docs(prd): add OpenPRD 0001 — LogicSRC OpenOntology specification

Starts the repo's numbered OpenPRD collection under prd/ and lands the
first proposal: LogicSRC OpenOntology, a provider-neutral, storage-agnostic
contract for durable, source-backed domain knowledge shared by humans and
agents (entity types, claims, provenance, temporal history, portable
queries, change-set governance, and CLI/SDK/MCP/REST surfaces).

Status is Draft — 8 open questions remain before Accepted, notably the
globally unique ID profile, the package signature envelope, and which
existing web app owns the /openontology route.

Also adds prd/0000-template.md (copy of docs/openprd/0000-template.md, which
the OpenPRD layout expects inside prd/) and prd/README.md as the index.

Verified against the repo's own standard: front-matter validates against
openprd-prd.schema.json via @logicsrc/validators, id matches the filename
prefix, all eight body sections present in order, requirements contiguous
R1-R210.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

prd/0000-template.md

@@ -0,0 +1,50 @@
+---
+openprd: "0.2"
+id: "0000"
+title: "Short imperative title — start with a verb if possible"
+status: Draft
+authors:
+  - you@example.com
+created: 2026-01-01
+updated: 2026-01-01
+repo:
+discussion:
+implementation:
+tags:
+supersedes:
+superseded-by:
+---
+
+## Problem
+
+The user/business problem, and why it matters now. Cite the ask, the incident,
+or the constraint — not aesthetics.
+
+## Goals
+
+What success looks like, as outcomes (not features).
+
+## Non-Goals
+
+Explicitly out of scope, to bound the work.
+
+## Users
+
+Who this is for; personas or segments.
+
+## Requirements
+
+- R1 [P0] First required capability.
+- R2 [P1] Next capability.
+
+## UX Notes
+
+Flows, states, and constraints that shape the experience.
+
+## Success Metrics
+
+How the goals will be measured.
+
+## Risks & Open Questions
+
+- Known risk or decision still owed.

prd/README.md

@@ -0,0 +1,9 @@
+# LogicSRC PRDs
+
+Numbered [OpenPRD](../docs/openprd.md) product requirements documents for this repo. One file per PRD at `prd/<id>-<slug>.md`, four-digit ids, no gaps. `0000-template.md` is the copy-paste starting point.
+
+Status lives in each file's front-matter and is the source of truth: `Draft → Review → Accepted → Final`, or `Rejected` / `Withdrawn` / `Superseded`.
+
+| ID | Title | Status | Tags |
+| --- | --- | --- | --- |
+| [0001](./0001-add-logicsrc-openontology-spec.md) | Add the LogicSRC OpenOntology specification | Draft | openontology, ontology, knowledge-graph, agents, mcp, schemas |