Translate PRD intent, roadmap asks, or product discussions into an implementation-ready capability plan that exposes constraints, invariants, interfaces, and unresolved decisions before multi-service work starts. Use when the user needs an ECC-native PRD-to-SRS lane instead of vague planning prose.

Product Capability This skill turns product intent into explicit engineering constraints. Use it when the gap is not "what should we build?" but "what exactly must be true before implementation starts?" When to Use A PRD, roadmap item, discussion, or founder note exists, but the implementation constraints are still implicit A feature crosses multiple services, repos, or teams and needs a capability contract before coding Product intent is clear, but architecture, data, lifecycle, or policy implications are still fuzzy Senior engineers keep restating the same hidden assumptions during review You need a reusable artifact that can survive across harnesses and sessions Canonical Artifact If the repo has a durable product context file such as PRODUCT.md , docs/product/ , or a program spec directory, update it there. If no capability manifest exists yet, create one using the template at: docs/examples/product capability template.md The goal is not to create another planning stack. The goal is to make hidden capability constraints durable and reusable. Non Negotiable Rules Do not invent product truth. Mark unresolved questions explicitly. Separate user visible promises from implementation details. Call out what is fixed policy, what is architecture preference, and what is still open. If the request conflicts with existing repo constraints, say so clearly instead of smoothing it over. Prefer one reusable capability artifact over scattered ad hoc notes. Inputs Read only what is needed: 1. Product intent issue, discussion, PRD, roadmap note, founder message 2. Current architecture relevant repo docs, contracts, schemas, routes, existing workflows 3. Existing capability context PRODUCT.md , design docs, RFCs, migration notes, operating model docs 4. Delivery constraints auth, billing, compliance, rollout, backwards compatibility, performance, review policy Core Workflow 1. Restate the capability Compress the ask into one precise statement: who the user or operator is what new capability exists after this ships what outcome changes because of it If this statement is weak, the implementation will drift. 2. Resolve capability constraints Extract the constraints that must hold before implementation: business rules scope boundaries invariants trust boundaries data ownership lifecycle transitions rollout / migration requirements failure and recovery expectations These are the things that often live only in senior engineer memory. 3. Define the implementation facing contract Produce an SRS style capability plan with: capability summary explicit non goals actors and surfaces required states and transitions interfaces / inputs / outputs data model implications security / billing / policy constraints observability and operator requirements open questions blocking implementation 4. Translate into execution End with the exact handoff: ready for direct implementation needs architecture review first needs product clarification first If useful, point to the next ECC native lane: project flow ops workspace surface audit api connector builder dashboard builder tdd workflow verification loop Output Format Return the result in this order: Good Outcomes Product intent is now concrete enough to implement without rediscovering hidden constraints mid PR. Engineering review has a durable artifact instead of relying on memory or Slack context. The resulting plan is reusable across Claude Code, Codex, Cursor, OpenCode, and ECC 2.0 planning surfaces.

product-capability