verify-feature

verify-feature is a skill for Claude Code, Codex from antosubash/SimpleModule. It costs 96 tokens per session (1,574 once invoked), scanned A, original, MIT.

End-to-end verification of a feature implementation before opening a PR. Starts the SimpleModule.Host (killing port 5001 if occupied), drives the feature in a real browser via playwright-cli, runs every local CI step, and only then opens a pull request. Use when the user asks to "verify the feature", "test and ship"…

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/antosubash/simplemodule/verify-feature
Any agent
npx skills add antosubash/SimpleModule --skill verify-feature
Clone the repo
git clone --depth 1 https://github.com/antosubash/SimpleModule

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 verify-feature

README.md
[![agentmods](https://agentmods.dev/badge/skills/antosubash/simplemodule/verify-feature.svg)](https://agentmods.dev/skills/antosubash/simplemodule/verify-feature)
Your own site
<a href="https://agentmods.dev/skills/antosubash/simplemodule/verify-feature"><img src="https://agentmods.dev/badge/skills/antosubash/simplemodule/verify-feature.svg" alt="Measured on agentmods" height="20"></a>
Per session 96 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,574 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00096 $0.01574
Opus 5 $0.00048 $0.00787
Sonnet 5 $0.00019 $0.00315
Haiku 4.5 $0.00010 $0.00157

Measured today against content hash 4dcac2871296, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

verify-feature 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 today.

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.

**Wait for readiness.** Poll the health endpoint with curl (`-k` because the cert is self-signed) until it returns 200, then continue. Cap the wait at 90 seconds.
.claude/skills/verify-feature/SKILL.md · 159 lines

How it starts

The opening of the file, as written. The whole thing — 159 lines — stays where its author put it; the contents beside it link to each section on GitHub.

verify-feature

Run this skill after a feature is implemented and committed locally. It is a gated pipeline — each stage must pass before the next runs. If any stage fails, stop, surface the failure, and do NOT open a PR.

Inputs to gather first

Before starting, confirm these from conversation context (do not ask the user unless missing):

  • Feature description — what was implemented (used to pick the page and assertions for stage 2)
  • Page route — the Inertia route (e.g. AuditLogs/Browse) or URL path to exercise
  • Branch — current branch (must not be main)

If route/path is unknown, grep the diff for Inertia.Render("...") calls to infer it.

Stage 1 — Start the application

The host listens on https://localhost:5001 (see CLAUDE.md). Free the port if held, then start the app in the background.

# 1. Kill anything bound to 5001 (TCP). lsof returns nothing if the port is free.
PORT_PIDS=$(lsof -ti tcp:5001 2>/dev/null || true)
if [ -n "$PORT_PIDS" ]; then
  echo "Port 5001 occupied by PID(s): $PORT_PIDS — killing"
  kill -9 $PORT_PIDS
  sleep 1
fi

# 2. Start the host. Use Bash with run_in_background=true so the process keeps running.
dotnet run --project template/SimpleModule.Host

Run the dotnet run command via Bash with run_in_background: true. Capture the shell ID — you will need it to stop the app later.

Wait for readiness. Poll the health endpoint with curl (-k because the cert is self-signed) until it returns 200, then continue. Cap the wait at 90 seconds.

for i in $(seq 1 45); do
  if curl -sk -o /dev/null -w "%{http_code}" https://localhost:5001/ | grep -qE '^(200|302|401)$'; then
    echo "App is up"; break
  fi
  sleep 2
done

If readiness times out, read the background shell's output, surface the error, and abort the skill.

Stage 2 — Verify the feature with playwright-cli

Use the playwright-cli skill's commands directly (already documented in .claude/skills/playwright-cli/SKILL.md). The cert is self-signed; open with --ignore-https-errors via the run-code escape if needed, otherwise just navigate — playwright-cli accepts self-signed certs by default.

Read the full file on GitHub · 159 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. today First seen · 159 lines · 96 tokens per session scan A 4dcac2871296

Subscribe to this mod's changes

verify-feature is a skill published in the GitHub repository antosubash/SimpleModule (5 stars, last pushed yesterday), licensed MIT. It adds 96 tokens to every session and 1,574 once invoked, about $0.0005 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 2026-09-04.

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