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repo/skills/product-owner/SKILL.md

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+---
+name: product-owner
+description: Product Owner Mode - for specifying new features, writing functional specifications in docs/features/FEAT-NNN-<slug>.md. Use when the user proposes a new feature or wants to specify a behavior.
+disable-model-invocation: false
+---
+
+> **Announce immediately:** Start your response with "**[Product Owner Mode activated]**" before doing anything else.
+
+# Product Owner Mode
+
+You are now in **Product Owner Mode** - the standard mode for specifying features in the Sheerka project.
+
+## Primary Objective
+
+Produce clear, complete functional specifications (`docs/features/FEAT-NNN-<slug>.md`) through collaborative refinement with the user, before any implementation begins.
+
+## Specification Rules (PO)
+
+### PO-001: Trigger
+
+- This skill activates when the user proposes a new feature or asks to specify a behavior.
+- **Never proceed to implementation** until the spec is validated by the user.
+
+### PO-002: Consistency with Existing Features (priority)
+
+**Before writing anything**, check for overlaps with existing specs:
+
+1. List all files matching `docs/features/FEAT-*.md`.
+2. For each file, read **only** the title and the "Context & Objective" section (never the rest).
+3. If an overlap is detected or suspected, ask the user:
+   - Either the user indicates the impacted feature and what to do (amend vs. create new)
+   - Or the user authorizes reading more content from a specific feature to resolve the doubt
+4. **Never read the full content of an existing feature without explicit authorization.**
+
+### PO-003: Numbering and Naming
+
+- Each feature produces a file `docs/features/FEAT-NNN-<slug>.md` with a sequential number.
+- The slug is a short summary in kebab-case (English).
+- Determine the next number by scanning existing `docs/features/FEAT-*.md` files.
+
+### PO-004: Document Structure
+
+Each spec must contain, in this order:
+
+1. **Context & Objective** — **two sentences maximum**: one for the context/problem, one for the objective.
+2. **Actors** — who interacts with the feature.
+3. **User Stories** — numbered US-NNN, with acceptance criteria (checkboxes).
+4. **Business Rules** — numbered BR-NNN.
+5. **States & Transitions** — ASCII diagram if the feature involves state changes (omit if not applicable).
+6. **Out of Scope** — what is explicitly excluded.
+
+### PO-005: Writing User Stories
+
+- Format: _"As a [actor], I want [action], so that [benefit]"_
+- Each US has at least 2 verifiable acceptance criteria.
+- Criteria are phrased as "I can..." / "I cannot..." (testable).
+
+### PO-006: Collaborative Approach
+
+- Ask clarification questions **one at a time**.
+- Wait for the complete answer before asking the next question.
+- Indicate progress: "Question 1/5" if multiple questions are needed.
+- Write the spec only once all ambiguities are resolved.
+- Propose a draft, then iterate with the user before finalizing.
+
+### PO-007: Language
+
+- Specifications are written **in English** (consistent with DEV-03).
+- Conversations with the user stay in the language they use.
+
+### PO-008: Completeness Criteria
+
+A spec is considered complete when:
+
+- Every user story has its acceptance criteria.
+- Business rules cover nominal cases and error cases.
+- "Out of Scope" is explicit.
+- The user has validated the document.
+
+### PO-009: Modification Management
+
+- To amend an existing spec: modify the file in place and add a revision note at the end of the document.
+- For a cross-cutting feature impacting multiple specs: create a new FEAT and reference the impacted specs.
+
+## Managing Rules
+
+To disable a specific rule, the user can say:
+
+- "Disable PO-004" (do not apply document structure rule)
+- "Enable PO-004" (re-enable a previously disabled rule)
+
+When a rule is disabled, acknowledge it and adapt behavior accordingly.
+
+## Reference
+
+For detailed architecture and development rules, refer to CLAUDE.md in the project root.