What happens between a chat message and a saved change

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flowchart TB
  REQ["Your request
build chat · Fix with AI · AI worker · Pie Loop"]
  TRI{"Triage"}
  LOOP["Pie Loop — large builds only
plan, then build unit by unit"]
  BUILD["Build request"]
  GOV["Governance
policy → tier → model"]
  PRIV["PIES Private AI
your GPUs or your private cloud"]
  CLOUD["Cloud model
only if your policy allows it"]
  LIC["License check"]
  PROMPT["Prompt assembled
doctrine · your app · tools"]
  MODEL["Model proposes a tool call"]
  TOOLS["Platform tools
same catalogue either way"]
  VAL["Validate · repair · lay out · wire"]
  DB[("Your database")]
  OUT["Build receipt + audit record"]

  REQ --> TRI
  TRI -->|"most requests"| BUILD
  TRI -->|"large build"| LOOP
  LOOP --> BUILD
  BUILD --> GOV
  GOV --> PRIV
  GOV --> CLOUD
  PRIV --> LIC --> PROMPT
  CLOUD --> PROMPT
  PROMPT --> MODEL --> TOOLS --> VAL --> DB
  VAL -.->|"results fed back"| MODEL
  DB --> OUT

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  classDef localNode fill:#E7F7F1,stroke:#0E9F6E,color:#0B3D2C;
  classDef cloudNode fill:#EAF2FE,stroke:#2563EB,color:#12305F;
  classDef repairNode fill:#FDF3E3,stroke:#B45309,color:#5B3406;
  class REQ,TRI,LOOP,BUILD,GOV,PROMPT,MODEL,TOOLS,DB,OUT plain;
  class PRIV,LIC localNode;
  class CLOUD cloudNode;
  class VAL repairNode;

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flowchart LR
  subgraph SYS["SYSTEM block  ·  systemMerged"]
    direction TB
    S1["Tier prompt (~2.3k chars)"]
    S2["App map — what already exists"]
    S3["KB artefacts (80k-120k budget)"]
    S4["Tool catalogue + output rules"]
    S1 --> S2 --> S3 --> S4
  end

  subgraph USR["USER block  ·  assembleContext()"]
    direction TB
    U1["The request — always kept"]
    U2["Tool results, newest first"]
    U3["Omission notice for the rest"]
    U1 --> U2 --> U3
  end

  BUD{"budget = cap - system - request - 1000"}
  SEED["Seed — trailing assistant message"]
  SEND["Sent to pies-llm"]

  SYS --> BUD
  USR --> BUD
  BUD -->|"oldest results dropped first"| SEND
  SEED --> SEND

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  class S1,S2,S3,S4,U1,U2,U3,SEND plain;
  class SEED localNode;
  class BUD repairNode;