Plumbob LLC · Platform & Products in Active Development
Grounding AI in deterministic execution.
Build the Product. Plumbob owns the execution machinery.
Products submit work through one durable boundary. Plumbob handles immutable inputs, model execution, recovery from uncertain outcomes, spend limits, provenance, cancellation, and erasure—and is being extended toward multi-step programs, grounded research, independent evaluation, and controlled actions.
More than model invocation: higher-order capabilities for multi-step AI systems, built above an immutable execution kernel.
Plumbob is being built so Products can submit intent rather than orchestrate infrastructure. The platform owns the distributed execution required to fulfill that work: immutable inputs, pinned model and workload releases, durable recovery, bounded spend, provenance, cancellation, and erasure.
Above that execution kernel, Plumbob is developing reusable higher-order capabilities for multi-step AI systems:
Idempotent Kernel
Execution Envelopes
A Product submits immutable input under one idempotency identity. Plumbob owns Artifact admission, workload execution, retries and recovery, provider attempts, spend limits, cancellation, and erasure underneath it.
Orchestration Graphs
Released Multi-Step Programs
Products can compose immutable Workloads, search operations, and evidence acquisition into bounded directed acyclic graphs (DAGs) without turning the model itself into an unrestricted runtime orchestrator.
Provenance Capture
Grounded Research & Evidence
Search discovers candidate sources; Plumbob retrieves exact source bytes itself, records cryptographic provenance, and distinguishes model claims from evidence that the platform actually observed.
Separation of Concerns
Independent Evaluation
A Product can use separately released Workloads to evaluate outputs produced by other Workloads, preserving both results and their provenance rather than asking the same model to self-certify.
Controlled Loops
Bounded Adaptive Execution
Future loops and repair paths have declared iteration, operation, time, and spend ceilings. A model may select among released choices; it cannot invent new runtime authority.
Consequential Actions
Controlled Effects
Longer term, Plumbob can turn consequential external actions into immutable commands with explicit authorization, idempotency, uncertain-outcome reconciliation, and optional human release.
First Product Integration — In Development
Cremaflow: Real-World Physical Telemetry
Cremaflow is the first Product being built to consume Plumbob's execution platform, bringing nuanced reasoning to espresso telemetry without compromising local deterministic truth.
First Product Built on Plumbob · In Development
Cremaflow: Real-World Physical Telemetry & Grounded AI
Claude is the first frontier model integrated into Plumbob's live execution kernel. Cremaflow is the first Product being built to consume that capability.
Its espresso telemetry, replay, analysis, and live guidance remain deterministic and local. When the user explicitly requests AI analysis, Cremaflow freezes the relevant evidence, sends that immutable request through Plumbob, and treats Claude's result as provenance-tracked advisory output subject to deterministic Product validation.
Deterministic physical system→Immutable evidence→Bounded Claude execution→Deterministic validation→Advisory user experience
LOCAL RUNTIMEDocker · Python 3.14 · SQLite
HARDWARE LOOPESPHome BLE · 50 Hz Telemetry
AI WORKLOADSSession Review · Recipe Drafts (M7C)
ADVISORY SAFETYDeterministic Advisory Validation
DOSE18.0 g
YIELD36.2 g
TIME28.4 s
AVG PRESSURE8.4 bar
RATIO1:2.01
Pressure (bar)
Flow Rate (ml/s)
Yield (g)
Raw sensor observations acquired at 50 Hz locally via BLE. Replay and extraction engines execute deterministically on-device without cloud dependencies.
Execution Kernel
How Plumbob Executes Work
A product-facing execution boundary that isolates applications from the distributed-systems complexity of frontier AI.
Products submit work instead of orchestrating storage, runs, and recovery.
A Product submits intent under one tenant-bound credential. Plumbob derives authority, enforces rate and flood protections, and admits immutable inputs without leaking underlying storage or machine mechanics.
System Guarantees
Non-Negotiable Engineering Guarantees
The guarantees enforced by database triggers, write leases, CI verification gates, and architectural linting across all Plumbob systems.
Atomic Spend Reservations
Worst-case cost reservations before provider dispatch
Every live execution atomically reserves estimated spend in micro-USD against Product and Tenant monthly ceilings before invocation. If a request cannot fit within budget, it fails immediately without reaching the provider. Retries have a strict limit of 0.
Exact-Bytes Authorization
Cryptographic binding to SHA-256 byte digests
User egress consent authorizes the exact immutable admitted body hash, selected privacy classes, and actor. Attempting to upload altered bytes under the same authorization triggers an immediate conflict error.
No Hallucinated Authority
Advisory outputs downstream of canonical truth
Probabilistic AI outputs are strictly advisory. A model can never mutate canonical domain state, edit SQLite journal tables, publish recipes automatically, or trigger physical machine actions without explicit user review.
Deterministic Foundation First
100% offline edge operability
Physical sensor acquisition, deterministic extraction algorithms, and live guidance run entirely local-first. Cloud infrastructure or external model provider outages never disrupt instrument operation or brewing.
Lineage-Aware Fenced Erasure
Fenced deletion markers across storage
Tenant content is retained only until erased. Calling DELETE /v2/artifacts/{id} triggers a cascading purge across all raw model outputs and derivative results in R2, leaving only immutable D1 audit metadata.
Model Pinning & Strict Schemas
JSON Schema 2020-12 enforcement
Execution policies pin exact provider model identifiers, gateway parameters, and strict JSON Schema definitions. Workloads reject silent prompt drift, non-conforming responses, and unverified model changes.
Company & Architectural Fit
Built for Frontier-Model Products
Plumbob LLC is an early-stage company established in 2025, based in Illinois, United States. We design and build execution infrastructure for AI-native software and edge systems.
Early-Stage Transparency: Plumbob Cloud and our initial products (including Cremaflow) are in active internal engineering. We are pre-commercial and under active development, focused entirely on distributed-systems rigor, deterministic validation, and safety.
WHY CLAUDE MATTERS TO OUR ARCHITECTURE
Deploying Frontier Models Responsibly
Deploying frontier models like Claude in real-world applications requires moving from “respond to a prompt” into software infrastructure:
Deterministic Evidence Boundaries: Claude receives immutable evidence bundles extracted from ground-truth local systems, never direct or unmetered database access.
Downstream Advisory Validation: Model outputs are treated as probabilistic hypotheses, verified by product-owned deterministic rules before reaching users or physical actuators.
Get in Touch
Inquiries & Technical Discussion
We welcome technical discussions with systems engineers, researchers, and prospective partners interested in durable execution for AI systems.