refactor: remove legacy patterns system, unify on workflows

Remove the entire patterns domain model, IPC channels, sidecar services,
renderer components, and tests. Sessions now bind exclusively to workflows
via workflowId. Builtin workflows replace builtin patterns.

Backend:
- Make AgentNodeConfig standalone (no longer extends PatternAgentDefinition)
- Add WorkflowOrchestrationMode and WorkflowExecutionDefinition
- Create builtin workflows (single-agent, sequential, concurrent, handoff, group-chat)
- Rewrite session model config helpers for workflow-only
- Remove pattern IPC channels, handlers, and preload bindings
- Merge createSession/createWorkflowSession into single method
- Remove sidecar PatternGraphResolver, PatternValidator, pattern DTOs
- Add workspace migration for legacy sessions (patternId -> workflowId)

Frontend:
- Delete PatternEditor, pattern-graph components, patternGraph lib
- Delete NewSessionModal (session creation uses workflows directly)
- Remove PatternsSection from SettingsPanel
- Update App.tsx, ChatPane, ActivityPanel, Sidebar, RunTimeline,
  AgentConfigFields, InlinePills, sessionActivity to use workflow types
- Delete pattern.ts domain module

78 files changed across backend and frontend.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
This commit is contained in:
David Kaya
2026-04-06 22:37:00 +02:00
co-authored by Copilot
parent 69d0804161
commit 805e369b67
78 changed files with 2303 additions and 4441 deletions
@@ -23,7 +23,7 @@ public sealed class CopilotSessionHooksTests
],
};
SessionHooks hooks = CopilotSessionHooks.Create(command, command.Pattern.Agents[0], configuredHooks, runner);
SessionHooks hooks = CopilotSessionHooks.Create(command, command.Workflow.GetAgentNodes()[0], configuredHooks, runner);
PreToolUseHookOutput? decision = await hooks.OnPreToolUse!(
new PreToolUseHookInput
@@ -64,7 +64,7 @@ public sealed class CopilotSessionHooksTests
],
};
SessionHooks hooks = CopilotSessionHooks.Create(command, command.Pattern.Agents[0], configuredHooks, runner);
SessionHooks hooks = CopilotSessionHooks.Create(command, command.Workflow.GetAgentNodes()[0], configuredHooks, runner);
PreToolUseHookOutput? decision = await hooks.OnPreToolUse!(
new PreToolUseHookInput
@@ -93,7 +93,7 @@ public sealed class CopilotSessionHooksTests
],
};
SessionHooks hooks = CopilotSessionHooks.Create(command, command.Pattern.Agents[0], configuredHooks, runner);
SessionHooks hooks = CopilotSessionHooks.Create(command, command.Workflow.GetAgentNodes()[0], configuredHooks, runner);
PreToolUseHookOutput? decision = await hooks.OnPreToolUse!(
new PreToolUseHookInput
@@ -123,7 +123,7 @@ public sealed class CopilotSessionHooksTests
public async Task Create_PreToolUseAutoAllowsInternalOrchestrationTools(string toolName)
{
RunTurnCommandDto command = CreateCommandWithToolApproval();
SessionHooks hooks = CopilotSessionHooks.Create(command, command.Pattern.Agents[0], ResolvedHookSet.Empty, new RecordingHookCommandRunner());
SessionHooks hooks = CopilotSessionHooks.Create(command, command.Workflow.GetAgentNodes()[0], ResolvedHookSet.Empty, new RecordingHookCommandRunner());
PreToolUseHookOutput? decision = await hooks.OnPreToolUse!(
new PreToolUseHookInput
