Merge pull request 'Worktrees' (#25) from worktrees into main

Reviewed-on: #25

docs/api-contract.md

@@ -33,6 +33,24 @@ interface GitBranch {
   remote: boolean;
 }
 
+interface GitWorktree {
+  path: string;
+  head: string | null;
+  short_head: string | null;
+  branch: string | null;
+  bare: boolean;
+  detached: boolean;
+  locked: boolean;
+  lock_reason: string | null;
+  prunable: boolean;
+  prune_reason: string | null;
+  missing: boolean;
+  is_main: boolean;
+  is_current: boolean;
+  clean: boolean;
+  changed_files: number;
+}
+
 interface GitCommit {
   hash: string;
   short_hash: string;
@@ -73,6 +91,14 @@ The command list below includes the repository-management and synchronization AP
 - `set_branch_upstream(path: string, branch: string, upstream?: string): Promise<GitStatus>`
 - `delete_remote_branch(path: string, remote: string, branch: string): Promise<GitStatus>`
 - `checkout_branch(path: string, branch: string): Promise<GitStatus>`
+- `list_worktrees(path: string): Promise<GitWorktree[]>`
+- `add_worktree(path: string, worktreePath: string, ...): Promise<GitWorktree[]>`
+- `remove_worktree(path: string, worktreePath: string, force?: boolean): Promise<GitWorktree[]>`
+- `move_worktree(path: string, worktreePath: string, destination: string): Promise<GitWorktree[]>`
+- `lock_worktree(path: string, worktreePath: string, reason?: string): Promise<GitWorktree[]>`
+- `unlock_worktree(path: string, worktreePath: string): Promise<GitWorktree[]>`
+- `prune_worktrees(path: string): Promise<GitWorktree[]>`
+- `repair_worktree(path: string, worktreePath: string): Promise<GitWorktree[]>`
 - `stage_files(path: string, files: string[]): Promise<GitStatus>`
 - `unstage_files(path: string, files: string[]): Promise<GitStatus>`
 - `restore_files(path: string, files: string[], staged: boolean): Promise<GitStatus>`

src-tauri/src/git.rs

@@ -68,6 +68,25 @@ pub struct GitBranch {
     pub remote: bool,
 }
 
+#[derive(Debug, Clone, PartialEq, Eq, Serialize)]
+pub struct GitWorktree {
+    pub path: String,
+    pub head: Option<String>,
+    pub short_head: Option<String>,
+    pub branch: Option<String>,
+    pub bare: bool,
+    pub detached: bool,
+    pub locked: bool,
+    pub lock_reason: Option<String>,
+    pub prunable: bool,
+    pub prune_reason: Option<String>,
+    pub missing: bool,
+    pub is_main: bool,
+    pub is_current: bool,
+    pub clean: bool,
+    pub changed_files: u32,
+}
+
 #[derive(Debug, Clone, PartialEq, Eq, Serialize)]
 pub struct GitTag {
     pub name: String,
@@ -927,6 +946,291 @@ pub fn delete_branch(
     status_for_repo(&repo)
 }
 
