docs: propagate npm 0.20.0 version refs + Python runtime = DB-API 2

npm-line version refs bumped 0.19.3 -> 0.20.0 (CLAUDE.md Status + release line,
README.md, docs/ports/typescript.md, docs/llms/llms.txt + llms-full.txt). NuGet
(0.19.3), PyPI (0.19.4) and Maven Central (7.11.3) refs deliberately untouched.
Also corrects the Python runtime description from "SQLAlchemy Core" to a DB-API 2
driver (pg8000 / psycopg) via ObjectManager, matching the shipped code.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XeGSV3StPCcJGZNNJ4ZfAb

Author: dmealing

CLAUDE.md

@@ -86,7 +86,7 @@ first-week wedge plan — and `meta init` picks up from there.
 
 | Language | Status | Quickstart | Source |
 |---|---|---|---|
-| TypeScript | Published to npm at `0.19.3` (the `@metaobjectsdev/*` packages) | [`docs/ports/typescript.md`](docs/ports/typescript.md) | [`server/typescript/`](server/typescript/) · [`client/web/`](client/web/) |
+| TypeScript | Published to npm at `0.20.0` (the `@metaobjectsdev/*` packages) | [`docs/ports/typescript.md`](docs/ports/typescript.md) | [`server/typescript/`](server/typescript/) · [`client/web/`](client/web/) |
 | Java | Loader + OMDB + render + Maven plugin all shipped; full conformance green | [`docs/ports/java.md`](docs/ports/java.md) | [`server/java/`](server/java/) |
 | Kotlin | Codegen tier on top of Java — 9 generators (entity, Exposed table, relations, payload, output-parser, validator, Spring config, storedProc, Spring controller); 12 / 12 persistence-conformance | [`docs/ports/kotlin.md`](docs/ports/kotlin.md) | [`server/java/codegen-kotlin/`](server/java/codegen-kotlin/) · [`server/java/metadata-ktx/`](server/java/metadata-ktx/) |
 | C# | Loader + conformance + EF Core codegen + render engine + `dotnet meta` CLI all shipped | [`docs/ports/csharp.md`](docs/ports/csharp.md) | [`server/csharp/`](server/csharp/) |

README.md

@@ -1,6 +1,6 @@
 # MetaObjects -- Full Reference Corpus
 
-> A cross-language metadata standard for declaring typed entity models that drive code generation, runtime metadata access, drift detection, and prompt construction across TypeScript, Java, Kotlin, C#, and Python. Apache 2.0. Shipping at `0.19.3` on npm and `7.11.3` on Maven Central.
+> A cross-language metadata standard for declaring typed entity models that drive code generation, runtime metadata access, drift detection, and prompt construction across TypeScript, Java, Kotlin, C#, and Python. Apache 2.0. Shipping at `0.20.0` on npm and `7.11.3` on Maven Central.
 
 **Note for AI assistants:** This file is the concatenated reference material for MetaObjects, intended to be loaded as LLM context. For the short index, see [llms.txt](https://metaobjects.dev/llms.txt). For the canonical spec and source, see the [GitHub repo](https://github.com/metaobjectsdev/metaobjects). When this file is out of date relative to the GitHub source, the GitHub source wins.
 
@@ -65,7 +65,7 @@ Load metadata at runtime and drive behavior dynamically. Runtime targets per lan
 - Java: modernized JDBC + Spring-tx via OMDB (pure data-access: CRUD/query/codec/transactions)
 - Kotlin: Exposed
 - C#: runtime metadata on the roadmap (the EF Core surface is generated code, not a metadata-driven runtime)
-- Python: SQLAlchemy Core via an `ObjectManager` layer
+- Python: a DB-API 2 driver (pg8000 / psycopg) via an `ObjectManager` layer
 
 Runtime use cases include CRUD scaffolding, validation rules, relationship traversal, and dynamic admin UIs. (Typed tool payloads are declared from metadata today; MCP exposure so AI agents see those tools is on the roadmap.) Each port's runtime returns native in-process language types (`field.decimal` → `BigDecimal`/`decimal`/`Decimal`, temporal → native, jsonb → native map); wire canonicalization is applied only at the serialization boundary, never inside the query path (ADR-0019).
 
