fix(cli,lib): wire PROTOCOL_VERSION import + track pyproject for __version__

src/amplifier_agent_cli/admin/version_info.py

@@ -15,9 +15,14 @@
 
 from amplifier_agent_lib import __version__
 
-#: The wire protocol version implemented by this engine build.
-#: Wrappers must match this exactly (unless allowProtocolSkew is set).
-PROTOCOL_VERSION: str = "0.1.0"
+# Re-export PROTOCOL_VERSION from the protocol package — the engine's wire
+# truth source — rather than restating it here, so the admin/version surface
+# can never drift from what `engine.py` and `modes/single_turn.py` actually
+# speak. (Prior to this, a hardcoded "0.1.0" survived the 0.2.0 protocol bump
+# and shipped a misleading `version --json` payload.)
+from amplifier_agent_lib.protocol import PROTOCOL_VERSION
+
+__all__ = ["PROTOCOL_VERSION", "version_command"]
 
 
 @click.command(name="version")

src/amplifier_agent_lib/__init__.py

@@ -10,5 +10,19 @@
 
 from __future__ import annotations
 
-__version__ = "0.2.0"
+from importlib.metadata import PackageNotFoundError
+from importlib.metadata import version as _pkg_version
+
+try:
+    # Source of truth: the ``[project].version`` field in ``pyproject.toml``,
+    # surfaced via the installed distribution's metadata. Resolving at import
+    # time keeps the engine ``__version__`` aligned with the packaging version
+    # in editable, wheel, and uv-tool installs alike.
+    __version__ = _pkg_version("amplifier-agent")
+except PackageNotFoundError:  # pragma: no cover - source tree w/o dist-info
+    # Fallback for the rare case where the package is on PYTHONPATH but not
+    # installed (e.g. an in-tree script run before ``uv sync``). Keep this
+    # string in sync with ``pyproject.toml`` if it ever has to fire.
+    __version__ = "0.3.0"
+
 __all__ = ["__version__"]

tests/test_cli_version_subcommand.py

@@ -2,7 +2,11 @@
 
 TDD bullets (11a):
 - `cli version --json` exits 0 with JSON payload containing {protocolVersion, version}
-- `cli version` (plain) outputs readable string containing '0.1.0'
+- `cli version` (plain) outputs readable string containing the wire protocol version
+
+The asserted protocol version is sourced from ``amplifier_agent_lib.protocol``
+(the wire truth source) so this test moves in lockstep with the engine when
+the protocol semver is bumped.
 """
 
 from __future__ import annotations
@@ -12,6 +16,7 @@
 from click.testing import CliRunner
 
 from amplifier_agent_cli.__main__ import cli
+from amplifier_agent_lib.protocol import PROTOCOL_VERSION
 
 
 def test_version_json_exits_zero_with_payload() -> None:
@@ -22,15 +27,17 @@ def test_version_json_exits_zero_with_payload() -> None:
     payload = json.loads(result.output.strip())
     assert "protocolVersion" in payload, f"protocolVersion missing from {payload}"
     assert "version" in payload, f"version missing from {payload}"
-    assert payload["protocolVersion"] == "0.1.0", f"Expected '0.1.0', got {payload['protocolVersion']!r}"
+    assert payload["protocolVersion"] == PROTOCOL_VERSION, (
+        f"Expected {PROTOCOL_VERSION!r}, got {payload['protocolVersion']!r}"
+    )
     assert isinstance(payload["version"], str) and len(payload["version"]) > 0, (
         f"Expected non-empty version string, got {payload['version']!r}"
     )
 
 
 def test_version_plain_outputs_protocol_version() -> None:
-    """cli version (plain, no --json) outputs '0.1.0' in stdout."""
+    """cli version (plain, no --json) outputs the current wire protocol version in stdout."""
     runner = CliRunner()
     result = runner.invoke(cli, ["version"])
     assert result.exit_code == 0, f"Expected exit 0, got {result.exit_code}. Output: {result.output}"
-    assert "0.1.0" in result.output, f"Expected '0.1.0' in output, got: {result.output!r}"
+    assert PROTOCOL_VERSION in result.output, f"Expected {PROTOCOL_VERSION!r} in output, got: {result.output!r}"

tests/test_protocol_methods.py

@@ -6,12 +6,12 @@
 
 
 def test_protocol_version_constant() -> None:
-    """PROTOCOL_VERSION is a non-empty string equal to '0.1.0'."""
+    """PROTOCOL_VERSION is a non-empty string equal to '0.2.0'."""
     from amplifier_agent_lib.protocol.methods import PROTOCOL_VERSION
 
     assert isinstance(PROTOCOL_VERSION, str)
     assert PROTOCOL_VERSION != ""
-    assert PROTOCOL_VERSION == "0.1.0"
+    assert PROTOCOL_VERSION == "0.2.0"
 
 
 def test_initialize_params_json_roundtrip() -> None:

tests/test_protocol_version_bump.py

@@ -1,10 +1,10 @@
-"""Test PROTOCOL_VERSION is bumped to 0.1.0 (A1)."""
+"""Test PROTOCOL_VERSION is bumped to 0.2.0 (path-based MCP config delivery)."""
 
 from __future__ import annotations
 
 
-def test_protocol_version_is_0_1_0() -> None:
-    """PROTOCOL_VERSION must be '0.1.0' per design §4.10.3 (A1)."""
+def test_protocol_version_is_0_2_0() -> None:
+    """PROTOCOL_VERSION must be '0.2.0' per the path-based MCP config bump (commit ea51d05)."""
     from amplifier_agent_lib.protocol.methods import PROTOCOL_VERSION
 
-    assert PROTOCOL_VERSION == "0.1.0"
+    assert PROTOCOL_VERSION == "0.2.0"