diff --git a/Docs/Vault/06_Roadmap/Backlog.md b/Docs/Vault/06_Roadmap/Backlog.md
index 47001b9fa..c2fd44061 100644
--- a/Docs/Vault/06_Roadmap/Backlog.md
+++ b/Docs/Vault/06_Roadmap/Backlog.md
@@ -31,7 +31,7 @@ A 5-subsystem loop evaluation found the loop has **two conflicting win-models bo
 
 - **A — Coherence core — ✅ BUILT + validated (2026-06-25):** win-driver moved *base sieges → expedition clears* — `ExpeditionGateSystem` is now the sole production writer of `GoalProgress.Charge` (+1/clear, credited **on RETURN** — the review overturned credit-on-clear, which would arm the undefended final siege → uncontestable Loss; credit-on-return keeps the player home). **AFK win killed** (`ScheduleEnabled` baked OFF, retaliation-only; survived sieges no longer credit). Final beat = the END-2 final **base** siege (operator-locked). 389/389 EditMode + clean Play smoke (no sort-cycle, `ScheduleEnabled=0`). Design-review-gated (`wf_ebef4e81-dba`). Fun-gate playtest pending. *Next: **C**.*
 - **B — Retaliation connect:** post-expedition siege becomes THE base-siege source (fix the interference) — defending what you built becomes a *consequence* of sortieing, not the goal. *Netcode-touching → design-review.*
-- **C — Legibility fixes:** walls actually block (structures on the enemy collision filter); Aether-upgrade HUD button + cost; Biomass sink (or cut); cold-start ledger seed; hide dead Harvester/Conveyor/Pylon; expedition objective UI + gate prompt; reward scales with depth.
+- **C — Legibility fixes — ✅ BUILT + validated (2026-06-25):** walls now block enemies (dedicated `Structure` physics layer; player passes own walls — Play-verified baked filters); Aether-upgrade HUD button + affordability tint; Biomass sink (Wall cost → Biomass, operator fork); cold-start Ore seed (kills the turret-before-fabricator deadlock); dead Harvester/Conveyor/Pylon hidden from palette + hotkeys; **expedition objective readout** (new replicated `ExpeditionObjective` GhostField) + gate prompt. Reward-depth scaling deferred (operator fork). Scoping/design-gated (`wf_7c5a555e-136`); 389/389 EditMode + Play smokes. *Visual fun-gate pending. Next: B (retaliation polish) → D.*
 - **D — Persistent meta (= Slice 4):** SaveData v6 + between-runs growth (above).
 
 **Consolidation:** [[DR-036_END2_Final_Siege_Win_Lose]]'s "survive-4-base-sieges" win is **superseded** (win-driver → expedition clears; the charge-cadence "siege-survived-only" lock is reversed); [[DR-034_END1_Losable_Core]]'s Core stays but as a **consequence of the retaliation siege**, not the win-gate. The health-bar fill bug-fix (sprite-less `Image.Filled` ignores `fillAmount` → size the RectTransform) rides the first commit.
diff --git a/Docs/Vault/07_Sessions/_Decisions/DR-042_Loop_Reshape_Expedition_Driven.md b/Docs/Vault/07_Sessions/_Decisions/DR-042_Loop_Reshape_Expedition_Driven.md
index 7bcb042b8..8a7c9f043 100644
--- a/Docs/Vault/07_Sessions/_Decisions/DR-042_Loop_Reshape_Expedition_Driven.md
+++ b/Docs/Vault/07_Sessions/_Decisions/DR-042_Loop_Reshape_Expedition_Driven.md
@@ -93,4 +93,16 @@ The implementation **relocates** the single writer of `GoalProgress.Charge` (it
 - **No system-ordering change** → no sort-cycle risk (Gate is already `[UpdateBefore(CyclePhaseSystem)]`, so the credit lands before `GoalReachedSystem` reads the edge same-tick). SaveData stays **v5**; legacy v5 saves load as-is (their old siege-era Charge reads as clears — accepted for single-slot dev saves).
 - **Validation:** 389/389 EditMode (re-pointed `CyclePhaseSystemTests` + `EndgameWinLoseTests` survived-siege assertions; extended `ExpeditionGateRewardTests` with the +1, no-double-credit, and clamp cases) + a clean netcode Play smoke (world boots, no sort-cycle, `ScheduleEnabled=0`, no exceptions). **Fun-gate playtest still pending** (the base reads as inert until you walk to the gate — the gate-prompt UI is phase C, accepted caveat).
 
-### Next phases (unchanged order): C (legibility) → B (retaliation polish) → D (Slice 4 meta, SaveData v6).
+### Phase C build record — BUILT + validated (2026-06-25)
+Scoping/design-gated (`wf_7c5a555e-136`). Legibility cleanup that makes the loop self-explain. Shipped in two commits:
+- **C7b objective readout** — new replicated `ExpeditionObjective{[GhostField] byte State, short Remaining}` on the untagged CycleDirector ghost (cross-region safe). Sole writer `ZoneEnemyDirectorSystem`, written ABOVE its early-returns (snapshot-above-early-return). Play-verified it replicates server→client.
+- **C7a gate prompt + HUD readout** — `HudSystem` shows "GO TO THE EXPEDITION GATE" / "EXPEDITION IN PROGRESS — N remaining" / "CLEARED — return to claim" (below the siege/overrun overrides).
+- **C6a Aether upgrade button** — un-gated `BuildSendSystem.UpgradeAbility`; `HudSystem` button + affordability tint (was U-key only).
+- **C6c cold-start seed** — `CycleDirectorSpawnSystem` seeds `Tuning.StartingOre`(50) on a NEW game only (born-correct, pre-Playback). Kills the silent turret-before-fabricator deadlock. Play-verified `seededOre=50`.
+- **C6b Biomass sink** — Wall cost Ore→Biomass (the dead currency now has a home). Play-verified.
+- **C6d palette declutter** — dead Pylon/Harvester/Conveyor hidden from the palette + dev hotkeys (code-intact).
+- **C5 walls block enemies** — dedicated `Structure` physics layer (slot 9) + `WorldCollisionConfig.StructureMask`; `EnemyAISystem` ORs it into the sweep filter; Wall/Turret/Pylon get cell-sized colliders on the Structure layer; matrix `Default×Structure` unchecked so the player CC passes its own walls while enemies are stopped. **Play-verified baked filters:** `StructMask=512`, structure `BelongsTo=512 CollidesWith=0xFFFFFFFE` (excludes the player/Default bit). Server-only/static → deterministic, despawn frees collision for free.
+
+389/389 EditMode + clean Play smokes throughout. SaveData stays **v5**. The Biomass-for-walls choice + defer-reward-scaling were operator forks (2026-06-25). Open: a **visual fun-gate** (husk stops at wall / player walks through; objective readout reads clearly) and the optional gate-direction arrow (deferred).
+
+### Next phases: **B** (retaliation polish — mostly satisfied by A2 already; tune the post-expedition siege feel) → **D** (Slice 4 persistent meta, SaveData v6).