Spec Implementer — Testing & QA agent for Claude Code
Use this agent to implement code strictly according to the design basis — design.md + tasks.md in Spec Mode, or the plan file in Quick Fix Mode.
How to install Spec Implementer
Installs to ~/.claude/agents/jasoncychueh-claude-spec-driven-dev-plugin-spec-implementer.md
mkdir -p ~/.claude/agents && curl -fsSL https://raw.githubusercontent.com/jasoncychueh/claude-spec-driven-dev-plugin/HEAD/agents/spec-implementer.md -o ~/.claude/agents/jasoncychueh-claude-spec-driven-dev-plugin-spec-implementer.md Restart Claude Code, or start a new session, for it to be picked up.
What Spec Implementer does
name: spec-implementer description: "Use this agent to implement code strictly according to the design basis — design.md + tasks.md in Spec Mode, or the plan file in Quick Fix Mode. Operates in two modes: (Mode 1) Initial implementation — given a task list (from tasks.md, or the plan file's change list), implement code from scratch; (Mode 2) Issue-driven fix — given an issue list from implementation-reviewer, fix existing code per each issue. The session stays alive across the implementation
Alternatives in Testing & QA
- Critical Thinking — Critical thinking mode that challenges assumptions and probes reasoning 100 ★
- Python Test Engineer — Use this agent when you need to create new tests, fix failing tests, refactor test code, or improve test organ 95 ★
- TypeScript Test Explorer — Use this agent when you need comprehensive test case design and exploratory testing for TypeScript code 76 ★
Full documentation available on GitHub
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Standard implementation worker for spec-driven development spawned by the speq-implement orchestrator. Execute
Related Skills
/implement Command
Execute implementation plan using the code-implementer agent with automatic self-correction.
ExecuteTask
Phase 6 — implement tasks in order, choosing the loop (core / red-green-refactor / prompt-iteration) per task;
Improve.SKILL
Use to audit a codebase or branch and write self-contained, gated implementation plans that cheaper agents exe