Writing rods: modular, reusable textual scaffolds that channel composition through constrained, deliberate elements. Each rod defines a single operative unit—tone, tension, image density, rhythm, or viewpoint—then composes them into a controllable sequence. Structure begins with a rod order, establishing macro-trajectory: premise rod, stakes rod, scene rod, and turn rod. Next, micro-constraints tighten execution: line-length rod, sensory-load rod, verb-tempo rod, and sentence-fragment rod. Rather than allowing freeform drift, rods enforce continuity by governing transitions, causality cues, and escalation frequency. Revision proceeds by swapping rods, not rewriting everything: replacing a passive-lean rod with an active-lean rod, increasing metaphor rod intensity, adjusting paragraph break rod frequency, or rebalancing exposition rod proportion. Measurement integrates style telemetry—read-speed targets, clause density, repetition tolerance, and variation index—so output can be tuned without losing intent. Output favors coherence under pressure: scenes remain anchored through time-stamp rod, location rod, and character-consistency rod. Emotional modulation is achieved through tension-curve rod and release rod alternation, ensuring momentum. For genre control, specialized rods codify expectations—noir shadow rod, epic cadence rod, or romance restraint rod—while preserving originality through parameterized substitutions. End state: polished prose that behaves predictably under constraints, supports rapid iteration, and retains authorial voice through consistent rod signatures.