tomevault-io Subagent-Driven Development
Execute plan from beads by dispatching fresh subagent per task, with two-stage review after each: spec compliance review first, then code quality review.
Core principle: Fresh subagent per task + two-stage review (spec then quality) = high quality, fast iteration
Storage: Plans tracked in beads epics. No TodoWrite needed - beads provides persistent state.
When to Use
digraph when_to_use {
"Have implementation plan?" [shape=diamond];
"Tasks mostly independent?" [shape=diamond];
"Stay in this session?" [shape=diamond];
"subagent-driven-development" [shape=box];
"executing-plans" [shape=box];
"Manual execution or brainstorm first" [shape=box];
"Have implementation plan?" -> "Tasks mostly independent?" [label="yes"];
"Have implementation plan?" -> "Manual execution or brainstorm first" [label="no"];
"Tasks mostly independent?" -> "Stay in this session?" [label="yes"];
"Tasks mostly independent?" -> "Manual execution or brainstorm first" [label="no - tightly coupled"];
"Stay in this session?" -> "subagent-driven-development" [label="yes"];
"Stay in this session?" -> "executing-plans" [label="no - parallel session"];
}
vs. Executing Plans (parallel session):
- Same session (no context switch)
- Fresh subagent per task (no context pollution)
- Two-stage review after each task: spec compliance first, then code quality
- Faster iteration (no human-in-loop between tasks)
The Process
digraph process {
rankdir=TB;
subgraph cluster_per_task {
label="Per Task";
"Dispatch implementer subagent (./implementer-prompt.md)" [shape=box];
"Implementer subagent asks questions?" [shape=diamond];
"Answer questions, provide context" [shape=box];
"Implementer subagent implements, tests, commits, self-reviews" [shape=box];
"Dispatch spec reviewer subagent (./spec-reviewer-prompt.md)" [shape=box];
"Spec reviewer subagent confirms code matches spec?" [shape=diamond];
"Implementer subagent fixes spec gaps" [shape=box];
"Dispatch code quality reviewer subagent (./code-quality-reviewer-prompt.md)" [shape=box];
"Code quality reviewer subagent approves?" [shape=diamond];
"Implementer subagent fixes quality issues" [shape=box];
"Close task in beads (bd close)" [shape=box];
}
"Load from beads: bd show <epic-id>, bd ready --parent <epic-id>" [shape=box];
"More tasks remain?" [shape=diamond];
"Dispatch final code reviewer subagent for entire implementation" [shape=box];
"Use superpowers:finishing-a-development-branch" [shape=box style=filled fillcolor=lightgreen];
"Load from beads: bd show <epic-id>, bd ready --parent <epic-id>" -> "Dispatch implementer subagent (./implementer-prompt.md)";
"Dispatch implementer subagent (./implementer-prompt.md)" -> "Implementer subagent asks questions?";
"Implementer subagent asks questions?" -> "Answer questions, provide context" [label="yes"];
"Answer questions, provide context" -> "Dispatch implementer subagent (./implementer-prompt.md)";
"Implementer subagent asks questions?" -> "Implementer subagent implements, tests, commits, self-reviews" [label="no"];
"Implementer subagent implements, tests, commits, self-reviews" -> "Dispatch spec reviewer subagent (./spec-reviewer-prompt.md)";
"Dispatch spec reviewer subagent (./spec-reviewer-prompt.md)" -> "Spec reviewer subagent confirms code matches spec?";
"Spec reviewer subagent confirms code matches spec?" -> "Implementer subagent fixes spec gaps" [label="no"];
"Implementer subagent fixes spec gaps" -> "Dispatch spec reviewer subagent (./spec-reviewer-prompt.md)" [label="re-review"];
"Spec reviewer subagent confirms code matches spec?" -> "Dispatch code quality reviewer subagent (./code-quality-reviewer-prompt.md)" [label="yes"];
"Dispatch code quality reviewer subagent (./code-quality-reviewer-prompt.md)" -> "Code quality reviewer subagent approves?";
"Code quality reviewer subagent approves?" -> "Implementer subagent fixes quality issues" [label="no"];
"Implementer subagent fixes quality issues" -> "Dispatch code quality reviewer subagent (./code-quality-reviewer-prompt.md)" [label="re-review"];
"Code quality reviewer subagent approves?" -> "Close task in beads (bd close)" [label="yes"];
"Close task in beads (bd close)" -> "More tasks remain?";
"More tasks remain?" -> "Dispatch implementer subagent (./implementer-prompt.md)" [label="yes"];
"More tasks remain?" -> "Dispatch final code reviewer subagent for entire implementation" [label="no"];
"Dispatch final code reviewer subagent for entire implementation" -> "Use superpowers:finishing-a-development-branch";
}
Prompt Templates
./implementer-prompt.md- Dispatch implementer subagent./spec-reviewer-prompt.md- Dispatch spec compliance reviewer subagent./code-quality-reviewer-prompt.md- Dispatch code quality reviewer subagent
Example Workflow
You: I'm using Subagent-Driven Development to execute this plan.
