Proof of Typeface

know what your text actually wears — a face you asked for is not a face you got. Every verdict below is measured from pixels drawn in this browser, by a separate origin, and the gate believes no single tool.

The audit this came from

a container with 299 installed faces had zero faces claiming the name Arial; asking for Arial silently rendered Liberation Sans; a “Georgia” run fell to a different serif and wrapped 20% early. Every tool in that pipeline reported success.

Runs

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Blocking

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Waived by a person

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Page spill

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Proof origin

not yet audited

The one-pager

start here: click any run below to interrogate it · type to edit it

Page spill — fixed-height frame

real DOM overflow at real sizes · substitute faces: modelled chain

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Audit table

every number came back from the proof origin

scroll sideways for the remaining columns →

Truth drawer

no run selected

Export gate

blocked until proven, swapped, or waived by a person

Blocking

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Waived

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Proposed by agent

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Wrap-shift threshold (% of median right edge) — set by you, read by agents

export: certificate stamp only

Simulate agent

runs through window.__agent, exactly like ChatGPT or Chrome would

idle

Invocation log

Tools as the agent sees them

ChatGPT’s browser reads only the top-level tools; Chrome with the WebMCP flag also sees the proof origin’s own tools. The proof_* bridges relay to those so every agent can reach the evidence.

Proof lab

the origin that measures every verdict