React Router Development
remix-run/react-router
Guides work on React Router apps by first identifying whether the app uses Framework, Data or Declarative mode, then loading the matching reference and the installed package docs.
Sets the rules for static or server mode Jaspr apps in Dart, covering dual entrypoints, the client annotation and data hydration.
Install Jaspr Pre-Rendering and Hydration
$ npx skills add rodydavis/signals.dart --skill jaspr-pre-rendering-and-hydration -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install rodydavis/signals.dart jaspr-pre-rendering-and-hydration --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/rodydavis/signals.dart.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/jaspr-pre-rendering-and-hydration .claude/skills/jaspr-pre-rendering-and-hydration && rm -rf skills-srcUse ~/.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/
Install the "jaspr-pre-rendering-and-hydration" agent skill from https://github.com/rodydavis/signals.dart/tree/main/.agents/skills/jaspr-pre-rendering-and-hydration into .claude/skills/jaspr-pre-rendering-and-hydration/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "jaspr-pre-rendering-and-hydration", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/rodydavis/signals.dart/tree/main/.agents/skills/jaspr-pre-rendering-and-hydrationType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add rodydavis/signals.dart --skill jaspr-pre-rendering-and-hydration -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install rodydavis/signals.dart jaspr-pre-rendering-and-hydration --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/rodydavis/signals.dart.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/jaspr-pre-rendering-and-hydration .agents/skills/jaspr-pre-rendering-and-hydration && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "jaspr-pre-rendering-and-hydration" agent skill from https://github.com/rodydavis/signals.dart/tree/main/.agents/skills/jaspr-pre-rendering-and-hydration into .agents/skills/jaspr-pre-rendering-and-hydration/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "jaspr-pre-rendering-and-hydration", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add rodydavis/signals.dart --skill jaspr-pre-rendering-and-hydration -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install rodydavis/signals.dart jaspr-pre-rendering-and-hydration --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/rodydavis/signals.dart.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/jaspr-pre-rendering-and-hydration .cursor/skills/jaspr-pre-rendering-and-hydration && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "jaspr-pre-rendering-and-hydration" agent skill from https://github.com/rodydavis/signals.dart/tree/main/.agents/skills/jaspr-pre-rendering-and-hydration into .cursor/skills/jaspr-pre-rendering-and-hydration/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "jaspr-pre-rendering-and-hydration", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/rodydavis/signals.dart.git --path .agents/skills/jaspr-pre-rendering-and-hydration--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add rodydavis/signals.dart --skill jaspr-pre-rendering-and-hydration -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install rodydavis/signals.dart jaspr-pre-rendering-and-hydration --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/rodydavis/signals.dart.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/jaspr-pre-rendering-and-hydration .gemini/skills/jaspr-pre-rendering-and-hydration && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "jaspr-pre-rendering-and-hydration" agent skill from https://github.com/rodydavis/signals.dart/tree/main/.agents/skills/jaspr-pre-rendering-and-hydration into .gemini/skills/jaspr-pre-rendering-and-hydration/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "jaspr-pre-rendering-and-hydration", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install rodydavis/signals.dart jaspr-pre-rendering-and-hydrationInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add rodydavis/signals.dart --skill jaspr-pre-rendering-and-hydration -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/rodydavis/signals.dart.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/jaspr-pre-rendering-and-hydration .github/skills/jaspr-pre-rendering-and-hydration && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "jaspr-pre-rendering-and-hydration" agent skill from https://github.com/rodydavis/signals.dart/tree/main/.agents/skills/jaspr-pre-rendering-and-hydration into .github/skills/jaspr-pre-rendering-and-hydration/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "jaspr-pre-rendering-and-hydration", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add rodydavis/signals.dart --skill jaspr-pre-rendering-and-hydration -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install rodydavis/signals.dart jaspr-pre-rendering-and-hydration --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/rodydavis/signals.dart.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/jaspr-pre-rendering-and-hydration .opencode/skills/jaspr-pre-rendering-and-hydration && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "jaspr-pre-rendering-and-hydration" agent skill from https://github.com/rodydavis/signals.dart/tree/main/.agents/skills/jaspr-pre-rendering-and-hydration into .opencode/skills/jaspr-pre-rendering-and-hydration/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "jaspr-pre-rendering-and-hydration", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
jaspr-pre-rendering-and-hydration- GitHub stars
- 819
- Token cost
- ~1.2k tokens
- SKILL.md length
- 418 words
- Files
- 1
- Skills in repo
- 15
- Repo updated
- First seen
- Licence
- Apache-2.0
At a glance
Sets the rules for static or server mode Jaspr apps in Dart, covering dual entrypoints, the client annotation and data hydration.