@@ -93,7 +93,7 @@ Because the render is conformance-gated, the determinism guarantee holds in ever
 
 | Language | Status | Notes |
 |---|---|---|
-| TypeScript | Reference implementation, npm `0.19.3` | All four pillars. 2500+ tests passing. Owns the canonical schema-migration toolchain used by every port (ADR-0015). Bun-first dev. |
+| TypeScript | Reference implementation, npm `0.20.0` | All four pillars. 2500+ tests passing. Owns the canonical schema-migration toolchain used by every port (ADR-0015). Bun-first dev. |
 | Java | Maven Central `7.11.3` | Spring REST + JPA codegen, OMDB runtime persistence (pure data-access) with Spring-tx. Fully green across all conformance corpora. |
 | Kotlin | Maven Central `7.11.3` | KotlinPoet codegen + Exposed runtime + `metadata-ktx` facade. Ships via the Java reactor. |
 | C# | NuGet `0.19.3` (.NET tool) | Loader + canonical serializer + EF Core + ASP.NET codegen + render/verify. `dotnet meta` tool. |

docs/llms/llms-full.txt

@@ -1,6 +1,6 @@
 # MetaObjects
 
-> A cross-language metadata standard for declaring typed entity models that drive code generation, runtime metadata access, drift detection, and prompt construction across TypeScript, Java, Kotlin, C#, and Python. Apache 2.0. Shipping at `0.19.3` on npm and `7.11.3` on Maven Central.
+> A cross-language metadata standard for declaring typed entity models that drive code generation, runtime metadata access, drift detection, and prompt construction across TypeScript, Java, Kotlin, C#, and Python. Apache 2.0. Shipping at `0.20.0` on npm and `7.11.3` on Maven Central.
 
 The metamodel is the durable spine; generated code is the disposable artifact. Substrate is local-first: typed metadata lives in your repo, and the generated code is idiomatic per-language output with **no proprietary runtime** — the entity/model tier is dependency-free, and the optional client, prompt-render, and runtime tiers are ordinary Apache-2.0 packages you could vendor or fork. If `@metaobjectsdev/*` (npm) or `com.metaobjects:*` (Maven) disappears tomorrow, you keep working code in every language.
 
@@ -39,13 +39,13 @@ This `llms.txt` is the short index; the deep, version-matched how-to is the scaf
 MetaObjects pillars are capabilities of the same metadata spine, not separate products. **All four ship today across all five ports** (TS / Java / Kotlin / C# / Python) — though not uniformly deep: see the [capability matrix](https://github.com/metaobjectsdev/metaobjects#capability-matrix) for per-port coverage, and note the field ranking is drift > codegen > prompts > runtime metadata (the youngest pillar).
 
