From Napkin
Generates structured implementation plans for new features, refactoring, upgrades, or architecture changes. Plans are designed for autonomous execution by AI agents or humans.
How this skill is triggered — by the user, by Claude, or both
Slash command
/napkin:create-implementation-planThe summary Claude sees in its skill listing — used to decide when to auto-load this skill
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.
Your goal is to create a new implementation plan file for ${input:PlanPurpose}. Your output must be machine-readable, deterministic, and structured for autonomous execution by other AI systems or humans.
This prompt is designed for AI-to-AI communication and automated processing. All instructions must be interpreted literally and executed systematically without human interpretation or clarification.
Plans must consist of discrete, atomic phases containing executable tasks. Each phase must be independently processable by AI agents or humans without cross-phase dependencies unless explicitly declared.
/plan/ directory[purpose]-[component]-[version].mdupgrade|refactor|feature|data|infrastructure|process|architecture|designupgrade-system-command-4.md, feature-auth-module-1.mdAll implementation plans must strictly adhere to the following template. Each section is required and must be populated with specific, actionable content. AI agents must validate template compliance before execution.
REQ-NNN, SEC-NNN, CON-NNN, GUD-NNN, PAT-NNN, GOAL-NNN, TASK-NNN, ALT-NNN, DEP-NNN, FILE-NNN, TEST-NNN, RISK-NNN, ASSUMPTION-NNN) must be declared exactly once. A declaration is where the identifier introduces a row: the leading cell in a TASK/GOAL table row, or the bolded prefix in a bullet line like - **REQ-001**: .... The same identifier may then appear any number of times as a reference elsewhere in the plan (a TASK body citing a REQ, one TASK citing another TASK, the Dependencies section pointing at a DEP already declared upstream, etc.). References are expected and not collisions.Run these checks before finalizing the plan. Checks (1) and (2) target declarations and must return zero rows. Check (3) is a broad informational scan: it will surface valid references too, so use it for awareness rather than as a gate.
# Set PLAN_FILE to the plan being validated.
PLAN_FILE="/plan/<purpose>-<component>-<version>.md"
# 1) Duplicate TASK / GOAL declarations in table rows.
grep -oE '\| (TASK|GOAL)-[0-9]+ \|' "$PLAN_FILE" \
| sed -E 's/.*((TASK|GOAL)-[0-9]+).*/\1/' \
| sort | uniq -d
# 2) Duplicate declaration IDs in bullet-style spec lines.
grep -oE '^- \*\*(REQ|SEC|CON|GUD|RISK|ASSUMPTION|TASK|GOAL|FILE|TEST|PAT|ALT|DEP)-[0-9]+\*\*:' "$PLAN_FILE" \
| sed -E 's/^- \*\*([A-Z]+-[0-9]+)\*\*:.*/\1/' \
| sort | uniq -d
# 3) Broad duplicate scan (diagnostic only; may include valid references).
grep -oE '(REQ|SEC|CON|GUD|RISK|ASSUMPTION|TASK|GOAL|FILE|TEST|PAT|ALT|DEP)-[0-9]+' "$PLAN_FILE" \
| sort | uniq -d
Prerequisites: a POSIX-compatible shell (sh / bash) with grep, sed, sort, and uniq. On Windows without these tools, use equivalent platform-native commands and preserve the same declaration-vs-reference logic.
If check (1) or (2) returns any row, re-number the duplicate so each identifier is declared exactly once, then re-run the checks until both are empty.
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

[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]
npx claudepluginhub ani1797/forge --plugin copilot-sdkGenerates and updates structured implementation plan files for new features, refactoring, package upgrades, design, architecture, or infrastructure. Useful for breaking down work into executable phases.
Writes detailed implementation plans from specs for multi-step tasks before coding, with file structure maps, TDD bite-sized steps, and markdown tracking format.
Create detailed execution-ready implementation plans for complex or high-risk changes without coding. Useful for refactors, migrations, resumable phase checklists, and hand-offs to execute-plan.