# Design Implementation

> A Claude skill from krkruk/openspec-vibe-with-esa-touch.

- **Type:** Skill
- **Install:** `agentstack add skill-krkruk-openspec-vibe-with-esa-touch-design-implementation`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [krkruk](https://agentstack.voostack.com/s/krkruk)
- **Installs:** 0
- **Category:** [Agent Skills](https://agentstack.voostack.com/c/agent-skills)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [krkruk](https://github.com/krkruk)
- **Source:** https://github.com/krkruk/openspec-vibe-with-esa-touch/tree/master/.claude/skills/design-implementation

## Install

```sh
agentstack add skill-krkruk-openspec-vibe-with-esa-touch-design-implementation
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# Design & Implementation

This skill guides you through the Design and Implementation Engineering phase of the ECSS software development pipeline.

## Purpose

This phase involves detailed design of software items, coding, unit testing, and integration. It transforms the technical specification and architecture into working, tested software while managing technical budgets.

## Key Activities

- **Detailed design**: Create low-level design for each software component
- **Coding**: Implement algorithms and software components according to design
- **Unit testing**: Verify each software unit independently
- **Integration**: Combine tested units into larger components
- **Manage technical budgets**: Monitor memory usage and PU (Processing Unit) load

## Technical Budget Management

Critical activities for space systems:
- **Memory budget**: Track code, data, and stack memory usage against allocation
- **PU load budget**: Monitor CPU utilization against worst-case execution time allocations
- **Budget reconciliation**: Verify measured values against predicted values

## V&V Focus

Verification and validation activities in this phase focus on:
- Verification of detailed design against technical specification
- Verification of code implementation against design
- Verification of unit test results
- Verification of integration results
- Validation activities against technical specification

## Milestone: CDR (Critical Design Review)

The CDR is the gate to the validation and qualification phase. Before CDR approval, ensure:
- Detailed design is complete and documented
- Code listings are available and reviewed
- Unit testing is complete and documented
- Integration testing is complete and documented
- Technical budgets are within allocated limits
- Validation against technical specification has been conducted
- All algorithms are correctly implemented

## Inputs & Outputs

| Inputs | Outputs |
|--------|---------|
| Technical specification | Detailed design documents |
| Software architecture | Source code listings |
| Component definitions | Unit test results |
| SVerP (Software Verification Plan) | Integration test results |
| Performance budgets | Budget measurement reports |
| | Code reviews |

## Checklist

- [ ] Detailed design for all software items completed
- [ ] Detailed design verified against technical specification
- [ ] Code implementation completed
- [ ] Code reviewed for compliance and quality
- [ ] Unit tests written and executed
- [ ] Unit test results verified
- [ ] Integration completed
- [ ] Integration tests executed and passed
- [ ] Memory budget measured and within limits
- [ ] PU load budget measured and within limits
- [ ] Algorithms verified for correctness
- [ ] Validation activities against technical spec conducted
- [ ] CDR package prepared and reviewed

## Related Phases

- **Previous:** Software Requirements & Architecture (invoke `/sw-requirements-architecture`)
- **Next:** Validation & Qualification (invoke `/validation-qualification`)

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [krkruk](https://github.com/krkruk)
- **Source:** [krkruk/openspec-vibe-with-esa-touch](https://github.com/krkruk/openspec-vibe-with-esa-touch)
- **License:** MIT

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-krkruk-openspec-vibe-with-esa-touch-design-implementation
- Seller: https://agentstack.voostack.com/s/krkruk
- Browse the marketplace: https://agentstack.voostack.com/browse

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Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.