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 dcc-mcp/dcc-mcp-core --skill ui-controlgit clone --depth 1 https://github.com/dcc-mcp/dcc-mcp-coreWrote 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/dcc-mcp/dcc-mcp-core/ui-control)<a href="https://agentmods.dev/skills/dcc-mcp/dcc-mcp-core/ui-control"><img src="https://agentmods.dev/badge/skills/dcc-mcp/dcc-mcp-core/ui-control.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 | $0.00084 | $0.01738 |
| Opus 5 | $0.00042 | $0.00869 |
| Sonnet 5 | $0.00017 | $0.00348 |
| Haiku 4.5 | $0.00008 | $0.00174 |
Grade A, and why
ui-control 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 yesterday.
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 — 159 lines — stays where its author put it; the contents beside it link to each section on GitHub.
DCC UI Control
Use application UI automation only when a typed DCC skill, host API, or adapter
script reports unsupported or capability_missing. Policy denial, user
interruption, authentication, and desktop unavailability are stop conditions.
Backend order
- Use a typed DCC-MCP tool whenever one exists.
- For Chrome, Edge, launchers, and embedded webviews with DevTools access, set
DCC_MCP_UI_CONTROL_BACKEND=chrome(oredge) and use CDP. - For native application UI, set
DCC_MCP_UI_CONTROL_BACKEND=cuaand use the standalonedcc-cuaCLI/Host. mockis an explicit deterministic test backend only; production defaults todcc-cuaand never silently falls back to mock automation.
Core does not package an automation Host in its own release assets. The official
CLI installer reconciles the independently released dcc-cua companion; verify
it with dcc-mcp-cli components status dcc-cua or repair it with
dcc-mcp-cli components ensure dcc-cua --yes. For custom layouts, install
dcc-cua 0.4.0 or newer separately. Core probes the configured
DCC_MCP_INSTALL_DIR, the platform's standard dcc-mcp bin directory,
versioned standalone installs, and then PATH; set DCC_MCP_CUA_BINARY to an
absolute executable path only for a custom location. Core validates
dcc-cua manifest, ensures the shared Host, and keeps one
persistent JSONL bridge per active UI session. It prefers shared-memory image
transport when the native Core extension is present and otherwise uses bounded
binary attachments.
The CUA Host owns native accessibility, capture, banner/border/cursor markers, input scheduling, Escape interruption, browser CDP routing, and platform adapters. Core owns only DCC policy, normalized tool results, audit events, and artifact publication.
Exact application scope
DccServerBase injects its trusted DccServerOptions process/window context
into every in-process ui-control call. Dedicated or custom servers may
override that automatic binding with:
What ships with it
17 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.
- scripts/_backend.py 25 KB runs code
- scripts/_cdp_runtime.py 20 KB runs code
- scripts/_chrome_backend.py 29 KB runs code
- scripts/_cua_backend.py 36 KB runs code
- scripts/_cua_cli_host_client.py 13 KB runs code
- scripts/_cua_support.py 20 KB runs code
- scripts/_entrypoint.py 16 KB runs code
- scripts/_scenario.py 31 KB runs code
- scripts/act.py 390 B runs code
- scripts/find.py 395 B runs code
- scripts/recording_start.py 441 B runs code
- scripts/recording_state.py 446 B runs code
- scripts/recording_stop.py 435 B runs code
- scripts/snapshot.py 415 B runs code
- scripts/stop_computer_use.py 460 B runs code
- scripts/wait_for.py 415 B runs code
- tools.yaml 20 KB
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.
- yesterday Changed · +5 lines 2410b9185806
- 6d ago First seen · 154 lines · 84 tokens per session scan A b9a36724e93b
ui-control is a skill published in the GitHub repository dcc-mcp/dcc-mcp-core (42 stars, last pushed 2d ago), licensed MIT. It adds 84 tokens to every session and 1,738 once invoked, about $0.0004 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.
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