Scaffold Extension

Create a new extension package inside an existing framework's extensions/ directory.

Triggers

Alternate expressions and non-obvious activations (primary phrases are matched automatically from the skill description):

• "I need a new extension" → scaffold extension in specified framework
• "create an extension package" → prompt for name and parent framework
• "add Python support to sdlc-complete" → derive name=python, scaffold in sdlc-complete
• "new language extension" → clarify name and framework, scaffold

Trigger Patterns Reference

Pattern	Example	Action
Named scaffold	"scaffold extension python --to sdlc-complete"	Scaffold directly
Language extension	"add Go support to sdlc-complete"	Derive name=go, confirm
Interactive	"scaffold extension --interactive --to sdlc-complete"	Guided design mode
Target omitted	"scaffold extension typescript"	Ask which framework

Understanding Extensions

Extensions are language- or ecosystem-specific capability packages nested inside a framework. They augment framework agents and rules with toolchain-specific knowledge. Examples:

Extension	Framework	Provides
python/	sdlc-complete	Python testing patterns, type hint rules, pip/poetry guidance
javascript/	sdlc-complete	npm/pnpm workflows, ESLint integration, Jest patterns
github/	sdlc-complete	GitHub Actions, PR review workflows, release automation
terraform/	sdlc-complete	IaC patterns, state management, plan review agents

Extensions differ from addons:

• Extensions: Nested within a specific framework, language/ecosystem-scoped
• Addons: Standalone, cross-cutting, installed alongside any framework

Extensions cannot contain skills (skills require standalone functionality). They contain agents, rules, and templates scoped to their ecosystem.

Process

1. Parse Arguments

Extract from $ARGUMENTS:

• <name> — kebab-case extension name (required; often a language or ecosystem name)
• --to <framework> — parent framework directory name (required)
• --description "<text>" — short description (optional)
• --interactive — enable guided design questions

If either <name> or --to is missing, ask before proceeding.

2. Validate Parent Framework

Confirm the parent framework exists:

ls agentic/code/frameworks/<framework>/

Check if an extensions/ directory exists; if not, it will be created.

Check for name conflicts:

ls agentic/code/frameworks/<framework>/extensions/ 2>/dev/null

3. Interactive Design (if --interactive)

Ask before generating:

1. Ecosystem: What language, platform, or ecosystem does this extension target?
2. Capabilities: What ecosystem-specific capabilities does it add? (linting rules, test patterns, deployment agents)
3. Agents: What specialist agents should be scaffolded? (e.g., python-test-engineer, go-module-auditor)
4. Rules: What ecosystem-specific rules should be defined? (e.g., type safety, package management)
5. Templates: What ecosystem-specific document templates are needed?

4. Run Scaffolding

aiwg scaffold-extension <name> --to <framework> [--description "..."]

5. Customize Generated Files

manifest.json — The extension's registry entry:

{
  "name": "<name>",
  "version": "1.0.0",
  "description": "<ecosystem-specific capabilities>",
  "parentFramework": "<framework>",
  "agents": [],
  "rules": [],
  "templates": []
}

README.md — Document the ecosystem targeted, capabilities provided, and activation conditions.

6. Add Ecosystem-Specific Components

After scaffold:

# Add ecosystem-specific agent
aiwg add-agent <name>-specialist --to <framework>/extensions/<name>
# Note: --to path traversal not yet supported; create agent file directly

# Create agent file
# <framework>/extensions/<name>/agents/<role>.md

# Create rules
# <framework>/extensions/<name>/rules/<rule-id>.md

# Create templates
# <framework>/extensions/<name>/templates/<template>-template.md

7. Register with Parent Framework

Ensure the parent framework's manifest references the extension:

{
  "extensions": ["existing-extension", "<name>"]
}

The CLI tool handles this automatically.

Generated Structure

agentic/code/frameworks/<framework>/extensions/<name>/
├── README.md          # Extension documentation
├── manifest.json      # Extension configuration
├── agents/            # Ecosystem-specific agent definitions
├── rules/             # Ecosystem-specific rule files
└── templates/         # Ecosystem-specific document templates

Parent framework manifest updated: agentic/code/frameworks/<framework>/manifest.json

Output Format

Extension Created: <name>
─────────────────────────
Location: agentic/code/frameworks/<framework>/extensions/<name>/
Parent:    <framework>

Created:
  ✓ README.md
  ✓ manifest.json
  ✓ agents/
  ✓ rules/
  ✓ templates/

Parent manifest updated: <framework>/manifest.json

Next Steps:
  1. Edit README.md with ecosystem description
  2. Add ecosystem agents: create agents/<role>.md
  3. Add ecosystem rules:  create rules/<rule-id>.md
  4. Add templates:        create templates/<name>-template.md
  5. Deploy parent:        aiwg use <framework>

Examples

Example 1: Language extension

User: "scaffold extension python --to sdlc-complete"

Action:

aiwg scaffold-extension python --to sdlc-complete

Result: agentic/code/frameworks/sdlc-complete/extensions/python/ created with full structure. Parent manifest updated with "extensions": ["python"].

Example 2: Platform extension with description

User: "create a GitHub Actions extension for sdlc-complete"

Extraction: name=github-actions, target=sdlc-complete

Action:

aiwg scaffold-extension github-actions --to sdlc-complete \
  --description "GitHub Actions workflow generation and PR automation"

Example 3: Interactive extension design

User: "scaffold extension --interactive --to sdlc-complete"

Process: Guided questions identify ecosystem (e.g., Terraform), capabilities, agents (infrastructure-reviewer, plan-analyzer), and rules (state-management, variable-validation).

References

• @$AIWG_ROOT/agentic/code/addons/aiwg-utils/skills/devkit-create-extension/SKILL.md — Devkit equivalent (interactive design)
• @$AIWG_ROOT/src/cli/handlers/scaffolding.ts — CLI handler implementation
• @$AIWG_ROOT/docs/cli-reference.md — Full CLI reference
• @$AIWG_ROOT/agentic/code/frameworks/sdlc-complete/extensions/ — Existing extension examples