fix: use repository name for workspace mount target

WORKSPACE_NAME was computed from os.path.basename(repo_path), so when a
workspace path ended in a directory like 'main', the container mount target
became /home/user/main instead of /home/user/{repo-name}.

- Use GitRepository.name for WORKSPACE_NAME/REPO_NAME in manifest and
  legacy dockerfile flows
- Add unit test verifying prepare_manifest_instance uses repo.name even
  when the workspace path basename differs

Quality gates:
- pytest tests/unit: 213 passed
- ruff: clean on changed files
- mypy: clean on changed files

apps/api/tests/.pi-map.index.md

@@ -2,7 +2,7 @@
 dir: apps/api/tests
 
 ## role
-Shared test infrastructure and fixtures for the API application's test suite.
+Provides shared testing infrastructure and fixtures for the API application's test suite.
 ## parent
 index: apps/api/.pi-map.index.md
 map: apps/api/.pi-map.md

apps/api/tests/.pi-map.md

@@ -4,11 +4,11 @@ dir: apps/api/tests
 index: apps/api/tests/.pi-map.index.md
 
 ## role
-Shared test infrastructure and fixtures for the API application's test suite.
+Provides shared testing infrastructure and fixtures for the API application's test suite.
 ## files
 - conftest.py | Provides shared pytest fixtures for testing a FastAPI application with async SQLite database, authenticated clients, and test data setup. | exp: func:test_client() → Generator[TestClient, None, None], call:create_async_engine, call:engine.begin, call:conn.run_sync, call:asyncio.run, call:init_db, call:async_sessionmaker, call:patch, call:TestClient, call:app.dependency_overrides.pop, call:engine.dispose, func:init_db(), call:engine.begin, call:conn.run_sync, func:override_get_db_session() → AsyncGenerator[AsyncSession, None], call:async_sessionmaker, func:db_session(test_client) → AsyncGenerator[AsyncSession, None], call:app.dependency_overrides.get, call:override_fn, call:gen.asend, call:gen.aclose, call:create_async_engine, call:engine.begin, call:conn.run_sync, call:async_sessionmaker, call:engine.dispose, func:authenticated_client(test_client) → Generator[TestClient, None, None], call:str, call:uuid.uuid4, call:Settings, call:app.dependency_overrides.get, call:override_fn, call:gen.asend, call:User, call:uuid.UUID, call:session.add, call:session.commit, call:gen.aclose, call:asyncio.run, call:create_test_user, call:create_session_cookie, call:test_client.cookies.set, func:create_test_user(), call:app.dependency_overrides.get, call:override_fn, call:gen.asend, call:User, call:uuid.UUID, call:session.add, call:session.commit, call:gen.aclose, func:test_project_and_repo(authenticated_client) → tuple[str, str], call:uuid.uuid4, call:Settings, call:authenticated_client.cookies.get, call:decode_session_cookie, call:uuid.UUID, call:asyncio.run, call:get_user_id, call:app.dependency_overrides.get, call:override_fn, call:gen.asend, call:Project, call:session.add, call:GitRepository, call:session.commit, call:gen.aclose, call:create_project_and_repo, call:str, raise:RuntimeError, func:get_user_id(), call:Settings, call:authenticated_client.cookies.get, call:decode_session_cookie, call:uuid.UUID, func:create_project_and_repo(), call:app.dependency_overrides.get, call:override_fn, call:gen.asend, call:Project, call:session.add, call:GitRepository, call:session.commit, call:gen.aclose, func:admin_client(test_client) → Generator[TestClient, None, None], call:str, call:uuid.uuid4, call:Settings, call:app.dependency_overrides.get, call:override_fn, call:gen.asend, call:User, call:uuid.UUID, call:session.add, call:session.commit, call:gen.aclose, call:asyncio.run, call:create_admin_user, call:create_session_cookie, call:test_client.cookies.set, func:create_admin_user(), call:app.dependency_overrides.get, call:override_fn, call:gen.asend, call:User, call:uuid.UUID, call:session.add, call:session.commit, call:gen.aclose | dep: asyncio, os, typing, unittest.mock, pytest, pytest_asyncio, fastapi.testclient, sqlalchemy.ext.asyncio, src.config, src.models.base, src.main, src.auth.dependencies, uuid, src.auth.session, src.models.user.user, src.models.project.project, src.models.project.git_repository, fastapi, sqlalchemy, aiosqlite, src.models, src.auth
 ## arch
-Pytest plugin architecture with dependency-injected fixtures providing async database sessions, authenticated HTTP clients, and reusable test data factories.
+Pytest fixture-based testing architecture with async SQLite test database, dependency injection overrides for authentication, and modular helper utilities for common test scenarios.
 ## tags
 call:app.dependency, call:create, overrides.get, call:override, fn, call:gen.asend, call:gen.aclose, user
 ## symbols

