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Agent skill

Smbutils

by SynchronetBBS in SynchronetBBS/sbbs

A skill your agent uses when inspecting, validating, repairing, importing into, or maintaining a Synchronet Message Base (SMB) file — mail (mail.shd), message sub-boards (data/subs/<code.shd), or…

Custom licenceAuto-check passed

Install Smbutils

skills CLI
$ npx skills add SynchronetBBS/sbbs --skill smbutils -a claude-code

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

GitHub CLI
$ gh skill install SynchronetBBS/sbbs smbutils --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/SynchronetBBS/sbbs.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/smbutils .claude/skills/smbutils && 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
smbutils
GitHub stars
111
Token cost
~5.1k tokens
SKILL.md length
2,354 words
Files
1
Skills in repo
8
Repo updated
First seen
Licence
Custom licence

At a glance

A skill your agent uses when inspecting, validating, repairing, importing into, or maintaining a Synchronet Message Base (SMB) file — mail (mail.shd), message sub-boards (data/subs/<code.shd), or…

  • Works in 7 steps: Identify which base, from logs or the… → Back up the full file set → Run chksmb -e to see exactly what's… → …
  • Maintaining a Synchronet Message Base (SMB) file — mail (mail.shd)
  • SKILL.md covers Locating the install, SMB format reference, Filespec convention (all three… and Invocation form, plus 12 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Smbutils is an agent skill from SynchronetBBS/sbbs. Use when inspecting, validating, repairing, importing into, or maintaining a Synchronet Message Base (SMB) file — mail (mail.shd), message sub-boards (data/subs/<code.shd), or file bases (data/file/<code.shd) — via the smbutil, chksmb, or fixsmb command-line tools. Trigger whenever the user mentions smbutil, chksmb, fixsmb, SMB files, .shd / .sdt / .sid / .sha files, "the mail base", "rebuild/renumber the message base", "pack the sub", "check the message base for corruption", "repair an SMB", "dump a hash file"…

Its SKILL.md is about 5.1k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

The repository describes itself as: Mirror of gitlab.synchro.net/sbbs (don't submit pull requests here).

When your agent uses it

  • Maintaining a Synchronet Message Base (SMB) file — mail (mail.shd)
  • Message sub-boards (data/subs/<code.shd)
  • File bases (data/file/<code.shd) — via the smbutil
  • Fixsmb command-line tools

Example prompts

  • “the mail base”
  • “rebuild/renumber the message base”
  • “pack the sub”
  • “/smbutils”

Workflow steps

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

  1. Identify which base, from logs or the user's report.
  2. Back up the full file set
  3. Run chksmb -e to see exactly what's broken.
  4. Pick the right fixsmb flag based on what chksmb reported
  5. Re-run chksmb to confirm clean.
  6. smbutil s to verify status totals look right.
  7. smbutil p if there's reclaimable space after repair.

What it can do on your machine

Read from SKILL.md and the folder at commit d83fbe2. 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 bash).

    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):

    • wiki.synchro.net
    • gitlab.synchro.net
    • synchro.net

    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

Smbutils loads about 5.1k tokens when it runs. Until then it costs about 191 tokens; SKILL.md has 2,354 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~191
When it runs · the whole SKILL.md, loaded when a task matches
~5.1k

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 2,354 words (~5,065 tokens).

“Three command-line tools work on Synchronet Message Base (SMB) files. They overlap in scope but each has a specific job:”

— opening of SKILL.md by SynchronetBBS, Custom licence
name
smbutils

Read the full SKILL.md on GitHub

Files

Just SKILL.md in .claude/skills/smbutils of SynchronetBBS/sbbs.

Open the folder on GitHubat commit d83fbe2

Compare with similar skills

Smbutils 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.

Smbutils compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Smbutils this skillSynchronetBBS/sbbs111—~5.1kAutomated safety check: PassCustom licence
Nemoclaw Maintainer Validate LaunchableNVIDIA/NemoClaw23k—~3.1kAutomated safety check: PassApache-2.0
Importasgeirtj/system_prompts_leaks69k—~3.5kAutomated safety check: PassCC0-1.0
Openclaw Ghsa Maintaineropenclaw/openclaw392k—~741Automated safety check: PassMIT
Openclaw PR Maintaineropenclaw/openclaw392k—~2.2kAutomated safety check: PassMIT
Form Validationthedaviddias/Front-End-Checklist74k—~633Automated safety check: PassMIT

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  • Nemoclaw Maintainer Validate Launchable

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  • Menus

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Questions about Smbutils

What does Smbutils do?

A skill your agent uses when inspecting, validating, repairing, importing into, or maintaining a Synchronet Message Base (SMB) file — mail (mail.shd), message sub-boards (data/subs/<code.shd), or…. Smbutils is an agent skill from SynchronetBBS/sbbs.shd) — via the smbutil, chksmb, or fixsmb command-line tools.

When should I use Smbutils?

Smbutils fits situations like: maintaining a Synchronet Message Base (SMB) file — mail (mail.shd); message sub-boards (data/subs/<code.shd); file bases (data/file/<code.shd) — via the smbutil; fixsmb command-line tools.

How do I install Smbutils in Claude Code?

Run `npx skills add SynchronetBBS/sbbs --skill smbutils -a claude-code`. Or copy the skill folder (.claude/skills/smbutils in SynchronetBBS/sbbs) into .claude/skills/smbutils in your project. Claude Code loads it when a task matches its description.

How do I install Smbutils in Codex?

Run `npx skills add SynchronetBBS/sbbs --skill smbutils -a codex`. Or copy the skill folder (.claude/skills/smbutils in SynchronetBBS/sbbs) into .agents/skills/smbutils in your project. Codex loads it when a task matches its description.

Can I use Smbutils 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 SynchronetBBS/sbbs --skill smbutils -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/smbutils, .gemini/skills/smbutils, .github/skills/smbutils and .opencode/skills/smbutils in your project.

What does Smbutils need to run?

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

Does Smbutils access the network?

SKILL.md names 3 domains. As links in the text: wiki.synchro.net, gitlab.synchro.net and synchro.net. This is read from the text; nothing was executed.

Is Smbutils 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 Smbutils use?

Smbutils 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 Smbutils use?

About 5.1k tokens (SKILL.md is roughly 20k 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 Smbutils?

Skills that share tags, products or a category with Smbutils: Nemoclaw Maintainer Validate Launchable (NVIDIA/NemoClaw, 23k stars), Import (asgeirtj/system_prompts_leaks, 69k stars), Openclaw Ghsa Maintainer (openclaw/openclaw, 392k stars) and Openclaw PR Maintainer (openclaw/openclaw, 392k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Smbutils?

SynchronetBBS (a GitHub organization) maintains it in SynchronetBBS/sbbs, which has 111 GitHub stars. The repository holds 8 skills in this directory. The repository was last updated on October 6, 2026.

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