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Agent skill

Chunking Numeric And Otp

by hashgraph-online in hashgraph-online/awesome-codex-plugins

A skill your agent uses when designing inputs or displays for numeric strings — phone numbers, OTP / verification codes, credit card numbers, account IDs, license keys, currency, dates, social…

Apache-2.0Auto-check passed

Install Chunking Numeric And Otp

skills CLI
$ npx skills add hashgraph-online/awesome-codex-plugins --skill chunking-numeric-and-otp -a claude-code

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

GitHub CLI
$ gh skill install hashgraph-online/awesome-codex-plugins chunking-numeric-and-otp --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/hashgraph-online/awesome-codex-plugins.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/HDeibler/universal-design-principles/plugins/cognition-and-learnability-principles/skills/chunking-numeric-and-otp .claude/skills/chunking-numeric-and-otp && 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/

Facts

Skill name
chunking-numeric-and-otp
GitHub stars
1.3k
Token cost
~1.8k tokens
SKILL.md length
696 words
Files
2 (incl. references)
Skills in repo
714
Repo updated
First seen
Licence
Apache-2.0

At a glance

A skill your agent uses when designing inputs or displays for numeric strings — phone numbers, OTP / verification codes, credit card numbers, account IDs, license keys, currency, dates, social…

  • Works in 4 steps: The "read it aloud" test. Try reading… → The cross-locale check. For currency and… → The clipboard / autofill check. Does… → …
  • Designing inputs
  • SKILL.md covers Standard chunkings, OTP / verification code entry, Phone number entry and Credit card display, plus 5 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Chunking Numeric And Otp is an agent skill from hashgraph-online/awesome-codex-plugins. Use this skill when designing inputs or displays for numeric strings — phone numbers, OTP / verification codes, credit card numbers, account IDs, license keys, currency, dates, social security numbers. Trigger when picking a format for displaying numbers, designing OTP entry UIs, or formatting identifiers in tables and receipts. Sub-aspect of chunking; read that first.

Its SKILL.md is about 1.8k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/numeric-format-conventions.md`).

The repository describes itself as: A curated list of awesome OpenAI Codex / ChatGPT plugins, skills, and resources. The 1 Codex Marketplace. See live plugins at: https://hol.org/plugins/best-codex-plugins. The licence is Apache-2.0.

When your agent uses it

  • Designing inputs
  • Displays for numeric strings — phone numbers
  • OTP / verification codes
  • Credit card numbers

Example prompts

  • “/chunking-numeric-and-otp”

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

  1. The "read it aloud" test. Try reading the chunked number aloud. If it requires re-grouping mentally, the chunking is wrong.
  2. The cross-locale check. For currency and dates, test in at least 2–3 locales. Format mismatches are common.
  3. The clipboard / autofill check. Does pasting the user's clipboard into your input work cleanly? Do password managers fill correctly?
  4. The mobile keyboard check. Numeric inputs should produce numeric keyboards on mobile (inputmode="numeric").

What it can do on your machine

Read from SKILL.md and the folder at commit 9e7b281. 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 html and javascript).

    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):

    • github.com

    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

Chunking Numeric And Otp loads about 1.8k tokens when it runs, and up to ~2.6k if it reads all its reference files. Until then it costs about 100 tokens; SKILL.md has 696 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~100
When it runs · the whole SKILL.md, loaded when a task matches
~1.8k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~2.6k

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 hashgraph-online/awesome-codex-plugins at commit 9e7b281, republished under its Apache-2.0 licence (© hashgraph-online). 696 words, ~1,781 tokens.

Download SKILL.mdSave it as .claude/skills/chunking-numeric-and-otp/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
chunking-numeric-and-otp
description
Use this skill when designing inputs or displays for numeric strings — phone numbers, OTP / verification codes, credit card numbers, account IDs, license keys, currency, dates, social security numbers. Trigger when picking a format for displaying numbers, designing OTP entry UIs, or formatting identifiers in tables and receipts. Sub-aspect of `chunking`; read that first.

Chunking applied to numeric strings

Numbers are the canonical chunking case. A 10-digit phone number, a 16-digit credit card, a 6-digit OTP — without chunking, these are working-memory overloads. With chunking, they're manageable.

Standard chunkings

Conventions that have evolved across industries:

TypeStandard chunkingExample
US phone3-3-4555-867-5309
International phonevaries; usually 2-3-3-2 or similar+44 20 7946 0958
Credit card4-4-4-4 (most) or 4-6-5 (Amex)4242 4242 4242 4242
Social Security (US)3-2-4123-45-6789
OTP / verification3-3 (6-digit) or 4-4 (8-digit)123-456
Bank account (US)varies; often grouped with type110000000 → routing display
ISBN1-3-3-5-1 (ISBN-13)978-3-16-148410-0
IP address4 octets separated by dots192.168.1.1
Date (ISO)4-2-22026-05-02
Currency3-digit groups$1,234,567.89

When in doubt, follow the convention. Users have already learned it.

