sm-barnacle

sm-barnacle is a command for Claude Code from ScienceIsNeato/slop-mop. It costs 0 tokens per session (277 once invoked), scanned A, original, Apache-2.0.

A command for reporting problems with the sm tool itself, such as invalid guidance, confusing output, or broken installation flows.

In plain words
What is it for?
It is for filing a structured issue describing what the tool did, what was expected, how to reproduce it, and what was already tried.
Why use it?
It separates failures in the workflow tool from failures in the project being worked on.

Command for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the slopmop plugin — 1 skill, 8 commands shipped together

Good fit It is for filing a structured issue describing what the tool did, what was expected, how to reproduce it, and what was already tried.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/scienceisneato/slop-mop/sm-barnacle
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/ScienceIsNeato/slop-mop

Made for: Claude Code.

Or install slopmop, the plugin that ships this one along with the rest of its 1 skill, 8 commands.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for sm-barnacle

README.md
[![agentmods](https://agentmods.dev/badge/commands/scienceisneato/slop-mop/sm-barnacle/github.svg)](https://agentmods.dev/commands/scienceisneato/slop-mop/sm-barnacle)
Your own site
<a href="https://agentmods.dev/commands/scienceisneato/slop-mop/sm-barnacle"><img src="https://agentmods.dev/badge/commands/scienceisneato/slop-mop/sm-barnacle/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for sm-barnacle

Your own site · 80×15
<a href="https://agentmods.dev/commands/scienceisneato/slop-mop/sm-barnacle"><img src="https://agentmods.dev/badge/commands/scienceisneato/slop-mop/sm-barnacle.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 277 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00000 $0.00277
Opus 5 $0.00000 $0.00138
Sonnet 5 $0.00000 $0.00055
Haiku 4.5 $0.00000 $0.00028

Measured 9d ago against content hash da0145960f32, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

sm-barnacle scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

commands/sm-barnacle.md · 31 lines

What it actually says

/sm-barnacle — report slop-mop tool friction

Use when sm itself gives invalid guidance, blocks valid work, produces confusing output, or breaks install/upgrade/refit flow. Do not use this for real target-repo failures; fix those through the normal rail.

sm barnacle file \
  --title "short summary of the slop-mop friction" \
  --command "sm <verb> [flags]" \
  --expected "what should have happened" \
  --actual "what happened instead" \
  --repro-step "how to reproduce it" \
  --tried "what you already tried" \
  --workflow swab \
  --blocker-type blocking \
  --json

Use --dry-run when GitHub auth is unavailable. The generated issue body is written to .slopmop/last_barnacle_issue.md; pass --body-file <path> when a specific retry artifact path matters.

The point is to improve the rail, not hide the defect. File the barnacle, then continue only if the friction is non-blocking.

Prerequisite: sm must be installed. If command not found, suggest:

pipx install slopmop[all]
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 9d ago First seen · 31 lines · 0 tokens per session scan A da0145960f32

Subscribe to this mod's changes

sm-barnacle is a command published in the GitHub repository ScienceIsNeato/slop-mop (6 stars, last pushed 19d ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 277 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.