Agent skill

Web Data Patterns

by Siege-Perilous in Siege-Perilous/tableslayer

Data-layer patterns for apps/web — apiFactory error semantics, mutationFactory/handleMutation, drizzle schema conventions, the Y.js/PartyKit realtime model (no save pipeline!), auth, R2 uploads…

Custom licenceAuto-check: notesDatabases

Install Web Data Patterns

skills CLI
$ npx skills add Siege-Perilous/tableslayer --skill web-data-patterns -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install Siege-Perilous/tableslayer web-data-patterns --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/Siege-Perilous/tableslayer.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/web-data-patterns .claude/skills/web-data-patterns && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
web-data-patterns
GitHub stars
122
Token cost
~3k tokens
SKILL.md length
1,204 words
Files
1
Skills in repo
3
Repo updated
First seen
Licence
Custom licence

At a glance

Data-layer patterns for apps/web — apiFactory error semantics, mutationFactory/handleMutation, drizzle schema conventions, the Y.js/PartyKit realtime model (no save pipeline!), auth, R2 uploads…

  • Tasks that involve ORMs and data access
  • SKILL.md covers apiFactory (every /routes/api…, Frontend queries/mutations…, Database (drizzle +… and Realtime (the biggest thing to…, plus 4 more sections
  • Calls pnpm; needs CLOUDFLARE_WORKERS_KEY and INTERNAL_API_TOKEN
  • Tasks that involve REST APIs

What it does

Web Data Patterns is an agent skill from Siege-Perilous/tableslayer. Data-layer patterns for apps/web — apiFactory error semantics, mutationFactory/handleMutation, drizzle schema conventions, the Y.js/PartyKit realtime model (no save pipeline!), auth, R2 uploads, Stripe, email, env vars. Load when adding/changing API endpoints, queries/mutations, schema, realtime behavior, or server logic in apps/web.

Its SKILL.md is about 3k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Databases, covering ORMs and data access and REST APIs. It works with Stripe. The repository describes itself as: Tools to create animated battle maps for in person RPG games.

When your agent uses it

  • Tasks that involve ORMs and data access
  • Tasks that involve REST APIs

Example prompts

  • “/web-data-patterns”

Requirements

  • A credential in INTERNAL_API_TOKEN
  • A credential in CLOUDFLARE_WORKERS_KEY

What it can do on your machine

Read from SKILL.md and the folder at commit 63c5694. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • pnpm

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md. Its commands use pnpm, which can reach the network depending on how they are called.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names these keys or tokens, usually read from environment variables:

    • CLOUDFLARE_WORKERS_KEY
    • INTERNAL_API_TOKEN
    • TURNSTILE_SITE_KEY
    • TURNSTILE_SECRET_KEY

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Web Data Patterns loads about 3k tokens when it runs. Until then it costs about 88 tokens; SKILL.md has 1,204 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~88
When it runs · the whole SKILL.md, loaded when a task matches
~3k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

  • NoteMentions a .env fileSKILL.md:82
    nd only feed the admin usage gauge. See `.env-example` for the full list.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 1,204 words (~2,954 tokens).

“Defined in apps/web/src/lib/factories/apiFactory.ts. apiFactory(handler, { validationSchema, …messages }) — zod-validates the JSON body, hands the handler event & { body }, JSON-serializes the return.”

— opening of SKILL.md by Siege-Perilous, Custom licence
name
web-data-patterns

Read the full SKILL.md on GitHub

Files

Just SKILL.md in .claude/skills/web-data-patterns of Siege-Perilous/tableslayer.

Open the folder on GitHubat commit 63c5694

Compare with similar skills

Web Data Patterns next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Web Data Patterns compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Web Data Patterns this skillSiege-Perilous/tableslayer122—~3kAutomated safety check: NotesCustom licence
Neon Postgresaiskillstore/marketplace4304 repos~4.2kAutomated safety check: NotesApache-2.0
ImplementAI-Unified-Process/marketplace140—~4.7kAutomated safety check: WarnApache-2.0
Backend Dev Guidelineslangfuse/langfuse35k—~1.9kAutomated safety check: PassCustom licence
Fastcrudbenavlabs/fastcrud1.6k—~5kAutomated safety check: PassMIT
Maui Sqlite Databasedavidortinau/maui-skills174—~1.2kAutomated safety check: PassMIT

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Works with

Questions about Web Data Patterns

What does Web Data Patterns do?

Data-layer patterns for apps/web — apiFactory error semantics, mutationFactory/handleMutation, drizzle schema conventions, the Y.js/PartyKit realtime model (no save pipeline!), auth, R2 uploads…. Web Data Patterns is an agent skill from Siege-Perilous/tableslayer.), auth, R2 uploads, Stripe, email, env vars.

When should I use Web Data Patterns?

Web Data Patterns fits situations like: tasks that involve ORMs and data access; tasks that involve REST APIs.

How do I install Web Data Patterns in Claude Code?

Run `npx skills add Siege-Perilous/tableslayer --skill web-data-patterns -a claude-code`. Or copy the skill folder (.claude/skills/web-data-patterns in Siege-Perilous/tableslayer) into .claude/skills/web-data-patterns in your project. Claude Code loads it when a task matches its description.

How do I install Web Data Patterns in Codex?

Run `npx skills add Siege-Perilous/tableslayer --skill web-data-patterns -a codex`. Or copy the skill folder (.claude/skills/web-data-patterns in Siege-Perilous/tableslayer) into .agents/skills/web-data-patterns in your project. Codex loads it when a task matches its description.

Can I use Web Data Patterns in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add Siege-Perilous/tableslayer --skill web-data-patterns -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/web-data-patterns, .gemini/skills/web-data-patterns, .github/skills/web-data-patterns and .opencode/skills/web-data-patterns in your project.

What does Web Data Patterns need to run?

Going by SKILL.md and its folder, Web Data Patterns needs the command-line tools its instructions call (pnpm) and credentials named CLOUDFLARE_WORKERS_KEY, INTERNAL_API_TOKEN, TURNSTILE_SITE_KEY and TURNSTILE_SECRET_KEY. Our summary lists: A credential in INTERNAL_API_TOKEN; A credential in CLOUDFLARE_WORKERS_KEY.

Does Web Data Patterns access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Web Data Patterns safe to install?

Our automated static check of SKILL.md found notes only (mentions a .env file), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does Web Data Patterns use?

Web Data Patterns has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Web Data Patterns use?

About 3k tokens (SKILL.md is roughly 12k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Web Data Patterns?

Skills that share tags, products or a category with Web Data Patterns: Neon Postgres (aiskillstore/marketplace, 430 stars), Implement (AI-Unified-Process/marketplace, 140 stars), Backend Dev Guidelines (langfuse/langfuse, 35k stars) and Fastcrud (benavlabs/fastcrud, 1.6k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Web Data Patterns?

Siege-Perilous (a GitHub organization) maintains it in Siege-Perilous/tableslayer, which has 122 GitHub stars. The repository holds 3 skills in this directory. The repository was last updated on October 6, 2026.

Source: Siege-Perilous/tableslayer on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.