Agent skill

Dart Multiline Strings

Guidelines and best practices for refactoring consecutive prints, single-line string concatenations, and complex output blocks into triple-quoted multi-line string literals (''' or """) in Dart.

Apache-2.0Auto-check passedDevelopment

Install Dart Multiline Strings

skills CLI

$ npx skills add kevmoo/dash_skills --skill dart-multiline-strings -a claude-code

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

GitHub CLI

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

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-multiline-strings -a codex

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

GitHub CLI

$ gh skill install kevmoo/dash_skills dart-multiline-strings --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-multiline-strings .agents/skills/dart-multiline-strings && 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-multiline-strings" agent skill from https://github.com/kevmoo/dash_skills/tree/main/skills/dart-multiline-strings into .agents/skills/dart-multiline-strings/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dart-multiline-strings", 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-multiline-strings -a cursor

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

GitHub CLI

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

--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-multiline-strings -a gemini-cli

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

GitHub CLI

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

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-multiline-strings -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-multiline-strings .github/skills/dart-multiline-strings && 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-multiline-strings" agent skill from https://github.com/kevmoo/dash_skills/tree/main/skills/dart-multiline-strings into .github/skills/dart-multiline-strings/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dart-multiline-strings", 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-multiline-strings -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-multiline-strings --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-multiline-strings .opencode/skills/dart-multiline-strings && 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-multiline-strings" agent skill from https://github.com/kevmoo/dash_skills/tree/main/skills/dart-multiline-strings into .opencode/skills/dart-multiline-strings/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dart-multiline-strings", 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-multiline-strings
GitHub stars: 147
Token cost: ~1.5k tokens
SKILL.md length: 571 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 and best practices for refactoring consecutive prints, single-line string concatenations, and complex output blocks into triple-quoted multi-line string literals (''' or """) in Dart.

Works in 3 steps: When to use this skill → Guidelines → Examples
Tasks that involve Refactoring
SKILL.md covers 1. When to use this skill, Discovery, 2. Guidelines and 3. Examples
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Dart Multiline Strings is an agent skill from kevmoo/dash_skills. Guidelines and best practices for refactoring consecutive prints, single-line string concatenations, and complex output blocks into triple-quoted multi-line string literals (''' or """) in Dart.

Its SKILL.md is about 1.5k 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 Refactoring and Cross-platform mobile apps. 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 Refactoring
Tasks that involve Cross-platform mobile apps

Example prompts

“Use the dart-multiline-strings skill to guideline and best practices for refactoring consecutive prints, single-line string concatenations, and…”
“/dart-multiline-strings”

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 d3439fb. 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

Dart Multiline Strings loads about 1.5k tokens when it runs. Until then it costs about 54 tokens; SKILL.md has 571 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~54
When it runs · the whole SKILL.md, loaded when a task matches: ~1.5k

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 d3439fb, republished under its Apache-2.0 licence (© kevmoo). 571 words, ~1,459 tokens.

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

name: dart-multiline-strings
description: Guidelines and best practices for refactoring consecutive prints, single-line string concatenations, and complex output blocks into triple-quoted multi-line string literals (''' or """) in Dart.
license: Apache-2.0
key_features: Triple-quoted multiline strings, Print & concatenation refactoring, Formatting large text blocks

Dart Multi-line Strings

1. When to use this skill

Use this skill when:

Refactoring consecutive print() or stdout.writeln() statements into a single, cohesive output block.
Simplifying string literals that span multiple lines, contain embedded newlines (\n), or use nested indentations.
Formatting large user-facing text output (like CLI help menus, reports, or templated messages) to be readable, maintainable, and performant.

When NOT to use (Abstention Guardrails)

Do NOT refactor to multiline strings when:

Short, Single-Line Outputs: Strings that comfortably fit on a single line (<80 chars) without embedded newlines.
Localized String Catalogs: Strings that are looked up from localization bundles (e.g. intl, ARB files), where line breaks or formatting must conform to external translation tooling.
Raw Query Strings with Strict Whitespace Semantics: Protocol strings, strict CSV rows, or queries where indentation whitespace inside triple quotes would alter payload semantics or introduce unintended leading spaces.
Streaming or Incremental I/O: Progress bars, spinners, or interactive console streams where individual writes occur with delays or flushing between lines.

Discovery

To find candidate code blocks for multi-line string refactoring:

Look for multiple back-to-back print() or stdout.writeln() calls inside a function, especially inside loops, console views, or CLI controllers.
Look for single-line strings heavily loaded with \n escape sequences.
Look for multiple string concatenations using the + operator or adjacent string literal splits that are meant to represent multi-line outputs.

2. Guidelines

Combine Consecutive Outputs

Instead of calling print() repeatedly for a multi-line output, group the contents into a single triple-quoted string literal: print('''...''').

Explicit and Clean Alignment

In a triple-quoted literal, the exact spacing and formatting inside the quotes are preserved. Use this to specify indentation levels visually instead of using manually padded space prefixes (e.g., ' ').

Remove Empty Print Calls

If there are empty print() or print('') statements serving as vertical separators between output segments, replace them by letting the trailing newline of a multi-line string block handle the separation naturally.

Handling the First Newline

If the opening triple-quote is immediately followed by a newline, the compiler discards it.

If you do not want a leading blank line, start the string content on a fresh line in the source code for clean layout.
If you do want a leading blank line in the output, leave an extra empty line inside the triple-quoted block, or use \n explicitly at the beginning:
dart
```
print('''

This starts with one blank line above it.''');
```

Show full SKILL.md (216 more words)Show less

Handling the Trailing Newline & `print()`

print() automatically appends a trailing newline to the printed output.

