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Oleksandr Bezdieniezhnykh
2026-05-05 01:08:45 +03:00
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name: decompose
description: |
Decompose planned components into atomic implementable tasks with bootstrap structure plan.
4-step workflow: bootstrap structure plan, component task decomposition, blackbox test task decomposition, and cross-task verification.
Supports full decomposition (_docs/ structure), single component mode, and tests-only mode.
Workflow entrypoints: implementation task decomposition, single component decomposition, and tests-only decomposition.
The invoking flow decides which entrypoint to run; this skill executes that selected sequence.
Trigger phrases:
- "decompose", "decompose features", "feature decomposition"
- "task decomposition", "break down components"
@@ -20,7 +20,7 @@ Decompose planned components into atomic, implementable task specs with a bootst
## Core Principles
- **Atomic tasks**: each task does one thing; if it exceeds 8 complexity points, split it
- **Atomic tasks**: each task does one thing; if it exceeds 5 complexity points, split it
- **Behavioral specs, not implementation plans**: describe what the system should do, not how to build it
- **Flat structure**: all tasks are tracker-ID-prefixed files in TASKS_DIR — no component subdirectories
- **Save immediately**: write artifacts to disk after each task; never accumulate unsaved work
@@ -30,14 +30,15 @@ Decompose planned components into atomic, implementable task specs with a bootst
## Context Resolution
Determine the operating mode based on invocation before any other logic runs.
Resolve the selected entrypoint from the invocation context before any other logic runs. The caller decides whether this is implementation, single component, or tests-only decomposition; this skill only executes the selected sequence.
**Default** (no explicit input file provided):
**Implementation task decomposition** (default; selected by flows before invoking this skill):
- DOCUMENT_DIR: `_docs/02_document/`
- TASKS_DIR: `_docs/02_tasks/`
- TASKS_TODO: `_docs/02_tasks/todo/`
- Reads from: `_docs/00_problem/`, `_docs/01_solution/`, DOCUMENT_DIR
- Produces only implementation tasks. Blackbox/e2e test task files are produced only when the invoking flow selects tests-only decomposition.
**Single component mode** (provided file is within `_docs/02_document/` and inside a `components/` subdirectory):
@@ -55,24 +56,24 @@ Determine the operating mode based on invocation before any other logic runs.
- TESTS_DIR: `DOCUMENT_DIR/tests/`
- Reads from: `_docs/00_problem/`, `_docs/01_solution/`, TESTS_DIR
Announce the detected mode and resolved paths to the user before proceeding.
Announce the selected entrypoint and resolved paths to the user before proceeding.
### Step Applicability by Mode
| Step | File | Default | Single | Tests-only |
|------|------|:-------:|:------:|:----------:|
| Step | File | Implementation | Single | Tests-only |
|------|------|:--------------:|:------:|:----------:|
| 1 Bootstrap Structure | `steps/01_bootstrap-structure.md` | ✓ | — | — |
| 1t Test Infrastructure | `steps/01t_test-infrastructure.md` | — | — | ✓ |
| 1.5 Module Layout | `steps/01-5_module-layout.md` | ✓ | — | — |
| 2 Task Decomposition | `steps/02_task-decomposition.md` | ✓ | ✓ | — |
| 3 Blackbox Test Tasks | `steps/03_blackbox-test-decomposition.md` | | — | ✓ |
| 3 Blackbox Test Tasks | `steps/03_blackbox-test-decomposition.md` | | — | ✓ |
| 4 Cross-Verification | `steps/04_cross-verification.md` | ✓ | — | ✓ |
## Input Specification
### Required Files
**Default:**
**Implementation task decomposition:**
| File | Purpose |
|------|---------|
@@ -84,7 +85,7 @@ Announce the detected mode and resolved paths to the user before proceeding.
| `DOCUMENT_DIR/glossary.md` | Project terminology (confirmed by user in plan Phase 2a.0 or document Step 4.5). Use it to keep task names, component references, and AC wording consistent with the user's vocabulary |
| `DOCUMENT_DIR/system-flows.md` | System flows from plan skill |
| `DOCUMENT_DIR/components/[##]_[name]/description.md` | Component specs from plan skill |
| `DOCUMENT_DIR/tests/` | Blackbox test specs from plan skill |
| `DOCUMENT_DIR/tests/` | Optional product acceptance context from test-spec skill; do not create test task files from it in this entrypoint |
**Single component mode:**
@@ -111,7 +112,7 @@ Announce the detected mode and resolved paths to the user before proceeding.
### Prerequisite Checks (BLOCKING)
**Default:**
**Implementation task decomposition:**
1. DOCUMENT_DIR contains `architecture.md` and `components/`**STOP if missing**
2. Create TASKS_DIR and TASKS_TODO if they do not exist
@@ -145,6 +146,8 @@ TASKS_DIR/
**Naming convention**: Each task file is initially saved in `TASKS_TODO/` with a temporary numeric prefix (`[##]_[short_name].md`). After creating the work item ticket, rename the file to use the work item ticket ID as prefix (`[TRACKER-ID]_[short_name].md`). For example: `todo/01_initial_structure.md``todo/AZ-42_initial_structure.md`.
