Create Stories

Port provenance: adapted from the pinned upstream source at 984023ddac0d5e27624f2baacde6105e45de375f under MIT; see the repository parity ledger for the exact path and blob.

Create Stories

A story is a single implementable behaviour — small enough to complete in one focused session, self-contained, and fully traceable to a GDD requirement and an ADR decision. Stories are what developers pick up. Epics are what architects define.

Run this skill per epic, not per layer. Run it for Foundation epics first, then Core, and so on — matching the dependency order.

Output: production/epics/[epic-slug]/story-NNN-[slug].md files

Previous step: $ai-game-studio:create-epics [system] Next step after stories exist: $ai-game-studio:story-readiness [story-path] then $ai-game-studio:dev-story [story-path]

1. Parse Argument

Extract --review [full|lean|solo] if present and store as the review mode override for this run. If not provided, read production/review-mode.txt (default lean if missing). This resolved mode applies to all gate spawns in this skill — apply the check pattern from the installed Codex role-gate protocol before every gate invocation.

• $ai-game-studio:create-stories [epic-slug] — e.g. $ai-game-studio:create-stories combat
• $ai-game-studio:create-stories production/epics/combat/EPIC.md — full path also accepted
• No argument — ask: "Which epic would you like to break into stories?" file discovery production/epics/*/EPIC.md and list available epics with their status.

2. Load Everything for This Epic

Read in full:

• production/epics/[epic-slug]/EPIC.md — epic overview, governing ADRs, GDD requirements table
• The epic's GDD (design/gdd/[filename].md) — read all 8 sections, especially Acceptance Criteria, Formulas, and Edge Cases
• All governing ADRs listed in the epic — read the Decision, Implementation Guidelines, Engine Compatibility, and Engine Notes sections
• docs/architecture/control-manifest.md — extract rules for this epic's layer; note the Manifest Version date from the header
• docs/architecture/tr-registry.yaml — load all TR-IDs for this system

ADR existence validation: After reading the governing ADRs list from the epic, confirm each ADR file exists on disk. If any ADR file cannot be found, stop immediately before decomposing any story:

"Epic references [ADR-NNNN: title] but docs/architecture/[adr-file].md was not found. Check the filename in the epic's Governing ADRs list, or run $ai-game-studio:architecture-decision to create it. Cannot create stories until all referenced ADR files are present."

Do not proceed to Step 3 until all referenced ADR files are confirmed present.

Report: "Loaded epic [name], GDD [filename], [N] governing ADRs (all confirmed present), control manifest v[date]."

3. Classify Stories by Type

Story Type Classification — assign each story a type based on its acceptance criteria:

Mixed stories: assign the type that carries the highest implementation risk. The type determines what test evidence is required before $ai-game-studio:story-done can close the story.

4. Decompose the GDD into Stories

For each GDD acceptance criterion:

1. Group related criteria that require the same core implementation
2. Each group = one story
3. Order stories: foundational behaviour first, edge cases last, UI last

Story sizing rule: one story = one focused session (~2-4 hours). If a group of criteria would take longer, split into two stories.

For each story, determine:

• GDD requirement: which acceptance criterion(ia) does this satisfy?
• TR-ID: look up in tr-registry.yaml. Use the stable ID. If no match, use TR-[system]-??? and warn.
• Governing ADR: which ADR governs how to implement this?
  • Status: Accepted → embed normally
  • Status: Proposed → set story Status: Blocked with note: "BLOCKED: ADR-NNNN is Proposed — run $ai-game-studio:architecture-decision to advance it"
  • Multiple ADRs apply: List all governing ADRs in the story's Governing ADRs: field. Designate the one most directly controlling the implementation pattern as primary (first in the list). Others are listed as secondary references.
  • No ADR applies at all: Write ADR: N/A — [brief reason, e.g. "pure data configuration, no architectural pattern required"] in the story's ADR field. Do NOT leave the field blank — a blank ADR field means "not checked", not "not applicable".
• Story Type: from Step 3 classification
• Engine risk: from the ADR's Knowledge Risk field

4b. QA Lead Story Readiness Gate

Review mode check — apply before spawning QL-STORY-READY:

• solo → skip. Note: "QL-STORY-READY skipped — Solo mode." Proceed to Step 5 (present stories for review).
• lean → skip (not a PHASE-GATE). Note: "QL-STORY-READY skipped — Lean mode." Proceed to Step 5 (present stories for review).
• full → spawn as normal.

