Phase 14: add debug reinject diag logging — B-002 filter visibility

Expose settings.debug snapshots on session_compact and before_agent_start
so Phase 14 can see which filter stage drops --skill paths.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/settings.ts

@@ -26,6 +26,8 @@ export interface SkillReinjectSettings {
 	suffix: string;
 	/** Soft warn threshold; omit for unlimited with default warn above 3 (SPEC §15). */
 	maxSkills?: number;
+	/** Verbose reinject filter logging via ui.notify (Phase 14 / B-002). */
+	debug: boolean;
 }
 
 /** Defaults from SPEC §7.3 — extension off until explicitly enabled. */
@@ -36,6 +38,7 @@ export const DEFAULT_SKILL_REINJECT_SETTINGS: Readonly<SkillReinjectSettings> =
 	reinjectOnManualCompaction: false,
 	autoCompactIntegration: "auto",
 	suffix: "[skill-reinject] Re-applied after compaction.",
+	debug: false,
 };
 
 export function createDefaultSettings(): SkillReinjectSettings {
@@ -77,6 +80,9 @@ export function parseSkillReinjectPartial(raw: unknown): PartialSkillReinjectSet
 	if (typeof obj.maxSkills === "number" && Number.isInteger(obj.maxSkills) && obj.maxSkills > 0) {
 		result.maxSkills = obj.maxSkills;
 	}
+	if (typeof obj.debug === "boolean") {
+		result.debug = obj.debug;
+	}
 	return result;
 }