--- name: double-diamond description: > Universal multi-agent orchestration workflow based on the Double Diamond framework (Inception -> Discovery -> Definition -> Development -> Delivery). Coordinates parallel subagents with context isolation to separate problem-space research from solution-space implementation. Activate for complex, high-ambiguity initiatives across software engineering, in-depth research, long-form writing, legal analysis, or product strategy requiring structured human alignment gates. license: Apache-2.0 metadata: category: agents tags: "orchestration, workflow, research, planning, subagents, agile" author: Daniela Petruzalek (daniela@danicat.dev) version: "0.2.0" catalog: https://skills.danicat.dev ---

# Double-Diamond Multi-Agent Orchestration

The `double-diamond` skill coordinates complex, high-ambiguity initiatives through the proven **Double Diamond** framework, preceded by an **Inception** alignment phase. It leverages **parallel subagents with context isolation** to thoroughly explore the problem space before committing to solution-space implementation.

``` INCEPTION PHASE (Pre-Diamond Alignment) /grill-me User Interview Establish Shared Understanding │ ▼ DIAMOND 1: PROBLEM SPACE DIAMOND 2: SOLUTION SPACE (Research & Exploration) (Creation & Verification)

/--- Discovery (Diverge) ---\ /--- Development (Diverge) ---\ / Parallel `research` sub- \ / Parallel creation sub- \ / agents explore landscape, \ / agents craft disjoint \ Start > constraints & prior art > Brief > sections/modules in parallel > Delivery \ / Gate \ / (Gates) \--- Definition (Converge) --/ \--- Delivery (Converge) ----/ Synthesize findings into Holistic review, integration, a Foundation Document and quality gate verification ```

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## 🌐 Universal Domain Mapping

Double Diamond adapts seamlessly across technical, creative, and analytical domains:

| Phase | Software Engineering | Writing & Publishing | Legal & Policy Research | Product & Strategy | | :--- | :--- | :--- | :--- | :--- | | **0. Inception** | Stack, constraints, latency, scope | Audience, tone, thesis, length | Jurisdiction, case theory, facts | Market, user persona, success metrics | | **1. Discover** *(Diverge)* | Codebase, APIs, edge cases | Background research, angles, data | Precedents, statutes, case law | Competitor analysis, customer interviews | | **2. Define** *(Converge)* | Technical Specification | Structured Editorial Outline | Legal Brief / Argument Structure | PRD / Feature Specification | | **Steering Gate** | Approve architecture & trade-offs | Approve thesis & outline | Approve legal theory & approach | Sign off on product direction | | **3. Develop** *(Diverge)* | Parallel module implementation | Parallel chapter/section drafting | Parallel argument/motion drafting | Parallel prototype/stream exploration | | **4. Deliver** *(Converge)* | Build, tests, lint, spec compliance | Fact-check, style, voice, flow | Citation audit, counter-arguments | Executive synthesis, launch readiness |

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## ⚡ Core Principles & Operational Rules

1. **Pre-Diamond Inception (Alignment Gate):** - Before launching research divergence, the Coordinator executes an **Inception** phase via the `/grill-me` interactive interview protocol (using `ask_question`). - The Coordinator explores the existing environment/context first, then interviews the user about goals, constraints, non-negotiables, target audience, and deliverable modality. 2. **Two Distinct Diamond Phases (Problem Space vs. Solution Space):** - **Diamond 1 (Problem Space):** Focuses exclusively on reconnaissance, constraint mapping, dependency analysis, and definition. No final deliverable code or prose is authored during Diamond 1. - **Diamond 2 (Solution Space):** Focuses on parallel creation against the approved definition, followed by rigorous quality gating. 3. **Context Isolation via Subagents:** - Deep exploration and multi-track creation happen in isolated subagent contexts (`research` for read-only exploration, `self` for creation). This prevents context pollution and hallucination in the Coordinator's session. 4. **Mandatory User Steering Gate (Human-in-the-Loop Alignment):** - Between Diamond 1 and Diamond 2, the Coordinator halts to present the synthesized **Foundation Document** (Spec, Outline, Brief, or PRD) and trade-offs to the user for explicit review and confirmation. 5. **Disjoint Work Allocation (Zero Collision):** - In Diamond 2 (Development), parallel creator subagents receive strictly disjoint assignments (e.g., distinct source files, separate article sections, independent legal claims) to prevent overwrite collisions. 6. **Domain-Specific Delivery Quality Gates:** - Work is not delivered until all domain-specific quality gates pass: structural integrity, localized unit/section verification, holistic consistency, and compliance with the approved Foundation Document.

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## 🎯 Agent Budget & Degree of Parallelism (DOP)

* **Definition**: **Agent Budget** is synonymous with **Degree of Parallelism (DOP)**. It defines the maximum number of **active, concurrent subagents** allowed to execute at the exact same time. * **Active vs. Past Capacity**: Completed or terminated subagents do **not** consume budget. The budget applies strictly to currently running subagents. When a subagent completes its work, its concurrency slot is immediately freed. * **Elastic Scaling**: While the baseline default is $\text{DOP} = 4$, the framework scales elastically to any user-requested budget (e.g., $\text{DOP} = 10, 20, 50+$) for massive parallel surveys, parameter sweeps, or multi-module initiatives. * **High-DOP High-Signal Mandate (Micro-Probe Rule)**: When operating with elevated concurrency ($\text{DOP} \ge 8$), subagents must act as focused micro-probes. The Coordinator instructs subagents to return dense, high-signal, structured summaries ($\le 150$ words or tabular format) rather than verbose essays, enabling clean Map-Reduce synthesis without context dilution.

