### 1. PROSE EVIDENCE
*   **Quote 1 (Early):** "The Miller Residence cellar no longer echoed with breath or footfall; it thrummed, a violet-lit chamber where stone and bone had merged into the 14Hz baseline."
    *   *Commentary:* This effectively establishes the transition from biological to geological reality using sharp, sensory-shifting imagery.
*   **Quote 2 (Mid):** "A sparrow falling from a branch made no sound upon impact, but a person standing a mile away would feel the thud of its tiny ribcage hitting the earth as a sharp, percussive pulse in their own ankles."
    *   *Commentary:* This provides a visceral, concrete illustration of the "Bone-Conduction Law" referenced in the RAG world-state.
*   **Quote 3 (Mid):** "The corners of the room didn't meet at ninety degrees; they curved into the violet-lit Aperture, a non-Euclidean tear in the floor where the signal’s source bled through from a place that was not a place."
    *   *Commentary:* This passage successfully visualizes the "Dimensional Thinning" and "Euclidean collapse" required by the project context.
*   **Quote 4 (Late):** "The atmosphere was a graveyard of silent air, while the ground was a chorus of bones."
    *   *Commentary:* The metaphor perfectly encapsulates the planetary shift from air-conducted sound to skeletal vibration.

### 2. CHARACTER VOICE AUDIT
There is **no spoken dialogue** in this chapter. The characters (Mark, Sarah, and Elias) have transitioned into non-sentient biological or mechanical artifacts.

**Reference to RAG Context:**
*   **Sarah Miller:** Her voice profile specifies prefixes like "empirically speaking" and a "digital recorder clipped to her belt." While she does not speak, the chapter honors her voice signature through the artifact: "It was the analytical anchor Sarah would have demanded—a data point that did not lie..."
*   **Mark:** His profile indicates "Absolute terminal detachment" and "individual ego has dissolved." The prose reflects this by describing him as a "geometry of blue-black metal" and stating, "There was no more Mark."
*   **Elias Thorne:** His profile emphasizes "occult patterns." The prose honors this by describing his remains as "a sigil of lime and mineral" and an "ash-map."

### 3. STRENGTHS TO PRESERVE
*   **The Scientific/Occult Hybrid Imagery:** The description of Sarah’s recorder—"the lithium had long since leaked into the stone. Yet, the red light on its chassis stayed lit—a persistent, impossible ember"—beautifully bridges the gap between her rationalist background and the supernatural outcome.
*   **The Scale of the Horror:** The transition from the cellar to the "North American craton" ("The continent was becoming a tuning fork") elevates the stakes from a local haunting to a planetary extinction event.
*   **Adherence to World Logic:** The text strictly follows the "Bone-Conduction Law" established in the world state, specifically that "to shout would be to waste movement; the throat would strain, the lungs would heave, and the silence would remain absolute."

### 4. MUST-FIX -- CONTINUITY
*   **ORIGINAL:** "The lithium had long since leaked into the stone. Yet, the red light on its chassis stayed lit—a persistent, impossible ember."
*   **PROBLEM:** This aligns with the "Ghost Harmonic" state, but the prompt's RAG state for Sarah Miller notes the recorder is generating a "power-less" loop. The phrase "long since leaked" implies a vast passage of time (years or decades), which may conflict with the timeline if the "Great Silence" is an active, current event. However, given the "Dimensional Thinning" and "Non-Euclidean" nature of the cellar, time dilation is implied. 
*   **FIX:** No fix required, but ensure subsequent chapters (if any) recognize this "long since" as a symptom of the Aperture’s proximity rather than a standard timeline jump.

### 5. MUST-FIX -- CLARITY
*   **No MUST-FIX clarity items found.** The transitions between the specific artifacts in the cellar and the global implications are handled with logical flow.

### 6. OPTIONAL SUGGESTIONS
*   **Optional (Integration of Mark's "Known Secret"):** The RAG context for Mark mentions he "Consciously experienced the planetary consciousness... before ego dissolution."
*   **Quote:** "In the final moments before his ego had been scoured away, Mark had felt it."
*   **Improvement:** Briefly specify if the "secret" of that experience changed his final state. For example: "In the final moments before his ego had been scoured away, Mark had felt the cold beauty of the 14Hz chord—a secret he carried into the metal, knowing now that the Whispers were not an invasion, but a homecoming."

### 7. FORBIDDEN CHANGES / NON-GOALS
*   **The lack of dialogue:** Do not add dialogue. The "Great Silence" and "Terminal Detachment" of the characters make speech impossible and narratively inappropriate. 
*   **The "Imperfect" Biology:** Descriptions of "biological remains transitioned into a rigid, blue-black metallic lattice" must be kept; though grotesque, they are the established "Character State" for Ch-10.
*   **Sarah’s skepticism:** Even though she is dead, her "Fatal Flaw" of rigid skepticism is honored by framing her artifact as an "analytical anchor." Do not turn her legacy into one of "faith."

### 8. VERDICT: PASS
**SCORE: 98**
**Justification:** The chapter is a near-flawless execution of the provided RAG context and world-state rules. It perfectly captures the atmosphere of "The Great Silence" and "Tectonic Synchronization," and it transforms the three main characters into their final "Artifact" states exactly as defined in the project description. All voice signatures (via legacy/artifacts) are respected.