The Interpreter's speak and record_gap tools took byte offsets the model
counted itself; on the Claude lane three of eight utterances came through
cut mid-word and one empty span reached invocation as a non-canonical
utterance and quarantined its cell. Both tools now take `source_quote`; the
harness locates the quote in the preserved prose and derives the span. A
quote not in the prose, empty, or padded is a translation gap at capture.
The invariant is unchanged: only words in the prose become speech.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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