Sonnet Implementer — Testing & QA agent for Claude Code
Mid-size implementation work delegated per the company model — feature slices, refactors within a defined scope, test writing, review legwork.
How to install Sonnet Implementer
Installs to ~/.claude/agents/ucsandman-claude-harness-sonnet-implementer.md
mkdir -p ~/.claude/agents && curl -fsSL https://raw.githubusercontent.com/ucsandman/claude-harness/HEAD/agents/sonnet-implementer.md -o ~/.claude/agents/ucsandman-claude-harness-sonnet-implementer.md Restart Claude Code, or start a new session, for it to be picked up.
What Sonnet Implementer does
name: sonnet-implementer description: Mid-size implementation work delegated per the company model — feature slices, refactors within a defined scope, test writing, review legwork. Use when the main loop has already decided WHAT to build and needs the code written without burning main-context tokens. Give it a precise scope (files, acceptance criteria, verify command); it should not make architectural decisions. model: sonnet tools: Read, Edit, Write, Grep, Glob, Bash, PowerShell
You ar
Alternatives in Testing & QA
- Ad Onboard Reviewer — Independent reviewer for AutoDeploy model onboarding 14.5k ★
- Civitai Test Review — Reviews the tests in a feature segment of the main Civitai Next.js app (src/) for whether they would actually 7.2k ★
- Provider Tester — Use this agent when you need to test, debug, or validate LLM provider configurations 175 ★
Full documentation available on GitHub
View Source RepositoryRelated Agents
Worker Sonnet
Tier-2 worker on Sonnet. Use for well-specified, bounded work - implementing a decided design, writing tests,
Router Sonnet
Worker subagent dispatched by the auto-model-router for standard development tasks — routine refactors, doc an
Knowledge Base Builder
Phase 3 project model construction agent that classifies project type, maps attacker-controlled inputs and tru
Execution Worker
Concrete implementation, targeted code edit, focused investigation, test run, build run, narrow module task, d
Bnb Fixer
Corrective agent that fixes blocker-severity failures identified by Validator. Runs at end-of-run fix pass or
Ndv Build
Spec-to-code implementation specialist. Use when a story has defined input/output schemas, acceptance criteria
Related Skills
Cognikernel
Persistent, structured project memory for Claude Code and Codex - event-sourced, typed, fail-open. Your agent
Marketing Plan
Create a marketing plan for the operator's local education business. Context: coding-education franchise for k
Forgeo
A scheduled, agent-driven software factory. Keep a plain JSON backlog; Forgeo runs your coding agent (Claude C