compiler for ai prompts

One prompt language. Every AI surface.

Stim lets you write commands, agents, and orchestration once, then compile clean instructions for Claude Code, ChatGPT, Cursor, and whatever comes next.

Star the project Download and try
stim workbench live target output
source reviewer.stim 
agent reviewer {
  description "Reviews PRs"
  tools [Read, Grep, Bash]
  model "sonnet"

  "Cite files and lines."
  "Rank findings by severity."
}
~/.claude/agents/reviewer.md 

              

            

            

              $ stim install reviewer.stim --target claude
              compiled
            

          

          

            parse
            .stim to AST
          

          

            ship
            agents, commands, rules
          

        

      

    


    

      

        

          parse
          resolve imports
          optimize
          compile
          install
          share packages
        

      


      

        

          

            
the language

            
Prompts stop being loose markdown.

            

              Stim gives prompt work the structure engineers expect: declarations, imports, variables, control flow,
              tasks, and target adapters. It compiles to prose, because the AI tool still reads instructions.
            

          

          

            

              command
              
Interactive slash-command workflows with questions, branches, loops, and subagent tasks.

            

            

              agent
              
Portable personas with metadata and stable prompt bodies.

            

            

              harness
              
Reusable orchestration templates for repeatable multi-agent patterns.

            

            

              package
              
Install shared command and agent kits from GitHub with one CLI call.

            

          

        

      


      

        

          

            
Raw prompts do not scale.

            Source files do.
          

          

            
01write .stim

            
02resolve files

            
03compile target

            
04install anywhere

          

        

      


      

        

          

            
try it now

            
A standalone binary. No runtime ceremony.

            

              Install Stim, write one agent, and compile it for multiple tools. The same source can become a Claude
              agent, a Cursor rule, or a ChatGPT instruction file.
            

            

              Download release
              Star on GitHub
            

          

          

            

              terminal
              
            

            
curl -fsSL https://raw.githubusercontent.com/wess/stim/main/install.sh | sh
stim version

cat > reviewer.stim <<'STIM'
agent reviewer {
  description "Reviews PRs for security and correctness"
  tools [Read, Grep, Bash]
  "Cite specific files and line numbers."
}
STIM

stim install reviewer.stim
stim compile reviewer.stim --target chatgpt

          

        

      


      

        

          
            Tutorial
            Build a real Stim workflow from first command to reusable orchestration.
          
          
            Syntax
            Every language feature documented from the parser outward.
          
          
            Examples
            Real commands, agents, teams, and harnesses to study.
          
        

      


      

        

          
open source

          
Star Stim if prompts deserve a compiler.

          

            Built with TypeScript and Bun. MIT licensed. Small enough to read, useful enough to put in your prompt
            workflow today.
          

          

            Star on GitHub
            Start the tutorial