diff --git a/CHANGELOG.md b/CHANGELOG.md
index c717cc6..0c84d6a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,11 +7,17 @@ the GitHub Release body, so a release with no entry here fails.
 
 Versioning follows [docs/versioning.md](docs/versioning.md).
 
-## [0.11.2] - 2026-09-25
+## [0.12.0] - 2026-09-25
+
+### Added
+
+- `loop_types.wall_deadline_remaining_s` is now included in `__all__`. `model_profile.to_openai_tool_calls` is public for host facades; the former `_to_openai_tool_calls` name remains a compatibility alias.
 
 ### Fixed
 
-- `OpenAIClient` and `OpenAIResponsesClient` now treat an empty `api_key` as unset and fall back to `OPENAI_API_KEY`, matching the behavior of `None`.
+- `run_agent_loop` now assigns text-mode tool calls IDs unique across turns and resumed histories, preventing tool-result and spill-recovery lookups from resolving to another turn. Native provider IDs remain unchanged. Consumers asserting exact synthesized IDs should accept the new `call_{turn}_{idx}_{8 hex}` shape; direct parser and `execute_tools` IDs are unchanged.
+- `OpenAIClient` and `OpenAIResponsesClient` now treat an empty `api_key` as unset and fall back to `OPENAI_API_KEY`, matching the behavior of `None`. (Prepared as 0.11.2, which was never published; it ships in 0.12.0.)
+- `TaskBoardObserver` now runs as a critical observer so its task-board reminder is collected and injected into the next turn. Hosts that subclassed it only to set `critical = True` can remove that override.
 
 ## [0.11.1] - 2026-09-24
 
diff --git a/changes/40.fix.md b/changes/40.fix.md
deleted file mode 100644
index fcd12bc..0000000
--- a/changes/40.fix.md
+++ /dev/null
@@ -1 +0,0 @@
-`run_agent_loop` now assigns text-mode tool calls IDs unique across turns and resumed histories, preventing tool-result and spill-recovery lookups from resolving to another turn. Native provider IDs remain unchanged. Consumers asserting exact synthesized IDs should accept the new `call_{turn}_{idx}_{8 hex}` shape; direct parser and `execute_tools` IDs are unchanged.
diff --git a/changes/42.fix.md b/changes/42.fix.md
deleted file mode 100644
index 30143f1..0000000
--- a/changes/42.fix.md
+++ /dev/null
@@ -1 +0,0 @@
-`TaskBoardObserver` now runs as a critical observer so its task-board reminder is collected and injected into the next turn. Hosts that subclassed it only to set `critical = True` can remove that override.
diff --git a/changes/43.feature.md b/changes/43.feature.md
deleted file mode 100644
index e62d589..0000000
--- a/changes/43.feature.md
+++ /dev/null
@@ -1 +0,0 @@
-`loop_types.wall_deadline_remaining_s` is now included in `__all__`. `model_profile.to_openai_tool_calls` is public for host facades; the former `_to_openai_tool_calls` name remains a compatibility alias.
diff --git a/pyproject.toml b/pyproject.toml
index 65ce5ec..447a00f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "apodex-agent-core"
-version = "0.11.2"
+version = "0.12.0"
 description = "Shared, product-neutral runtime primitives for Apodex agents"
 readme = "README.md"
 license = "Apache-2.0"
diff --git a/uv.lock b/uv.lock
index 459ea30..8d53616 100644
--- a/uv.lock
+++ b/uv.lock
@@ -50,7 +50,7 @@ wheels = [
 
 [[package]]
 name = "apodex-agent-core"
-version = "0.11.2"
+version = "0.12.0"
 source = { editable = "." }
 dependencies = [
     { name = "anthropic", extra = ["bedrock"] },