ea29e5ebb8
Pure-function Policy{Floor,Ceil} with Decide(*float64, uint64) Decision.
Rules in priority order: nil → local; ≥floor → local; <ceil → claude;
sample band → low bit of requestHash.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
48 lines
1.1 KiB
Go
48 lines
1.1 KiB
Go
package routing
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// Decision is the route picked for a single skill call.
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type Decision int
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const (
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DecideLocal Decision = iota
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DecideClaude
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)
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func (d Decision) String() string {
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if d == DecideLocal {
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return "local"
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}
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return "claude"
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}
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// Policy holds the floor/ceil thresholds for routing decisions.
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//
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// Rules (in order):
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//
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// 1. passRate == nil → DecideLocal (default-to-local for cost-routable skills)
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// 2. *passRate >= Floor → DecideLocal (trust local)
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// 3. *passRate < Ceil → DecideClaude (don't trust local)
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// 4. otherwise (sample band) → requestHash low bit picks: 0=local, 1=claude
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type Policy struct {
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Floor float64
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Ceil float64
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}
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// Decide returns the routing decision for a single call.
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// requestHash is consulted only when passRate is in the sample band [Ceil, Floor).
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func (p Policy) Decide(passRate *float64, requestHash uint64) Decision {
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if passRate == nil {
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return DecideLocal
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}
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if *passRate >= p.Floor {
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return DecideLocal
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}
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if *passRate < p.Ceil {
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return DecideClaude
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}
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if requestHash&1 == 0 {
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return DecideLocal
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}
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return DecideClaude
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}
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