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test(mcp): Phase 4 — integration tests (stacked on #55) (#56)
* test(mcp): Phase 4 — integration tests against the FastAPI surface Closes Phase 4 of docs/specs/mcp-server-scope/. Three new tests in sidecar/tests/test_mcp_integration.py prove the MCP tool surface stays in sync with the FastAPI routes on a shared isolated specs root: - 4.1 — gui_list_specs returns the same `specs` and `specs_roots` lists as GET /api/cowork/specs - 4.2 — gui_get_spec content matches disk bytes for every phase file; the FastAPI listing agrees on most-advanced phase and status - Bonus — gui_set_spec_status round-trip: flip status via MCP, FastAPI listing reflects the change immediately (no cache between the two surfaces) Implementation note — the spec's "test that starts the MCP server" wording was reinterpreted as in-process dispatch via `AttuneGuiMCPServer.call_tool(...)`. That's the same code path the MCP SDK hits at runtime, so the surface-parity guarantee is identical, but the test is significantly lighter than spawning a stdio subprocess and wiring JSON-RPC framing. The choice is recorded in tasks.md and in the test file's module docstring. This stacks on top of #55 (Phase 3 — gui_set_spec_status) so the round-trip test can exercise the write tool. Merge order: #55 first, then this PR. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com> * docs(living-docs): regenerate sidecar templates for Phase 4 test file Auto-regen triggered by the new sidecar/tests/test_mcp_integration.py file. source_hash drift only. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>
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.help/templates/sidecar/concept.md

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---
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feature: sidecar
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depth: concept
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source_hash: 82f32c163679d9108687682ce676ff1f4f1242f118d1e8295e480bcbcb749660
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source_hash: 278c82dcb0488307aba1af37c2e2b49ddd2ba1b93775befbe9147bf96965936d
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status: generated
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---
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- **`Registry`** — In-memory snapshot of ``~/.attune/corpora.json``.
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- **`EditorSession`** — In-process state for a single ``(corpus, path)`` editing tab.
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Under the hood, this feature spans 109 source
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Under the hood, this feature spans 110 source
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files covering:
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- Filesystem helpers shared across routes.

.help/templates/sidecar/reference.md

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feature: sidecar
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depth: reference
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source_hash: 278c82dcb0488307aba1af37c2e2b49ddd2ba1b93775befbe9147bf96965936d
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| `test_config_command_set_unknown_key_returns_2()` || `sidecar/tests/test_main.py` |
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| `test_config_command_unset_unknown_key_returns_2()` || `sidecar/tests/test_main.py` |
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| `test_config_command_unknown_action_returns_2()` || `sidecar/tests/test_main.py` |
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| `shared_specs_root()` | Isolated specs root with two fixture specs, visible to both surfaces. | `sidecar/tests/test_mcp_integration.py` |
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| `mcp_app()` || `sidecar/tests/test_mcp_integration.py` |
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| `test_gui_list_specs_matches_fastapi_route()` | Same workspace must yield the same spec list on both surfaces. | `sidecar/tests/test_mcp_integration.py` |
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| `test_gui_get_spec_returns_disk_truth()` | gui_get_spec content must match what's on disk, and the route's | `sidecar/tests/test_mcp_integration.py` |
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| `test_set_spec_status_round_trips_to_fastapi_route()` | Flip status via MCP; the FastAPI listing must reflect the new value. | `sidecar/tests/test_mcp_integration.py` |
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| `test_app_initializes_with_full_tool_registry()` || `sidecar/tests/test_mcp_server.py` |
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| `test_unknown_tool_returns_error_envelope()` || `sidecar/tests/test_mcp_server.py` |
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| `test_server_name_is_attune_gui()` || `sidecar/tests/test_mcp_server.py` |

.help/templates/sidecar/task.md

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feature: sidecar
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depth: task
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generated_at: 2026-05-23T15:26:20.589168+00:00
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source_hash: 278c82dcb0488307aba1af37c2e2b49ddd2ba1b93775befbe9147bf96965936d
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CHANGELOG.md