+fn worktree_path_matches(left: &Path, right: &Path) -> bool {
+    match (fs::canonicalize(left), fs::canonicalize(right)) {
+        (Ok(left), Ok(right)) => left == right,
+        _ => left == right,
+    }
+}
+
+fn parse_worktree_porcelain(output: &[u8], current_repo: &Path) -> Vec<GitWorktree> {
+    #[derive(Default)]
+    struct Record {
+        path: Option<String>,
+        head: Option<String>,
+        branch: Option<String>,
+        bare: bool,
+        detached: bool,
+        locked: bool,
+        lock_reason: Option<String>,
+        prunable: bool,
+        prune_reason: Option<String>,
+    }
+
+    fn finish_record(rows: &mut Vec<GitWorktree>, record: &mut Record, current_repo: &Path) {
+        let Some(path) = record.path.take() else {
+            *record = Record::default();
+            return;
+        };
+        let path_buf = PathBuf::from(&path);
+        let missing = !path_buf.exists();
+        let is_current = worktree_path_matches(&path_buf, current_repo);
+        let head = record.head.take();
+        let short_head = head
+            .as_ref()
+            .map(|value| value.chars().take(8).collect::<String>());
+        rows.push(GitWorktree {
+            path,
+            head,
+            short_head,
+            branch: record.branch.take(),
+            bare: record.bare,
+            detached: record.detached,
+            locked: record.locked,
+            lock_reason: record.lock_reason.take(),
+            prunable: record.prunable,
+            prune_reason: record.prune_reason.take(),
+            missing,
+            is_main: rows.is_empty(),
+            is_current,
+            clean: true,
+            changed_files: 0,
+        });
+        *record = Record::default();
+    }
+
+    let mut rows = Vec::new();
+    let mut record = Record::default();
+    for field in output.split(|byte| *byte == 0) {
+        if field.is_empty() {
+            finish_record(&mut rows, &mut record, current_repo);
+            continue;
+        }
+        let value = String::from_utf8_lossy(field);
+        let (key, detail) = value
+            .split_once(' ')
+            .map_or((value.as_ref(), None), |(key, detail)| (key, Some(detail)));
+        match key {
+            "worktree" => record.path = detail.map(str::to_string),
+            "HEAD" => record.head = detail.map(str::to_string),
+            "branch" => {
+                record.branch = detail.map(|branch| {
+                    branch
+                        .strip_prefix("refs/heads/")
+                        .unwrap_or(branch)
+                        .to_string()
+                })
+            }
+            "bare" => record.bare = true,
+            "detached" => record.detached = true,
+            "locked" => {
+                record.locked = true;
+                record.lock_reason = detail.map(str::to_string).filter(|value| !value.is_empty());
+            }
+            "prunable" => {
+                record.prunable = true;
+                record.prune_reason = detail.map(str::to_string).filter(|value| !value.is_empty());
+            }
+            _ => {}
+        }
+    }
+    finish_record(&mut rows, &mut record, current_repo);
+    rows
+}
+
+fn worktrees_for_repo(repo: &Path) -> Result<Vec<GitWorktree>, String> {
+    let output = run_git(repo, ["worktree", "list", "--porcelain", "-z"])?;
+    let mut worktrees = parse_worktree_porcelain(&output, repo);
+    for worktree in &mut worktrees {
+        if worktree.missing {
+            worktree.clean = false;
+            continue;
+        }
+        if worktree.bare {
+            continue;
+        }
+        match run_git_at(
+            Path::new(&worktree.path),
+            ["status", "--porcelain=v1", "-z", "--untracked-files=normal"],
+            "Could not inspect worktree status",
+        ) {
+            Ok(status) => {
+                worktree.changed_files = status
+                    .split(|byte| *byte == 0)
+                    .filter(|entry| entry.len() >= 3 && entry[2] == b' ')
+                    .count() as u32;
+                worktree.clean = worktree.changed_files == 0;
+            }
+            Err(_) => {
+                worktree.clean = false;
+            }
+        }
+    }
+    Ok(worktrees)
+}
+
+#[tauri::command]
+pub fn list_worktrees(path: String) -> Result<Vec<GitWorktree>, String> {
+    let repo = resolve_repo(&path)?;
+    worktrees_for_repo(&repo)
+}
+
+#[tauri::command]
+pub fn add_worktree(
+    path: String,
+    worktree_path: String,
+    branch: Option<String>,
+    new_branch: Option<String>,
+    start_point: Option<String>,
+    detached: Option<bool>,
+    lock: Option<bool>,
+) -> Result<Vec<GitWorktree>, String> {
+    let repo = resolve_repo(&path)?;
+    let destination = worktree_path.trim();
+    if destination.is_empty() {
+        return Err("Choose a folder for the new worktree.".to_string());
+    }
+    let branch = branch
+        .map(|value| value.trim().to_string())
+        .filter(|value| !value.is_empty());
+    let new_branch = new_branch
+        .map(|value| value.trim().to_string())
+        .filter(|value| !value.is_empty());
+    if branch.is_some() && new_branch.is_some() {
+        return Err("Choose either an existing branch or a new branch.".to_string());
+    }
+
+    let mut args = vec![OsString::from("worktree"), OsString::from("add")];
+    if lock.unwrap_or(false) {
+        args.push(OsString::from("--lock"));
+    }
+    if detached.unwrap_or(false) {
+        args.push(OsString::from("--detach"));
+    }
+
+    let target = if let Some(new_branch) = new_branch {
+        let new_branch = validate_new_branch_name(&repo, &new_branch)?;
+        args.push(OsString::from("-b"));
+        args.push(OsString::from(new_branch));
+        start_point
+            .as_deref()
+            .filter(|value| !value.trim().is_empty())
+            .map(|value| verify_commit(&repo, value))
+            .transpose()?
+    } else if let Some(branch) = branch {
+        Some(validate_existing_local_branch_name(&repo, &branch)?)
+    } else {
+        start_point
+            .as_deref()
+            .filter(|value| !value.trim().is_empty())
+            .map(|value| verify_commit(&repo, value))
+            .transpose()?
+    };
+
+    args.push(OsString::from(destination));
+    if let Some(target) = target {
+        args.push(OsString::from(target));
+    }
+    run_git(&repo, args)?;
+    worktrees_for_repo(&repo)
+}
+
+#[tauri::command]
+pub fn remove_worktree(
+    path: String,
+    worktree_path: String,
+    force: Option<bool>,
+) -> Result<Vec<GitWorktree>, String> {
+    let repo = resolve_repo(&path)?;
+    let worktrees = worktrees_for_repo(&repo)?;
+    let target = worktrees
+        .iter()
+        .find(|worktree| {
+            worktree_path_matches(Path::new(&worktree.path), Path::new(&worktree_path))
+        })
+        .ok_or_else(|| "The selected worktree is no longer registered.".to_string())?;
+    if target.is_main {
+        return Err("The main worktree cannot be removed.".to_string());
+    }
+    if target.is_current {
+        return Err("The currently open worktree cannot be removed.".to_string());
+    }
+    if target.locked {
+        return Err("Unlock this worktree before removing it.".to_string());
+    }
+    let mut args = vec![OsString::from("worktree"), OsString::from("remove")];
+    if force.unwrap_or(false) {
+        args.push(OsString::from("--force"));
+    }
+    args.push(OsString::from(worktree_path));
+    run_git(&repo, args)?;
+    worktrees_for_repo(&repo)
+}
+
+#[tauri::command]
+pub fn move_worktree(
+    path: String,
+    worktree_path: String,
+    destination: String,
+) -> Result<Vec<GitWorktree>, String> {
+    let repo = resolve_repo(&path)?;
+    let destination = destination.trim();
+    if destination.is_empty() {
+        return Err("Choose a new location for the worktree.".to_string());
+    }
+    run_git(
+        &repo,
+        [
+            OsString::from("worktree"),
+            OsString::from("move"),
+            OsString::from(worktree_path),
+            OsString::from(destination),
+        ],
+    )?;
+    worktrees_for_repo(&repo)
+}
+
+#[tauri::command]
+pub fn lock_worktree(
+    path: String,
+    worktree_path: String,
+    reason: Option<String>,
+) -> Result<Vec<GitWorktree>, String> {
+    let repo = resolve_repo(&path)?;
+    let mut args = vec![OsString::from("worktree"), OsString::from("lock")];
+    if let Some(reason) = reason
+        .map(|value| value.trim().to_string())
+        .filter(|value| !value.is_empty())
+    {
+        args.push(OsString::from("--reason"));
+        args.push(OsString::from(reason));
+    }
+    args.push(OsString::from(worktree_path));
+    run_git(&repo, args)?;
+    worktrees_for_repo(&repo)
+}
+
+#[tauri::command]
+pub fn unlock_worktree(path: String, worktree_path: String) -> Result<Vec<GitWorktree>, String> {
+    let repo = resolve_repo(&path)?;
+    run_git(&repo, ["worktree", "unlock", "--", worktree_path.as_str()])?;
+    worktrees_for_repo(&repo)
+}
+
+#[tauri::command]
+pub fn prune_worktrees(path: String) -> Result<Vec<GitWorktree>, String> {
+    let repo = resolve_repo(&path)?;
+    run_git(&repo, ["worktree", "prune"])?;
+    worktrees_for_repo(&repo)
+}
+
+#[tauri::command]
+pub fn repair_worktree(path: String, worktree_path: String) -> Result<Vec<GitWorktree>, String> {
+    let repo = resolve_repo(&path)?;
+    run_git(&repo, ["worktree", "repair", "--", worktree_path.as_str()])?;
+    worktrees_for_repo(&repo)
+}
+
 #[tauri::command]
 pub fn create_tag(
     path: String,
@@ -6409,6 +6713,36 @@ mod tests {
             "one\nTWO\nthree\nfour\n"
         );
 
+        let staged_patch = get_file_patch(
+            repo.path.to_string_lossy().to_string(),
+            "old.txt".to_string(),
+            true,
+        )
+        .expect("staged patch should load");
+        let status = apply_file_patch(
+            repo.path.to_string_lossy().to_string(),
+            "old.txt".to_string(),
+            staged_patch,
+            "unstage".to_string(),
+        )
+        .expect("selected staged lines should unstage");
+
+        assert_eq!(status.files[0].staged, None);
+        assert_eq!(status.files[0].unstaged, Some(FileStatusKind::Modified));
+        assert_eq!(
+            git_output_test(&repo.path, ["show", ":old.txt"]),
+            "one\ntwo\nthree"
+        );
+
+        let selected_patch = "diff --git a/old.txt b/old.txt\n--- a/old.txt\n+++ b/old.txt\n@@ -1,3 +1,3 @@\n one\n-two\n+TWO\n three\n";
+        apply_file_patch(
+            repo.path.to_string_lossy().to_string(),
+            "old.txt".to_string(),
+            selected_patch.to_string(),
+            "stage".to_string(),
+        )
+        .expect("selected line should stage again");
+
         let unstaged_patch = get_file_patch(
             repo.path.to_string_lossy().to_string(),
             "old.txt".to_string(),
@@ -6687,6 +7021,76 @@ mod tests {
         assert!(result.lines[0].is_uncommitted);
     }
 
