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48 lines
1.5 KiB
Markdown
48 lines
1.5 KiB
Markdown
# TLA+ Specifications
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This directory contains TLA+ formal specifications for the GithubWorkflowTool project.
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## About TLA+
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TLA+ is a formal specification language developed by Leslie Lamport for designing, modeling, documenting, and verifying concurrent systems and algorithms. It's particularly useful for:
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- Modeling distributed systems and concurrent processes
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- Verifying correctness properties
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- Finding subtle bugs in system designs
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- Documenting system behavior formally
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## Purpose
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The TLA+ specifications in this directory formally model key components of the GithubWorkflowTool, including:
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- Workflow execution semantics
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- Job dependency resolution
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- Concurrent job execution
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- State transitions in the workflow engine
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- Cache and artifact management
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## Tools
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To work with TLA+ specifications, you'll need:
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- **TLA+ Toolbox**: The IDE for TLA+ (https://lamport.azurewebsites.net/tla/toolbox.html)
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- **TLC Model Checker**: For checking specifications (included with the Toolbox)
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- **TLAPS**: The TLA+ Proof System (optional, for formal proofs)
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## File Structure
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TLA+ specification files typically have the `.tla` extension. Each specification may include:
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- Module definitions
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- Constants and variables
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- Initial state predicates
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- Next-state actions
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- Invariants and temporal properties
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## Resources
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- [TLA+ Homepage](https://lamport.azurewebsites.net/tla/tla.html)
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- [Learn TLA+](https://learntla.com/)
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- [TLA+ Examples](https://github.com/tlaplus/Examples)
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- [Specifying Systems Book](https://lamport.azurewebsites.net/tla/book.html)
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