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.
git clone --depth 1 https://github.com/chooomedia/keymojiWrote 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/rules/chooomedia/keymoji/api-backend)<a href="https://agentmods.dev/rules/chooomedia/keymoji/api-backend"><img src="https://agentmods.dev/badge/rules/chooomedia/keymoji/api-backend/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/rules/chooomedia/keymoji/api-backend"><img src="https://agentmods.dev/badge/rules/chooomedia/keymoji/api-backend.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 | $0.00000 | $0.00660 |
| Opus 5.5 | $0.00000 | $0.00264 |
| Sonnet 5.5 | $0.00000 | $0.00132 |
| Haiku 4.5 | $0.00000 | $0.00066 |
Grade A, and why
api-backend 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 — 66 lines — stays where its author put it; the contents beside it link to each section on GitHub.
API, Backend & Storage Patterns
API Calls — Pflichtregeln
- IMMER
cachedFetch/cachedFetchAccountausutils/apiCache.js - KEINE direkten
fetch()Calls außer inapiCache.js - KEINE doppelten API-Calls — Daten zwischen Komponenten weitergeben
- IMMER try/catch mit user-freundlichen Error Messages
- IMMER Loading States
Authentication (OTP / Magic Link)
secureLoginWithMagicLink()— Login initiierensecureVerifyOTP()/secureVerifyMagicLink()— Code verifizieren- Session Validation vor jeder Account-Operation
- Cross-Tab Communication via
BroadcastChannel
Account Management
accountStore.js— einziger Ort für Account-OperationensyncAccountData()nach Login/Update aufrufencurrentAccountStore = Single Source of Truth- Vor jedem API-Call:
prepareMetadataForAPI()ausmetadataCleaner.ts
n8n / Google Sheets
WEBHOOKSausconfig/api.jsverwenden — nie URLs hardcoden- Actions:
"get"/"read"= read-only (kein Sheets-Write),"update"/"create"= Upsert - Google Sheets Spalten (Top-Level, NICHT in
metadata):userId,email,tier,createdAt,lastLogin,profile,dailyUsage,metadata,status
metadataJSON enthält:settings,updatedAt,updatedVia,lastSettingsSaveprofileJSON enthält:name,avatardailyUsageJSON:{ date, used, storyUsed, limit, lastReset }
localStorage / Storage
- IMMER
storageHelpersausconfig/storage.js - IMMER
STORAGE_KEYSKonstanten — nie String-Literals DAILY_USAGE_HISTORY= lokale Chart-History (kein API-Feld!)- Quota-Exceeded-Errors immer abfangen
Daily Usage / Chart
dailyUsageStore.js— Zähler für heute, API-SyncuserDataStore.js—persistDailyUsageToHistory()nach jedem Increment- Chart liest aus
localStorage.DAILY_USAGE_HISTORY— keinmetadata.usageHistory action: "update"sendetdailyUsageals Top-Level Feld, NICHT inmetadata
Performance
cachedFetchmit TTL für alle API-Calls- Debouncing für User Input
- Lazy Loading für große Komponenten
$derivedfür abgeleitete Werte,$effectfür Side Effects
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 · 66 lines · 0 tokens per session scan A 489d4c988db7
api-backend is a cursor rule published in the GitHub repository chooomedia/keymoji (2 stars, last pushed 3mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 660 tokens. 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 2026-08-31.
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