@copilot Which package would you recommend as good example for completing documentation of same-level missing package documentation ?

As an answer to this comment, give a list of those package with link to the example and reference to their possible application.

@copilot Which package would you recommend as good example for completing documentation of same-level missing package documentation ?

As an answer to this comment, give a list of those package with l...

Here's a categorized list of well-documented packages that can serve as templates for completing missing documentation at the same level:

Top-Level Package Examples (for agent/, api/, apiserver/, environs/, controller/, internal/, juju/)

Best comprehensive example:

• domain/doc.go (117 lines) - Exemplary architectural documentation with package layout, conventions, testing guidelines, and implementation notes. Perfect template for documenting major packages.

Good architectural examples:

• core/doc.go (65 lines) - Clear scope boundaries, import restrictions, migration paths
• rpc/doc.go (72 lines) - Protocol documentation with sequence flows, key components, client-server interaction
• cmd/doc.go (36 lines) - Explains key structs, usage patterns, design decisions

Application: Usedomain/doc.go as template for documentingagent/,api/,apiserver/,environs/ with architecture overview, package organization, conventions, and relationships.

Subdirectory/Utility Package Examples (for api/client/, api/common/, apiserver/facade/, etc.)

Domain service packages:

• domain/access/doc.go (20 lines) - Service purpose, key concepts, special behaviors
• domain/annotation/doc.go (17 lines) - Purpose with supported object types, use case explanation
• domain/resource/doc.go (37 lines) - Detailed domain context, resource types, relationships

Application: Use for documentingapi/client/,api/agent/,api/controller/ subdirectories - explain organization and purpose.

Worker Package Examples (for internal/worker/* subdirectories)

Excellent worker documentation:

• internal/worker/instancepoller/doc.go (79 lines) - Overview, responsibilities, behavior/polling strategy, services used, relationships with other workers
• internal/worker/dbaccessor/doc.go (74 lines) - Architecture with diagrams (ASCII art), component relationships, lifecycle management

Application: Template for documenting worker packages - explain purpose, behavior, services/dependencies, relationships.

Utility/Helper Package Examples (for internal/*, apiserver/common/, etc.)

Authentication/Authorization:

• apiserver/authentication/jwt/doc.go (33 lines) - Purpose, when it applies, authentication and authorization sections
• internal/auth/doc.go (17 lines) - Purpose, usage patterns, workflow

Infrastructure/Tools:

• internal/sshtunneler/doc.go (24 lines) - Concept explanation, high-level flow, usage pointer
• internal/featureflag/doc.go (18 lines) - Purpose, usage with example, initialization guidance
• internal/errors/doc.go (29 lines) - Purpose, usage patterns with code examples

Application: Template for utility packages ininternal/,apiserver/common/,api/base/ - clear purpose, usage patterns, examples where helpful.

Facade/API Package Examples (for apiserver/facades/, api/client/)

API facade with context:

• apiserver/facades/client/resources/doc.go (21 lines) - Purpose, main scenarios, version changes, related packages

Application: Use for documenting API facades - explain what APIs are exposed, typical scenarios, relationships.

Core Type Packages (for core/* subdirectories)

Type definition packages:

• core/model/doc.go (15 lines) - Explains key types and their purposes
• core/relation/doc.go (14 lines) - Type explanations with cross-reference to domain package
• core/securitylog/doc.go (47 lines) - Purpose, supported events, code examples with output

Application: Template for core type packages - explain types, relationships, usage examples.

Command/CLI Package Examples (for cmd/* subdirectories)

• cmd/juju/block/doc.go (77 lines) - Purpose, use cases, detailed command groupings
• internal/charm/hooks/doc.go (66 lines) - Comprehensive explanation of concepts, behavior, environment, best practices

Application: Template for command packages - explain command purpose, groupings, usage scenarios.

Special Purpose Examples

Tools/Agent binaries:

• environs/tools/doc.go (25 lines) - Historical context, purpose, external references, provider specifics

Testing packages:

• internal/container/lxd/testing/doc.go (6 lines) - Simple testing infrastructure explanation

Application: Reference for packages with special context needs.

Key Patterns to Follow

1. Start with clear purpose - "Package X provides/implements/defines..."
2. Add context - Why does this package exist? What problem does it solve?
3. Explain key concepts - List main types, operations, or behaviors
4. Show relationships - Reference related packages, dependencies
5. Include examples when helpful - Code snippets, command lists, ASCII diagrams
6. Document constraints - What should/shouldn't be in the package

Usedomain/doc.go (117 lines) as the gold standard for major architectural packages, and scale down appropriately for smaller utility packages (15-25 lines sufficient).