to-prd

description	Turn a settled kitcn capability or milestone rung into an ambitious, implementation-ready local PRD with decisions, owner maps, task packets, and proof contracts.
argument-hint	<source | milestone rung | capability>
name	to-prd
metadata	{"skiller":{"source":".agents/rules/to-prd.mdc"}}

To PRD

The PRD is the local source for a coherent capability. It must let auto full or task execute without inventing product, API, auth, or proof decisions.

Source Order

1. Latest user direction.
2. VISION.md and the selected milestone map.
3. Existing PRDs, ADRs, research, plans, and docs.
4. Public exports, runtime entry points, CLI/template owners, tests, fixtures, scenarios, and examples.
5. Proven OSS implementations from local clones when relevant.

If these contradict, repair or record the decision before publishing the PRD.

Scope Ambition

Write one PRD for one end-to-end developer outcome. Include all owners necessary for it to work: package/API, Convex runtime, auth/data flow, CLI/scaffold, examples, docs/package skill, fixtures/scenarios, and observability/proof.

Do not split supporting tests, guards, types, docs, or internal helpers into independent PRDs. Do not inflate the PRD with adjacent roadmap ideas.

Required Decisions

The PRD settles:

• user/developer problem and success story;
• familiar mental model and deviations from it;
• public API names, types, errors, and hard-cut stance;
• service/runtime entry points and Convex static import boundaries;
• canonical data, identity, auth/session, permission, and lifecycle flow;
• plugin/extensibility and bundle-size consequences;
• CLI commands, --json, --yes, and non-interactive behavior when relevant;
• source/generated owners and regeneration commands;
• migration/deletion behavior;
• docs, package skill, examples, fixtures, and scenario ownership;
• testing, benchmark, runtime, browser, and repository proof.

Unsettled irreversible choices go in an explicit decision table with a recommended answer and disconfirming evidence. Do not hide them in “TBD.”

Design Lane

When UI is part of the outcome, include the real subject, route, tokens, primitives, state matrix, accessibility, responsive behavior, and Browser proof. Link a prototype only as evidence; source implementation remains the owner.

Task Packets

Decompose directly into local packets inside the PRD.

Each packet has:

• outcome and owner files;
• prerequisites and conflict group;
• behavior/API decisions it consumes;
• source/generated work;
• acceptance and proof;
• explicit exclusions;
• blocking, parallel-join, or detached status.

Packets should be vertical and independently provable. Consolidate guard-only, test-only, docs-only, and refactor-only fragments into the behavior packet they support unless they have a genuinely separate owner and outcome.

PRD Template

# <Title> PRD

## Milestone Context
## Problem Statement
## Target Story
## Solution
## Vision Alignment
## Self-Grill Receipt
## Current Source Evidence
## Public API And Mental Model
## Service, Auth, And Data Flow
## Package And Bundle Ownership
## CLI, Scaffold, And Generated Ownership
## Design Lock
## Implementation Decisions
## Testing And Proof Decisions
## Task Packets
## Acceptance Criteria
## Source-Backed Claim Ledger
## Out Of Scope
## Open Decisions
## Done Means

Use N/A with reason for irrelevant sections; do not delete the reasoning surface.

Scoring Gate

Before publication, score 0-5 with citations:

• vision fit;
• user/developer leverage;
• source capability;
• public API and type clarity;
• auth/data-flow clarity;
• bundle/ownership safety;
• implementation readiness;
• proof and rollback strength;
• scope discipline.

Any dimension below 4 blocks implementation readiness unless the PRD records a real external blocker and safe boundary. Run a contradiction pass, self-grill, agent-native-reviewer when agent workflow is involved, then autoreview.

Publish

Write to docs/prds/<date>-<slug>.md, link it from the selected milestone or docs/README.md, and name the first packet owner. Publication is not implementation; auto full continues through packets, verification, and GitHub delivery when asked.