If tracker availability fails, follow `.cursor/rules/tracker.mdc` before continuing. Only when the user explicitly chooses `tracker: local` may the numeric prefix remain; in that mode set `Tracker: pending` and `Epic: pending` in the task header and keep the task eligible for later tracker sync.
### Save Timing
| Step | Save immediately after | Filename |
@@ -166,11 +169,11 @@ If TASKS_DIR subfolders already contain task files:
## Progress Tracking
At the start of execution, create a TodoWrite with all applicable steps for the detected mode (see Step Applicability table). Update status as each step/component completes.
At the start of execution, create a TodoWrite with all applicable steps for the selected entrypoint (see Step Applicability table). Update status as each step/component completes.
## Workflow
### Step 1: Bootstrap Structure Plan (default mode only)
### Step 1: Bootstrap Structure Plan (implementation mode only)
Read and follow `steps/01_bootstrap-structure.md`.
@@ -182,25 +185,25 @@ Read and follow `steps/01t_test-infrastructure.md`.
---
### Step 1.5: Module Layout (default mode only)
### Step 1.5: Module Layout (implementation mode only)
Read and follow `steps/01-5_module-layout.md`.
---
### Step 2: Task Decomposition (default and single component modes)
### Step 2: Task Decomposition (implementation and single component modes)
Read and follow `steps/02_task-decomposition.md`.
---
### Step 3: Blackbox Test Task Decomposition (default and tests-only modes)
### Step 3: Blackbox Test Task Decomposition (tests-only mode only)
Read and follow `steps/03_blackbox-test-decomposition.md`.
---
### Step 4: Cross-Task Verification (default and tests-only modes)
### Step 4: Cross-Task Verification (implementation and tests-only modes)
Read and follow `steps/04_cross-verification.md`.
@@ -208,7 +211,7 @@ Read and follow `steps/04_cross-verification.md`.
- **Coding during decomposition**: this workflow produces specs, never code
- **Over-splitting**: don't create many tasks if the component is simple — 1 task is fine
- **Tasks exceeding 8 points**: split them; no task should be too complex for a single implementer
- **Tasks exceeding 5 points**: split them; no task should be too complex for a single implementer
- **Cross-component tasks**: each task belongs to exactly one component
- **Skipping BLOCKING gates**: never proceed past a BLOCKING marker without user confirmation
- **Creating git branches**: branch creation is an implementation concern, not a decomposition one
@@ -221,7 +224,7 @@ Read and follow `steps/04_cross-verification.md`.
| Situation | Action |
|-----------|--------|
| Ambiguous component boundaries | ASK user |
| Task complexity exceeds 8 points after splitting | ASK user |
| Task complexity exceeds 5 points after splitting | ASK user |
| Missing component specs in DOCUMENT_DIR | ASK user |
| Cross-component dependency conflict | ASK user |
| Tracker epic not found for a component | ASK user for Epic ID |
@@ -233,15 +236,14 @@ Read and follow `steps/04_cross-verification.md`.
┌────────────────────────────────────────────────────────────────┐
│ Task Decomposition (Multi-Mode) │
├────────────────────────────────────────────────────────────────┤
│ CONTEXT: Resolve mode (default / single component / tests-only) │
│ CONTEXT: Invoke the selected entrypoint (implementation / single / tests-only) │
│ │
DEFAULT MODE:
IMPLEMENTATION TASK DECOMPOSITION:
│ 1. Bootstrap Structure → steps/01_bootstrap-structure.md │
│ [BLOCKING: user confirms structure] │
│ 1.5 Module Layout → steps/01-5_module-layout.md │
│ [BLOCKING: user confirms layout] │
│ 2. Component Tasks → steps/02_task-decomposition.md │
│ 3. Blackbox Tests → steps/03_blackbox-test-decomposition.md │
│ 4. Cross-Verification → steps/04_cross-verification.md │
│ [BLOCKING: user confirms dependencies] │
│ │
@@ -26,7 +26,7 @@ For each component (or the single provided component):
4. Do not create tasks for other components — only tasks for the current component
5. Each task should be atomic, containing 1 API or a list of semantically connected APIs
6. Write each task spec using `templates/task.md`
7. Estimate complexity per task (1, 2, 3, 5, 8 points); no task should exceed 8 points — split if it does
7. Estimate complexity per task (1, 2, 3, 5 points); no task should exceed 5 points — split if it does
8. Note task dependencies (referencing tracker IDs of already-created dependency tasks, e.g., `AZ-42_initial_structure`)
9. **Cross-cutting rule**: if a concern spans ≥2 components (logging, config loading, auth/authZ, error envelope, telemetry, feature flags, i18n), create ONE shared task under the cross-cutting epic. Per-component tasks declare it as a dependency and consume it; they MUST NOT re-implement it locally. Duplicate local implementations are an `Architecture` finding (High) in code-review Phase 7 and a `Maintainability` finding in Phase 6.
