Integrate Graphify into a Gradle workflow: from knowledge graph to PlantUML diagram in one command

@startuml
skinparam backgroundColor #FEFEFE
skinparam ActivityBackgroundColor #FDEDEC
skinparam ActivityDiamondBackgroundColor #FFF3CD

start

:Architecture diagram created\n(manually, by hand);

:The code evolves\n(new classes, new dependencies);

:Obsolete diagram\n(no longer reflects the code);

if (Qui met à jour ?) then (Personne)
    :Misleading documentation;
    note right: New developers\nrely on it... and make mistakes
else (Quelqu'un)
    :Manual update\n(2-3 hours of work);
    note right: Already obsolete\nuntil the next PR
endif

stop

@enduml

@startuml
skinparam backgroundColor #FEFEFE
skinparam componentStyle rectangle

actor Développeur
component "Graphify\n(pip install graphifyy)" as Graphify
collections "graphify-out/graph.json\n(Knowledge Graph)" as KGJSON
component "PlantUML Gradle Plugin\n(generateKnowledgeGraphDiagram)" as Plugin
component "KnowledgeGraphParser" as Parser
component "KnowledgeGraphRenderer" as Renderer
component "PlantumlService\n(validation + rendering PNG)" as PS
collections "diagrams/knowledge-graph/\n(.puml + .png)" as Output

Développeur --> Graphify : graphify . --no-viz
Graphify --> KGJSON : extracts the structure\nof the source code
Développeur --> Plugin : ./gradlew generateKnowledgeGraphDiagram
Plugin --> Parser : parse(graph.json)
Parser --> Plugin : KnowledgeGraph\n(nodes + edges + communities)
Plugin --> Renderer : render(graph, filters)
Renderer --> Plugin : code PlantUML\ndeterministic
Plugin --> PS : validateSyntax + generateImage
PS --> Output : .puml + .png

note bottom of Plugin
Pipeline DÉTERMINISTE
No call LLM
Reproducible result
end note

@enduml

# Étape 1 : extraire le Knowledge Graph
graphify . --no-viz

# Étape 2 : générer les diagrammes PlantUML
./gradlew generateKnowledgeGraphDiagram

@startuml
skinparam backgroundColor #FEFEFE
skinparam componentStyle rectangle

package "Normal pipeline\n(user → diagrams)" as normal {
    [Fichier .prompt] as prompt
    [LlmService\n+ ApiKeyPool] as llm1
    [ProcessPlantumlPromptsTask] as task1
    [Diagramme PNG] as out1

    prompt --> task1
    task1 --> llm1
    llm1 --> out1
}

package "Knowledge Graph Pipeline\n(deterministic, no LLM)" as kg {
    [graphify-out/graph.json] as kgjson
    [KnowledgeGraphParser] as parser
    [KnowledgeGraphRenderer] as renderer
    [PlantumlService] as ps
    [Diagramme PNG\n(documentation du plugin)] as out2

    kgjson --> parser
    parser --> renderer
    renderer --> ps
    ps --> out2
}

package "Pipeline Dogfooding\n(LLM → plugin documentation)" as dogfood {
    [GraphifyPromptAdapter] as gpa
    [Fichiers .prompt\nauto-générés] as auto_prompt
    [LlmService\n+ ApiKeyPool] as llm2
    [ProcessPlantumlPromptsTask] as task2
    [Diagramme PNG\n(documentation LLM)] as out3

    kgjson --> gpa
    gpa --> auto_prompt
    auto_prompt --> task2
    task2 --> llm2
    llm2 --> out3
}

note "Same LlmService, same ApiKeyPool,\nsame PlantumlService\n— ZERO duplication" as N

