Break a large story or epic into smaller deliverable stories using proven split patterns. Use when backlog items are too big for estimation, sequencing, or independent release.
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SKILL.md
Quellanweisungen · Schreibgeschützte Vorschau
name
user-story-splitting
argument-hint
[story or epic to split]
description
Break a large story or epic into smaller deliverable stories using proven split patterns. Use when backlog items are too big for estimation, sequencing, or independent release.
intent
Break down large user stories, epics, or features into smaller, independently deliverable stories using systematic splitting patterns. Use this to make work more manageable, reduce risk, enable faster feedback cycles, and maintain flow in agile development. This skill applies to user stories, epics, and any work that's too large to complete in a single sprint.
type
component
theme
pm-artifacts
best_for
["Breaking a story that's too big to estimate or finish in a sprint","Applying proven split patterns instead of splitting by component","Keeping each slice independently valuable and releasable"]
scenarios
["This story is too big for a sprint and splitting by frontend/backend isn't working","Our backlog items keep carrying over — I need real split patterns"]
estimated_time
15-25 min
Purpose
Break down large user stories, epics, or features into smaller, independently deliverable stories using systematic splitting patterns. Use this to make work more manageable, reduce risk, enable faster feedback cycles, and maintain flow in agile development. This skill applies to user stories, epics, and any work that's too large to complete in a single sprint.
This is not arbitrary slicing—it's strategic decomposition that preserves user value while reducing complexity.
Input
Works best with: The story or epic that's too big — paste it as written.
Also useful: Why it's too big (can't estimate, can't finish in a sprint, can't release independently) and your team's sizing ceiling.
Anything supplied with the invocation itself — text after the skill name, a pasted context dump, or an appended ARGUMENTS: line — counts as answers already given. Use it and skip whatever it covers; don't re-ask.
Arriving empty-handed? That works too. The skill asks for the story text, then walks the split patterns against it.
Example invocation:Split this: 'As an admin, I can bulk-import users from CSV, Excel, or our HR system with field mapping and error handling.'
Key Concepts
The Story Splitting Framework
Based on Richard Lawrence and Peter Green's "Humanizing Work Guide to Splitting User Stories," the framework provides 8 systematic patterns for splitting work:
Workflow steps: Split along sequential steps in a user's journey
Business rule variations: Split by different rule scenarios (permissions, calculations, etc.)
Data variations: Split by different data types or inputs
Acceptance criteria complexity: Split when multiple "When" or "Then" statements exist
Major effort: Split by technical milestones or implementation phases
External dependencies: Split along dependency boundaries (APIs, third parties, etc.)
DevOps steps: Split by deployment or infrastructure requirements
Tiny Acts of Discovery (TADs): When none of the above apply, use small experiments to unpack unknowns
Reduced risk: Less to build = less that can go wrong
Better estimation: Small stories are easier to estimate accurately
Maintain flow: Keeps work moving through the sprint without bottlenecks
Testability: Smaller scope = easier to write and run tests
Anti-Patterns (What This Is NOT)
Not horizontal slicing: Don't split into "front-end story" and "back-end story" (each story should deliver user value)
Not task decomposition: Stories aren't tasks ("Set up database," "Write API")
Not arbitrary chopping: Don't split "Add user management" into "Add user" and "Management" (meaningless)
When to Use This
Story is too large for a single sprint
Multiple "When" or "Then" statements in acceptance criteria
Epic needs to be broken down into deliverable increments
Team can't reach consensus on story size or scope
Story has multiple personas or workflows bundled together
When NOT to Use This
Story is already small and well-scoped (don't over-split)
Splitting would create dependencies that slow delivery
The story is a technical task (use engineering task breakdown instead)
Application
Step 1: Identify the Original Story
Start with the story/epic/feature that needs splitting. Ensure it's written using the user story format (reference skills/user-story/SKILL.md or skills/epic-hypothesis/SKILL.md).
### Original Story:
[Story formatted with use case and acceptance criteria]
Step 2: Apply the Splitting Logic
Use template.md for the full fill-in structure and output format.
Work through the 8 splitting patterns in order. Stop when you find one that applies.
Pattern 1: Workflow Steps
Ask: Does this story contain multiple sequential steps?
Example:
Original: "As a user, I want to sign up, verify my email, and complete onboarding"
Split:
"As a user, I want to sign up with email/password"
"As a user, I want to verify my email via a confirmation link"
"As a user, I want to complete onboarding by answering 3 profile questions"
Pattern 2: Business Rule Variations
Ask: Does this story have different rules for different scenarios?
Example:
Original: "As a user, I want to apply discounts (10% for members, 20% for VIPs, 5% for first-time buyers)"
Split:
"As a member, I want to apply a 10% discount at checkout"
"As a VIP, I want to apply a 20% discount at checkout"
"As a first-time buyer, I want to apply a 5% discount at checkout"
Pattern 3: Data Variations
Ask: Does this story handle different types of data or inputs?
Example:
Original: "As a user, I want to upload files (images, PDFs, videos)"
Split:
"As a user, I want to upload image files (JPG, PNG)"
"As a user, I want to upload PDF documents"
"As a user, I want to upload video files (MP4, MOV)"
Pattern 4: Acceptance Criteria Complexity
Ask: Does this story have multiple "When" or "Then" statements?
