Agent skill
by hashgraph-online in hashgraph-online/awesome-codex-plugins
A skill your agent uses when picking which kind of prototype to build for the question at hand — concept (exploratory), throwaway (testing one specific aspect), or evolutionary (incremental toward…
$ npx skills add hashgraph-online/awesome-codex-plugins --skill prototyping-concept-throwaway-evolutionary -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install hashgraph-online/awesome-codex-plugins prototyping-concept-throwaway-evolutionary --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/hashgraph-online/awesome-codex-plugins.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/HDeibler/universal-design-principles/plugins/process-and-robustness-principles/skills/prototyping-concept-throwaway-evolutionary .claude/skills/prototyping-concept-throwaway-evolutionary && 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 "prototyping-concept-throwaway-evolutionary" agent skill from https://github.com/hashgraph-online/awesome-codex-plugins/tree/main/plugins/HDeibler/universal-design-principles/plugins/process-and-robustness-principles/skills/prototyping-concept-throwaway-evolutionary into .claude/skills/prototyping-concept-throwaway-evolutionary/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "prototyping-concept-throwaway-evolutionary", 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/hashgraph-online/awesome-codex-plugins/tree/main/plugins/HDeibler/universal-design-principles/plugins/process-and-robustness-principles/skills/prototyping-concept-throwaway-evolutionaryType 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 hashgraph-online/awesome-codex-plugins --skill prototyping-concept-throwaway-evolutionary -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install hashgraph-online/awesome-codex-plugins prototyping-concept-throwaway-evolutionary --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hashgraph-online/awesome-codex-plugins.git skills-src && mkdir -p .agents/skills && cp -r skills-src/plugins/HDeibler/universal-design-principles/plugins/process-and-robustness-principles/skills/prototyping-concept-throwaway-evolutionary .agents/skills/prototyping-concept-throwaway-evolutionary && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "prototyping-concept-throwaway-evolutionary" agent skill from https://github.com/hashgraph-online/awesome-codex-plugins/tree/main/plugins/HDeibler/universal-design-principles/plugins/process-and-robustness-principles/skills/prototyping-concept-throwaway-evolutionary into .agents/skills/prototyping-concept-throwaway-evolutionary/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "prototyping-concept-throwaway-evolutionary", 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 hashgraph-online/awesome-codex-plugins --skill prototyping-concept-throwaway-evolutionary -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install hashgraph-online/awesome-codex-plugins prototyping-concept-throwaway-evolutionary --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hashgraph-online/awesome-codex-plugins.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/plugins/HDeibler/universal-design-principles/plugins/process-and-robustness-principles/skills/prototyping-concept-throwaway-evolutionary .cursor/skills/prototyping-concept-throwaway-evolutionary && 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 "prototyping-concept-throwaway-evolutionary" agent skill from https://github.com/hashgraph-online/awesome-codex-plugins/tree/main/plugins/HDeibler/universal-design-principles/plugins/process-and-robustness-principles/skills/prototyping-concept-throwaway-evolutionary into .cursor/skills/prototyping-concept-throwaway-evolutionary/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "prototyping-concept-throwaway-evolutionary", 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/hashgraph-online/awesome-codex-plugins.git --path plugins/HDeibler/universal-design-principles/plugins/process-and-robustness-principles/skills/prototyping-concept-throwaway-evolutionary--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 hashgraph-online/awesome-codex-plugins --skill prototyping-concept-throwaway-evolutionary -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install hashgraph-online/awesome-codex-plugins prototyping-concept-throwaway-evolutionary --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hashgraph-online/awesome-codex-plugins.