@enduml

# Documentation déterministe (rapide, pas de LLM)
./gradlew generateKnowledgeGraphDiagram

# Documentation LLM (plus riche, consomme des tokens)
./gradlew generateDiagramDocs

@startuml
skinparam backgroundColor #FEFEFE
skinparam componentStyle rectangle

rectangle "Pipeline DÉTERMINISTE\n(generateKnowledgeGraphDiagram)" as det {
    [graph.json] as json
    [KnowledgeGraphParser] as parser
    [KnowledgeGraphRenderer] as renderer
    [PlantUML code] as puml

    json --> parser : parse
    parser --> renderer : KnowledgeGraph
    renderer --> puml : render (pure function)
}

rectangle "Pipeline LLM\n(processPlantumlPrompts)" as llm {
    [.prompt] as prompt
    [LlmService] as llmSvc
    [ChatModel] as model
    [PlantUML code] as puml2

    prompt --> llmSvc
    llmSvc --> model : API call
    model --> puml2 : non-deterministic response
}

note bottom of det
Same input → same output
No network latency
No token cost
Reproducible in CI
end note

note bottom of llm
Same input → variable output
Network latency (1-5s)
Token cost
Requires a key API
end note

@enduml

@startuml
skinparam backgroundColor #FEFEFE

participant "Developer" as Dev
participant "Gradle" as G
participant "GenerateKnowledgeGraphDiagramTask" as Task
participant "KnowledgeGraphParser" as Parser
participant "KnowledgeGraphRenderer" as Renderer
participant "PlantumlService" as PS
collections "graphify-out/graph.json" as JSON
collections "diagrams/knowledge-graph/" as Out

Dev -> G : ./gradlew generateKnowledgeGraphDiagram
G -> Task : execute
Task -> JSON : read
Task -> Parser : parse(`graph.json`)
Parser --> Task : KnowledgeGraph

alt filtres actifs
    Task -> Task : apply filters\n(community, edgeTypes, maxNodes…)
end

Task -> Renderer : render(graph, filters)
Renderer --> Task : code PlantUML

Task -> PS : validateSyntax()
alt valide
    Task -> PS : generateImage()
    PS --> Out : .puml + .png
else invalide
    Task -> Out : .puml (with warning)
end

@enduml

@startuml
skinparam backgroundColor #FEFEFE
skinparam componentStyle rectangle

package "EAGER\n(always loaded)" as eager {
    [PROMPT_REPRISE.adoc\n(contexte session)] as pr
    [INDEX.adoc\n(vue d'ensemble)] as idx
    [GRAPH_REPORT.adoc\n(~50 lignes)] as gr
}

package "LAZY — Strategy\n(on demand)" as lazy_strat {
    [Méthodologies] as meth
    [Archives sessions] as sessions
}

package "LAZY — Graphify\n(targeted queries)" as lazy_graph {
    [graph.json] as gj
    [Queries\n(query/path/explain)] as queries
}

package "Pipeline PlantUML\n(auto-generated)" as puml {
    [generateKnowledgeGraphDiagram] as kgTask
    [generateDiagramDocs] as ddTask
    [Diagrammes PNG] as diagrams
}

Agent --> eager : Read at the beginning of the session
Agent ..> lazy_strat : Load if type detected
Agent ..> lazy_graph : Query if structural need
kgTask --> diagrams : Deterministic
ddTask --> diagrams : Via LLM

note right of gr
Condensed Knowledge Graph
God nodes + communities
Replaces ECOSYSTEM_OVERVIEW
(225 lines → 50 lines)
end note

@enduml

# Script complet en 5 commandes
uv tool install graphifyy
cat > .graphifyignore << 'EOF'
*-context.yml
*.env
build/
.gradle/
EOF
graphify . --no-viz
./gradlew generateKnowledgeGraphDiagram
git add graphify-out/GRAPH_REPORT.adoc graphify-out/graph.json diagrams/knowledge-graph/

@startuml
skinparam backgroundColor #FEFEFE

rectangle "BEFORE" as avant {
    card "Hand-drawn diagrams\nAlways outdated\nNobody updates them" as av1 #FDEDEC
}

rectangle "AFTER" as apres {
    card "Automatically generated diagrams\nAlways up to date with the code\nVersioned in Git\nDeterministic and reproducible" as ap1 #E8F8E8
}

avant --> apres : graphify . --no-viz\n+ ./gradlew generateKnowledgeGraphDiagram

@enduml