MCPInstall

sparc-implement

by ruvnetBackend & APIs

Run the SPARC Pseudocode and Architecture phases (2 and 3) — write algorithm pseudocode, design module boundaries and API contracts, then implement

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Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/ruvnet/ruflo --skill sparc-implement
  1. 01

    Install

    Run the command in your project. The CLI asks which agents to install for.

  2. 02

    Describe the task

    Ask your agent for something this skill covers. It loads sparc-implement automatically when relevant.

  3. 03

    Review the result

    The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

SPARC Architecture + Implementation

Run Phases 2 and 3 of the SPARC methodology: design algorithms with pseudocode, then establish architecture with module boundaries and API contracts.

When to use

After the Specification phase is complete and its gate has been passed. This skill covers both the Pseudocode and Architecture phases as they are tightly coupled — algorithm design informs module boundaries and vice versa.

Steps

  1. Retrieve specification — call mcp__plugin_ruflo-core_ruflo__memory_search with namespace sparc-phases and query for the feature's spec. Extract requirements, acceptance criteria, constraints, and edge cases.

  2. Retrieve phase state — call mcp__plugin_ruflo-core_ruflo__memory_search with namespace sparc-state and query for the feature to confirm we are in Phase 2 or 3.

  3. Search for architectural patterns — call mcp__plugin_ruflo-core_ruflo__neural_predict with the feature description to find relevant architectural decisions from past projects

  4. Phase 2 — Pseudocode Design: a. For each acceptance criterion, write language-agnostic pseudocode that satisfies it b. Define core data structures with type annotations c. Map control flow including:

    • Happy path
    • Error/exception paths for each edge case
    • Concurrent access handling if applicable d. Annotate algorithmic complexity (time and space) for critical paths e. Store pseudocode artifact:
    • Call mcp__plugin_ruflo-core_ruflo__memory_store with namespace sparc-phases, key pseudo-{feature-slug}
    • Value: { status: "complete", algorithms: [...], dataStructures: [...], controlFlow: [...], complexity: {...} }

  5. Phase 3 — Architecture Design: a. Define bounded contexts and aggregate roots following DDD patterns:

    • Identify entity boundaries and value objects
    • Define aggregate invariants
    • Map domain events b. Design API contracts:
    • Request/response schemas with TypeScript interfaces
    • Error response codes and formats
    • Versioning strategy if applicable c. Plan module boundaries:
    • Directory structure
    • Dependency direction rules (no circular dependencies)
    • Public vs internal interfaces d. Specify infrastructure concerns:
    • Persistence strategy (database, cache, file)
    • Messaging patterns (sync, async, event-driven)
    • Configuration and environment requirements e. Store architecture artifact:
    • Call mcp__plugin_ruflo-core_ruflo__memory_store with namespace sparc-phases, key arch-{feature-slug}
    • Value: { status: "complete", boundedContexts: [...], apiContracts: [...], moduleBoundaries: {...}, infrastructure: {...} }

  6. Update phase state — call mcp__plugin_ruflo-core_ruflo__memory_store with namespace sparc-state, updating current phase to 3 (Architecture) with both artifacts recorded

  7. Record trajectory step — call mcp__plugin_ruflo-core_ruflo__hooks_intelligence_trajectory-step with architecture summary

  8. Begin implementation — if the user confirms, proceed to write production code: a. Create files following the defined module boundaries b. Implement interfaces and types first c. Implement core logic following the pseudocode d. Write unit tests alongside implementation (TDD when possible) e. Run tests to verify acceptance criteria

  9. Present architecture — display the architecture decision record and suggest running /sparc advance to pass the Phase 3 gate

Output format

# Pseudocode: {Feature Name}

## Core Algorithms
### Algorithm 1: {name}
```pseudocode
FUNCTION processRequest(input):
    VALIDATE input against schema
    IF invalid THEN THROW ValidationError
    result <- TRANSFORM input
    STORE result
    RETURN result

Complexity: O(n) time, O(1) space

Data Structures

  • {StructName}: { field1: type, field2: type }

Architecture: {Feature Name}

Bounded Contexts

  • {ContextName}: {description}
    • Aggregates: {list}
    • Events: {list}

API Contracts

POST /api/{resource}

  • Request: { field1: string, field2: number }
  • Response: { id: string, ...fields }
  • Errors: 400 (validation), 409 (conflict), 500 (internal)

Module Structure

src/{feature}/
  {feature}.types.ts      # Interfaces and types
  {feature}.service.ts     # Business logic
  {feature}.controller.ts  # HTTP handling
  {feature}.repository.ts  # Data access
  {feature}.test.ts        # Tests

Infrastructure

  • Persistence: {strategy}
  • Caching: {strategy}
  • Events: {strategy}

Phases 2-3 complete. Run /sparc advance to pass the gate check.

FAQ

What does the sparc-implement skill do?

Run the SPARC Pseudocode and Architecture phases (2 and 3) — write algorithm pseudocode, design module boundaries and API contracts, then implement

How do I install sparc-implement?

Run npx skills add https://github.com/ruvnet/ruflo --skill sparc-implement in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/sparc-implement/ (personal) or .claude/skills/sparc-implement/ (project).

Which AI agents can use sparc-implement?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is sparc-implement safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains sparc-implement?

It is published by ruvnet in ruvnet/ruflo. It has 734 recorded installs.

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