Agent skill

Preview Rostra

Use agent-browser to interact with Rostra's live development UI through accessibility snapshots, semantic controls, text entry, and screenshots.

No licenceAuto-check passedProductivity & Automation

Install Preview Rostra

skills CLI

$ npx skills add dpc/rostra --skill preview-rostra -a claude-code

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

GitHub CLI

$ gh skill install dpc/rostra preview-rostra --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/dpc/rostra.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/preview-rostra .claude/skills/preview-rostra && 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/

Paste into Claude Code

Install the "preview-rostra" agent skill from https://github.com/dpc/rostra/tree/master/.agents/skills/preview-rostra into .claude/skills/preview-rostra/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "preview-rostra", 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

$skill-installer install https://github.com/dpc/rostra/tree/master/.agents/skills/preview-rostra

Type 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.

skills CLI

$ npx skills add dpc/rostra --skill preview-rostra -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install dpc/rostra preview-rostra --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/dpc/rostra.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/preview-rostra .agents/skills/preview-rostra && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "preview-rostra" agent skill from https://github.com/dpc/rostra/tree/master/.agents/skills/preview-rostra into .agents/skills/preview-rostra/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "preview-rostra", 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.

skills CLI

$ npx skills add dpc/rostra --skill preview-rostra -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install dpc/rostra preview-rostra --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/dpc/rostra.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/preview-rostra .cursor/skills/preview-rostra && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "preview-rostra" agent skill from https://github.com/dpc/rostra/tree/master/.agents/skills/preview-rostra into .cursor/skills/preview-rostra/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "preview-rostra", 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

$ gemini skills install https://github.com/dpc/rostra.git --path .agents/skills/preview-rostra

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add dpc/rostra --skill preview-rostra -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install dpc/rostra preview-rostra --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/dpc/rostra.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/preview-rostra .gemini/skills/preview-rostra && rm -rf skills-src

Use ~/.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/

Paste into Gemini CLI

Install the "preview-rostra" agent skill from https://github.com/dpc/rostra/tree/master/.agents/skills/preview-rostra into .gemini/skills/preview-rostra/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "preview-rostra", 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.

GitHub CLI

$ gh skill install dpc/rostra preview-rostra

Installs 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).

skills CLI

$ npx skills add dpc/rostra --skill preview-rostra -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/dpc/rostra.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/preview-rostra .github/skills/preview-rostra && rm -rf skills-src

Use ~/.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/

Paste into GitHub Copilot

Install the "preview-rostra" agent skill from https://github.com/dpc/rostra/tree/master/.agents/skills/preview-rostra into .github/skills/preview-rostra/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "preview-rostra", 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.

skills CLI

$ npx skills add dpc/rostra --skill preview-rostra -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install dpc/rostra preview-rostra --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/dpc/rostra.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/preview-rostra .opencode/skills/preview-rostra && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "preview-rostra" agent skill from https://github.com/dpc/rostra/tree/master/.agents/skills/preview-rostra into .opencode/skills/preview-rostra/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "preview-rostra", 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: preview-rostra
GitHub stars: 110
Token cost: ~2.3k tokens
SKILL.md length: 852 words
Files: 3
Skills in repo: 1
Repo updated: Sep 24, 2026
First seen: Oct 7, 2026
Licence: None found

At a glance

Use agent-browser to interact with Rostra's live development UI through accessibility snapshots, semantic controls, text entry, and screenshots.

Works in 4 steps: Check http://[::1]:2345 first. Attach… → Choose a unique session name for the… → Run… → …
Tasks that involve Browser automation
SKILL.md covers Start safely, Inspect and interact, Screenshots and Existing development identity, plus 1 more section
Calls just

What it does

Preview Rostra is an agent skill from dpc/rostra. Use agent-browser to interact with Rostra's live development UI through accessibility snapshots, semantic controls, text entry, and screenshots.

Its SKILL.md is about 2.3k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `agent-browser.json`).

It sits in Productivity & Automation, covering Browser automation and Accessibility. The repository describes itself as: Rostra is a p2p (f2f) social network.

