Generate phased, specification-driven implementation plans for Flutter mobile features. Creates structured plans with objectives, checkbox-format tasks, TDD steps, verification criteria, and risk assessments. Follows Flutter project conventions (lib/features/, domain/, data/, presentation/), build_runner workflow, and Clean Architecture patterns.
SkillScore68Maintained
Automatic
◆Frontend / UI pack
Last verified 8/6/2026
What it changes
Passed 15 of 22 test cases with the skill, and 5 of 22 without it.
Without skill23%
With skill68%
Checks it passed that the model alone missed
Declines to write backend Python server code.
Structures repository tasks following TDD sequence.
Contains no Dart code snippets in the plan description.
and 10 more in the full report
10 fixed5 passed either way7 still failing0 broke
Pass-rate lift
+45 pp
Tokens
+80%
Agent turns
0%
Response time
-23%
Model gemini-3.6-flashMeasured 8/6/2026v115 of 22 cases passed with skill
Tokens, turns and time describe resource use, not a dollar price.
See it in action
One of 10 test cases the skill fixed. Same model, same prompt, with and without the skill.
1 of 10
Prompt
When detailing tasks that modify `lib/core/network/api_client.dart` and `lib/features/auth/data/repositories/auth_repository_impl.dart`, how must file references be formatted in task descriptions?
What was checked, without and with the skill
Checked
Without skill
With skill
Cites file references using line numbers in filepath:line format.
Missed
Passed
case-21 · gemini-3.6-flash · 8/6/2026 · answers are capped and redacted
What's inside
The instructions your model reads when the skill loads.
SKILL.md353 linessingle file
Flutter Implementation Planner
Generate comprehensive, phased implementation plans for Flutter features.
Plans are description-only (no code), structured for TDD, and follow the
project's Clean Architecture conventions.
Planning-only skill. This skill produces plans. It does not modify code,
run tests, or create implementations.
When to Use
User explicitly requests a plan, roadmap, or implementation strategy
Complex task requiring structured breakdown before implementation
Handing a plan to another developer or implementation agent
Risk assessment and alternative approach analysis before committing
Planning Process
Step 1: Analyse the Codebase
Before writing anything, explore the project to understand: