diff --git a/CHANGELOG.md b/CHANGELOG.md
index 40390cf2..2bdaa888 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## v0.8.6 - 2026-07-24
+
+### Refactor
+
+- single provider registry — collapse 3 hand-synced dispatch tables (#649)
+- single scalar/aggregate dispatch — unify the 3-way evaluator split (#653)
+- extract build() passes 1.5-1.8 into named functions (#652)
+- split five modes into impact/ submodules + fixture-based unit tests (#648)
 ## v0.8.5 - 2026-07-18
 
 ### Bug Fixes
diff --git a/Cargo.toml b/Cargo.toml
index c7791d38..eadc1115 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -21,7 +21,7 @@ exclude = [
 resolver = "2"
 
 [workspace.package]
-version = "0.8.5"
+version = "0.8.6"
 edition = "2021"
 authors = ["E-NoR"]
 license = "MIT"
@@ -35,9 +35,9 @@ categories = ["development-tools"]
 # `scripts/release/cut-release.sh` bumps all four sites together on each release so
 # they never drift.
 [workspace.dependencies]
-ecp-core = { path = "crates/ecp-core", version = "0.8.5" }
-ecp-analyzer = { path = "crates/ecp-analyzer", version = "0.8.5" }
-ecp-mcp = { path = "crates/ecp-mcp", version = "0.8.5" }
+ecp-core = { path = "crates/ecp-core", version = "0.8.6" }
+ecp-analyzer = { path = "crates/ecp-analyzer", version = "0.8.6" }
+ecp-mcp = { path = "crates/ecp-mcp", version = "0.8.6" }
 
 # 工作區層級 lints 設定。目前無 override；後續可在此精準 allow/warn/deny
 # 特定 lint 規則，所有 crate 透過 [lints] workspace = true opt-in。