+    #[test]
+    fn parse_worktree_porcelain_preserves_flags_and_reasons() {
+        let current = Path::new("/repos/main");
+        let output = b"worktree /repos/main\0HEAD 1234567890abcdef\0branch refs/heads/main\0\0worktree /repos/feature\0HEAD abcdef1234567890\0detached\0locked external drive\0prunable gitdir file points to non-existent location\0\0";
+
+        let rows = parse_worktree_porcelain(output, current);
+
+        assert_eq!(rows.len(), 2);
+        assert!(rows[0].is_main);
+        assert_eq!(rows[0].branch.as_deref(), Some("main"));
+        assert_eq!(rows[0].short_head.as_deref(), Some("12345678"));
+        assert!(rows[1].detached);
+        assert!(rows[1].locked);
+        assert_eq!(rows[1].lock_reason.as_deref(), Some("external drive"));
+        assert!(rows[1].prunable);
+    }
+
+    #[test]
+    fn worktree_add_list_and_remove_round_trip() {
+        let repo = init_temp_repo("worktree_round_trip");
+        let destination = temp_dir("worktree_round_trip_destination");
+        commit_initial_file(&repo.path);
+        run_git_test(&repo.path, ["branch", "feature"]);
+
+        let rows = add_worktree(
+            repo.path.to_string_lossy().to_string(),
+            destination.path.to_string_lossy().to_string(),
+            Some("feature".to_string()),
+            None,
+            None,
+            Some(false),
+            Some(false),
+        )
+        .expect("worktree should be created");
+
+        let linked = rows
+            .iter()
+            .find(|row| row.branch.as_deref() == Some("feature"))
+            .expect("linked worktree should be listed");
+        assert!(!linked.is_main);
+        assert!(linked.clean);
+
+        let rows = lock_worktree(
+            repo.path.to_string_lossy().to_string(),
+            destination.path.to_string_lossy().to_string(),
+            Some("test lock".to_string()),
+        )
+        .expect("worktree should lock");
+        let linked = rows
+            .iter()
+            .find(|row| row.branch.as_deref() == Some("feature"))
+            .expect("linked worktree should remain listed");
+        assert!(linked.locked);
+        assert_eq!(linked.lock_reason.as_deref(), Some("test lock"));
+
+        unlock_worktree(
+            repo.path.to_string_lossy().to_string(),
+            destination.path.to_string_lossy().to_string(),
+        )
+        .expect("worktree should unlock");
+
+        let rows = remove_worktree(
+            repo.path.to_string_lossy().to_string(),
+            destination.path.to_string_lossy().to_string(),
+            Some(false),
+        )
+        .expect("worktree should be removed");
+        assert_eq!(rows.len(), 1);
+    }
+
     #[test]
     fn parse_ai_review_accepts_fenced_json_and_normalizes_findings() {
         let raw = r#"```json

src-tauri/src/main.rs

@@ -6,23 +6,24 @@ mod telemetry;
 
 use badge::set_sync_badge;
 use git::{
-    SearchCancellationState, add_remote, amend_commit, apply_file_patch, cancel_code_search,
+    SearchCancellationState, add_remote, add_worktree, amend_commit, apply_file_patch,
-    cancel_file_history, checkout_branch, cherry_pick_abort, cherry_pick_commit,
+    cancel_code_search, cancel_file_history, checkout_branch, cherry_pick_abort,
-    cherry_pick_continue, clone_repository, commit, commit_ai_generate, commit_ai_load,
+    cherry_pick_commit, cherry_pick_continue, clone_repository, commit, commit_ai_generate,
-    commit_ai_local_models, commit_ai_review, commit_ai_status, compare_commits,
+    commit_ai_load, commit_ai_local_models, commit_ai_review, commit_ai_status, compare_commits,
     compare_file_to_head, compare_file_to_parent, create_branch, create_tag, cred_delete,
     cred_load, cred_save, delete_branch, delete_remote_branch, delete_tag,
     diff_file_against_working_tree, fetch, get_file_blame, get_file_patch, get_remote_url,
     get_status, init_repository, last_commit_message, list_branches, list_commits,
     list_file_history, list_interactive_rebase_commits, list_reflog, list_remotes,
-    list_repository_files, list_stashes, list_tags, merge_abort, merge_branch, merge_continue,
+    list_repository_files, list_stashes, list_tags, list_worktrees, lock_worktree, merge_abort,
-    open_repo_in_explorer, open_repository, open_repository_bundle, open_repository_file, pull,
+    merge_branch, merge_continue, move_worktree, open_repo_in_explorer, open_repository,
-    push, push_tag, read_conflict, rebase_abort, rebase_branch, rebase_continue, remove_remote,
+    open_repository_bundle, open_repository_file, prune_worktrees, pull, push, push_tag,
-    rename_branch, resolve_conflict, resolve_conflict_side, restore_file_from_commit,
+    read_conflict, rebase_abort, rebase_branch, rebase_continue, remove_remote, remove_worktree,
-    restore_files, restore_reflog_entry, restore_to_commit, revert_commit,
+    rename_branch, repair_worktree, resolve_conflict, resolve_conflict_side,
-    run_sequence_editor_if_requested, search_code_introductions, set_branch_upstream, stage_files,
+    restore_file_from_commit, restore_files, restore_reflog_entry, restore_to_commit,
-    start_interactive_rebase, stash_apply, stash_drop, stash_pop, stash_push, undo_last_commit,
+    revert_commit, run_sequence_editor_if_requested, search_code_introductions,
-    unstage_files, update_remote,
+    set_branch_upstream, stage_files, start_interactive_rebase, stash_apply, stash_drop, stash_pop,
+    stash_push, undo_last_commit, unlock_worktree, unstage_files, update_remote,
 };
 use tauri::Manager;
 use telemetry::{emit_frontend_log, emit_frontend_span, set_telemetry_enabled};
@@ -135,6 +136,14 @@ async fn main() {
             create_branch,
             rename_branch,
             delete_branch,
+            list_worktrees,
+            add_worktree,
+            remove_worktree,
+            move_worktree,
+            lock_worktree,
+            unlock_worktree,
+            prune_worktrees,
+            repair_worktree,
             list_tags,
             create_tag,
             delete_tag,

src/App.svelte

@@ -37,10 +37,12 @@
   import StatusPanel from "./lib/components/StatusPanel.svelte";
   import SyncSettingsDialog from "./lib/components/SyncSettingsDialog.svelte";
   import UpdateToast from "./lib/components/UpdateToast.svelte";
+  import WorktreeDialog from "./lib/components/WorktreeDialog.svelte";
 
   import {
     amendCommit,
     addRemote,
+    addWorktree,
     checkoutBranch,
     cherryPickAbort,
     cherryPickCommit,
@@ -72,6 +74,7 @@
     listRemotes,
     listStashes,
     listTags,
+    listWorktrees,
     listCommits,
     listFileHistory,
     listInteractiveRebaseCommits,
@@ -83,10 +86,15 @@
     openRepoInExplorer,
     openRepositoryFile,
     openRepositoryBundle,
+    lockWorktree,
+    moveWorktree,
+    pruneWorktrees,
     pull,
     push,
     pushTag,
     removeRemote,
+    removeWorktree,
+    repairWorktree,
     revertCommit,
     setBranchUpstream,
     updateRemote,
@@ -115,6 +123,7 @@
     stashPop,
     stashPush,
     undoLastCommit,
+    unlockWorktree,
     unstageFiles,
   } from "./lib/git";
 