OTP / verification code entry

The most common modern chunking case in product UI. A 6-digit code from email or SMS, entered into a verification field.

Single field vs. chunked fields

Single field:

html
<input type="text" inputmode="numeric" maxlength="6" pattern="\d{6}" />

Chunked fields (one per digit):

html
<div class="otp-input" role="group" aria-label="Verification code">
  <input type="text" inputmode="numeric" maxlength="1" autocomplete="one-time-code" />
  <input type="text" inputmode="numeric" maxlength="1" />
  <input type="text" inputmode="numeric" maxlength="1" />
  <span class="separator" aria-hidden>—</span>
  <input type="text" inputmode="numeric" maxlength="1" />
  <input type="text" inputmode="numeric" maxlength="1" />
  <input type="text" inputmode="numeric" maxlength="1" />
</div>

The chunked version:

  • Visually matches how the code is presented in email/SMS.
  • Lets the user verify each digit's position mid-entry.
  • Auto-advances focus on each digit (with JS).
  • Supports paste-spread (paste into first input fills all).

The single-field version is simpler to implement and supports SMS-autofill on iOS via autocomplete="one-time-code". Modern apps often offer both: a single field on mobile (where autofill is critical) and chunked on desktop.

OTP UX details
  • Auto-advance focus to the next digit on input.
  • Auto-back focus to previous digit on backspace.
  • Paste support: pasting a 6-digit string into the first input should distribute across all six.
  • autocomplete="one-time-code" on at least one input enables iOS Messages autofill.
  • Numeric keyboard on mobile via inputmode="numeric".
  • Optional auto-submit when the last digit is entered (debate: some users dislike auto-submit because it commits before they can verify).

Phone number entry

Phone numbers vary widely by country. Patterns:

  • US-only forms: enforce 3-3-4 with format mask or chunked inputs.
  • International forms: use a country selector + a free-text number field; format on display rather than enforcing entry format.
  • Dual-purpose (international users + US-heavy): use libphonenumber or similar to validate and format dynamically.
html
<label>
  Phone
  <div class="phone-input">
    <select name="country-code">
      <option value="+1">🇺🇸 +1</option>
      <option value="+44">🇬🇧 +44</option>
      <!-- ... -->
    </select>
    <input type="tel" name="phone" placeholder="555-867-5309" />
  </div>
</label>

Credit card display

In production, never display full card numbers — show the last 4 digits chunked with masking:

**** **** **** 4242

For entry, use 4-4-4-4 chunking with auto-advance, paste support, and card-type detection:

html
<input type="text" inputmode="numeric" autocomplete="cc-number"
       placeholder="1234 5678 9012 3456" />

Built-in browsers and password managers handle most of this if you use the right autocomplete value.

Show full SKILL.md (301 more words)Show less

Account IDs and identifiers

For internal IDs (account IDs, transaction IDs, session IDs):

  • Display chunked if the user might read or transcribe them.
  • Display monospaced so digits and letters align (font-family: monospace; font-variant-numeric: tabular-nums;).
  • Provide one-click copy so users don't have to manually select.
html
<div class="id-display">
  <span class="id-value">ws_8f3c-7a92-1b04</span>
  <button onclick="copyToClipboard('ws_8f3c-7a92-1b04')" aria-label="Copy">📋</button>
</div>

The chunking aids reading aloud (support calls) and verification.

Currency

Currency should always use locale-appropriate digit grouping:

  • US English: $1,234,567.89 (3-digit groups, period decimal).
  • European: €1.234.567,89 (period grouping, comma decimal).
  • Indian: ₹12,34,567.89 (mixed grouping: 2-2-3).

Use Intl.NumberFormat to get this right per locale:

js
new Intl.NumberFormat('en-US', { style: 'currency', currency: 'USD' })
  .format(1234567.89);
// "$1,234,567.89"

Numeric columns in tables should use font-variant-numeric: tabular-nums so digits align vertically.

Anti-patterns

  • Continuous strings: a 16-digit credit card with no chunking. Users can't verify.
  • Inconsistent chunk sizes within a context: phone numbers shown as 3-4-3 here and 5-2-3 there. Each format is a re-learn.
  • Wrong locale grouping: showing 1,234.56 to a German user (who reads it as 1,234.56 = roughly 1,234 plus 56/100 instead of 1234.56).
  • Missing inputmode: a numeric field that opens the alphabet keyboard on mobile. Easy fix; commonly missed.
  • OTP with no auto-advance / paste support: users tab manually between fields; if they paste, only the first field fills.
  • Unmasked credit card display: privacy and security violation. Always mask all but the last 4.