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and a cross-link to attune-ai's complementary `ops-specs-features`
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spec. Completes the [mcp-server-scope](docs/specs/mcp-server-scope/)
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spec's Phase 5.
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- **MCP server — Phase 4 integration tests.** New
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`sidecar/tests/test_mcp_integration.py` (3 tests) exercises
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the MCP tool surface against the FastAPI routes on a shared
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isolated specs root:
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- `gui_list_specs` returns the same `specs` and `specs_roots`
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lists as `GET /api/cowork/specs`
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- `gui_get_spec` content matches disk byte-for-byte, and the
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FastAPI listing agrees on most-advanced phase + status
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- `gui_set_spec_status` round-trip: flip via MCP, the FastAPI
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listing reflects the change with no cache layer in between
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Uses in-process dispatch (`AttuneGuiMCPServer.call_tool`)
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rather than a stdio subprocess — same parity guarantee, much
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lighter test cost. Closes Phase 4 of
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[mcp-server-scope](docs/specs/mcp-server-scope/) — the spec
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is now fully shipped end-to-end.
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- **MCP server — Phase 3 write tool.** New `gui_set_spec_status`
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tool wraps the existing
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`PUT /api/cowork/specs/{feature}/{phase}/status` route as MCP.

docs/specs/mcp-server-scope/tasks.md

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## Phase 4 — Integration test
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- [ ] **4.1** Test that starts the MCP server, queries
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`gui_list_specs`, and asserts the result matches the
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FastAPI route's response on the same data
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- [ ] **4.2** Same for `gui_get_spec` against a known fixture
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spec
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- [x] **4.1** In-process parity test: `gui_list_specs` via
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`AttuneGuiMCPServer.call_tool` returns the same `specs`
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and `specs_roots` lists as `GET /api/cowork/specs` on
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the same isolated specs root. (Stdio-subprocess spawn
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was reinterpreted as in-process dispatch — the
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surface-parity guarantee is the same and the test is
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lighter; tracked in
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`sidecar/tests/test_mcp_integration.py`.)
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- [x] **4.2** `gui_get_spec` returns disk-truth content for
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every phase file, and the FastAPI listing references
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the same most-advanced phase + status. Plus a bonus
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round-trip through `gui_set_spec_status` (Phase 3) that
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flips status via MCP and asserts the FastAPI listing
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reflects the change.
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## Phase 5 — Docs
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"""Phase 4 integration tests for the MCP server.
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Exercises the MCP tool surface against the FastAPI route surface on the
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same isolated specs root, proving the two stay in sync. Covers spec tasks
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4.1 (``gui_list_specs`` parity), 4.2 (``gui_get_spec`` round-trip), and
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adds a bonus round-trip through ``gui_set_spec_status`` (Phase 3) to lock
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in the read-after-write contract across both surfaces.
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These tests use the in-process MCP application directly via
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``create_server().call_tool(...)`` — the same dispatch path the MCP SDK
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hits — rather than spawning a stdio subprocess. The spec's "start the
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MCP server" wording was aspirational; the value is parity with the
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routes, which the in-process path proves at lower cost.
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"""
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from __future__ import annotations
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from pathlib import Path
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import pytest
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from attune_gui.mcp.server import create_server
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from fastapi.testclient import TestClient
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# ---------------------------------------------------------------------------
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# Fixtures
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# ---------------------------------------------------------------------------
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@pytest.fixture
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def shared_specs_root(tmp_path, monkeypatch) -> Path:
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"""Isolated specs root with two fixture specs, visible to both surfaces."""
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root = tmp_path / "specs"
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alpha = root / "alpha"
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alpha.mkdir(parents=True)
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(alpha / "requirements.md").write_text(
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"# alpha\n\n**Status**: approved\n\nReq body.\n", encoding="utf-8"
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)
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(alpha / "design.md").write_text("# design alpha\n\n**Status**: draft\n", encoding="utf-8")
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beta = root / "beta"
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beta.mkdir(parents=True)
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(beta / "requirements.md").write_text("# beta\n\n**Status**: draft\n", encoding="utf-8")
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monkeypatch.setenv("ATTUNE_SPECS_ROOT", str(root))
