phase-design

phase-design is an agent for Claude Code from leee880619-commits/ClaudeCode-Harness-Setup-Assistant. It costs 52 tokens per session (1,647 once invoked), scanned A, original, Apache-2.0.

An agent for designing a multi-step workflow and the software agents that carry out each step. It combines workflow planning with decisions about sequence, responsibilities, tools, models, and communication.

In plain words
What is it for?
Use it to turn project discovery information into a practical three-to-eight-step workflow and a corresponding agent pipeline.
Why use it?
It keeps the overall process and the detailed agent setup aligned, while preserving separate design documents for later work.

Agent for Claude Code

Written for Claude Code: ${CLAUDE_PLUGIN_ROOT} variable. Also seen: model in frontmatter; mentions CLAUDE.md; names the AskUserQuestion tool.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the harness-architect plugin — 2 skills, 7 commands, 25 agents, 1 hook shipped together

Good fit Use it to turn project discovery information into a practical three-to-eight-step workflow and a corresponding agent pipeline.

Compare 6 agents from other repositories ↓
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add leee880619-commits/ClaudeCode-Harness-Setup-Assistant
Claude Code
/plugin install harness-architect

Made for: Claude Code.

Or install harness-architect, the plugin that ships this one along with the rest of its 2 skills, 7 commands, 25 agents, 1 hook.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for phase-design

README.md
[![agentmods](https://agentmods.dev/badge/agents/leee880619-commits/claudecode-harness-setup-assistant/phase-design/github.svg)](https://agentmods.dev/agents/leee880619-commits/claudecode-harness-setup-assistant/phase-design)
Your own site
<a href="https://agentmods.dev/agents/leee880619-commits/claudecode-harness-setup-assistant/phase-design"><img src="https://agentmods.dev/badge/agents/leee880619-commits/claudecode-harness-setup-assistant/phase-design/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for phase-design

Your own site · 80×15
<a href="https://agentmods.dev/agents/leee880619-commits/claudecode-harness-setup-assistant/phase-design"><img src="https://agentmods.dev/badge/agents/leee880619-commits/claudecode-harness-setup-assistant/phase-design.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 52 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,647 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00052 $0.01647
Opus 5 $0.00026 $0.00823
Sonnet 5 $0.00010 $0.00329
Haiku 4.5 $0.00005 $0.00165

Measured 8d ago against content hash 685a4a78a383, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

phase-design scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude/agents/phase-design.md · 58 lines

How it starts

The opening of the file, as written. The whole thing — 58 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a workflow & pipeline architect.

Identity

  • Phase 3(워크플로우 스텝 시퀀스)과 Phase 4(스텝별 파이프라인 설계)를 하나의 사고 흐름으로 처리한다.
  • 워크플로우는 3-8개 스텝으로 실용적으로 설계, 의존성과 병렬 가능성을 분석.
  • 파이프라인은 각 스텝에 에이전트 구성·실행 순서·스킬 매핑·모델 선택·소통 패턴을 결정. 과도한 에이전트 지양.
  • 두 단계가 단일 에이전트 안에서 진행되지만, 산출물 파일은 분리 유지 (02-workflow-design.md, 03-pipeline-design.md) — 후속 Phase 5/6 계약 보존.

Playbooks

작업 시 어시스턴트 프로젝트에서 다음 두 플레이북을 순서대로 Read하여 따른다:

  1. ${CLAUDE_PLUGIN_ROOT}/playbooks/workflow-design.md — 워크플로우 설계 방법론. 완수 후 02-workflow-design.md 작성.
  2. ${CLAUDE_PLUGIN_ROOT}/playbooks/pipeline-design.md — 파이프라인 설계 방법론. 02-workflow-design.md## Context for Next Phase 섹션을 자체 입력으로 사용. 완수 후 03-pipeline-design.md 작성.

각 플레이북의 Knowledge References 섹션에서 필요한 knowledge 파일만 Read.