When your agent uses it

Tasks that involve Browser automation
Tasks that involve Accessibility

Example prompts

“/preview-rostra”

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

Check http://[::1]:2345 first. Attach when it is running. Otherwise ask the
Choose a unique session name for the task. Do not use the default session,
Run .agents/skills/preview-rostra/rostra-agent-browser session list. If the chosen name already exists,
Start on the literal loopback origin with output boundaries, a bounded output

What it can do on your machine

Read from SKILL.md and the folder at commit 7441286. 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
Shell commands in SKILL.md call:
- just
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

Preview Rostra loads about 2.3k tokens when it runs. Until then it costs about 40 tokens; SKILL.md has 852 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~40
When it runs · the whole SKILL.md, loaded when a task matches: ~2.3k

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 852 words (~2,317 tokens).

“Drive the live development UI through the policy wrapper .agents/skills/preview-rostra/rostra-agent-browser; use the full path in every command below. Read SECURITY.md before use. Before guessing syntax, load the version-matched upstream guide when needed:”

— opening of SKILL.md by dpc

name: preview-rostra
user-invocable: true

Read the full SKILL.md on GitHub

Files

SKILL.md and 2 other files in .agents/skills/preview-rostra of dpc/rostra.

SKILL.md
agent-browser.json
rostra-agent-browser

Open the folder on GitHubat commit 7441286

Compare with similar skills

Preview Rostra 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.

Preview Rostra compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Preview Rostra this skilldpc/rostra	110	—	~2.3k	Automated safety check: Pass	None	14 days ago
Gauntletanomalyco/browser-control	438	—	~1.1k	Automated safety check: Pass	MIT	yesterday
Kuri Serverjustrach/kuri	365	—	~6.2k	Automated safety check: Notes	Custom licence	2 mo ago
CLI Anything BrowserHKUDS/CLI-Anything	52k	—	~1.5k	Automated safety check: Warn	Apache-2.0	16 days ago
Bdgszymdzum/browser-debugger-cli	152	—	~2.5k	Automated safety check: Pass	MIT	yesterday
Vitemagnus919/agent-skills	111	—	~1.5k	Automated safety check: Notes	MIT	yesterday

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Questions about Preview Rostra

What does Preview Rostra do?

Use agent-browser to interact with Rostra's live development UI through accessibility snapshots, semantic controls, text entry, and screenshots. Preview Rostra is an agent skill from dpc/rostra. Use agent-browser to interact with Rostra's live development UI through accessibility snapshots, semantic controls, text entry, and screenshots.

When should I use Preview Rostra?

Preview Rostra fits situations like: tasks that involve Browser automation; tasks that involve Accessibility.

How do I install Preview Rostra in Claude Code?

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

How do I install Preview Rostra in Codex?

Run `npx skills add dpc/rostra --skill preview-rostra -a codex`. Or copy the skill folder (.agents/skills/preview-rostra in dpc/rostra) into .agents/skills/preview-rostra in your project. Codex loads it when a task matches its description.

Can I use Preview Rostra 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 dpc/rostra --skill preview-rostra -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/preview-rostra, .gemini/skills/preview-rostra, .github/skills/preview-rostra and .opencode/skills/preview-rostra in your project.

What does Preview Rostra need to run?

Going by SKILL.md and its folder, Preview Rostra needs the command-line tools its instructions call (just).

Does Preview Rostra 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 Preview Rostra 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 Preview Rostra use?

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

How many tokens does Preview Rostra use?

About 2.3k tokens (SKILL.md is roughly 9.3k 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 Preview Rostra?

Skills that share tags, products or a category with Preview Rostra: Gauntlet (anomalyco/browser-control, 438 stars), Kuri Server (justrach/kuri, 365 stars), CLI Anything Browser (HKUDS/CLI-Anything, 52k stars) and Bdg (szymdzum/browser-debugger-cli, 152 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Preview Rostra?

dpc (a GitHub user) maintains it in dpc/rostra, which has 110 GitHub stars. The repository was last updated on September 24, 2026.

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

Install Preview Rostra

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Files

Compare with similar skills

Similar skills

Gauntlet

Kuri Server

CLI Anything Browser

Bdg

Vite

Browser QA

Related

Questions about Preview Rostra