apps/api/tests/unit/.pi-map.index.md

@@ -2,7 +2,7 @@
 dir: apps/api/tests/unit
 
 ## role
-Unit test suite for the API application, covering database migrations, configuration, Docker services, Git operations, event handling, file management, health monitoring, manifest compilation, notifications, and SSH key management.
+Unit test suite for the API application, covering database migrations, configuration, Docker services, Git operations, file handling, health monitoring, manifest compilation, and notification systems.
 ## parent
 index: apps/api/tests/.pi-map.index.md
 map: apps/api/tests/.pi-map.md

apps/api/tests/unit/.pi-map.md

@@ -4,7 +4,7 @@ dir: apps/api/tests/unit
 index: apps/api/tests/unit/.pi-map.index.md
 
 ## role
-Unit test suite for the API application, covering database migrations, configuration, Docker services, Git operations, event handling, file management, health monitoring, manifest compilation, notifications, and SSH key management.
+Unit test suite for the API application, covering database migrations, configuration, Docker services, Git operations, file handling, health monitoring, manifest compilation, and notification systems.
 ## files
 - __init__.py | Empty file with no functionality
 - test_alembic_migrations.py | Unit tests that verify Alembic database migrations are importable, have correct revision identifiers, and declare expected dependencies without requiring a live database. | exp: func:test_home_directory_migration_imports_and_rewrites() → None, call:Path, call:migration_path.exists, call:importlib.util.spec_from_file_location, call:importlib.util.module_from_spec, call:spec.loader.exec_module, call:callable, func:test_merge_migration_resolves_heads() → None, call:Path, call:migration_path.exists, call:importlib.util.spec_from_file_location, call:importlib.util.module_from_spec, call:spec.loader.exec_module, call:callable | dep: importlib.util, pathlib, pytest, importlib
@@ -19,7 +19,7 @@ Unit test suite for the API application, covering database migrations, configura
 - test_git_url_parser.py | Tests for git URL parsing utilities that extract base repository URLs, validate clone URLs, and parse various git URL formats across GitHub, GitLab, and Bitbucket. | exp: class:TestExtractBaseRepoUrl, method:test_github_tree_url(self), call:extract_base_repo_url, method:test_github_blob_url(self), call:extract_base_repo_url, method:test_github_pull_url(self), call:extract_base_repo_url, method:test_github_issues_url(self), call:extract_base_repo_url, method:test_github_valid_url(self), call:extract_base_repo_url, method:test_github_url_with_query_params(self), call:extract_base_repo_url, method:test_gitlab_tree_url(self), call:extract_base_repo_url, method:test_gitlab_blob_url(self), call:extract_base_repo_url, method:test_gitlab_merge_request_url(self), call:extract_base_repo_url, method:test_gitlab_valid_url(self), call:extract_base_repo_url, method:test_bitbucket_src_url(self), call:extract_base_repo_url, method:test_bitbucket_valid_url(self), call:extract_base_repo_url, method:test_ssh_url(self), call:extract_base_repo_url, method:test_ssh_url_without_git_suffix(self), call:extract_base_repo_url, method:test_invalid_url(self), call:extract_base_repo_url, method:test_empty_url(self), call:extract_base_repo_url, class:TestIsValidCloneUrl, method:test_valid_ssh_url(self), call:is_valid_clone_url, method:test_valid_https_url(self), call:is_valid_clone_url, method:test_browser_url(self), call:is_valid_clone_url, method:test_url_without_git_suffix(self), call:is_valid_clone_url, method:test_invalid_url(self), call:is_valid_clone_url, class:TestParseGitUrl, method:test_valid_git_url(self), call:parse_git_url, method:test_browser_url(self), call:parse_git_url, method:test_invalid_url(self), call:parse_git_url, method:test_empty_url(self), call:parse_git_url, method:test_ssh_url(self), call:parse_git_url | dep: src.utils.git_url_parser, pytest
 - test_health_monitor.py | Unit tests for HealthMonitor state-transition logic covering container crash detection, tunnel failure detection, recovery detection, write deduplication, exception resilience, and start/stop lifecycle. | exp: func:event_bus() → InstanceEventBus, call:InstanceEventBus, call:bus._reset_for_testing, func:health_monitor(event_bus: InstanceEventBus) → HealthMonitor, call:HealthMonitor, func:_create_running_instance(db_session) → ToolInstance, call:User, call:uuid.uuid4, call:db_session.add, call:db_session.commit, call:ToolInstance, func:test_detects_container_crash(db_session, event_bus: InstanceEventBus, health_monitor: HealthMonitor) → None, call:_create_running_instance, call:events_captured.append, call:event_bus.subscribe, call:patch, call:health_monitor._check_instance, call:db_session.refresh, call:len, call:db_session.execute, call:select(HealthCheck).where, call:result.scalar_one, func:capture_event(payload: