why
Find the evidence behind your code's design.
What it does
Reconstructs the reasons behind code and design decisions into a cited explanation that separates evidence from inference.
When to use it
Use for design rationale, past decisions, regressions, postmortems, or the evidence behind numerical thresholds.
How to use it
Give it a question about why the project's code took its current shape; it returns cited findings, hypotheses, and evidence gaps.
What you provide
- An existing project
Uses
Good to know
- starts one helper agent per item, so the count depends on the work
- starts 1 helper agents
What you need · 4
Uses the GitHub CLI to retrieve pull-request bodies, comments, and reviews for substantive commits.
Requires its Subagents instructions to choose each helper's reasoning level; platform-specific mappings also point into this companion skill.
Access · 3
This skill
GitHub
Reads pull requests and reviews
Linear
Reads tickets and project documents