@@ -139,7 +139,7 @@ public sealed class CopilotSessionHooksTests
public async Task Create_PreToolUseKeepsStoreMemoryUnderApprovalPolicy()
{
RunTurnCommandDto command = CreateCommandWithToolApproval();
SessionHooks hooks = CopilotSessionHooks.Create(command, command.Pattern.Agents[0], ResolvedHookSet.Empty, new RecordingHookCommandRunner());
SessionHooks hooks = CopilotSessionHooks.Create(command, command.Workflow.GetAgentNodes()[0], ResolvedHookSet.Empty, new RecordingHookCommandRunner());
PreToolUseHookOutput? decision = await hooks.OnPreToolUse!(
new PreToolUseHookInput
@@ -159,7 +159,7 @@ public sealed class CopilotSessionHooksTests
public async Task Create_PreToolUseAutoAllowsWhenCategoryIsApproved(string toolName, string category)
{
RunTurnCommandDto command = CreateCommandWithAutoApprovedCategory(category);
SessionHooks hooks = CopilotSessionHooks.Create(command, command.Pattern.Agents[0], ResolvedHookSet.Empty, new RecordingHookCommandRunner());
SessionHooks hooks = CopilotSessionHooks.Create(command, command.Workflow.GetAgentNodes()[0], ResolvedHookSet.Empty, new RecordingHookCommandRunner());
PreToolUseHookOutput? decision = await hooks.OnPreToolUse!(
new PreToolUseHookInput
@@ -177,7 +177,7 @@ public sealed class CopilotSessionHooksTests
RunTurnCommandDto command = CreateCommandWithConfiguredMcpServers(
["icm-mcp"],
["mcp_server:icm-mcp"]);
SessionHooks hooks = CopilotSessionHooks.Create(command, command.Pattern.Agents[0], ResolvedHookSet.Empty, new RecordingHookCommandRunner());
SessionHooks hooks = CopilotSessionHooks.Create(command, command.Workflow.GetAgentNodes()[0], ResolvedHookSet.Empty, new RecordingHookCommandRunner());
PreToolUseHookOutput? decision = await hooks.OnPreToolUse!(
new PreToolUseHookInput
@@ -193,7 +193,7 @@ public sealed class CopilotSessionHooksTests
public async Task Create_PreToolUseRequiresApprovalWhenMcpServerIsNotApproved()
{
RunTurnCommandDto command = CreateCommandWithConfiguredMcpServers(["icm-mcp"]);
SessionHooks hooks = CopilotSessionHooks.Create(command, command.Pattern.Agents[0], ResolvedHookSet.Empty, new RecordingHookCommandRunner());
SessionHooks hooks = CopilotSessionHooks.Create(command, command.Workflow.GetAgentNodes()[0], ResolvedHookSet.Empty, new RecordingHookCommandRunner());
PreToolUseHookOutput? decision = await hooks.OnPreToolUse!(
new PreToolUseHookInput
@@ -219,7 +219,7 @@ public sealed class CopilotSessionHooksTests
ErrorOccurred = [CreateHookCommand("error-hook")],
};
SessionHooks hooks = CopilotSessionHooks.Create(command, command.Pattern.Agents[0], configuredHooks, runner);
SessionHooks hooks = CopilotSessionHooks.Create(command, command.Workflow.GetAgentNodes()[0], configuredHooks, runner);
await hooks.OnSessionStart!(
new SessionStartHookInput
@@ -293,7 +293,7 @@ public sealed class CopilotSessionHooksTests
public async Task Create_WithoutConfiguredFileHooksPreservesExistingApprovalBehavior()
{
RunTurnCommandDto command = CreateCommandWithoutApprovalRules();
SessionHooks hooks = CopilotSessionHooks.Create(command, command.Pattern.Agents[0], ResolvedHookSet.Empty, new RecordingHookCommandRunner());
SessionHooks hooks = CopilotSessionHooks.Create(command, command.Workflow.GetAgentNodes()[0], ResolvedHookSet.Empty, new RecordingHookCommandRunner());
