Atomic Tasks Skill

This skill provides patterns for creating well-structured, atomic tasks that follow the principle: One task = One commit = One thing.

Core Principles

Atomicity

Each task should be:

• Self-contained: Completes a single logical unit of work
• Independently verifiable: Can be tested/verified in isolation
• Safely committable: Results in a working codebase if committed alone
• Rollback-friendly: Can be reverted without breaking other tasks

Task Properties

Task Sizing Guidelines

Too Large (Split It)

• Touches more than 5 files
• Has more than 5 actions
• Takes more than 30 minutes
• Multiple logical concerns mixed together
• Commit message needs “and” multiple times

Too Small (Combine It)

• Only renames a variable
• Single-line change with no logic
• Cannot be meaningfully verified
• Would create noise in git history

Just Right

• 1-3 files modified typically
• 2-5 clear actions
• Single responsibility
• Clear verification steps
• Concise commit message

Task Status Flow

pending ─── in_progress ─── completed
    │            │
    │            └── blocked (external dependency)
    │
    └── skipped (no longer needed)

Dependency Management

Dependency Types

1. Code Dependency: Task B needs code from Task A
2. Schema Dependency: Task B needs database changes from Task A
3. Config Dependency: Task B needs configuration from Task A
4. Knowledge Dependency: Task B needs information gathered in Task A

Dependency Rules

• No circular dependencies allowed
• Minimize dependency chains (prefer parallelizable tasks)
• Document why dependency exists
• Re-evaluate if blocked task is taking too long

Verification Patterns

Automated Verification

<verify>
  <step>npm test -- [test-pattern]</step>
  <step>npm run build</step>
  <step>npm run lint -- [file]</step>
</verify>

Manual Verification

<verify>
  <step>Visually confirm [UI element] appears</step>
  <step>Manual test: [test scenario]</step>
</verify>

Combined Verification

<verify>
  <step>npm test -- auth</step>
  <step>Manual: Login with test credentials</step>
  <step>Check logs for errors</step>
</verify>

Done Criteria Patterns

Feature Tasks

<done>
  <criterion>Feature is accessible via [entry point]</criterion>
  <criterion>Tests cover happy path and error cases</criterion>
  <criterion>No new lint warnings introduced</criterion>
</done>

Bug Fix Tasks

<done>
  <criterion>Original issue no longer reproduces</criterion>
  <criterion>Regression test added</criterion>
  <criterion>Related functionality still works</criterion>
</done>

Refactor Tasks

<done>
  <criterion>All existing tests still pass</criterion>
  <criterion>No functional changes detected</criterion>
  <criterion>[Quality metric] improved</criterion>
</done>

Commit Message Convention

Follow Conventional Commits:

<type>(<scope>): <description>

[optional body]

[optional footer]

Types

Examples

feat(auth): add login endpoint
fix(cart): prevent negative quantities
refactor(api): extract validation middleware
test(user): add registration edge cases

Task Decomposition Process

1. Start with the goal: What is the end result?
2. Identify major components: What distinct pieces are needed?
3. Check for dependencies: What order must they happen in?
4. Size each component: Is each one atomic?
5. Split if needed: Break large components down
6. Define verification: How will we know each is done?
7. Write commit messages: Force clarity of purpose

Anti-Patterns to Avoid

The Kitchen Sink

<!-- BAD: Too many unrelated changes -->
<task id="TASK-001">
  <name>Add auth and update styling and fix bugs</name>
  ...
</task>

The Invisible Task

<!-- BAD: No way to verify -->
<task id="TASK-001">
  <name>Improve code quality</name>
  <verify></verify>
</task>

The Dependency Chain

<!-- BAD: Long sequential chain -->
TASK-001 → TASK-002 → TASK-003 → TASK-004 → TASK-005

The Vague Action

<!-- BAD: Not actionable -->
<actions>
  <action>Make it better</action>
  <action>Fix the thing</action>
</actions>

Integration with Workflow

PLAN Phase

• Create all tasks using XML format
• Verify cross-plan consistency
• Establish execution order

EXECUTE Phase

• Process one task at a time
• Mark status transitions
• Run verification after each
• Commit on success

VERIFY Phase

• Review all completed tasks
• Run integration verification
• Confirm done criteria met

See xml-format.md for complete XML schema reference.