[Load epic from beads: bd show superpowers-abc123]
[Get ready tasks: bd ready --parent superpowers-abc123]
[Epic has 5 tasks total]
Task 1: Hook installation script (superpowers-abc123.1)
[Get Task 1 details: bd show superpowers-abc123.1]
[Mark in progress: bd update superpowers-abc123.1 --status in_progress]
[Dispatch implementation subagent with full task text + context]
Implementer: "Before I begin - should the hook be installed at user or system level?"
You: "User level (~/.config/superpowers/hooks/)"
Implementer: "Got it. Implementing now..."
[Later] Implementer:
- Implemented install-hook command
- Added tests, 5/5 passing
- Self-review: Found I missed --force flag, added it
- Committed
[Dispatch spec compliance reviewer]
Spec reviewer: ✅ Spec compliant - all requirements met, nothing extra
[Get git SHAs, dispatch code quality reviewer]
Code reviewer: Strengths: Good test coverage, clean. Issues: None. Approved.
[Close Task 1: bd close superpowers-abc123.1]
Task 2: Recovery modes (superpowers-abc123.2)
[Get Task 2 details: bd show superpowers-abc123.2]
[Mark in progress: bd update superpowers-abc123.2 --status in_progress]
[Dispatch implementation subagent with full task text + context]
Implementer: [No questions, proceeds]
Implementer:
- Added verify/repair modes
- 8/8 tests passing
- Self-review: All good
- Committed
[Dispatch spec compliance reviewer]
Spec reviewer: ❌ Issues:
- Missing: Progress reporting (spec says "report every 100 items")
- Extra: Added --json flag (not requested)
[Implementer fixes issues]
Implementer: Removed --json flag, added progress reporting
[Spec reviewer reviews again]
Spec reviewer: ✅ Spec compliant now
[Dispatch code quality reviewer]
Code reviewer: Strengths: Solid. Issues (Important): Magic number (100)
[Implementer fixes]
Implementer: Extracted PROGRESS_INTERVAL constant
[Code reviewer reviews again]
Code reviewer: ✅ Approved
[Close Task 2: bd close superpowers-abc123.2]
...
[After all tasks]
[Check all closed: bd list --parent superpowers-abc123 --status open]
[Empty list - all done]
[Dispatch final code-reviewer]
Final reviewer: All requirements met, ready to merge
[Close epic: bd close superpowers-abc123]
[Sync to git: bd sync]
Done!
