What is sindresorhus-log-update?

A Node.js library for updating terminal output in place instead of printing a new line each time.

Use it for progress bars, animated terminal output, and other live status displays; its persistent output method keeps selected messages in the scrollback.

It keeps progress displays and animations compact, so repeated status updates do not fill the terminal with old messages.

sindresorhus-log-update — Skill for Claude Code and Codex by skilld-dev: A Node.js library for updating terminal output in place…

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.

agentmods

npx agentmods add skills/skilld-dev/skilld/sindresorhus-log-update

Any agent

npx skills add skilld-dev/skilld --skill sindresorhus-log-update

Clone the repo

git clone --depth 1 https://github.com/skilld-dev/skilld

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/skilld-dev/skilld/sindresorhus-log-update.svg)](https://agentmods.dev/skills/skilld-dev/skilld/sindresorhus-log-update)

Your own site

<a href="https://agentmods.dev/skills/skilld-dev/skilld/sindresorhus-log-update"><img src="https://agentmods.dev/badge/skills/skilld-dev/skilld/sindresorhus-log-update.svg" alt="Measured on agentmods" height="20"></a>

Per session 54 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,164 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. Scan, not verified.

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	$0.00054	$0.01164
Opus 5	$0.00027	$0.00582
Sonnet 5	$0.00011	$0.00233
Haiku 4.5	$0.00005	$0.00116

Measured 3d ago against content hash 9d268cde3c2c, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

sindresorhus-log-update 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 3d 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.

.claude/skills/sindresorhus-log-update/SKILL.md · 63 lines

How it starts

The opening of the file, as written. The whole thing — 63 lines — stays where its author put it; the contents beside it link to each section on GitHub.

sindresorhus/log-update `log-update`

Log by overwriting the previous output in the terminal. Useful for rendering progress bars, animations, etc.

Version: 7.2.0 Deps: ansi-escapes@^7.3.0, cli-cursor@^5.0.0, slice-ansi@^8.0.0, strip-ansi@^7.2.0, wrap-ansi@^10.0.0 Tags: latest: 7.2.0

References: package.json — exports, entry points • GitHub Issues — bugs, workarounds, edge cases • Releases — changelog, breaking changes, new APIs

Search

Use skilld search "query" -p log-update instead of grepping .skilld/ directories. Run skilld search --guide -p log-update for full syntax, filters, and operators.

API Changes

This section documents version-specific API changes — prioritize recent major/minor releases.

BREAKING: Node.js requirement updated from 18 to 20 in v7.0.0 — code targeting earlier Node.js versions will fail at runtime source
NEW: persist(...text) method added in v7.0.0 — writes output that persists in terminal scrollback, unlike the main logUpdate() which updates in place source
NEW: defaultWidth option added in v7.0.0 — allows specifying terminal width (default: 80) when the stream doesn't provide columns property, useful for piped or redirected output source
NEW: defaultHeight option added in v7.0.0 — allows specifying terminal height (default: 24) when the stream doesn't provide rows property, useful for piped or redirected output source

Also changed: Partial update rendering optimization v7.0.0 · Trailing newline handling fixes v7.0.1–v7.0.2

Best Practices

Use .persist() for permanent terminal output that should remain in scrollback history — it writes like console.log() instead of updating in-place, ideal for results or status messages that users need to scroll back to review source

Read the full file on GitHub · 63 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.

3d ago First seen · 63 lines · 54 tokens per session scan A 9d268cde3c2c

Subscribe to this mod's changes

sindresorhus-log-update is a skill published in the GitHub repository skilld-dev/skilld (306 stars, last pushed 7d ago), licensed MIT. It adds 54 tokens to every session and 1,164 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 2026-08-30.

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