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/elbwalker/walkeros/walkeros-mapping-configurationnpx skills add elbwalker/walkerOS --skill walkeros-mapping-configurationgit clone --depth 1 https://github.com/elbwalker/walkerOSWrote 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/elbwalker/walkeros/walkeros-mapping-configuration)<a href="https://agentmods.dev/skills/elbwalker/walkeros/walkeros-mapping-configuration"><img src="https://agentmods.dev/badge/skills/elbwalker/walkeros/walkeros-mapping-configuration.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 | $0.00035 | $0.01855 |
| Opus 5 | $0.00017 | $0.00928 |
| Sonnet 5 | $0.00007 | $0.00371 |
| Haiku 4.5 | $0.00003 | $0.00186 |
Grade A, and why
walkeros-mapping-configuration 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 — 330 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Mapping Configuration Recipes
Prerequisites
Read understanding-mapping first for core concepts.
Quick Reference
| I want to... | Use this pattern |
|---|---|
| Rename event | { name: 'new_name' } |
| Extract nested value | 'data.nested.value' |
| Set static value | { value: 'USD' } |
| Transform value | { fn: (e) => transform(e) } |
| Build object | { map: { key: 'source' } } |
| Process array | { loop: ['source', { map: {...} }] } |
| Gate by consent | { key: 'data.email', consent: { marketing: true } } |
| First defined value (fallback) | [{ key: 'data.sku' }, { key: 'data.id' }] |
| Add a field to a default rule | { extend: { data: { map: { x: 'path' } } } } |
| Drop a field from output | { remove: ['field.path'] } |
Common Recipes
GA4 / gtag
Product view → view_item:
product: {
view: {
name: 'view_item',
data: {
map: {
currency: { value: 'USD' },
value: 'data.price',
items: {
loop: [
'nested',
{
map: {
item_id: 'data.id',
item_name: 'data.name',
item_category: 'data.category',
price: 'data.price',
quantity: { value: 1 },
},
},
],
},
},
},
},
}
Order complete → purchase:
order: {
complete: {
name: 'purchase',
data: {
map: {
transaction_id: 'data.orderId',
value: 'data.total',
currency: 'data.currency',
items: {
loop: [
'nested',
{
map: {
item_id: 'data.id',
item_name: 'data.name',
price: 'data.price',
quantity: 'data.quantity',
},
},
],
},
},
},
},
}
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 · 330 lines · 35 tokens per session scan A d0b7186d01e3
walkeros-mapping-configuration is a skill published in the GitHub repository elbwalker/walkerOS (343 stars, last pushed yesterday), licensed MIT. It adds 35 tokens to every session and 1,855 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 2026-08-30.
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