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Core reactive programming best practices and primitive definitions for preactsignals in Dart.
Install Signals Preact Dart
$ npx skills add rodydavis/signals.dart --skill signals-preact-dart -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install rodydavis/signals.dart signals-preact-dart --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/skills/signals-preact-dart .claude/skills/signals-preact-dart && 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 "signals-preact-dart" agent skill from https://github.com/rodydavis/signals.dart/tree/main/skills/signals-preact-dart into .claude/skills/signals-preact-dart/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "signals-preact-dart", 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/skills/signals-preact-dartType 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 signals-preact-dart -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install rodydavis/signals.dart signals-preact-dart --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/skills/signals-preact-dart .agents/skills/signals-preact-dart && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "signals-preact-dart" agent skill from https://github.com/rodydavis/signals.dart/tree/main/skills/signals-preact-dart into .agents/skills/signals-preact-dart/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "signals-preact-dart", 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 signals-preact-dart -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install rodydavis/signals.dart signals-preact-dart --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/skills/signals-preact-dart .cursor/skills/signals-preact-dart && 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 "signals-preact-dart" agent skill from https://github.com/rodydavis/signals.dart/tree/main/skills/signals-preact-dart into .cursor/skills/signals-preact-dart/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "signals-preact-dart", 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 skills/signals-preact-dart--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 signals-preact-dart -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install rodydavis/signals.dart signals-preact-dart --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/skills/signals-preact-dart .gemini/skills/signals-preact-dart && 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 "signals-preact-dart" agent skill from https://github.com/rodydavis/signals.dart/tree/main/skills/signals-preact-dart into .gemini/skills/signals-preact-dart/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "signals-preact-dart", 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 signals-preact-dartInstalls 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 signals-preact-dart -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/skills/signals-preact-dart .github/skills/signals-preact-dart && 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 "signals-preact-dart" agent skill from https://github.com/rodydavis/signals.dart/tree/main/skills/signals-preact-dart into .github/skills/signals-preact-dart/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "signals-preact-dart", 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 signals-preact-dart -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 signals-preact-dart --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/skills/signals-preact-dart .opencode/skills/signals-preact-dart && 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 "signals-preact-dart" agent skill from https://github.com/rodydavis/signals.dart/tree/main/skills/signals-preact-dart into .opencode/skills/signals-preact-dart/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "signals-preact-dart", 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
signals-preact-dart- GitHub stars
- 819
- Token cost
- ~1.1k tokens
- SKILL.md length
- 358 words
- Files
- 8
- Skills in repo
- 15
- Repo updated
- First seen
- Licence
- Apache-2.0
At a glance
Core reactive programming best practices and primitive definitions for preactsignals in Dart.
- Works in 5 steps: signal(initialValue) → untracked(fn) → computed(fn) → …
- Tasks that involve Cross-platform mobile apps
- SKILL.md covers Related Documentation & Items, Core Primitives Quick Start…, 1. Core Primitives Details and 2. Dependency Tracking &…
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Signals Preact Dart is an agent skill from rodydavis/signals.dart. Core reactive programming best practices and primitive definitions for preactsignals in Dart.
Its SKILL.md is about 1.1k tokens, which your agent loads only when the skill is triggered. The skill folder holds 8 other files (for example `CONTEXT.md`, `core/CONTEXT.md` and `core/batch.md`).
It sits in Mobile, covering Cross-platform mobile apps. It works with Preact and Dart. The repository describes itself as: Reactive programming made simple for Dart and Flutter. The licence is Apache-2.0.
When your agent uses it
- Tasks that involve Cross-platform mobile apps
Example prompts
- “/signals-preact-dart”
Workflow steps
5 steps, taken from the step headings in SKILL.md.
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
Signals Preact Dart loads about 1.1k tokens when it runs. Until then it costs about 29 tokens; SKILL.md has 358 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). 358 words, ~1,061 tokens.
Download SKILL.mdSave it as
.claude/skills/signals-preact-dart/SKILL.md (or your agent's skills folder). This skill also uses 7 other files; get the full folder from GitHub.- name
- signals-preact-dart
- description
- Core reactive programming best practices and primitive definitions for preact_signals in Dart.
Preact Signals in Dart
This skill covers the core reactive programming primitives and implementation patterns of the preact_signals package.
Related Documentation & Items
| Related File | Description |
|---|---|
| signal.md | Standard writeable reactive state primitive containing value accessors, mutation mechanics, and basic custom options. |
| computed.md | Lazy, memoized read-only derived state signal tracking reactive dependencies dynamically. |
| effect.md | Synchronous observer managing active subscription loops, dynamic dependency updates, and lifecycle teardown. |
| readonly.md | Read-only signal views ensuring unidirectional data access flows. |
| batch.md | Transactional state mutation blocks optimizing reactive computations and preventing rendering/recompute churn. |
Core Primitives Quick Start Guide
The signals library exposes five core functions which are the building blocks to model any reactive business logic.
