diff --git a/pyproject.toml b/pyproject.toml
index e7f6c5f..b538500 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "ratatoskr"
-version = "0.20.9"
+version = "0.20.10"
 description = "Worldtree Conversation API debug TUI — multi-pane observability dashboard"
 readme = "README.md"
 requires-python = ">=3.12"
@@ -30,7 +30,7 @@ web = [
 # from the debug TUI. Recipe: bifrost/docs/implementing-a-consumer.md.
 provider = [
     "ratatoskr[web]",       # reuse the starlette + uvicorn ASGI stack
-    "bifrost==1.1.0",       # consumer engines + library. 1.1.0 = wire v0.7 (ADDITIVE over frozen v0.6: memory.scan sort directive + describe_store sortable_chunk_fields; build_combined_app surface unchanged). v0.6 stays frozen+valid; we don't use scan-sort (gated verb, advertised-unsupported) — repin is reference-impl currency. (1.0.0 = first STABLE, wire v0.6 FROZEN; 0.8.0/v0.6 scope_all/scope_any #11; 0.7.0/v0.5 agent_self)
+    "bifrost==1.1.1",       # consumer engines + library. 1.1.1 = frozen-wire serialization fix (ADR-0008): additive capability fields are gated on the NEGOTIATED wire, so a v0.6-negotiated describe_store handshake stays v0.6-clean. 1.1.0 leaked the v0.7-additive `sortable_chunk_fields` into v0.6 StoreCapabilities → a strict v0.6 client (additionalProperties:false) rejects our server's handshake. Wire schemas + pins UNCHANGED (serialization-correctness only); our v0.7 handshake with Worldtree b47 is unaffected. (1.1.0 = wire v0.7 additive: memory.scan sort + sortable_chunk_fields; 1.0.0 = first STABLE, wire v0.6 FROZEN; 0.8.0/v0.6 scope_all/scope_any #11; 0.7.0/v0.5 agent_self)
     "jsonschema>=4",        # bifrost runtime dep — envelope validation
     "sqlite-vec>=0.1.6",    # vector index for the memory plane (vec0 virtual table)
 ]
diff --git a/uv.lock b/uv.lock
index 05c8bf5..5e972dd 100644
--- a/uv.lock
+++ b/uv.lock
@@ -190,14 +190,14 @@ wheels = [
 
 [[package]]
 name = "bifrost"
-version = "1.1.0"
+version = "1.1.1"
 source = { registry = "https://gitea.phasefinal.com/api/packages/vh/pypi/simple/" }
 dependencies = [
     { name = "jsonschema" },
 ]
-sdist = { url = "https://gitea.phasefinal.com/api/packages/vh/pypi/files/bifrost/1.1.0/bifrost-1.1.0.tar.gz", hash = "sha256:a481ccbd82905e140e5c916d2299b0f46ec219dae2dc854c496dc163f960ab41" }
+sdist = { url = "https://gitea.phasefinal.com/api/packages/vh/pypi/files/bifrost/1.1.1/bifrost-1.1.1.tar.gz", hash = "sha256:0934c5fdf14823766346e591f5a16ab57a137cf06df794152318b5ccef0fb8e8" }
 wheels = [
-    { url = "https://gitea.phasefinal.com/api/packages/vh/pypi/files/bifrost/1.1.0/bifrost-1.1.0-py3-none-any.whl", hash = "sha256:d0ef5f0a8162ccdfa14cfd7d767e20ef279b8ec2fb29cdd7a2f05ed57c8c5fb5" },
+    { url = "https://gitea.phasefinal.com/api/packages/vh/pypi/files/bifrost/1.1.1/bifrost-1.1.1-py3-none-any.whl", hash = "sha256:dab551f8ad26464168f17108cb19564da56ee8e4789264a401e7a14463ab1576" },
 ]
 
 [[package]]
@@ -1052,7 +1052,7 @@ wheels = [
 
 [[package]]
 name = "ratatoskr"
-version = "0.20.9"
+version = "0.20.10"
 source = { editable = "." }
 dependencies = [
     { name = "httpx" },
@@ -1086,7 +1086,7 @@ web = [
 
 [package.metadata]
 requires-dist = [
-    { name = "bifrost", marker = "extra == 'provider'", specifier = "==1.1.0", index = "https://gitea.phasefinal.com/api/packages/vh/pypi/simple/" },
+    { name = "bifrost", marker = "extra == 'provider'", specifier = "==1.1.1", index = "https://gitea.phasefinal.com/api/packages/vh/pypi/simple/" },
     { name = "httpx", specifier = ">=0.27" },
     { name = "httpx-sse", specifier = ">=0.4" },
     { name = "jsonschema", marker = "extra == 'provider'", specifier = ">=4" },