- Works in 3 steps: Dual Entrypoints → Library Constraints → Interactivity / Hydration: Components…
- Building a static or server mode Jaspr project
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Adding client-side interactivity to a server-rendered component
What it does
It applies when a project's pubspec sets a Jaspr mode of static or server, where components pre-render on the server by default and only gain interactivity through hydration in the browser. The server entrypoint must never import the browser-only JS interop or web packages, and the client entrypoint must never import file or FFI packages; shared code using the universal web package has to guard any browser API access behind a web-platform check so it doesn't crash during server rendering.
Adding interactivity means annotating only the uppermost component of a subtree with the client annotation, since child components in that subtree hydrate automatically as part of the parent; the client entrypoint's app call finds and hydrates every annotated component that was pre-rendered. Parameters passed into a client component are serialized on the server and deserialized in the browser, so they must be initializing fields and either a primitive type or a custom type with defined encoder and decoder methods, never a function or a component.
When your agent uses it
- Building a static or server mode Jaspr project
- Adding client-side interactivity to a server-rendered component
- Passing server-fetched data into a hydrated client component
Example prompts
- “Add a client counter component that hydrates on this server-rendered page.”
- “Why is my client entrypoint failing to import a file-system package?”
- “Pass this list of products from the server into a hydrated client widget.”
Requirements
- A Jaspr project in static or server mode
Workflow steps
3 steps, taken from the first numbered list in SKILL.md.
- Dual Entrypoints
- Library Constraints
- Interactivity / Hydration: Components are server-rendered by default. To add client interactivity (e.g., event listeners, state, using…
What it can do on your machine
Read from SKILL.md and the folder at commit 81d64e8. 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 dart).
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
Jaspr Pre-Rendering and Hydration loads about 1.2k tokens when it runs. Until then it costs about 59 tokens; SKILL.md has 418 words of instructions outside code blocks.
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 passed
The automated check found no risky patterns in SKILL.md.
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 rodydavis/signals.dart at commit 81d64e8, republished under its Apache-2.0 licence (© rodydavis). 418 words, ~1,187 tokens.
Download SKILL.mdSave it as
.claude/skills/jaspr-pre-rendering-and-hydration/SKILL.md (or your agent's skills folder).- name
- jaspr-pre-rendering-and-hydration
- description
- Use when working in a **static** or **server** mode Jaspr project. Covers SSR/SSG, async data fetching, the @client annotation, hydration, and handling dual entrypoints (.server.dart vs .client.dart).
- metadata.jaspr_version
- 0.23.1
This skill is relevant for static and server mode Jaspr projects. You can check the mode of a Jaspr project in pubspec.yaml under jaspr: mode: <mode>.
Core Rules for Pre-rendering (SSR/SSG)
Jaspr pre-renders components at request/build-time on the server. Interactive browser features require hydration.