@@ -142,6 +151,7 @@
     GitStash,
     GitStatus,
     GitTag,
+    GitWorktree,
     LocalModelOption,
     PatchApplyAction,
     PreparedResolution,
@@ -167,7 +177,7 @@
   type PendingDiscard =
     | { kind: "file"; files: GitFileStatus[]; staged: boolean }
     | { kind: "all-changes"; files: GitFileStatus[] }
-    | { kind: "hunk"; file: GitFileStatus; staged: boolean; action: PatchApplyAction; patch: string };
+    | { kind: "patch"; file: GitFileStatus; staged: boolean; action: PatchApplyAction; patch: string; scope: "hunk" | "lines" };
 
   interface RepoTab {
     path: string;
@@ -304,6 +314,11 @@
   let renameBranchTarget: GitBranchInfo | null = null;
   let deleteBranchTarget: GitBranchInfo | null = null;
   let deleteBranchForce = false;
+  let worktreeDialogOpen = false;
+  let worktreeInitialBranch = "";
+  let worktrees: GitWorktree[] = [];
+  let worktreesLoading = false;
+  let worktreeError = "";
   let compareSelectOpen = false;
   let compareDialogOpen = false;
   let interactiveRebaseOpen = false;
@@ -719,7 +734,7 @@
   }
 
   async function autoRefreshTick() {
-    if (!autoRefreshEnabled || activeView !== "repository" || !activeRepoPath || isBusy || autoRefreshInFlight || resolveDialogOpen || compareDialogOpen || compareSelectOpen || interactiveRebaseOpen || reflogOpen || newBranchCommit || globalSearchOpen || helpOpen) return;
+    if (!autoRefreshEnabled || activeView !== "repository" || !activeRepoPath || isBusy || autoRefreshInFlight || resolveDialogOpen || compareDialogOpen || compareSelectOpen || interactiveRebaseOpen || reflogOpen || worktreeDialogOpen || newBranchCommit || globalSearchOpen || helpOpen) return;
     const path = activeRepoPath;
     autoRefreshInFlight = true;
     try {
@@ -1760,6 +1775,10 @@
     globalSearchResults = [];
     deleteBranchTarget = null;
     deleteBranchForce = false;
+    worktreeDialogOpen = false;
+    worktreeInitialBranch = "";
+    worktrees = [];
+    worktreeError = "";
     globalSearchOpen = false;
     globalSearchError = "";
     resolveDialogOpen = false;
@@ -2369,6 +2388,146 @@
     deleteBranchForce = false;
   }
 
+  async function openWorktreeDialog(branch = "") {
+    if (!activeRepoPath || isBusy) return;
+    worktreeInitialBranch = branch;
+    worktreeDialogOpen = true;
+    worktreeError = "";
+    worktreesLoading = true;
+    try {
+      worktrees = await listWorktrees(activeRepoPath);
+      trackEvent("worktree_dialog_opened", { linked_worktrees: Math.max(0, worktrees.length - 1) });
+    } catch (error) {
+      worktreeError = errorToMessage(error);
+    } finally {
+      worktreesLoading = false;
+    }
+  }
+
+  function openBranchInWorktree(branch: GitBranchInfo) {
+    if (branch.remote) return;
+    void openWorktreeDialog(branch.name);
+  }
+
+  async function refreshWorktrees() {
+    if (!activeRepoPath || worktreesLoading) return;
+    worktreesLoading = true;
+    worktreeError = "";
+    try {
+      worktrees = await listWorktrees(activeRepoPath);
+    } catch (error) {
+      worktreeError = errorToMessage(error);
+    } finally {
+      worktreesLoading = false;
+    }
+  }
+
+  async function runWorktreeOperation(
+    label: string,
+    task: () => Promise<GitWorktree[]>,
+    eventName: string,
+  ): Promise<boolean> {
+    if (!activeRepoPath || isBusy) return false;
+    operation = label;
+    worktreeError = "";
+    try {
+      worktrees = await task();
+      await refreshBranchList(activeRepoPath);
+      trackEvent(eventName, { linked_worktrees: Math.max(0, worktrees.length - 1) });
+      return true;
+    } catch (error) {
+      worktreeError = errorToMessage(error);
+      return false;
+    } finally {
+      operation = "";
+    }
+  }
+
+  async function createWorktree(request: {
+    worktreePath: string;
+    branch?: string;
+    newBranch?: string;
+    startPoint?: string;
+    detached?: boolean;
+    lock?: boolean;
+  }): Promise<boolean> {
+    return runWorktreeOperation(
+      "Creating worktree",
+      () => addWorktree(activeRepoPath, request.worktreePath, request),
+      "worktree_created",
+    );
+  }
+
+  async function openWorktreeTab(worktree: GitWorktree) {
+    if (worktree.missing || worktree.bare || isBusy) return;
+    worktreeDialogOpen = false;
+    worktreeInitialBranch = "";
+    await openRepo(worktree.path);
+  }
+
+  async function removeSelectedWorktree(worktree: GitWorktree, force: boolean): Promise<boolean> {
+    if (repoTabs.some((tab) => sameRepoPath(tab.path, worktree.path))) {
+      worktreeError = "Close this worktree's repository tab before removing it.";
+      return false;
+    }
+    return runWorktreeOperation(
+      `Removing ${worktree.branch || "worktree"}`,
+      () => removeWorktree(activeRepoPath, worktree.path, force),
+      "worktree_removed",
+    );
+  }
+
+  async function moveSelectedWorktree(worktree: GitWorktree, destination: string) {
+    if (repoTabs.some((tab) => sameRepoPath(tab.path, worktree.path))) {
+      worktreeError = "Close this worktree's repository tab before moving it.";
+      return;
+    }
+    await runWorktreeOperation(
+      `Moving ${worktree.branch || "worktree"}`,
+      () => moveWorktree(activeRepoPath, worktree.path, destination),
+      "worktree_moved",
+    );
+  }
+
+  function lockSelectedWorktree(worktree: GitWorktree, reason: string): Promise<boolean> {
+    return runWorktreeOperation(
+      `Locking ${worktree.branch || "worktree"}`,
+      () => lockWorktree(activeRepoPath, worktree.path, reason),
+      "worktree_locked",
+    );
+  }
+
+  async function unlockSelectedWorktree(worktree: GitWorktree) {
+    await runWorktreeOperation(
+      `Unlocking ${worktree.branch || "worktree"}`,
+      () => unlockWorktree(activeRepoPath, worktree.path),
+      "worktree_unlocked",
+    );
+  }
+
+  async function pruneStaleWorktrees() {
+    await runWorktreeOperation(
+      "Pruning stale worktrees",
+      () => pruneWorktrees(activeRepoPath),
+      "worktrees_pruned",
+    );
+  }
+
+  async function repairSelectedWorktree(worktree: GitWorktree, location: string) {
+    await runWorktreeOperation(
+      `Repairing ${worktree.branch || "worktree"}`,
+      () => repairWorktree(activeRepoPath, location),
+      "worktree_repaired",
+    );
+  }
+
+  function closeWorktreeDialog() {
+    if (isBusy) return;
+    worktreeDialogOpen = false;
+    worktreeInitialBranch = "";
+    worktreeError = "";
+  }
+
   function openNewBranchDialog(commit: GitCommit) {
     if (!activeRepoPath || isBusy) return;
     newBranchCommit = commit;
@@ -3144,14 +3303,15 @@
     blameError = "";
   }
 
