chore(release): PyPI 0.15.2 — Python output-prompt nested-object fix

Python-only patch. npm/NuGet stay 0.15.1, Maven Central 7.7.1. Ships the fix for the
output-prompt emitter crashing gen/verify on a nested field.object payload (#144).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GF9xLEQZaPus5Y6opk398n

Author: claude

CHANGELOG.md

@@ -7,6 +7,13 @@ this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 
 ## [Unreleased]
 
+## [0.15.2] — 2026-07-02
+
+_PyPI `0.15.2` — Python-only patch (npm/NuGet stay `0.15.1`, Maven Central stays `7.7.1`)._
+
+### Fixed
+- **Python — the output-prompt spec emitter crashed `gen` / `verify --codegen` on a nested `field.object` payload.** A `template.output` whose payload value-object had a nested `field.object` child emitted invalid Python: the nested-object branch appended an inline `#` comment to the `PromptField` literal, and since the whole `OutputFormatSpec(...)` is one line, the `#` swallowed the closing `])` — an unterminated list (`SyntaxError`) that hard-crashed codegen and the drift gate (not just a diff). Flat payloads were unaffected. Python-only (the other four ports use inline-safe `/* */` block comments). The nested field now emits a valid `FieldKind.OBJECT` placeholder (`nested=None`).
+
 ## [0.15.1] — 2026-07-01
 
 _Maven Central `7.7.1` · PyPI `0.15.1` · NuGet `0.15.1` · npm `0.15.1`._

server/python/pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "metaobjects"
-version = "0.15.1"
+version = "0.15.2"
 description = "Cross-language metadata standard: declare typed entities once, generate idiomatic drift-checked code across languages — Python port."
 readme = "README.md"
 requires-python = ">=3.11"