mulmoterminal-header

mulmoterminal-header is a skill for Claude Code, Codex from receptron/mulmoterminal. It costs 200 tokens per session (3,130 once invoked), scanned A, original, MIT.

A way to add custom buttons and information labels to a MulmoTerminal session header, the bar at the top of an agent workspace.

In plain words
What is it for?
It configures global or project-specific buttons that run commands, enter text into the agent, or open links, plus chips that display information.
Why use it?
It makes common project actions and useful status information available in the session header, even though there is no settings screen for them.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions Codex.

Good fit It configures global or project-specific buttons that run commands, enter text into the agent, or open links, plus chips that display information.

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Install with agentmods
npx agentmods add skills/receptron/mulmoterminal/mulmoterminal-header
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.

Any agent
npx skills add receptron/mulmoterminal --skill mulmoterminal-header
Clone the repo
git clone --depth 1 https://github.com/receptron/mulmoterminal

Made for: Claude Code, Codex.

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 mulmoterminal-header

README.md
[![agentmods](https://agentmods.dev/badge/skills/receptron/mulmoterminal/mulmoterminal-header/github.svg)](https://agentmods.dev/skills/receptron/mulmoterminal/mulmoterminal-header)
Your own site
<a href="https://agentmods.dev/skills/receptron/mulmoterminal/mulmoterminal-header"><img src="https://agentmods.dev/badge/skills/receptron/mulmoterminal/mulmoterminal-header/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 mulmoterminal-header

Your own site · 80×15
<a href="https://agentmods.dev/skills/receptron/mulmoterminal/mulmoterminal-header"><img src="https://agentmods.dev/badge/skills/receptron/mulmoterminal/mulmoterminal-header.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 200 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,130 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. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Excessive Agency · line 160
    Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.
    Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
How audits are shown
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 $0.00200 $0.03130
Opus 5 $0.00100 $0.01565
Sonnet 5 $0.00040 $0.00626
Haiku 4.5 $0.00020 $0.00313

Measured 12d ago against content hash 55f07b116e6b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

mulmoterminal-header 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 12d 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.

server/skills/mulmoterminal-header/SKILL.md · 238 lines

How it starts

The opening of the file, as written. The whole thing — 238 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Header buttons and chips

A session header carries buttons (things you can do) and chips (things you can read). Both are configured in two places and merged, and the two merge by different rules — that asymmetry is the thing to get right, and it has no UI anywhere.

Where to write it

File Applies to Settings UI
~/.mulmoterminal/config.jsonbuttons / chips every directory none
<project>/.mulmoterminal.jsonbuttons / chips that project none

Ask which the user means. "A button for yarn build" is usually per-project (the command only exists there); "show me the branch everywhere" is global.

Global writes are a partial POST /api/config merge — send only buttons / chips. Per-project writes go through your Write/Edit tool, and writing the file is itself the live-reload signal; there is no filesystem watcher.

"Partial" is per TOP-LEVEL key, and buttons / chips are each replaced WHOLE. The merge is body[key] !== undefined ? sanitize(body[key]) : current (server/config/app-config.ts), so posting

{ "buttons": [{ "id": "build", "icon": "build", "label": "Build", "run": "shell", "cmd": "yarn build" }] }

does not add a button — it makes that the entire global set, deleting every other button the user had. Nothing warns, and the reply is a success.

So a global write always sends the complete array: read the current one first, add or change your entry in memory, and post the whole thing. Every example below shows the entries under discussion on their own for readability — none of them is a body to post as-is unless the user genuinely has no others.

Three different "replace" rules live here and are easy to run together:

writing buttons to the global config replaces the whole global array — the one this section is about
listing buttons at any level replaces DEFAULT_BUTTONS; the built-ins are not merged in
project vs global merged, keyed by id — a project adds or overrides without restating

Read the full file on GitHub · 238 lines

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. 12d ago First seen · 238 lines · 200 tokens per session scan A 55f07b116e6b

Subscribe to this mod's changes

mulmoterminal-header is a skill published in the GitHub repository receptron/mulmoterminal (212 stars, last pushed today), licensed MIT. It adds 200 tokens to every session and 3,130 once invoked, about $0.0010 per session on Opus 5. 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 2026-08-30.