### 1. PROSE EVIDENCE
*   **Quote 1 (Early):** "The basement hatch gaped open beneath Miller Residence, and the stairs below breathed with a rhythm that matched the flutter in Sarah’s carotid artery—fourteen beats per second, exactly—not a waveform anymore, but a predator’s respiration."
    *   **Commentary:** This effectively bridges the gap between Sarah's scientific obsession with frequencies and the emerging biological horror of the Vault.
*   **Quote 2 (Mid):** "He smelled of ozone and old, wet iron—a scent that seemed to be sweating out of his very pores."
    *   **Commentary:** This sensory detail reinforces the recurring "wet iron" motif from the world-state while grounding Elias's physical deterioration in a visceral way.
*   **Quote 3 (Late):** "The voice was hers. Not just a recording, not a ghost-loop, but her exact vocal signature, including the sharp, cynical edge she used when her skepticism was being pushed to the brink."
    *   **Commentary:** This passage masterfully uses the third-person limited perspective to heighten the psychological stakes of the mimics.
*   **Quote 4 (Late):** "She was producing 14Hz harmonics through her own chest cavity, her bones acting as a tuning fork for the house."
    *   **Commentary:** This provides a terrifyingly concrete explanation for the "Acoustic Gravity" and "Biological Synchronization" world rules mentioned in the prompt.

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### 2. CHARACTER VOICE AUDIT

**Sarah Miller**
*   **Line:** "E-em-empirically speaking, blueprints don't mutate. The foundation terminates at eight feet. If the descent exceeds fifteen steps, we’re... we’re dealing with a spatial anomaly."
*   **Signature Vocabulary:** **YES.** Uses "empirically speaking," "spatial anomaly," and "data doesn't lie."
*   **Forbidden Patterns:** **YES.** Avoids flowery supernatural affirmations; stays analytical even when terrified.
*   **Emotional Register:** **YES.** Reflects her 85% arc completion where she uses logic as a failing shield against physical assault.
*   **Stammering Check:** **YES.** "E-em-empirically" and "th-th-this" correctly utilize her imperfection signature (stuttering initial consonants during audio-feedback headaches).

**Elias Thorne**
*   **Line:** "The stairs. They’re deeper. Empirically speaking, they shouldn’t be deeper, Sarah."
*   **Signature Vocabulary:** **YES.** While he mimics Sarah's "empirically speaking," it is contextually justified as a symptom of the "Whispers" eroding his autonomy.
*   **Forbidden Patterns:** **YES.** Consistent with his 75% arc progression toward "surrendering autonomy to the signal's pull."
*   **Emotional Register:** **YES.** He is "transfixed/ethereal," shown by his flat, hollowed-out delivery.

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### 3. STRENGTHS TO PRESERVE
*   **Mechanical Dread:** The use of specific measurements (14Hz) makes the horror feel inescapable and tactile rather than vague. 
    *   *Reference:* "...fourteen beats per second, exactly—not a waveform anymore, but a predator’s respiration."
*   **The Mimicry Mechanics:** The way the "Whispers" use Sarah’s specific skeptical tone against her creates a unique internal conflict.
    *   *Reference:* "Get a grip—what the actual fuck are you waiting for?!" (The false Sarah's line mirrors her "Furious" stress marker perfectly).
*   **Logical Descent:** The transition from a 1950s basement to "raw, jagged stone" is a grounded way to handle the Geometric Collapse.

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### 4. MUST-FIX -- CONTINUITY
*   **ORIGINAL:** "'Mama?' It was Mark’s voice. Small, whimpering, and utterly broken. Sarah’s breath hitched. Mark was upstairs. He was catatonic in the living room..."
*   **PROBLEM:** The CHARACTER SHEET: MARK explicitly states: "Character not present in ch-01 state, world events, or RAG; do not introduce without project approval." While mentioned as staying "at the residence," Mark has no voice signature or canonical status in the provided project context/RAG for this chapter. Furthermore, Sarah is identified as a "colleague-turned-potential-love-interest," not an established mother to a child named Mark in this residence.
*   **FIX:** Remove the specific identification of Mark as Sarah's child/mama. Replace his voice with a distorted mimicry of a generic child or a neighbor to maintain the horror without violating the character RAG. 
    *   *Rewrite:* "'Help me.' It was a child’s voice—thin, echoing, and stripped of innocence. Sarah’s breath hitched. There shouldn't be anyone else here."

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### 5. MUST-FIX -- CLARITY
*   **ORIGINAL:** "The recording was hers. Not just a recording, not a ghost-loop... The voice that followed was Elias’s, but his tone was one of frantic, jagged terror she hadn’t heard from him yet. 'I told you! I told you we couldn't go back!'"
*   **PROBLEM:** Earlier in the paragraph, it says "It was her own voice, screaming," then says "The voice that followed was Elias’s." In the next section, it says the recorder is "spinning" but she "hadn't hit play." The rapid-fire sequence of who is talking on the tape vs. live mimicry becomes blurred.
*   **FIX:** Clarify the source of each sound more distinctly. 
    *   *Rewrite:* "The device on her belt didn't just hum; it screamed. From its small speaker, a recording played—though the wheels didn't turn. First, her own voice, distorted: 'It's locked from the inside!' Then, a reply in Elias's voice: 'I told you we couldn't go back!'"

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### 6. OPTIONAL SUGGESTIONS
*   **Acoustic Tension:** (Optional) Since Sarah is a supporting role/love interest to Elias, her reaction to his black tears could be more personal.
    *   *Quote:* "Elias blinked, the black fluid on his cheeks smearing." 
    *   *Suggestion:* She could instinctively reach out to wipe them before drawing back in analytical fear, emphasizing her conflict between emotional "Need" and skeptical "Want."

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### 7. FORBIDDEN CHANGES / NON-GOALS
*   **Do not fix Sarah’s stutter.** The "Th-this" and "m-m-m" patterns are her established imperfection signature for audio feedback triggers.
*   **Do not "elevate" Elias's dialogue.** His "fatalistic drone" and "cracking like dry parchment" delivery are intentional expressions of his 75% arc surrender.
*   **Do not remove the "Wet Iron" repetition.** This is a core world-state sensory anchor.

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### 8. VERDICT: REVISE
**SCORE: 82**
**Justification:** The chapter is atmospheric and adheres strictly to voice signatures, but contains a significant continuity violation by introducing "Mark" as a familial relation to Sarah ("Mama") despite the character sheet and RAG context explicitly forbidding his introduction without approval and defining Sarah as a colleague/love interest rather than a mother. Status of the child and Sarah's relationship must be aligned with the provided project data.