Agent skill

Corvus Numeric Types

by corvus-dotnet in corvus-dotnet/Corvus.JsonSchema

Understand and work with the Corvus.Text.Json numeric type system including parsed components, BigNumber arbitrary-precision decimal, format-based type selection, and precision-preserving validation.

Apache-2.0Auto-check passed

Install Corvus Numeric Types

skills CLI

$ npx skills add corvus-dotnet/Corvus.JsonSchema --skill corvus-numeric-types -a claude-code

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

GitHub CLI

$ gh skill install corvus-dotnet/Corvus.JsonSchema corvus-numeric-types --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/corvus-dotnet/Corvus.JsonSchema.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.github/skills/corvus-numeric-types .claude/skills/corvus-numeric-types && 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 "corvus-numeric-types" agent skill from https://github.com/corvus-dotnet/Corvus.JsonSchema/tree/main/.github/skills/corvus-numeric-types into .claude/skills/corvus-numeric-types/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "corvus-numeric-types", 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/corvus-dotnet/Corvus.JsonSchema/tree/main/.github/skills/corvus-numeric-types

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 corvus-dotnet/Corvus.JsonSchema --skill corvus-numeric-types -a codex

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

GitHub CLI

$ gh skill install corvus-dotnet/Corvus.JsonSchema corvus-numeric-types --agent codex

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

Manual copy

$ git clone --depth 1 https://github.com/corvus-dotnet/Corvus.JsonSchema.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.github/skills/corvus-numeric-types .agents/skills/corvus-numeric-types && 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 "corvus-numeric-types" agent skill from https://github.com/corvus-dotnet/Corvus.JsonSchema/tree/main/.github/skills/corvus-numeric-types into .agents/skills/corvus-numeric-types/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "corvus-numeric-types", 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 corvus-dotnet/Corvus.JsonSchema --skill corvus-numeric-types -a cursor

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

GitHub CLI

$ gh skill install corvus-dotnet/Corvus.JsonSchema corvus-numeric-types --agent cursor

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

Manual copy

$ git clone --depth 1 https://github.com/corvus-dotnet/Corvus.JsonSchema.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.github/skills/corvus-numeric-types .cursor/skills/corvus-numeric-types && 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 "corvus-numeric-types" agent skill from https://github.com/corvus-dotnet/Corvus.JsonSchema/tree/main/.github/skills/corvus-numeric-types into .cursor/skills/corvus-numeric-types/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "corvus-numeric-types", 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/corvus-dotnet/Corvus.JsonSchema.git --path .github/skills/corvus-numeric-types

--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 corvus-dotnet/Corvus.JsonSchema --skill corvus-numeric-types -a gemini-cli

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

GitHub CLI

$ gh skill install corvus-dotnet/Corvus.JsonSchema corvus-numeric-types --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/corvus-dotnet/Corvus.JsonSchema.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.github/skills/corvus-numeric-types .gemini/skills/corvus-numeric-types && 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 "corvus-numeric-types" agent skill from https://github.com/corvus-dotnet/Corvus.JsonSchema/tree/main/.github/skills/corvus-numeric-types into .gemini/skills/corvus-numeric-types/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "corvus-numeric-types", 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 corvus-dotnet/Corvus.JsonSchema corvus-numeric-types

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 corvus-dotnet/Corvus.JsonSchema --skill corvus-numeric-types -a github-copilot

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

Manual copy

$ git clone --depth 1 https://github.com/corvus-dotnet/Corvus.JsonSchema.git skills-src && mkdir -p .github/skills && cp -r skills-src/.github/skills/corvus-numeric-types .github/skills/corvus-numeric-types && 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 "corvus-numeric-types" agent skill from https://github.com/corvus-dotnet/Corvus.JsonSchema/tree/main/.github/skills/corvus-numeric-types into .github/skills/corvus-numeric-types/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "corvus-numeric-types", 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 corvus-dotnet/Corvus.JsonSchema --skill corvus-numeric-types -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 corvus-dotnet/Corvus.JsonSchema corvus-numeric-types --agent opencode

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

Manual copy

$ git clone --depth 1 https://github.com/corvus-dotnet/Corvus.JsonSchema.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.github/skills/corvus-numeric-types .opencode/skills/corvus-numeric-types && 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 "corvus-numeric-types" agent skill from https://github.com/corvus-dotnet/Corvus.JsonSchema/tree/main/.github/skills/corvus-numeric-types into .opencode/skills/corvus-numeric-types/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "corvus-numeric-types", 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: corvus-numeric-types
GitHub stars: 199
Token cost: ~904 tokens
SKILL.md length: 311 words
Files: 1
Skills in repo: 26
Repo updated: Oct 8, 2026
First seen: Oct 7, 2026
Licence: Apache-2.0

At a glance

Understand and work with the Corvus.Text.Json numeric type system including parsed components, BigNumber arbitrary-precision decimal, format-based type selection, and precision-preserving validation.

