Stories & Tasks Breakdown
Decomposing architecture blueprints into discrete, dependency-mapped user stories and actionable task units for parallel AI execution agents.
19 August 2026
The Gap Without Structured Decomposition
Once a system architecture plan is locked in plan.md, the common mistake is to hand that entire multi-page document to an AI coding agent and say: "Build this."
Without decomposing architecture into isolated, dependency-ordered work units, three severe failure modes occur in agentic workflows:
- Context Saturation & Hallucination. A full architecture plan contains API routes, database schemas, frontend components, and security policies. Handing everything to a single prompt exceeds effective working memory, causing agents to skip edge cases or invent shortcuts.
- Merge Conflicts & Collision in Parallel Work. When multiple agents run concurrently without strict file ownership boundaries, they edit the same files, overwrite shared types, and create unresolvable git merge conflicts.
- Loss of Incremental Verification. If a monolithic task fails halfway through, it is nearly impossible to determine which sub-components work and which are broken. Progress becomes all-or-nothing.
To enable fast, parallel, and reliable code generation, we must bridge the gap between high-level architecture and low-level code through deterministic story and task decomposition.
Never dispatch an execution agent on an architecture plan directly. Decompose the plan into bite-sized task units with explicit file boundaries, single responsibilities, and machine-verifiable acceptance criteria.
The Skill: /sprint-stories-tasks
In the sprint-workflow operating system, after the architecture plan is approved, we trigger the planning breakdown phase:
/sprint-stories-tasks <N>
Where <N> is the sprint iteration or slug (e.g., /sprint-stories-tasks 05 or /sprint-stories-tasks invoice-service).
Executing /sprint-stories-tasks automates a multi-step preflight and decomposition sequence:
- Preflight Validation: Checks that
brainstorm.mdandplan.mdare present, fully specified, and approved. Verifies that the git branch and manifest state are aligned. - User Story Formulation: Slices the architecture into independent user-facing capabilities or subsystem increments (
story-01.md,story-02.md). - Task Unit Atomic Breakdown: Deconstructs each story into granular tasks (
task-01-schema.md,task-02-api.md,task-03-ui.md), each constrained to specific file paths and explicit input/output contracts. - Dependency Graph & Execution Matrix: Establishes execution prerequisites (e.g., backend schema must complete before frontend API client mocking) and prepares the sprint for parallel agent dispatch.
- Manifest State Transition: Writes all generated stories and tasks into
.sprint/<slug>/tasks/and updatessprint-manifest.jsonto ready status.
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