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source dump of claude code
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3.2 kB · 92 lines
TypeScript
at main
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/** * Env var override for max output tokens. Returns undefined when unset/invalid * so the caller can fall through to the next precedence tier. */function getEnvMaxTokens(): number | undefined { const override = process.env.CLAUDE_CODE_FILE_READ_MAX_OUTPUT_TOKENS if (override) { const parsed = parseInt(override, 10) if (!isNaN(parsed) && parsed > 0) { return parsed } } return undefined}
export type FileReadingLimits = { maxTokens: number maxSizeBytes: number includeMaxSizeInPrompt?: boolean targetedRangeNudge?: boolean}
/** * Default limits for Read tool when the ToolUseContext doesn't supply an * override. Memoized so the GrowthBook value is fixed at first call — avoids * the cap changing mid-session as the flag refreshes in the background. * * Precedence for maxTokens: env var > GrowthBook > DEFAULT_MAX_OUTPUT_TOKENS. * (Env var is a user-set override, should beat experiment infrastructure.) * * Defensive: each field is individually validated; invalid values fall * through to the hardcoded defaults (no route to cap=0). */export const getDefaultFileReadingLimits = memoize((): FileReadingLimits => { const override = getFeatureValue_CACHED_MAY_BE_STALE<Partial<FileReadingLimits> | null>( 'tengu_amber_wren', {}, )
const maxSizeBytes = typeof override?.maxSizeBytes === 'number' && Number.isFinite(override.maxSizeBytes) && override.maxSizeBytes > 0 ? override.maxSizeBytes : MAX_OUTPUT_SIZE
const envMaxTokens = getEnvMaxTokens() const maxTokens = envMaxTokens ?? (typeof override?.maxTokens === 'number' && Number.isFinite(override.maxTokens) && override.maxTokens > 0 ? override.maxTokens : DEFAULT_MAX_OUTPUT_TOKENS)
const includeMaxSizeInPrompt = typeof override?.includeMaxSizeInPrompt === 'boolean' ? override.includeMaxSizeInPrompt : undefined
const targetedRangeNudge = typeof override?.targetedRangeNudge === 'boolean' ? override.targetedRangeNudge : undefined
return { maxSizeBytes, maxTokens, includeMaxSizeInPrompt, targetedRangeNudge, }})