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fix(usage): clamp negative input token counts to zero

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Some OpenAI-format providers (via pi-ai) pre-subtract cached_tokens from
prompt_tokens upstream.  When cached_tokens exceeds prompt_tokens due to
provider inconsistencies the subtraction produces a negative input value
that flows through to the TUI status bar and /usage dashboard.

Clamp rawInput to 0 in normalizeUsage() so downstream consumers never
see nonsensical negative token counts.

Closes #30765

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
scoootscooob
2026-03-01 19:07:14 -08:00
committed by Peter Steinberger
parent 08c35eb13f
commit 20467d987d
2 changed files with 22 additions and 1 deletions
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6
src/agents/usage.ts
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@@ -90,9 +90,13 @@ export function normalizeUsage(raw?: UsageLike | null): NormalizedUsage | undefi
return undefined;
}
const input = asFiniteNumber(
// Some providers (pi-ai OpenAI-format) pre-subtract cached_tokens from
// prompt_tokens upstream. When cached_tokens > prompt_tokens the result is
// negative, which is nonsensical. Clamp to 0.
const rawInput = asFiniteNumber(
raw.input ?? raw.inputTokens ?? raw.input_tokens ?? raw.promptTokens ?? raw.prompt_tokens,
);
const input = rawInput !== undefined && rawInput < 0 ? 0 : rawInput;
const output = asFiniteNumber(
raw.output ??
raw.outputTokens ??