After decomposing all stories (Step 4 complete) but before presenting them for write approval, spawn qa-lead with a Codex subagent using gate QL-STORY-READY (the installed Codex role-gate protocol).

Pass: the full story list with acceptance criteria, story types, and TR-IDs; the epic's GDD acceptance criteria for reference.

Present the QA lead's assessment. For each story flagged as GAPS or INADEQUATE, revise the acceptance criteria before proceeding — stories with untestable criteria cannot be implemented correctly. Once all stories reach ADEQUATE, proceed.

Before generating test specs: file discovery production/qa/qa-plan-*.md for the most recently modified file. If found, read it and check whether it contains test case specifications for the stories in this epic (look for story titles or slugs in the plan's Automated Tests Required section). If matching specs exist:

• Use the available user-input mechanism:
  • Prompt: "A QA plan exists at [path] with test specs for some of these stories. How do you want to proceed?"
  • Options:
    • Use existing specs from the QA plan — embed them into the story files (Recommended)
    • Ask qa-lead to generate fresh specs — override the QA plan
    • Skip test spec generation — I'll fill in ## QA Test Cases manually
• If "Use existing specs": extract the test case specs from the qa-plan for each matching story and embed them directly into the ## QA Test Cases section. No qa-lead spawn needed for those stories. Only spawn qa-lead for stories with no coverage in the qa-plan.
• If "Generate fresh": proceed with the qa-lead spawn below as normal.
• If "Skip": leave ## QA Test Cases with a placeholder: *Test cases not yet defined — run $ai-game-studio:qa-plan to generate them.*

After ADEQUATE (or after qa-plan import): for every Logic and Integration story, ask the qa-lead to produce concrete test case specifications — one per acceptance criterion — in this format:

Test: [criterion text]
  Given: [precondition]
  When: [action]
  Then: [expected result / assertion]
  Edge cases: [boundary values or failure states to test]

For Visual/Feel and UI stories, produce manual verification steps instead:

Manual check: [criterion text]
  Setup: [how to reach the state]
  Verify: [what to look for]
  Pass condition: [unambiguous pass description]

These test case specs are embedded directly into each story's ## QA Test Cases section. The developer implements against these cases. The programmer does not write tests from scratch — QA has already defined what "done" looks like.

5. Present Stories for Review

Before writing any files, present the full story list:

## Stories for Epic: [name]

Story 001: [title] — Logic — ADR-NNNN
  Covers: TR-[system]-001 ([1-line summary of requirement])
  Test required: tests/unit/[system]/[slug]_test.[ext]

Story 002: [title] — Integration — ADR-MMMM
  Covers: TR-[system]-002, TR-[system]-003
  Test required: tests/integration/[system]/[slug]_test.[ext]

Story 003: [title] — Visual/Feel — ADR-NNNN
  Covers: TR-[system]-004
  Evidence required: production/qa/evidence/[slug]-evidence.md

[N stories total: N Logic, N Integration, N Visual/Feel, N UI, N Config/Data]

Use the available user-input mechanism:

• Prompt: "May I write these [N] stories to production/epics/[epic-slug]/?"
• Options: [A] Yes — write all [N] stories / [B] Not yet — I want to review or adjust first

6. Write Story Files

For each story, write production/epics/[epic-slug]/story-[NNN]-[slug].md:

# Story [NNN]: [title]

> **Epic**: [epic name]
> **Status**: Ready
> **Layer**: [Foundation / Core / Feature / Presentation]
> **Type**: [Logic | Integration | Visual/Feel | UI | Config/Data]
> **Estimate**: [hours or t-shirt size — fill before sprint planning]
> **Manifest Version**: [date from control-manifest.md header]
> **Last Updated**: [set by $ai-game-studio:dev-story when implementation begins]

## Context

**GDD**: `design/gdd/[filename].md`
**Requirement**: `TR-[system]-NNN`
*(Requirement text lives in `docs/architecture/tr-registry.yaml` — read fresh at review time)*

**ADR Governing Implementation**: [ADR-NNNN: title]
**ADR Decision Summary**: [1-2 sentence summary of what the ADR decided]

**Engine**: [name + version] | **Risk**: [LOW / MEDIUM / HIGH]
**Engine Notes**: [from ADR Engine Compatibility section — post-cutoff APIs, verification required]

**Control Manifest Rules (this layer)**:
- Required: [relevant required pattern]
- Forbidden: [relevant forbidden pattern]
- Guardrail: [relevant performance guardrail]

---

## Acceptance Criteria

*From GDD `design/gdd/[filename].md`, scoped to this story:*

- [ ] [criterion 1 — directly from GDD]
- [ ] [criterion 2]
- [ ] [performance criterion if applicable]

---

## Implementation Notes

*Derived from ADR-NNNN Implementation Guidelines:*

[Specific, actionable guidance from the ADR. Do not paraphrase in ways that
change meaning. This is what the programmer reads instead of the ADR.]