### Recommended Baseline Sizing:

| Initiative Scale | Agent Budget ($\text{DOP}$) | Active Discovery Workers | Active Creation Workers | Typical Scope | | :--- | :---: | :---: | :---: | :--- | | **Focused / Targeted** | **2** | **2** (Landscape + Standards) | **2** (Core + Surface) | Single module, short article, targeted feature | | **Standard (Default)** | **4** | **4** (Landscape, Standards, Edge Cases, Comparative) | **4** (WPs 1–4 disjoint modules/sections) | Multi-module service, comprehensive whitepaper, PRD | | **Complex / Deep** | **6–8+** | **6–8+** (Subsystem reconnaissance / micro-probes) | **6–8+** (Distributed package authors) | Full architectural rewrite, multi-chapter publication | | **Massive Swarm** | **20–50+** | **20–50+** (Broad API surveys, micro-benchmarks, fuzzing) | **20–50+** (Massive parallel module/asset generation) | Wide ecosystem sweeps, multi-file migrations |

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## 📡 Non-Blocking Coordinator & Reactive Concurrency

The Coordinator is the primary conversational interface and strategic conductor. It must remain **permanently unblocked** to respond to user messages at any point during execution.

1. **Role Separation (Delegation over Execution):** - The Coordinator orchestrates, synthesizes, and interfaces with the user. It **never** blocks itself with long, sequential manual execution—heavy exploration and drafting are delegated to subagents. 2. **Fire-and-Yield Concurrency:** - When the Coordinator spawns subagents via `invoke_subagent`, it **immediately halts tool calls to end its turn**. It never loops, sleeps, or polls. 3. **Always Unblocked for User Queries:** - Because the Coordinator never enters busy-wait polling loops, it is always available to process incoming user messages while subagents work in the background: - **Status Inquiries**: The Coordinator can immediately provide progress updates or inspect active workers via `manage_subagents (Action="list")`. - **In-Flight Steering / Scope Changes**: If the user provides new constraints or changes requirements mid-run, the Coordinator can steer active subagents via `send_message` or cancel/restart them via `manage_subagents (Action="kill")`. 4. **Automatic Reactive Wakeup:** - When subagents finish their tasks, the messaging platform automatically wakes up the Coordinator with their full results.

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## 🧭 The 6-Step Double-Diamond Workflow

### 1. Step 0: Inception (Pre-Diamond Alignment) * Coordinator activates the `/grill-me` protocol, systematically interviewing the user one decision node at a time via `ask_question`. * Explores existing materials first, then clarifies scope boundaries, deliverable modality, non-negotiables, and user preferences. * **Reference Guide:** Read [`references/inception_phase.md`](references/inception_phase.md) for interview patterns and decision-tree traversal.

### 2. Step 1: Discover (Diamond 1 Divergence) * Coordinator decomposes the problem space into up to $\text{DOP}$ orthogonal exploration vectors (e.g., Landscape reconnaissance, Standards & APIs, Constraints & Failure modes, Prior art). * Spawns parallel `research` subagents using `invoke_subagent` and immediately yields execution. * **Reference Guide:** Read [`references/research_phase.md`](references/research_phase.md) for vector decomposition and prompt templates.

### 3. Step 2: Define (Diamond 1 Convergence) * Coordinator synthesizes research reports into a unified **Foundation Document** (Technical Specification, Editorial Outline, Legal Brief, or PRD). * Establishes system contracts, interfaces, chapter structure, or argument trees, alongside disjoint work package allocations. * **Document Template:** Populate [`assets/specification_template.md`](assets/specification_template.md) with research synthesis and work breakdowns.

### 4. Step 3: User Steering Gate (Interactive Alignment) * Coordinator presents the executive summary, draft Foundation Document, and architectural/editorial trade-offs to the user. * Solicits user feedback, resolves decision forks, and obtains explicit confirmation before proceeding to creation.

### 5. Step 4: Develop (Diamond 2 Divergence) * Coordinator spawns up to $\text{DOP}$ parallel creator subagents (`self` subagents with write & tool access) and immediately yields execution. * Each creator receives a strictly disjoint Work Package (WP) and executes localized verification: - **Software**: Package-scoped unit tests (`go test ./internal/pkg/...`, `pytest tests/unit/`, `npm test -- src/pkg/`). - **Writing**: Section drafting against word count, tone, and source citations. - **Legal/Policy**: Argument drafting with case citations and statutory cross-referencing. * **Reference Guide:** Read [`references/development_phase.md`](references/development_phase.md) for disjoint allocation and creator prompt templates.

### 6. Step 5: Deliver (Diamond 2 Convergence & Quality Gating) * Coordinator integrates all parallel deliverables into a coherent whole and executes end-to-end verification. * **Failure Recovery Protocol**: If any integration test, fact-check, or consistency check fails: 1. Isolate the failing component and review specific error traces or discrepancies. 2. Launch a targeted repair subagent with the exact context and interface contract. 3. Re-verify all delivery gates until 100% pass before presenting the final deliverable to the user.

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## ⚠️ Common Gotchas & Antipatterns

1. **Skipping Inception & As