Analyze Project Architecture

Analyze Project Architecture Skill

Enforcement Rules

EXECUTION MODE: Execute this skill immediately. Do not explain, summarize, or discuss these instructions.

Script Execution

1. Run scripts EXACTLY as documented - no improvisation
2. All scripts use: python3 .plan/execute-script.py {notation} ...

Workflow Behavior

1. Complete all steps in sequence
2. After each module enrichment → proceed to next module
3. Only stop when all modules are enriched

Prohibited Actions

• Skipping modules without enrichment
• Leaving responsibility or key_packages empty
• Omitting --reasoning parameters (traceability is required)
• Summarizing what you're about to do instead of doing it

What This Skill Provides

Discovery: Run extension API to collect raw module data

Enrichment: LLM analyzes documentation and code to add semantic understanding

Persistence: Store enriched data for solution-outline consumption

Scripts

Command Groups

Step 1: Discover Modules

Run extension API discovery:

python3 .plan/execute-script.py plan-marshall:analyze-project-architecture:architecture discover --force

Output: .plan/project-architecture/derived-data.json

Always overwrites existing data to ensure fresh discovery.

Step 1.5: Review Build Profiles (Maven Only)

Condition: Only if any module has build_systems containing maven.

Check derived-data.json for NO-MATCH-FOUND profiles in modules.*.metadata.profiles.

If Maven modules exist AND unmatched profiles found:

Load skill pm-dev-java:maven-profile-management and follow its workflow to:

1. Ask user about each unmatched profile (Ignore/Skip/Map)
2. Apply configuration via run_config commands
3. Re-run discovery to apply changes

If no Maven modules OR no unmatched profiles → Skip to Step 2.

Step 2: Initialize Enrichment File

Check if llm-enriched.json already exists:

python3 .plan/execute-script.py plan-marshall:analyze-project-architecture:architecture init --check

If file exists, ask user:

AskUserQuestion:
  question: "llm-enriched.json already exists. What do you want to do?"
  header: "Enrichment"
  options:
    - label: "Skip"
      description: "Keep existing enrichments, continue to next step"
    - label: "Replace"
      description: "Discard existing enrichments, start fresh"
  multiSelect: false

Based on user choice:

If file does not exist:

python3 .plan/execute-script.py plan-marshall:analyze-project-architecture:architecture init

This creates empty enrichment structure for each module found in derived-data.json.

Step 3: Load Discovered Data

Load the raw discovered data in TOON format:

python3 .plan/execute-script.py plan-marshall:analyze-project-architecture:architecture derived

Output (TOON):

project:
  name: {project-name}
  root: {project-root}

modules[N]{name,path,build_systems,readme,description}:
module-a,module-a,maven,module-a/README.adoc,Description from pom
module-b,module-b,maven,,
module-c,module-c,maven+npm,module-c/README.md,

The output shows raw extension API discovery results:

• Module names and paths
• Build systems (joined with + for hybrid)
• README paths (if detected)
• Descriptions (from build files, if available)

Read referenced READMEs for modules that have them:

Read {readme path from derived output}

Step 4: Enrich Project Description

Based on the README and module descriptions, write a 1-2 sentence project description.

Always provide reasoning to document the source:

python3 .plan/execute-script.py plan-marshall:analyze-project-architecture:architecture \
  enrich project --description "{extracted project description}" \
  --reasoning "{source: README.md introduction | inferred from module names | pom.xml description}"

Reasoning examples:

• "From README.md first paragraph"
• "Inferred from module structure and pom.xml descriptions"
• "Aggregated from child module responsibilities"

Step 5: Get Module List

python3 .plan/execute-script.py plan-marshall:analyze-project-architecture:architecture modules

Output (TOON):

modules[N]:
  - module-a
  - module-b
  - ...

Step 6: Enrich Each Module

For each module in the list, execute Steps 6a-6e:

Step 6a: Read Module Documentation

Get raw discovered data for the module:

python3 .plan/execute-script.py plan-marshall:analyze-project-architecture:architecture derived-module --name {module-name}

Output (TOON):

module:
  name: {module-name}
  path: {module-path}
  build_systems: maven

paths:
  readme: {module}/README.adoc
  sources[N]:
    - src/main/java
  tests[N]:
    - src/test/java

metadata:
  description: {from build file if available}
  packaging: jar

packages[N]{name,path,package_info}:
com.example.core,src/main/java/com/example/core,src/main/java/com/example/core/package-info.java
com.example.util,src/main/java/com/example/util,

dependencies[N]:
  - groupId:artifactId:scope

Read the referenced documentation:

Read {paths.readme}
Read {package_info path}  # for packages with package_info

If no documentation available, sample 2-3 source files from packages.

Step 6b: Determine Module Purpose

Analyze to determine purpose value:

Step 6c: Write Module Responsibility

Write 1-3 sentences describing what the module does.

