Build a thin end-to-end slice across DB, API, WebSocket, and Client layers.
npx skills add https://github.com/eins78/agent-skills --skill tracer-bullets-eins78
Please help me install this Agent Skill. Skill: tracer-bullets Source: https://github.com/eins78/agent-skills/tree/main/skills/tracer-bullets Command: npx skills add https://github.com/eins78/agent-skills --skill tracer-bullets-eins78
Tracer Bullets solve architectural uncertainty by forcing a single, end-to-end implementation that validates integration across all system layers before widening.
On a feature branch, run the tracer bullets workflow to produce a validated end-to-end slice.
High-intent search queries and answers about installing and using this skill.
Building a tracer bullet means implementing a single end-to-end vertical slice across all layers, such as DB to API to Client. You write production-ready code with minimal error handling to validate the full architecture path before widening the feature.
A tracer bullet is a single, end-to-end implementation that validates integration across all system layers. Use it for large multi-layer features where the path is not well established across DB, API, WebSocket, and Client to solve architectural uncertainty.
No, tracer bullets validate architecture through real integration, not proofs or mocks. You must build production-ready tracer code that touches every layer to ensure the end-to-end path across DB, API, WebSocket, and Client functions correctly.
No, a tracer bullet requires only minimal error handling. It focuses on creating a thin vertical slice with clear traceability across all layers, serving as a planning tool to narrow scope and validate integration before widening the implementation.
The best way to plan a large multi-layer feature is using a tracer bullet workflow. By building one thin vertical slice across DB, API, WebSocket, and Client, you validate real integration to narrow scope before widening the implementation.
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