new-siteadmin-api

new-siteadmin-api is a skill for Claude Code, Codex from authgear/authgear-server. It costs 43 tokens per session (2,263 once invoked), scanned A, original, Apache-2.0.

A staged workflow for adding a Site Admin API feature, from designing its OpenAPI description to generating models and connecting the service handler. OpenAPI is a standard format for describing HTTP APIs.

In plain words
What is it for?
Use it when adding a new endpoint or replacing a placeholder with real data in the Site Admin service.
Why use it?
It keeps the API design, generated code, implementation, and user approvals in a defined order instead of mixing them together.

Skill for Claude CodeCodex

Install

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.

agentmods
npx agentmods add skills/authgear/authgear-server/new-siteadmin-api
Any agent
npx skills add authgear/authgear-server --skill new-siteadmin-api
Clone the repo
git clone --depth 1 https://github.com/authgear/authgear-server

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 new-siteadmin-api

README.md
[![agentmods](https://agentmods.dev/badge/skills/authgear/authgear-server/new-siteadmin-api.svg)](https://agentmods.dev/skills/authgear/authgear-server/new-siteadmin-api)
Your own site
<a href="https://agentmods.dev/skills/authgear/authgear-server/new-siteadmin-api"><img src="https://agentmods.dev/badge/skills/authgear/authgear-server/new-siteadmin-api.svg" alt="Measured on agentmods" height="20"></a>
Per session 43 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,263 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00043 $0.02263
Opus 5 $0.00022 $0.01131
Sonnet 5 $0.00009 $0.00453
Haiku 4.5 $0.00004 $0.00226

Measured 4d ago against content hash b9b2c1bce614, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

new-siteadmin-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 4d 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.

.claude/skills/new-siteadmin-api/SKILL.md · 232 lines

How it starts

The opening of the file, as written. The whole thing — 232 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Add a new Site Admin API feature: $ARGUMENTS

Follow the stages below in order. Confirm with the user before moving from one stage to the next.


Stage 1: Design and confirm OpenAPI spec

Add the endpoint to docs/api/siteadmin-api.yaml:

  • Add the path under paths: with appropriate HTTP method(s)
  • Use $ref: "#/components/responses/BadRequest", Forbidden, NotFound for error responses
  • Add any new request/response schemas to components/schemas:
  • Follow existing conventions: snake_case fields, hyphenated paths, format: date for date strings

Stop here. Present the spec diff to the user and wait for confirmation before proceeding.


Stage 2: Generate models

make generate

Avoid external type imports: pkg/siteadmin/model/oapi-codegen.yaml maps format: datestring and format: emailstring so that no github.com/oapi-codegen/runtime/types import is generated. If you add a new OpenAPI format that would otherwise pull in an external type, add a mapping to output-options.type-mapping in that file before regenerating.

Commit: "[Site Admin] Generate models for <feature>"


Stage 3: Create and wire the handler file

Create pkg/siteadmin/transport/handler_<name>.go. No dummy data — leave ServeHTTP as a stub that returns http.NotFound:

package transport

import "net/http"

func Configure<Name>Route(route httproute.Route) httproute.Route {
    return route.WithMethods("OPTIONS", "GET"). // always include "OPTIONS" for CORS preflight
        WithPathPattern("/api/v1/...")
}

type <Name>Handler struct {
    // Service dependencies added in Stage 5
}

type <Name>Params struct {
    // path and query params
}

func parse<Name>Params(r *http.Request) (<Name>Params, error) {
    // parse path params via httproute.GetParam(r, "paramName")
    // query params: use helpers from params.go (getIntParam, getDateParam, etc.)
    // POST body: decode JSON, validate with validation.NewSimpleSchema
}

func (h *<Name>Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
    _, err := parse<Name>Params(r)
    if err != nil {
        writeError(w, r, err)
        return
    }
    http.NotFound(w, r)
}

Read the full file on GitHub · 232 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. 4d ago First seen · 232 lines · 43 tokens per session scan A b9b2c1bce614

Subscribe to this mod's changes

new-siteadmin-api is a skill published in the GitHub repository authgear/authgear-server (2,017 stars, last pushed 2d ago), licensed Apache-2.0. It adds 43 tokens to every session and 2,263 once invoked, about $0.0002 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 2026-08-30.

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