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Agent skill

Revyl MCP Dev Loop

by RevylAI in RevylAI/revyl-cli

Optional MCP dev-first mobile loop for screenshot-observe-action execution.

No licenceAuto-check passedAgent Workflows

Install Revyl MCP Dev Loop

skills CLI
$ npx skills add RevylAI/revyl-cli --skill revyl-mcp-dev-loop -a claude-code

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

GitHub CLI
$ gh skill install RevylAI/revyl-cli revyl-mcp-dev-loop --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/RevylAI/revyl-cli.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/revyl-mcp-dev-loop .claude/skills/revyl-mcp-dev-loop && 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/

Facts

Skill name
revyl-mcp-dev-loop
GitHub stars
522
Token cost
~1.3k tokens
SKILL.md length
709 words
Files
2
Skills in repo
20
Repo updated
First seen
Licence
None found

At a glance

Optional MCP dev-first mobile loop for screenshot-observe-action execution.

  • Works in 2 steps: Start dev loop equivalent. → Execute screenshot-observe-action cycles.
  • Tasks that involve MCP servers
  • SKILL.md covers Default Operating Mode, Execution Guardrails, Setup Recovery and Interaction Loop
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Revyl MCP Dev Loop is an agent skill from RevylAI/revyl-cli. Optional MCP dev-first mobile loop for screenshot-observe-action execution. Not started by the Cursor plugin.

Its SKILL.md is about 1.3k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `agents/openai.yaml`).

It sits in Agent Workflows, covering MCP servers. It works with Model Context Protocol.

When your agent uses it

  • Tasks that involve MCP servers

Example prompts

  • “/revyl-mcp-dev-loop”

Workflow steps

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

  1. Start dev loop equivalent.
  2. Execute screenshot-observe-action cycles.

What it can do on your machine

Read from SKILL.md and the folder at commit a860206. 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

Revyl MCP Dev Loop loads about 1.3k tokens when it runs. Until then it costs about 32 tokens; SKILL.md has 709 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~32
When it runs · the whole SKILL.md, loaded when a task matches
~1.3k

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 709 words (~1,309 tokens).

“This skill is for users who opt into custom MCP. The Cursor plugin does not start an MCP server. Add a personal MCP entry with a literal command such as revyl or /usr/local/bin/revyl, never ${...}.”

— opening of SKILL.md by RevylAI
name
revyl-mcp-dev-loop

Read the full SKILL.md on GitHub

Files

SKILL.md and 1 other file in skills/revyl-mcp-dev-loop of RevylAI/revyl-cli.

  • SKILL.md
  • agents/openai.yaml

Open the folder on GitHubat commit a860206

Compare with similar skills

Revyl MCP Dev Loop 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.

Revyl MCP Dev Loop compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Revyl MCP Dev Loop this skillRevylAI/revyl-cli522—~1.3kAutomated safety check: PassNone
MCP Server Builderanthropics/skills180k64 repos~2.3kAutomated safety check: PassApache-2.0
MCP Server BuildershareAI-lab/learn-claude-code78k5 repos~1.2kAutomated safety check: PassMIT
MCP Integration for Pluginsanthropics/claude-plugins-official38k11 repos~3.1kAutomated safety check: PassApache-2.0
Fastmcp Client CLIPrefectHQ/fastmcp28k1 repos~823Automated safety check: PassApache-2.0
Crush Configurationcharmbracelet/crush29k—~3.7kAutomated safety check: PassCustom licence

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More from RevylAI/revyl-cli

All 20 skills in this repo

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  • Revyl Proof Automation

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  • Revyl CLI Auth Bypass

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  • Revyl CLI Analyze

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Works with

Categories

Questions about Revyl MCP Dev Loop

What does Revyl MCP Dev Loop do?

Optional MCP dev-first mobile loop for screenshot-observe-action execution. Revyl MCP Dev Loop is an agent skill from RevylAI/revyl-cli. Optional MCP dev-first mobile loop for screenshot-observe-action execution.

When should I use Revyl MCP Dev Loop?

Revyl MCP Dev Loop fits situations like: tasks that involve MCP servers.

How do I install Revyl MCP Dev Loop in Claude Code?

Run `npx skills add RevylAI/revyl-cli --skill revyl-mcp-dev-loop -a claude-code`. Or copy the skill folder (skills/revyl-mcp-dev-loop in RevylAI/revyl-cli) into .claude/skills/revyl-mcp-dev-loop in your project. Claude Code loads it when a task matches its description.

How do I install Revyl MCP Dev Loop in Codex?

Run `npx skills add RevylAI/revyl-cli --skill revyl-mcp-dev-loop -a codex`. Or copy the skill folder (skills/revyl-mcp-dev-loop in RevylAI/revyl-cli) into .agents/skills/revyl-mcp-dev-loop in your project. Codex loads it when a task matches its description.

Can I use Revyl MCP Dev Loop 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 RevylAI/revyl-cli --skill revyl-mcp-dev-loop -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/revyl-mcp-dev-loop, .gemini/skills/revyl-mcp-dev-loop, .github/skills/revyl-mcp-dev-loop and .opencode/skills/revyl-mcp-dev-loop in your project.

What does Revyl MCP Dev Loop need to run?

SKILL.md names no scripts, command-line tools or credentials: Revyl MCP Dev Loop is instructions for the agent only.

Does Revyl MCP Dev Loop 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 Revyl MCP Dev Loop 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 Revyl MCP Dev Loop use?

No licence was found for Revyl MCP Dev Loop or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Revyl MCP Dev Loop use?

About 1.3k tokens (SKILL.md is roughly 5.2k 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 Revyl MCP Dev Loop?

Skills that share tags, products or a category with Revyl MCP Dev Loop: MCP Server Builder (anthropics/skills, 180k stars), MCP Server Builder (shareAI-lab/learn-claude-code, 78k stars), MCP Integration for Plugins (anthropics/claude-plugins-official, 38k stars) and Fastmcp Client CLI (PrefectHQ/fastmcp, 28k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Revyl MCP Dev Loop?

RevylAI (a GitHub organization) maintains it in RevylAI/revyl-cli, which has 522 GitHub stars. The repository holds 20 skills in this directory. The repository was last updated on October 7, 2026.

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