- Dual Entrypoints:
- Server:
lib/main.server.dart-> CallsrunApp(Document(body: MyApp())) - Client:
lib/main.client.dart-> CallsrunApp(ClientApp())
- Server:
- Library Constraints:
- Importing: You MUST NOT import
dart:js_interoporpackage:webin any code imported by the server entrypoint. - Importing: You MUST NOT import
dart:ioordart:ffiin any code imported by the client entrypoint. - Using: You can import
package:universal_webin shared code, but you MUST wrap any access to its browser APIs inside anif (kIsWeb)check to prevent crashing during server-side rendering.
- Importing: You MUST NOT import
- Interactivity / Hydration: Components are server-rendered by default. To add client interactivity (e.g., event listeners, state, using browser APIs), you MUST annotate a component with
@client.
The @client Annotation and ClientApp
When you annotate a component with @client, Jaspr renders its initial HTML on the server and "hydrates" it in the browser.
ClientApp()(called in the client entrypoint) automatically looks for and hydrates all@clientcomponents that were pre-rendered on the server.- Rule: Only the uppermost component of a subtree that needs client interactivity needs to be annotated with
@client. Do not annotate child components in that subtree, they will automatically be hydrated as part of the parent.
Show full SKILL.md (190 more words)Show less
Passing Data to @client Components
Use parameters of @client components to pass data from the server to the client. These are automatically serialized on the server and deserialized in the browser.
- Rule 1: All parameters MUST be initializing fields (e.g.,
const MyClientComponent({required this.title});). - Rule 2: All parameters MUST be serializable. They must be primitive types (
int,String,double,bool,List,Map) OR custom types that define@encoderand@decodermethods.- Parameters MUST NOT be functions, components, or any other non-serializable types.
Fetching Data on the Server (Async Components)
When pre-rendering in server or static mode, you often need to fetch data asynchronously (e.g., from a database or API) before rendering the HTML. Jaspr provides special server-only components to delay the build phase until the data is ready.
- Rule 1: You MUST use
AsyncStatelessComponentorAsyncBuilderto perform async work during the build phase. - Rule 2: These components MUST ONLY be used on the server (import
package:jaspr/server.dart). - Rule 3: Once the data is fetched on the server, you should pass it to a
@clientcomponent as a parameter if you need that data to be available for client-side interactivity.
Example Usage:
import 'package:jaspr/server.dart'; // Note the server-only import!
import 'package:jaspr/dom.dart';
import 'my_interactive_button.dart';
// This component fetches data before server-rendering the HTML.
class MyServerComponent extends AsyncStatelessComponent {
const MyServerComponent();
@override
Future<Component> build(BuildContext context) async {
// 1. Fetch data asynchronously on the server
final databaseCount = await loadCountFromDatabase();
return div([
.text('This is static.'),
// 2. Pass the fetched data to the client component
MyInteractiveButton(initialCount: databaseCount),
]);
}
}import 'package:jaspr/jaspr.dart';
import 'package:jaspr/dom.dart';
// This component runs in the browser (interactive).
@client
class MyInteractiveButton extends StatefulComponent {
const MyInteractiveButton({this.initialCount = 0});
final int initialCount;
@override
State<MyInteractiveButton> createState() => _MyInteractiveButtonState();
}
class _MyInteractiveButtonState extends State<MyInteractiveButton> {
late int count = component.initialCount;
@override
Component build(BuildContext context) {
return button(
onClick: () => setState(() => count++),
[.text('Clicked $count times')],
);
}
}© rodydavis, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in .agents/skills/jaspr-pre-rendering-and-hydration of rodydavis/signals.dart.