-  function patchOperationLabel(action: PatchApplyAction, file: GitFileStatus): string {
+  function patchOperationLabel(action: PatchApplyAction, file: GitFileStatus, scope: "hunk" | "lines"): string {
+    const target = scope === "lines" ? "selected lines" : "hunk";
     switch (action) {
       case "stage":
-        return `Staging hunk in ${file.path}`;
+        return `Staging ${target} in ${file.path}`;
       case "unstage":
-        return `Unstaging hunk in ${file.path}`;
+        return `Unstaging ${target} in ${file.path}`;
       default:
-        return `Discarding hunk in ${file.path}`;
+        return `Discarding ${target} in ${file.path}`;
     }
   }
 
@@ -3164,9 +3324,10 @@
     patch: string,
     file: GitFileStatus,
     staged: boolean,
+    scope: "hunk" | "lines",
   ) {
     if (!activeRepoPath || isBusy) return;
-    operation = patchOperationLabel(action, file);
+    operation = patchOperationLabel(action, file, scope);
     errorMessage = "";
     linePatchError = "";
 
@@ -3194,21 +3355,21 @@
     }
   }
 
-  async function applyLinePatch(action: PatchApplyAction, patch: string) {
+  async function applyLinePatch(action: PatchApplyAction, patch: string, scope: "hunk" | "lines") {
     if (!activeRepoPath || !linePatchFile || isBusy) return;
     const file = linePatchFile;
     const staged = linePatchStaged;
 
     if (isDiscardPatchAction(action)) {
-      pendingDiscard = { kind: "hunk", file, staged, action, patch };
+      pendingDiscard = { kind: "patch", file, staged, action, patch, scope };
       trackEvent("discard_confirm_opened", {
-        kind: "hunk",
+        kind: scope,
         staged: staged ? 1 : 0,
       });
       return;
     }
 
-    await runLinePatchAction(action, patch, file, staged);
+    await runLinePatchAction(action, patch, file, staged, scope);
   }
 
   async function confirmDiscard() {
@@ -3220,7 +3381,7 @@
     } else if (discard.kind === "all-changes") {
       await runDiscardAllChanges(discard.files);
     } else {
-      await runLinePatchAction(discard.action, discard.patch, discard.file, discard.staged);
+      await runLinePatchAction(discard.action, discard.patch, discard.file, discard.staged, discard.scope);
     }
 
     pendingDiscard = null;
@@ -3730,6 +3891,7 @@
     else if (event.key === "Escape" && newBranchCommit) newBranchCommit = null;
     else if (event.key === "Escape" && renameBranchTarget) renameBranchTarget = null;
     else if (event.key === "Escape" && deleteBranchTarget) closeDeleteBranchDialog();
+    else if (event.key === "Escape" && worktreeDialogOpen) closeWorktreeDialog();
     else if (event.key === "Escape" && interactiveRebaseOpen && !isBusy) interactiveRebaseOpen = false;
     else if (event.key === "Escape" && reflogOpen && !isBusy) reflogOpen = false;
     else if (event.key === "Escape" && compareSelectOpen) compareSelectOpen = false;
@@ -4115,6 +4277,8 @@
           onCreateTag={createNewTag}
           onDeleteTag={deleteLocalTag}
           onPushTag={pushLocalTag}
+          onManageWorktrees={() => { void openWorktreeDialog(); }}
+          onCreateWorktree={openBranchInWorktree}
           collapsed={branchPanelCollapsed}
           onToggleCollapsed={toggleBranchPanelCollapsed}
         />
@@ -4451,9 +4615,9 @@
 
 {#if pendingDiscard}
   <DiscardConfirmDialog
-    files={pendingDiscard.kind === "hunk" ? [pendingDiscard.file] : pendingDiscard.files}
+    files={pendingDiscard.kind === "patch" ? [pendingDiscard.file] : pendingDiscard.files}
     staged={pendingDiscard.kind === "all-changes" ? null : pendingDiscard.staged}
-    scope={pendingDiscard.kind === "hunk" ? "hunk" : "file"}
+    scope={pendingDiscard.kind === "patch" ? pendingDiscard.scope : "file"}
     {isBusy}
     onConfirm={confirmDiscard}
     onClose={closeDiscardConfirm}
@@ -4480,6 +4644,27 @@
   />
 {/if}
 
+{#if worktreeDialogOpen}
+  <WorktreeDialog
+    {worktrees}
+    {branches}
+    initialBranch={worktreeInitialBranch}
+    isLoading={worktreesLoading}
+    {isBusy}
+    error={worktreeError}
+    onRefresh={refreshWorktrees}
+    onOpen={openWorktreeTab}
+    onAdd={createWorktree}
+    onRemove={removeSelectedWorktree}
+    onMove={moveSelectedWorktree}
+    onLock={lockSelectedWorktree}
+    onUnlock={unlockSelectedWorktree}
+    onPrune={pruneStaleWorktrees}
+    onRepair={repairSelectedWorktree}
+    onClose={closeWorktreeDialog}
+  />
+{/if}
+
 <!-- Create a branch from a specific commit in the history -->
 {#if newBranchCommit}
   <NewBranchDialog

src/app.css

@@ -2064,6 +2064,20 @@
   .tag-group-head { display: flex; align-items: center; gap: 6px; }
   .tag-group-head .branch-group-toggle { flex: 1; min-width: 0; }
   .tag-group-head .branch-create-toggle { flex-shrink: 0; }
+  .worktree-group-toggle {
+    border-color: rgba(77, 182, 214, 0.12);
+    background: linear-gradient(90deg, rgba(77, 182, 214, 0.055), transparent 72%);
+  }
+  .worktree-group-toggle:hover:not(:disabled) {
+    border-color: rgba(77, 182, 214, 0.25);
+    background: linear-gradient(90deg, rgba(77, 182, 214, 0.1), rgba(77, 182, 214, 0.025));
+    color: var(--color-ink);
+  }
+  .worktree-group-toggle svg { color: #76cde7; }
+  .worktree-group-toggle .branch-group-count {
+    color: #9edced;
+    background: rgba(77, 182, 214, 0.11);
+  }
 
   .tag-create-form { grid-template-columns: auto minmax(0, 1fr) minmax(0, 1fr) auto auto; }
 