PreToolUseHookOutput? decision = await hooks.OnPreToolUse!(
new PreToolUseHookInput
@@ -312,34 +312,17 @@ public sealed class CopilotSessionHooksTests
RequestId = "turn-1",
SessionId = "session-1",
ProjectPath = @"C:\workspace\project",
Pattern = new PatternDefinitionDto
Workflow = CreateWorkflow(new ApprovalPolicyDto
{
Id = "pattern-1",
Name = "Pattern",
Mode = "single",
Availability = "available",
ApprovalPolicy = new ApprovalPolicyDto
{
Rules =
[
new ApprovalCheckpointRuleDto
{
Kind = "tool-call",
AgentIds = ["agent-1"],
},
],
},
Agents =
Rules =
[
new PatternAgentDefinitionDto
new ApprovalCheckpointRuleDto
{
Id = "agent-1",
Name = "Primary",
Model = "gpt-5.4",
Instructions = "Help.",
Kind = "tool-call",
AgentIds = ["agent-1"],
},
],
},
}),
};
}
@@ -351,15 +334,7 @@ public sealed class CopilotSessionHooksTests
RequestId = command.RequestId,
SessionId = command.SessionId,
ProjectPath = command.ProjectPath,
Pattern = new PatternDefinitionDto
{
Id = command.Pattern.Id,
Name = command.Pattern.Name,
Mode = command.Pattern.Mode,
Availability = command.Pattern.Availability,
ApprovalPolicy = new ApprovalPolicyDto(),
Agents = command.Pattern.Agents,
},
Workflow = CreateWorkflow(new ApprovalPolicyDto()),
};
}
@@ -370,35 +345,18 @@ public sealed class CopilotSessionHooksTests
RequestId = "turn-1",
SessionId = "session-1",
ProjectPath = @"C:\workspace\project",
Pattern = new PatternDefinitionDto
Workflow = CreateWorkflow(new ApprovalPolicyDto
{
Id = "pattern-1",
Name = "Pattern",
Mode = "single",
Availability = "available",
ApprovalPolicy = new ApprovalPolicyDto
{
Rules =
[
new ApprovalCheckpointRuleDto
{
Kind = "tool-call",
AgentIds = ["agent-1"],
},
],
AutoApprovedToolNames = [category],
},
Agents =
Rules =
[
new PatternAgentDefinitionDto
new ApprovalCheckpointRuleDto
{
Id = "agent-1",
Name = "Primary",
Model = "gpt-5.4",
Instructions = "Help.",
Kind = "tool-call",
AgentIds = ["agent-1"],
},
],
},
AutoApprovedToolNames = [category],
}),
};
}
@@ -416,18 +374,44 @@ public sealed class CopilotSessionHooksTests
{
McpServers = [.. serverNames.Select(CreateMcpServerConfig)],
},
Pattern = new PatternDefinitionDto
Workflow = CreateWorkflow(new ApprovalPolicyDto
{
Id = command.Pattern.Id,
Name = command.Pattern.Name,
Mode = command.Pattern.Mode,
Availability = command.Pattern.Availability,
ApprovalPolicy = new ApprovalPolicyDto
{
Rules = command.Pattern.ApprovalPolicy?.Rules ?? [],
AutoApprovedToolNames = autoApprovedToolNames ?? [],
},
Agents = command.Pattern.Agents,
Rules = command.Workflow.Settings.ApprovalPolicy?.Rules ?? [],
AutoApprovedToolNames = autoApprovedToolNames ?? [],
}),
};
}
private static WorkflowDefinitionDto CreateWorkflow(ApprovalPolicyDto approvalPolicy)
{
return new WorkflowDefinitionDto
{
Id = "workflow-1",
Name = "Workflow",
Graph = new WorkflowGraphDto
{
Nodes =
[
new WorkflowNodeDto
{
Id = "agent-1",
Kind = "agent",
Label = "Primary",
Config = new WorkflowNodeConfigDto
{
Kind = "agent",
Id = "agent-1",
Name = "Primary",
Model = "gpt-5.4",
Instructions = "Help.",
},
},
],
},
Settings = new WorkflowSettingsDto
{
OrchestrationMode = "single",
ApprovalPolicy = approvalPolicy,
},
};
}
@@ -477,3 +461,4 @@ public sealed class CopilotSessionHooksTests
string InputJson,
string ProjectPath);
}