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Agent skill

Design Driven Dev

by ericmjl in ericmjl/llamabot

Guide for design-driven development with prescribed folder structure.

No licenceAuto-check passedDevelopment

Install Design Driven Dev

skills CLI
$ npx skills add ericmjl/llamabot --skill design-driven-dev -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install ericmjl/llamabot design-driven-dev --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/ericmjl/llamabot.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/design-driven-dev .claude/skills/design-driven-dev && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
design-driven-dev
GitHub stars
182
Token cost
~2k tokens
SKILL.md length
791 words
Files
4 (incl. references)
Skills in repo
4
Repo updated
First seen
Licence
None found

At a glance

Guide for design-driven development with prescribed folder structure.

  • Works in 3 steps: High-Level Design → Low-Level Design → EARS Specifications
  • Tasks that involve File organization
  • SKILL.md covers Critical Rule: Stop and Iterate, DOCS_DIR Discovery, Folder Structure and Workflow Overview, plus 8 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Design Driven Dev is an agent skill from ericmjl/llamabot. Guide for design-driven development with prescribed folder structure. New features use full workflow (HLD → LLD → EARS). Bug fixes skip doc creation but verify intent coherence.

Its SKILL.md is about 2k tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including reference files (for example `references/ears-syntax.md`, `references/hld-template.md` and `references/lld-template.md`).

It sits in Development, covering File organization and Debugging. The repository describes itself as: Pythonic class-based interface to LLMs.

When your agent uses it

  • Tasks that involve File organization
  • Tasks that involve Debugging

Example prompts

  • “/design-driven-dev”

Workflow steps

3 steps, taken from the step headings in SKILL.md.

  1. High-Level Design
  2. Low-Level Design
  3. EARS Specifications

What it can do on your machine

Read from SKILL.md and the folder at commit 30d24ae. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md (its code samples are markdown and typescript).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Design Driven Dev loads about 2k tokens when it runs, and up to ~6.9k if it reads all its reference files. Until then it costs about 49 tokens; SKILL.md has 791 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~49
When it runs · the whole SKILL.md, loaded when a task matches
~2k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~6.9k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Without a licence we can't republish the file, so here is its outline and opening line. It has 791 words (~1,985 tokens).

“This skill guides a structured design-driven development workflow. The goal is to get alignment on what you're building before writing code, which dramatically reduces rework and misunderstandings.”

— opening of SKILL.md by ericmjl
name
design-driven-dev

Read the full SKILL.md on GitHub

Files

SKILL.md and 3 other files (references) in .agents/skills/design-driven-dev of ericmjl/llamabot.

  • SKILL.md
  • references/ears-syntax.md
  • references/hld-template.md
  • references/lld-template.md

Open the folder on GitHubat commit 30d24ae

Compare with similar skills

Design Driven Dev next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Design Driven Dev compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Design Driven Dev this skillericmjl/llamabot182—~2kAutomated safety check: PassNone
Trellis Session Insightmindfold-ai/Trellis15k4 repos~1.7kAutomated safety check: PassAGPL-3.0
Native Data FetchingCherryHQ/cherry-studio-app4k6 repos~2.9kAutomated safety check: NotesMIT
Debugging Executionsn8n-io/n8n207k—~2.6kAutomated safety check: PassCustom licence
Aoti Debugpytorch/pytorch104k1 repos~1.7kAutomated safety check: PassCustom licence
Herdr Throwaway Reproductionherdrdev/herdr43k—~2.4kAutomated safety check: PassApache-2.0

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Categories

Questions about Design Driven Dev

What does Design Driven Dev do?

Guide for design-driven development with prescribed folder structure. Design Driven Dev is an agent skill from ericmjl/llamabot. Guide for design-driven development with prescribed folder structure.

When should I use Design Driven Dev?

Design Driven Dev fits situations like: tasks that involve File organization; tasks that involve Debugging.

How do I install Design Driven Dev in Claude Code?

Run `npx skills add ericmjl/llamabot --skill design-driven-dev -a claude-code`. Or copy the skill folder (.agents/skills/design-driven-dev in ericmjl/llamabot) into .claude/skills/design-driven-dev in your project. Claude Code loads it when a task matches its description.

How do I install Design Driven Dev in Codex?

Run `npx skills add ericmjl/llamabot --skill design-driven-dev -a codex`. Or copy the skill folder (.agents/skills/design-driven-dev in ericmjl/llamabot) into .agents/skills/design-driven-dev in your project. Codex loads it when a task matches its description.

Can I use Design Driven Dev in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add ericmjl/llamabot --skill design-driven-dev -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/design-driven-dev, .gemini/skills/design-driven-dev, .github/skills/design-driven-dev and .opencode/skills/design-driven-dev in your project.

What does Design Driven Dev need to run?

SKILL.md names no scripts, command-line tools or credentials: Design Driven Dev is instructions for the agent only.

Does Design Driven Dev access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Design Driven Dev safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Design Driven Dev use?

No licence was found for Design Driven Dev or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Design Driven Dev use?

About 2k tokens (SKILL.md is roughly 7.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 4.9k tokens, read only when the agent opens those files.

What are the alternatives to Design Driven Dev?

Skills that share tags, products or a category with Design Driven Dev: Trellis Session Insight (mindfold-ai/Trellis, 15k stars), Native Data Fetching (CherryHQ/cherry-studio-app, 4k stars), Debugging Executions (n8n-io/n8n, 207k stars) and Aoti Debug (pytorch/pytorch, 104k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Design Driven Dev?

ericmjl (a GitHub user) maintains it in ericmjl/llamabot, which has 182 GitHub stars. The repository holds 4 skills in this directory. The repository was last updated on October 7, 2026.

Source: ericmjl/llamabot on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.