A reference for using Datastar HTML attributes and backend actions in Templ templates. Datastar is a browser tool that supports reactive page updates, live server messages, and actions such as loading, creating, changing, or deleting data.

Writing Templ templates with Datastar actions, browser signals, server-sent updates, dynamic page changes, and generated internal links.

It prevents templates from using incorrect or fragile links and action URLs. Instead, the guide requires generated project functions that keep links and actions aligned with the server.

How romshark/datapages configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to romshark/datapages. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/romshark/datapages/main/.claude/skills/datastar/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/romshark/datapages

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/romshark/datapages/datastar/github.svg)](https://agentmods.dev/skills/romshark/datapages/datastar)

Your own site

<a href="https://agentmods.dev/skills/romshark/datapages/datastar"><img src="https://agentmods.dev/badge/skills/romshark/datapages/datastar/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/romshark/datapages/datastar"><img src="https://agentmods.dev/badge/skills/romshark/datapages/datastar.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 21 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 60 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector warn 7 Sept 2026

SkillSpector: 6 findings, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

high Prompt Injection · line 148
Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.

Fix: Audit all comments and invisible characters. Remove any instructions that direct the agent to perform unauthorized actions. Use plain, reviewable content.
high Prompt Injection · line 1030
Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.

Fix: Audit all comments and invisible characters. Remove any instructions that direct the agent to perform unauthorized actions. Use plain, reviewable content.
high Prompt Injection · line 1490
Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.

Fix: Audit all comments and invisible characters. Remove any instructions that direct the agent to perform unauthorized actions. Use plain, reviewable content.
high Prompt Injection · line 1643
Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.

Fix: Audit all comments and invisible characters. Remove any instructions that direct the agent to perform unauthorized actions. Use plain, reviewable content.
low Excessive Agency · line 418
Skill's behavior or capabilities extend beyond its stated purpose. Scope creep allows an agent to perform actions unrelated to its documented functionality, increasing the attack surface.

Fix: Limit the skill's scope to its documented purpose. Remove instructions that enable the agent to perform actions outside its stated functionality.
low Excessive Agency · line 616
Skill's behavior or capabilities extend beyond its stated purpose. Scope creep allows an agent to perform actions unrelated to its documented functionality, increasing the attack surface.

Fix: Limit the skill's scope to its documented purpose. Remove instructions that enable the agent to perform actions outside its stated functionality.

How audits are shown

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.

Model	Per session	Once invoked
Fable 5.1	$0.00021	$0.00060
Opus 5.5	$0.00008	$0.00024
Sonnet 5.5	$0.00004	$0.00012
Haiku 4.5	$0.00002	$0.00006

Measured 1mo ago against content hash b4a136d45d62, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

datastar scanned grade A with 0 findings 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 1mo 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude/skills/datastar/SKILL.md · 8 lines

What it actually says

Read internal/generator/agentdocs/data/skills/datastar/SKILL.md. It is the source shipped to users by datapages init.

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.

1mo ago Changed · -1,749 lines · -33 tokens per session b4a136d45d62
1mo ago Changed a071e21a7bf8
2mo ago Changed · +76 lines 67561348fe22
2mo ago First seen · 1,681 lines · 54 tokens per session scan A 86f4640551e4

Subscribe to this mod's changes

datastar is a skill published in the GitHub repository romshark/datapages (119 stars, last pushed 2d ago), licensed MIT. It adds 21 tokens to every session and 60 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Backend and APIs Frontend Go Writing and docs datastar framework nats templ

datastar next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
datastarromshark/datapages	Skill	119	2d ago	MIT	A	21	Claude Code
structpagesjackielii/structpages	Skill	24	yesterday	BSD-3-Clause	A	154	Claude Code
pinchtabpinchtab/pinchtab	Skill	11k	10d ago	MIT	A	94	Codex
printing-press-amendmvanhorn/cli-printing-press	Skill	4.9k	yesterday	MIT	A	222	Claude Code
golang-graphqlsamber/cc-skills-golang	Skill	3.8k	5d ago	MIT	A	77	Claude Code
golang-grpcsamber/cc-skills-golang	Skill	3.8k	5d ago	MIT	A	72	Claude Code
golang-swaggersamber/cc-skills-golang	Skill	3.8k	5d ago	MIT	A	146	Claude Code

datapages: Skill for Claude Code