Agent skill

Dart Long Lines

Guidelines for handling long lines in Dart code to adhere to the 80-column rule.

Apache-2.0Auto-check passedDevelopment

Install Dart Long Lines

skills CLI

$ npx skills add kevmoo/dash_skills --skill dart-long-lines -a claude-code

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

GitHub CLI

$ gh skill install kevmoo/dash_skills dart-long-lines --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/kevmoo/dash_skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/dart-long-lines .claude/skills/dart-long-lines && 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/

Paste into Claude Code

Install the "dart-long-lines" agent skill from https://github.com/kevmoo/dash_skills/tree/main/skills/dart-long-lines into .claude/skills/dart-long-lines/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dart-long-lines", 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

$skill-installer install https://github.com/kevmoo/dash_skills/tree/main/skills/dart-long-lines

Type 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.

skills CLI

$ npx skills add kevmoo/dash_skills --skill dart-long-lines -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install kevmoo/dash_skills dart-long-lines --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/kevmoo/dash_skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/dart-long-lines .agents/skills/dart-long-lines && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "dart-long-lines" agent skill from https://github.com/kevmoo/dash_skills/tree/main/skills/dart-long-lines into .agents/skills/dart-long-lines/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dart-long-lines", 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.

skills CLI

$ npx skills add kevmoo/dash_skills --skill dart-long-lines -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install kevmoo/dash_skills dart-long-lines --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/kevmoo/dash_skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/dart-long-lines .cursor/skills/dart-long-lines && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "dart-long-lines" agent skill from https://github.com/kevmoo/dash_skills/tree/main/skills/dart-long-lines into .cursor/skills/dart-long-lines/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dart-long-lines", 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

$ gemini skills install https://github.com/kevmoo/dash_skills.git --path skills/dart-long-lines

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add kevmoo/dash_skills --skill dart-long-lines -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install kevmoo/dash_skills dart-long-lines --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/kevmoo/dash_skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/dart-long-lines .gemini/skills/dart-long-lines && rm -rf skills-src

Use ~/.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/

Paste into Gemini CLI

Install the "dart-long-lines" agent skill from https://github.com/kevmoo/dash_skills/tree/main/skills/dart-long-lines into .gemini/skills/dart-long-lines/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dart-long-lines", 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.

GitHub CLI

$ gh skill install kevmoo/dash_skills dart-long-lines

Installs 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).

skills CLI

$ npx skills add kevmoo/dash_skills --skill dart-long-lines -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/kevmoo/dash_skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/dart-long-lines .github/skills/dart-long-lines && rm -rf skills-src

Use ~/.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/

Paste into GitHub Copilot

Install the "dart-long-lines" agent skill from https://github.com/kevmoo/dash_skills/tree/main/skills/dart-long-lines into .github/skills/dart-long-lines/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dart-long-lines", 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.

skills CLI

$ npx skills add kevmoo/dash_skills --skill dart-long-lines -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install kevmoo/dash_skills dart-long-lines --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/kevmoo/dash_skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/dart-long-lines .opencode/skills/dart-long-lines && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "dart-long-lines" agent skill from https://github.com/kevmoo/dash_skills/tree/main/skills/dart-long-lines into .opencode/skills/dart-long-lines/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dart-long-lines", 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: dart-long-lines
GitHub stars: 147
Token cost: ~1k tokens
SKILL.md length: 419 words
Files: 2
Skills in repo: 12
Repo updated: Oct 8, 2026
First seen: Oct 7, 2026
Licence: Apache-2.0

At a glance

Guidelines for handling long lines in Dart code to adhere to the 80-column rule.

Works in 3 steps: When to use this skill → Guidelines → Examples
Tasks that involve Cross-platform mobile apps
SKILL.md covers 1. When to use this skill, Discovery, 2. Guidelines and 3. Examples
Calls dart

What it does

Dart Long Lines is an agent skill from kevmoo/dash_skills. Guidelines for handling long lines in Dart code to adhere to the 80-column rule. The lineslongerthan80chars lint.

Its SKILL.md is about 1k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `evals/evals.json`).

It sits in Development, covering Cross-platform mobile apps and Linting and formatting. It works with Dart. The repository describes itself as: Agent Skills for Dart and Flutter ecosytem. The licence is Apache-2.0.

