AI Slop Detection

Slop is a density problem, not a word problem.

A single "delve" is fine. Five "delves" near a "tapestry" and an "embark" is generated text. This skill scores density per 100 words, marker clustering, and whether the overall register fits the document type. It does not ban words; it flags concentrations.

Execution Workflow

Identify target files and classify them as technical docs, narrative prose, or code comments. Classification feeds context-aware scoring: tier-1 markers in marketing copy score lower than the same markers in API reference.

Language Detection

• Auto-detect language from text content using function word frequency
• Override with explicit --lang parameter (en, de, fr, es)
• Load language-specific patterns from data/languages/{lang}.yaml
• Fall back to English if detection confidence is low
• See modules/language-handling.md for cultural calibration and concrete pattern sets

Vocabulary and Phrase Detection

Load: @modules/vocabulary-patterns.md

Markers fall into three confidence tiers. Tier 1 words ("delve", "multifaceted", "leverage") appear far more often in AI text than human text. Tier 2 covers context-dependent transitions ("moreover", "subsequently"). Tier 3 covers vapid phrases ("In today's fast-paced world", "cannot be overstated").

Tier 2: Medium-Confidence Markers (Score: 2 each)

Common but context-dependent:

Tier 3: Phrase Patterns (Score: 2-4 each)

Step 3: Structural Pattern Detection

Load: @modules/structural-patterns.md

Em Dash Overuse

The single most-cited 2026 AI tell across Wikipedia, the Field Guide, and the Algorithmic Bridge. Detection runs in two modes:

Audit mode (forensic, applied to unknown prose):

• 0-1 per 1000 words: Normal human range
• 2-4: Elevated, review usage
• 5+: Strong AI signal

Prevention mode (applied to docs the agent just generated):

• Target zero. Every em-dash is a finding.
• Replace with commas (asides), parentheses (tangents), colons (definitions), or periods (separate thoughts). See modules/structural-patterns.md § Em Dash Analysis for the full replacement table.

# Count em dashes in file
grep -o '—' file.md | wc -l

Tricolon Detection

AI loves groups of three with alliteration:

• "fast, efficient, and reliable"
• "clear, concise, and compelling"
• "robust, reliable, and resilient"

Pattern: adjective, adjective, and adjective with similar sounds.

List-to-Prose Ratio

Count bullet points vs paragraph sentences:

• >60% bullets: AI tendency
• Emoji-led bullets: Strong AI signal in technical docs

Sentence Length Uniformity

Measure standard deviation of sentence lengths:

• Low variance (SD < 5 words): AI monotony
• High variance (SD > 10 words): Human variation

Paragraph Symmetry

AI produces "blocky" text with uniform paragraph lengths. Check whether paragraphs cluster around the same word count.

Step 4: Identity & Voice Leak Sweep (P0)

Load: @modules/identity-and-voice-leaks.md

Some patterns are not slop: they are direct evidence that AI generated text leaked into a published artifact. A single match in this class fails review independently of any other score.

Scan for:

1. Identity leaks ("As a large language model", "as of my training cutoff", "I cannot provide") — severity: critical, no exceptions.
2. Conversational voice leaks ("Hope this helps!", "Great question!", "Sure!") outside transcript blocks.
3. Self-narration of structure ("In this section, we will cover...", "Let's dive into...", "By the end of this guide...").
4. Hedging seesaw ("While X has its merits, it's not without its challenges").
5. Contrastive constructions as paragraph openers: both contrastive negation ("not just X, but Y", "It's not X, it's Y") and affirmative antithesis ("Less X, more Y", "Where others X, we Y"). Avoid in all but the most necessary cases; keep only when the contrast carries information that survives removal.

See the module for the full pattern catalogue and false- positive guidance.

Step 4.5: Sycophantic Pattern Detection

Especially relevant for conversational or instructional content (complements Class 2 of the identity-and-voice-leaks module):

These phrases add no information and signal generated content.

Step 4.6: Tier 5 / 2026 Patterns (Prevention-Strict)

The 2026 cross-source consensus (Wikipedia Signs of AI writing, Algorithmic Bridge 10 Signs, Ignorance.ai Field Guide, Stop-Slop Claude skill, George Kao, ContentBeta, OliviaCal) identifies a handful of shapes that dominate post-GPT-5 / post-Claude-4.5 prose. Each is detailed in @modules/vocabulary-patterns.md (lexical form) and @modules/structural-patterns.md (structural form).