### 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 technical obsession with frequency and the growing biological threat of the environment.
*   **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 provides physical weight to the "wet iron" scent established in the RAG context, signaling Elias's physical degradation.
*   **Quote 3 (Late):** "She was producing 14Hz harmonics through her own chest cavity, her bones acting as a tuning fork for the house."
    *   **Commentary:** This is a masterful execution of the "Biological Synchronization" world rule, visualizing the internal physical toll of the signal.
*   **Quote 4 (Late):** "The device showed she was producing 14Hz harmonics through her own chest cavity, her bones acting as a tuning fork for the house."
    *   **Commentary:** This literalizes the "Acoustic Gravity" and "Biological Synchronization" rules mentioned in the World State.

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### 2. CHARACTER VOICE AUDIT

**Sarah Miller**
*   **Quote:** "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. A structural bleed."
*   **Signature Vocabulary/Tics:** **YES**. She uses "empirically speaking" and stammers initial consonants ("E-em-empirically") as her voice sheet requires when under audio stress.
*   **Avoid Forbidden Patterns:** **YES**. She maintains her analytical stance, referring to the situation as a "spatial anomaly" rather than jumping to supernatural conclusions.
*   **Emotional Register:** **YES**. She is at 85% arc completion, shifting from debunking to focusing on physical survival, but her language still clings to data as a shield.

**Elias Thorne**
*   **Quote:** "It’s not an anomaly... It’s a throat. We’re walking down a throat."
*   **Signature Vocabulary/Tics:** **YES**. His speech is "flat" and "hollowed out," consistent with his 75% arc progression toward surrendering to the signal.
*   **Avoid Forbidden Patterns:** **YES**.
*   **Emotional Register:** **YES**. He is "transfixed/ethereal," no longer searching for meaning but accepting the physical reality of the Vault.

**Mark (NPC/Voice-Sig)**
*   **Quote:** "Mama?"
*   **Signature Vocabulary/Tics:** **NO**. The voice sheet for Mark is "Unknown," but the narrative uses him as a mimicry tool.
*   **Analysis:** While his profile is blank, his appearance as a "speaker" for the house aligns with the "World State: NPC Memory."

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### 3. STRENGTHS TO PRESERVE

*   **Technical/Medical Integration:** The way Sarah uses her digital recorder and biological terminology ("carotid artery," "14Hz harmonics") keeps the horror grounded in her established character. Preserve: "The device showed she was producing 14Hz harmonics through her own chest cavity..."
*   **Sensory Consistency:** The recurring "wet iron" scent and the 14Hz pulse are used as grounding motifs. Preserve: "The wet iron was weeping from his tear ducts, narrow black tracks marking his cheeks."
*   **Mechanical Horror:** The "ghost-looping" of the recorder and the future-voice timestamp are excellent uses of the "Acoustic Gravity" and "Singularity" rules. Preserve: "The speaker emitted a single sentence in her own voice, recorded with a timestamp five minutes in the future."

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### 4. MUST-FIX -- CONTINUITY

*   **ORIGINAL:** "'Elias, empirically speaking, radio ghosts aren't a thing—unless this damn hum in my skull says otherwise!'"
*   **PROBLEM:** This is Sarah's specific "Example line of dialogue that could not belong to any other character" from her voice sheet. While it is used here as her double/mimic, the context in the RAG states a major open loop: "Owes Elias a logical explanation (ch-02) — UNPAID." By having her internal voice/mimic speak this now, it creates tension, but the immediate response from Elias ("It sounded so... certain") treats it as a distraction rather than the payoff for a 7-chapter-long "Active Obligation."
*   **FIX:** Acknowledge the payment of the debt. Add a beat where Sarah realizes the house is using her "unpaid" obligation (the logical explanation she owes him) as bait.

*   **ORIGINAL:** "Sarah’s breath hitched. Mark was upstairs. He was catatonic in the living room..."
*   **PROBLEM:** The World State and Character State for Sarah/Elias place them at "The Vault entrance (Deep sub-structure)." There is no mention of Mark's state in the latest Character States/NPC Memory for Ch-09, although he is referenced as a voice signature. If he is catatonic in the living room, this needs to be explicitly confirmed in the World State.
*   **FIX:** Ensure the "Active World Events" or "NPC Memory" reflects Mark's location to prevent a POV/Logic break where he is "upstairs" but the stairs have become a "light-swallowing void" (suggesting distance is now non-linear).

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### 5. MUST-FIX -- CLARITY

*   **ORIGINAL:** "Sarah... didn't see her face. She saw a version of herself with skin the color of wet iron, her mouth agape in a silent, 14Hz scream—the vision of her own death from the Oakhaven facility archives."
*   **PROBLEM:** Earlier in the chapter, the text says: "The Oakhaven facility... communication remains severed; the property is effectively a black hole." The RAG mentions Sarah had a vision of her own death in Ch-06, but it does not state this was part of the "Oakhaven facility archives." It implies it was a personal vision. 
*   **FIX:** Clarify if she saw this in her mind during Ch-06 or if it's literal archival footage. REWRITE: "...the vision of her own death she had glimpsed in the signal’s distortion during the Ch-06 surge."

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### 6. OPTIONAL SUGGESTIONS

*   **Optional (World Rule reinforcement):** "The distance between the basement and the Vault is now fluctuating based on the intensity of the signal." (RAG). The prose mentions the stairs feel like "fifty feet," but could more explicitly lean into the "Geometric Collapse" by having Sarah check her pedometer or notice the step count doesn't match the depth.
*   **Optional (Relationship):** Elias Thorne's secret is that he knows the basement architecture doesn't match the blueprints. Sarah discovers this here ("The foundation terminates at eight feet"). This would be a good moment for Sarah to feel the betrayal of him withholding that data.

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### 7. FORBIDDEN CHANGES / NON-GOALS

*   **Do NOT remove the stutters:** The "E-em-empirically" and "th-th-this" are mandatory imperfections linked to her audio-feedback headaches.
*   **Do NOT normalize the dialogue:** The flat resonance of Elias and the clinical/analytical interjections of Sarah are essential to their established character arcs.
*   **Do NOT rationalize the "Wet Iron":** The fluid coming from tear ducts is a manifestation of the "Biological Synchronization" and should remain unexplained and visceral.

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### 8. VERDICT

**SCORE: 88**
**REVISE**: The chapter is atmospheric and adheres strictly to voice signatures, but there is a logic/continuity risk regarding Mark’s current location/state and a minor clarity issue regarding where Sarah’s vision of death originated (personal vision vs. Archive records). The "Unpaid Obligation" from Ch-02 is touched upon but needs more weight to feel like a plot pay-off rather than just flavor.