A tool for renaming cmux tabs and workspaces, which are terminal interface areas, based on the work currently running in them.

Use it to rename the current tab or workspace, the focused tab or workspace, or both.

It replaces vague or stale labels such as “bash” or “node” with names that help you find the right work area.

auto-rename — Skill for Claude Code by jtsternberg

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 jtsternberg/claude-plugins --skill auto-rename

Clone the repo

git clone --depth 1 https://github.com/jtsternberg/claude-plugins

Made for: Claude Code.

Or install cmux-cli, the plugin that ships this one along with the rest of its 3 skills.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/jtsternberg/claude-plugins/auto-rename/github.svg)](https://agentmods.dev/skills/jtsternberg/claude-plugins/auto-rename)

Your own site

<a href="https://agentmods.dev/skills/jtsternberg/claude-plugins/auto-rename"><img src="https://agentmods.dev/badge/skills/jtsternberg/claude-plugins/auto-rename/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/jtsternberg/claude-plugins/auto-rename"><img src="https://agentmods.dev/badge/skills/jtsternberg/claude-plugins/auto-rename.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 52 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,311 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.

Model	Per session	Once invoked
Fable 5.1	$0.00052	$0.02311
Opus 5	$0.00026	$0.01156
Sonnet 5	$0.00010	$0.00462
Haiku 4.5	$0.00005	$0.00231

Measured 9d ago against content hash 33d9e08e30c0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

auto-rename 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.

plugins/cmux-cli/skills/auto-rename/SKILL.md · 129 lines

How it starts

The opening of the file, as written. The whole thing — 129 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Auto-rename cmux tabs & workspaces

Summarize what a cmux tab (surface) or workspace is actually doing, generate a concise helpful name, and apply it with cmux rename-tab / cmux rename-workspace.

REQUIRED BACKGROUND: the companion using-cmux-cli skill covers handle formats, identify, tree, read-screen, and its gotchas (especially the Claude Code ghost-autosuggest trap). This skill assumes that vocabulary.

Current context (resolved at skill load)

cmux identify --json --id-format both 2>/dev/null || echo '{"error":"cmux identify failed — outside cmux or socket unreachable"}'

--id-format both gives each entry its stable UUID (*_id) alongside its positional *_ref. Target by the UUID.

caller.* — where this agent runs. Default target for "rename this tab/workspace".
focused.* — where the user is looking. Target this when they say "the tab I'm looking at".

Step 1 — Resolve the target(s)

User says	Target
"rename this tab" / "auto-name my tab"	`caller.tab_id` (UUID)
"rename this workspace"	`caller.workspace_id` (UUID)
"rename both" / bare "auto-rename"	caller tab and caller workspace
"the tab/workspace I'm looking at"	`focused.*`
"the tab running the build" / a named workspace	find it: `cmux tree --all --json` + `jq`, or the using-cmux-cli `find-surface.sh` helper
"rename everything here" / "all tabs in this workspace" / "fix all the tab names" / bare "all"	scoped batch — every tab under `caller.workspace_id`, plus the workspace itself (see Batch mode)

Scope is always the current workspace, never all of them. There is deliberately no "rename every workspace" mode — a mass rename across many workspaces is disruptive and unwanted. "all" means "everything in this workspace."

Gotcha (verified): cmux tree --workspace <ref> --json ignores the workspace filter and returns the whole tree — grabbing the first surface from it targets the wrong workspace and rename-tab fails with not_found: Tab not found. Either use the plain-text cmux tree --workspace <ref> (which is scoped) or filter the JSON yourself by UUID: cmux tree --all --json --id-format both | jq --arg w "<ws-uuid>" '.. | objects | select(.id==$w)'.

Read the full file on GitHub · 129 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.

9d ago First seen · 129 lines · 52 tokens per session scan A 33d9e08e30c0

Subscribe to this mod's changes

auto-rename is a skill published in the GitHub repository jtsternberg/claude-plugins (5 stars, last pushed 5d ago), licensed MIT. It adds 52 tokens to every session and 2,311 once invoked, about $0.0003 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 2026-08-31.

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