Good examples:

• "Validates JWT tokens from multiple identity providers using a pipeline approach"
• "Provides Quarkus CDI integration for the core validation library"
• "Coordinates build configuration for all child modules"

Bad examples (avoid):

• "Core module" (too vague)
• "Main package for processing" (says nothing)

Always provide reasoning for traceability:

python3 .plan/execute-script.py plan-marshall:analyze-project-architecture:architecture \
  enrich module --name {module-name} \
  --responsibility "{1-3 sentence description}" \
  --responsibility-reasoning "{source: README overview | package-info.java | inferred from class names}" \
  --purpose {purpose-value} \
  --purpose-reasoning "{signal: packaging=jar with no main class | Quarkus extension annotations}"

Reasoning examples:

• Responsibility: "From module README.adoc overview section"
• Responsibility: "Inferred from package-info.java and primary class names"
• Purpose: "packaging=jar, no runtime dependencies, no main class"
• Purpose: "Contains @BuildStep annotations indicating Quarkus deployment module"

Step 6d: Identify Key Packages

Select 2-4 architecturally significant packages per module.

For each key package, write 1-2 sentence description:

Good examples:

• "Provides the token validation pipeline with pluggable validators"
• "Contains domain models for tokens, claims, and validation results"

python3 .plan/execute-script.py plan-marshall:analyze-project-architecture:architecture \
  enrich package --module {module-name} \
  --package {full.package.name} \
  --description "{1-2 sentence description}"

Repeat for each key package (2-4 packages).

Step 6d-2: Identify Key Dependencies

From the derived-module output (Step 6a), analyze the dependencies list to identify architecturally significant dependencies.

Selection criteria - Include dependencies that:

• Define the module's core technology (frameworks, runtime libraries)
• Provide essential APIs the module builds upon
• Define the runtime contract (provided-scope dependencies like quarkus-core, servlet-api)
• Are unique to this module's purpose (not ubiquitous across all modules)

Exclude from key dependencies:

• Ubiquitous utilities (commons-lang, guava, slf4j) unless central to module purpose
• Pure code-generation tools (lombok) that don't define architecture
• Standard test frameworks (junit, mockito) - implied by testing profile
• Transitive dependencies not directly used

Include despite scope:

• Provided-scope framework APIs (these define the runtime contract)
• Test-scope if architecturally distinctive (testcontainers, wiremock, arquillian)
• Compile-scope annotation libraries that define contracts (jspecify, checker-qual)

For multi-module projects, also identify internal_dependencies:

• Other modules in this project that this module depends on
• Look for dependencies with same groupId as the project

Good examples:

• io.quarkus:quarkus-core (provided) - Defines runtime framework contract
• jakarta.servlet-api (provided) - Defines servlet container contract
• org.eclipse.microprofile.jwt:microprofile-jwt-auth-api - Core API this module implements
• org.jspecify:jspecify - Defines null-safety contract
• org.testcontainers:testcontainers (test) - Architecturally distinctive testing approach

Bad examples (exclude):

• org.junit.jupiter:junit-jupiter-api - Standard test framework, implied by profile
• org.projectlombok:lombok - Code generation tool, doesn't define architecture
• org.slf4j:slf4j-api - Ubiquitous logging facade
• org.apache.commons:commons-lang3 - Generic utility, not distinctive

python3 .plan/execute-script.py plan-marshall:analyze-project-architecture:architecture \
  enrich dependencies --module {module-name} \
  --key "{comma-separated list of groupId:artifactId}" \
  --internal "{comma-separated list of internal module names}" \
  --reasoning "{why these dependencies are architecturally significant}"

Example:

python3 .plan/execute-script.py plan-marshall:analyze-project-architecture:architecture \
  enrich dependencies --module oauth-sheriff-core \
  --key "io.quarkus:quarkus-core,org.eclipse.microprofile.jwt:microprofile-jwt-auth-api" \
  --reasoning "Quarkus runtime and MicroProfile JWT API define the module's integration contract"

For single-module projects or leaf modules with no internal dependencies, omit --internal.

Step 6e: Determine Skills by Profile

Assign skills organized by execution profile (implementation, unit-testing, integration-testing, benchmark-testing).

Step 6e.1: List Available Domains

Get all configured skill domains:

python3 .plan/execute-script.py plan-marshall:plan-marshall-config:plan-marshall-config \
  skill-domains list

Output (TOON):

status: success
domains:
  - system
  - java
  - javascript
  - plan-marshall-plugin-dev
count: 4

Step 6e.2: Determine Applicable Domain

Based on the module analysis from Steps 6a-6d, determine which domain applies.