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/plugins/HDeibler/universal-design-principles/plugins/process-and-robustness-principles/skills/prototyping-concept-throwaway-evolutionary .gemini/skills/prototyping-concept-throwaway-evolutionary && 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 "prototyping-concept-throwaway-evolutionary" agent skill from https://github.com/hashgraph-online/awesome-codex-plugins/tree/main/plugins/HDeibler/universal-design-principles/plugins/process-and-robustness-principles/skills/prototyping-concept-throwaway-evolutionary into .gemini/skills/prototyping-concept-throwaway-evolutionary/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "prototyping-concept-throwaway-evolutionary", 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 hashgraph-online/awesome-codex-plugins prototyping-concept-throwaway-evolutionaryInstalls 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 hashgraph-online/awesome-codex-plugins --skill prototyping-concept-throwaway-evolutionary -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/hashgraph-online/awesome-codex-plugins.git skills-src && mkdir -p .github/skills && cp -r skills-src/plugins/HDeibler/universal-design-principles/plugins/process-and-robustness-principles/skills/prototyping-concept-throwaway-evolutionary .github/skills/prototyping-concept-throwaway-evolutionary && 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 "prototyping-concept-throwaway-evolutionary" agent skill from https://github.com/hashgraph-online/awesome-codex-plugins/tree/main/plugins/HDeibler/universal-design-principles/plugins/process-and-robustness-principles/skills/prototyping-concept-throwaway-evolutionary into .github/skills/prototyping-concept-throwaway-evolutionary/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "prototyping-concept-throwaway-evolutionary", 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 hashgraph-online/awesome-codex-plugins --skill prototyping-concept-throwaway-evolutionary -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install hashgraph-online/awesome-codex-plugins prototyping-concept-throwaway-evolutionary --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hashgraph-online/awesome-codex-plugins.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/plugins/HDeibler/universal-design-principles/plugins/process-and-robustness-principles/skills/prototyping-concept-throwaway-evolutionary .opencode/skills/prototyping-concept-throwaway-evolutionary && 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 "prototyping-concept-throwaway-evolutionary" agent skill from https://github.com/hashgraph-online/awesome-codex-plugins/tree/main/plugins/HDeibler/universal-design-principles/plugins/process-and-robustness-principles/skills/prototyping-concept-throwaway-evolutionary into .opencode/skills/prototyping-concept-throwaway-evolutionary/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "prototyping-concept-throwaway-evolutionary", 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.
prototyping-concept-throwaway-evolutionaryA skill your agent uses when picking which kind of prototype to build for the question at hand — concept (exploratory), throwaway (testing one specific aspect), or evolutionary (incremental toward…
Prototyping Concept Throwaway Evolutionary is an agent skill from hashgraph-online/awesome-codex-plugins. Use this skill when picking which kind of prototype to build for the question at hand — concept (exploratory), throwaway (testing one specific aspect), or evolutionary (incremental toward final). Trigger when planning a research method, when scoping a technical spike, or when deciding whether an MVP should evolve or be thrown away. Sub-aspect of prototyping; read that first.
Its SKILL.md is about 760 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/three-kinds-cases.md`).
It sits in Development, covering Prototyping. The repository describes itself as: A curated list of awesome OpenAI Codex / ChatGPT plugins, skills, and resources. The 1 Codex Marketplace. See live plugins at: https://hol.org/plugins/best-codex-plugins. The licence is Apache-2.0.
3 steps, taken from the first numbered list in SKILL.md.
Read from SKILL.md and the folder at commit 9e7b281. It shows what the files ask for, not the result of running them.
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.
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.
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Prototyping Concept Throwaway Evolutionary loads about 760 tokens when it runs, and up to ~1.3k if it reads all its reference files. Until then it costs about 106 tokens; SKILL.md has 322 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.
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.
The full file from hashgraph-online/awesome-codex-plugins at commit 9e7b281, republished under its Apache-2.0 licence (© hashgraph-online). 322 words, ~760 tokens.
.claude/skills/prototyping-concept-throwaway-evolutionary/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.The book identifies three prototype kinds — concept, throwaway, evolutionary — each with characteristic uses, costs, and failure modes.
