Holm Web

What it does

When your agent uses it

• Working on web apps built with holm
• Answer questions about holm

Example prompts

• “/holm-web”

Requirements

• Python 3

Workflow steps

8 steps, taken from the first numbered list in SKILL.md.

1. 1Forms without method="POST" submit as GET and hit page(), not handle_submit()
2. 2page.py and actions.py and api.py in the same package have their routes merged into a single APIRouter
3. 3Returning Response objects from pages, actions, or handlers bypasses rendering
4. 4holm auto-wraps page() and layout() list/tuple returns in Fragment. Do not return a list/tuple unless it is a component sequence
5. 5htmy does not flatten nested component sequences: [comp1, comp2] is valid, but [[comp1, comp2]] is not. Use list unpacking or Fragment…
6. 6Strongly prefer ComponentType and ComponentSequence return type annotations over Component to avoid component nesting problems!
7. 7holm uses htmy.page() for both pages and actions automatically. Actions always return HTML; use api.py if you need standard FastAPI behavior
8. 8Path parameters from _id_ or {id} packages are available as standard FastAPI dependencies in pages, layouts, actions, metadata, and APIs

What it can do on your machine

Read from SKILL.md and the folder at commit c90c9b4. 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

  No scripts in the folder and no shell commands in SKILL.md (its code samples are python).

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

• Network

  No URLs in SKILL.md.

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

• Credentials

  Names no API keys, tokens, secrets or passwords.

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

Context cost

Holm Web loads about 1.2k tokens when it runs, and up to ~4.7k if it reads all its reference files. Until then it costs about 57 tokens; SKILL.md has 479 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~57

When it runs · the whole SKILL.md, loaded when a task matches

~1.2k

With references · SKILL.md plus every file in references/, read only if the agent opens them

~4.7k

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

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

The full file from volfpeter/holm at commit c90c9b4, republished under its MIT licence (© volfpeter). 479 words, ~1,169 tokens.

name

holm-web

description

Use when working on web apps built with holm, or to answer questions about holm. Covers file-system routing, layouts, pages, actions, page metadata, form handling, error handling, partial HTML and HTMX considerations.

from holm import App

app = App()

from fastapi import Request


def some_page(request: Request) -> ComponentType:
    url = request.url_for("my_app.users.page")
    return html.a("Users", href=str(url))

© volfpeter, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 10 other files (references) in holm/resources/skills/holm-web of volfpeter/holm.

• SKILL.md
• references/actions.md
• references/apis.md
• references/error-handling.md
• references/forms.md
• references/htmx-integration.md
• references/htmy-context.md
• references/htmy.md
• references/jinja.md
• references/layouts.md
• references/pages.md

Open the folder on GitHubat commit c90c9b4