Write or revise interface labels, errors, empty states, and confirmation text from actual product behavior. Use for UI microcopy with clear next actions, preserved localization tokens, and explicit length constraints.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Write interface copy
Identify the surface, user action, current state, actual failure or success, and available next actions. Inspect the relevant UI and handlers when available. A button label must describe what clicking it does; an error message must not imply an action the product cannot perform.
Preserve string keys, interpolation tokens, markup, accessible names, and plural syntax unless the user explicitly includes a structural change. For ICU or another message format, inspect the format before editing branches. Ask about an unknown product behavior when it determines whether the copy would be misleading; style choices usually do not need clarification.
For errors, explain the actionable problem without blaming the user and give a supported recovery step. For an empty state, explain what belongs there and how to add it. For an irreversible action, make its actual consequence clear. Do not add guarantees about stored, recovered, or deleted data without implementation evidence.
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The line at the top of this page pins the label git:20261016.b181819, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
GET https://markdownregistry.com/api/v1/artifacts/art_kalilsddikw2jacl
GET https://markdownregistry.com/api/v1/resolve?ref=00200200/maintainer-skills-lab/mkl-write-ux-copy
GET https://markdownregistry.com/api/v1/blob/0fc4c1901b55ba80affbebc4a0a9f1af17c7b6e646dc3fa11618c8d1f9a96769
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