OpenTUI Terminal Interfaces
cline/cline
Helps build terminal user interfaces with OpenTUI using its core imperative API or its React and Solid reconcilers, with references for layout, keyboard, animation and testing.
This skill provides guidance for implementing headless terminal interfaces that programmatically control shell sessions.
No licenceAuto-check passed
Install Headless Terminal
$ npx skills add lazyFrogLOL/Harness_Engineering --skill headless-terminal -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install lazyFrogLOL/Harness_Engineering headless-terminal --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/lazyFrogLOL/Harness_Engineering.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/headless-terminal .claude/skills/headless-terminal && 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 "headless-terminal" agent skill from https://github.com/lazyFrogLOL/Harness_Engineering/tree/master/skills/headless-terminal into .claude/skills/headless-terminal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "headless-terminal", 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/lazyFrogLOL/Harness_Engineering/tree/master/skills/headless-terminalType 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 lazyFrogLOL/Harness_Engineering --skill headless-terminal -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install lazyFrogLOL/Harness_Engineering headless-terminal --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/lazyFrogLOL/Harness_Engineering.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/headless-terminal .agents/skills/headless-terminal && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "headless-terminal" agent skill from https://github.com/lazyFrogLOL/Harness_Engineering/tree/master/skills/headless-terminal into .agents/skills/headless-terminal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "headless-terminal", 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 lazyFrogLOL/Harness_Engineering --skill headless-terminal -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install lazyFrogLOL/Harness_Engineering headless-terminal --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/lazyFrogLOL/Harness_Engineering.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/headless-terminal .cursor/skills/headless-terminal && 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 "headless-terminal" agent skill from https://github.com/lazyFrogLOL/Harness_Engineering/tree/master/skills/headless-terminal into .cursor/skills/headless-terminal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "headless-terminal", 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/lazyFrogLOL/Harness_Engineering.git --path skills/headless-terminal--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 lazyFrogLOL/Harness_Engineering --skill headless-terminal -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install lazyFrogLOL/Harness_Engineering headless-terminal --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/lazyFrogLOL/Harness_Engineering.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/headless-terminal .gemini/skills/headless-terminal && 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 "headless-terminal" agent skill from https://github.com/lazyFrogLOL/Harness_Engineering/tree/master/skills/headless-terminal into .gemini/skills/headless-terminal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "headless-terminal", 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 lazyFrogLOL/Harness_Engineering headless-terminalInstalls 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 lazyFrogLOL/Harness_Engineering --skill headless-terminal -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/lazyFrogLOL/Harness_Engineering.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/headless-terminal .github/skills/headless-terminal && 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 "headless-terminal" agent skill from https://github.com/lazyFrogLOL/Harness_Engineering/tree/master/skills/headless-terminal into .github/skills/headless-terminal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "headless-terminal", 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 lazyFrogLOL/Harness_Engineering --skill headless-terminal -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install lazyFrogLOL/Harness_Engineering headless-terminal --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/lazyFrogLOL/Harness_Engineering.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/headless-terminal .opencode/skills/headless-terminal && 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 "headless-terminal" agent skill from https://github.com/lazyFrogLOL/Harness_Engineering/tree/master/skills/headless-terminal into .opencode/skills/headless-terminal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "headless-terminal", 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
headless-terminal- GitHub stars
- 128
- Token cost
- ~2.1k tokens
- SKILL.md length
- 1,014 words
- Files
- 1
- Skills in repo
- 32
- Repo updated
- First seen
- Licence
- None found
At a glance
This skill provides guidance for implementing headless terminal interfaces that programmatically control shell sessions.
- Works in 5 steps: Understand the Interface Contract → Select the Underlying Library → Handle Shell Configuration → …
- Implementing terminal emulation
- SKILL.md covers Overview, Approach, Verification Strategies and Common Pitfalls, plus 1 more section
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Headless Terminal is an agent skill from lazyFrogLOL/Harness_Engineering. This skill provides guidance for implementing headless terminal interfaces that programmatically control shell sessions. Use this skill when implementing terminal emulation, pseudo-terminal wrappers,
Its SKILL.md is about 2.1k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
When your agent uses it
- Implementing terminal emulation
- Pseudo-terminal wrappers
Example prompts
- “/headless-terminal”
Workflow steps
5 steps, taken from the step headings in SKILL.md.
