Test Guidelines
getsentry/sentry-dart
Enforce Sentry Dart/Flutter SDK test conventions for naming, structure, and fixtures.
Searches for duplicate code, duplicate tests, and dead code, then safely merges or removes them.
Install Code Dedup
$ npx skills add MelbourneDeveloper/dart_node --skill code-dedup -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install MelbourneDeveloper/dart_node code-dedup --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/MelbourneDeveloper/dart_node.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/code-dedup .claude/skills/code-dedup && 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 "code-dedup" agent skill from https://github.com/MelbourneDeveloper/dart_node/tree/main/.claude/skills/code-dedup into .claude/skills/code-dedup/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-dedup", 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/MelbourneDeveloper/dart_node/tree/main/.claude/skills/code-dedupType 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 MelbourneDeveloper/dart_node --skill code-dedup -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install MelbourneDeveloper/dart_node code-dedup --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/MelbourneDeveloper/dart_node.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/code-dedup .agents/skills/code-dedup && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "code-dedup" agent skill from https://github.com/MelbourneDeveloper/dart_node/tree/main/.claude/skills/code-dedup into .agents/skills/code-dedup/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-dedup", 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 MelbourneDeveloper/dart_node --skill code-dedup -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install MelbourneDeveloper/dart_node code-dedup --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/MelbourneDeveloper/dart_node.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/code-dedup .cursor/skills/code-dedup && 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 "code-dedup" agent skill from https://github.com/MelbourneDeveloper/dart_node/tree/main/.claude/skills/code-dedup into .cursor/skills/code-dedup/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-dedup", 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/MelbourneDeveloper/dart_node.git --path .claude/skills/code-dedup--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 MelbourneDeveloper/dart_node --skill code-dedup -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install MelbourneDeveloper/dart_node code-dedup --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/MelbourneDeveloper/dart_node.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/code-dedup .gemini/skills/code-dedup && 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 "code-dedup" agent skill from https://github.com/MelbourneDeveloper/dart_node/tree/main/.claude/skills/code-dedup into .gemini/skills/code-dedup/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-dedup", 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 MelbourneDeveloper/dart_node code-dedupInstalls 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 MelbourneDeveloper/dart_node --skill code-dedup -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/MelbourneDeveloper/dart_node.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/code-dedup .github/skills/code-dedup && 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 "code-dedup" agent skill from https://github.com/MelbourneDeveloper/dart_node/tree/main/.claude/skills/code-dedup into .github/skills/code-dedup/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-dedup", 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 MelbourneDeveloper/dart_node --skill code-dedup -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install MelbourneDeveloper/dart_node code-dedup --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/MelbourneDeveloper/dart_node.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/code-dedup .opencode/skills/code-dedup && 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 "code-dedup" agent skill from https://github.com/MelbourneDeveloper/dart_node/tree/main/.claude/skills/code-dedup into .opencode/skills/code-dedup/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-dedup", 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
code-dedup- GitHub stars
- 113
- Token cost
- ~603 tokens
- SKILL.md length
- 335 words
- Files
- 1
- Skills in repo
- 15
- Repo updated
- First seen
- Licence
- None found
At a glance
Searches for duplicate code, duplicate tests, and dead code, then safely merges or removes them.
- Works in 6 steps: Inventory test coverage → Scan for dead code → Scan for duplicate code → …
- The user says deduplicate
- SKILL.md covers Prerequisites — hard gate, Steps and Rules
- Calls make and dart
What it does
Code Dedup is an agent skill from MelbourneDeveloper/dart_node. Searches for duplicate code, duplicate tests, and dead code, then safely merges or removes them. Use when the user says "deduplicate", "find duplicates", "remove dead code", "DRY up", or "code dedup". Requires test coverage — refuses to touch untested code.
Its SKILL.md is about 600 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Testing & QA, covering Test coverage and Code simplification. It works with Dart. The repository describes itself as: Write your entire stack in Dart: React web apps, React Native mobile apps with Expo, and Node.js Express backends.
When your agent uses it
- The user says deduplicate
- Find duplicates
- Remove dead code
Example prompts
- “deduplicate”
- “find duplicates”
- “remove dead code”
- “/code-dedup”
Workflow steps
6 steps, taken from the step headings in SKILL.md.
- Inventory test coverage
- Scan for dead code
- Scan for duplicate code
- Scan for duplicate tests
- Apply changes (one at a time)
- Final verification
What it can do on your machine
Read from SKILL.md and the folder at commit 5587886. 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:
makedart
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
Code Dedup loads about 603 tokens when it runs. Until then it costs about 67 tokens; SKILL.md has 335 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
Without a licence we can't republish the file, so here is its outline and opening line. It has 335 words (~603 tokens).
