This is Lane, Line Editor. I’ve tuned the frequency on Chapter 20. The technical-to-tactile ratio is hitting the sweet spot, but there are a few rhythmic hitches and "clean" prose habits that need a rougher edge to match the swamp.

### 1. STRENGTHS TO PRESERVE
*   **The Technical Metaphor:** Using code logic to describe biological state is Marcus’s strongest trait. *“A structural complexity that made his old neural-mapping algorithms look like a child’s stick drawing.”* This anchors his POV perfectly.
*   **Elena's Abrasive Utility:** She remains the grounding wire. Her dialogue reflects her "Mechanic" roots: *“Friction is our only friend today.”*
*   **The "Sarah" Partition:** Repurposing the Alpha-7 AI as a communal guardian is a poignant resolution to the tech-debt established in early chapters.
*   **Voice Signature Audit:**
    *   **Marcus:** **YES.** The diagnostic self-talk (e.g., *"Diagnostic: Lateral sway at four percent"*) and the four-beat thumb tap are consistent.
    *   **Elena:** **YES.** Her dismissiveness of "clean-room" logic is distinct.
    *   **David:** **YES.** He remains the only character consistently using cardinal directions for navigation (*"North-by-Northwest"*).
    *   **Sarah (AI/Radio):** **YES.** The Texas lilt surviving through the technical jargon (*"hittin' the North-by-Northwest corner"*) works well.

### 2. MUST-FIX — CONTINUITY
*   **The "Sarah" Logic:** In Chapter 20, Sarah is spoke of as a "partition" or an AI log, but then speaks over comms as a grounded person in the cabin. The text needs to clarify if the "Sarah-partition" is a digital ghost/simulation or if the real Sarah is simply using the interface.
    *   *The error:* "The Sarah-partition was pulsing... 'Sarah? Acknowledge,' he said into his comms. 'Status: Active,' Sarah’s voice came back."
    *   *The correction:* Ensure a line distinguishes between the *system notification* (The Sarah-Log) and the *human woman* (Sarah) responding to the alert.
*   **Thermal Logic:** Marcus mentions the "Ravens" will pick up "thermal bleed," but Elena says the "trees will eat the heat." Earlier chapters established the mesh mimics background radiation to be "true dark." 
    *   *The correction:* Align the dialogue so they are confirming the mimicry is active, rather than debating if it works (which they should know by now).

### 3. MUST-FIX — CLARITY
*   **Word Choice - "Loseing":** This appears twice in the text.
    *   *Quote:* "...voice loseing its tactical edge" and "voice loseing its diagnostic chill."
    *   *Fix:* Change to **losing**.
*   **Action Tenebrous:** *“Elena swung around the trunk, her harness clashing.”*
    *   *The Problem:* "Clashing" is a visual/color word or a loud cymbal sound. Harnesses "clatter," "chink," or "jangle." 
    *   *Fix:* Change "clashing" to **clattering** or **clinking**.

### 4. OPTIONAL SUGGESTIONS
*   **Rhythm/Economy:** ORIGINAL: *"He held it there, his thumb beginning its involuntary, rhythmic four-beat sequence against the side of the plastic case."* → SUGGESTED: **"He held it there. His thumb began its involuntary four-beat sequence against the plastic."** 
    *   *Rationale:* The original sentence is a bit "adjective-heavy." The rhythm of the prose should mirror the pulse he's feeling.
*   **Dialogue Tightening:** ORIGINAL: *"If you let the slack hit the lichen, we lose the signal integrity. This isn't a clean-room installation, Marcus. Friction is our only friend today."* → SUGGESTED: **"Keep the slack off the lichen or we lose signal. This isn't a clean-room, Marcus. Friction’s our only friend."**
    *   *Rationale:* Elena is working 60 feet up; her breath should be shorter, her commands tighter.

### 5. FORBIDDEN CHANGES / NON-GOALS
*   **Do not "fix" the tech-jargon.** Marcus thinking in terms of "latency bottlenecks," "handshakes," and "status codes" is his soul. Even if it feels cold to a reader, it is character-accurate.
*   **Do not remove David's cardinal directions.** Phrases like *"East-by-Northeast gate"* might feel clunky, but they are Arthur Silas Vance’s legacy living through David.
*   **Maintain the "wetness" of the prose.** The contrast between "tactical-grade fiber" and "anaerobic black peat" must remain. The grit is the point.

### 6. LINE-LEVEL EXAMPLES
*   **ORIGINAL:** *"Marcus Thorne braced his boots against a thick, moss-slicked limb sixty feet above the forest floor."*
*   **SUGGESTED:** **"Marcus braced his boots against a moss-slicked limb sixty feet up."**
*   **RATIONALE:** We know his last name from the chapter heading. "Forest floor" is redundant when you have "sixty feet up" and "swamp" in the next sentence.

*   **ORIGINAL:** *"She was a shadow among the leaves, her presence marked by the occasional metallic clink of a climbing nut or the sharp, tactical snap of a zip-tie."*
*   **SUGGESTED:** **"She was a shadow among the leaves, marked by the clink of a climbing nut and the snap of a zip-tie."**
*   **RATIONALE:** "Occasional" weakens the image. "Tactical" is used three times in the first four paragraphs—it's becoming a crutch word. Let the objects (zip-tie, climbing nut) be tactical by implication.

### VERDICT: PASS
(Once the "loseing" typos are swatted and the Sarah human/AI distinction is sharpened in the internal monologue, this is ready for the final polish.)