fix(discord): bound component labels by UTF-16 units - #60113
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This was referenced Jul 7, 2026
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This was referenced Jul 7, 2026
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Summary
Discord component labels (model picker select options, clarify choice buttons) are now truncated by UTF-16 code units — the unit Discord actually enforces — instead of Python code-point slices, so emoji-heavy labels can no longer exceed Discord's component field budgets and 400 the interaction.
Salvage of #54969 by @ooiuuii, cherry-picked onto current main with authorship preserved. Fixes #54968.
Changes
plugins/platforms/discord/adapter.py: model-picker select labels/values and clarify button labels routed through the existingutf16_len/_prefix_within_utf16_limithelpers fromgateway/platforms/base.py; word/soft-boundary truncation behavior preservedtests/gateway/test_discord_model_picker.py,tests/gateway/test_discord_clarify_buttons.py: emoji-heavy regression coverageValidation
[:100]→ 160 units, over budgetTargeted suites green; truncation math verified with real imports (no surrogate-pair splits).
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