A reference guide for building Hono web applications on Cloudflare Workers. Hono is a small web framework, and Cloudflare Workers run code at Cloudflare's edge servers.

Use it when composing Hono routes, adding middleware or request validation, typing environment bindings, serving a single-page app, using its remote procedure call features, or testing Workers.

It helps structure multiple apps, middleware, validation, errors, browser fallbacks, and tests correctly in a Workers environment.

hono-ops — Skill for Claude Code by 0xDarkMatter

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/0xDarkMatter/claude-mods

agentmods

npx agentmods add skills/0xdarkmatter/claude-mods/hono-ops

Made for: Claude Code.

Or install claude-mods, the plugin that ships this one along with the rest of its 103 skills, 3 commands, 3 agents, 4 hooks.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/0xdarkmatter/claude-mods/hono-ops/github.svg)](https://agentmods.dev/skills/0xdarkmatter/claude-mods/hono-ops)

Your own site

<a href="https://agentmods.dev/skills/0xdarkmatter/claude-mods/hono-ops"><img src="https://agentmods.dev/badge/skills/0xdarkmatter/claude-mods/hono-ops/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/0xdarkmatter/claude-mods/hono-ops"><img src="https://agentmods.dev/badge/skills/0xdarkmatter/claude-mods/hono-ops.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 61 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 3,697 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. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

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.

Model	Per session	Once invoked
Fable 5.1	$0.00061	$0.03697
Opus 5	$0.00030	$0.01849
Sonnet 5	$0.00012	$0.00739
Haiku 4.5	$0.00006	$0.00370

Measured 9d ago against content hash e8cfa6a9802c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

hono-ops 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 9d ago.

The scan reads SKILL.md. This mod also ships 6 executable files (assets/vitest.config.template.ts, assets/worker-template.ts, scripts/check-hono-facts.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

app.all('*', (c) => c.env.ASSETS.fetch(c.req.raw)); // SPA fallback, LAST

skills/hono-ops/SKILL.md · 287 lines

How it starts

The opening of the file, as written. The whole thing — 287 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Hono Operations

Hono on Cloudflare Workers: composing multi-app APIs in one Worker, middleware discipline, typed errors, validation at the HTTP boundary, SPA co-serving, RPC clients, and testing under vitest-pool-workers. Patterns here are distilled from a production multi-tenant Worker (one Hono app, 6+ mounted sub-apps, ~1350 tests).

Verified against Hono v4 (2026). Workers-first; the Node/Bun/Deno deltas and porting checklist live in references/runtime-adapters.md.

Staleness check: python scripts/check-hono-facts.py --offline asserts the version-bearing facts (Hono major, @hono/zod-validator, @cloudflare/vitest-pool-workers) are still named in the prose and the dated currency note above is present; --live confirms each package's npm major still matches. Catalog: assets/hono-facts.json.

Decision Tree

What are you doing with Hono?
│
├─ Structuring an app (generics, sub-apps, env typing)
│  └─ Below + references/app-composition.md
│
├─ Middleware (ordering, auth, headers, exclusion boundaries)
│  └─ Below + references/middleware.md
│
├─ Errors / 404s / request validation
│  └─ Below + references/errors-validation.md
│
├─ Path syntax, routers, c.req/c.res surface, cookies
│  └─ references/routing-and-request.md
│
├─ Serving a SPA / static assets from the same Worker
│  └─ references/workers-runtime.md
│
├─ Cron / queues alongside fetch; runtime gotchas
│  └─ references/workers-runtime.md
│
├─ Streaming / SSE / WebSockets / proxying / service bindings
│  └─ references/streaming-and-realtime.md
│
├─ Durable Objects (Hono in a DO, hibernated WS, alarms)
│  └─ references/durable-objects.md
│
├─ OpenAPI docs from routes (@hono/zod-openapi)
│  └─ references/openapi.md
│
├─ Server-rendered HTML / JSX / HTML emails
│  └─ references/jsx-ssr.md
│
├─ Running or porting to Node / Bun / Deno
│  └─ references/runtime-adapters.md
│
├─ Typed client (hc RPC vs hand-rolled)
│  └─ references/rpc-clients.md
│
├─ Testing (app.request, pool-workers, middleware isolation)
│  └─ references/testing.md + assets/vitest.config.template.ts
│
├─ Starting a new Worker from scratch
│  └─ assets/worker-template.ts (commented composition-root skeleton)
│
└─ Auditing an existing app's routes / middleware order
   └─ scripts/route-inventory.py (below)

Read the full file on GitHub · 287 lines

Files

What ships with it

19 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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.

9d ago First seen · 287 lines · 61 tokens per session scan A e8cfa6a9802c

Subscribe to this mod's changes

hono-ops is a skill published in the GitHub repository 0xDarkMatter/claude-mods (34 stars, last pushed 16d ago), licensed MIT. It adds 61 tokens to every session and 3,697 once invoked, about $0.0003 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 2026-08-30.

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hono-ops