fix: remove explicit repo mount from pi-agent manifest and derive workspace name from remote URL

The pi-agent manifest still declared an explicit repo mount with
{{WORKSPACE_NAME}}, making the mount target dependent on tool config. The
instance service now synthesizes the repo mount, so the manifest no longer
needs the explicit mount.

- Add Alembic migration 2026_06_15_090500 to remove the source_type: repo
  mount from the built-in pi-agent manifest
- Add _get_repository_mount_name() helper to derive the workspace directory
  name from the repository remote URL (matching git clone behavior) and
  fall back to the user-provided repository name
- Use the helper for WORKSPACE_NAME/REPO_NAME in manifest, legacy dockerfile,
  and legacy compose template paths
- Update unit tests for the new migration and helper

Quality gates:
- pytest tests/unit: 218 passed
- ruff: clean on changed files
- mypy: clean on changed files
- alembic heads: single head

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

@@ -4,10 +4,10 @@ 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, file handling, health monitoring, manifest compilation, and notification systems.
+Comprehensive unit test suite for the API application covering database migrations, configuration, Docker operations, Git services, file management, 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
+- 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, func:test_remove_pi_agent_repo_mount_migration_imports() → 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
 - test_config.py | Tests configuration settings and database URL building for an application, verifying defaults, environment variable overrides, and environment-specific behavior. | exp: func:test_settings_default_database_url_uses_asyncpg(monkeypatch) → None, call:monkeypatch.delenv, call:Settings, func:test_build_database_url_uses_explicit_values() → None, call:build_database_url, func:test_settings_prefers_explicit_database_url_env(monkeypatch) → None, call:monkeypatch.setenv, call:Settings, func:test_auth_settings_have_secure_defaults() → None, call:Settings, call:settings.resolved_authentik_authorize_url.endswith, call:settings.resolved_authentik_token_url.endswith, call:settings.resolved_authentik_jwks_url.endswith, func:test_cookie_policy_is_strict_in_production(monkeypatch) → None, call:monkeypatch.setenv, call:Settings, func:test_cookie_policy_is_relaxed_for_local_dev(monkeypatch) → None, call:monkeypatch.setenv, call:Settings | dep: pytest, src.config, src.database
 - test_config_profile_resolver.py | Tests the config profile resolution system including merge helpers, profile inheritance with cycle detection, and git mount normalization | exp: class:TestMergeFunctions, method:test_merge_env_vars_basic(self) → None, call:_merge_env_vars, method:test_merge_env_vars_tracks_overrides(self) → None, call:_merge_env_vars, method:test_merge_runtime_hints_basic(self) → None, call:_merge_runtime_hints, method:test_merge_files_basic(self) → None, call:_merge_files, method:test_merge_mounts_basic(self) → None, call:_merge_mounts, method:test_merge_mounts_file_override(self) → None, call:_merge_mounts, call:ResolvedMount, method:test_merge_mounts_mode_conflict(self) → None, call:_merge_mounts, call:ResolvedMount, method:test_merge_git_mounts_basic(self) → None, call:_merge_git_mounts, call:len, method:test_merge_git_mounts_concatenate_same_repo_branch(self) → None, call:_merge_git_mounts, call:len, method:test_merge_git_mounts_dedup_same_mapping(self) → None, call:_merge_git_mounts, call:len, method:test_merge_git_mounts_different_repos(self) → None, call:_merge_git_mounts, call:len, method:test_merge_git_mounts_different_branches(self) → None, call:_merge_git_mounts, call:len, call:m.get, class:TestResolveProfile, class:TestApplyResolvedProfile, method:test_mounts_directory_not_individual_files(self, tmp_path) → None, call:ResolvedProfile, call:uuid.uuid4, call:ResolvedMount, call:apply_resolved_profile, call:str, call:len, call:Path(volumes[0]["source"]).is_dir, call:(Path(volumes[0]["source"]) / "config.json").exists, call:(Path(volumes[0]["source"]) / "nested" / "file.txt").exists, method:test_directory_mount_target(self, tmp_path) → None, call:ResolvedProfile, call:uuid.uuid4, call:ResolvedMount, call:apply_resolved_profile, call:str, call:len, call:Path, call:(Path(volumes[0]["source"]) / "z.json").exists, method:test_empty_mount_produces_no_volumes(self, tmp_path) → None, call:ResolvedProfile, call:uuid.uuid4, call:ResolvedMount, call:apply_resolved_profile, call:str, method:test_home_expansion_in_directory_mount_target(self, tmp_path) → None, call:ResolvedProfile, call:uuid.uuid4, call:ResolvedMount, call:apply_resolved_profile, call:str, call:len, call:(Path(volumes[0]["source"]) / "app.toml").exists, call:Path, method:test_readonly_mount_sets_readonly_flag(self, tmp_path) → None, call:ResolvedProfile, call:uuid.uuid4, call:ResolvedMount, call:apply_resolved_profile, call:str, call:len, call:volumes[0].get, method:test_writable_mount_does_not_set_readonly_flag(self, tmp_path) → None, call:ResolvedProfile, call:uuid.uuid4, call:ResolvedMount, call:apply_resolved_profile, call:str, call:len, call:volumes[0].get, class:TestCheckIncludeCycle | dep: uuid, pathlib, pytest, sqlalchemy.ext.asyncio, src.models.config.config_profile, src.services.config.config_profile_resolver
 - test_docker_build.py | Unit tests for a Docker image build service that verifies Dockerfile creation, command structure, context file handling, path traversal prevention, and error handling. | exp: class:TestBuildImage | dep: subprocess, tempfile, pathlib, unittest.mock, pytest, src.services.build.docker_build
@@ -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 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_instance_service.py | Unit tests for tool instance service functions including compose file modification, repository mount name resolution, and manifest instance preparation. | 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:TestGetRepositoryMountName, method:test_prefers_remote_url_name_over_user_provided_name(self), call:MagicMock, call:_get_repository_mount_name, method:test_parses_browser_url_to_repo_name(self), call:MagicMock, call:_get_repository_mount_name, method:test_falls_back_to_repo_name_when_remote_url_missing(self), call:MagicMock, call:_get_repository_mount_name, method:test_falls_back_to_repo_name_for_unparseable_url(self), call:MagicMock, call:_get_repository_mount_name, 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
@@ -30,9 +30,9 @@ 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 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.
+Standard Python unittest/pytest structure with heavy mocking of external dependencies (Docker, Git subprocess, database), organized by service/domain with tests isolating individual components without requiring live infrastructure.
 ## tags
-test, url, call:notification, git, home, call:, merge, call:db
+test, url, call:notification, git, call:, home, merge, call:db
 ## symbols
 - TestMergeFunctions
 - TestResolveProfile