For exploring preliminary ideas. Quick, cheap, often disposable.
Use for: brainstorming sessions, early stakeholder alignment, exploring whether a direction is worth pursuing.
Examples: paper sketches, storyboards, mood boards, foam mockups, role-playing.
Failure mode: artificial reality problem. A skilled designer can make any concept look plausible; the prototype's polish doesn't predict actual workability.
For testing specific aspects of a design.
Use for: performance benchmarks, A/B tests, single-flow user studies, technical spikes.
Examples: standalone interactive demos, wind-tunnel models, isolated code experiments.
Failure mode: scaling and integration problem. A throwaway that works in isolation may fail when integrated or at scale.
For incrementally building toward the final design.
Use for: MVPs that grow into products, iterative startup development, products with uncertain requirements.
Examples: software MVPs, agile sprint outputs, lean startup builds.
Failure mode: tunnel vision. Iterations refine the current direction; teams may miss fundamentally better directions.
| Situation | Prototype kind |
|---|---|
| Exploring ideas; "is this worth doing?" | Concept |
| Testing one specific question | Throwaway |
| Iterating toward a final product | Evolutionary |
| Stakeholder alignment | Concept |
| Performance benchmark | Throwaway |
| Scaling a startup | Evolutionary |
The kinds aren't mutually exclusive. A typical project uses concept prototypes early (to align), throwaway prototypes mid (to test specifics), and evolutionary prototypes late (to ship and refine).
A common pattern:
Each kind catches different issues; using all three reduces the risk of any single failure mode.
© hashgraph-online, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
SKILL.md and 1 other file (references) in plugins/HDeibler/universal-design-principles/plugins/process-and-robustness-principles/skills/prototyping-concept-throwaway-evolutionary of hashgraph-online/awesome-codex-plugins.
Open the folder on GitHubat commit 9e7b281
Prototyping Concept Throwaway Evolutionary 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 |
|---|---|---|---|---|---|---|
| Prototyping Concept Throwaway Evolutionary this skillhashgraph-online/awesome-codex-plugins | 1.3k | — | ~760 | Automated safety check: Pass | Apache-2.0 | |
| Native Feel Cross Platform Desktopyetone/native-feel-skill | 1.9k | 1 repos | ~1.5k | Automated safety check: Pass | MIT | |
| Compound Engineering PrototypeEveryInc/compound-engineering-plugin | 25k | — | ~1.9k | Automated safety check: Pass | MIT | |
| Collaborating With CodexGuDaStudio/collaborating-with-codex | 132 | 1 repos | ~712 | Automated safety check: Pass | MIT | |
| Digikeyaklofas/kicad-happy | 1.4k | 1 repos | ~4.5k | Automated safety check: Pass | MIT | |
| Collaborating With Geminihaoyu-haoyu/Multi-AI-Workflow | 109 | — | ~521 | Automated safety check: Pass | MIT |
yetone/native-feel-skill
A skill your agent uses when the user is designing, prototyping, or rewriting a desktop app that must run on multiple OSes (macOS + Windows, optionally Linux) AND feel indistinguishable from a…
EveryInc/compound-engineering-plugin
Builds a throwaway prototype at just the fidelity needed to settle a specific how-it-should-work-or-feel question, before committing to an approach other work will treat as fixed.
GuDaStudio/collaborating-with-codex
Delegates coding tasks to Codex CLI for prototyping, debugging, and code review.
aklofas/kicad-happy
Search DigiKey for electronic components and download datasheets — primary source for prototype orders and the preferred API method for fetching datasheets.
haoyu-haoyu/Multi-AI-Workflow
Delegates coding tasks to Gemini CLI for prototyping, debugging, and code review.
adobe/spectrum-design-data
Look up Spectrum 2 (S2) component documentation, design guidelines, and usage patterns when building with React Spectrum or Spectrum Web Components.