@@ -3261,6 +3275,19 @@
     box-shadow: var(--app-dialog-shadow), 0 0 0 1px rgba(255, 90, 103, 0.04);
     overflow: auto;
   }
+  .worktree-dialog {
+    grid-template-rows: auto auto auto minmax(0, 1fr) auto;
+    width: min(920px, calc(100vw - 32px));
+    height: min(820px, calc(100vh - 32px));
+    border-color: rgba(77, 182, 214, 0.24);
+  }
+  .worktree-confirm-dialog {
+    grid-template-rows: auto auto auto;
+    width: min(520px, calc(100vw - 32px));
+    height: auto;
+    max-height: calc(100vh - 32px);
+  }
+  .worktree-nested-backdrop { z-index: 70; }
   .ai-settings-dialog {
     display: block;
     width: min(560px, calc(100vw - 32px));
@@ -3884,6 +3911,244 @@
     font-weight: 600;
   }
   .branch-delete-confirm { min-width: 116px; }
+  .worktree-dialog-header {
+    background:
+      linear-gradient(90deg, rgba(77, 182, 214, 0.09), transparent 40%),
+      var(--app-dialog-chrome);
+  }
+  .worktree-dialog-heading { display: flex; align-items: center; gap: 11px; }
+  .worktree-dialog-mark {
+    display: grid;
+    place-items: center;
+    width: 34px;
+    height: 34px;
+    border: 1px solid rgba(77, 182, 214, 0.3);
+    border-radius: 9px;
+    color: #8ed8ee;
+    background: rgba(77, 182, 214, 0.1);
+    box-shadow: inset 0 1px 0 rgba(255,255,255,0.05);
+  }
+  .worktree-summary {
+    display: grid;
+    grid-template-columns: repeat(3, minmax(0, 1fr)) auto;
+    align-items: stretch;
+    gap: 1px;
+    padding: 1px 0;
+    border-bottom: 1px solid var(--color-border-subtle);
+    background: var(--color-border-subtle);
+  }
+  .worktree-summary > div {
+    display: flex;
+    align-items: baseline;
+    gap: 7px;
+    min-width: 0;
+    padding: 11px 14px;
+    background: var(--app-dialog-bg);
+  }
+  .worktree-summary > div strong { color: var(--color-ink); font-family: var(--font-mono); font-size: 14px; }
+  .worktree-summary > div span { overflow: hidden; color: var(--color-ink-faint); font-size: 10.5px; font-weight: 700; text-overflow: ellipsis; white-space: nowrap; }
+  .worktree-summary > div.attention strong { color: #ffc07a; }
+  .worktree-summary > .btn-primary { align-self: center; margin: 0 14px; white-space: nowrap; }
+  .worktree-error {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    padding: 9px 16px;
+    border-bottom: 1px solid rgba(255, 90, 103, 0.2);
+    color: #ffb8bf;
+    background: rgba(255, 90, 103, 0.08);
+    font-size: 11.5px;
+    font-weight: 650;
+  }
+  .worktree-content {
+    min-height: 0;
+    overflow: auto;
+    padding: 14px;
+    background:
+      radial-gradient(circle at 92% 0%, rgba(77, 182, 214, 0.055), transparent 28%),
+      var(--app-dialog-bg);
+  }
+  .worktree-create-card {
+    display: grid;
+    gap: 14px;
+    margin-bottom: 14px;
+    padding: 14px;
+    border: 1px solid rgba(77, 182, 214, 0.26);
+    border-radius: 10px;
+    background: var(--color-surface-raised);
+    box-shadow: inset 0 1px 0 rgba(255,255,255,0.035);
+  }
+  .worktree-create-card > header { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
+  .worktree-create-card h3 { margin: 3px 0 0; color: var(--color-ink); font-size: 13px; font-weight: 700; }
+  .worktree-mode-tabs {
+    display: grid;
+    grid-template-columns: repeat(3, 1fr);
+    gap: 3px;
+    padding: 3px;
+    border: 1px solid var(--color-border-subtle);
+    border-radius: 8px;
+    background: rgba(0, 0, 0, 0.14);
+  }
+  .worktree-mode-tabs button {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    gap: 6px;
+    min-height: 32px;
+    border-color: transparent;
+    color: var(--color-ink-faint);
+    background: transparent;
+    font-size: 10.5px;
+    font-weight: 750;
+  }
+  .worktree-mode-tabs button.active {
+    border-color: rgba(77, 182, 214, 0.27);
+    color: #b8e7f6;
+    background: rgba(77, 182, 214, 0.11);
+    box-shadow: 0 3px 12px rgba(0,0,0,0.14);
+  }
+  .worktree-create-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
+  .worktree-create-fields label,
+  .worktree-lock-body label { display: grid; gap: 5px; color: var(--color-ink-dim); font-size: 10.5px; font-weight: 750; }
+  .worktree-create-fields input,
+  .worktree-create-fields select,
+  .worktree-lock-body input { width: 100%; min-width: 0; }
+  .worktree-create-fields .worktree-path-field { grid-column: 1 / -1; }
+  .worktree-path-field > div { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 7px; }
+  .worktree-create-card > footer { display: flex; align-items: center; justify-content: space-between; gap: 14px; }
+  .worktree-check { display: flex; align-items: flex-start; gap: 8px; color: var(--color-ink-muted); font-size: 11px; cursor: pointer; }
+  .worktree-check input { width: auto; margin-top: 2px; }
+  .worktree-check span { display: grid; gap: 1px; }
+  .worktree-check strong { color: var(--color-ink); font-size: 11px; }
+  .worktree-check small { color: var(--color-ink-faint); font-size: 10px; font-weight: 500; }
+  .worktree-check.danger strong,
+  .worktree-check.danger small { color: #ffb8bf; }
+  .worktree-list { display: grid; gap: 8px; }
+  .worktree-card {
+    position: relative;
+    display: grid;
+    grid-template-columns: 28px minmax(0, 1fr);
+    min-width: 0;
+    border: 1px solid var(--color-border-subtle);
+    border-radius: 9px;
+    background: var(--color-surface-raised);
+    overflow: hidden;
+  }
+  .worktree-card.current { border-color: rgba(77, 182, 214, 0.34); box-shadow: inset 0 0 0 1px rgba(77, 182, 214, 0.06); }
+  .worktree-card.stale { border-color: rgba(255, 151, 61, 0.28); }
+  .worktree-rail {
+    position: relative;
+    display: grid;
+    place-items: start center;
+    padding-top: 18px;
+    background: rgba(0,0,0,0.1);
+  }
+  .worktree-rail::before {
+    content: "";
+    position: absolute;
+    top: 0;
+    bottom: 0;
+    left: 50%;
+    width: 1px;
+    background: rgba(77, 182, 214, 0.22);
+  }
+  .worktree-rail span {
+    position: relative;
+    z-index: 1;
+    width: 9px;
+    height: 9px;
+    border: 2px solid #76cde7;
+    border-radius: 50%;
+    background: var(--color-surface-solid);
+    box-shadow: 0 0 0 3px rgba(77, 182, 214, 0.08);
+  }
+  .worktree-rail i {
+    position: absolute;
+    top: 31px;
+    left: 50%;
+    width: 7px;
+    height: 14px;
+    border-bottom: 1px solid rgba(77, 182, 214, 0.26);
+    border-left: 1px solid rgba(77, 182, 214, 0.26);
+  }
+  .worktree-card-main { display: grid; gap: 9px; min-width: 0; padding: 12px; }
+  .worktree-card-main > header { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
+  .worktree-name { display: flex; align-items: center; gap: 8px; min-width: 0; color: var(--color-accent); }
+  .worktree-name > div { display: grid; gap: 1px; min-width: 0; }
+  .worktree-name strong { overflow: hidden; color: var(--color-ink); font-size: 12.5px; text-overflow: ellipsis; white-space: nowrap; }
+  .worktree-name span { color: var(--color-ink-faint); font-size: 10px; }
+  .worktree-badges { display: flex; align-items: center; justify-content: flex-end; flex-wrap: wrap; gap: 4px; }
+  .worktree-badges span {
+    display: inline-flex;
+    align-items: center;
+    gap: 3px;
+    padding: 2px 6px;
+    border: 1px solid var(--color-border-subtle);
+    border-radius: 999px;
+    color: var(--color-ink-faint);
+    background: rgba(255,255,255,0.025);
+    font-size: 8.5px;
+    font-weight: 800;
+    letter-spacing: 0.04em;
+    text-transform: uppercase;
+  }
+  .worktree-badges span.active { border-color: rgba(78, 202, 118, 0.25); color: #77d99a; background: rgba(78, 202, 118, 0.08); }
+  .worktree-badges span.locked { border-color: rgba(111, 140, 255, 0.26); color: #aebcff; background: rgba(111, 140, 255, 0.08); }
+  .worktree-badges span.danger { border-color: rgba(255, 151, 61, 0.3); color: #ffc07a; background: rgba(255, 151, 61, 0.08); }
+  .worktree-path { display: flex; align-items: center; gap: 5px; min-width: 0; color: var(--color-ink-faint); }
+  .worktree-path code { overflow: hidden; font-family: var(--font-mono); font-size: 10.5px; text-overflow: ellipsis; white-space: nowrap; }
+  .worktree-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 6px 12px; color: var(--color-ink-faint); font-size: 9.5px; }
+  .worktree-meta span { display: inline-flex; align-items: center; gap: 4px; }
+  .worktree-meta span.dirty,
+  .worktree-meta span.danger { color: #ffc07a; }
+  .worktree-card-main > footer { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding-top: 2px; }
+  .worktree-card-actions { display: flex; align-items: center; justify-content: flex-end; flex-wrap: wrap; gap: 5px; }
+  .worktree-card-actions .danger { border-color: rgba(255, 90, 103, 0.2); color: #ff9aa4; background: rgba(255, 90, 103, 0.06); }
+  .worktree-dialog-footer {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    gap: 12px;
+    padding: 10px 14px;
+    border-top: 1px solid var(--color-border-subtle);
+    background: var(--app-dialog-chrome);
+  }
+  .worktree-dialog-footer > div { display: flex; align-items: center; gap: 6px; color: var(--color-ink-faint); font-size: 10px; }
+  .worktree-loading,
+  .worktree-empty {
+    display: grid;
+    place-items: center;
+    align-content: center;
+    gap: 7px;
+    min-height: 240px;
+    color: var(--color-ink-faint);
+    text-align: center;
+    font-size: 11px;
+  }
+  .worktree-empty strong { color: var(--color-ink); font-size: 13px; }
+  .worktree-confirm-body {
+    display: grid;
+    grid-template-columns: auto minmax(0, 1fr);
+    gap: 13px;
+    padding: 17px 16px;
+  }
+  .worktree-confirm-body > div { display: grid; gap: 10px; min-width: 0; }
+  .worktree-confirm-body p { margin: 0; color: var(--color-ink-muted); font-size: 12px; line-height: 1.45; }
+  .worktree-confirm-body code { overflow: auto; padding: 8px; border: 1px solid var(--color-border-subtle); border-radius: 6px; color: var(--color-ink); background: rgba(0,0,0,0.16); font-size: 10.5px; }
+  .worktree-lock-body { padding: 18px 16px; }
+  .worktree-lock-body label > span { display: flex; align-items: baseline; justify-content: space-between; }
+  .worktree-lock-body small { color: var(--color-ink-faint); font-size: 9.5px; font-weight: 500; }
+  @media (max-width: 700px) {
+    .worktree-summary { grid-template-columns: repeat(3, 1fr); }
+    .worktree-summary > div { display: grid; gap: 2px; }
+    .worktree-summary > .btn-primary { grid-column: 1 / -1; margin: 9px 14px; }
+    .worktree-create-fields { grid-template-columns: 1fr; }
+    .worktree-create-fields .worktree-path-field { grid-column: auto; }
+    .worktree-create-card > footer,
+    .worktree-card-main > footer { align-items: stretch; flex-direction: column; }
+    .worktree-card-actions { justify-content: flex-start; }
+    .worktree-dialog-footer > div { display: none; }
+  }
   .discard-target-list {
     display: grid;
     gap: 4px;
@@ -3916,11 +4181,37 @@
 
