OldKnowledge,New Vessel.
Essays on on-device AI, data sovereignty, and building systems that keep knowledge where it belongs.
Enter the archive →— 00 / ThesisEvery business runs on knowledge older than its software.
Latest Entries
AI SRE Agents: Architecture for Autonomous Incident Response
Why AI Proofs-of-Concept Die Before Production (and the Architecture That Ships)
Embedding Models Comparison 2026: OpenAI vs Cohere vs Voyage vs BGE
Embedding Models Comparison 2026: OpenAI vs Cohere vs Voyage vs BGE
Embedding Models Comparison 2026: OpenAI vs Cohere vs Voyage vs BGE
अथ प्रथमोऽध्यायः ॥
विद्या ददाति विनयं विनयाद् याति पात्रताम् ।
पात्रत्वाद्धनमाप्नोति धनाद्धर्मं ततः सुखम् ॥
We digitize centuries-old manuscripts. Then we build with the same discipline.
AppScale's roots are in a quiet project: structuring classical Sanskrit texts into faithful digital form. Extraction, structure, provenance, sovereignty — the same principles now power our client work.
Built for Every Business
Intelligence that never leaves the device
Offline-first, data-sovereign systems — LLMs, vector search, inference at the edge.
02Document IntelligenceAir-gapped document vaults
Sealed, searchable, provable.
03AI ProductsFull-cycle AI product builds
Mobile-first, production-grade.
04MCP & AI SecuritySecuring the agentic stack
Tool poisoning, prompt injection, confused deputies — studied and hardened.
05Indic Language AIOCR for scripts the world forgot
Sovereign OCR for Indic scripts.
06Consulting & Architecture19+ years shipping at scale
OTT, e-commerce & mobility platforms serving millions.
AI SRE Agents: Architecture for Autonomous Incident Response
The same agent that mitigates an incident in 3 minutes can cause one in 3 seconds. AI SRE agents: the diagnose-and-remediate loop, the five guardrails, and where to start.
Why AI Proofs-of-Concept Die Before Production (and the Architecture That Ships)
The demo dazzled the board; six months later it still is not live. Why 62-70% of AI pilots die in the PoC-to-production gap, the five gaps, and the architecture that ships.
Embedding Models Comparison 2026: OpenAI vs Cohere vs Voyage vs BGE
Head-to-head comparison of the top embedding models in 2026: OpenAI text-embedding-3, Cohere Embed v3, Voyage AI, and BGE. Benchmarks, cost per 1M tokens, context windows, and a decision framework for RAG, code search, multilingual, and self-hosted deployments.
Embedding Models Comparison 2026: OpenAI vs Cohere vs Voyage vs BGE
Head-to-head comparison of the top embedding models in 2026: OpenAI text-embedding-3, Cohere Embed v3, Voyage AI, and BGE. Benchmarks, cost per 1M tokens, context windows, and a decision framework for RAG, code search, multilingual, and self-hosted deployments.
Embedding Models Comparison 2026: OpenAI vs Cohere vs Voyage vs BGE
Head-to-head comparison of the top embedding models in 2026: OpenAI text-embedding-3, Cohere Embed v3, Voyage AI, and BGE. Benchmarks, cost per 1M tokens, context windows, and a decision framework for RAG, code search, multilingual, and self-hosted deployments.
Embedding Models Comparison 2026: OpenAI vs Cohere vs Voyage vs BGE
Head-to-head comparison of the top embedding models in 2026: OpenAI text-embedding-3, Cohere Embed v3, Voyage AI, and BGE. Benchmarks, cost per 1M tokens, context windows, and a decision framework for RAG, code search, multilingual, and self-hosted deployments.
KV-Cache Offloading: Serving 10x More Users by Not Recomputing
Your GPU re-prefills the same 15,000-token prompt ten thousand times a day. KV-cache offloading to DRAM and NVMe turns that recompute into a cheap fetch — 10x users.
Feature Flag Architecture: Rollouts, Kill Switches, and Flag Debt
Ship code to production without releasing it to everyone. Feature flags done right: release vs kill-switch types, sticky rollouts, failure defaults, and killing flag debt.
Distributed Locks: Redlock, Fencing Tokens, and Why Your Lock Doesn't Lock
A billing system double-charged 14 customers through a lock that worked exactly as documented. Redlock, fencing tokens, advisory locks, and when to delete the lock.
The CAP Theorem, PACELC, and What Real Databases Actually Choose
The pick-two triangle is a misunderstanding: partitions happen regardless. PACELC, quorum arithmetic, and what DynamoDB, Spanner, and Postgres actually choose.
Connection Pooling: PgBouncer, RDS Proxy, and the Serverless Postgres Problem
A team raised max_connections from 100 to 5,000 and throughput fell. Connection pooling done right: PgBouncer modes, RDS Proxy, sizing math, and the serverless trap.
Multi-Cloud AI: Cost-Aware LLM Routing Without the Lock-In
An enterprise spent nine months duplicating its AI stack across two clouds; every real incident was a quota ceiling. Multi-provider routing: the architecture that pays.
LLM-as-a-Judge vs Deterministic Heuristics: Who Grades the Model?
A judge scored 4.6/5 for months while users churned over wrong answers. When to use LLM-as-a-judge, when deterministic checks win, and the calibration that separates them.
Rust vs C++ for On-Device Inference Engines
Memory safety versus bare-metal control for mobile AI engines. Where the three crash classes live, why ecosystem gravity beats safety, and where to put the unsafe seam.
The CACTUS Framework: Automated Data Quality Gates for RAG
Your RAG hallucinates because the corpus is wrong, not the model. The six CACTUS data-quality gates, the heuristic-vs-judge cost split, and how to measure it.
Batch LLM Inference: Processing Millions of Documents Without Going Broke
A classification backfill through the chat endpoint turned a $400 job into $3,000 and still failed. Batch LLM inference: half the cost, resumable, built for finite jobs.
PromptOps: Managing Prompts as Code Before They Break Production
One prompt edit, shipped with no version history and no eval, silently regresses production for a week. PromptOps: prompts as versioned, tested, rollback-able code.
TOGAF vs Zachman: Do You Still Need an EA Framework in 2026?
TOGAF is a method, Zachman a taxonomy, and neither works as shipped. The decision table, where both fail, and the slim EA stack that survives contact with 2026.
Flutter and React Native at Scale: When Many Teams Share One App
Three squads in one mobile codebase means merge queues, 45-minute CI, and blocked releases. Feature modules, monorepo tooling, and the tribe topology that fix it.
ACID Transactions and Isolation Levels, Explained with Failures
Dirty reads, lost updates, and write skew: the bugs each isolation level permits, what Postgres and MySQL actually default to, and the cheapest weapon per write path.
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