InstanceEventPayload) → None, call:events_captured.append, func:test_detects_tunnel_failure(db_session, event_bus: InstanceEventBus, health_monitor: HealthMonitor) → None, call:_create_running_instance, call:events_captured.append, call:event_bus.subscribe, call:patch, call:health_monitor._check_instance, call:db_session.refresh, call:len, call:db_session.execute, call:select(HealthCheck).where, call:result.scalar_one, func:capture_event(payload: InstanceEventPayload) → None, call:events_captured.append, func:test_detects_recovery(db_session, event_bus: InstanceEventBus, health_monitor: HealthMonitor) → None, call:_create_running_instance, call:db_session.commit, call:HealthSnapshot, call:events_captured.append, call:event_bus.subscribe, call:patch, call:health_monitor._check_instance, call:db_session.refresh, call:len, call:db_session.execute, call:select(HealthCheck).where, call:result.scalar_one, func:capture_event(payload: InstanceEventPayload) → None, call:events_captured.append, func:test_skips_writes_when_no_state_change(db_session, event_bus: InstanceEventBus, health_monitor: HealthMonitor) → None, call:_create_running_instance, call:HealthSnapshot, call:patch, call:health_monitor._check_instance, call:db_session.execute, call:select(HealthCheck).where, call:len, call:result.scalars().all, func:test_docker_exception_resilience(db_session, event_bus: InstanceEventBus, health_monitor: HealthMonitor) → None, call:_create_running_instance, call:events_captured.append, call:event_bus.subscribe, call:patch, call:RuntimeError, call:health_monitor._check_instance, call:db_session.execute, call:select(HealthCheck).where, call:result.scalar_one_or_none, func:capture_event(payload: InstanceEventPayload) → None, call:events_captured.append, func:test_monitor_start_stop(health_monitor: HealthMonitor) → None, call:health_monitor.start, call:task.done, call:health_monitor.stop, call:suppress, call:task.cancelled | dep: asyncio, uuid, contextlib, unittest.mock, pytest, sqlalchemy, src.models.system.health_check, src.models.tool.tool_instance, src.models.user.user, src.services.instance.event_bus, src.services.instance.health_monitor
 - test_home_path_expansion.py | Unit tests for home directory path expansion (~ and $HOME) in container paths and manifest home directory resolution. | exp: class:TestExpandContainerPath, method:test_tilde_slash_expands(self) → None, call:expand_container_path, method:test_tilde_alone_expands(self) → None, call:expand_container_path, method:test_dollar_home_slash_expands(self) → None, call:expand_container_path, method:test_dollar_home_alone_expands(self) → None, call:expand_container_path, method:test_absolute_path_unchanged(self) → None, call:expand_container_path, method:test_relative_path_unchanged(self) → None, call:expand_container_path, method:test_tilde_in_middle_unchanged(self) → None, call:expand_container_path, method:test_dollar_home_in_middle_unchanged(self) → None, call:expand_container_path, method:test_root_home(self) → None, call:expand_container_path, class:TestGetManifestHomeDir, method:test_with_user_block(self) → None, call:get_manifest_home_dir, method:test_without_user_block(self) → None, call:get_manifest_home_dir, method:test_with_empty_user_name(self) → None, call:get_manifest_home_dir, method:test_with_none_user_name(self) → None, call:get_manifest_home_dir | dep: pytest, src.services.config.config_profile_resolver, src.services.build.manifest_compiler
-- test_instance_service.py | Unit tests for home directory expansion in docker-compose file modification via instance_service | exp: class:TestModifyComposeFile, method:test_extra_volumes_expand_home_dir(self, tmp_path), call:compose_path.write_text, call:modify_compose_file, call:str, call:compose_path.read_text, method:test_working_directory_expands_home_dir(self, tmp_path), call:compose_path.write_text, call:modify_compose_file, call:str, call:compose_path.read_text | dep: pytest, src.services.tool.instance_service
+- test_instance_service.py | Unit tests for tool instance service functions that modify docker-compose files and prepare manifest instances with home directory expansion and workspace name resolution. | exp: class:TestModifyComposeFile, method:test_extra_volumes_expand_home_dir(self, tmp_path), call:compose_path.write_text, call:modify_compose_file, call:str, call:compose_path.read_text, method:test_working_directory_expands_home_dir(self, tmp_path), call:compose_path.write_text, call:modify_compose_file, call:str, call:compose_path.read_text, class:Result, func:test_prepare_manifest_instance_uses_repo_name_not_workspace_dir(), call:MagicMock, call:AsyncMock, call:Result, call:prepare_manifest_instance, func:session_get(model, obj_id), func:fake_run(cmd), call:Result | dep: unittest.mock, pytest, src.services.tool.instance_service, subprocess, src.services.tool