- Understand the Interface Contract
- Select the Underlying Library
- Handle Shell Configuration
- Implement Core Functionality
- Address Edge Cases
What it can do on your machine
Read from SKILL.md and the folder at commit cae3b25. 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.
Context cost
Headless Terminal loads about 2.1k tokens when it runs. Until then it costs about 54 tokens; SKILL.md has 1,014 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
Without a licence we can't republish the file, so here is its outline and opening line. It has 1,014 words (~2,062 tokens).
“This skill guides the implementation of headless terminal interfaces—programmatic wrappers that control shell sessions without a visible terminal UI. These implementations typically involve spawning shell processes, sending input (keystrokes, commands), and capturing output.”
- name
- headless-terminal
Files
Just SKILL.md in skills/headless-terminal of lazyFrogLOL/Harness_Engineering.
Open the folder on GitHubat commit cae3b25
Compare with similar skills
Headless Terminal 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 |
|---|---|---|---|---|---|---|
| Headless Terminal this skilllazyFrogLOL/Harness_Engineering | 128 | — | ~2.1k | Automated safety check: Pass | None | |
| OpenTUI Terminal Interfacescline/cline | 70k | — | ~1.9k | Automated safety check: Pass | Apache-2.0 | |
| Terminal Openeraffaan-m/ECC | 276k | — | ~635 | Automated safety check: Pass | MIT | |
| Network Interface Healthaffaan-m/ECC | 276k | 1 repos | ~1.4k | Automated safety check: Pass | MIT | |
| Terminal Opsaffaan-m/ECC | 276k | 2 repos | ~750 | Automated safety check: Pass | MIT | |
| Terminal Opsaffaan-m/ECC | 276k | — | ~439 | Automated safety check: Pass | MIT |
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Questions about Headless Terminal
What does Headless Terminal do?
This skill provides guidance for implementing headless terminal interfaces that programmatically control shell sessions. Headless Terminal is an agent skill from lazyFrogLOL/Harness_Engineering. This skill provides guidance for implementing headless terminal interfaces that programmatically control shell sessions.
When should I use Headless Terminal?
Headless Terminal fits situations like: implementing terminal emulation; pseudo-terminal wrappers.
How do I install Headless Terminal in Claude Code?
Run `npx skills add lazyFrogLOL/Harness_Engineering --skill headless-terminal -a claude-code`. Or copy the skill folder (skills/headless-terminal in lazyFrogLOL/Harness_Engineering) into .claude/skills/headless-terminal in your project. Claude Code loads it when a task matches its description.
How do I install Headless Terminal in Codex?
Run `npx skills add lazyFrogLOL/Harness_Engineering --skill headless-terminal -a codex`. Or copy the skill folder (skills/headless-terminal in lazyFrogLOL/Harness_Engineering) into .agents/skills/headless-terminal in your project. Codex loads it when a task matches its description.
Can I use Headless Terminal 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 lazyFrogLOL/Harness_Engineering --skill headless-terminal -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/headless-terminal, .gemini/skills/headless-terminal, .github/skills/headless-terminal and .opencode/skills/headless-terminal in your project.
What does Headless Terminal need to run?
SKILL.md names no scripts, command-line tools or credentials: Headless Terminal is instructions for the agent only.
Does Headless Terminal 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 Headless Terminal 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 Headless Terminal use?
No licence was found for Headless Terminal or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Headless Terminal use?
About 2.1k tokens (SKILL.md is roughly 8.2k 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 Headless Terminal?
Skills that share tags, products or a category with Headless Terminal: OpenTUI Terminal Interfaces (cline/cline, 70k stars), Terminal Opener (affaan-m/ECC, 276k stars), Network Interface Health (affaan-m/ECC, 276k stars) and Terminal Ops (affaan-m/ECC, 276k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Headless Terminal?
lazyFrogLOL (a GitHub user) maintains it in lazyFrogLOL/Harness_Engineering, which has 128 GitHub stars. The repository holds 32 skills in this directory. The repository was last updated on May 18, 2026.
Source: lazyFrogLOL/Harness_Engineering on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.