Open the folder on GitHubat commit 81d64e8
Compare with similar skills
Jaspr Pre-Rendering and Hydration 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Jaspr Pre-Rendering and Hydration this skillrodydavis/signals.dart | 819 | — | ~1.2k | Automated safety check: Pass | Apache-2.0 | |
| React Router Developmentremix-run/react-router | 57k | 1 repos | ~1.5k | Automated safety check: Pass | MIT | |
| React UI State PatternsChrisWiles/claude-code-showcase | 6.1k | 8 repos | ~1.6k | Automated safety check: Pass | None | |
| GSAP in Vue, Nuxt and Sveltegreensock/gsap-skills | 16k | 3 repos | ~2.6k | Automated safety check: Pass | MIT | |
| Svelte Core Best Practicesrilldata/rill | 2.9k | 4 repos | ~1.8k | Automated safety check: Pass | Apache-2.0 | |
| Vuetify Playgroundvuetifyjs/vuetify | 41k | — | ~730 | Automated safety check: Pass | Custom licence |
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Related
Works with
Categories
Questions about Jaspr Pre-Rendering and Hydration
What does Jaspr Pre-Rendering and Hydration do?
Sets the rules for static or server mode Jaspr apps in Dart, covering dual entrypoints, the client annotation and data hydration. It applies when a project's pubspec sets a Jaspr mode of static or server, where components pre-render on the server by default and only gain interactivity through hydration in the browser. The server entrypoint must never import the browser-only JS interop or web packages, and the client entrypoint must never import file or FFI packages; shared code using the universal web package has to guard any browser API access behind a web-platform check so it doesn't crash during server rendering.
When should I use Jaspr Pre-Rendering and Hydration?
Jaspr Pre-Rendering and Hydration fits situations like: building a static or server mode Jaspr project; adding client-side interactivity to a server-rendered component; passing server-fetched data into a hydrated client component.
How do I install Jaspr Pre-Rendering and Hydration in Claude Code?
Run `npx skills add rodydavis/signals.dart --skill jaspr-pre-rendering-and-hydration -a claude-code`. Or copy the skill folder (.agents/skills/jaspr-pre-rendering-and-hydration in rodydavis/signals.dart) into .claude/skills/jaspr-pre-rendering-and-hydration in your project. Claude Code loads it when a task matches its description.
How do I install Jaspr Pre-Rendering and Hydration in Codex?
Run `npx skills add rodydavis/signals.dart --skill jaspr-pre-rendering-and-hydration -a codex`. Or copy the skill folder (.agents/skills/jaspr-pre-rendering-and-hydration in rodydavis/signals.dart) into .agents/skills/jaspr-pre-rendering-and-hydration in your project. Codex loads it when a task matches its description.
Can I use Jaspr Pre-Rendering and Hydration 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 rodydavis/signals.dart --skill jaspr-pre-rendering-and-hydration -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/jaspr-pre-rendering-and-hydration, .gemini/skills/jaspr-pre-rendering-and-hydration, .github/skills/jaspr-pre-rendering-and-hydration and .opencode/skills/jaspr-pre-rendering-and-hydration in your project.
What does Jaspr Pre-Rendering and Hydration need to run?
SKILL.md names no scripts, command-line tools or credentials: Jaspr Pre-Rendering and Hydration is instructions for the agent only. Our summary lists: A Jaspr project in static or server mode.
Does Jaspr Pre-Rendering and Hydration 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 Jaspr Pre-Rendering and Hydration safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Jaspr Pre-Rendering and Hydration use?
Jaspr Pre-Rendering and Hydration is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Jaspr Pre-Rendering and Hydration use?
About 1.2k tokens (SKILL.md is roughly 4.7k 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 Jaspr Pre-Rendering and Hydration?
Skills that share tags, products or a category with Jaspr Pre-Rendering and Hydration: React Router Development (remix-run/react-router, 57k stars), React UI State Patterns (ChrisWiles/claude-code-showcase, 6.1k stars), GSAP in Vue, Nuxt and Svelte (greensock/gsap-skills, 16k stars) and Svelte Core Best Practices (rilldata/rill, 2.9k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Jaspr Pre-Rendering and Hydration?
rodydavis (a GitHub user) maintains it in rodydavis/signals.dart, which has 819 GitHub stars. The repository holds 15 skills in this directory. The repository was last updated on September 14, 2026.
Source: rodydavis/signals.dart on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.