97 plugin
Skills distilled from the hard-won lessons of world-renowned programmers, in the spirit of '97 Things Every Programmer Should Know'. Your coding agent invokes them when about to refactor, write a test, design an API, or commit.
How to install the 97 plugin
Run both commands inside Claude Code. The first adds the marketplace once; the second installs the plugin.
/plugin marketplace add oribarilan/97
/plugin install 97@97-marketplaceWhat's inside 97
13 parts read from the plugin's own files.
Skills 12
Claude loads it when the task matches- api-design
Provides a rigid framework for designing and reviewing public APIs, interfaces, and module boundaries to ensure usability and correctness.
- before-you-refactor
Provides a rigid checklist and principles for evaluating, planning, and executing code refactors and restructures safely.
- build-deploy-and-tooling
Use when writing, reviewing, or changing build scripts, CI workflows, deploy pipelines, repo setup, or evaluating a new tool/dependency
- clean-code
Apply principles of readability, simplicity, and single responsibility when writing or reviewing non-trivial code logic.
- correctness-traps
Provides a structured checklist for identifying common software bugs in error handling, floating-point math, concurrency, and remote calls.
- domain-modeling
Define and structure domain concepts, types, and state storage to ensure code reflects the user's business language and design requirements.
- observability
Enables agents to implement structured logging, distributed tracing, and low-cardinality metrics for production-ready services.
- security-and-trust-boundaries
Provides a rigid framework for auditing code that crosses trust boundaries, focusing on injection, deserialization, secrets management, and crypto misuse.
- self-review
Enables an agent to perform a rigorous pre-commit audit of its own code, checking for security vulnerabilities, technical debt, and documentation quality.
- testing-discipline
Provides a checklist and principles for writing, reviewing, and designing high-quality unit, integration, and end-to-end tests.
- using-97
Activates a trigger-based map of programming principles to guide coding tasks like refactoring, testing, and API design.
- working-with-users-and-team
Facilitates requirement gathering, effort estimation, and stakeholder communication through active clarification and structured feedback loops.
Hooks 1
Runs on these events- SessionStartcommand
startup|clear|compact
Using 97 in Claude Code
Skills need no command. Claude reads them when your request matches what they describe.
Update, turn off or remove
- Update the plugin (shell)
- claude plugin update 97@97-marketplace
- Refresh the marketplace
- /plugin marketplace update 97-marketplace
- Turn it off for now
- /plugin disable 97@97-marketplace
- Remove it
- /plugin uninstall 97@97-marketplace
Skills in 97
- api-designoribarilan/97
Provides a rigid framework for designing and reviewing public APIs, interfaces, and module boundaries to ensure usability and correctness.
2 files25stars - before-you-refactororibarilan/97
Provides a rigid checklist and principles for evaluating, planning, and executing code refactors and restructures safely.
2 files25stars - build-deploy-and-toolingoribarilan/97
Use when writing, reviewing, or changing build scripts, CI workflows, deploy pipelines, repo setup, or evaluating a new tool/dependency
2 files25stars - clean-codeoribarilan/97
Apply principles of readability, simplicity, and single responsibility when writing or reviewing non-trivial code logic.
2 files25stars - correctness-trapsoribarilan/97
Provides a structured checklist for identifying common software bugs in error handling, floating-point math, concurrency, and remote calls.
2 files25stars - domain-modelingoribarilan/97
Define and structure domain concepts, types, and state storage to ensure code reflects the user's business language and design requirements.
2 files25stars - observabilityoribarilan/97
Enables agents to implement structured logging, distributed tracing, and low-cardinality metrics for production-ready services.
2 files25stars - security-and-trust-boundariesoribarilan/97
Provides a rigid framework for auditing code that crosses trust boundaries, focusing on injection, deserialization, secrets management, and crypto misuse.
2 files25stars - self-revieworibarilan/97
Enables an agent to perform a rigorous pre-commit audit of its own code, checking for security vulnerabilities, technical debt, and documentation quality.
2 files25stars - testing-disciplineoribarilan/97
Provides a checklist and principles for writing, reviewing, and designing high-quality unit, integration, and end-to-end tests.
2 files25stars - working-with-users-and-teamoribarilan/97
Facilitates requirement gathering, effort estimation, and stakeholder communication through active clarification and structured feedback loops.
2 files25stars - using-97oribarilan/97
Activates a trigger-based map of programming principles to guide coding tasks like refactoring, testing, and API design.
25stars
97 plugin questions
How do I install the 97 plugin?
In Claude Code run /plugin marketplace add oribarilan/97, then /plugin install 97@97-marketplace.
What does the 97 plugin include?
97 bundles 12 skills, hooks.
How do I update or remove the 97 plugin?
Update it with claude plugin update 97@97-marketplace in your shell, or from the Installed tab of /plugin. Remove it with /plugin uninstall 97@97-marketplace.
What license is the 97 plugin under?
MIT, as stated in the plugin's manifest.