Scoring Changelog

A versioned record of every change to the scoring methodology — transforms, weights, thresholds, patterns, and ranking logic.

Every promotion that touches a formula, weight, threshold, or ranking order gets an entry here, written as part of the same PR that ships the change.

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Entry format

### vX.Y.Z — YYYY-MM-DD

**Changed:** short name of what moved (e.g. "LRS weights", "churn_magnet threshold")
**PR:** hotspots#NNN

| | Before | After |
|--|--|--|
| field or formula | old value | new value |

**Notes:** (optional) why, edge cases, what stays the same

One entry per released version that contains a scoring change. If a release has no scoring changes, omit it.

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Changelog

v1.24.0 — current baseline

No scoring changes since this changelog was introduced. The formulas in Scoring Methodology represent the current baseline.

Baseline snapshot:

Component	Value
LRS weights	cc=1.0, nd=0.8, fo=0.6, ns=0.7
R_cc cap	6.0 (log2 scale)
R_nd cap	8.0 (linear)
R_fo cap	6.0 (log2 scale)
R_ns cap	6.0 (linear)
Band: Low	LRS < 3.0
Band: Moderate	3.0 ≤ LRS < 6.0
Band: High	6.0 ≤ LRS < 9.0
Band: Critical	LRS ≥ 9.0
Activity: churn weight	0.5
Activity: fan-in weight	0.4
Activity: touch weight	0.3
Activity: SCC weight	0.3
Activity: recency weight	0.2
Activity: neighbor-churn weight	0.2
Activity: depth weight	0.1
Driver label percentile	P75
Quadrant active threshold	touch > P50 OR days_since ≤ 30
Pattern: complex_branching	CC ≥ 10 AND ND ≥ 4
Pattern: deeply_nested	ND ≥ 5
Pattern: exit_heavy	NS ≥ 5
Pattern: god_function	LOC ≥ 60 AND FO ≥ 10
Pattern: long_function	LOC ≥ 80
Pattern: churn_magnet	churn ≥ 200 AND CC ≥ 8
Pattern: hub_function	fan-in ≥ 10 AND CC ≥ 8
Pattern: middle_man	fan-in ≥ 8 AND FO ≥ 8 AND CC ≤ 4
Pattern: shotgun_target	fan-in ≥ 8 AND churn ≥ 150
Pattern: stale_complex	CC ≥ 10 AND LOC ≥ 60 AND days ≥ 180
Pattern: neighbor_risk	neighbor_churn ≥ 400 AND FO ≥ 8
Pattern: cyclic_hub	SCC ≥ 2 AND fan-in ≥ 6