diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3385c0b..531bacb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,13 @@ All notable changes to `openarmature-python` are documented in this file.
 
 The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/). The package follows [Semantic Versioning](https://semver.org/); pre-1.0 minor bumps may carry behavioral changes per [spec governance](https://github.com/LunarCommand/openarmature-spec/blob/main/GOVERNANCE.md).
 
-## [Unreleased]
+## [0.6.0] — 2026-05-16
+
+Consolidated release for the five-PR batch: structured output
+(proposal 0016), image content blocks (proposal 0015), prompt
+management (proposal 0017), state migration for checkpoints
+(proposal 0014), and parallel branches (proposal 0011). Pinned spec
+jumps from v0.10.0 to v0.16.1.
 
 ### Added
 
@@ -35,8 +41,11 @@ The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/). The
 
 ### Notes
 
-- **Release gate cleared with PR-5 (proposal 0011).** All five proposals in the batch ({0011, 0014, 0015, 0016, 0017}) are now implemented. Tag the consolidated release once this PR merges.
-- **Pre-1.0 MINOR.** Existing free-form callers (no `response_schema`) see no behavior change — the new field defaults to `None`, the wire body omits `response_format`, and `Response.parsed` remains absent.
+- **Pre-1.0 MINOR.** Two behavioral changes ship in this release:
+  - **Retry-MW attempt-index propagation.** Events from inner nodes of a subgraph wrapped by retry middleware (branch middleware, fan-out `instance_middleware`, or any retry on a wrapping subgraph) now carry the wrapping retry's attempt counter on each re-invocation rather than starting at 0. Per-node retry behavior is unchanged. Matches spec v0.16.1's clarification of the graph-engine §6 contract.
+  - **`CheckpointRecord.schema_version` semantic shift.** Previously a backend-internal record-shape version (the removed `CHECKPOINT_SCHEMA_VERSION = "1"` constant), now the user-facing state-schema version per spec §10.2. Pre-v0.6.0 records carrying `"1"` are reinterpreted as user-facing v1 identifiers; declare `schema_version="1"` on the corresponding state class or discard the records.
+
+  Existing callers who don't wrap subgraphs in retry middleware and don't declare a state-schema version see no behavior change.
 
 ## [0.5.0] — 2026-05-10
 
diff --git a/pyproject.toml b/pyproject.toml
index a5c222e..6e6dbfc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "openarmature"
-version = "0.5.0"
+version = "0.6.0"
 description = "Workflow framework for LLM pipelines and tool-calling agents."
 readme = "README.md"
 requires-python = ">=3.12"
diff --git a/src/openarmature/__init__.py b/src/openarmature/__init__.py
index 2496083..d1e2dc4 100644
--- a/src/openarmature/__init__.py
+++ b/src/openarmature/__init__.py
@@ -1,4 +1,4 @@
 """OpenArmature — workflow framework for LLM pipelines and tool-calling agents."""
 
-__version__ = "0.5.0"
+__version__ = "0.6.0"
 __spec_version__ = "0.16.1"
diff --git a/tests/test_smoke.py b/tests/test_smoke.py
index 6f6c0ff..91d7bd8 100644
--- a/tests/test_smoke.py
+++ b/tests/test_smoke.py
@@ -8,7 +8,7 @@
 
 
 def test_package_versions() -> None:
-    assert openarmature.__version__ == "0.5.0"
+    assert openarmature.__version__ == "0.6.0"
     assert openarmature.__spec_version__ == "0.16.1"
 
 
diff --git a/uv.lock b/uv.lock
index 868e158..58837fc 100644
--- a/uv.lock
+++ b/uv.lock
@@ -885,7 +885,7 @@ wheels = [
 
 [[package]]
 name = "openarmature"
-version = "0.5.0"
+version = "0.6.0"
 source = { editable = "." }
 dependencies = [
     { name = "httpx" },