CLI Agent Orchestrator is a tool that coordinates multiple AI coding command-line programs by running them as separate workers in isolated terminal sessions. A supervisor uses it to delegate software tasks to specialist agents in parallel or in sequence while the workers retain their normal command-line capabilities. The catalogue skills operate this orchestration workflow.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/awslabs/cli-agent-orchestrator/mcp-apps-buildernpx skills add awslabs/cli-agent-orchestrator --skill mcp-apps-buildergit clone --depth 1 https://github.com/awslabs/cli-agent-orchestratorWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/awslabs/cli-agent-orchestrator/mcp-apps-builder)<a href="https://agentmods.dev/skills/awslabs/cli-agent-orchestrator/mcp-apps-builder"><img src="https://agentmods.dev/badge/skills/awslabs/cli-agent-orchestrator/mcp-apps-builder.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00137 | $0.01721 |
| Opus 5 | $0.00068 | $0.00860 |
| Sonnet 5 | $0.00027 | $0.00344 |
| Haiku 4.5 | $0.00014 | $0.00172 |
Grade A, and why
mcp-apps-builder scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 114 lines — stays where its author put it; the contents beside it link to each section on GitHub.
MCP Apps Builder (ext-apps Agent Skills bridge)
The Model Context Protocol ext-apps
repo ships four official Agent Skills that teach an AI coding agent how to
build MCP Apps
(SEP-1865 — interactive ui:// UIs that render inside a chat host). This skill
tells you when to reach for them and how to install them, so MCP App work is
done with the canonical, up-to-date guidance instead of guesswork.
The four builder skills
| Skill | Use it when… |
|---|---|
create-mcp-app |
Scaffolding a new MCP App (server + interactive UI) from scratch. |
add-app-to-server |
Adding an interactive ui:// view to an existing MCP server's tools. |
migrate-oai-app |
Converting an existing OpenAI Apps SDK app to MCP Apps. |
convert-web-app |
Turning an existing web app into a hybrid web + MCP App. |
Install / load them
Pick whichever matches the agent you're driving (skills live in the agent's skills directory — install once, then ask the agent to build):
- Claude Code (plugin marketplace):
/plugin marketplace add modelcontextprotocol/ext-apps /plugin install mcp-apps@modelcontextprotocol-ext-apps - Any agent (Vercel Skills CLI):
npx skills add modelcontextprotocol/ext-apps - Manual (clone + copy into the agent's skills dir):
Skills dirs by agent: Kiro CLIgit clone https://github.com/modelcontextprotocol/ext-apps.git cp -r ext-apps/plugins/mcp-apps/skills/create-mcp-app ~/.kiro/skills/create-mcp-app # …repeat for add-app-to-server / migrate-oai-app / convert-web-app~/.kiro/skills/, Claude Code~/.claude/skills/, VS Code/Copilot~/.copilot/skills/, Gemini CLI~/.gemini/skills/, Codex~/.codex/skills/, Cursor~/.cursor/skills/, Goose~/.config/goose/skills/. Verify with: ask the agent "what skills do you have?"
What ships with it
4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 6d ago First seen · 114 lines · 137 tokens per session scan A 87f4d9c88033
mcp-apps-builder is a skill published in the GitHub repository awslabs/cli-agent-orchestrator (1,213 stars, last pushed today), licensed Apache-2.0. It adds 137 tokens to every session and 1,721 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
tool-selection
Internal guidance for choosing between agent-rack's sync and background execution tools, and when to use per-agent shortcuts. Use whenever delegating a task to a claude/codex/opencode/Antigravity/custom sub-agent through agent-rack.
review
Run a structured, read-only code review through agent-rack's agentreview tool.
session-send
Send follow-up input to a running background agent-rack session.
review-handling
Internal guidance for presenting agent-rack's agentreview output back to the user. Use whenever an agentreview call (foreground or via agentsessionstatus) returns a result.
run
Run a one-shot task synchronously with a named CLI sub-agent via agent-rack.
session-logs
Read the raw stdout/stderr event stream from a background agent-rack session.