CAPE

Collaborative Agents Prompt Engineering — a multi-agent AI framework that runs a full product session (Product Owner → Designer → Developer) with a Cape Master facilitating and retrospecting.

Prerequisites

• Node.js 20+
• An Anthropic API key

Install

npm install -g @watilde/cape

Or use locally:

npm install
npm run build

Setup

Create a .env file in your project directory:

ANTHROPIC_API_KEY=sk-ant-...

Then initialize CAPE in your project:

cd your-project
cape init

cape init asks a few questions about your app and generates the cape/ directory with team context files that agents read during sessions.

Run a session

cape start

You'll be prompted for an objective. After each session completes, you're prompted again — press Enter on an empty line to quit.

Objective: Add a dark mode toggle
...session runs...

Objective: Fix the login error on mobile
...session runs...

Objective:   ← empty Enter to quit

Or run a single session via flags:

cape start --objective "Add a dark mode toggle" --lang ja

Options

| Flag | Default | Description | |------|---------|-------------| | --objective | (interactive) | Session objective | | --lang | en | Output language (en, ja, fr, de, es, zh, ko, pt) | | --task | task-<timestamp> | Custom task ID |

Agents

| Agent | Role | |-------|------| | CM (Cape Master) | Opens session with DoR check + coaching; closes with KPT retrospective | | POA | Product Owner — acceptance criteria, business value | | DA | Designer — UX rationale, component specs | | DevA | Developer — implementation plan + writes files to your project |

Session output

• cape/5_sessions/pair/ — raw agent artifacts (JSON)
• cape/5_sessions/retrospective/ — per-session KPT markdown
• cape/5_sessions/retrospective/kpt_merged.md — accumulated KPT across all sessions (read by CM at next session opening)

Environment variables

| Variable | Description | |----------|-------------| | ANTHROPIC_API_KEY | Required | | CAPE_PROMPT_DIR | Path to your cape/ directory (auto-set by cape start) | | CAPE_PROJECT_DIR | Root where DevA writes implementation files (defaults to cwd) |