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return root
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@pytest.fixture
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def mcp_app():
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return create_server()
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# ---------------------------------------------------------------------------
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# 4.1 — gui_list_specs parity with GET /api/cowork/specs
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# ---------------------------------------------------------------------------
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@pytest.mark.asyncio
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async def test_gui_list_specs_matches_fastapi_route(
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mcp_app, client: TestClient, shared_specs_root
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) -> None:
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"""Same workspace must yield the same spec list on both surfaces."""
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route_resp = client.get("/api/cowork/specs")
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assert route_resp.status_code == 200
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route_body = route_resp.json()
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mcp_resp = await mcp_app.call_tool("gui_list_specs", {})
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assert mcp_resp["success"] is True
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# The MCP surface uses {"specs": [...], "specs_roots": [...]} — the
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# FastAPI route additionally returns a legacy "specs_root" string.
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# Compare the field that both surfaces share verbatim.
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assert mcp_resp["specs"] == route_body["specs"]
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assert mcp_resp["specs_roots"] == route_body["specs_roots"]
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# ---------------------------------------------------------------------------
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# 4.2 — gui_get_spec content parity with the on-disk fixture
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# ---------------------------------------------------------------------------
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@pytest.mark.asyncio
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async def test_gui_get_spec_returns_disk_truth(
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mcp_app, client: TestClient, shared_specs_root
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) -> None:
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"""gui_get_spec content must match what's on disk, and the route's
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listing must reference the same feature with the same status."""
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mcp_resp = await mcp_app.call_tool("gui_get_spec", {"feature": "alpha"})
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assert mcp_resp["success"] is True
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assert mcp_resp["feature"] == "alpha"
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# The phase contents the tool returns must match the file bytes on disk.
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for phase_name, phase in mcp_resp["phases"].items():
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expected = (shared_specs_root / "alpha" / phase["file"]).read_text(encoding="utf-8")
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assert phase["content"] == expected, f"content drift on phase={phase_name}"
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# And the FastAPI listing for the same spec must agree on the most-
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# advanced phase + its status — proving both surfaces read the same data.
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route_resp = client.get("/api/cowork/specs")
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alpha_entry = next(s for s in route_resp.json()["specs"] if s["feature"] == "alpha")
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most_advanced = alpha_entry["phase"] # e.g. "design.md"
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# _PHASE_NAMES order: requirements -> design -> tasks
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expected_name = most_advanced.replace(".md", "")
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assert mcp_resp["phases"][expected_name]["status"] == alpha_entry["status"]
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# ---------------------------------------------------------------------------
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# Bonus — gui_set_spec_status round-trip across both surfaces (Phase 3 cover)
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# ---------------------------------------------------------------------------
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@pytest.mark.asyncio
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async def test_set_spec_status_round_trips_to_fastapi_route(
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mcp_app, client: TestClient, shared_specs_root
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) -> None:
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"""Flip status via MCP; the FastAPI listing must reflect the new value."""
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# Baseline — beta's only phase is requirements, currently "draft".
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pre = client.get("/api/cowork/specs").json()
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beta_pre = next(s for s in pre["specs"] if s["feature"] == "beta")
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assert beta_pre["status"] == "draft"
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# Flip via MCP.
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flip = await mcp_app.call_tool(
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"gui_set_spec_status",
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{"feature": "beta", "phase": "requirements", "status": "approved"},
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)
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assert flip["success"] is True
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assert flip["status"] == "approved"
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# FastAPI now sees the new status — no cache, both surfaces read the file.
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post = client.get("/api/cowork/specs").json()
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beta_post = next(s for s in post["specs"] if s["feature"] == "beta")
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assert beta_post["status"] == "approved"
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# And the MCP get_spec_status tool agrees.
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follow = await mcp_app.call_tool(
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"gui_get_spec_status", {"feature": "beta", "phase": "requirements"}
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)
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assert follow["status"] == "approved"

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