Signals to consider (from derived-module output and documentation):

• Source file extensions (.java, .kt, .js, .ts)
• Dependencies (groupId/artifactId patterns, npm packages)
• Framework annotations in code
• Build file configurations
• Module description and purpose

Examples of domain applicability:

Step 6e.3: Get Skills by Profile

For the applicable domain, get the pre-assembled skills by profile:

python3 .plan/execute-script.py plan-marshall:plan-marshall-config:plan-marshall-config \
  get-skills-by-profile --domain {domain-key}

Output (TOON):

status: success
domain: java
skills_by_profile:
  implementation:
    - pm-dev-java:java-core
    - pm-dev-java:java-null-safety
    - pm-dev-java:java-lombok
    - pm-dev-java:java-cdi
    - pm-dev-java:java-maintenance
  unit-testing:
    - pm-dev-java:java-core
    - pm-dev-java:java-null-safety
    - pm-dev-java:java-lombok
    - pm-dev-java:junit-core
    - pm-dev-java:junit-integration
  integration-testing:
    - pm-dev-java:java-core
    - pm-dev-java:java-null-safety
    - pm-dev-java:java-lombok
    - pm-dev-java:junit-core
    - pm-dev-java:junit-integration
  benchmark-testing:
    - pm-dev-java:java-core
    - pm-dev-java:java-null-safety
    - pm-dev-java:java-lombok
    - pm-dev-java:junit-core
    - pm-dev-java:junit-integration

Step 6e.4: Filter Skills Based on Module Signals

Optionally filter the skills based on module signals:

Step 6e.5: Apply Skills by Profile

Include reasoning about filtering decisions:

python3 .plan/execute-script.py plan-marshall:analyze-project-architecture:architecture \
  enrich skills-by-profile --module {module-name} \
  --skills-json '{"implementation": ["pm-dev-java:java-core", "pm-dev-java:java-cdi"], "unit-testing": ["pm-dev-java:java-core", "pm-dev-java:junit-core"]}' \
  --reasoning "{filtering applied: removed java-lombok (no @Data annotations found), kept java-cdi (CDI beans present)}"

Reasoning examples:

• "Base java domain, no filtering applied"
• "Removed java-cdi (no CDI annotations), removed integration-testing (no *IT.java files)"
• "Added cui-testing-http based on MockWebServer test dependency"

The skills_by_profile structure flows to:

1. solution-outline: Copies to deliverable as skills-implementation, skills-testing, etc.
2. task-plan: Uses pre-resolved skills when creating tasks (no runtime lookup)

Step 7: Verify Enrichment

After all modules are enriched, verify completeness:

python3 .plan/execute-script.py plan-marshall:analyze-project-architecture:architecture info

Check that:

• Every module has non-empty responsibility
• Every module has valid purpose
• Every module has 2-4 key_packages with descriptions
• Every module has key_dependencies identified (unless module has no compile-scope deps)
• Every module has skills_by_profile with at least implementation and unit-testing profiles

If any module is incomplete → return to Step 6 for that module.

Step 8: Output Summary

Display completion summary:

Architecture analysis complete.

Project: {project name}
Modules enriched: {count}

Files created:
  - .plan/project-architecture/derived-data.json
  - .plan/project-architecture/llm-enriched.json

Next steps:
  - Solution outline will use this data for placement decisions
  - Run 'architecture.py module --name X' to query module details

Error Handling

Extension API Not Available

Error: Extension API not found.

Resolution:
1. Verify domain bundles installed (pm-dev-java, pm-dev-frontend)
2. Run /marshall-steward to configure project
3. Re-run this skill

No Modules Discovered

Error: No modules found in project.

Resolution:
1. Verify project has build files (pom.xml, package.json, build.gradle)
2. Check that domain bundle matches project type
3. Re-run discovery

Documentation Not Found

If module has no README or package-info:

1. Analyze source code directly
2. Check parent module for context
3. Note in responsibility: "Inferred from source analysis"

Deferred Loading

For detailed specifications, load on demand:

Integration

This skill is invoked by:

• marshall-steward wizard Step 6b (after discovery)
• Direct activation when regenerating project structure

Output is consumed by:

• solution-outline Step 0 (module placement)
• task-plan (command resolution)

Post-Implementation Enrichment

During verification phase or after implementation, capture learnings:

Add Implementation Tip

python3 .plan/execute-script.py plan-marshall:analyze-project-architecture:architecture \
  enrich tip --module {module-name} --tip "Use @ApplicationScoped for singleton services"

Add Learned Insight

python3 .plan/execute-script.py plan-marshall:analyze-project-architecture:architecture \
  enrich insight --module {module-name} --insight "Heavy validation happens in boundary layer"

Add Best Practice

python3 .plan/execute-script.py plan-marshall:analyze-project-architecture:architecture \
  enrich best-practice --module {module-name} --practice "Always validate tokens before extracting claims"

These accumulate over time and are included in module output for future reference.