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 kensaurus/cursor-kenji --skill audit-fe-apigit clone --depth 1 https://github.com/kensaurus/cursor-kenjiWrote 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/kensaurus/cursor-kenji/audit-fe-api)<a href="https://agentmods.dev/skills/kensaurus/cursor-kenji/audit-fe-api"><img src="https://agentmods.dev/badge/skills/kensaurus/cursor-kenji/audit-fe-api.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 5.1 | $0.00052 | $0.03294 |
| Opus 5 | $0.00026 | $0.01647 |
| Sonnet 5 | $0.00010 | $0.00659 |
| Haiku 4.5 | $0.00005 | $0.00329 |
Grade A, and why
audit-fe-api scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 455 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Frontend API Audit Skill
Degree of freedom: MIXED — Steps 0, 1, 3–6 [HIGH freedom]; Step 2
Sentry queries and schema SQL [LOW freedom — run exactly].
How to reason
- Observe — quote the FE call site, BE route, and response/error
- Interpret — does the contract match (path, method, params, types)?
- Classify — missing route / mismatch / untyped / cache-gap / correct
- Severity — 404/401/type-mismatch in prod = Critical; cache/prefetch = opportunity
Worked example
Observe:
useUserGETs/api/users/${id}; noapp/api/users/[id]/route.ts; Sentry 25× 404 in 14d. Interpret: FE calls a route the BE never registered. Classify: missing route (Critical). Severity: Critical — guaranteed 404. Finding:hooks/useUser.ts| GET/api/users/:id| Critical | no BE route.
Self-critique before reporting [LOW freedom — do not skip]
- Evidenced — FE file + BE route or Sentry event, not "probably 500"
- Contract, not taste — staleTime advice needs a freshness reason
- Severity justified — Critical = broken contract in prod
- Right owner — live 4xx/5xx repro →
debug-fe-be-integration; DB shape →audit-db-schema - Both sides named — every mismatch lists FE file and BE path (or NOT FOUND)
Step 0: Auto-Detect API Layer
0a. Detect Frontend Stack
| Dependency | Technology |
|---|---|
@tanstack/react-query |
TanStack Query (React Query) |
swr |
SWR |
@reduxjs/toolkit with createApi |
RTK Query |
axios |
Axios HTTP client |
ky |
Ky HTTP client |
ofetch or $fetch |
Nuxt/ofetch |
@trpc/client |
tRPC (type-safe RPC) |
graphql-request or @apollo/client |
GraphQL |
openapi-fetch or openapi-typescript |
OpenAPI typed client |
0b. Detect Backend Stack
Glob: **/app/api/**/route.ts → Next.js App Router API routes
Glob: **/pages/api/**/*.ts → Next.js Pages Router API routes
Glob: **/src/routes/**/*.ts → Express/Hono/Fastify routes
Glob: **/server/api/**/*.ts → Nuxt server routes
Glob: **/src/app.py → Flask/Django
Glob: **/main.go → Go backend
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.
- 3d ago First seen · 455 lines · 52 tokens per session scan A 89b28be41f85
audit-fe-api is a skill published in the GitHub repository kensaurus/cursor-kenji (9 stars, last pushed 9d ago), licensed MIT. It adds 52 tokens to every session and 3,294 once invoked, about $0.0003 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 2026-09-03.
Other skills, from other repositories
devlab-contract-web-server
A guide for agreeing on how a separate frontend and backend communicate through APIs. An API contract defines field types, optional values, data formatting, error codes, and which configuration belongs on each side.
FAQ Generator
Generates a comprehensive FAQ section for any product, API, or documentation page.
chat-viewer
A design for displaying WeCom chat records. WeCom is an enterprise messaging platform; the service syncs and decrypts messages, downloads media, and can turn voice messages into text.
react-server-components
Implements React Server Components (RSC) patterns with Next.js App Router including data fetching, streaming, selective hydration, and server/client composition. Use when users request "server components", "RSC", "Next.js app router", "server-side rendering", or "streaming".
extract-source-sample
Given the path to a finished content-goose ad-run folder, extract everything that defines that ad — recipe shot list, VO script, characters, voices, world, atom-skills, master mp4 — and emit a source-sample.json in the exact shape the upload-ad-sample skill writes to the Goose Ads library. Also links every character…
frontend
Builds, styles, and polishes web UI and UX. Use for any frontend, page, component, styling, layout, animation, or visual-quality task, or when asked to make an interface look or feel a certain way.