📚 Glossary — Terms, Symbols, and Short Definitions

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Retrieval Playbook · Patterns · Eval

Core instruments

ΔS (delta-S) — Semantic stress. ΔS = 1 − cos(I, G) where I is item embedding, G is ground/anchor.
Thresholds: <0.40 stable · 0.40–0.60 transitional · ≥0.60 high risk.
λ_observe — Layered observability state.
Symbols: → convergent · ← divergent · <> recursive · × chaotic.
E_resonance — Coherence indicator. Rolling mean of |residual| under BBMC; rising E with high ΔS ⇒ apply BBCR/BBAM.

BBMC — Boundary-Bounded Memory Chunks. Reduce semantic residue vs anchors; align chunks/sections with tasks.
BBPF — Branch-Bounded Prompt Frames. Explore multiple semantic paths safely; stabilize context windows.
BBCR — Break-Before-Crash Reset. Detect collapse, insert bridge node, restart cleanly.
BBAM — Attention Modulation. Reduce variance in attention to avoid entropy melt on long contexts.

RRF (Reciprocal Rank Fusion) — Fuse ranks from multiple retrievers via 1/(k + rank).
MMR (Maximal Marginal Relevance) — Diversify candidates balancing relevance and novelty.
BM25 — Sparse lexical scoring for exact term match; strong for code/IDs.
HyDE — Hypothetical document expansion; creates a synthetic query/doc to improve recall.
Cross-encoder reranker — Jointly encodes [query ⊕ doc] for precision@k gains.

SCU (Symbolic Constraint Unlock) — Model merges sources or violates “cite-then-explain” schema. Fix: per-source fences + locked schema.
Query Parsing Split — Dense and sparse retrievers use different analyzers/tokenizers; hybrid breaks.
Vectorstore Fragmentation — Index contains “ghost” gaps; facts exist but never retrieved; fix shard/id audits.
Memory Desync — State flips between sessions/tabs; require mem_rev+mem_hash.
Role Drift — Multi-agent persona swap; tag agent IDs and lock via BBCR.

Agent boundary — Contract that limits what an agent can read/write; prevents overwrite.
ΔS peer check — Measures divergence between agents’ plans to catch conflicts early.

Gold set — Small set (10–50) of realistic Q/A with citations; used for CI (recall@50, nDCG@10, ΔS).
Traceability — Provenance from answer → prompt → citations → chunks → source file.

I — item (retrieved chunk) embedding; G — ground/anchor embedding.
‖B‖ ≥ B_c — collapse threshold on residual magnitude (BBCR).
Convergent λ — layer is stable across paraphrases; divergent λ — layer is drifting.

Tool	Link	3-Step Setup
WFGY 1.0 PDF	Engine Paper	1️⃣ Download · 2️⃣ Upload to your LLM · 3️⃣ Ask “Answer using WFGY + <your question>”
TXT OS (plain-text OS)	TXTOS.txt	1️⃣ Download · 2️⃣ Paste into any LLM chat · 3️⃣ Type “hello world” — OS boots instantly

Layer	Page	What it’s for
⭐ Proof	WFGY Recognition Map	External citations, integrations, and ecosystem proof
⚙️ Engine	WFGY 1.0	Original PDF tension engine and early logic sketch (legacy reference)
⚙️ Engine	WFGY 2.0	Production tension kernel for RAG and agent systems
⚙️ Engine	WFGY 3.0	TXT based Singularity tension engine (131 S class set)
🗺️ Map	Problem Map 1.0	Flagship 16 problem RAG failure taxonomy and fix map
🗺️ Map	Problem Map 2.0	Global Debug Card for RAG and agent pipeline diagnosis
🗺️ Map	Problem Map 3.0	Global AI troubleshooting atlas and failure pattern map
🧰 App	TXT OS	.txt semantic OS with fast bootstrap
🧰 App	Blah Blah Blah	Abstract and paradox Q&A built on TXT OS
🧰 App	Blur Blur Blur	Text to image generation with semantic control
🏡 Onboarding	Starter Village	Guided entry point for new users

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