Story Creator Skill | Agent Skills

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Story Creator

Purpose

Creates Story documents in Linear from IDEAL plan (CREATE mode) or appends user-requested Stories to existing Epic (ADD mode). Invoked by ln-220-story-coordinator.

Universal factory worker for creating Stories. Supports two modes:

CREATE MODE: Epic has no Stories → create from IDEAL plan (5-10 Stories)
ADD MODE: Epic has Stories → append new Story(s) from user request

Invoked by ln-220-story-coordinator (Phase 5a for CREATE, Phase 5c for ADD).

When Invoked

1. ln-220-story-coordinator CREATE MODE (Phase 5a):

Epic has NO existing Stories (Linear query count = 0)
IDEAL plan generated (Phase 3)
Standards Research completed by ln-001 (Phase 2)
Parameters: epicData, idealPlan, standardsResearch, teamId, autoApprove

2. ln-220-story-coordinator ADD MODE (Phase 5c):

Epic HAS existing Stories, user wants to ADD more (not replan)
Single Story or few Stories from user request
Parameters: epicData, appendMode: true, newStoryDescription, standardsResearch, teamId

Input Parameters

For CREATE MODE (from ln-220-story-coordinator Phase 5a):

{
  epicData: {id, title, description},
  idealPlan: [
    {
      number: "US004",
      title: "Register OAuth client",
      statement: {persona, capability, value},
      ac: [GWT scenarios],
      technicalNotes: {architecture, integrations, performance},
      orchestratorBrief: {tech, keyFiles, approach, complexity},
      estimatedHours: 12,
      testCounts: {e2e: 2, integration: 5, unit: 11}
    }
  ],
  standardsResearch: "OAuth 2.0 (RFC 6749)...",
  teamId: "team-id",
  autoApprove: true
}

For ADD MODE (from ln-220-story-coordinator Phase 5c with appendMode):

{
  epicData: {id, title, description},
  appendMode: true,                    // Signals ADD MODE - append to existing
  newStoryDescription: "User's request for new Story",
  standardsResearch: "Focused research for new Story only",
  teamId: "team-id",
  autoApprove: false                   // User confirmation recommended
}

appendMode: true signals ADD MODE - append to existing Stories
newStoryDescription: User's request for new Story(s) to add
NO idealPlan - creates only what user requested (single Story or few)

Quality Criteria

MANDATORY READ: Load shared/references/creation_quality_checklist.md §Story Creation Checklist for validation criteria that ln-310 will enforce.

Workflow

[!NOTE] ADD MODE (appendMode: true): When adding Stories to existing Epic, workflow is simplified:

Phase 1: Generate only requested Story(s) from newStoryDescription

Skip full IDEAL plan comparison

Standards Research is focused only on new Story topics

Other phases proceed normally (INVEST, Preview, Create)

Phase 1: Generate Story Documents

Load story template (see "Template Loading" section) and use 8 sections.

For EACH Story in IDEAL plan:

| Section | Content | |---------|---------| | 1. Story | As a [persona] / I want [capability] / So that [value] | | 2. Context | Current Situation (from Epic Scope Out) / Desired Outcome (from Epic Success Criteria) | | 3. Acceptance Criteria | Copy AC from idealPlan (3-5 GWT scenarios) | | 4. Implementation Tasks | Placeholder: "Tasks created via ln-300-task-coordinator after ln-310-story-validator" | | 5. Test Strategy | Copy test counts from idealPlan, Risk-Based Testing note | | 6. Technical Notes | INSERT Orchestrator Brief from idealPlan[i].orchestratorBrief (markers ). INSERT Standards Research in Library Research subsection | | 7. Definition of Done | Standard checklist from template | | 8. Dependencies | Empty OR "Depends On: US00X" if ordering implies dependency |

Output: Array of N complete Story documents (5-10) with Standards Research inserted.

Phase 2: Validate INVEST

For EACH Story, check:

| Criterion | Check | Pass | Fail | |-----------|-------|------|------| | Independent | No circular dependencies | ✅ | ❌ STOP | | Negotiable | AC focus on WHAT not HOW | ✅ | ❌ STOP | | Valuable | Clear "So that" value | ✅ | ❌ STOP | | Estimable | Size within checklist #9 range | ✅ | ❌ STOP | | Small | AC/hours/tests per checklist #9 | ✅ | ❌ STOP | | Testable | Measurable AC (GWT format) | ✅ | ❌ STOP |

Error if ANY Story fails → Report to orchestrator, stop execution.

