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 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/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<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="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 3 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium MCP Rug Pull · line 37 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium Agent Snooping · line 45 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
- medium MCP Rug Pull · line 110 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
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 5.5 | $0.00055 | $0.00688 |
| Sonnet 5.5 | $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 1mo 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.
- 1mo 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 (1,465 stars, last pushed today), licensed Apache-2.0. It adds 137 tokens to every session and 1,721 once invoked, about $0.0005 per session on Opus 5.5. 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.