Dinero Best Practices
dinerojs/dinero.js
Core best practices for the Dinero.js money library. An agent skill from dinerojs/dinero.js.
Workflow for refactoring discipline-level guides (e.g., JavaScript, CSS) to remove "Common Knowledge" by generating and comparing against model-specific "Knowledge Mirrors".
Install Project Discipline Guides
$ npx skills add GoogleChrome/modern-web-guidance-src --skill project-discipline-guides -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install GoogleChrome/modern-web-guidance-src project-discipline-guides --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/GoogleChrome/modern-web-guidance-src.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/project-discipline-guides .claude/skills/project-discipline-guides && 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 "project-discipline-guides" agent skill from https://github.com/GoogleChrome/modern-web-guidance-src/tree/main/.agents/skills/project-discipline-guides into .claude/skills/project-discipline-guides/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "project-discipline-guides", 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/GoogleChrome/modern-web-guidance-src/tree/main/.agents/skills/project-discipline-guidesType 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 GoogleChrome/modern-web-guidance-src --skill project-discipline-guides -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install GoogleChrome/modern-web-guidance-src project-discipline-guides --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/GoogleChrome/modern-web-guidance-src.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/project-discipline-guides .agents/skills/project-discipline-guides && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "project-discipline-guides" agent skill from https://github.com/GoogleChrome/modern-web-guidance-src/tree/main/.agents/skills/project-discipline-guides into .agents/skills/project-discipline-guides/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "project-discipline-guides", 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 GoogleChrome/modern-web-guidance-src --skill project-discipline-guides -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install GoogleChrome/modern-web-guidance-src project-discipline-guides --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/GoogleChrome/modern-web-guidance-src.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/project-discipline-guides .cursor/skills/project-discipline-guides && 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 "project-discipline-guides" agent skill from https://github.com/GoogleChrome/modern-web-guidance-src/tree/main/.agents/skills/project-discipline-guides into .cursor/skills/project-discipline-guides/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "project-discipline-guides", 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/GoogleChrome/modern-web-guidance-src.git --path .agents/skills/project-discipline-guides--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 GoogleChrome/modern-web-guidance-src --skill project-discipline-guides -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install GoogleChrome/modern-web-guidance-src project-discipline-guides --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/GoogleChrome/modern-web-guidance-src.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/project-discipline-guides .gemini/skills/project-discipline-guides && 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 "project-discipline-guides" agent skill from https://github.com/GoogleChrome/modern-web-guidance-src/tree/main/.agents/skills/project-discipline-guides into .gemini/skills/project-discipline-guides/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "project-discipline-guides", 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 GoogleChrome/modern-web-guidance-src project-discipline-guidesInstalls 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 GoogleChrome/modern-web-guidance-src --skill project-discipline-guides -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/GoogleChrome/modern-web-guidance-src.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/project-discipline-guides .github/skills/project-discipline-guides && 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 "project-discipline-guides" agent skill from https://github.com/GoogleChrome/modern-web-guidance-src/tree/main/.agents/skills/project-discipline-guides into .github/skills/project-discipline-guides/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "project-discipline-guides", 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 GoogleChrome/modern-web-guidance-src --skill project-discipline-guides -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install GoogleChrome/modern-web-guidance-src project-discipline-guides --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/GoogleChrome/modern-web-guidance-src.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/project-discipline-guides .opencode/skills/project-discipline-guides && 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 "project-discipline-guides" agent skill from https://github.com/GoogleChrome/modern-web-guidance-src/tree/main/.agents/skills/project-discipline-guides into .opencode/skills/project-discipline-guides/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "project-discipline-guides", 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
project-discipline-guides- GitHub stars
- 1.1k
- Token cost
- ~1.1k tokens
- SKILL.md length
- 543 words
- Files
- 8 (incl. scripts)
- Skills in repo
- 12
- Repo updated
- First seen
- Licence
- Apache-2.0
At a glance
Workflow for refactoring discipline-level guides (e.g., JavaScript, CSS) to remove "Common Knowledge" by generating and comparing against model-specific "Knowledge Mirrors".
- Works in 4 steps: Generate Knowledge Mirrors → Perform the Inverse Filter (Agent Task) → Apply Surgical Edits → …
- Tasks that involve Refactoring
- SKILL.md covers Workflow: The Inverse… and Core Principles
- Runs TypeScript scripts from its folder; calls node
What it does
Project Discipline Guides is an agent skill from GoogleChrome/modern-web-guidance-src. Workflow for refactoring discipline-level guides (e.g., JavaScript, CSS) to remove "Common Knowledge" by generating and comparing against model-specific "Knowledge Mirrors".
