliance"><img src="https://agentmods.dev/badge/skills/serac-labs/serac/es5-compliance.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00870 |
| Opus 5.5 | $0.00020 | $0.00348 |
| Sonnet 5.5 | $0.00010 | $0.00174 |
| Haiku 4.5 | $0.00005 | $0.00087 |
Grade A, and why
es5-compliance 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 — 124 lines — stays where its author put it; the contents beside it link to each section on GitHub.
ES5 Compliance for ServiceNow
ServiceNow runs on Mozilla Rhino engine which only supports ES5 JavaScript (2009 standard). All server-side scripts MUST use ES5 syntax.
Forbidden Syntax (WILL CAUSE SyntaxError)
| ES6+ Syntax | ES5 Alternative |
|---|---|
const x = 5 |
var x = 5 |
let items = [] |
var items = [] |
() => {} |
function() {} |
`Hello ${name}` |
'Hello ' + name |
for (x of arr) |
for (var i = 0; i < arr.length; i++) |
{a, b} = obj |
var a = obj.a; var b = obj.b; |
[a, b] = arr |
var a = arr[0]; var b = arr[1]; |
...spread |
Use Array.prototype.slice.call() |
class MyClass {} |
Use constructor functions |
async/await |
Use GlideRecord callbacks |
Promise |
Use GlideRecord with callbacks |
Common Patterns
Variable Declarations
// WRONG - ES6
const MAX_RETRIES = 3
let currentUser = gs.getUser()
// CORRECT - ES5
var MAX_RETRIES = 3
var currentUser = gs.getUser()
Functions
// WRONG - Arrow functions
var active = incidents.filter((inc) => inc.active)
var process = () => {
return "done"
}
// CORRECT - ES5 functions
var active = []
for (var i = 0; i < incidents.length; i++) {
if (incidents[i].active) {
active.push(incidents[i])
}
}
var process = function () {
return "done"
}
String Concatenation
// WRONG - Template literals
var message = `Incident ${number} assigned to ${user}`
// CORRECT - String concatenation
var message = "Incident " + number + " assigned to " + user
Loops
// WRONG - for...of
for (var item of items) {
gs.info(item)
}
// CORRECT - Traditional for loop
for (var i = 0; i < items.length; i++) {
gs.info(items[i])
}
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 · 124 lines · 49 tokens per session scan A aa3c10542bac
es5-compliance is a skill published in the GitHub repository serac-labs/serac (78 stars, last pushed 5d ago), licensed Apache-2.0. It adds 49 tokens to every session and 870 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 2026-08-30.
Other skills, from other repositories
model-context
MCP (Model Context Protocol) - Build AI-native servers with tools, resources, and prompts. TypeScript/Python SDKs for Claude Desktop integration.
sn-safe-write
Change ServiceNow data safely — plan first, apply only after review, verify, and know how to revert. Use whenever a create, update, upsert or delete on an instance is requested.
sn-discover
Map a ServiceNow instance into Markdown (version and counts, custom applications, per-scope tables and artefacts) with the server's own document generator. Use when asked to discover, survey, inventory or document an instance or its custom apps.
sn-triage
Triage a ServiceNow incident or a failing behaviour — instance health, recent errors, what automation runs on the table, and what changed on the record. Use when something is broken, slow or erroring on an instance.
sn-uib
Review a ServiceNow UI Builder (UIB) experience or workspace page — its page map, what a change would touch, data broker security and page weight. Use when asked to explain, audit or assess a UI Builder page, workspace or experience before changing it.
sn-security
Review the security posture of a ServiceNow instance — the ACL scan, hardening properties and cross-scope access — or explain why one user can or cannot read, write, create or delete a table, record or field. Use for a security review, a hardening check, or a "why can't this user see / edit it" question.