“Carefully search for duplicate code, duplicate tests, and dead code across the repo. Merge duplicates and delete dead code — but only when test coverage proves the change is safe.”
- name
- code-dedup
Files
Just SKILL.md in .claude/skills/code-dedup of MelbourneDeveloper/dart_node.
Open the folder on GitHubat commit 5587886
Compare with similar skills
Code Dedup 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 |
|---|---|---|---|---|---|---|
| Code Dedup this skillMelbourneDeveloper/dart_node | 113 | — | ~603 | Automated safety check: Pass | None | |
| Test Guidelinesgetsentry/sentry-dart | 873 | — | ~3.1k | Automated safety check: Pass | MIT | |
| Code DedupNimblesite/SharpLsp | 137 | — | ~1.6k | Automated safety check: Pass | MIT | |
| Dart Test Coveragekevmoo/dash_skills | 147 | — | ~1.1k | Automated safety check: Pass | Apache-2.0 | |
| Green GateVeryGoodOpenSource/vgv-ai-flutter-plugin | 169 | — | ~4.7k | Automated safety check: Notes | MIT | |
| Refactor OpCVCUDA/CV-CUDA | 2.7k | — | ~1.5k | Automated safety check: Pass | Custom licence |
Similar skills
- Official
Code Dedup
Nimblesite/SharpLsp
Searches for duplicate code, duplicate tests, and dead code across the SharpLsp repo, then safely merges or removes them.
Dart Test Coverage
kevmoo/dash_skills
Understand and improve test coverage in a Dart package. An agent skill from kevmoo/dash_skills.
Green Gate
VeryGoodOpenSource/vgv-ai-flutter-plugin
Drives a Dart or Flutter package fully green through a verify-fix-rerun loop across four gates: analyze, format, test, coverage.
Refactor Op
CVCUDA/CV-CUDA
Find and safely apply per-operator refactoring / redundancy-reduction opportunities in a CV-CUDA operator (near-duplicate Tensor/VarShape kernels, reinvented shared utilities, dead code).
Test Writing Workflow
iOfficeAI/AionUi
Sets the test-writing workflow for the repository: risk-first scenario lists, behavior-focused Vitest tests, a full run before each commit and a coverage target.
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Upgrade all dependencies/packages to their latest versions for the detected language(s).
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Related
Works with
Categories
Questions about Code Dedup
What does Code Dedup do?
Searches for duplicate code, duplicate tests, and dead code, then safely merges or removes them. Code Dedup is an agent skill from MelbourneDeveloper/dart_node. Searches for duplicate code, duplicate tests, and dead code, then safely merges or removes them.
When should I use Code Dedup?
Code Dedup fits situations like: the user says deduplicate; find duplicates; remove dead code.
How do I install Code Dedup in Claude Code?
Run `npx skills add MelbourneDeveloper/dart_node --skill code-dedup -a claude-code`. Or copy the skill folder (.claude/skills/code-dedup in MelbourneDeveloper/dart_node) into .claude/skills/code-dedup in your project. Claude Code loads it when a task matches its description.
How do I install Code Dedup in Codex?
Run `npx skills add MelbourneDeveloper/dart_node --skill code-dedup -a codex`. Or copy the skill folder (.claude/skills/code-dedup in MelbourneDeveloper/dart_node) into .agents/skills/code-dedup in your project. Codex loads it when a task matches its description.
Can I use Code Dedup 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 MelbourneDeveloper/dart_node --skill code-dedup -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/code-dedup, .gemini/skills/code-dedup, .github/skills/code-dedup and .opencode/skills/code-dedup in your project.
What does Code Dedup need to run?
Going by SKILL.md and its folder, Code Dedup needs the command-line tools its instructions call (make and dart).
Does Code Dedup 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 Code Dedup 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 Code Dedup use?
No licence was found for Code Dedup or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Code Dedup use?
About 603 tokens (SKILL.md is roughly 2.4k 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 Code Dedup?
Skills that share tags, products or a category with Code Dedup: Test Guidelines (getsentry/sentry-dart, 873 stars), Code Dedup (Nimblesite/SharpLsp, 137 stars), Dart Test Coverage (kevmoo/dash_skills, 147 stars) and Green Gate (VeryGoodOpenSource/vgv-ai-flutter-plugin, 169 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Code Dedup?
MelbourneDeveloper (a GitHub user) maintains it in MelbourneDeveloper/dart_node, which has 113 GitHub stars. The repository holds 15 skills in this directory. The repository was last updated on September 14, 2026.
Source: MelbourneDeveloper/dart_node on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.