contextwindow

const (
	// DefaultOutputReserve is the fallback output token reserve.
	DefaultOutputReserve = 16_384
	// DefaultSafetyMargin is the fallback safety reserve.
	DefaultSafetyMargin = 8_192
	// DefaultProviderReserve is the fallback provider overhead reserve.
	DefaultProviderReserve = 2_048
	// ReservePercent caps the default output reserve as a percentage of context window.
	ReservePercent = 20
)

const (
	// SummaryReservePercent is the percentage of output reserve available to summaries.
	SummaryReservePercent = 80
	// DefaultUnknownModelSummaryMaxTokens limits summaries for models without a declared output limit.
	DefaultUnknownModelSummaryMaxTokens = 4_096
	// MinimumSummaryOutputTokens is the smallest viable summary output allowance.
	MinimumSummaryOutputTokens = 64
	// DefaultSummaryRequestEnvelopeTokens reserves request wrapper overhead.
	DefaultSummaryRequestEnvelopeTokens = 32
)

const (
	// ContributionSourceExtension is the default source for extension-provided context.
	ContributionSourceExtension = "extension"
	// ContributionRoleSystem is the default role for extension-provided context.
	ContributionRoleSystem = "system"
	// ContributionMaxTokens limits a single extension contribution.
	ContributionMaxTokens = 2048
	// ContributionAggregateMaxTokens limits all extension contributions in one context build.
	ContributionAggregateMaxTokens = 8192
	// BreakdownSystem is the token breakdown key for the base system prompt.
	BreakdownSystem = "system"
	// BreakdownSkills is the token breakdown key for available and active skills.
	BreakdownSkills = "skills"
	// BreakdownHistory is the token breakdown key for conversation history.
	BreakdownHistory = "history"
	// BreakdownExtensions is the token breakdown key for extension context.
	BreakdownExtensions = "extensions"
)

const (
	// MaxContributors is the maximum number of contributors exposed in usage diagnostics.
	MaxContributors = 8
)