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Create Implementation Plan

  • 218 installs
  • 2 repo stars
  • Updated July 24, 2026
  • ilteoood/harness

This is a copy of create-implementation-plan by github - installs and ranking accrue to the original listing.

Create-implementation-plan is an agent skill that produces machine-readable implementation plans with phased, deterministic tasks for autonomous execution.

About

Create-implementation-plan is a Harness skill for solo builders who want specs that agents can execute without clarifying questions. Invoke it when starting a new feature, refactoring, upgrading dependencies, or changing design, architecture, or infrastructure—any time ad-hoc chat planning would leave gaps in file paths and acceptance criteria. The skill mandates fully self-contained plans: phased structure, parallelizable tasks where possible, and zero ambiguous wording. It fits intermediate users who already know what they want built but need the handoff artifact. Primary home is Build PM; it also supports Validate scoping when you need a written execution contract before committing engineering time. Output is meant for autonomous follow-up by other skills or the same agent in execution mode.

  • AI-to-AI directive: output must be machine-readable and deterministic
  • Discrete atomic phases with measurable completion criteria
  • Tasks require explicit file paths, function names, and implementation details
  • Parallel task execution within phases unless dependencies are declared
  • Covers new features, refactors, package upgrades, design, architecture, and infrastructure

Create Implementation Plan by the numbers

  • 218 all-time installs (skills.sh)
  • +30 installs in the week ending Jul 25, 2026 (Skillselion tracking)
  • Security screen: LOW risk (skills.sh audit)
  • Data as of Jul 25, 2026 (Skillselion catalog sync)
npx skills add https://github.com/ilteoood/harness --skill create-implementation-plan

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Listed on Skillselion
Installs218
repo stars2
Security audit3 / 3 scanners passed
Last updatedJuly 24, 2026
Repositoryilteoood/harness

What it does

Generate a deterministic, machine-readable implementation plan with phased atomic tasks before your agent or you execute a feature, refactor, or upgrade.

Who is it for?

Best when you're delegating multi-step coding work to agents and need Confluence-free, repo-grounded planning artifacts.

Skip if: One-line bugfixes, pure brainstorming with no approved direction, or teams that only need informal todos without file paths.

When should I use this skill?

Create a new implementation plan file for new features, refactoring existing code or upgrading packages, design, architecture or infrastructure.

What you get

You get a new implementation plan document with atomic phases, explicit paths, and completion criteria ready for execution or review.

  • Implementation plan file with phased atomic tasks
  • Measurable per-phase completion criteria
  • Parallelizable task graph with declared dependencies

Files

SKILL.mdMarkdownGitHub ↗

Create Implementation Plan

Primary Directive

Your goal is to create a new implementation plan file for ${input:PlanPurpose}. Your output must be machine-readable, deterministic, and structured for autonomous execution by other AI systems or humans.

Execution Context

This prompt is designed for AI-to-AI communication and automated processing. All instructions must be interpreted literally and executed systematically without human interpretation or clarification.

Core Requirements

  • Generate implementation plans that are fully executable by AI agents or humans
  • Use deterministic language with zero ambiguity
  • Structure all content for automated parsing and execution
  • Ensure complete self-containment with no external dependencies for understanding

Plan Structure Requirements

Plans must consist of discrete, atomic phases containing executable tasks. Each phase must be independently processable by AI agents or humans without cross-phase dependencies unless explicitly declared.

Phase Architecture

  • Each phase must have measurable completion criteria
  • Tasks within phases must be executable in parallel unless dependencies are specified
  • All task descriptions must include specific file paths, function names, and exact implementation details
  • No task should require human interpretation or decision-making

AI-Optimized Implementation Standards

  • Use explicit, unambiguous language with zero interpretation required
  • Structure all content as machine-parseable formats (tables, lists, structured data)
  • Include specific file paths, line numbers, and exact code references where applicable
  • Define all variables, constants, and configuration values explicitly
  • Provide complete context within each task description
  • Use standardized prefixes for all identifiers (REQ-, TASK-, etc.)
  • Include validation criteria that can be automatically verified

Output File Specifications

  • Save implementation plan files in /plan/ directory
  • Use naming convention: [purpose]-[component]-[version].md
  • Purpose prefixes: upgrade|refactor|feature|data|infrastructure|process|architecture|design
  • Example: upgrade-system-command-4.md, feature-auth-module-1.md
  • File must be valid Markdown with proper front matter structure

Mandatory Template Structure

All implementation plans must strictly adhere to the following template. Each section is required and must be populated with specific, actionable content. AI agents must validate template compliance before execution.

