[trissim]

Enumerate labels and values together

P181 introduced an N-squared dropdown path: ChoicesEditor asked for every label separately, and AdvertisedChoices rebuilt/scanned the whole advertisement for each label.

AnnotationChoices now supplies a one-pass labelled_choices boundary for generic consumers. LabelledChoices supplies inherited value/label operations for sources that already own paired data; Toad's advertisement metadata implements only that original pair enumeration. The shared editor consumes the pairs directly, with no second registry or cache. Reverse-label decoding also enumerates once.

Native application and source review; one direct SDK-advertisement check covers pair order, values, labels and reverse lookup. No suite or profiling. Paired python-introspect and Toad source changes ship together through the ordinary tracked-main installer.

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[github-actions]

debt-src at c2bffc1 blocks on 4 lines:

grew TypeErrors:src/toad/acp/agent_configuration.py +1
grew TypeErrors:src/toad/forms/editors.py +1
found TypeErrors:src/toad/acp/agent_configuration.py at src/toad/acp/agent_configuration.py:21 (Module "python_introspect.choices" has no attribute "LabelledChoices"  [attr-defined])
found TypeErrors:src/toad/forms/editors.py at src/toad/forms/editors.py:289 ("AnnotationChoices" has no attribute "labelled_choices"  [attr-defined])

Warn-only, never blocks (2)

src/toad/acp/agent_configuration.py: LintFindings +1
found LintFindings:src/toad/acp/agent_configuration.py at src/toad/acp/agent_configuration.py:2 (I001 [*] Import block is un-sorted or un-formatted)