When your agent uses it

Tasks that involve Cross-platform mobile apps
Tasks that involve Linting and formatting

Example prompts

“Use the dart-long-lines skill to guideline for handling long lines in Dart code to adhere to the 80-column rule”
“/dart-long-lines”

Workflow steps

3 steps, taken from the step headings in SKILL.md.

When to use this skill
Guidelines
Examples

What it can do on your machine

Read from SKILL.md and the folder at commit 397a703. 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:
- dart
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
- dart.dev
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

Dart Long Lines loads about 1k tokens when it runs. Until then it costs about 34 tokens; SKILL.md has 419 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~34
When it runs · the whole SKILL.md, loaded when a task matches: ~1k

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 kevmoo/dash_skills at commit 397a703, republished under its Apache-2.0 licence (© kevmoo). 419 words, ~1,047 tokens.

Download SKILL.mdSave it as .claude/skills/dart-long-lines/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.

name: dart-long-lines
description: Guidelines for handling long lines in Dart code to adhere to the 80-column rule. The `lines_longer_than_80_chars` lint.
license: Apache-2.0
key_features: 80-column rule compliance, Line length refactoring, Linter rule enforcement

Dart Long Lines

1. When to use this skill

Use this skill when:

Writing Dart code that might exceed the 80-column limit.
Refactoring code to comply with the lines_longer_than_80_chars lint. Reference: https://dart.dev/tools/linter-rules/lines_longer_than_80_chars

When NOT to use (Abstention Guardrails)

Do NOT break lines or alter code when:

Unbreakable URLs & URIs: Lines contain long HTTP/HTTPS URLs, import URIs, or file paths where breaking them across lines would invalidate the link.
Complex Regular Expression Literals: Long RegExp patterns (RegExp(r'...')) where inserting whitespace or line breaks changes the matching semantics.
ASCII Art, Tables, or Preformatted Diagrams: Preformatted text blocks, table rows, or ASCII diagrams inside comments or strings where wrapping lines destroys visual alignment.
Prior to Automated Formatting: Do NOT manually break code lines before running dart format. Let dart format handle code wrapping automatically; only manually wrap comments, docs, and multi-line strings that the formatter does not re-wrap.

Discovery

To find lines that exceed the limit:

Automated Analysis

The most reliable way to find long lines is to use the Dart analyzer:

Command: dart analyze
Lint: lines_longer_than_80_chars

Manual Search

To search for long lines using regex:

Regex: ^.{81,}$ (Matches any line with 81 or more characters).

2. Guidelines

Format First

Always run dart format before manually breaking long lines. The formatter often automatically fixes long lines, especially in generated code, and applies standard Dart styling rules.

Code Comments

Break long code comments (//) cleanly at word boundaries to ensure lines do not exceed 80 characters. Maintain tight formatting and avoid unnecessary vertical space.

Show full SKILL.md (170 more words)Show less

Documentation Comments (`///`)

Apply the same line-breaking rules as for code comments.
Avoid breaking markdown link blocks like [name] or [text](http://example.com) across lines. Place them on their own line if they exceed the limit.
Start doc comments with a single summary sentence, followed by a blank line before the rest of the comment. It is okay to break this first sentence across multiple lines to fit the 80-column limit.
Avoid unresolved references or dangling sentences.

Long Strings

Use adjacent string literals (e.g., 'part 1 ' 'part 2') to break long strings. Break at word boundaries.
If a single-line string contains newline characters (\n) or if there are consecutive print statements, consider migrating to a multi-line string literal (''').

Format and Analyze After Changes

Run dart format and dart analyze after making changes.
Be aware that splitting strings may trigger new lints (e.g., prefer_single_quotes if a double-quoted string is split into parts that no longer contain single quotes).

3. Examples

Documentation Comment Link

Avoid:

dart

/// This is a long doc comment that contains a link to [a very long
/// URL](http://example.com/very/long/url/that/exceeds/eighty/chars).

Prefer:

dart

/// This is a long doc comment that contains a link to [a very long URL][ref].
///
/// [ref]: http://example.com/very/long/url/that/exceeds/eighty/chars

Adjacent String Literals

Prefer:

dart

final longString = 'This is a very long string that needs to be broken '
    'across multiple lines to stay under the limit.';

Multi-line String Migration

Avoid:

dart

print('This is line 1\nThis is line 2 that is also quite long\nThis is line 3 which makes the whole thing exceed eighty characters');

Prefer:

dart

print('''This is line 1
This is line 2 that is also quite long
This is line 3 which makes the whole thing exceed eighty characters''');

Files

SKILL.md and 1 other file in skills/dart-long-lines of kevmoo/dash_skills.