Phase 3: Show Preview

STORY CREATION PREVIEW for Epic 7: OAuth Authentication

Will create 5 Stories:

1. US004: Register OAuth client
   Persona: Third-party developer | Capability: Register app, get credentials
   Value: Can integrate with API | AC: 4 | Estimate: 12h | Tests: 18

2. US005: Request access token
   Persona: API client | Capability: Exchange credentials for token
   Value: Authenticate to API | AC: 5 | Estimate: 18h | Tests: 24

... (3 more)

Total: 5 Stories, 62h, 90 tests

Standards Research: OAuth 2.0 (RFC 6749), RFC 7636 (PKCE), RFC 7009 (Revocation)
Story ordering: Dependency-aware (US004 → US005 → US006)
INVEST validation: ✓

Type "confirm" to create.

Phase 4: User Confirmation

If autoApprove=true: Skip confirmation → Phase 5 Otherwise: Wait for "confirm"

Phase 5: Create in Linear + Update Kanban

Create Linear Issues:

for each Story:
  create_issue({
    title: Story.number + ": " + Story.title,
    description: Story.generated_document,
    project: epicData.id,
    team: teamId,
    labels: ["user-story"],
    state: "Backlog"
  })

Update kanban_board.md:

Epic Grouping Algorithm:

Find ### Backlog
Search **Epic {epicNumber}: {epicTitle}**
- Found: use existing Epic group
- NOT found: create **Epic N: Epic Title**
Add Stories under Epic (2-space indent, 📖 emoji)

Format:

**Epic 7: OAuth Authentication**

  📖 [ID: US004 Register OAuth client](url)
    _(tasks not created yet)_
  📖 [ID: US005 Request access token](url)
    _(tasks not created yet)_

Update Epic Story Counters table:

Last Story: US008
Next Story: US009

Return:

STORIES CREATED for Epic 7: OAuth Authentication

✓ Created 5 Stories in Linear:
  1. [ID: US004 Register OAuth client](url)
  2. [ID: US005 Request access token](url)
  3. [ID: US006 Validate access token](url)
  4. [ID: US007 Refresh expired token](url)
  5. [ID: US008 Revoke token](url)

✓ kanban_board.md updated (Backlog + Epic Story Counters)
✓ Standards Research included: OAuth 2.0, RFC 7636 PKCE, RFC 7009 Revocation

Total: 5 Stories, 62h, 90 tests

NEXT STEPS:
1. Run ln-310-story-validator to validate Stories (Backlog → Todo)
2. Use ln-300-task-coordinator to create tasks

Critical Rules

| Rule | Description | |------|-------------| | Standards Research Insertion | MUST insert in EVERY Story Technical Notes → Library Research (prevents outdated library choices causing rework in ln-400) | | INVEST Validation | All Stories must pass before creation (stop if ANY fails) | | Template Ownership | This skill owns story_template_universal.md in references/ | | Epic Grouping | Reuse Epic header if exists (search by Epic number), don't duplicate | | Story Numbering | Sequential across ALL Epics (read Next Story from kanban_board.md) | | No Code | Descriptions contain approach ONLY, not code |

Definition of Done

✅ Phase 1:

[ ] All N Stories have 8 sections
[ ] Standards Research inserted in Technical Notes → Library Research

✅ Phase 2:

[ ] All Stories pass INVEST validation

✅ Phase 3:

[ ] Preview shown (summaries, totals, Standards Research, ordering)

✅ Phase 4:

[ ] autoApprove=true OR user confirmed

✅ Phase 5:

[ ] All N Stories created in Linear (project=Epic, labels=user-story, state=Backlog)
[ ] kanban_board.md updated (Backlog + Epic Story Counters)
[ ] Summary returned (URLs + next steps)

Template Loading

MANDATORY READ: Load shared/references/template_loading_pattern.md for template copy workflow.

Template: story_template.md Local copy: docs/templates/story_template.md (in target project)

Reference Files

Kanban update algorithm: shared/references/kanban_update_algorithm.md
Template loading: shared/references/template_loading_pattern.md
Linear creation workflow: shared/references/linear_creation_workflow.md

story_template.md

Location: shared/templates/story_template.md (centralized) Local Copy: docs/templates/story_template.md (in target project) Purpose: Universal Story template (8 sections) Template Version: 9.0.0

Integration

Called by: ln-220-story-coordinator

Phase 5a (CREATE MODE, count = 0) - full IDEAL plan
Phase 5c (ADD MODE, count ≥ 1, appendMode) - user-requested Story(s)

Returns:

Success: Story URLs + summary + next steps
Error: "Story USXXX violates INVEST: [details]"

Worker does NOT:

Query Linear for Epic (already in context)
Analyze Epic complexity (orchestrator Phase 3)
Research standards (orchestrator Phase 2 delegates to ln-001)
Build IDEAL plan (receives from orchestrator)

Version: 3.0.0 Last Updated: 2025-12-23

Agent Skills: Story Creator

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