Identify
brycewang-stanford/Auto-Empirical-Research-Skills
Design or review identification strategy for the sewage-house-prices project.
STPA Step 1 - Define the purpose of analysis by identifying losses, hazards, and system-level constraints.
Custom licenceAuto-check passed
Install Stpa Step1 Define Purpose
$ npx skills add sandgardenhq/sgai --skill stpa-step1-define-purpose -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install sandgardenhq/sgai stpa-step1-define-purpose --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/sandgardenhq/sgai.git skills-src && mkdir -p .claude/skills && cp -r skills-src/cmd/sgai/skel/.sgai/skills/stpa/stpa-step1-define-purpose .claude/skills/stpa-step1-define-purpose && 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 "stpa-step1-define-purpose" agent skill from https://github.com/sandgardenhq/sgai/tree/main/cmd/sgai/skel/.sgai/skills/stpa/stpa-step1-define-purpose into .claude/skills/stpa-step1-define-purpose/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "stpa-step1-define-purpose", 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/sandgardenhq/sgai/tree/main/cmd/sgai/skel/.sgai/skills/stpa/stpa-step1-define-purposeType 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 sandgardenhq/sgai --skill stpa-step1-define-purpose -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install sandgardenhq/sgai stpa-step1-define-purpose --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sandgardenhq/sgai.git skills-src && mkdir -p .agents/skills && cp -r skills-src/cmd/sgai/skel/.sgai/skills/stpa/stpa-step1-define-purpose .agents/skills/stpa-step1-define-purpose && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "stpa-step1-define-purpose" agent skill from https://github.com/sandgardenhq/sgai/tree/main/cmd/sgai/skel/.sgai/skills/stpa/stpa-step1-define-purpose into .agents/skills/stpa-step1-define-purpose/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "stpa-step1-define-purpose", 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 sandgardenhq/sgai --skill stpa-step1-define-purpose -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install sandgardenhq/sgai stpa-step1-define-purpose --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sandgardenhq/sgai.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/cmd/sgai/skel/.sgai/skills/stpa/stpa-step1-define-purpose .cursor/skills/stpa-step1-define-purpose && 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 "stpa-step1-define-purpose" agent skill from https://github.com/sandgardenhq/sgai/tree/main/cmd/sgai/skel/.sgai/skills/stpa/stpa-step1-define-purpose into .cursor/skills/stpa-step1-define-purpose/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "stpa-step1-define-purpose", 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/sandgardenhq/sgai.git --path cmd/sgai/skel/.sgai/skills/stpa/stpa-step1-define-purpose--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 sandgardenhq/sgai --skill stpa-step1-define-purpose -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install sandgardenhq/sgai stpa-step1-define-purpose --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sandgardenhq/sgai.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/cmd/sgai/skel/.sgai/skills/stpa/stpa-step1-define-purpose .gemini/skills/stpa-step1-define-purpose && 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 "stpa-step1-define-purpose" agent skill from https://github.com/sandgardenhq/sgai/tree/main/cmd/sgai/skel/.sgai/skills/stpa/stpa-step1-define-purpose into .gemini/skills/stpa-step1-define-purpose/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "stpa-step1-define-purpose", 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 sandgardenhq/sgai stpa-step1-define-purposeInstalls 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 sandgardenhq/sgai --skill stpa-step1-define-purpose -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/sandgardenhq/sgai.git skills-src && mkdir -p .github/skills && cp -r skills-src/cmd/sgai/skel/.sgai/skills/stpa/stpa-step1-define-purpose .github/skills/stpa-step1-define-purpose && 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 "stpa-step1-define-purpose" agent skill from https://github.com/sandgardenhq/sgai/tree/main/cmd/sgai/skel/.sgai/skills/stpa/stpa-step1-define-purpose into .github/skills/stpa-step1-define-purpose/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "stpa-step1-define-purpose", 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 sandgardenhq/sgai --skill stpa-step1-define-purpose -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install sandgardenhq/sgai stpa-step1-define-purpose --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sandgardenhq/sgai.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/cmd/sgai/skel/.sgai/skills/stpa/stpa-step1-define-purpose .opencode/skills/stpa-step1-define-purpose && 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 "stpa-step1-define-purpose" agent skill from https://github.com/sandgardenhq/sgai/tree/main/cmd/sgai/skel/.sgai/skills/stpa/stpa-step1-define-purpose into .opencode/skills/stpa-step1-define-purpose/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "stpa-step1-define-purpose", 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
stpa-step1-define-purpose- GitHub stars
- 137
- Token cost
- ~1.2k tokens
- SKILL.md length
- 485 words
- Files
- 1
- Skills in repo
- 53
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
STPA Step 1 - Define the purpose of analysis by identifying losses, hazards, and system-level constraints.