   .line-patch-body {
     display: grid;
-    grid-template-rows: minmax(0, 1fr);
+    grid-template-rows: auto minmax(0, 1fr);
     min-height: 0;
     overflow: hidden;
   }
 
+  .line-patch-selection-bar {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    gap: 14px;
+    min-height: 46px;
+    padding: 7px 12px;
+    border-bottom: 1px solid var(--color-border-subtle);
+    background: var(--app-dialog-chrome);
+  }
+  .line-patch-selection-bar.active {
+    background:
+      linear-gradient(90deg, rgba(77, 182, 214, 0.1), transparent 44%),
+      var(--app-dialog-chrome);
+  }
+  .line-patch-selection-bar > div:first-child {
+    display: flex;
+    align-items: center;
+    gap: 7px;
+    min-width: 0;
+    color: var(--color-accent);
+  }
+  .line-patch-selection-bar strong { color: var(--color-ink); font-size: 11.5px; }
+  .line-patch-selection-bar span { color: var(--color-ink-faint); font-size: 10px; }
+  .line-patch-selected-actions { display: flex; align-items: center; justify-content: flex-end; gap: 6px; }
+
   .line-patch-scroll {
     min-height: 0;
     overflow: auto;
@@ -3946,6 +4237,33 @@
     border-bottom: 1px solid var(--color-border-subtle);
     background: color-mix(in srgb, var(--code-surface-raised) 96%, transparent);
   }
+  .line-patch-select-hunk,
+  .line-patch-line-select {
+    display: grid;
+    place-items: center;
+    width: 16px;
+    min-width: 16px;
+    height: 16px;
+    min-height: 16px;
+    padding: 0;
+    border: 1px solid var(--color-border);
+    border-radius: 4px;
+    color: #ffffff;
+    background: var(--code-surface);
+    box-shadow: none;
+  }
+  .line-patch-select-hunk:hover:not(:disabled),
+  .line-patch-line-select:hover:not(:disabled) {
+    border-color: rgba(77, 182, 214, 0.65);
+    background: rgba(77, 182, 214, 0.1);
+  }
+  .line-patch-select-hunk.all,
+  .line-patch-select-hunk.some,
+  .line-patch-line-select[aria-pressed="true"] {
+    border-color: rgba(77, 182, 214, 0.78);
+    background: #238eb4;
+  }
+  .line-patch-select-hunk.some { background: rgba(35, 142, 180, 0.55); }
   .line-patch-hunk-head code {
     color: var(--color-accent);
     font-family: var(--font-mono);
@@ -3991,12 +4309,17 @@
 