Template Validation Rules

  • All front matter fields must be present and properly formatted
  • All section headers must match exactly (case-sensitive)
  • All identifier prefixes must follow the specified format
  • Tables must include all required columns
  • No placeholder text may remain in the final output

Status

The status of the implementation plan must be clearly defined in the front matter and must reflect the current state of the plan. The status can be one of the following (status_color in brackets): Completed (bright green badge), In progress (yellow badge), Planned (blue badge), Deprecated (red badge), or On Hold (orange badge). It should also be displayed as a badge in the introduction section.

---
goal: [Concise Title Describing the Package Implementation Plan's Goal]
version: [Optional: e.g., 1.0, Date]
date_created: [YYYY-MM-DD]
last_updated: [Optional: YYYY-MM-DD]
owner: [Optional: Team/Individual responsible for this spec]
status: 'Completed'|'In progress'|'Planned'|'Deprecated'|'On Hold'
tags: [Optional: List of relevant tags or categories, e.g., `feature`, `upgrade`, `chore`, `architecture`, `migration`, `bug` etc]
---

# Introduction

![Status: <status>](https://img.shields.io/badge/status-<status>-<status_color>)

[A short concise introduction to the plan and the goal it is intended to achieve.]

## 1. Requirements & Constraints

[Explicitly list all requirements & constraints that affect the plan and constrain how it is implemented. Use bullet points or tables for clarity.]

- **REQ-001**: Requirement 1
- **SEC-001**: Security Requirement 1
- **[3 LETTERS]-001**: Other Requirement 1
- **CON-001**: Constraint 1
- **GUD-001**: Guideline 1
- **PAT-001**: Pattern to follow 1

## 2. Implementation Steps

### Implementation Phase 1

- GOAL-001: [Describe the goal of this phase, e.g., "Implement feature X", "Refactor module Y", etc.]

| Task | Description | Completed | Date |
|------|-------------|-----------|------|
| TASK-001 | Description of task 1 | ✅ | 2025-04-25 |
| TASK-002 | Description of task 2 | |  |
| TASK-003 | Description of task 3 | |  |

### Implementation Phase 2

- GOAL-002: [Describe the goal of this phase, e.g., "Implement feature X", "Refactor module Y", etc.]

| Task | Description | Completed | Date |
|------|-------------|-----------|------|
| TASK-004 | Description of task 4 | |  |
| TASK-005 | Description of task 5 | |  |
| TASK-006 | Description of task 6 | |  |

## 3. Alternatives

[A bullet point list of any alternative approaches that were considered and why they were not chosen. This helps to provide context and rationale for the chosen approach.]

- **ALT-001**: Alternative approach 1
- **ALT-002**: Alternative approach 2

## 4. Dependencies

[List any dependencies that need to be addressed, such as libraries, frameworks, or other components that the plan relies on.]

- **DEP-001**: Dependency 1
- **DEP-002**: Dependency 2

## 5. Files

[List the files that will be affected by the feature or refactoring task.]

- **FILE-001**: Description of file 1
- **FILE-002**: Description of file 2

## 6. Testing

[List the tests that need to be implemented to verify the feature or refactoring task.]

- **TEST-001**: Description of test 1
- **TEST-002**: Description of test 2

## 7. Risks & Assumptions

[List any risks or assumptions related to the implementation of the plan.]

- **RISK-001**: Risk 1
- **ASSUMPTION-001**: Assumption 1

## 8. Related Specifications / Further Reading

[Link to related spec 1]
[Link to relevant external documentation]

Related skills

How it compares

Structured implementation-plan files for agent execution—not open-ended brainstorming or a single-shot code generator.

FAQ

Who is create-implementation-plan for?

Developers using Claude Code, Cursor, or Codex who want phased plans before autonomous implementation runs.

When should I use create-implementation-plan?

Use it in Validate when scoping a prototype or refactor contract; in Build PM before features or infra changes; and in Ship when planning a structured migration or upgrade with clear phase gates.

Is create-implementation-plan safe to install?

Review the Security Audits panel on this Prism page; the skill writes planning docs—risk depends on what paths and commands your agent executes after the plan is approved.

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