checkpoint

checkpoint is a command for Claude Code from znlnzi/claude-config-studio. It costs 12 tokens per session (219 once invoked), scanned A, original, MIT.

A checkpoint manager that saves snapshots of a project's files, tests, coverage, and build status.

In plain words
What is it for?
Creating named snapshots, comparing the current project with one, listing saved checkpoints, and reviewing progress before a pull request.
Why use it?
It makes it easier to see what changed and whether project health improved or worsened during development.

Command for Claude Code

Written for Claude Code: installed under .claude/.

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 commands/znlnzi/claude-config-studio/checkpoint
Clone the repo
git clone --depth 1 https://github.com/znlnzi/claude-config-studio

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 checkpoint

README.md
[![agentmods](https://agentmods.dev/badge/commands/znlnzi/claude-config-studio/checkpoint.svg)](https://agentmods.dev/commands/znlnzi/claude-config-studio/checkpoint)
Your own site
<a href="https://agentmods.dev/commands/znlnzi/claude-config-studio/checkpoint"><img src="https://agentmods.dev/badge/commands/znlnzi/claude-config-studio/checkpoint.svg" alt="Measured on agentmods" height="20"></a>
Per session 12 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 219 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00012 $0.00219
Opus 5 $0.00006 $0.00110
Sonnet 5 $0.00002 $0.00044
Haiku 4.5 $0.00001 $0.00022

Measured 5d ago against content hash 93a844be36fa, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

checkpoint 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 5d 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/commands/checkpoint.md · 40 lines

What it actually says

/checkpoint - 检查点管理

创建工作快照,跟踪开发进度。

子命令

/checkpoint create [name]

创建一个命名检查点,记录当前状态:

  • 文件变更列表
  • 测试通过率
  • 代码覆盖率
  • 构建状态

/checkpoint verify [name]

将当前状态与指定检查点比较:

  • 新增/修改的文件
  • 测试结果变化
  • 覆盖率变化
  • 构建状态变化

/checkpoint list

显示所有已保存的检查点。

使用场景

典型开发周期:

  1. 开始工作前创建检查点
  2. 每个里程碑创建检查点
  3. 提交 PR 前对比检查点
  4. 回顾变更确保质量

检查点文件格式

检查点保存在 .claude/checkpoints/ 目录下。

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. 5d ago First seen · 40 lines · 12 tokens per session scan A 93a844be36fa

Subscribe to this mod's changes

checkpoint is a command published in the GitHub repository znlnzi/claude-config-studio (0 stars, last pushed 6mo ago), licensed MIT. It adds 12 tokens to every session and 219 once invoked, about $0.0001 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.