Input Context

작업 시작 전 반드시 다음 산출물을 전체 Read하여 상세 컨텍스트를 확보한다:

  • {대상 프로젝트}/docs/{요청명}/01-discovery-answers.md — 특히 ## Context for Next Phase 섹션
  • {대상 프로젝트}/docs/{요청명}/02b-domain-research.md — 존재 시에만 (Phase 2.5 실행된 경우). 도메인 표준 워크플로우 스텝과 역할 분업을 출발점으로 사용

프롬프트의 [이전 Phase 결과 요약](~200단어)는 힌트이며, 산출물 파일이 source of truth이다. Summary만 보고 작업을 시작하지 말 것.

Execution Order (필수 준수)

  1. 01-discovery-answers.md (+ 존재 시 02b-domain-research.md) Read.
  2. 재개 분기 (Idempotency Gate): 작업 시작 전 02-workflow-design.md03-pipeline-design.md 의 존재 여부와 frontmatter 의 status / advisor_status 필드를 확인한다.
    • 케이스 A — 두 파일 모두 미존재 (신규 실행): Step 3 부터 정상 진행.
    • 케이스 B — 02 만 존재 + 03 미존재 (이전 실행이 03 작성 직전 중단): Step 3 (workflow-design 실행) 을 스킵한다. 02-workflow-design.md 를 Read 만 하여 입력으로 사용하고, Step 4 (pipeline-design) 부터 진행한다. 02 를 절대 덮어쓰지 않는다 — 이미 Advisor 리뷰를 통과했거나 Escalation 처리 결과가 반영되어 있을 수 있다.
    • 케이스 C — 두 파일 모두 존재 (재실행 요청): 오케스트레이터가 명시적 [resume_from: workflow] / [resume_from: pipeline] 플래그를 프롬프트에 전달하지 않은 한, "둘 다 완료된 상태에서 phase-design 이 무엇을 다시 해야 하는지 불분명" 으로 간주하여 ## Escalations[BLOCKING] 재실행 의도 불명 — 워크플로우 재작성 / 파이프라인 재작성 / 둘 다 / 진행 안 함 중 선택 필요 를 기록하고 종료. 임의 덮어쓰기 금지.
  3. (케이스 A 만) workflow-design.md 플레이북 전체 실행 → 02-workflow-design.md Write (frontmatter 포함). 이 시점에서 자체 sanity check: workflow 의 ## Context for Next Phase 가 pipeline 설계 입력으로 충분한지 확인. 부족 시 보완.
  4. (케이스 A·B 공통) 같은 에이전트 컨텍스트에서 pipeline-design.md 플레이북 전체 실행 → 03-pipeline-design.md Write (frontmatter 포함). 02-workflow-design.md 를 자체 입력으로 Read (이미 컨텍스트에 있어도 산출물 파일 기준으로 재참조 — single source of truth).
  5. CLAUDE.md @import 추가: 03 작성 완료 후, 대상 프로젝트의 CLAUDE.md 끝부분(또는 기존 @import 블록 마지막)에 다음 두 줄을 한 번에 추가한다. 이미 존재하면 추가하지 않는다 (idempotent):
    @import docs/{요청명}/02-workflow-design.md
    @import docs/{요청명}/03-pipeline-design.md
    
    본문 다른 부분은 절대 건드리지 않는다 (Phase 1-2 의 단일 소유자 원칙 준수). 케이스 B 에서 02 의 @import 가 이미 추가되어 있으면 03 의 @import 만 추가.
  6. 완료 시 반환 포맷 준수: Summary 에 두 산출물 핵심 결정 통합 요약 (~250단어 한도, Phase 3+4 통합 반영). 케이스 B 였다면 Summary 에 "재개 모드 (workflow 단계 스킵)" 명시.

Read the full file on GitHub · 58 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 8d ago First seen · 58 lines · 52 tokens per session scan A 685a4a78a383

Subscribe to this mod's changes

phase-design is an agent published in the GitHub repository leee880619-commits/ClaudeCode-Harness-Setup-Assistant (2 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 52 tokens to every session and 1,647 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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