@@ -81,8 +81,11 @@ jobs:
         run: uv sync --all-extras --all-packages
 
       - name: Build package
+        # Build by path, not --package: `uv build --package` resolves against
+        # workspace.members, and packages/fastmcp + packages/mcp-fastmcp are
+        # deliberately excluded from the workspace (see ECO-198).
         run: |
-          uv build --package ${{ needs.detect-package.outputs.package }} 
+          uv build --out-dir dist "${{ needs.detect-package.outputs.package-dir }}"
 
       - name: Publish to PyPI
         run: |
 
@@ -3,15 +3,19 @@ dev-setup:
     uv run pre-commit install
     uv sync --all-extras --all-packages
 
-# Build the project
+# Build the project. packages/fastmcp and packages/mcp-fastmcp sit outside the
+# uv workspace (they hold mcp<2.0; see ECO-198), so they sync separately.
 build:
     uv sync --all-packages
+    cd packages/fastmcp && uv sync --extra test
+    cd packages/mcp-fastmcp && uv sync --extra test
 
 # Run tests for all packages
 test: build
     just test-package oauth
     just test-package starlette
     just test-package mcp
+    just test-package fastmcp
     just test-package mcp-fastmcp
     just test-package a2a
 
@@ -23,13 +27,18 @@ test-package PACKAGE:
 test-file PACKAGE FILE:
     cd packages/{{PACKAGE}} && uv run --extra test pytest tests/{{FILE}} -v
 
-# Run tests with coverage enforcement. mcp sits at 60% because well-tested server
-# primitives moved to oauth/starlette, leaving the under-tested client integrations
-# (CrewAI, LangChain, OpenAI) as the dominant share of what remains.
+# Run tests with coverage enforcement. mcp stays at 60%, but the denominator it
+# measures grew: 2679 statements against ~2500 before, because all four
+# *_agents.py client integrations are now imported by
+# tests/.../test_tool_schema_reads.py and so are counted. Dropping the agent
+# frameworks alone would have shrunk it to 2036 and inflated the percentage to
+# ~75 on less measured code; that test is what keeps the gate honest. Headroom
+# is thin (60.88% actual) -- if it dips, add coverage rather than lowering this.
 test-coverage: build
     cd packages/oauth && uv run --extra test pytest tests/ -v --cov=src --cov-report=term-missing --cov-fail-under=70
     cd packages/starlette && uv run --extra test pytest tests/ -v --cov=src --cov-report=term-missing --cov-fail-under=55
     cd packages/mcp && uv run --extra test pytest tests/ -v --cov=src --cov-report=term-missing --cov-fail-under=60
+    cd packages/fastmcp && uv run --extra test pytest tests/ -v --cov=src --cov-report=term-missing --cov-fail-under=60
     cd packages/mcp-fastmcp && uv run --extra test pytest tests/ -v --cov=src --cov-report=term-missing --cov-fail-under=70
     cd packages/a2a && uv run --extra test pytest tests/ -v --cov=src --cov-report=term-missing --cov-fail-under=55
 
 
@@ -12,7 +12,12 @@ dependencies = [
     "httpx>=0.27.2",
     "keycardai-oauth>=0.7.0",
     "fastmcp>=3.1.0",
-    "keycardai-mcp>=0.15.0",
+    # Pinned to the 1.x line, both ends load-bearing. fastmcp 3.x pins
+    # mcp<2.0, and keycardai-mcp 1.x is the release line that agrees (2.x
+    # requires mcp>=2.0). 0.x releases before 0.27 declare an unbounded mcp
+    # floor and resolve onto mcp 2.0, which fails to import. Move both ends
+    # together with the fastmcp 4.x bump (ECO-198).
+    "keycardai-mcp>=1,<2",
 ]
 keywords = ["fastmcp", "mcp", "model-context-protocol", "oauth", "token-exchange", "authentication", "keycard"]
 classifiers = [
@@ -35,6 +40,8 @@ classifiers = [
 test = [
     "pytest>=8.4.1",
     "pytest-asyncio>=1.1.0",
+    "pytest-cov>=6.2.1",
+    "requests>=2.32.0",
 ]
 
 [project.urls]
@@ -43,6 +50,14 @@ Repository = "https://github.com/keycardai/python-sdk"
 Documentation = "https://docs.keycardai.com"
 Issues = "https://github.com/keycardai/python-sdk/issues"
 
+[tool.uv.sources]
+# Only keycardai-mcp comes from the index: it is on mcp>=2.0 and this package is
+# on mcp<2.0, so the local copy is genuinely unusable here. Everything else is
+# path-linked so a breaking change in a sibling still fails this package's CI.
+keycardai-oauth = { path = "../oauth", editable = true }
+# keycardai-starlette stays on the index: it is a transitive dependency via
+# keycardai-mcp, and tool.uv.sources only redirects direct dependencies.
+
 [build-system]
 requires = ["hatchling", "uv-dynamic-versioning"]
 build-backend = "hatchling.build"
 
@@ -38,6 +38,14 @@ Repository = "https://github.com/keycardai/python-sdk"
 Documentation = "https://docs.keycardai.com"
 Issues = "https://github.com/keycardai/python-sdk/issues"
 
+[tool.uv.sources]
+# keycardai-fastmcp is path-linked: it sits on the same mcp<2.0 major as this
+# bridge, so testing against the local copy is both possible and correct.
+keycardai-fastmcp = { path = "../fastmcp", editable = true }
+keycardai-oauth = { path = "../oauth", editable = true }
+# keycardai-starlette stays on the index: it is a transitive dependency via
+# keycardai-mcp, and tool.uv.sources only redirects direct dependencies.
+
 [build-system]
 requires = ["hatchling", "uv-dynamic-versioning"]
 build-backend = "hatchling.build"