hashgraph-online/awesome-codex-plugins
Create original anime-style reaction stickers as looping GIFs and MP4 previews, using generated character pose sheets and timed key poses.
hashgraph-online/awesome-codex-plugins
Manage and query Calibre libraries with the calibredb CLI (local paths or Calibre Content server URLs).
hashgraph-online/awesome-codex-plugins
A skill your agent uses when adding, changing, testing, or debugging Rust HTTP APIs and services, especially when Codex needs black-box integration tests, random-port app startup, real database test…
hashgraph-online/awesome-codex-plugins
Make a studio's game look like something at build time — a cover from a real frame of the game (free), painted covers, backdrops, textures and character plates from image models through the…
hashgraph-online/awesome-codex-plugins
Use CALL-E from Codex through the calle CLI. An agent skill from hashgraph-online/awesome-codex-plugins.
hashgraph-online/awesome-codex-plugins
Balance game difficulty, resources, rewards, probability, progression, economies, and dominant strategies.
Categories
A skill your agent uses when picking which kind of prototype to build for the question at hand — concept (exploratory), throwaway (testing one specific aspect), or evolutionary (incremental toward…. Prototyping Concept Throwaway Evolutionary is an agent skill from hashgraph-online/awesome-codex-plugins. Use this skill when picking which kind of prototype to build for the question at hand — concept (exploratory), throwaway (testing one specific aspect), or evolutionary (incremental toward final).
Prototyping Concept Throwaway Evolutionary fits situations like: picking which kind of prototype to build for the question at hand — concept (exploratory); throwaway (testing one specific aspect); evolutionary (incremental toward final); planning a research method.
Run `npx skills add hashgraph-online/awesome-codex-plugins --skill prototyping-concept-throwaway-evolutionary -a claude-code`. Or copy the skill folder (plugins/HDeibler/universal-design-principles/plugins/process-and-robustness-principles/skills/prototyping-concept-throwaway-evolutionary in hashgraph-online/awesome-codex-plugins) into .claude/skills/prototyping-concept-throwaway-evolutionary in your project. Claude Code loads it when a task matches its description.
Run `npx skills add hashgraph-online/awesome-codex-plugins --skill prototyping-concept-throwaway-evolutionary -a codex`. Or copy the skill folder (plugins/HDeibler/universal-design-principles/plugins/process-and-robustness-principles/skills/prototyping-concept-throwaway-evolutionary in hashgraph-online/awesome-codex-plugins) into .agents/skills/prototyping-concept-throwaway-evolutionary in your project. Codex loads it when a task matches its description.
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add hashgraph-online/awesome-codex-plugins --skill prototyping-concept-throwaway-evolutionary -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/prototyping-concept-throwaway-evolutionary, .gemini/skills/prototyping-concept-throwaway-evolutionary, .github/skills/prototyping-concept-throwaway-evolutionary and .opencode/skills/prototyping-concept-throwaway-evolutionary in your project.
SKILL.md names no scripts, command-line tools or credentials: Prototyping Concept Throwaway Evolutionary is instructions for the agent only.
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.
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.
Prototyping Concept Throwaway Evolutionary is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
About 760 tokens (SKILL.md is roughly 3k 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 561 tokens, read only when the agent opens those files.
Skills that share tags, products or a category with Prototyping Concept Throwaway Evolutionary: Native Feel Cross Platform Desktop (yetone/native-feel-skill, 1.9k stars), Compound Engineering Prototype (EveryInc/compound-engineering-plugin, 25k stars), Collaborating With Codex (GuDaStudio/collaborating-with-codex, 132 stars) and Digikey (aklofas/kicad-happy, 1.4k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
hashgraph-online (a GitHub organization) maintains it in hashgraph-online/awesome-codex-plugins, which has 1,255 GitHub stars. The repository holds 714 skills in this directory. The repository was last updated on October 9, 2026.
Source: hashgraph-online/awesome-codex-plugins on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.
