agentmods.dev

worker-backend

worker-backend is a skill for Claude Code, Codex from bierlingm/spikes. It costs 30 tokens per session (1,301 once invoked), scanned A, original, MIT.

A set of procedures for changing the backend of a Cloudflare Worker, a small server-side program that runs on Cloudflare. It covers areas such as authentication, request checks, API keys, Stripe billing, database changes, and API endpoints.

In plain words
What is it for?
Use it to modify the listed Cloudflare Worker features, update its database schema, add validation, and test request-and-response behavior.
Why use it?
It gives backend changes a defined process, including writing tests first. This helps catch incorrect success and error behavior before changes are finished.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is { "command": "cd ../spikes-hosted/worker && npx vitest run", "exitCode": 0, "observation": "8 tests pass: hashPassword generates different hashes for same passw.

not rated 1repo 4d ago A scan 30 tokens original MIT

Good fit Use it to modify the listed Cloudflare Worker features, update its database schema, add validation, and test request-and-response behavior.

Compare 6 skills from other repositories ↓
View source ↗ bierlingm/spikes
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/bierlingm/spikes
agentmods
npx agentmods add skills/bierlingm/spikes/worker-backend

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for worker-backend

README.md
[![agentmods](https://agentmods.dev/badge/skills/bierlingm/spikes/worker-backend/github.svg)](https://agentmods.dev/skills/bierlingm/spikes/worker-backend)
Your own site
<a href="https://agentmods.dev/skills/bierlingm/spikes/worker-backend"><img src="https://agentmods.dev/badge/skills/bierlingm/spikes/worker-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.

agentmods 80×15 button for worker-backend

Your own site · 80×15
<a href="https://agentmods.dev/skills/bierlingm/spikes/worker-backend"><img src="https://agentmods.dev/badge/skills/bierlingm/spikes/worker-backend.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 30 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,301 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00030 $0.01301
Opus 5.5 $0.00012 $0.00520
Sonnet 5.5 $0.00006 $0.00260
Haiku 4.5 $0.00003 $0.00130

Measured 1mo ago against content hash 3c427f628e25, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

worker-backend 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 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

8. **Manually verify via wrangler dev.** Start `cd ../spikes-hosted/worker && npx wrangler dev --port 8787` and test the endpoint with curl. Verify the happy path and at least one error path.
.factory/skills/worker-backend/SKILL.md · 87 lines

How it starts

The opening of the file, as written. The whole thing — 87 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Backend Worker

NOTE: Startup and cleanup are handled by worker-base. This skill defines the WORK PROCEDURE.

When to Use This Skill

Features that modify the Cloudflare Worker backend at ../spikes-hosted/worker/. This includes:

  • API key system (creation, revocation, scoping, auth middleware)
  • Stripe metered billing (meters, meter events, budget enforcement)
  • Authentication endpoints
  • Stripe webhook handling (agent tier lifecycle)
  • Database schema changes (migrations)
  • API endpoint changes
  • Request validation (Zod schemas)

Work Procedure

  1. Read the feature description thoroughly. Understand preconditions and expected behavior.

  2. Understand current code. Read relevant source files in ../spikes-hosted/worker/src/. The worker may be a single index.ts (early milestones) or modularized (later milestones). Read schema.sql and any migrations to understand the database.

  3. Write tests FIRST (TDD). Create test files in ../spikes-hosted/worker/test/ using Vitest + Miniflare patterns:

    • Import env from cloudflare:test
    • Use SELF.fetch() to test request/response cycles
    • Seed D1 data in beforeEach
    • Test both success and error paths
    • Run tests: cd ../spikes-hosted/worker && npx vitest run — they MUST fail (red phase)

  4. Write database migrations if needed. Create numbered migration files in ../spikes-hosted/worker/migrations/. Migration names should be descriptive (e.g., 002_add_rate_limits_table.sql).

  5. Implement the feature. Make the tests pass (green phase). Follow existing patterns in the codebase. If modularizing, create new files in src/handlers/, src/middleware/, src/db/, or src/utils/.

  6. Run all tests. cd ../spikes-hosted/worker && npx vitest run — all tests must pass (not just new ones).

  7. Run typecheck. cd ../spikes-hosted/worker && npx tsc --noEmit — must pass with zero errors.

  8. Manually verify via wrangler dev. Start cd ../spikes-hosted/worker && npx wrangler dev --port 8787 and test the endpoint with curl. Verify the happy path and at least one error path.

Read the full file on GitHub · 87 lines

Changes

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.

  1. 1mo ago First seen · 87 lines · 30 tokens per session scan A 3c427f628e25

Subscribe to this mod's changes

worker-backend is a skill published in the GitHub repository bierlingm/spikes (1 stars, last pushed 4d ago), licensed MIT. It adds 30 tokens to every session and 1,301 once invoked, about $0.0001 per session on Opus 5.5. 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.

Backend and APIsSecurity
Related

Other skills, from other repositories

mem0-oss-to-platform

Plan, then execute, a migration of a project from the mem0 open-source / self-hosted SDK (local Memory class) to the mem0 Platform / hosted SDK (MemoryClient). TRIGGER when: the developer wants to move, switch, or migrate mem0 off OSS/self-hosted to the hosted API, e.g. "migrate my mem0 setup to the platform", "switch…

mem0ai/mem0 · 217 tokens

agui-dotnet-protobuf

Use the protobuf wire transport (instead of the default Server-Sent Events) for an AG-UI connection with the AG-UI .NET SDK — a compact binary event stream negotiated via the Accept header. USE FOR: making an AGUIChatClient prefer protobuf by wiring an AGUIEventStreamHandler with ProtobufEventStreamFormatter (then…

ag-ui-protocol/ag-ui · 162 tokens

azure-mgmt-botservice-dotnet

Azure Resource Manager SDK for Bot Service in .NET. Management plane operations for creating and managing Azure Bot resources, channels (Teams, DirectLine, Slack), and connection settings. Triggers: "Bot Service", "BotResource", "Azure Bot", "DirectLine channel", "Teams channel", "bot management .NET", "create bot".

microsoft/skills · 78 tokens

fastapi-router-py

Create FastAPI routers with CRUD operations, authentication dependencies, and proper response models. Use when building REST API endpoints, creating new routes, implementing CRUD operations, or adding authenticated endpoints in FastAPI applications.

microsoft/skills · 46 tokens

dev-runtime

How the Node side of a dev stack runs without haven, and the backend host: pnpm dev (UI built once, backend reloading), pnpm dev:hmr (adds the Vite ui lane), tools/dev-runtime (api + worker in one Node process), backend reload on a file change, the debounce (quiet window + max wait), ports derived from PORT. Use when…

langwatch/langwatch · 172 tokens

migrate-segw-to-rap

Reverse-engineer a SEGW-built OData V2 service (MPC/DPC/MPCEXT/DPCEXT) into a modern RAP V4 service — tables, CDS views (interface + projection), behavior definitions, draft entities, service definition + binding. Use when asked to "migrate this SEGW service to RAP", "convert OData V2 to V4 RAP", "modernize this…

arc-mcp/arc-1 · 106 tokens