launch-gotchas

launch-gotchas is a skill for Claude Code from hamza-ali-shahjahan/hamzaish. It costs 107 tokens per session (3,036 once invoked), scanned A, original, AGPL-3.0.

A reference library of common website-launch failures, their underlying causes, and ways to prevent them.

In plain words
What is it for?
Use it before a launch or while investigating SEO, analytics, or performance problems that appear during release.
Why use it?
It helps diagnose or avoid problems such as missing search indexing, incorrect redirects, canonical errors, inaccurate analytics, or invalid structured data.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the web-launch plugin — 3 skills, 1 command shipped together

Good fit Use it before a launch or while investigating SEO, analytics, or performance problems that appear during release.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/hamza-ali-shahjahan/hamzaish/launch-gotchas
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.

Any agent
npx skills add hamza-ali-shahjahan/hamzaish --skill launch-gotchas
Clone the repo
git clone --depth 1 https://github.com/hamza-ali-shahjahan/hamzaish

Made for: Claude Code.

Or install web-launch, the plugin that ships this one along with the rest of its 3 skills, 1 command.

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 launch-gotchas

README.md
[![agentmods](https://agentmods.dev/badge/skills/hamza-ali-shahjahan/hamzaish/launch-gotchas/github.svg)](https://agentmods.dev/skills/hamza-ali-shahjahan/hamzaish/launch-gotchas)
Your own site
<a href="https://agentmods.dev/skills/hamza-ali-shahjahan/hamzaish/launch-gotchas"><img src="https://agentmods.dev/badge/skills/hamza-ali-shahjahan/hamzaish/launch-gotchas/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 launch-gotchas

Your own site · 80×15
<a href="https://agentmods.dev/skills/hamza-ali-shahjahan/hamzaish/launch-gotchas"><img src="https://agentmods.dev/badge/skills/hamza-ali-shahjahan/hamzaish/launch-gotchas.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 107 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,036 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 unknown 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 $0.00107 $0.03036
Opus 5 $0.00053 $0.01518
Sonnet 5 $0.00021 $0.00607
Haiku 4.5 $0.00011 $0.00304

Measured 8d ago against content hash 9ab9d5dbc3c0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

launch-gotchas 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 8d 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.

**Prevent:** Cross-verify any crawler finding against `curl`-rendered HTML **and** browser DevTools before escalating to engineering. Use a JS-rendered crawl if the tool supports it. Build the cross-check into the audit
factory/plugins/web-launch/skills/launch-gotchas/SKILL.md · 151 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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. 8d ago First seen · 151 lines · 107 tokens per session scan A 9ab9d5dbc3c0

Subscribe to this mod's changes

launch-gotchas is a skill published in the GitHub repository hamza-ali-shahjahan/hamzaish (8 stars, last pushed 5d ago), licensed AGPL-3.0. It adds 107 tokens to every session and 3,036 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 2026-09-03.

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