 - test_lifecycle_hooks.py | Unit tests for lifecycle hook helper functions that derive notification titles and determine whether events should trigger notifications. | exp: class:TestDeriveTitle, method:test_known_event_types(self) → None, call:_derive_title, method:test_unknown_event_type(self) → None, call:_derive_title, class:TestShouldNotify, method:test_error_events_are_notified(self) → None, call:_should_notify, method:test_health_changed_running_is_notified(self) → None, call:_should_notify, method:test_created_started_stopped_restarted_deleted_filtered(self) → None, call:_should_notify, method:test_health_changed_non_running_filtered(self) → None, call:_should_notify | dep: pytest, src.services.instance.lifecycle_hooks
 - test_manifest_compiler.py | Unit tests for a manifest compiler that generates Dockerfiles, docker-compose files, and entrypoint scripts from manifest configurations. | exp: class:TestGetManifestHomeDir, method:test_home_directory_in_manifest_wins(self) → None, call:get_manifest_home_dir, method:test_user_name_derives_home(self) → None, call:get_manifest_home_dir, method:test_root_fallback(self) → None, call:get_manifest_home_dir, method:test_empty_home_directory_falls_back(self) → None, call:get_manifest_home_dir, class:TestCompileDockerfileHomeDirectory, method:test_env_home_and_workdir_use_home_directory(self) → None, call:compile_dockerfile, method:test_workspace_symlink_created(self) → None, call:compile_dockerfile, method:test_runtime_workspace_not_baked_into_image(self) → None, call:compile_dockerfile, method:test_runtime_working_dir_overrides_home_workdir(self) → None, call:compile_dockerfile, method:test_working_dir_expands_tilde(self) → None, call:compile_dockerfile, class:TestCompileComposeHomeDirectory, method:test_default_repo_mount_synthesized(self) → None, call:compile_compose, method:test_explicit_repo_mount_preserved(self) → None, call:compile_compose, method:test_workspace_name_substituted_in_mount_target(self) → None, call:compile_compose, method:test_working_dir_expands_home(self) → None, call:compile_compose, class:TestCompileEntrypoint, method:test_entrypoint_creates_home_and_workspace(self) → None, call:compile_entrypoint, method:test_entrypoint_removes_stale_placeholder_directory(self) → None, call:compile_entrypoint, method:test_entrypoint_uses_root_then_sudo_for_workspace_symlink(self) → None, call:compile_entrypoint, call:entrypoint.find, method:test_entrypoint_fixes_mount_owners(self) → None, call:compile_entrypoint, func:test_compile_dockerfile_creates_config_dirs_for_user() → None, call:compile_dockerfile, func:test_compile_dockerfile_no_user_does_not_create_home() → None, call:compile_dockerfile, func:test_compile_dockerfile_uses_user_npm_prefix() → None, call:compile_dockerfile, func:test_compile_dockerfile_starts_as_root_and_drops_privileges() → None, call:compile_dockerfile, call:compile_entrypoint, func:test_compile_compose_runs_as_root() → None, call:compile_compose | dep: pytest, src.services.build.manifest_compiler
 - test_migration_metadata.py | Tests Alembic database migration files for correct table definitions and revision chain metadata | exp: func:test_initial_migration_defines_all_core_tables() → None, call:Path(__file__).resolve, call:spec_from_file_location, call:module_from_spec, call:spec.loader.exec_module, func:test_refresh_tokens_migration_has_expected_revision_chain() → None, call:Path(__file__).resolve, call:spec_from_file_location, call:module_from_spec, call:spec.loader.exec_module | dep: pytest, importlib.util, pathlib, pathlib.Path
@@ -30,7 +30,7 @@ Unit test suite for the API application, covering database migrations, configura
 - test_readiness_probe.py | Unit tests for a Docker container readiness probe service that executes commands via docker exec with retry logic. | exp: class:TestExecuteProbe, class:TestIntegrationScenarios | dep: unittest.mock, src.services.shared.readiness_probe, subprocess
 - test_ssh_keys.py | Unit tests for SSH key preparation functionality including file creation, permissions, ownership, and error handling | exp: class:TestPrepareSshKeyFiles | dep: os, pathlib, unittest.mock, pytest, src.services.shared.ssh_keys
 ## arch
-Standard Python unittest/pytest pattern with heavy use of mocking for external dependencies (Docker, Git, subprocess, database) to enable fast, isolated tests without requiring live infrastructure.
+Standard Python unittest/pytest layout with test modules mirroring production code structure, using mocking for external dependencies (Docker, Git, subprocess, database) and parameterized tests for URL parsing and edge cases.
 ## tags
 test, url, call:notification, git, home, call:, merge, call:db
 ## symbols

