GENERATIVE AI CORE
Building Quality Generative AI Capabilities

GENERATION MATURITY LADDER

G0 → G5 with the diagnostic build path — each step escalates only on demonstrated failure of the previous one.

START SIMPLE
CUSTOMIZE
G0Basic Prompting
Plain promptSimple Q&A, classification, drafting
G1Engineered Prompts
+ CoT, few-shot, templatesReasoning, reliability, repeatability
G2Structured Output
+ JSON, schemas, typedNeed validated data, not free text
G3Function Calling
+ Tool invocation (single)Model should trigger APIs
G4Retrieval-Augmented
+ RAG / groundingNeed domain facts or current info
G5Fine-Tuned / Custom
+ LoRA, RLHF/DPOStyle / behavior, not knowledge
1
Start with a PromptPlain zero/few-shot prompt
Wrong format or inconsistent?
2
Engineer the PromptCoT, templates, decomposition
Need typed output?
3
Structured OutputJSON mode, schemas, validation
Need to trigger actions?
4
Function CallingModel invokes tool / API
Wrong facts or missing data?
5
Add RAGRetrieve & ground in domain data
Style / tone still off?
6
Fine-TuneLoRA, PEFT, RLHF/DPO
Key Principle:
"Prompting is 80% of the game — master it before reaching for fine-tuning"
Diagnose first: bad prompt, wrong context, or wrong model?

GROUNDING SPECTRUM

Factuality Axis — From Creative Generation to Verified Claims

MORE CREATIVE
MORE FACTUAL
UngroundedFree-form creative generation
AttributedCites sources inline
GroundedRefuses when unsure
VerifiedEvery claim fact-checked
Favor Creative:
Creative / Marketing
Brainstorming
Ideation
Favor Factual:
High Stakes
Regulated / Legal
Audit Required
Must Be True

CAPABILITY REFERENCE

The 11 pillars that implement every G-tier · Click any tile for component details

GenAI
Use Cases
Cross-cutting

GenAI Use Case Patterns

G4 · RAG

Knowledge & Context

G0 · G1

Prompt Engineering

G2 · G3

Input/Output

Cross-cutting

Response Quality

Cross-cutting

Evaluation & Testing

Cross-cutting

Model Orchestration

Cross-cutting

Human-AI Interaction

Cross-cutting

Safety & Guardrails

Cross-cutting

GenAI Operations

G5

Fine-Tuning

Quality
Outputs

RAG DEEP DIVE — FROM NAIVE TO ADVANCED

Where most GenAI projects actually fail · Escalate only when the previous tier can't explain the failure

R0Naive RAG
Chunk → embed → top-k → stuff
Prototype, simple docs
Fixed chunks
Single embed model
Top-k vector
Stuff into context
R1Tuned Retrieval
Chunking · hybrid · filters
Retrieving wrong stuff
Semantic / parent-child chunks
Hybrid (dense + BM25)
Metadata filters
R2Reranked
Cross-encoder · MMR
Top-k ≠ top-ranked
Cross-encoder rerank
MMR diversity
LLM-as-reranker
R3Query-Aware
Rewrite · HyDE · decompose
Query-doc mismatch
Query rewriting
HyDE
Multi-query expansion
Decomposition
R4Tuned Retriever
Fine-tuned embeddings
Generic embeds miss domain
Domain-tuned embeddings
Contrastive learning
Custom reranker
R5Advanced Patterns
Hierarchical · graph · agentic
Single-shot unfit
Hierarchical RAG
Graph RAG
Agentic RAG (iterative)
Long-context RAG
RAG Ops (applies to all tiers):
Eval: RAGAS · MRR · NDCG · Recall@k
Citation & Attribution
Refusal When Unsure
Index Freshness & Lineage

ANTI-PATTERNS TO AVOID

Common mistakes that make generative systems hallucinate, drift, or burn cash

Blind Fine-Tuning

Fine-tuning when a better prompt would have worked

Exhaust prompt engineering first

RAG Without Evals

Shipping retrieval with no golden dataset

Define eval data before retrieval code

Temperature Roulette

Temperature 1.0 on factual queries

Low temp for facts, high for creative

Bigger Model Fallacy

Reaching for a bigger model to fix a prompt issue

Diagnose: prompt, context, or model?

Launch Without a Judge

No LLM-as-judge or human eval pre-production

Build an eval harness before shipping

Prompt Spaghetti

Giant system prompt with conflicting instructions

Decompose: one prompt, one job

RAG Without Reranking

Top-k dumped straight into context, no rerank

Always add a reranker above naive RAG

Hallucination Denial

No refusal behavior — model confidently makes things up

Teach the system to say “I don’t know”

Index Staleness

RAG corpus never refreshed after launch

Treat index freshness as a first-class metric

Quality-First
Grounded
Transparent
Safe
Cost-Effective
Generative AI Core - AI Transformation Framework

© 2026 Ramesh Kaluri. All Rights Reserved.