---

## Out of Scope

*Handled by neighbouring stories — do not implement here:*

- [Story NNN+1]: [what it handles]

---

## QA Test Cases

*Written by qa-lead at story creation. The developer implements against these — do not invent new test cases during implementation.*

**[For Logic / Integration stories — automated test specs]:**

- **AC-1**: [criterion text]
  - Given: [precondition]
  - When: [action]
  - Then: [assertion]
  - Edge cases: [boundary values / failure states]

**[For Visual/Feel / UI stories — manual verification steps]:**

- **AC-1**: [criterion text]
  - Setup: [how to reach the state]
  - Verify: [what to look for]
  - Pass condition: [unambiguous pass description]

---

## Test Evidence

**Story Type**: [type]
**Required evidence**:
- Logic: `tests/unit/[system]/[story-slug]_test.[ext]` — must exist and pass
- Integration: `tests/integration/[system]/[story-slug]_test.[ext]` OR playtest doc
- Visual/Feel: `production/qa/evidence/[story-slug]-evidence.md` + sign-off
- UI: `production/qa/evidence/[story-slug]-evidence.md` or interaction test
- Config/Data: smoke check pass (`production/qa/smoke-*.md`)

**Status**: [ ] Not yet created

---

## Dependencies

- Depends on: [Story NNN-1 must be DONE, or "None"]
- Unlocks: [Story NNN+1, or "None"]

Also update production/epics/[epic-slug]/EPIC.md

Replace the "Stories: Not yet created" line with a populated table:

## Stories

| # | Story | Type | Status | ADR |
|---|-------|------|--------|-----|
| 001 | [title] | Logic | Ready | ADR-NNNN |
| 002 | [title] | Integration | Ready | ADR-MMMM |

Also update production/epics/index.md

Find the row in the index table matching this epic (by epic name or slug). Update its Stories column from Not yet created to [N] stories (where N is the count just written). If the index file does not exist, skip silently.

7. After Writing

Use the available user-input mechanism to close with context-aware next steps:

Check:

• Are there other epics in production/epics/ without stories yet? List them.
• Is this the last epic? If so, include $ai-game-studio:sprint-plan as an option.

Widget:

• Prompt: "[N] stories written to production/epics/[epic-slug]/. What next?"
• Options (include all that apply):
  • [A] Start implementing — run $ai-game-studio:story-readiness [first-story-path] (Recommended)
  • [B] Create stories for [next-epic-slug] — run $ai-game-studio:create-stories [slug] (only if other epics have no stories yet)
  • [C] Plan the sprint — run $ai-game-studio:sprint-plan new (only if all epics have stories)
  • [D] Stop here for this session

Note in output: "Work through stories in order — each story's Depends on: field tells you what must be DONE before you can start it."

Collaborative Protocol

1. Read before presenting — load all inputs silently before showing the story list
2. Ask once — present all stories for the epic in one summary, not one at a time
3. Warn on blocked stories — flag any story with a Proposed ADR before writing
4. Ask before writing — get approval for the full story set before writing files
5. No invention — acceptance criteria come from GDDs, implementation notes from ADRs, rules from the manifest
6. Never start implementation — this skill stops at the story file level

After writing (or declining):

• Verdict: COMPLETE — [N] stories written to production/epics/[epic-slug]/. Run $ai-game-studio:story-readiness → $ai-game-studio:dev-story to begin implementation.
• Verdict: BLOCKED — user declined. No story files written.

Codex portability

Use the search, file-editing, shell, user-input, and subagent capabilities available in the active Codex surface. Use PowerShell syntax on Windows and POSIX syntax on macOS/Linux; do not require a Unix compatibility layer on Windows. Inherit the active model and permission mode, and do not weaken approval or sandbox boundaries.