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Turn a PRD into a multi-phase implementation plan using tracer-bullet vertical slices, saved as a local Markdown file in ./plans/.
Passed 11 of 22 test cases with the skill, and 11 of 22 without it.
and 4 more in the full report
6 fixed7 passed either way7 still failing3 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 6 test cases the skill fixed. Same model, same prompt, with and without the skill.
Where should the generated Markdown plan file be stored in the repository structure when creating an implementation plan from a PRD?
| Checked | Without skill | With skill |
|---|---|---|
| The output path is located inside a designated plans folder. | Missed | Passed |
The instructions your model reads when the skill loads.
Break a PRD into a phased implementation plan using vertical slices (tracer bullets). Output is a Markdown file in ./ai-context/plans/.
The PRD should already be in the conversation. If it isn't, ask the user to paste it or point you to the file.
If you have not already explored the codebase, do so to understand the current architecture, existing patterns, and integration layers.
Before slicing, identify high-level decisions that are unlikely to change throughout implementation:
These go in the plan header so every phase can reference them.
Break the PRD into tracer bullet phases. Each phase is a thin vertical slice that cuts through ALL integration layers end-to-end, NOT a horizontal slice of one layer.
test cases passed, vs 11 / 22 without
More skills from the same source and nearby in the registry, with their headline benchmark lift.