1. signal(initialValue)
Creates a new mutable signal container. You read a signal's value or subscribe to updates by accessing .value.
final counter = signal(0);
print(counter.value); // 0
counter.value = 1; // Mutates value and schedules dependent updates.peek()
Reads a signal's current value without subscribing to its mutations.
final counter = signal(0);
final logCount = signal(0);
effect(() {
print(counter.value);
// Read using peek to avoid subscribing/triggering loop
logCount.value = logCount.peek() + 1;
});2. untracked(fn)
Executes a callback that reads signals without subscribing to any of them.
final counter = signal(0);
final count = signal(0);
effect(() {
print(counter.value);
count.value = untracked(() => count.value + 1);
});3. computed(fn)
Combines the values of multiple signals into a lazy, memoized derived signal.
final first = signal('John');
final last = signal('Doe');
final fullName = computed(() => '${first.value} ${last.value}');
print(fullName.value); // John Doe4. effect(fn)
Orchestrates immediate synchronous side effects by running a callback and subscribing to any signals read within it.
final name = signal('Jane');
final dispose = effect(() => print('Hello $name'));
dispose(); // Clean up subscription5. batch(fn)
Groups multiple signal writes into a single transaction, executing all dependent computed evaluations and effects exactly once at the end.
final a = signal(0);
final b = signal(0);
batch(() {
a.value = 1;
b.value = 2;
});1. Core Primitives Details
Show full SKILL.md (146 more words)Show less
A. Signal<T>
A state primitive representing a mutable value that can be observed.
final count = signal(0);
count.value = 1; // Notifies all active subscribers/effectsB. Computed<T>
A derived state primitive representing a read-only value calculated based on other signals. It is:
- Lazy: Evaluated only when accessed.
- Memoized: Caches its value and only recompute when its source dependencies change.
final count = signal(2);
final double = computed(() => count.value * 2);C. Effect
An observer that executes a callback immediately and tracks read signals. It re-runs whenever any of the tracked signals change.
final dispose = effect(() {
print('Current count: ${count.value}');
});
dispose(); // Clean up subscription2. Dependency Tracking & Re-entrancy Rules
- Synchronous Context: Dependencies are tracked dynamically based on which signals are read during the execution of the callback.
- Cycle Detection: Reading a computed signal inside its own execution flow or setting dependencies inside computed callbacks causes cycles. Avoid side-effects inside computed getters.
- Lazy Initial Value: Lazy computed signals are not evaluated when created. Always call
isInitializedor check the initialization status before forcing a.peek()inside observers to avoid re-entrancy cycle crashes.
© 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
SKILL.md and 7 other files in skills/signals-preact-dart of rodydavis/signals.dart.
- SKILL.md
- CONTEXT.md
- core/CONTEXT.md
- core/batch.md
- core/computed.md
- core/effect.md
- core/readonly.md
- core/signal.md
Open the folder on GitHubat commit 81d64e8
Compare with similar skills
Signals Preact Dart 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 |
|---|---|---|---|---|---|---|
| Signals Preact Dart this skillrodydavis/signals.dart | 819 | — | ~1.1k | Automated safety check: Pass | Apache-2.0 | |
| Engine Whats Newflutter/flutter | 180k | — | ~978 | Automated safety check: Pass | BSD-3-Clause | |
| Flutter Cherry Pickflutter/flutter | 180k | — | ~1.8k | Automated safety check: Pass | BSD-3-Clause | |
| Upgrade Browserflutter/flutter | 180k | — | ~1.1k | Automated safety check: Pass | BSD-3-Clause | |
| Bump Dartflutter/flutter | 180k | — | ~1.2k | Automated safety check: Pass | BSD-3-Clause | |
| Run Devicelab With Ledflutter/flutter | 180k | — | ~852 | Automated safety check: Pass | BSD-3-Clause |
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Related
Categories
Questions about Signals Preact Dart
What does Signals Preact Dart do?
Core reactive programming best practices and primitive definitions for preactsignals in Dart. dart. Core reactive programming best practices and primitive definitions for preactsignals in Dart.
When should I use Signals Preact Dart?
Signals Preact Dart fits situations like: tasks that involve Cross-platform mobile apps.
How do I install Signals Preact Dart in Claude Code?
Run `npx skills add rodydavis/signals.dart --skill signals-preact-dart -a claude-code`. Or copy the skill folder (skills/signals-preact-dart in rodydavis/signals.dart) into .claude/skills/signals-preact-dart in your project. Claude Code loads it when a task matches its description.
How do I install Signals Preact Dart in Codex?
Run `npx skills add rodydavis/signals.dart --skill signals-preact-dart -a codex`. Or copy the skill folder (skills/signals-preact-dart in rodydavis/signals.dart) into .agents/skills/signals-preact-dart in your project. Codex loads it when a task matches its description.
Can I use Signals Preact Dart 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 signals-preact-dart -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/signals-preact-dart, .gemini/skills/signals-preact-dart, .github/skills/signals-preact-dart and .opencode/skills/signals-preact-dart in your project.
What does Signals Preact Dart need to run?
SKILL.md names no scripts, command-line tools or credentials: Signals Preact Dart is instructions for the agent only.
Does Signals Preact Dart 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 Signals Preact Dart 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 Signals Preact Dart use?
Signals Preact Dart 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 Signals Preact Dart use?
About 1.1k tokens (SKILL.md is roughly 4.2k 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 Signals Preact Dart?
Skills that share tags, products or a category with Signals Preact Dart: Engine Whats New (flutter/flutter, 180k stars), Flutter Cherry Pick (flutter/flutter, 180k stars), Upgrade Browser (flutter/flutter, 180k stars) and Bump Dart (flutter/flutter, 180k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Signals Preact Dart?
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.