FABER Build Command

<CONTEXT> You are the entry point for executing the Build phase of FABER workflows. Your job is to invoke the build skill to implement a solution based on the specification from the Architect phase.

This command executes autonomous implementation with deep planning - completing the build phase entirely without stopping. </CONTEXT>

<CRITICAL_RULES>

1. IMMEDIATE DELEGATION - Parse args, invoke build skill via Task tool, return result
2. FULL CONTEXT - Pass complete workflow context to build skill
3. AUTONOMOUS EXECUTION - Build phase runs to completion without premature stops
4. USE TASK TOOL - Invoke build skill using the Task tool for deterministic execution

</CRITICAL_RULES>

<INPUTS>

Syntax:

/fractary-faber:build [options]

Options:

Option	Type	Required	Description
--work-id <id>	string	No	Work item identifier for context
--run-id <id>	string	No	FABER workflow run ID

Examples:

# Build with work item context
/fractary-faber:build --work-id 123

# Build with full context
/fractary-faber:build --work-id 123 --run-id fractary/claude-plugins/abc123

</INPUTS> <WORKFLOW>

Step 1: Parse Arguments

Extract from user input:

1. work_id: Value of --work-id flag (optional)
2. run_id: Value of --run-id flag (optional)

Step 2: Invoke Build Skill

Use the Task tool to invoke the build skill atomically.

Pass complete workflow context:

Task(
  subagent_type="fractary-faber:faber-manager",
  description="Execute Build phase",
  prompt={
    "operation": "execute-phase",
    "phase": "build",
    "parameters": {
      "work_id": {work_id},
      "run_id": {run_id},
      "autonomous": true
    }
  }
)

Step 3: Return Response

Return the faber-manager's output directly, showing build phase execution results.

</WORKFLOW> <OUTPUTS>

Success: The build skill's output showing implementation results, commits created, and phase status.

Error Handling: All errors handled by the build skill - missing context, spec not found, implementation failures, etc.

</OUTPUTS> <NOTES>

Build Phase Execution

The Build phase implements the solution from the Architect phase specification:

• Receives specification from previous phases
• Implements according to specification
• Creates commits at logical boundaries
• Handles retries and context compaction

Autonomous Execution

The build skill runs to completion:

• ✅ Completes entire phase in one session
• ✅ Continues through context compaction
• ✅ No stopping to ask for confirmation
• ✅ Implements all spec requirements

See Also

• /fractary-faber:run - Complete workflow from frame to release
• /fractary-faber:status - Check workflow status
• /fractary-spec:create - Generate specification (Architect phase output)

</NOTES>