implement-feature

1# Implement Feature
2 
3Implements a feature from its specification using the Forja (Dev) agent.
4 
5## When to Use This Skill
6 
7- A feature spec has been approved and is ready for implementation
8- You need architecture design, code, and tests for a defined feature
9- Translating product requirements into working software
10 
11## What This Skill Does
12 
131. Runs the SIGN IN checklist and verifies the spec handoff
142. Designs architecture (creates ADR if needed)
153. Defines interfaces/contracts, then implements in `src/`
164. Writes tests in `tests/` (unit + integration)
175. Runs the Implementation Complete checklist (TIME OUT 1)
186. Runs the Pre-Delivery checklist (TIME OUT 2)
197. Prepares structured handoff to QA agent
208. Runs the SIGN OUT checklist
21 
22## How to Use
23 
24### Basic Usage
25 
26```
27/implement-feature webhook-event-system
28```
29 
30### With Spec Reference
31 
32```
33/implement-feature docs/specs/webhook-event-system.md
34```
35 
36## Example
37 
38**User**: `/implement-feature user-authentication`
39 
40**Output**:
41- Implementation in `src/` with all acceptance criteria met
42- Tests in `tests/` covering critical paths
43- ADR if significant architecture decisions were made
44- Handoff notes for QA: files changed, how to test, known limitations
45 
46## Tips
47 
48- Ensure the feature spec exists before running this skill
49- The agent creates an ADR for any significant architecture decisions
50- Two TIME OUT checkpoints ensure both correctness and delivery cleanliness