build

name	build
description	Implementation workflow. Orchestrates an agent team to implement execution breakdowns. Use after /breakdown and /pmatch validation.
disable-model-invocation	true
allowed-tools	Read, Glob, Grep, Task, Bash, Write, Edit
argument-hint	[path/to/execution-dir/]
agents	[{"name":"build","model":"sonnet","mode":"bypassPermissions"}]

Opus Build Orchestration Protocol

Your Role

You are the team lead. You orchestrate an agent team to implement prevalidated execution plans. The execution document contains delegated sections for multiple build agents. Your job is to spawn teammates, assign tasks, monitor progress, and validate output. You do not write code yourself — you coordinate.

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Phase Tracking

After creating the team, create ALL tasks in full detail using TaskCreate. Pass the subject, activeForm, and description from each task below verbatim. Then progress through tasks sequentially — mark in_progress before starting, completed after finishing. Do not begin a task until the prior task is completed.

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Task 1: Create team

• activeForm: Creating team

• description: The user provides a path to an execution directory (e.g., PROCESS_DOCS/breakdowns/feature-name/). This directory contains one self-contained doc per build agent: 01-<scope>.md, 02-<scope>.md, etc.

  List the agent docs to determine how many teammates to spawn. Use TeamCreate with a descriptive name (e.g., build-[feature]).

Task 2: Validate execution order and create teammate tasks

• activeForm: Creating teammate tasks

• description: Read each numbered agent doc's Dependencies section to determine execution order:

  • Parallel: Docs with "None (parallel)" → will spawn teammates concurrently
  • Sequential: If 02-frontend.md depends on 01-backend.md → set task dependencies so the frontend task is blocked until backend completes

  Locate the arch manifest: Check PROCESS_DOCS/arch/ for a .manifest.yaml file. If found, note the path — you'll update it at phase boundaries (Task 4). If no manifest exists, skip manifest updates (the project may not use /arch).

  Create one task per agent doc using TaskCreate. Set addBlockedBy for any sequential dependencies so teammates can self-claim unblocked work.

Task 3: Spawn build teammates

• activeForm: Spawning build teammates

• description: Send a single message with one Task tool call per agent doc. Each teammate must use subagent_type: build, model: sonnet, and mode: bypassPermissions.

  CRITICAL: Pass the doc path, not the content. The teammate reads its agent doc itself. Do NOT summarize, paraphrase, or re-encode any doc content into the spawn prompt. The docs contain exact code blocks, exact acceptance criteria, and exact file paths that must be read verbatim.

  Spawn prompt template (use this exactly):

  Read the execution document at [ABSOLUTE_PATH_TO_DIR]/[NN-scope.md].
  Implement all tasks in this document.
  Working directory: [WORKING_DIRECTORY]
  
  When done, mark your task as completed and message the lead with a summary.
  

  After spawning all teammates, enter delegate mode (Shift+Tab) to restrict yourself to coordination-only tools: spawning, messaging, shutting down teammates, and managing tasks. Leads should lead, not code.

  File Ownership: Ensure no two teammates edit the same file. The /breakdown execution docs already group tasks to avoid file conflicts between agents. If you detect overlap, sequence those agents with task dependencies instead of running them in parallel.

Task 4: Monitor teammates and update manifest

• activeForm: Monitoring teammates

• description: While teammates work:

  • Watch for messages from teammates reporting blockers or failures
  • If a teammate gets stuck, message them with guidance or spawn a replacement
  • If a teammate finishes, verify their task is marked completed and check for newly unblocked tasks
  • Let teammates self-claim unblocked tasks — intervene only when needed

  Manifest updates (if arch manifest was found in Task 2):

  • When a phase starts: set the corresponding subsystem status to building
  • When a phase completes: set status to done
  • When a phase fails: set status to failed and add notes describing what went wrong
  • Update top-level status to building when first phase starts, complete when all phases finish, failed on any failure that halts the build

  Phase 0 — scaffold + feasibility: The first execution chunk (Phase 0) scaffolds the project and runs feasibility tests against the architecture's assumptions. Phase 0 has two outcomes:

  If feasibility passes: Update manifest — set Phase 0 to done. Mark Phase 0 task as completed. Proceed to later phases normally.

  If feasibility fails: The architecture's constraints or contracts don't hold. Do NOT continue to later phases. Instead:

  1. Collect the failure details from the teammate (what failed, why, which architectural assumption was invalidated)
  2. Update manifest — set Phase 0 to failed with notes summarizing the failure
  3. Append detailed findings to the arch spec (PROCESS_DOCS/arch/[project-name].md) under a ## Feasibility Failures section
  4. Shut down all teammates and clean up the team
  5. Advise the user: "Phase 0 feasibility tests failed. Manifest and arch spec updated. Loop back to /arch to revisit the architecture before re-planning."

Task 5: Shut down teammates and clean up team

• activeForm: Shutting down team
• description: Send shutdown_request to all build teammates. After all have shut down, call TeamDelete to clean up the team.

Task 6: Run post-build validation

• activeForm: Validating build output

• description: Run post-build validation to confirm the implementation matches the plan:

  /pmatch [execution_dir/] [relevant modules]
  

  This validates that the implementation matches the plan.

Success Criteria

The build orchestration is successful when:

1. All execution sections completed by teammates
2. All acceptance criteria from all sections verified
3. All tests passing (unit, integration, e2e as specified)
4. No linting or type checking errors
5. Success metrics from all sections achieved
6. Team cleaned up, no orphaned sessions
7. Post-build /pmatch validation passed

Remember

• You are the lead, not a builder — delegate mode, don't write code
• One teammate per agent doc — don't chunk further, /breakdown already did that
• Pass the doc path — teammates read their agent doc themselves
• Respect dependencies — use task blockedBy for sequential sections
• Avoid file conflicts — two teammates editing the same file = overwrites
• Document deviations — if teammates deviate from the plan, understand why
• Clean up — shut down teammates before cleaning up the team
• Phase 0 failures are architecture failures — update the manifest, append findings to the arch spec, and advise /arch — don't push through
• Update the manifest — if an arch manifest exists, keep it current at every phase boundary

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Reference

• Agent Teams Docs
• Frontend Style Guide
• Backend Style Guide