SKILL.md
evals/evals.json

Open the folder on GitHubat commit 397a703

Compare with similar skills

Dart Long Lines 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.

Dart Long Lines compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Dart Long Lines this skillkevmoo/dash_skills	147	—	~1k	Automated safety check: Pass	Apache-2.0	yesterday
Bump VersionVeryGoodOpenSource/very_good_analysis	477	—	~2.6k	Automated safety check: Pass	MIT	11 days ago
Frb Lintfzyzcjy/flutter_rust_bridge	5.4k	—	~152	Automated safety check: Pass	MIT	2 days ago
Very Good Analysis UpgradeVeryGoodOpenSource/vgv-ai-flutter-plugin	170	—	~2.6k	Automated safety check: Notes	MIT	3 days ago
Code Guidelinesgetsentry/sentry-dart	873	—	~2.2k	Automated safety check: Pass	MIT	yesterday
Dart 3 Updatesevanca/flutter-ai-rules	650	—	~2k	Automated safety check: Pass	MIT	25 days ago

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Questions about Dart Long Lines

What does Dart Long Lines do?

Guidelines for handling long lines in Dart code to adhere to the 80-column rule. Dart Long Lines is an agent skill from kevmoo/dash_skills. Guidelines for handling long lines in Dart code to adhere to the 80-column rule.

When should I use Dart Long Lines?

Dart Long Lines fits situations like: tasks that involve Cross-platform mobile apps; tasks that involve Linting and formatting.

How do I install Dart Long Lines in Claude Code?

Run `npx skills add kevmoo/dash_skills --skill dart-long-lines -a claude-code`. Or copy the skill folder (skills/dart-long-lines in kevmoo/dash_skills) into .claude/skills/dart-long-lines in your project. Claude Code loads it when a task matches its description.

How do I install Dart Long Lines in Codex?

Run `npx skills add kevmoo/dash_skills --skill dart-long-lines -a codex`. Or copy the skill folder (skills/dart-long-lines in kevmoo/dash_skills) into .agents/skills/dart-long-lines in your project. Codex loads it when a task matches its description.

Can I use Dart Long Lines 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 kevmoo/dash_skills --skill dart-long-lines -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/dart-long-lines, .gemini/skills/dart-long-lines, .github/skills/dart-long-lines and .opencode/skills/dart-long-lines in your project.

What does Dart Long Lines need to run?

Going by SKILL.md and its folder, Dart Long Lines needs the command-line tools its instructions call (dart).

Does Dart Long Lines access the network?

SKILL.md names 1 domain. As links in the text: dart.dev. This is read from the text; nothing was executed.

Is Dart Long Lines 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 Dart Long Lines use?

Dart Long Lines is published under the Apache-2.0 licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Dart Long Lines use?

About 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 Dart Long Lines?

Skills that share tags, products or a category with Dart Long Lines: Bump Version (VeryGoodOpenSource/very_good_analysis, 477 stars), Frb Lint (fzyzcjy/flutter_rust_bridge, 5.4k stars), Very Good Analysis Upgrade (VeryGoodOpenSource/vgv-ai-flutter-plugin, 170 stars) and Code Guidelines (getsentry/sentry-dart, 873 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Dart Long Lines?

kevmoo (a GitHub user) maintains it in kevmoo/dash_skills, which has 147 GitHub stars. The repository holds 12 skills in this directory. The repository was last updated on October 8, 2026.

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

Install Dart Long Lines

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Dart Long Lines

1. When to use this skill

When NOT to use (Abstention Guardrails)

Discovery

Automated Analysis

Manual Search

2. Guidelines

Format First

Code Comments

Documentation Comments (///)

Long Strings

Format and Analyze After Changes

3. Examples

Documentation Comment Link

Adjacent String Literals

Multi-line String Migration

Files

Compare with similar skills

Similar skills

More from kevmoo/dash_skills

Related

Questions about Dart Long Lines

Documentation Comments (`///`)