10. **Shared-models / shared-API rule**: classify the task as shared if ANY of the following is true:
@@ -46,7 +46,7 @@ For each component (or the single provided component):
## Self-verification (per component)
- [ ] Every task is atomic (single concern)
- [ ] No task exceeds 8 complexity points
- [ ] No task exceeds 5 complexity points
- [ ] Task dependencies reference correct tracker IDs
- [ ] Tasks cover all interfaces defined in the component spec
- [ ] No tasks duplicate work from other components
@@ -1,4 +1,4 @@
# Step 3: Blackbox Test Task Decomposition (default and tests-only modes)
# Step 3: Blackbox Test Task Decomposition (tests-only mode only)
**Role**: Professional Quality Assurance Engineer
**Goal**: Decompose blackbox test specs into atomic, implementable task specs.
@@ -6,7 +6,6 @@
## Numbering
- In default mode: continue sequential numbering from where Step 2 left off.
- In tests-only mode: start from 02 (01 is the test infrastructure bootstrap from Step 1t).
## Steps
@@ -15,10 +14,9 @@
2. Group related test scenarios into atomic tasks (e.g., one task per test category or per component under test)
3. Each task should reference the specific test scenarios it implements and the environment/test-data specs
4. Dependencies:
- In default mode: blackbox test tasks depend on the component implementation tasks they exercise
- In tests-only mode: blackbox test tasks depend on the test infrastructure bootstrap task (Step 1t)
5. Write each task spec using `templates/task.md`
6. Estimate complexity per task (1, 2, 3, 5, 8 points); no task should exceed 8 points — split if it does
6. Estimate complexity per task (1, 2, 3, 5 points); no task should exceed 5 points — split if it does
7. Note task dependencies (referencing tracker IDs of already-created dependency tasks)
8. **Immediately after writing each task file**: create a work item ticket under the "Blackbox Tests" epic, write the work item ticket ID and Epic ID back into the task header, then rename the file from `todo/[##]_[short_name].md` to `todo/[TRACKER-ID]_[short_name].md`.
@@ -26,8 +24,8 @@
- [ ] Every scenario from `tests/blackbox-tests.md` is covered by a task
- [ ] Every scenario from `tests/performance-tests.md`, `tests/resilience-tests.md`, `tests/security-tests.md`, and `tests/resource-limit-tests.md` is covered by a task
- [ ] No task exceeds 8 complexity points
- [ ] Dependencies correctly reference the dependency tasks (component tasks in default mode, test infrastructure in tests-only mode)
- [ ] No task exceeds 5 complexity points
- [ ] Dependencies correctly reference the test infrastructure task
- [ ] Every task has a work item ticket linked to the "Blackbox Tests" epic
## Save action
@@ -1,4 +1,4 @@
# Step 4: Cross-Task Verification (default and tests-only modes)
# Step 4: Cross-Task Verification (implementation and tests-only modes)
**Role**: Professional software architect and analyst
**Goal**: Verify task consistency and produce `_dependencies_table.md`.
@@ -8,7 +8,7 @@
1. Verify task dependencies across all tasks are consistent
2. Check no gaps:
- In default mode: every interface in `architecture.md` has tasks covering it
- In implementation mode: every product interface in `architecture.md` has implementation task coverage
- In tests-only mode: every test scenario in `traceability-matrix.md` is covered by a task
3. Check no overlaps: tasks don't duplicate work
4. Check no circular dependencies in the task graph
@@ -16,9 +16,9 @@
## Self-verification
### Default mode
### Implementation mode
- [ ] Every architecture interface is covered by at least one task
- [ ] Every product interface in `architecture.md` is covered by at least one implementation task
- [ ] No circular dependencies in the task graph
- [ ] Cross-component dependencies are explicitly noted in affected task specs
- [ ] `_dependencies_table.md` contains every task with correct dependencies
@@ -28,4 +28,4 @@ Use this template after cross-task verification. Save as `TASKS_DIR/_dependencie
- Dependencies column lists tracker IDs (e.g., "AZ-43, AZ-44") or "None"
- No circular dependencies allowed
- Tasks should be listed in recommended execution order
- The `/implement` skill reads this table to compute parallel batches
- The `/implement` skill reads this table to compute dependency-aware batches; task execution remains sequential
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@@ -11,7 +11,7 @@ Save as `TASKS_DIR/[##]_[short_name].md` initially, then rename to `TASKS_DIR/[T
**Task**: [TRACKER-ID]_[short_name]
**Name**: [short human name]
**Description**: [one-line description of what this task delivers]
**Complexity**: [1|2|3|5|8] points
**Complexity**: [1|2|3|5] points
**Dependencies**: [AZ-43_shared_models, AZ-44_db_migrations] or "None"
**Component**: [component name for context]
**Tracker**: [TASK-ID]
@@ -102,8 +102,7 @@ Consumers MUST read that file — not this task spec — to discover the interfa
- 2 points: Non-trivial, low complexity, minimal coordination
- 3 points: Multi-step, moderate complexity, potential alignment needed
- 5 points: Difficult, interconnected logic, medium-high risk
- 8 points: High difficulty, high ambiguity or coordination, multiple components
- 13 points: Too complex — split into smaller tasks
- 8+ points: Too complex — split into smaller tasks
## Output Guidelines