Ss Spec
Serial-Studio/Serial-Studio
Phase 1 of Serial Studio's spec-driven workflow: capture WHAT a feature must do and WHY, with no implementation detail.
Implements the Spec-Driven Development lifecycle (Intent, Requirements, Design, Tasks, Build) for structured feature development.
Install Sdd
$ npx skills add meleantonio/awesome-econ-ai-stuff --skill sdd -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install meleantonio/awesome-econ-ai-stuff sdd --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/meleantonio/awesome-econ-ai-stuff.git skills-src && mkdir -p .claude/skills && cp -r skills-src/_skills/engineering/sdd .claude/skills/sdd && rm -rf skills-srcUse ~/.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/
Install the "sdd" agent skill from https://github.com/meleantonio/awesome-econ-ai-stuff/tree/main/_skills/engineering/sdd into .claude/skills/sdd/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "sdd", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/meleantonio/awesome-econ-ai-stuff/tree/main/_skills/engineering/sddType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add meleantonio/awesome-econ-ai-stuff --skill sdd -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install meleantonio/awesome-econ-ai-stuff sdd --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/meleantonio/awesome-econ-ai-stuff.git skills-src && mkdir -p .agents/skills && cp -r skills-src/_skills/engineering/sdd .agents/skills/sdd && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "sdd" agent skill from https://github.com/meleantonio/awesome-econ-ai-stuff/tree/main/_skills/engineering/sdd into .agents/skills/sdd/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "sdd", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add meleantonio/awesome-econ-ai-stuff --skill sdd -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install meleantonio/awesome-econ-ai-stuff sdd --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/meleantonio/awesome-econ-ai-stuff.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/_skills/engineering/sdd .cursor/skills/sdd && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "sdd" agent skill from https://github.com/meleantonio/awesome-econ-ai-stuff/tree/main/_skills/engineering/sdd into .cursor/skills/sdd/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "sdd", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/meleantonio/awesome-econ-ai-stuff.git --path _skills/engineering/sdd--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add meleantonio/awesome-econ-ai-stuff --skill sdd -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install meleantonio/awesome-econ-ai-stuff sdd --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/meleantonio/awesome-econ-ai-stuff.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/_skills/engineering/sdd .gemini/skills/sdd && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "sdd" agent skill from https://github.com/meleantonio/awesome-econ-ai-stuff/tree/main/_skills/engineering/sdd into .gemini/skills/sdd/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "sdd", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install meleantonio/awesome-econ-ai-stuff sddInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add meleantonio/awesome-econ-ai-stuff --skill sdd -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/meleantonio/awesome-econ-ai-stuff.git skills-src && mkdir -p .github/skills && cp -r skills-src/_skills/engineering/sdd .github/skills/sdd && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "sdd" agent skill from https://github.com/meleantonio/awesome-econ-ai-stuff/tree/main/_skills/engineering/sdd into .github/skills/sdd/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "sdd", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add meleantonio/awesome-econ-ai-stuff --skill sdd -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install meleantonio/awesome-econ-ai-stuff sdd --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/meleantonio/awesome-econ-ai-stuff.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/_skills/engineering/sdd .opencode/skills/sdd && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "sdd" agent skill from https://github.com/meleantonio/awesome-econ-ai-stuff/tree/main/_skills/engineering/sdd into .opencode/skills/sdd/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "sdd", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
sdd- GitHub stars
- 645
- Used in
- 1 other repo
- Token cost
- ~963 tokens
- SKILL.md length
- 387 words
- Files
- 7
- Skills in repo
- 14
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Implements the Spec-Driven Development lifecycle (Intent, Requirements, Design, Tasks, Build) for structured feature development.
- Works in 3 steps: Clarity before Code: Never generate code… → Iterative Refinement: Loop through Req →… → Code via Docs: The truth is in the…
- The user wants to scaffold a new feature spec
- SKILL.md covers Core Philosophy, Commands, EARS Quick Reference and Design Checklist, plus 2 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Sdd is an agent skill from meleantonio/awesome-econ-ai-stuff. Implements the Spec-Driven Development lifecycle (Intent, Requirements, Design, Tasks, Build) for structured feature development. Use when the user wants to scaffold a new feature spec, generate EARS requirements, create a technical design, break work into tasks, or check spec status. Trigger on keywords: sdd, spec-driven, ears requirements, feature spec.
Its SKILL.md is about 960 tokens, which your agent loads only when the skill is triggered. The skill folder holds 9 other files (for example `index.md`, `reference.md` and `templates/spec/design.md`). Compatibility notes: ["claude-code","cursor","codex","gemini-cli"]
It sits in Development, covering Spec-driven development and PRD writing. The repository describes itself as: AI Skills for Economists.
When your agent uses it
- The user wants to scaffold a new feature spec
- Generate EARS requirements
- Create a technical design
- Break work into tasks
Example prompts
- “Use the sdd skill to implement the Spec-Driven Development lifecycle (Intent, Requirements, Design, Tasks, Build) for structured feature development”
- “/sdd”
Requirements
- Compatibility (from SKILL.md): ["claude-code","cursor","codex","gemini-cli"]
Workflow steps
3 steps, taken from the first numbered list in SKILL.md.
- Clarity before Code: Never generate code until requirements and design are approved.
- Iterative Refinement: Loop through Req → Design → Tasks until solid.