Its SKILL.md is about 1.1k tokens, which your agent loads only when the skill is triggered. The skill folder holds 10 other files, including scripts (for example `intersection_prompt.md`, `mirror_prompt.md` and `mirrors/javascript/claude_mirror.md`).
It sits in Development, covering Refactoring. It works with JavaScript. The licence is Apache-2.0.
When your agent uses it
- Tasks that involve Refactoring
Example prompts
- “Common Knowledge”
- “Knowledge Mirrors”
- “/project-discipline-guides”
Requirements
- Node.js
Workflow steps
4 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 7569f28. 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
Ships 1 file in scripts/ (TypeScript), which the agent can run.
Shell commands in SKILL.md call:
node
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
Project Discipline Guides loads about 1.1k tokens when it runs. Until then it costs about 50 tokens; SKILL.md has 543 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); the scripts in this folder are not scanned.
SKILL.md
The full file from GoogleChrome/modern-web-guidance-src at commit 7569f28, republished under its Apache-2.0 licence (© GoogleChrome). 543 words, ~1,129 tokens.
Download SKILL.mdSave it as
.claude/skills/project-discipline-guides/SKILL.md (or your agent's skills folder). This skill also uses 7 other files; get the full folder from GitHub.- name
- project-discipline-guides
- description
- Workflow for refactoring discipline-level guides (e.g., JavaScript, CSS) to remove "Common Knowledge" by generating and comparing against model-specific "Knowledge Mirrors".
Project Discipline Guides
This skill facilitates the "Differential Knowledge Refactor" of technical guides. It ensures that SKILL.md files for specific disciplines are lean, context-efficient, and strictly additive to what modern AI models already know natively.
Workflow: The Inverse Knowledge Filter
The goal is to aggressively "whittle down" a target guide (the Target) by removing any content that is natively understood by modern coding models.
1. Generate Knowledge Mirrors
Use the provided script to generate "Redundancy Mirrors"—comprehensive guides of what Gemini, Claude, and Codex consider "Common Knowledge" for a given discipline, and intersect them into a single LCD mirror.
# Ensure that model setup is configured (instructions are in the top level readme)
node .agents/skills/project-discipline-guides/scripts/generate_mirrors.ts <discipline_name>This will create files inside the .agents/skills/project-discipline-guides/mirrors/ directory:
mirrors/<discipline>/gemini_mirror.md(via Gemini - temporary)mirrors/<discipline>/claude_mirror.md(via Claude - temporary)mirrors/<discipline>/codex_mirror.md(via Codex - temporary)mirrors/<discipline>/mirror.md(Unified Redundancy Mirror intersection)
[!IMPORTANT] Ensure that the unified Redundancy Mirror (
.agents/skills/project-discipline-guides/mirrors/<discipline>/mirror.md) has been successfully generated. This mirror represents the exact mathematical intersection of all three source models, preventing pruning errors and reducing context window overhead.
2. Perform the Inverse Filter (Agent Task)
As the agent, read the Target guide and the unified Redundancy Mirror (.agents/skills/project-discipline-guides/mirrors/<discipline>/mirror.md).
- Strict A - B Comparison: Compare rules in the Target guide strictly against the unified Redundancy Mirror. You should ONLY remove a rule or pattern from the Target guide if it is fully and clearly covered in the Redundancy Mirror.
- No Subjective Self-Attestation: Rely exclusively on the literal content present in the Redundancy Mirror. Do not prune rules based on your own subjective self-attestation of what you "know" or would do by default. If a concept is not in the Redundancy Mirror, it remains in the Target guide.
- Avoid Blind Bullet-Point Deletions: If a single bullet point or rule in the Target contains multiple guidelines or APIs, do not delete the entire bullet point just because some parts of it are common knowledge. Carefully split or dissect the rule, pruning only the redundant parts and explicitly retaining any differential knowledge.
- Preserve Differential Knowledge: Keep only what is unique to this project or necessary to guide the AI effectively. This generally includes:
- Rules that counter common AI biases.
- Conventions chosen among valid alternatives.
- Advanced performance patterns, security constraints, or heuristics that models know but often omit in default outputs.
[!WARNING] Keep the Refactor Scoped: The primary and sole goal of this skill is reduction of redundant common knowledge. Do not add new rules, modify logic, or introduce unrelated guidelines in this refactoring pass. Keep the changes highly focused and easy to review.
Show full SKILL.md (138 more words)Show less
3. Apply Surgical Edits
Perform the cleanup on the Target file. Aim for surgical edits that preserve the file's structure while removing unnecessary content.
In your response, provide an explanation of the changes made and the rationale for what was removed or kept.
