undo

undo is a skill for Claude Code from hereinthehive/kickstart. It costs 43 tokens per session (1,077 once invoked), scanned B, original, no licence file.

A skill for reversing the assistant's most recent action with Git, a tool for tracking code changes. It can use a stash or a soft reset, which keeps the changes available for review.

In plain words
What is it for?
Undoing the last assistant action with /undo, "undo that", or "take that back".
Why use it?
It provides a way to take back an unwanted change while avoiding hard resets, pushed history, and merge conflicts.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Good fit Undoing the last assistant action with /undo, "undo that", or "take that back".

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/hereinthehive/kickstart/undo
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 hereinthehive/kickstart --skill undo
Clone the repo
git clone --depth 1 https://github.com/hereinthehive/kickstart

Made for: Claude Code.

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 undo

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/hereinthehive/kickstart/undo"><img src="https://agentmods.dev/badge/skills/hereinthehive/kickstart/undo.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 43 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,077 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown 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 $0.00043 $0.01077
Opus 5.5 $0.00017 $0.00431
Sonnet 5.5 $0.00009 $0.00215
Haiku 4.5 $0.00004 $0.00108

Measured 1mo ago against content hash a6feef0d8b71, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

undo scanned grade B with 1 finding 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 1mo 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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

git log --since="@$(cat .claude/.session-start)" --pretty=format:'%h %s'
.claude/skill-templates/undo/SKILL.md · 135 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 1mo ago First seen · 135 lines · 43 tokens per session scan B a6feef0d8b71

Subscribe to this mod's changes

undo is a skill published in the GitHub repository hereinthehive/kickstart (4 stars, last pushed 4mo ago), with no licence file. It adds 43 tokens to every session and 1,077 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Related

Other skills, from other repositories

watch-pr

Watch an Elixir/Phoenix PR for new review comments (bot + human) and CI results via a background watcher that wakes Claude only on real events. Use after opening a PR or pushing, while waiting on CI or reviewers.

oliver-kriska/claude-elixir-phoenix · 50 tokens

release

CONTRIBUTOR TOOL - Cut a plugin release: bump plugin.json version, finalize CHANGELOG, update README if needed, gate on make ci, commit, tag vX.Y.Z, and create the GitHub release. Use when shipping a new plugin version. NOT distributed.

oliver-kriska/claude-elixir-phoenix · 60 tokens

catchup

Summarize and review what changed while you were away. Use after a weekend, vacation, or flight to check missed PRs, git commits, Linear tickets, and meetings — one prioritized brief, not a firehose.

oliver-kriska/claude-elixir-phoenix · 48 tokens

pr-review

Address feedback left on a GitHub pull request: fetch unresolved review threads, make agreed Elixir/Phoenix code fixes, reply, and resolve. Use for a PR URL/number or reviewer comments. NOT for pre-PR review, findings triage, or CI monitoring.

oliver-kriska/claude-elixir-phoenix · 59 tokens

phx-pr-review

Address feedback left on a GitHub pull request: fetch unresolved review threads, make agreed Elixir/Phoenix code fixes, reply, and resolve. Use for a PR URL/number or reviewer comments. NOT for pre-PR review, findings triage, or CI monitoring.

oliver-kriska/claude-elixir-phoenix · 61 tokens

056-design-avoid-breaking-changes

Use when you need to review a plan, OpenSpec change, specification, or implementation proposal for breaking-change risk across commands, skills, generated outputs, XML sources, README/docs, tests, CI, APIs, schemas, configuration, data, migration, and release guidance. This should trigger for requests such as Review…

jabrena/plinth · 106 tokens