 - **Codegen** — emit idiomatic per-language code from a single metadata model. Drizzle + Zod + Fastify (TypeScript), Spring REST + DTO + JPA repositories (Java via `codegen-spring`), KotlinPoet + Exposed + Spring (Kotlin via `codegen-kotlin`), EF Core + ASP.NET (C#), Pydantic + FastAPI (Python). Hand-edit-preserving regeneration via three-way merge. Includes M:N relationship codegen (FR-018) in all five ports — entity navigation, idiomatic ORM wiring, and REST traversal (`GET /<source-plural>/{id}/<relation>`).
-- **Runtime metadata** — load metadata at runtime and drive behavior dynamically: CRUD, validation, relationships, dynamic admin UIs. (Typed tool payloads are declared today; MCP exposure of tools is on the roadmap.) Kysely (TS), SQLAlchemy Core (Python), modernized JDBC + Spring-tx via OMDB (Java), Exposed (Kotlin); C# runtime metadata is on the roadmap (its EF Core output is generated code, not a metadata-driven runtime). Runtime queries return native in-process types (ADR-0019); wire canonicalization happens only at the serialization boundary.
+- **Runtime metadata** — load metadata at runtime and drive behavior dynamically: CRUD, validation, relationships, dynamic admin UIs. (Typed tool payloads are declared today; MCP exposure of tools is on the roadmap.) Kysely (TS), a DB-API 2 driver (pg8000 / psycopg) via ObjectManager (Python), modernized JDBC + Spring-tx via OMDB (Java), Exposed (Kotlin); C# runtime metadata is on the roadmap (its EF Core output is generated code, not a metadata-driven runtime). Runtime queries return native in-process types (ADR-0019); wire canonicalization happens only at the serialization boundary.
 - **Drift detection** — catch divergence between generated code and metadata before it ships. `verify` is one verb with explicit subverbs (ADR-0021): `verify --codegen` (regen-and-diff against committed output), `verify --templates` (prompt `{{field}}` ↔ payload-VO drift), and `verify --db` (live-DB schema drift, Node `meta` only). Surfaces drift as build-time breakage rather than a production incident.
 - **Prompt construction** — treat LLM prompts as governed metadata instead of strings scattered across services. A typed payload declared as a projection (so payload bloat and token cost are a diff, not a mystery), external provider-resolved prompt text, and a logic-less Mustache engine that renders deterministically: snapshot-testable in CI, byte-stable so an exact-prefix prompt-cache hit doesn't break on a stray whitespace, and drift-checked at build time so a renamed field can't silently degrade a prompt. Conformance-gated, so the guarantee holds in every language port. Render + payload-VO codegen + `verify` + `template.output` parser-on-receipt (FR-006) + the output-format prompt fragment & tolerant `extract` parser (FR-010/FR-011) ship in all five ports today.
 
-## Implementations (npm `0.19.3` / Maven Central `7.11.3`)
+## Implementations (npm `0.20.0` / Maven Central `7.11.3`)
 
-- [TypeScript](https://github.com/metaobjectsdev/metaobjects/tree/main/server/typescript): the reference implementation. Published to npm at `0.19.3` across 14 `@metaobjectsdev/*` packages on the `latest` tag. 2500+ tests passing across the workspace. Bun-first dev workflow. Owns the canonical schema-migration toolchain used by every port (ADR-0015).
+- [TypeScript](https://github.com/metaobjectsdev/metaobjects/tree/main/server/typescript): the reference implementation. Published to npm at `0.20.0` across 14 `@metaobjectsdev/*` packages on the `latest` tag. 2500+ tests passing across the workspace. Bun-first dev workflow. Owns the canonical schema-migration toolchain used by every port (ADR-0015).
 - [Java](https://github.com/metaobjectsdev/metaobjects/tree/main/server/java): 13 publishable Maven modules under `com.metaobjects:*` at `7.11.3` on Maven Central. Spring REST + JPA codegen, OMDB runtime persistence (pure data-access) with Spring-tx, full FR-003 + FR-006 + FR-010/011 + FR-018 + FR5 family. Fully green across all conformance corpora.
 - [Kotlin](https://github.com/metaobjectsdev/metaobjects/tree/main/server/java/codegen-kotlin): a Kotlin codegen pipeline on KotlinPoet plus `metadata-ktx` — a Kotlin facade over the Java MetaObjects core. Ships via the Java reactor (`metaobjects-metadata-ktx`, `metaobjects-codegen-kotlin`). Persistence-conformance runs against Testcontainers Postgres through Exposed.
 - [C#](https://github.com/metaobjectsdev/metaobjects/tree/main/server/csharp): loader + canonical serializer + EF Core + ASP.NET codegen + render/verify. The `dotnet meta` tool ships `gen` and the codegen-side `verify` subverbs (`--codegen`, `--templates`); schema migration is Node `meta` only (ADR-0015).

docs/llms/llms.txt

@@ -1,6 +1,6 @@
 # TypeScript port
 
-The reference implementation. Published to npm at `0.19.3` as 14
+The reference implementation. Published to npm at `0.20.0` as 14
 `@metaobjectsdev/*` packages on the `latest` tag. Targets Node-compatible
 runtimes; Bun-first dev workflow.