Agent skill

Project V4 Rust

by firehol in firehol/iprange

Verify, benchmark, review, or change the Rust v4 database engine, its Rust-provided C ABI, and the shared v4 conformance corpus.

Custom licenceAuto-check passed

Install Project V4 Rust

skills CLI
$ npx skills add firehol/iprange --skill project-v4-rust -a claude-code

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

GitHub CLI
$ gh skill install firehol/iprange project-v4-rust --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/firehol/iprange.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/project-v4-rust .claude/skills/project-v4-rust && 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
project-v4-rust
GitHub stars
241
Token cost
~4.4k tokens
SKILL.md length
1,945 words
Files
2
Skills in repo
2
Repo updated
First seen
Licence
Custom licence

At a glance

Verify, benchmark, review, or change the Rust v4 database engine, its Rust-provided C ABI, and the shared v4 conformance corpus.

  • Works in 5 steps: Read the sole active SOW under… → Read… → Inspect git status --short. Preserve… → …
  • Work under v4/rust
  • SKILL.md covers Establish the boundary, Prove the compiled…, Run the Rust gates and Prove portable byte order, plus 3 more sections
  • Calls cargo and git

What it does

Project V4 Rust is an agent skill from firehol/iprange. Verify, benchmark, review, or change the Rust v4 database engine, its Rust-provided C ABI, and the shared v4 conformance corpus. Use for work under v4/rust or v4/conformance, Rust v4 portability and resource claims, generated ABI checks, or update-ipsets suitability evidence.

Its SKILL.md is about 4.4k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `agents/openai.yaml`).

It works with Rust.

When your agent uses it

  • Work under v4/rust
  • Rust v4 portability and resource claims
  • Generated ABI checks
  • Update-ipsets suitability evidence

Example prompts

  • “/project-v4-rust”

Workflow steps

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

  1. Read the sole active SOW under .agents/sow/current/.
  2. Read .agents/sow/specs/binary-format-v4.md and
  3. Inspect git status --short. Preserve unrelated changes and stage files
  4. Keep Phase 1 unsigned and exact. Do not restore v3, add signing, start Go,
  5. Keep validation explicit. Ordinary open and read paths must not perform a

What it can do on your machine

Read from SKILL.md and the folder at commit 26533e8. 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:

    • cargo
    • git

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md. Its commands use git, which can reach the network depending on how they are called.

    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 V4 Rust loads about 4.4k tokens when it runs. Until then it costs about 73 tokens; SKILL.md has 1,945 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~73
When it runs · the whole SKILL.md, loaded when a task matches
~4.4k

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

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 1,945 words (~4,366 tokens).

“Keep Rust v4 work inside the approved exact-v4 contract and prove claims with the compiled implementation. Do not infer current behavior from obsolete source files, historical SOW claims, or unapproved future work.”

— opening of SKILL.md by firehol, Custom licence
name
project-v4-rust

Read the full SKILL.md on GitHub

Files

SKILL.md and 1 other file in .agents/skills/project-v4-rust of firehol/iprange.

  • SKILL.md
  • agents/openai.yaml

Open the folder on GitHubat commit 26533e8

Compare with similar skills

Project V4 Rust 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.

Project V4 Rust compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Project V4 Rust this skillfirehol/iprange241—~4.4kAutomated safety check: PassCustom licence
Update V8 Versionopeninterpreter/openinterpreter69k2 repos~845Automated safety check: PassApache-2.0
Firecrawl Page Scrape Integrationfirecrawl/firecrawl190k1 repos~944Automated safety check: PassISC
Migrate Core Code to Submodulestinyhumansai/openhuman42k—~2.6kAutomated safety check: PassGPL-3.0
Rust TDD Workflowrtk-ai/rtk83k—~753Automated safety check: NotesApache-2.0
Rust Best Practicesfarm-fe/farm5.6k3 repos~1.1kAutomated safety check: PassMIT

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Works with

Questions about Project V4 Rust

What does Project V4 Rust do?

Verify, benchmark, review, or change the Rust v4 database engine, its Rust-provided C ABI, and the shared v4 conformance corpus. Project V4 Rust is an agent skill from firehol/iprange. Verify, benchmark, review, or change the Rust v4 database engine, its Rust-provided C ABI, and the shared v4 conformance corpus.

When should I use Project V4 Rust?

Project V4 Rust fits situations like: work under v4/rust; rust v4 portability and resource claims; generated ABI checks; update-ipsets suitability evidence.

How do I install Project V4 Rust in Claude Code?

Run `npx skills add firehol/iprange --skill project-v4-rust -a claude-code`. Or copy the skill folder (.agents/skills/project-v4-rust in firehol/iprange) into .claude/skills/project-v4-rust in your project. Claude Code loads it when a task matches its description.

How do I install Project V4 Rust in Codex?

Run `npx skills add firehol/iprange --skill project-v4-rust -a codex`. Or copy the skill folder (.agents/skills/project-v4-rust in firehol/iprange) into .agents/skills/project-v4-rust in your project. Codex loads it when a task matches its description.

Can I use Project V4 Rust 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 firehol/iprange --skill project-v4-rust -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-v4-rust, .gemini/skills/project-v4-rust, .github/skills/project-v4-rust and .opencode/skills/project-v4-rust in your project.

What does Project V4 Rust need to run?

Going by SKILL.md and its folder, Project V4 Rust needs the command-line tools its instructions call (cargo and git).

Does Project V4 Rust access the network?

SKILL.md contains no URLs. Its commands use git, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Project V4 Rust 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 Project V4 Rust use?

Project V4 Rust has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Project V4 Rust use?

About 4.4k tokens (SKILL.md is roughly 17k 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 V4 Rust?

Skills that share tags, products or a category with Project V4 Rust: Update V8 Version (openinterpreter/openinterpreter, 69k stars), Firecrawl Page Scrape Integration (firecrawl/firecrawl, 190k stars), Migrate Core Code to Submodules (tinyhumansai/openhuman, 42k stars) and Rust TDD Workflow (rtk-ai/rtk, 83k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Project V4 Rust?

firehol (a GitHub organization) maintains it in firehol/iprange, which has 241 GitHub stars. The repository holds 2 skills in this directory. The repository was last updated on October 7, 2026.

Source: firehol/iprange on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.