Example:
Original: "As a user, I want to manage my cart"
When I add an item, Then it appears in my cart
When I remove an item, Then it disappears from my cart
When I update quantity, Then the cart total updates
Split:
"As a user, I want to add items to my cart so I can purchase them later"
"As a user, I want to remove items from my cart so I can change my mind"
"As a user, I want to update item quantities so I can buy the right amount"
Note: This is the most common indicator that a story needs splitting. If you see multiple "When/Then" pairs, split along those boundaries.
Pattern 5: Major Effort
Ask: Does this story require significant technical work that can be delivered incrementally?
Example:
Original: "As a user, I want real-time collaboration on documents"
Split:
"As a user, I want to see who else is viewing the document (read-only presence)"
"As a user, I want to see live cursor positions of other editors"
"As a user, I want to see live edits from other users in real-time"
Pattern 6: External Dependencies
Ask: Does this story depend on multiple external systems or APIs?
Example:
Original: "As a user, I want to log in with Google, Facebook, or Twitter"
Split:
"As a user, I want to log in with Google OAuth"
"As a user, I want to log in with Facebook OAuth"
"As a user, I want to log in with Twitter OAuth"
Pattern 7: DevOps Steps
Ask: Does this story require complex deployment, infrastructure, or operational work?
Example:
Original: "As a user, I want to upload large files to cloud storage"
Split:
"As a user, I want to upload small files (<10MB) to cloud storage"
"As a user, I want to upload large files (10MB-1GB) with progress tracking"
"As a user, I want to resume interrupted uploads"
Pattern 8: Tiny Acts of Discovery (TADs)
Ask: If none of the above apply, are there unknowns or assumptions that need unpacking?
Example:
Original: "As a user, I want AI-powered recommendations" (too vague, too many unknowns)
TADs:
Prototype 3 recommendation algorithms and test with 10 users
Define success criteria (click-through rate, user satisfaction)
Build the simplest recommendation engine (collaborative filtering)
Measure and iterate
Note: TADs aren't stories—they're experiments. Use them to de-risk and clarify before writing stories.
Step 3: Write the Split Stories
For each split, write a complete user story using the format from skills/user-story/SKILL.md:
Does each split deliver user value? (Not just "front-end done")
Can each split be developed independently? (No hard dependencies)
Can each split be tested independently? (Clear acceptance criteria)
Is each split small enough for a sprint? (1-5 days of work)
Do the splits, when combined, equal the original? (Nothing lost in translation)
If any answer is "no," revise.
Examples
See examples/sample.md for full splitting examples.
Mini example excerpt:
### Original Story:
As a team admin, I want to manage team members so that I can control access.
### Suggested Splits (Acceptance Criteria Complexity):1. Invite new team members
2. Remove team members
3. Update team member roles
Common Pitfalls
Pitfall 1: Horizontal Slicing (Technical Layers)
Symptom: "Story 1: Build the API. Story 2: Build the UI."
Consequence: Neither story delivers user value independently.
Fix: Split vertically—each story should include front-end + back-end work to deliver a complete user-facing capability.
Pitfall 2: Over-Splitting
Symptom: "Story 1: Add button. Story 2: Wire button to API. Story 3: Display result."
Consequence: Creates unnecessary overhead and dependencies.
Fix: Only split when the story is too large. A 2-day story doesn't need splitting.
Pitfall 3: Meaningless Splits
Symptom: "Story 1: First half of feature. Story 2: Second half of feature."
Consequence: Arbitrary splits that don't map to user value or workflow.
Fix: Use one of the 8 splitting patterns—each split should have a clear rationale.
Pitfall 4: Creating Hard Dependencies
Symptom: "Story 2 can't start until Story 1 is 100% done, tested, and deployed."
Consequence: No parallelization, slows delivery.
Fix: Split in a way that allows independent development. If dependencies are unavoidable, prioritize Story 1.
Pitfall 5: Ignoring the "So That"
Symptom: Split stories have the same "so that" statement.
Consequence: You've split the action but not the outcome—likely a task decomposition, not a story split.
Fix: Ensure each split has a distinct user outcome. If not, reconsider the split pattern.
References
Related Skills
skills/user-story/SKILL.md — Format for writing the split stories
skills/epic-hypothesis/SKILL.md — Epics often need splitting before becoming stories
skills/jobs-to-be-done/SKILL.md — Helps identify meaningful splits along user jobs
External Frameworks
Richard Lawrence & Peter Green, The Humanizing Work Guide to Splitting User Stories — Origin of the 8 splitting patterns
Bill Wake, INVEST in Good Stories (2003) — Criteria for well-formed stories (Independent, Negotiable, Valuable, Estimable, Small, Testable)
Mike Cohn, User Stories Applied (2004) — Story decomposition techniques
Dean's Work
User Story Splitting Prompt Template (based on Humanizing Work framework)
Provenance
Adapted from prompts/user-story-splitting-prompt-template.md in the https://github.com/deanpeters/product-manager-prompts repo.
Skill type: Component
Suggested filename:user-story-splitting.mdSuggested placement:/skills/components/Dependencies: References skills/user-story/SKILL.md, skills/epic-hypothesis/SKILL.mdApplies to: User stories, epics, and any work that's too large to complete in a single sprint
