repro-public

repro-public is a skill for Claude Code, Codex from emdash-cms/emdash. It costs 48 tokens per session (1,136 once invoked), scanned A, original, MIT.

A procedure for reproducing bugs on the public-facing website—the pages anonymous visitors see—using a running demo, browser interaction, screenshots, and a replayable record. It does not cover the administration area.

In plain words
What is it for?
Use it to investigate public page rendering, routes, sitemaps, RSS feeds, images, or visitor-facing query behavior, and to capture a repeatable reproduction.
Why use it?
It creates clear evidence of a visible bug without relying on a fragile automated browser test or changing the issue tracker and repository.

Skill for Claude CodeCodex

About the project

EmDash is a content management system for creating and managing websites, built with TypeScript and Astro and deployable on Cloudflare or Node.js with SQLite. It is for site owners and developers who want WordPress-like administration, templates, and plugins without PHP or separate hosting.

emdash-cms/emdash · 12,217 stars · on GitHub

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/emdash-cms/emdash/repro-public
Any agent
npx skills add emdash-cms/emdash --skill repro-public
Clone the repo
git clone --depth 1 https://github.com/emdash-cms/emdash

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 repro-public

README.md
[![agentmods](https://agentmods.dev/badge/skills/emdash-cms/emdash/repro-public.svg)](https://agentmods.dev/skills/emdash-cms/emdash/repro-public)
Your own site
<a href="https://agentmods.dev/skills/emdash-cms/emdash/repro-public"><img src="https://agentmods.dev/badge/skills/emdash-cms/emdash/repro-public.svg" alt="Measured on agentmods" height="20"></a>
Per session 48 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,136 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 $0.00048 $0.01136
Opus 5 $0.00024 $0.00568
Sonnet 5 $0.00010 $0.00227
Haiku 4.5 $0.00005 $0.00114

Measured 5d ago against content hash 47f3fc2fc744, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

repro-public 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 5d 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.

6. **Inspect the rendered output.** `agent-browser snapshot -i -c` for the accessibility tree; `agent-browser get text @e<n>` to extract a region. For RSS or other non-HTML output, fetch it through the browser's network
infra/emdash-bot/.flue/skills/repro-public/SKILL.md · 53 lines

How it starts

The opening of the file, as written. The whole thing — 53 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Reproduce: Public Site

The bug is in the rendered public site -- Astro pages outside /_emdash, the SSR output a visitor sees, public routing, sitemap, RSS, image rendering, or query patterns anonymous readers hit. No admin session needed. Reproduce and confirm entirely through agent-browser: the durable artifacts are your screenshots, a captured DOM slice, and a precise, replayable transcript. Do not write Playwright or any other browser test -- you cannot run one reliably here. The regression test belongs to whoever lands the fix.

Environment

The dev server, agent-browser, and any CLI seeding run in an attached container (node + browser; neither exists in the isolate). Read the issue and grep the source in the isolate first, then attach the container for the reproduction.

Do not

  • No git commit, git push, or branch creation.
  • No GitHub writes. Read-only API GETs only.
  • No network beyond localhost (the demo) and the proxy-signed GitHub API.
  • Touch no issue other than the one being investigated.

Procedure

  1. Re-read the issue (isolate). Note the exact URL or route pattern, expected-vs-actual output, and any headers or query strings that mattered. Public-site bugs often hinge on the locale, the requested format (HTML vs RSS), or specific content rows -- be precise.
  2. Pick a demo. demos/simple is the default. For a locale-specific bug, pick a demo with multiple locales seeded; for a collection-specific bug, one that already has that collection.
  3. Seed content only if necessary. If the repro needs a content item the seed lacks, create it with the CLI in the container: pnpm exec emdash content create <collection> --data '...' (see the emdash-cli skill for exact flags). Prefer ephemeral CLI-created content over editing seed files -- it disappears with the Workspace.
  4. Attach a container and start the demo dev server. Astro 7 backgrounds dev servers natively -- from the demo directory run astro dev --background (e.g. pnpm --filter ./demos/simple exec astro dev --background). It detaches, enables JSON logging, and returns once the server is up, so you do not poll or improvise process management. Read the URL/port/PID and readiness from the .astro/dev.json lock file or astro dev status; Astro serves on localhost:4321. Tail output with astro dev logs --follow. If the server never comes up, capture astro dev logs and treat it as a setup failure. Stop it with astro dev stop when done (or leave it -- it dies with the container).
  5. Open the affected route. agent-browser open "http://localhost:4321/<path>" with the exact path from the issue. Include any query string or Accept header the issue calls out.
  6. Inspect the rendered output. agent-browser snapshot -i -c for the accessibility tree; agent-browser get text @e<n> to extract a region. For RSS or other non-HTML output, fetch it through the browser's network panel rather than curl -- the browser follows the demo's Astro routing the way a visitor does.
  7. Check for runtime errors. agent-browser console for hydration warnings, missing data, or 404 sub-requests; agent-browser errors for exceptions thrown during render or hydration.
  8. Screenshot at meaningful states. Save to .bot-artifacts/step-<n>.png: one of the page as loaded, one of the broken element if visible.
  9. Confirm the failure mode matches. Public-site bugs are easy to misidentify -- rendering differences can come from missing seed data, a stale build artifact, or an unrelated route. If you cannot produce exactly the reported symptom, say so. Write the exact replayable steps (URL, any query string or Accept header, observed-vs-expected) so a maintainer can follow without you.

Read the full file on GitHub · 53 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. 5d ago First seen · 53 lines · 48 tokens per session scan A 47f3fc2fc744

Subscribe to this mod's changes

repro-public is a skill published in the GitHub repository emdash-cms/emdash (12,217 stars, last pushed today), licensed MIT. It adds 48 tokens to every session and 1,136 once invoked, about $0.0002 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.

Related

Other skills, from other repositories

agent-browser

Browser automation for testing and verification. Use when you need to interact with web UIs, verify visual changes, fill forms, or capture screenshots.

EngDawood/emdash-claude-plugin · 32 tokens

wordpress-plugin-to-emdash

Port a WordPress plugin to EmDash CMS. Use this skill when asked to migrate, convert, or port a WordPress plugin, theme functionality, or custom post type to EmDash. Provides concept mapping and implementation patterns.

EngDawood/emdash-claude-plugin · 52 tokens

building-emdash-site

Build and customize EmDash CMS sites on Astro. Use when creating pages, defining collections, writing seed files, querying content, rendering Portable Text, setting up menus/taxonomies/widgets, configuring deployment, or any task involving an EmDash-powered Astro site. Assumes basic Astro knowledge but provides all…

EngDawood/emdash-claude-plugin · 70 tokens

emdash-cli

Use the EmDash CLI to manage content, schema, media, and more. Use this skill when you need to interact with a running EmDash instance from the command line — creating content, managing collections, uploading media, generating types, or scripting CMS operations.

EngDawood/emdash-claude-plugin · 56 tokens

emdash-github-actions

Sets up GitHub Actions CI/CD workflows for EmDash plugins — TypeScript type-checking, ESLint linting, Vitest testing, npm publishing, and automated releases. ALWAYS use this skill when a user wants to create, add, set up, or configure GitHub Actions, CI/CD, automated checks, or deployment workflows for an EmDash…

EngDawood/emdash-claude-plugin · 234 tokens

adversarial-reviewer

Adversarial code review that assumes bugs exist and hunts for them. Use when asked to review code, find bugs, audit for correctness, stress-test a PR, or when someone says "tear this apart" or "what's wrong with this". Give no benefit of the doubt — every line is guilty until proven innocent.

EngDawood/emdash-claude-plugin · 71 tokens