# Define Tech Spec

> Create tech specs with architecture for Stage C of the VibeFlow docs-first workflow

- Skill: `hardness1020/define-tech-spec` (Agent Skill, multi-file: 3 files)
- Install (CLI): `npx skillmds@latest add hardness1020/define-tech-spec`
- Raw SKILL.md: https://api.skillmd.com/api/skills/hardness1020/define-tech-spec/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Productivity
- Author: hardness1020 (https://skillmd.com/u/hardness1020)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/hardness1020/define-tech-spec

---


# define-tech-spec

Create tech specs with architecture for Stage C of the VibeFlow docs-first workflow.

## Purpose

This skill creates and validates Tech Spec documents for Stage C:
- Define architecture and interfaces
- Document data contracts and SLOs
- Specify component inventory and topology

## Workflow

```
Stage C: Specify
    │
    ├── Create/update Tech Specs
    ├── Define architecture and interfaces
    └── Document data contracts and SLOs
```

## Usage

### Create/Update Tech Spec

```
/define-tech-spec <spec-name>
```

Creates or updates `docs/specs/spec-<name>.md`.

Example:
```
/define-tech-spec api
/define-tech-spec llm
```

## Document Requirements

### Tech Spec (`docs/specs/spec-<name>.md`)

Required sections:
- Header (version, status, PRD link, contract versions)
- Overview & Goals
- Architecture (topology diagram + component inventory)
- Interfaces & Data Contracts
- Data & Storage
- Reliability & SLIs/SLOs
- Security & Privacy
- Evaluation Plan

## Validation

- `scripts/validate_techspec.py` — Validate tech spec

## References

See `assets/`:
- `techspec-template.md` — Tech spec template

## Context7 Library Research

Follow the workflow in `.claude/rules/context7-research.md` to fetch current library documentation.

**What to look for:** API surfaces, configuration options, integration patterns, version constraints.

**Where to incorporate findings:**
- **Architecture** — topology and component interactions with external dependencies
- **Interfaces & Data Contracts** — exact types, parameters, and return values from library APIs
- **Reliability** — known limitations, failure modes, and SLO implications

## Manifest Update

After completing Stage C, update `docs/workflow-state.yaml`:

- Set `stage: C`
- Append to `docs.specs[]`: `docs/specs/spec-<name>.md`

## Git Commit

After completing this stage, ask the user for permission before committing:

```bash
git add docs/specs/spec-<name>.md docs/workflow-state.yaml
git commit -m "feat(spec): define <name> tech spec (#ft-<ID>)"
```

Replace `<name>` and `<ID>` with actual values.

## Auto-Advance

After the commit is complete, directly run `/manage-work advance <ID>` to advance to the next stage.