Add local-only mode for contracts with patch export support (#34)

* Add local_only flag to contracts database and models

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* Task completion checkpoint

* Skip automatic completion actions in local_only mode

Add `local_only` flag to contracts that prevents automatic completion
actions (branch, merge, pr) from executing when tasks complete. This
allows users to manually handle code changes via patch files or other
means when operating in local-only mode.

Changes:
- Add `local_only` field to Contract model and request types
- Add database migration for the new column
- Add `local_only` parameter to SpawnTask command in both state.rs and
  daemon protocol.rs
- Modify task manager to skip completion action execution when
  `local_only` is true, with appropriate logging
- Pass `local_only` flag through all task spawning paths:
  - mesh_supervisor.rs (task spawn, retry, resume)
  - mesh.rs (task start, reassign, continue)
  - mesh_chat.rs (run task)
  - contract_chat.rs (run task)
- Update repository create/update functions to handle `local_only`

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* Task completion checkpoint

* Implement core patch export system

Add functionality to create uncompressed, human-readable git patches
for export. This enables users to generate patches that can be manually
applied or shared, without the compression used for internal checkpoints.

Changes:
- Add ExportPatchResult struct with patch content, file count, and line stats
- Add create_export_patch() function that generates diffs against a base SHA
- Add get_head_sha() utility function
- Add parse_diff_stat() helper to extract line counts from git output
- Add CreateExportPatch command to daemon protocol
- Add ExportPatchCreated response message to protocol
- Add handler in task manager to process export patch requests
- Add server-side handling to broadcast patch results to UI

The export patch system automatically finds the merge-base when no base
SHA is provided, trying upstream tracking branch first, then common
default branches (origin/main, origin/master, main, master).

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* Task completion checkpoint

* Add GitActionsPanel frontend component

* Add WorktreeFilesPanel and PatchesListPanel components

* Add local-only mode toggle to contract creation

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

1 files changed, 215 insertions, 0 deletions

diff --git a/makima/frontend/src/lib/api.ts b/makima/frontend/src/lib/api.ts
index b3c18a5..7c9fcd6 100644
--- a/makima/frontend/src/lib/api.ts
+++ b/makima/frontend/src/lib/api.ts
@@ -811,6 +811,112 @@ export async function retryCompletionAction(
   return res.json();
 }
 
+// =============================================================================
+// Git Actions for Tasks (Manual)
+// =============================================================================
+
+/** Response from export patch */
+export interface ExportPatchResponse {
+  success: boolean;
+  taskId: string;
+  fileName: string;
+  filePath?: string;
+  patchSize?: number;
+  message: string;
+}
+
+/**
+ * Export a task's changes as a patch file.
+ * The patch will be saved to the contract's patch directory.
+ */
+export async function exportTaskPatch(
+  taskId: string,
+  fileName?: string
+): Promise<ExportPatchResponse> {
+  const body: Record<string, unknown> = {};
+  if (fileName) {
+    body.fileName = fileName;
+  }
+  const res = await authFetch(`${API_BASE}/api/v1/mesh/tasks/${taskId}/export-patch`, {
+    method: "POST",
+    body: JSON.stringify(body),
+  });
+  if (!res.ok) {
+    const errorText = await res.text();
+    throw new Error(`Failed to export patch: ${errorText || res.statusText}`);
+  }
+  return res.json();
+}
+
+/** Response from push branch */
+export interface PushBranchResponse {
+  success: boolean;
+  taskId: string;
+  branchName: string;
+  remote?: string;
+  message: string;
+}
+
+/**
+ * Push a task's changes to a remote branch.
+ * Creates a branch if it doesn't exist and pushes the commits.
+ */
+export async function pushTaskBranch(
+  taskId: string,
+  branchName?: string
+): Promise<PushBranchResponse> {
+  const body: Record<string, unknown> = {};
+  if (branchName) {
+    body.branchName = branchName;
+  }
+  const res = await authFetch(`${API_BASE}/api/v1/mesh/tasks/${taskId}/push-branch`, {
+    method: "POST",
+    body: JSON.stringify(body),
+  });
+  if (!res.ok) {
+    const errorText = await res.text();
+    throw new Error(`Failed to push branch: ${errorText || res.statusText}`);
+  }
+  return res.json();
+}
+
+/** Response from create PR */
+export interface CreatePRResponse {
+  success: boolean;
+  taskId: string;
+  prUrl?: string;
+  prNumber?: number;
+  branchName?: string;
+  message: string;
+}
+
+/**
+ * Create a pull request for a task's changes.
+ * First pushes the branch if needed, then creates the PR.
+ */
+export async function createTaskPR(
+  taskId: string,
+  title?: string,
+  body?: string
+): Promise<CreatePRResponse> {
+  const reqBody: Record<string, unknown> = {};
+  if (title) {
+    reqBody.title = title;
+  }
+  if (body) {
+    reqBody.body = body;
+  }
+  const res = await authFetch(`${API_BASE}/api/v1/mesh/tasks/${taskId}/create-pr`, {
+    method: "POST",
+    body: JSON.stringify(reqBody),
+  });
+  if (!res.ok) {
+    const errorText = await res.text();
+    throw new Error(`Failed to create PR: ${errorText || res.statusText}`);
+  }
+  return res.json();
+}
+
 /** A suggested directory from a connected daemon */
 export interface DaemonDirectory {
   /** Path to the directory */
@@ -1567,6 +1673,8 @@ export interface ContractSummary {
   status: ContractStatus;
   /** Supervisor task ID for contract orchestration */
   supervisorTaskId: string | null;
+  /** When true, tasks won't auto-push or create PRs - use patch files instead */
+  localOnly: boolean;
   fileCount: number;
   taskCount: number;
   repositoryCount: number;
@@ -1589,6 +1697,8 @@ export interface Contract {
   autonomousLoop: boolean;
   /** Whether to wait for user confirmation before progressing to the next phase */
   phaseGuard: boolean;
+  /** When true, tasks won't auto-push or create PRs - use patch files instead */
+  localOnly: boolean;
   version: number;
   createdAt: string;
   updatedAt: string;
@@ -1622,6 +1732,8 @@ export interface CreateContractRequest {
   contractType?: ContractType;
   /** Initial phase to start in (defaults based on contract type) */
   initialPhase?: ContractPhase;
+  /** When true, tasks won't auto-push or create PRs - use patch files instead */
+  localOnly?: boolean;
 }
 
