Prompt Fixer
An open-source Claude Code and Antigravity plugin that cleans up rough prompts before the assistant acts, without ever silently rewriting intent.
- Client
- Prompt Fixer
- Industry
- Developer Tools & AI Tooling
- Service
- Custom Software Development
- 01
The brief
Reduce friction from rough prompts by cleaning them up before the assistant acts, without ever silently rewriting the user's intent.
- 02
The challenge
Hastily typed prompts, typos, vague one-word asks, filler openers, and broken templates lead to misunderstandings and wasted clarification rounds with AI assistants.
Users should not have to overthink their phrasing, yet assistants respond best to clear, actionable input.
- 03
Our approach
We built a plugin for Claude Code and Antigravity that detects rough prompts and improves them, fixing typos, clarifying vague requests, repairing template syntax, and stripping filler, while always showing the change.
The design is deliberately non-intrusive: it nudges and shows a before and after rather than silently rewriting or blocking anything the user typed.
- On-demand /fix-prompt command with before and after comparison
- Auto-detection hook that flags rough input
- Non-intrusive: never silently rewrites or blocks a prompt
- Customisable detection rules and fixing behaviour
Scope of work
- 01Claude Code and Antigravity plugin
- 02/fix-prompt command with before and after output
- 03Auto-detection hook (shell + jq)
- 04Configurable detection and fixing rules
Tech stack
- Shell
- jq
- Claude Code Plugin
- Claude Code
- Plugin
- Shell
The outcome
Prompt Fixer catches common prompt issues upfront, giving the assistant clearer, more actionable input and improving response quality without extra effort from the user.
It streamlines any workflow where quick, informal prompts are the norm, cutting the back-and-forth of clarification.
- Never
- Silent rewrites
- 2
- Platforms
- /fix-prompt
- Command