4. Verification Step
After applying edits, perform a self-verification:
- Contrast Check: Verify that none of the rules in the new guide are present in the Redundancy Mirror.
- Preservation Check: Ensure that critical project-specific rules, behavioral steering, and any specific advanced APIs (such as
Object.groupBy()) were not accidentally removed.
Core Principles
- Delete Redundancies: If a model natively "knows" a rule, it does not belong in the skill.
- Preserve Signal: Keep instructions that force the model into "Senior Engineer" mode or align with specific project architecture.
- Context Efficiency: A lean skill is a fast and cheap skill.
© GoogleChrome, 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 (scripts) in .agents/skills/project-discipline-guides of GoogleChrome/modern-web-guidance-src.
- SKILL.md
- intersection_prompt.md
- mirror_prompt.md
- mirrors/javascript/claude_mirror.md
- mirrors/javascript/codex_mirror.md
- mirrors/javascript/gemini_mirror.md
- mirrors/javascript/mirror.md
- scripts/generate_mirrors.ts
Open the folder on GitHubat commit 7569f28
Compare with similar skills
Project Discipline Guides 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 |
|---|---|---|---|---|---|---|
| Project Discipline Guides this skillGoogleChrome/modern-web-guidance-src | 1.1k | — | ~1.1k | Automated safety check: Pass | Apache-2.0 | |
| Dinero Best Practicesdinerojs/dinero.js | 6.8k | — | ~756 | Automated safety check: Pass | MIT | |
| ast-grep Codemod Referencewarp-drive-data/warp-drive | 3.2k | — | ~2.6k | Automated safety check: Pass | MIT | |
| React Best Practicesshapeshift/web | 206 | 1 repos | ~2k | Automated safety check: Pass | MIT | |
| DRY Refactoring With jscpdkucherenko/jscpd | 6.4k | — | ~2.1k | Automated safety check: Pass | MIT | |
| Coding Agentmastra-ai/mastra | 29k | — | ~2.3k | Automated safety check: Pass | Custom licence |
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Works with
Categories
Questions about Project Discipline Guides
What does Project Discipline Guides do?
Workflow for refactoring discipline-level guides (e.g., JavaScript, CSS) to remove "Common Knowledge" by generating and comparing against model-specific "Knowledge Mirrors". Project Discipline Guides is an agent skill from GoogleChrome/modern-web-guidance-src., JavaScript, CSS) to remove "Common Knowledge" by generating and comparing against model-specific "Knowledge Mirrors".
When should I use Project Discipline Guides?
Project Discipline Guides fits situations like: tasks that involve Refactoring.
How do I install Project Discipline Guides in Claude Code?
Run `npx skills add GoogleChrome/modern-web-guidance-src --skill project-discipline-guides -a claude-code`. Or copy the skill folder (.agents/skills/project-discipline-guides in GoogleChrome/modern-web-guidance-src) into .claude/skills/project-discipline-guides in your project. Claude Code loads it when a task matches its description.
How do I install Project Discipline Guides in Codex?
Run `npx skills add GoogleChrome/modern-web-guidance-src --skill project-discipline-guides -a codex`. Or copy the skill folder (.agents/skills/project-discipline-guides in GoogleChrome/modern-web-guidance-src) into .agents/skills/project-discipline-guides in your project. Codex loads it when a task matches its description.
Can I use Project Discipline Guides 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 GoogleChrome/modern-web-guidance-src --skill project-discipline-guides -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/project-discipline-guides, .gemini/skills/project-discipline-guides, .github/skills/project-discipline-guides and .opencode/skills/project-discipline-guides in your project.
What does Project Discipline Guides need to run?
Going by SKILL.md and its folder, Project Discipline Guides needs TypeScript for the scripts in its folder and the command-line tools its instructions call (node). Our summary lists: Node.js.
Does Project Discipline Guides 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 Project Discipline Guides 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. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.
What licence does Project Discipline Guides use?
Project Discipline Guides 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 Project Discipline Guides use?
About 1.1k tokens (SKILL.md is roughly 4.5k 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 Project Discipline Guides?
Skills that share tags, products or a category with Project Discipline Guides: Dinero Best Practices (dinerojs/dinero.js, 6.8k stars), ast-grep Codemod Reference (warp-drive-data/warp-drive, 3.2k stars), React Best Practices (shapeshift/web, 206 stars) and DRY Refactoring With jscpd (kucherenko/jscpd, 6.4k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Project Discipline Guides?
GoogleChrome (a GitHub organization) maintains it in GoogleChrome/modern-web-guidance-src, which has 1,143 GitHub stars. The repository holds 12 skills in this directory. The repository was last updated on October 9, 2026.
Source: GoogleChrome/modern-web-guidance-src on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.