Measure Twice
by Aman Garg
Cuts the back-and-forth in half. 12 rules that stop your AI from rushing, guessing, and making you repeat yourself.
- Prevent the AI from making the same incorrect fix multiple times
- Ensure exact user-provided constants and formulas are used verbatim
- Force a file-read before any write operation to protect existing code
$5
One-time purchase · Own forever
Included in download
- Prevent the AI from making the same incorrect fix multiple times
- Ensure exact user-provided constants and formulas are used verbatim
- Ready for Works with Claude Code
- Includes example output and usage patterns
See it in action
Reading session_auth.py... Target: "Use the formula from row 12" Current: Using hardcoded secret. Delta: I will import the SecretManager and replace line 45 with the dynamic lookup. Verification: I checked row 12 in the config; the key name matches. Syntax check passed.
Measure Twice
by Aman Garg
Cuts the back-and-forth in half. 12 rules that stop your AI from rushing, guessing, and making you repeat yourself.
$5
One-time purchase · Own forever
⚡ Also available via Agensi MCP — your AI agent can load this skill on demand via MCP. Learn more →
Included in download
- Prevent the AI from making the same incorrect fix multiple times
- Ensure exact user-provided constants and formulas are used verbatim
- Ready for Works with Claude Code
- Includes example output and usage patterns
- Instant install
See it in action
Reading session_auth.py... Target: "Use the formula from row 12" Current: Using hardcoded secret. Delta: I will import the SecretManager and replace line 45 with the dynamic lookup. Verification: I checked row 12 in the config; the key name matches. Syntax check passed.
About This Skill
If you've ever had your AI say "fixed!" only to find it broke something else, or watched it try the same failed approach four times in a row, this skill exists because of those moments. Measure Twice is a set of 12 rules, each one written after a specific real mistake. It changes how your agent approaches every task: read the file before editing it, quote the user's exact words instead of summarizing, check that a fix actually worked before moving on. What it prevents Jumping straight to code without reading the relevant files first. Paraphrasing your request and losing the specific detail that mattered. Claiming something is done without verifying it. Editing a file without reading its current contents. Trying the same broken fix with slightly different values. Putting changes in the wrong file or scope. Breaking nearby code while fixing something else. Forgetting what you originally asked after a few back and forths. How it actually works The agent follows a simple loop: quote your words exactly, read the current state, write one sentence about what needs to change ("Currently X, want Y, changing Z"), then implement. After the change, it re-reads the file and checks that it matches what you asked for instead of just assuming it worked. Every rule here came from a real session where something went wrong. Nothing theoretical.
📖 Learn more: Best Testing & QA Skills for Claude Code →
Use Cases
- Prevent the AI from making the same incorrect fix multiple times
- Ensure exact user-provided constants and formulas are used verbatim
- Force a file-read before any write operation to protect existing code
- Audit the 'blast radius' of changes to shared functions and styles
How to Install
unzip measure-twice.zip -d ~/.claude/skills/Reviews
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Permissions
No special permissions declared or detected
Works with Claude Code, Cursor, Codex CLI, VS Code Copilot, and any SKILL.md-compatible agent. No additional dependencies required.
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