Inventory, supplier lead-times, and incident notes are synthetic.
Forecasts use the public Hyndman carparts benchmark. SEC filings are real Applied Materials disclosures.
AGENT EXECUTION
RUNNING
QUERY
DIAGNOSIS
TRACED
RECOMMENDED ACTION
CITATIONS
AUDIT TRAIL
▼ expand
RUNTIME ERROR
// FABOPS COPILOT
Parts catalog
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// FABOPS COPILOT
Browse parts
18 real parts from the seeded DynamoDB corpus, grouped by the driver the agent should identify. Click any row to run the agent against that part.
// FABOPS COPILOT
How it works
§1 · WHAT IT IS
FabOps Copilot diagnoses why a fab service part is at risk of stockout and recommends one of four actions. It's a LangGraph agent with seven tool functions, running an 8-node fast path in production (with an optional 9th verify-retry node behind an env flag). It doesn't just call an LLM, it pulls real numbers from DynamoDB, grounds its reasoning in SEC EDGAR filings and FRED macro signals, and produces an audit trail every step.
§2 · THE FOUR DRIVERS
POLICY DRIFT
Reorder point was computed against old demand. The number is stale, not wrong. Action: refresh the policy.
SUPPLY RISK
A supplier is degrading: lead-time slipping, on-time delivery dropping. Action: expedite or qualify a backup.
DEMAND SHIFT
Real demand has stepped up, visible in the forecast and corroborated by macro signals or filings. Action: place a reorder at the new run-rate.
NONE
Numbers are noisy but no real driver. Action: monitor. Critical: agents that always find a problem are useless.
§3 · THE 9-NODE GRAPH
1. entry // parse query, identify part + site2. check_policy_staleness // fabops_policies โ staleness_days3. check_demand_drift // croston forecast vs actuals4. check_supply_drift // supplier history โ degrading?5. ground_in_disclosures // SEC EDGAR + FRED retrieval6. diagnose // gemini-flash, pick the driver7. prescribe_action // driver โ one of 4 actions8. verify // optional cross-check (gated)9. finalize // emit answer + citations + audit
Every node writes to a DynamoDB audit spine, so every claim the agent makes is traceable to the tool call that produced it.
§4 · WHAT'S REAL, WHAT'S NOT
REAL
SEC EDGAR filings (Applied Materials 10-K and 10-Q) · FRED macro indices · Hyndman carparts demand benchmark · Gemini embeddings · the agent itself
SYNTHETIC
Inventory levels · supplier lead-times · incident notes · the part catalog. Generated to exercise all four driver paths cleanly.