If you place the closing ''' on a new line (\n''');), an extra trailing blank line will be printed.
To avoid unintended trailing blank lines, place the closing triple-quotes immediately after the final character:
dart
```
// ✅ Emits standard output with no extra trailing empty line:
print('''
Header
Content''');
```

Avoiding Ghost Blank Lines in Conditional Interpolations

When injecting optional content via interpolation (${condition ? '...' : ''}), placing the ${...} on its own line leaves behind its enclosing newline when the condition evaluates to '', producing an empty blank line in the output.

Include the leading newline inside the conditional string literal so the newline only renders when the content is present:

dart

// ✅ Clean conditional rendering without ghost blank lines:
print('''
Branch Details:
    Name: $branch${hasWarning ? '\n    WARNING: $warningMessage' : ''}''');

80-Character Line Limit Exemption

The lines_longer_than_80_chars lint rule automatically ignores lines inside multiline string literals. You can write long lines inside triple-quotes without triggering linter warnings or being forced to break them up.

Dynamic Switch Expressions inside Interpolation

Leverage Dart 3 switch expressions directly inside string interpolations to dynamically select and inject optional lines, conditional labels, or helper instructions. This avoids cluttering the surrounding code with imperatively constructed strings or multiple if statements:

dart

print('''
Status: ${status.isSuccess ? 'PASS' : 'FAIL'}${switch (status) {
  Status.failed => '\nError details: $errorMessage',
  _ => '',
}}''');

3. Examples

Refactoring Consecutive Prints with Indentation

Avoid:

dart

void printGerritView(String branch, String desc, bool hasConflicts) {
  print('Branch Details:');
  print('    Name:        ' + branch);
  print('    Description: ' + desc);
  print('');
  if (hasConflicts) {
    print('    WARNING: This branch has conflicts.');
    print('    Run `git merge origin/main` to resolve.');
  }
}

Prefer:

dart

void printGerritView(String branch, String desc, bool hasConflicts) {
  print('''
Branch Details:
    Name:        $branch
    Description: $desc${hasConflicts ? '''

    WARNING: This branch has conflicts.
    Run `git merge origin/main` to resolve.''' : ''}''');
}

Files

SKILL.md and 1 other file in skills/dart-multiline-strings of kevmoo/dash_skills.

SKILL.md
evals/evals.json

Open the folder on GitHubat commit d3439fb

Compare with similar skills

Dart Multiline Strings 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 Multiline Strings compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Dart Multiline Strings this skillkevmoo/dash_skills	147	—	~1.5k	Automated safety check: Pass	Apache-2.0	yesterday
Code Guidelinesgetsentry/sentry-dart	873	—	~2.2k	Automated safety check: Pass	MIT	yesterday
Dart 3 Updatesevanca/flutter-ai-rules	649	—	~2k	Automated safety check: Pass	MIT	24 days ago
Effective Dartevanca/flutter-ai-rules	649	—	~2k	Automated safety check: Pass	MIT	24 days ago
Test Guidelinesgetsentry/sentry-dart	873	—	~3.1k	Automated safety check: Pass	MIT	yesterday
Squadron Workerd-markey/squadron	138	—	~1.6k	Automated safety check: Pass	MIT	16 days ago

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Questions about Dart Multiline Strings

What does Dart Multiline Strings do?

Guidelines and best practices for refactoring consecutive prints, single-line string concatenations, and complex output blocks into triple-quoted multi-line string literals (''' or """) in Dart. Dart Multiline Strings is an agent skill from kevmoo/dash_skills. Guidelines and best practices for refactoring consecutive prints, single-line string concatenations, and complex output blocks into triple-quoted multi-line string literals (''' or """) in Dart.

When should I use Dart Multiline Strings?

Dart Multiline Strings fits situations like: tasks that involve Refactoring; tasks that involve Cross-platform mobile apps.

How do I install Dart Multiline Strings in Claude Code?

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

How do I install Dart Multiline Strings in Codex?

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

Can I use Dart Multiline Strings 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-multiline-strings -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-multiline-strings, .gemini/skills/dart-multiline-strings, .github/skills/dart-multiline-strings and .opencode/skills/dart-multiline-strings in your project.

What does Dart Multiline Strings need to run?

SKILL.md names no scripts, command-line tools or credentials: Dart Multiline Strings is instructions for the agent only.

Does Dart Multiline Strings 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 Dart Multiline Strings 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 Multiline Strings use?

Dart Multiline Strings 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 Multiline Strings use?

About 1.5k tokens (SKILL.md is roughly 5.8k 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 Multiline Strings?

Skills that share tags, products or a category with Dart Multiline Strings: Code Guidelines (getsentry/sentry-dart, 873 stars), Dart 3 Updates (evanca/flutter-ai-rules, 649 stars), Effective Dart (evanca/flutter-ai-rules, 649 stars) and Test 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 Multiline Strings?

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 Multiline Strings

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 Multi-line Strings

1. When to use this skill

When NOT to use (Abstention Guardrails)

Discovery

2. Guidelines

Combine Consecutive Outputs

Explicit and Clean Alignment

Remove Empty Print Calls

Handling the First Newline

Handling the Trailing Newline & print()

Avoiding Ghost Blank Lines in Conditional Interpolations

80-Character Line Limit Exemption

Dynamic Switch Expressions inside Interpolation

3. Examples

Refactoring Consecutive Prints with Indentation

Files

Compare with similar skills

Similar skills

More from kevmoo/dash_skills

Related

Questions about Dart Multiline Strings

Handling the Trailing Newline & `print()`