 export interface UpdateContractRequest {
@@ -2710,3 +2822,106 @@ export function getSupervisorStatus(
 export async function dismissTask(taskId: string): Promise<Task> {
   return updateTask(taskId, { hidden: true });
 }
+
+// =============================================================================
+// Worktree Info Types and Functions
+// =============================================================================
+
+/** File status in the worktree (git status) */
+export type FileStatus = "M" | "A" | "D" | "R" | "C" | "U" | "?" | "modified" | "added" | "deleted" | "renamed" | "copied" | "unmerged" | "untracked";
+
+/** A single changed file in the worktree */
+export interface WorktreeFile {
+  /** File path relative to worktree root */
+  path: string;
+  /** Git status code (M=modified, A=added, D=deleted, R=renamed, C=copied, U=unmerged, ?=untracked) */
+  status: FileStatus;
+  /** Lines added (0 if deleted or unavailable) */
+  linesAdded: number;
+  /** Lines removed (0 if added or unavailable) */
+  linesRemoved: number;
+}
+
+/** Statistics about worktree changes */
+export interface WorktreeStats {
+  /** Number of files changed */
+  filesChanged: number;
+  /** Total lines inserted */
+  insertions: number;
+  /** Total lines deleted */
+  deletions: number;
+}
+
+/** Worktree information for a task */
+export interface WorktreeInfo {
+  /** Task ID */
+  taskId: string;
+  /** Path to the worktree directory */
+  worktreePath: string | null;
+  /** Whether the worktree exists on the daemon */
+  exists: boolean;
+  /** Aggregate statistics */
+  stats: WorktreeStats;
+  /** Changed files list */
+  files: WorktreeFile[];
+  /** Current branch name */
+  branch: string | null;
+  /** Current HEAD commit SHA */
+  headSha: string | null;
+}
+
+/**
+ * Get worktree information for a task.
+ * Returns changed files, stats, and metadata about the worktree.
+ */
+export async function getWorktreeInfo(taskId: string): Promise<WorktreeInfo> {
+  const res = await authFetch(`${API_BASE}/api/v1/mesh/tasks/${taskId}/worktree-info`);
+  if (!res.ok) {
+    const errorText = await res.text();
+    throw new Error(`Failed to get worktree info: ${errorText || res.statusText}`);
+  }
+  return res.json();
+}
+
+// =============================================================================
+// Patch Types and Functions
+// =============================================================================
+
+/** Summary of a patch file (contract file of type "patch") */
+export interface PatchSummary {
+  /** Patch/file ID */
+  id: string;
+  /** Patch name */
+  name: string;
+  /** Optional description */
+  description: string | null;
+  /** Task ID this patch was created from */
+  taskId: string | null;
+  /** Contract ID */
+  contractId: string;
+  /** Number of files in the patch */
+  filesCount: number;
+  /** Total lines added */
+  linesAdded: number;
+  /** Total lines removed */
+  linesRemoved: number;
+  /** List of file paths in the patch (if available) */
+  files: string[] | null;
+  /** When the patch was created */
+  createdAt: string;
+  /** When the patch was last updated */
+  updatedAt: string;
+}
+
+/**
+ * List patches for a task.
+ * Returns contract files of type "patch" associated with the task.
+ */
+export async function listTaskPatches(taskId: string, contractId: string): Promise<PatchSummary[]> {
+  const res = await authFetch(`${API_BASE}/api/v1/mesh/tasks/${taskId}/patches?contractId=${contractId}`);
+  if (!res.ok) {
+    const errorText = await res.text();
+    throw new Error(`Failed to list patches: ${errorText || res.statusText}`);
+  }
+  return res.json();
+}