: working with JSON numbers in Corvus types
SKILL.md covers Parsed Component Representation, BigNumber, Format-to-Type Mapping and Validation Optimizations, plus 4 more sections
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
Understanding format validation for numeric schemas

What it does

Corvus Numeric Types is an agent skill from corvus-dotnet/Corvus.JsonSchema. Understand and work with the Corvus.Text.Json numeric type system including parsed components, BigNumber arbitrary-precision decimal, format-based type selection, and precision-preserving validation. USE FOR: working with JSON numbers in Corvus types, understanding format validation for numeric schemas, implementing numeric operations, choosing between BigNumber and standard .NET numeric types. DO NOT USE FOR: general JSON parsing (use corvus-parsed-documents-and-memory).

Its SKILL.md is about 900 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It works with .NET. The repository describes itself as: Support for Json Schema validation and entity generation. The licence is Apache-2.0.

When your agent uses it

: working with JSON numbers in Corvus types
Understanding format validation for numeric schemas
Implementing numeric operations
Choosing between BigNumber and standard .NET numeric types

Example prompts

“/corvus-numeric-types”

What it can do on your machine

Read from SKILL.md and the folder at commit b9e3040. 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 csharp).
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

Corvus Numeric Types loads about 904 tokens when it runs. Until then it costs about 124 tokens; SKILL.md has 311 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~124
When it runs · the whole SKILL.md, loaded when a task matches: ~904

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 corvus-dotnet/Corvus.JsonSchema at commit b9e3040, republished under its Apache-2.0 licence (© corvus-dotnet). 311 words, ~904 tokens.

Download SKILL.mdSave it as .claude/skills/corvus-numeric-types/SKILL.md (or your agent's skills folder).

name: corvus-numeric-types
description: Understand and work with the Corvus.Text.Json numeric type system including parsed components, BigNumber arbitrary-precision decimal, format-based type selection, and precision-preserving validation. USE FOR: working with JSON numbers in Corvus types, understanding format validation for numeric schemas, implementing numeric operations, choosing between BigNumber and standard .NET numeric types. DO NOT USE FOR: general JSON parsing (use corvus-parsed-documents-and-memory).

Numeric Types

Parsed Component Representation

JSON numbers are stored as raw UTF-8 bytes and parsed on demand into four components:

(isNegative, integral, fractional, exponent)

Example: -123.456e+7 → (true, "123", "456", "+7")

All comparison and validation operates on ASCII digit components — no floating-point conversion. This preserves full precision and avoids IEEE 754 rounding.

BigNumber

An arbitrary-precision decimal: significand × 10^exponent where significand is BigInteger.

csharp

// From string
BigNumber bn = BigNumber.Parse("123456789012345678901234567890.123");

// From JSON element
BigNumber bn = element.GetBigNumber();

When to use BigNumber:

JSON values with > 28 significant digits (beyond decimal precision)
When exact precision matters (financial, scientific)
When you need DoS-safe parsing (input capped at 10,000 characters)

Supports all standard .NET format strings: G, F, N, E, C, P, R.

On .NET 9+, BigNumber implements INumber<BigNumber> for full generic math support.

Format-to-Type Mapping

The JSON Schema format keyword maps to .NET types:

Format	.NET Type	Notes
`int32`	`int`
`int64`	`long`
`int128`	`Int128`	.NET 7+ only, netstandard2.0 fallback
`uint32`	`uint`
`uint64`	`ulong`
`uint128`	`UInt128`	.NET 7+ only
`half`	`Half`	.NET 5+ only
`single`	`float`
`double`	`double`
`decimal`	`decimal`
`byte`	`byte`
`sbyte`	`sbyte`
`int16`	`short`
`uint16`	`ushort`

Int128, UInt128, and Half have netstandard2.0 fallbacks.

Validation Optimizations

multipleOf Fast Paths

Common divisors have optimized implementations:

Divisors 1, 2, 3, 4, 5, 6, 8, 10 use specialized integer arithmetic
Other divisors fall back to BigNumber division

Range Validation

minimum, maximum, exclusiveMinimum, exclusiveMaximum all operate on parsed components (no float conversion), preserving exact precision.

DoS Protection

Numeric input is capped at 10,000 characters (BigNumber.MaxInputLength in src/Corvus.Text.Json/Corvus/Numerics/BigNumber.cs) to prevent resource-exhaustion attacks with extremely large numbers.

