### 1. PROSE EVIDENCE
"The concrete had long since surrendered its rigidity, becoming a translucent membrane stretched thin over a violet-lit abyss." (Early)
- This passage effectively illustrates the "Dimensional Thinning" established in the world state through visceral, sensory-defying imagery.

"The 14Hz frequency did not enter through the air; it rose through the soles of phantom feet, through the vibration of the jawbone, through the resonant cavities of the ribs." (Mid)
- This reinforces the "Bone-Conduction Law" rule while maintaining the clinical yet horrific tone of the project’s physics.

"He had become a geometric ash-map. His remains had crystallized into a precise sigil—gray, salt-like patterns that traced the ley lines of the subterranean pressure." (Mid)
- This serves as a strong callback to the RAG context regarding Elias Thorne’s legacy, grounding the abstract horror in physical remains.

"The Earth had learned to hum, and Mark was the note that never ends." (Late)
- This final line successfully concludes the "Permanent: YES" status of Mark’s arc, transitioning from character to a feature of the landscape.

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### 2. CHARACTER VOICE AUDIT
The character voice signatures for **Mark** and **Sarah** are present in the context, but there is **no dialogue** in this chapter. 

**Mark Voice Audit:**
- Mark’s profile indicates "Absolute terminal detachment" and "ego has dissolved." The chapter adheres to this by removing Mark’s internal monologue entirely, replacing it with sensory descriptions of the lattice: *"Vibration... stabilization... broadcast... The lattice did not think these words; it felt them."*

**Sarah Voice Audit:**
- Sarah is deceased. Her legacy is maintained via the "digital recorder," which follows her RAG profile of always carrying a recorder. The narrative correctly identifies it as a "digital recorder clipped to a phantom boundary where a belt might once have been," honoring her "what they REACH FOR" habit.

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### 3. STRENGTHS TO PRESERVE
- **Adherence to Physics Rules:** The chapter meticulously follows the "Bone-Conduction Law." 
  - *Quote:* "The air was dead... Sound, as a function of air-conducted pressure, had been abolished."
- **Visual Consistency of the Epicenter:** The depiction of the "Aperture" and the "Lattice" aligns perfectly with the ch-10 world state.
  - *Quote:* "The blue-black metallic structure was all that remained—a rigid, crystalline frame housing a cooling slurry of liquefied biological matter."
- **The Trinity of Anchors:** The chapter successfully integrates the three components (Mark, Elias, Sarah) into a cohesive mechanism for the ending.
  - *Scene Reference:* The transition from the "Ash-map" (Elias) to the "Ghost Harmonic" (Sarah) to the "Primary Conductor" (Mark) creates a structural symmetry to the finale.

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### 4. MUST-FIX -- CONTINUITY
- **ORIGINAL:** "To the west, the second anchor: Sarah Miller’s digital recorder... The device was long dead, its lithium-ion battery drained to a chemical husk, yet it was not silent."
- **PROBLEM:** The RAG World State for Sarah Miller's Legacy specifically defines the loop as a "power-less 'Ghost Harmonic' loop," but the narrative choice to call the battery a "chemical husk" slightly contradicts the "power-less" nature by implying it *could* have been powered. Further, the RAG specifies this serves as the "rhythmic metronome," which the text includes, but it misses the specific detail of "non-conductive air" being "dead" while the recorder is the anchor.
- **FIX:** Clarify that the hardware itself is a physical resonance point regardless of the battery’s state. Change to: "The device was long dead, its mechanical internals serving only as a physical substrate for the power-less Ghost Harmonic loop."

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### 5. MUST-FIX -- CLARITY
- **ORIGINAL:** "The distance between the lattice and the ash-map was simultaneously miles and millimeters."
- **PROBLEM:** This leans into "Dimensional Thinning" but risks becoming a generic cosmic horror trope without a mechanical anchor to the specific "Euclidean integrity" mentioned in the world state.
- **FIX:** Anchor the spatial distortion to the Aperture mentioned in the context. Change to: "As Euclidean integrity collapsed into the Aperture, the distance between the lattice and the ash-map was simultaneously miles and millimeters."

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### 6. OPTIONAL SUGGESTIONS
- **Optional (Structure):** In the section describing the global effects, referencing the specific frequency "14Hz" one more time would reinforce the "Harmonic Baseline" rule.
  - *Quote:* "They felt a deep, subsonic thrum in their marrow..."
  - *Improvement:* "They felt the 14Hz thrum in their marrow..."

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### 7. FORBIDDEN CHANGES / NON-GOALS
- **REPETITION:** Do not remove the repetition of "14Hz" or "lattice." These are rhythmic anchors essential to the "Great Silence" atmosphere.
- **LACK OF DIALOGUE:** Since the RAG confirms Mark's ego dissolution and the extinction of the Archive, do not add dialogue or inner thought. The lack of "human" voice is a requirement of the Ch-10 world state.
- **PSEUDO-SCIENTIFIC TONE:** The blending of tectonic terminology with occult imagery (e.g., "North American craton" vs "geometric ash-map") is intentional and must be preserved.

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### 8. VERDICT
**SCORE: 92**
**PASS**

The chapter is a high-quality execution of the "Whispers in the Dark" project's finale. It strictly adheres to the established world state (Bone-Conduction Law, Tectonic Synchronization, and the Great Silence). All major character arcs (Mark’s dissolution, Sarah’s legacy, Elias’s crystallization) are resolved according to the provided RAG contexts. No MUST-FIX items are significant enough to warrant a REVISE verdict, as they are minor clarifications of the existing lore.