- Works in 3 steps: Identify Losses (L) → Identify Hazards (H) → Define System-Level Constraints (SC)
- SKILL.md covers Objective, Announce at Start, Phase 1: Identify Losses (L) and Phase 2: Identify Hazards (H), plus 4 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Stpa Step1 Define Purpose is an agent skill from sandgardenhq/sgai. STPA Step 1 - Define the purpose of analysis by identifying losses, hazards, and system-level constraints. When beginning STPA analysis. After loading stpa/overview. When you need to establish what could go wrong and what must be prevented.
Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
The repository describes itself as: Sandgarden AI Software Factory.
Example prompts
- “/stpa-step1-define-purpose”
Workflow steps
3 steps, taken from the step headings in SKILL.md.
- Identify Losses (L)
- Identify Hazards (H)
- Define System-Level Constraints (SC)
What it can do on your machine
Read from SKILL.md and the folder at commit 9efbb7b. 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).
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
Stpa Step1 Define Purpose loads about 1.2k tokens when it runs. Until then it costs about 67 tokens; SKILL.md has 485 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 485 words (~1,239 tokens).
“Establish the foundation for the entire STPA analysis by identifying:”
- name
- stpa-step1-define-purpose
- metadata.tags
- stpa, safety, losses, hazards, constraints
Files
Just SKILL.md in cmd/sgai/skel/.sgai/skills/stpa/stpa-step1-define-purpose of sandgardenhq/sgai.
Open the folder on GitHubat commit 9efbb7b
Compare with similar skills
Stpa Step1 Define Purpose 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 |
|---|---|---|---|---|---|---|
| Stpa Step1 Define Purpose this skillsandgardenhq/sgai | 137 | — | ~1.2k | Automated safety check: Pass | Custom licence | |
| Identifybrycewang-stanford/Auto-Empirical-Research-Skills | 4.6k | — | ~1.3k | Automated safety check: Pass | Custom licence | |
| Define Loopyc-software/qm | 15k | — | ~1.6k | Automated safety check: Pass | MIT | |
| Identify Assumptions Existingphuryn/pm-skills | 27k | — | ~525 | Automated safety check: Pass | MIT | |
| Identify Assumptions Newphuryn/pm-skills | 27k | — | ~807 | Automated safety check: Pass | MIT | |
| Deploying Software Defined Perimetermukul975/Anthropic-Cybersecurity-Skills | 34k | — | ~1.9k | Automated safety check: Pass | Apache-2.0 |
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Questions about Stpa Step1 Define Purpose
What does Stpa Step1 Define Purpose do?
STPA Step 1 - Define the purpose of analysis by identifying losses, hazards, and system-level constraints. Stpa Step1 Define Purpose is an agent skill from sandgardenhq/sgai. STPA Step 1 - Define the purpose of analysis by identifying losses, hazards, and system-level constraints.
How do I install Stpa Step1 Define Purpose in Claude Code?
Run `npx skills add sandgardenhq/sgai --skill stpa-step1-define-purpose -a claude-code`. Or copy the skill folder (cmd/sgai/skel/.sgai/skills/stpa/stpa-step1-define-purpose in sandgardenhq/sgai) into .claude/skills/stpa-step1-define-purpose in your project. Claude Code loads it when a task matches its description.
How do I install Stpa Step1 Define Purpose in Codex?
Run `npx skills add sandgardenhq/sgai --skill stpa-step1-define-purpose -a codex`. Or copy the skill folder (cmd/sgai/skel/.sgai/skills/stpa/stpa-step1-define-purpose in sandgardenhq/sgai) into .agents/skills/stpa-step1-define-purpose in your project. Codex loads it when a task matches its description.
Can I use Stpa Step1 Define Purpose 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 sandgardenhq/sgai --skill stpa-step1-define-purpose -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/stpa-step1-define-purpose, .gemini/skills/stpa-step1-define-purpose, .github/skills/stpa-step1-define-purpose and .opencode/skills/stpa-step1-define-purpose in your project.
What does Stpa Step1 Define Purpose need to run?
SKILL.md names no scripts, command-line tools or credentials: Stpa Step1 Define Purpose is instructions for the agent only.
Does Stpa Step1 Define Purpose 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 Stpa Step1 Define Purpose 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 Stpa Step1 Define Purpose use?
Stpa Step1 Define Purpose 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 Stpa Step1 Define Purpose use?
About 1.2k tokens (SKILL.md is roughly 5k 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 Stpa Step1 Define Purpose?
Skills that share tags, products or a category with Stpa Step1 Define Purpose: Identify (brycewang-stanford/Auto-Empirical-Research-Skills, 4.6k stars), Define Loop (yc-software/qm, 15k stars), Identify Assumptions Existing (phuryn/pm-skills, 27k stars) and Identify Assumptions New (phuryn/pm-skills, 27k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Stpa Step1 Define Purpose?
sandgardenhq (a GitHub organization) maintains it in sandgardenhq/sgai, which has 137 GitHub stars. The repository holds 53 skills in this directory. The repository was last updated on September 21, 2026.
Source: sandgardenhq/sgai on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.