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 rules/brendadeeznuts1111/betting-brain-v3/api-patternsgit clone --depth 1 https://github.com/brendadeeznuts1111/betting-brain-v3Wrote 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/brendadeeznuts1111/betting-brain-v3/api-patterns)<a href="https://agentmods.dev/rules/brendadeeznuts1111/betting-brain-v3/api-patterns"><img src="https://agentmods.dev/badge/rules/brendadeeznuts1111/betting-brain-v3/api-patterns.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 | $0.02671 | $0.02671 |
| Opus 5 | $0.01336 | $0.01336 |
| Sonnet 5 | $0.00534 | $0.00534 |
| Haiku 4.5 | $0.00267 | $0.00267 |
Grade A, and why
api-patterns 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 5d 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.
# Test with curl How it starts
The opening of the file, as written. The whole thing — 476 lines — stays where its author put it; the contents beside it link to each section on GitHub.
🔍 Code Searchability Patterns
Find api-patterns Issues with ast-grep
# Find async function $NAME(request: Request, env: Env, requestId: string)
# Find return createJSONResponse($$$)
# Find return createErrorResponse($$$)
# Find generateRequestId()
# Find createLogger($$$)
ast-grep --pattern 'async function $NAME(request: Request, env: Env, requestId: string)' src/
ast-grep --pattern 'return createJSONResponse($$$)' src/
ast-grep --pattern 'return createErrorResponse($$$)' src/
ast-grep --pattern 'generateRequestId()' src/
ast-grep --pattern 'createLogger($$$)' src/
sg -p 'async' src/
sg -p 'return' src/
sg -p 'return' src/
sg -p 'generateRequestId()' src/
sg -p 'createLogger($$$)' src/
api-patterns Discovery Commands
sg search "async function" src/api/
sg search "createJSONResponse" src/
sg search "generateRequestId" src/
sg search "createLogger" src/
Search Examples
# Find all API endpoint handlers
sg search 'async' src/
# Find JSON response patterns
sg search 'return' src/
# Find request ID generation
sg search 'return' src/
# Find logging patterns
sg search 'generateRequestId()' src/
Error Handling Patterns
Using Error Classes
Location: src/utils/error-handler.ts
import { Errors, createErrorResponse } from '../utils/error-handler';
// In endpoint handler
try {
// Validation error
if (!isValid) {
throw Errors.validationError(['Field is required']);
}
// Not found
if (!record) {
throw Errors.notFound('Event');
}
// Database error
if (queryFailed) {
throw Errors.databaseError('Query failed: ' + error.message);
}
// Success response
return new Response(JSON.stringify(data), {
headers: { 'Content-Type': 'application/json' }
});
} catch (error) {
return createErrorResponse(error, requestId, url.pathname);
}
Error Types
// Client errors (4xx)
Errors.badRequest(message, details?) // 400
Errors.unauthorized(message?) // 401
Errors.forbidden(message?) // 403
Errors.notFound(resource?) // 404
Errors.validationError(errors[]) // 400
Errors.rateLimit(message?) // 429
// Server errors (5xx)
Errors.databaseError(message) // 500
Errors.serviceUnavailable(message?) // 503
Errors.timeout(message?) // 504
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.
- 5d ago First seen · 476 lines · 2,671 tokens per session scan A a4517dbadede
api-patterns is a cursor rule published in the GitHub repository brendadeeznuts1111/betting-brain-v3 (8 stars, last pushed 11mo ago), licensed MIT. It adds 2,671 tokens to every session, about $0.0134 per session on Opus 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 2026-08-31.
Other cursor rules, from other repositories
workers-patterns
Skim this on every task that touches workers, env, routes, or bindings.
git-workflow
Cloud Agents MUST run git add, git commit, and git push before ending their response when they have made code changes. Do not end your turn without pushing. ALWAYS use Pull Requests instead of pushing directly to main.
typescript-imports
Golden rule: import each symbol from the module that defines it. A package index.ts may barrel only its own ./ modules — never another package.
new-env-var-checklist
Checklist when adding any new env secret/variable — Turbo globalEnv, GitHub sync, workflow maps, Alchemy bindings. Prevents "secret synced but worker never gets it".
project-init
When the user has not yet personalized a copy of this monorepo, help them before building features.
realtime-websockets
Socka-first Durable Object WebSockets, SSR-safe client URLs, no fake localhost. Use for durable-objects/, apps/web, WebSocket forwarding, or @firtoz/socka.