version: "1.0.3" name: product description: 'Create or refine PRODUCT.md while separating evidence, aspiration, users, value, and non-goals. Triggers: "product", "create PRODUCT.md", "product boundary".' practices: [lean-startup, ddd-bounded-context] hexagonal_role: domain consumes: [] produces: [PRODUCT.md] context_rel:

• kind: supplier-to

with: plan skill_api_version: 1 user-invocable: true context: window: inherit intent: mode: task intel_scope: topic metadata: tier: product dependencies: [] capabilities: [shape_product_boundary] effects: [write_product_document] canonical_status: canonical disposition: keep_specialist output_contract: PRODUCT.md

Product

Create or refine a product contract with the user's authority.

The contract works because it forces every claim into evidence or labeled aspiration; if a reader cannot tell which is which, the document has failed.

1. Inspect existing product, README, goals, release, and evidence sources.
2. Ask only for decisions that cannot be grounded safely from those sources.
3. State mission, users, pains, value, differentiation, and non-goals.
4. Separate evidence from hope under two required headings. Put every grounded

claim under ## Proven, each carrying a resolvable citation (a README, release, test, or evidence source). Put unproven hopes, evidence gaps, and not-yet-measured success signals under ## Assumptions. A claim that cannot cite a source belongs under ## Assumptions, never ## Proven.

1. Preserve an existing PRODUCT.md unless the user authorizes replacement.
2. Return the document to the caller; Plan may use it as intent context.

Named failure mode — aspiration laundering: an unproven hope written in the ## Proven section; once laundered, every downstream plan inherits a false premise. Detector: any ## Proven claim without a resolvable citation is a laundered aspiration — move it to ## Assumptions or cite it.

Anti-pattern: rewriting a healthy PRODUCT.md wholesale because the session has fresh opinions. Corrective: refine only the sections the user asked to change and preserve the rest byte-for-byte.

Product does not select work, invoke a loop, repair itself, validate itself, or choose delivery.