book3: finalize Ch02 "The File" + Ch01 and continuity sweep

Ch02 drafted, reviewed, and finalized — ruin case brief, Compact
grievance reveal, grooming hint. Stage 5 continuity across story
summary, timeline, and character files (Phelan, Mere, Ledger, Devod,
Sabre, Holven). Bundles prior-session work: Ch01 final, crystal-drain-
echo series canon, WellsMoon moss hybrid artifacts, and spec cleanup.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

world/magic/runic-flow-rules.md

@@ -38,3 +38,16 @@ Full magic system documentation for Corvel.
    - This application was Devod Fields' conceptual breakthrough ("if you can't unlock the lock, move what it's locked to"), executed technically by Phelan
 
 **Sniff parallel:** The binding salts Mere used intuitively on the cursed dog (Ch03) operate on the same principle as ghostveil moss — dampening magical energy to weaken a working. The dog cure was the small-scale proof of concept; the Floundry cure is the industrial-strength application. Phelan recognizes this connection explicitly.
+
+**Ghostveil and the crystal-drain echo (Book 3 canon):** Ghostveil also dampens the personality residuals that pre-Compact amplification crystals leave in their drain victims. Same drug, same mechanism, extended application. The Compact's ghostveil chokehold is partly maintained to limit treatment access for this class of victim — senior leadership knows, rank-and-file does not. See `/world/magic/crystal-drain-echo.md` for the mechanic, victim map, and discovery arc.
+
+---
+
+## Pre-Compact Residue — Sheath-Loss Imprint
+
+Pre-Compact amplification crystals (Kae's Mallory crystal is the canonical example) draw life-force from their targets. The drain strips the victim's arcane **sheath** — the internal structure that regulates suppressed aspects of the psyche and dormant magical capacity. The sheath does not fully regrow. Each victim develops a unique personality residual governed by a universal rule: *the drain amplifies what the victim most deeply suppressed.*
+
+Modern Runic Flow theory does not fully account for this. Pre-Compact archives document the phenomenon (referenced in the Book 3 Athel Repository archive). The Compact's public magical-system doctrine omits it.
+
+Full worldbuilding reference: `/world/magic/crystal-drain-echo.md`
+Full design spec: `docs/superpowers/specs/2026-04-21-crystal-drain-echo-design.md`