diff --git a/CHANGELOG.md b/CHANGELOG.md
index 75346db..86bf554 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,21 @@
 
 All notable changes to `@sharp-api/client` are documented here.
 
+## 0.4.1 — 2026-06-02
+
+### Added — structured `team_side` + `market_segment` (issue #76 / #689)
+
+- `NormalizedOdds`, `EVOpportunity`, and `ClosingOdd` gain optional `team_side`
+  (`'home' | 'away' | 'draw' | 'over' | 'under'`) and `market_segment`
+  (`string`). Wire keys are snake_case (the client returns raw JSON without key
+  transforms), matching `is_active`.
+- `team_side` is the raw structured side decomposed out of the compound
+  `selectionType` / `selection_type` vocabulary — prefer it over parsing compound
+  prefixes like `'home_over'`. `market_segment` is the canonical contest slice.
+- `NormalizedOdds.selectionType` widened with `(string & {})` so it accepts the
+  team-total compound forms (`'home_over'`, ...) the server emits without a major
+  bump. Additive, non-breaking.
+
 ## 0.4.0 — 2026-06-02
 
 ### Changed
diff --git a/package.json b/package.json
index dd6a09b..70ecb8a 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@sharp-api/client",
-  "version": "0.4.0",
+  "version": "0.4.1",
   "description": "Official TypeScript/JavaScript client for the SharpAPI real-time sports betting odds API",
   "type": "module",
   "main": "./dist/index.cjs",
diff --git a/src/index.ts b/src/index.ts
index af563a6..8d7db24 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -301,6 +301,17 @@ export interface NormalizedOdds extends NestedRefs {
     | 'home_draw'
     | 'away_draw'
     | 'home_away'
+    | (string & {})
+  /**
+   * Raw structured side axis ("home" | "away" | "draw") decomposed out of the
+   * compound selectionType vocabulary (issue #76). Optional + additive — absent
+   * when the adapter didn't stamp it. Wire key is snake_case `team_side` (the
+   * client returns raw JSON without key transforms). Prefer over parsing
+   * compound selectionType prefixes like "home_over".
+   */
+  team_side?: 'home' | 'away' | 'draw' | 'over' | 'under'
+  /** Canonical contest slice ("full_game" | "1st_half" | ...) — issue #689. Wire key snake_case. */
+  market_segment?: string
   odds: OddsValue
   line?: number
   eventStartTime: string
@@ -336,6 +347,10 @@ export interface EVOpportunity extends NestedRefs {
   fairProbability: number
   evPercentage: number
   kellyPercent: number
+  /** Raw structured side axis ("home" | "away" | "draw") — issue #76. Optional; wire key snake_case `team_side`. */
+  team_side?: 'home' | 'away' | 'draw' | 'over' | 'under'
+  /** Canonical contest slice ("full_game" | "1st_half" | ...) — issue #689. Wire key snake_case. */
+  market_segment?: string
   detectedAt: string
 }
 
@@ -550,6 +565,10 @@ export interface ClosingOdd {
     | 'away_draw'
     | 'home_away'
     | (string & {})
+  /** Raw structured side axis ("home" | "away" | "draw") — issue #76. Optional + additive. */
+  team_side?: 'home' | 'away' | 'draw' | 'over' | 'under'
+  /** Canonical contest slice ("full_game" | "1st_half" | ...) — issue #689. */
+  market_segment?: string
   odds_american: number
   odds_decimal: number
   /** Spread / total line — present only on point-spread and totals markets. */