Namespaces

Namespace	Contents
`Corvus.Numerics`	`BigNumber`, `BigInteger` support types
`Corvus.Text.Json`	JSON element numeric accessors

Common Pitfalls

Don't use decimal for arbitrary precision: decimal has 28-29 significant digits max. Use BigNumber for unbounded precision.
Don't convert to double for comparison: IEEE 754 rounds. Use parsed-component comparison.
netstandard2.0 limitations: Int128/UInt128/Half aren't available — fallbacks exist but with reduced functionality.

Cross-References

For parsing JSON documents, see corvus-parsed-documents-and-memory
For format validation in code generation, see corvus-keywords-and-validation
Full guide: docs/NumericTypes.md

Files

Just SKILL.md in .github/skills/corvus-numeric-types of corvus-dotnet/Corvus.JsonSchema.

Open the folder on GitHubat commit b9e3040

Compare with similar skills

Corvus Numeric Types 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.

Corvus Numeric Types compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Corvus Numeric Types this skillcorvus-dotnet/Corvus.JsonSchema	199	—	~904	Automated safety check: Pass	Apache-2.0	today
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Microsoft Skill CreatorMicrosoftDocs/mcp	1.9k	3 repos	~2.1k	Automated safety check: Pass	CC-BY-4.0	today
Speckit ConstitutionWeihanLi/WeihanLi.Common	242	11 repos	~2.1k	Automated safety check: Pass	Apache-2.0	24 days ago
Copilot Session Failure Analysisdotnet/maui	23k	—	~3.4k	Automated safety check: Pass	MIT	today
Microsoft Code ReferenceMicrosoftDocs/mcp	1.9k	4 repos	~1.1k	Automated safety check: Pass	CC-BY-4.0	today

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Works with

.NET

Questions about Corvus Numeric Types

What does Corvus Numeric Types do?

Understand and work with the Corvus.Text.Json numeric type system including parsed components, BigNumber arbitrary-precision decimal, format-based type selection, and precision-preserving validation. JsonSchema.Json numeric type system including parsed components, BigNumber arbitrary-precision decimal, format-based type selection, and precision-preserving validation.

When should I use Corvus Numeric Types?

Corvus Numeric Types fits situations like: : working with JSON numbers in Corvus types; understanding format validation for numeric schemas; implementing numeric operations; choosing between BigNumber and standard .NET numeric types.

How do I install Corvus Numeric Types in Claude Code?

Run `npx skills add corvus-dotnet/Corvus.JsonSchema --skill corvus-numeric-types -a claude-code`. Or copy the skill folder (.github/skills/corvus-numeric-types in corvus-dotnet/Corvus.JsonSchema) into .claude/skills/corvus-numeric-types in your project. Claude Code loads it when a task matches its description.

How do I install Corvus Numeric Types in Codex?

Run `npx skills add corvus-dotnet/Corvus.JsonSchema --skill corvus-numeric-types -a codex`. Or copy the skill folder (.github/skills/corvus-numeric-types in corvus-dotnet/Corvus.JsonSchema) into .agents/skills/corvus-numeric-types in your project. Codex loads it when a task matches its description.

Can I use Corvus Numeric Types 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 corvus-dotnet/Corvus.JsonSchema --skill corvus-numeric-types -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/corvus-numeric-types, .gemini/skills/corvus-numeric-types, .github/skills/corvus-numeric-types and .opencode/skills/corvus-numeric-types in your project.

What does Corvus Numeric Types need to run?

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

Does Corvus Numeric Types 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 Corvus Numeric Types 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 Corvus Numeric Types use?

Corvus Numeric Types 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 Corvus Numeric Types use?

About 904 tokens (SKILL.md is roughly 3.6k 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 Corvus Numeric Types?

Skills that share tags, products or a category with Corvus Numeric Types: Minimax DOCX (poco-ai/poco-claw, 1.4k stars), Microsoft Skill Creator (MicrosoftDocs/mcp, 1.9k stars), Speckit Constitution (WeihanLi/WeihanLi.Common, 242 stars) and Copilot Session Failure Analysis (dotnet/maui, 23k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Corvus Numeric Types?

corvus-dotnet (a GitHub organization) maintains it in corvus-dotnet/Corvus.JsonSchema, which has 199 GitHub stars. The repository holds 26 skills in this directory. The repository was last updated on October 8, 2026.

Source: corvus-dotnet/Corvus.JsonSchema on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Corvus Numeric Types

Facts

At a glance

What it does

When your agent uses it

Example prompts

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Numeric Types

Parsed Component Representation

BigNumber

Format-to-Type Mapping

Validation Optimizations

multipleOf Fast Paths

Range Validation

DoS Protection

Namespaces

Common Pitfalls

Cross-References

Files

Compare with similar skills

Similar skills

More from corvus-dotnet/Corvus.JsonSchema

Related

Questions about Corvus Numeric Types