# cssprobe-cli

Runtime CSS probe — inspect layout, overflow, scroll chains in a real browser. For AI agents.

- **Type:** MCP server
- **Trust:** 85/100 (A), scored on the package rubric
- **Verification:** verified (build provenance)
- **Version:** 0.3.0
- **Author:** io.github.mack-peng
- **License:** MIT
- **npm:** cssprobe-cli
- **Source:** https://github.com/mack-peng/cssprobe-cli
- **Compatible clients:** claude-code, cursor, copilot, gemini (basis: transport)

## Trust

85/100 (A), scored on the package rubric
- Publisher verified: no
- Build provenance: verified attestation
- npm trusted publishing (OIDC): yes
- Install scripts: nothing suspicious found
- Prompt-injection scan: not run
- Obfuscation scan: not run
- Evidence age: 18 days

## Security scan

- **Status:** clean
- **Scanned:** 2026-09-17T13:24:16.307Z
- **Version scanned:** 0.3.0
- **CVEs:** none found by OSV at scan time

## Tools

15 declared. Statically extracted from the shipped source — a floor on the surface, not a census.
- `core`
- `cssprobe`
- `export`
- `config`
- `skill`
- `cssprobe_open` — Open a browser session (non-blocking). Required before any inspect/layout/findings call.
- `cssprobe_inspect` — Inspect the runtime CSS of an element: DOM tree, computed styles, layout diagram and
- `cssprobe_tree` — Show the DOM tree structure under a selector.
- `cssprobe_layout` — Show the ASCII layout diagram (element positions and sizes) for a selector.
- `cssprobe_findings` — Show only issues/warnings/errors with confidence levels for a selector.
- `cssprobe_eval` — Evaluate a JavaScript expression in the browser page context and return the result.
- `cssprobe_screenshot` — Take a screenshot of the page and save it as a PNG file; returns the file path.
- `cssprobe_inject_css` — Inject CSS into the current page (useful for live experiments).
- `cssprobe_close` — Close the browser session. Pass all: true to close sessions across all workspaces.
- `cssprobe_status` — Show the current session status (alive / dead / none).

## Install

**Verdict: install** — No blocking findings and no open coverage gaps — safe to install as configured.
**Config** (claude-code):
```json
"{\n  \"mcpServers\": {\n    \"cssprobe-cli\": {\n      \"command\": \"npx\",\n      \"args\": [\n        \"-y\",\n        \"cssprobe-cli\"\n      ]\n    }\n  }\n}"
```

## Blast radius

Extensive to critical — no credential declaration found, from the publisher, the upstream registry, or the README. Known so far: runs commands; runs on your machine.
- Floor 43, ceiling 71 (tier: unknown)
- `unknown` means the floor and ceiling land in different bands — not measured enough to name one. It does not mean low.
- This is impact, not likelihood. A high radius is not a defect: a filesystem server is supposed to write files. It is never part of the trust score.

## Machine-readable views of this entry

- Signed JSON: https://forgeregistry.com/api/v1/packages/cssprobe-cli
- Install plan: https://forgeregistry.com/api/v1/packages/cssprobe-cli/install-plan
- Alternatives: https://forgeregistry.com/api/v1/alternatives/cssprobe-cli
- HTML page: https://forgeregistry.com/registry/cssprobe-cli
- MCP: POST https://forgeregistry.com/api/mcp → `forge_get_package` / `forge_install_plan`

## About this document

Generated by Forge (https://forgeregistry.com) — a compact rendering of the same record served, signed, at the JSON URL above. Trust and scan facts are the registry's own measurements; anything Forge did not measure is named as unmeasured rather than omitted.