- Code via Docs: The truth is in the markdown files, not the chat.
What it can do on your machine
Read from SKILL.md and the folder at commit dd890d5. 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.
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.
Compatibility
["claude-code","cursor","codex","gemini-cli"]
From compatibility in the SKILL.md frontmatter.
Context cost
Sdd loads about 963 tokens when it runs. Until then it costs about 90 tokens; SKILL.md has 387 words of instructions outside code blocks.
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
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 387 words (~963 tokens).
“Execute in the project root (where spec/ and steering/ live).”
- name
- sdd
- compatibility
- ["claude-code","cursor","codex","gemini-cli"]
- workflow_stage
- engineering
- author
- Awesome Econ AI Community
- version
- 1.0.0
- tags
- spec-driven-development, requirements, design, documentation
Files
SKILL.md and 6 other files in _skills/engineering/sdd of meleantonio/awesome-econ-ai-stuff.
- SKILL.md
- index.md
- reference.md
- templates/spec/design.md
- templates/spec/requirements.md
- templates/spec/tasks.md
- templates/steering/coding-standards.md
Open the folder on GitHubat commit dd890d5
Used in 1 other repository
We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in meleantonio/awesome-econ-ai-stuff, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Sdd 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Sdd this skillmeleantonio/awesome-econ-ai-stuff | 645 | 1 repos | ~963 | Automated safety check: Pass | Custom licence | |
| Ss SpecSerial-Studio/Serial-Studio | 7.2k | — | ~766 | Automated safety check: Pass | Custom licence | |
| Speckit Clarifykunstmusik/blue | 154 | 17 repos | ~4.9k | Automated safety check: Pass | GPL-3.0 | |
| Spec-Driven Developmentaddyosmani/agent-skills | 103k | 1 repos | ~3.2k | Automated safety check: Pass | MIT | |
| Oft Spec Driven Developmentitsallcode/openfasttrace | 197 | — | ~2k | Automated safety check: Pass | GPL-3.0 | |
| Specwarpdotdev-demos/cloud-factory-demo | 330 | — | ~2.1k | Automated safety check: Pass | MIT |
Similar skills
Speckit Clarify
kunstmusik/blue
Identify underspecified areas in the current feature spec by asking up to 5 highly targeted clarification questions and encoding answers back into the spec.
Spec-Driven Development
addyosmani/agent-skills
Writes a structured specification before any code, moving through gated specify, plan, tasks and implement phases, with an optional capability map for multi-part requests.
Oft Spec Driven Development
itsallcode/openfasttrace
Support spec-driven development in projects that use OpenFastTrace, a system-requirements document in doc/systemrequirements.md, an arc42-style design in doc/design.md, and per-issue task plans in…
Spec
warpdotdev-demos/cloud-factory-demo
Coordinate spec-driven development for a GitHub, Jira, Linear, or other issue-tracker issue marked ready-to-spec by using write-product-spec and write-tech-spec, creating PRODUCT.md and TECH.md…
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Categories
Questions about Sdd
What does Sdd do?
Implements the Spec-Driven Development lifecycle (Intent, Requirements, Design, Tasks, Build) for structured feature development. Sdd is an agent skill from meleantonio/awesome-econ-ai-stuff. Implements the Spec-Driven Development lifecycle (Intent, Requirements, Design, Tasks, Build) for structured feature development.
When should I use Sdd?
Sdd fits situations like: the user wants to scaffold a new feature spec; generate EARS requirements; create a technical design; break work into tasks.
How do I install Sdd in Claude Code?
Run `npx skills add meleantonio/awesome-econ-ai-stuff --skill sdd -a claude-code`. Or copy the skill folder (_skills/engineering/sdd in meleantonio/awesome-econ-ai-stuff) into .claude/skills/sdd in your project. Claude Code loads it when a task matches its description.
How do I install Sdd in Codex?
Run `npx skills add meleantonio/awesome-econ-ai-stuff --skill sdd -a codex`. Or copy the skill folder (_skills/engineering/sdd in meleantonio/awesome-econ-ai-stuff) into .agents/skills/sdd in your project. Codex loads it when a task matches its description.
Can I use Sdd 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 meleantonio/awesome-econ-ai-stuff --skill sdd -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/sdd, .gemini/skills/sdd, .github/skills/sdd and .opencode/skills/sdd in your project.
What does Sdd need to run?
SKILL.md names no scripts, command-line tools or credentials: Sdd is instructions for the agent only. Compatibility (from SKILL.md): ["claude-code","cursor","codex","gemini-cli"].
Does Sdd 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 Sdd 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 Sdd use?
Sdd has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Sdd use?
About 963 tokens (SKILL.md is roughly 3.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Sdd?
Skills that share tags, products or a category with Sdd: Ss Spec (Serial-Studio/Serial-Studio, 7.2k stars), Speckit Clarify (kunstmusik/blue, 154 stars), Spec-Driven Development (addyosmani/agent-skills, 103k stars) and Oft Spec Driven Development (itsallcode/openfasttrace, 197 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Sdd?
meleantonio (a GitHub user) maintains it in meleantonio/awesome-econ-ai-stuff, which has 645 GitHub stars. The repository holds 14 skills in this directory. The repository was last updated on September 26, 2026.
Source: meleantonio/awesome-econ-ai-stuff on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.