Advantages
vs. Manual execution:
- Subagents follow TDD naturally
- Fresh context per task (no confusion)
- Parallel-safe (subagents don't interfere)
- Subagent can ask questions (before AND during work)
vs. Executing Plans:
- Same session (no handoff)
- Continuous progress (no waiting)
- Review checkpoints automatic
Efficiency gains:
- No file reading overhead (controller loads from beads once)
- Controller provides full task text to subagents
- Subagent gets complete information upfront
- Questions surfaced before work begins (not after)
- Beads tracks state persistently (survives session restarts)
Quality gates:
- Self-review catches issues before handoff
- Two-stage review: spec compliance, then code quality
- Review loops ensure fixes actually work
- Spec compliance prevents over/under-building
- Code quality ensures implementation is well-built
Cost:
- More subagent invocations (implementer + 2 reviewers per task)
- Controller does more prep work (extracting all tasks upfront)
- Review loops add iterations
- But catches issues early (cheaper than debugging later)
Beads Integration
This skill loads plans from beads epics and updates task status during execution.
Initial Setup:
# Source helper functions
source skills/lib/beads-helper.sh
# Get epic ID from user or writing-plans output
EPIC_ID="superpowers-abc123"
# View epic and tasks
bd show "$EPIC_ID"
bd ready --parent "$EPIC_ID"
Per Task Workflow:
# Get next ready task
TASK_ID=$(bd ready --parent "$EPIC_ID" --format json | jq -r '.[0].id')
# Get task details
TASK_DESC=$(bd show "$TASK_ID" --json | jq -r '.description')
# Mark in progress
bd update "$TASK_ID" --status in_progress
# [Dispatch implementer subagent with $TASK_DESC]
# [Two-stage review process]
# [Implementer commits work]
# Close task when approved
bd close "$TASK_ID"
# This automatically unblocks dependent tasks
Key Commands:
- Load epic:
bd show <epic-id> - Get ready tasks:
bd ready --parent <epic-id> [--format json] - Get task details:
bd show <task-id> [--json] - Start task:
bd update <task-id> --status in_progress - Complete task:
bd close <task-id> - Check progress:
bd list --parent <epic-id> --status open - Close epic:
bd close <epic-id> - Sync to git:
bd sync
No TodoWrite:
- Beads replaces TodoWrite entirely
- All state persists in
.beads/directory - Synced to git automatically
- Survives session restarts and crashes
- Dependencies tracked automatically
Passing to Subagents:
- Get task description:
bd show <task-id> --json | jq -r '.description' - Pass full description text to implementer subagent
- Include context from epic:
bd show <epic-id> - Subagents don't need beads access - controller manages state
Red Flags
Never:
- Start implementation on main/master branch without explicit user consent
- Skip reviews (spec compliance OR code quality)
- Proceed with unfixed issues
- Dispatch multiple implementation subagents in parallel (conflicts)
- Make subagent read plan file (provide full text instead)
- Skip scene-setting context (subagent needs to understand where task fits)
- Ignore subagent questions (answer before letting them proceed)
- Accept "close enough" on spec compliance (spec reviewer found issues = not done)
- Skip review loops (reviewer found issues = implementer fixes = review again)
- Let implementer self-review replace actual review (both are needed)
- Start code quality review before spec compliance is ✅ (wrong order)
- Move to next task while either review has open issues
If subagent asks questions:
- Answer clearly and completely
- Provide additional context if needed
- Don't rush them into implementation
If reviewer finds issues:
- Implementer (same subagent) fixes them
- Reviewer reviews again
- Repeat until approved
- Don't skip the re-review
If subagent fails task:
- Dispatch fix subagent with specific instructions
- Don't try to fix manually (context pollution)
Integration
Required workflow skills:
- superpowers:using-git-worktrees - REQUIRED: Set up isolated workspace before starting
- superpowers:writing-plans - Creates the plan this skill executes
- superpowers:requesting-code-review - Code review template for reviewer subagents
- superpowers:finishing-a-development-branch - Complete development after all tasks
Subagents should use:
- superpowers:test-driven-development - Subagents follow TDD for each task
Alternative workflow:
- superpowers:executing-plans - Use for parallel session instead of same-session execution
Converted and distributed by TomeVault — claim your Tome and manage your conversions.