apps/api/tests/unit/test_instance_service.py

@@ -1,8 +1,10 @@
 """Unit tests for the tool instance service."""
 
+from unittest.mock import MagicMock, AsyncMock
+
 import pytest
 
-from src.services.tool.instance_service import modify_compose_file
+from src.services.tool.instance_service import modify_compose_file, prepare_manifest_instance
 
 
 @pytest.mark.unit
@@ -42,3 +44,77 @@ class TestModifyComposeFile:
 
         content = compose_path.read_text()
         assert "working_dir: /home/user/workspace" in content
+
+
+@pytest.mark.unit
+async def test_prepare_manifest_instance_uses_repo_name_not_workspace_dir():
+    """WORKSPACE_NAME must be the repository name, not the workspace path basename."""
+    repo = MagicMock()
+    repo.name = "my-cool-repo"
+    repo.path = "/data/repos/main"
+
+    tool_type = MagicMock()
+    tool_type.name = "pi-agent"
+    tool_type.manifest_id = "manifest-uuid"
+
+    manifest_def = MagicMock()
+    manifest_def.id = "manifest-uuid"
+    manifest_def.manifest = {
+        "base_image": "ubuntu:24.04",
+        "interface_type": "terminal",
+        "user": {"name": "user", "uid": 1001, "gid": 1001},
+        "mounts": [{"name": "workspace", "target": "~/{{WORKSPACE_NAME}}", "source_type": "repo"}],
+    }
+    manifest_def.base_definition_id = None
+
+    instance = MagicMock()
+    instance.id = "instance-uuid"
+    instance.name = "pi-agent-my-cool-repo-abc123"
+    instance.repository_id = "repo-uuid"
+    instance.tool_type_id = "tooltype-uuid"
+    instance.port = 0
+    instance.selected_config_profile_id = None
+    instance.workspace_id = None
+
+    session = AsyncMock()
+
+    async def session_get(model, obj_id):
+        if model.__name__ == "ToolType":
+            return tool_type
+        if model.__name__ == "ToolDefinitionManifest":
+            return manifest_def
+        if model.__name__ == "GitRepository":
+            return repo
+        return None
+
+    session.get.side_effect = session_get
+
+    # Patch docker images check to report the image already exists so we skip
+    # the actual Docker build.
+    import subprocess
+    from src.services.tool import instance_service
+
+    original_run = subprocess.run
+    def fake_run(cmd, **kwargs):
+        class Result:
+            returncode = 0
+            stdout = "image-id"
+            stderr = ""
+        return Result()
+
+    instance_service.subprocess.run = fake_run
+    try:
+        image_tag, compose_content, manifest, home_dir = await prepare_manifest_instance(
+            session=session,
+            instance=instance,
+            instance_dir="/tmp/instance",
+            repo_path="/data/repos/main",
+            env_vars={},
+            extra_volumes=[],
+            working_directory=None,
+        )
+    finally:
+        instance_service.subprocess.run = original_run
+
+    assert "WORKSPACE_NAME: my-cool-repo" in compose_content
+    assert "/data/repos/main:/home/user/my-cool-repo" in compose_content