What is board-webmcp?

A skill for inspecting and editing a shared browser-based board through a local WebMCP connection.

Use it to list or change diagram nodes and edges on board.holon.run or a local board instance, including during a visible collaborative session.

It provides a defined way to read board nodes and connections and apply structured updates to a local or hosted board demo.

board-webmcp — Skill for Codex by holon-run/webmcp-bridge

Install

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.

Any agent

npx skills add holon-run/webmcp-bridge --skill board-webmcp

Clone the repo

git clone --depth 1 https://github.com/holon-run/webmcp-bridge

Made for: Codex.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/holon-run/webmcp-bridge/board-webmcp/github.svg)](https://agentmods.dev/skills/holon-run/webmcp-bridge/board-webmcp)

Your own site

<a href="https://agentmods.dev/skills/holon-run/webmcp-bridge/board-webmcp"><img src="https://agentmods.dev/badge/skills/holon-run/webmcp-bridge/board-webmcp/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/holon-run/webmcp-bridge/board-webmcp"><img src="https://agentmods.dev/badge/skills/holon-run/webmcp-bridge/board-webmcp.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 50 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 959 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00050	$0.00959
Opus 5.5	$0.00020	$0.00384
Sonnet 5.5	$0.00010	$0.00192
Haiku 4.5	$0.00005	$0.00096

Measured 2mo ago against content hash 1d9946495def, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

board-webmcp 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 2mo ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/ensure-links.sh, scripts/validate.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/board-webmcp/SKILL.md · 97 lines

How it starts

The opening of the file, as written. The whole thing — 97 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Board WebMCP

Use this skill to operate the native board demo through @webmcp-bridge/local-mcp.

Prerequisites

uxc is installed and available in PATH.
npx is installed and available in PATH.
Network access to https://board.holon.run.
On a fresh machine, or under an isolated HOME, install Playwright browsers first with npx playwright install.
For local board development, point the setup script at http://127.0.0.1:4173.

Core Workflow

Ensure the fixed board link exists:
- command -v board-webmcp-cli
- if missing or pointed at the wrong URL, run skills/board-webmcp/scripts/ensure-links.sh
Inspect the bridge and tool schema before calling tools:
- board-webmcp-cli -h
- board-webmcp-cli nodes.list -h
- board-webmcp-cli nodes.upsert -h
Read current board state:
- non-collaborative automation: board-webmcp-cli nodes.list, board-webmcp-cli edges.list
- collaborative visible session:
  - board-webmcp-cli bridge.session.mode.set '{"mode":"headed"}'
  - board-webmcp-cli bridge.open
  - board-webmcp-cli nodes.list
  - board-webmcp-cli edges.list
Apply updates with structured inputs:
- board-webmcp-cli diagram.export format=json
- collaborative visible session should keep the same runtime in headed
- board-webmcp-cli nodes.upsert '{"nodes":[{"label":"Fraud Service","kind":"service"}]}'
- board-webmcp-cli edges.upsert '{"edges":[{"sourceNodeId":"gateway","targetNodeId":"orders","protocol":"grpc"}]}'
- board-webmcp-cli layout.apply mode=layered
- board-webmcp-cli diagram.export format=json
When a human is editing or reviewing the same board live:
- check current state with board-webmcp-cli bridge.session.status
- if needed, switch to headed with board-webmcp-cli bridge.session.mode.set '{"mode":"headed"}'
- board-webmcp-cli bridge.open
- keep all reads and writes on board-webmcp-cli for that same collaborative session
- board-webmcp-cli selection.get
- board-webmcp-cli bridge.close
- if the human closed the board window manually, the headed owner session has ended; run board-webmcp-cli bridge.open again to start a new headed session on the same profile

Read the full file on GitHub · 97 lines

Files

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.

Changes

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.

2mo ago First seen · 97 lines · 50 tokens per session scan A 1d9946495def

Subscribe to this mod's changes

board-webmcp is a skill published in the GitHub repository holon-run/webmcp-bridge (28 stars, last pushed 6mo ago), licensed MIT. It adds 50 tokens to every session and 959 once invoked, about $0.0002 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.

Browser automation ai-agent browser-automation browser-tools mcp model-context-protocol playwright

board-webmcp next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
board-webmcpholon-run/webmcp-bridge	Skill	28	6mo ago	MIT	A	50	Codex
browsebrowserbase/stagehand	Skill	26k	yesterday	MIT	A	109	Claude Code
moli-webfetchlexmount/moli	Skill	23k	yesterday	Apache-2.0	A	90	Codex
moli-websearchlexmount/moli	Skill	23k	yesterday	Apache-2.0	A	49	Codex
moli-cdp-serverlexmount/moli	Skill	23k	yesterday	Apache-2.0	A	74	Codex
stagehand-facadebrowserbase/stagehand	Skill	26k	yesterday	MIT	A	42	Claude Code, Codex
webcmd-browseragentrhq/webcmd	Skill	2.8k	17d ago	Apache-2.0	A	30	Claude Code