Heuristics

  1. The "read it aloud" test. Try reading the chunked number aloud. If it requires re-grouping mentally, the chunking is wrong.
  2. The cross-locale check. For currency and dates, test in at least 2–3 locales. Format mismatches are common.
  3. The clipboard / autofill check. Does pasting the user's clipboard into your input work cleanly? Do password managers fill correctly?
  4. The mobile keyboard check. Numeric inputs should produce numeric keyboards on mobile (inputmode="numeric").
  • chunking (parent).
  • chunking-form-grouping — chunking at the form-section level.
  • legibility (perception) — tabular numerals for column alignment.
  • accessibility-perceivable (process) — number formatting affects screen-reader pronunciation.

© hashgraph-online, 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 1 other file (references) in plugins/HDeibler/universal-design-principles/plugins/cognition-and-learnability-principles/skills/chunking-numeric-and-otp of hashgraph-online/awesome-codex-plugins.

  • SKILL.md
  • references/numeric-format-conventions.md

Open the folder on GitHubat commit 9e7b281

Compare with similar skills

Chunking Numeric And Otp 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.

Chunking Numeric And Otp compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Chunking Numeric And Otp this skillhashgraph-online/awesome-codex-plugins1.3k—~1.8kAutomated safety check: PassApache-2.0
Design Systemaffaan-m/ECC276k—~698Automated safety check: PassMIT
Design Guidepaperclipai/paperclip99k1 repos~3.1kAutomated safety check: PassMIT
Design Audit Against Rams' Principlesthedotmack/claude-mem99k—~4.6kAutomated safety check: PassApache-2.0
Figma Design to Codewarpdotdev/warp65k4 repos~2.9kAutomated safety check: PassAGPL-3.0
Design Consultationgarrytan/gstack136k—~15kAutomated safety check: NotesMIT

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Questions about Chunking Numeric And Otp

What does Chunking Numeric And Otp do?

A skill your agent uses when designing inputs or displays for numeric strings — phone numbers, OTP / verification codes, credit card numbers, account IDs, license keys, currency, dates, social…. Chunking Numeric And Otp is an agent skill from hashgraph-online/awesome-codex-plugins. Use this skill when designing inputs or displays for numeric strings — phone numbers, OTP / verification codes, credit card numbers, account IDs, license keys, currency, dates, social security numbers.

When should I use Chunking Numeric And Otp?

Chunking Numeric And Otp fits situations like: designing inputs; displays for numeric strings — phone numbers; OTP / verification codes; credit card numbers.

How do I install Chunking Numeric And Otp in Claude Code?

Run `npx skills add hashgraph-online/awesome-codex-plugins --skill chunking-numeric-and-otp -a claude-code`. Or copy the skill folder (plugins/HDeibler/universal-design-principles/plugins/cognition-and-learnability-principles/skills/chunking-numeric-and-otp in hashgraph-online/awesome-codex-plugins) into .claude/skills/chunking-numeric-and-otp in your project. Claude Code loads it when a task matches its description.

How do I install Chunking Numeric And Otp in Codex?

Run `npx skills add hashgraph-online/awesome-codex-plugins --skill chunking-numeric-and-otp -a codex`. Or copy the skill folder (plugins/HDeibler/universal-design-principles/plugins/cognition-and-learnability-principles/skills/chunking-numeric-and-otp in hashgraph-online/awesome-codex-plugins) into .agents/skills/chunking-numeric-and-otp in your project. Codex loads it when a task matches its description.

Can I use Chunking Numeric And Otp 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 hashgraph-online/awesome-codex-plugins --skill chunking-numeric-and-otp -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/chunking-numeric-and-otp, .gemini/skills/chunking-numeric-and-otp, .github/skills/chunking-numeric-and-otp and .opencode/skills/chunking-numeric-and-otp in your project.

What does Chunking Numeric And Otp need to run?

SKILL.md names no scripts, command-line tools or credentials: Chunking Numeric And Otp is instructions for the agent only.

Does Chunking Numeric And Otp access the network?

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

Is Chunking Numeric And Otp 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 Chunking Numeric And Otp use?

Chunking Numeric And Otp 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 Chunking Numeric And Otp use?

About 1.8k tokens (SKILL.md is roughly 7.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 818 tokens, read only when the agent opens those files.

What are the alternatives to Chunking Numeric And Otp?

Skills that share tags, products or a category with Chunking Numeric And Otp: Design System (affaan-m/ECC, 276k stars), Design Guide (paperclipai/paperclip, 99k stars), Design Audit Against Rams' Principles (thedotmack/claude-mem, 99k stars) and Figma Design to Code (warpdotdev/warp, 65k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Chunking Numeric And Otp?

hashgraph-online (a GitHub organization) maintains it in hashgraph-online/awesome-codex-plugins, which has 1,255 GitHub stars. The repository holds 714 skills in this directory. The repository was last updated on October 9, 2026.

Source: hashgraph-online/awesome-codex-plugins on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.