   .line-patch-row {
     display: grid;
-    grid-template-columns: 22px minmax(max-content, 1fr);
+    grid-template-columns: 18px 38px 38px 22px minmax(max-content, 1fr);
     align-items: start;
     min-height: 22px;
-    padding: 1px 10px 1px 28px;
+    padding: 1px 10px 1px 8px;
     color: var(--color-ink-muted);
   }
+  .line-patch-row.selectable { cursor: default; }
+  .line-patch-row.selected {
+    box-shadow: inset 3px 0 0 rgba(77, 182, 214, 0.86);
+    filter: saturate(1.12) brightness(1.06);
+  }
   .line-patch-row.add {
     background: var(--code-add-bg);
     color: var(--code-add-text);
@@ -4013,12 +4336,26 @@
     text-align: center;
     user-select: none;
   }
+  .line-patch-line-select { align-self: center; }
+  .line-patch-line-select-placeholder { width: 16px; }
+  .line-patch-line-number {
+    padding-right: 7px;
+    color: var(--color-ink-faint);
+    font-size: 10px;
+    line-height: 20px;
+    text-align: right;
+    user-select: none;
+  }
   .line-patch-row.add .line-patch-prefix { color: var(--code-add-strong); }
   .line-patch-row.delete .line-patch-prefix { color: var(--code-delete-strong); }
   .line-patch-row code {
     white-space: pre;
     font-family: var(--font-mono);
   }
+  @media (max-width: 760px) {
+    .line-patch-selection-bar { align-items: stretch; flex-direction: column; }
+    .line-patch-selected-actions { justify-content: flex-start; flex-wrap: wrap; }
+  }
 
   .blame-body {
     min-height: 0;

src/lib/components/BranchPanel.svelte

@@ -1,5 +1,5 @@
 <script lang="ts">
-  import { Check, ChevronDown, ChevronRight, Folder, FolderOpen, GitBranch, GitMerge, Pencil, Plus, Tag as TagIcon, Trash2, Upload, X } from "@lucide/svelte";
+  import { Check, ChevronDown, ChevronRight, Folder, FolderOpen, GitBranch, GitMerge, HardDrive, Pencil, Plus, Tag as TagIcon, Trash2, Upload, X } from "@lucide/svelte";
   import type { GitBranch as GitBranchInfo, GitTag } from "../types";
 
   type BranchTreeNode = BranchFolderNode | BranchLeafNode;
@@ -58,6 +58,8 @@
     onCreateTag: (name: string, message: string) => void | Promise<void>;
     onDeleteTag: (tag: GitTag) => void | Promise<void>;
     onPushTag: (tag: GitTag) => void | Promise<void>;
+    onManageWorktrees: () => void;
+    onCreateWorktree: (branch: GitBranchInfo) => void | Promise<void>;
     collapsed?: boolean;
     onToggleCollapsed?: () => void;
   }
@@ -79,6 +81,8 @@
     onCreateTag = () => {},
     onDeleteTag = () => {},
     onPushTag = () => {},
+    onManageWorktrees = () => {},
+    onCreateWorktree = () => {},
     collapsed = false,
     onToggleCollapsed = () => {},
   }: Props = $props();
@@ -271,6 +275,13 @@
     if (branch.remote) await onDeleteRemoteBranch(branch); else await onDeleteBranch(branch);
   }
 
+  async function createContextWorktree() {
+    const branch = contextBranch;
+    closeBranchContextMenu();
+    if (!branch) return;
+    await onCreateWorktree(branch);
+  }
+
   async function checkoutContextBranch() {
     const branch = contextBranch;
     if (!branch || branch.current || isBusy) return;
@@ -400,8 +411,6 @@
     <!-- collapsed -->
   {:else if !hasRepository}
     <p class="blank-state">Open a repository to list branches.</p>
-  {:else if branches.length === 0 && tags.length === 0}
-    <p class="blank-state">No branches returned.</p>
   {:else}
     <div class="branch-list overflow-auto p-2 flex flex-col gap-0">
       {#if createOpen}
@@ -638,6 +647,21 @@
           {/if}
         {/if}
       </div>
+
+      <div class="branch-group">
+        <button
+          class="branch-group-toggle worktree-group-toggle"
+          type="button"
+          onclick={onManageWorktrees}
+          disabled={isBusy}
+          aria-haspopup="dialog"
+          title="Manage repository worktrees"
+        >
+          <HardDrive size={14} aria-hidden="true" />
+          <span>Worktrees</span>
+          <span class="branch-group-count">Manage</span>
+        </button>
+      </div>
     </div>
   {/if}
 
@@ -661,6 +685,10 @@
         <GitBranch size={14} aria-hidden="true" />
         Rebase current onto this
       </button>
+      <button type="button" role="menuitem" onclick={createContextWorktree} disabled={isBusy || contextBranch.remote || contextBranch.current}>
+        <HardDrive size={14} aria-hidden="true" />
+        Open in new worktree
+      </button>
       <div class="menu-separator" role="separator"></div>
       <button type="button" role="menuitem" onclick={renameContextBranch} disabled={isBusy || contextBranch.remote}>
         <Pencil size={14} aria-hidden="true" />

src/lib/components/DiscardConfirmDialog.svelte

@@ -5,7 +5,7 @@
   interface Props {
     files: GitFileStatus[];
     staged: boolean | null;
-    scope: "file" | "hunk";
+    scope: "file" | "hunk" | "lines";
     isBusy: boolean;
     onConfirm: () => void | Promise<void>;
     onClose: () => void;
@@ -26,9 +26,9 @@
 
   let count = $derived(files.length);
   let title = $derived(
-    scope === "hunk" ? "Discard hunk?" : count > 1 ? `Discard changes in ${count} files?` : "Discard file changes?"
+    scope === "hunk" ? "Discard hunk?" : scope === "lines" ? "Discard selected lines?" : count > 1 ? `Discard changes in ${count} files?` : "Discard file changes?"
   );
-  let scopeLabel = $derived(scope === "hunk" ? "selected hunk" : count > 1 ? `${count} files` : "file");
+  let scopeLabel = $derived(scope === "hunk" ? "selected hunk" : scope === "lines" ? "selected lines" : count > 1 ? `${count} files` : "file");
   let sourceLabel = $derived(staged === null ? "staged and unstaged changes" : staged ? "staged changes" : "unstaged changes");
 
 </script>

src/lib/components/LinePatchDialog.svelte

@@ -1,5 +1,5 @@
 <script lang="ts">
-  import { LoaderCircle, X } from "@lucide/svelte";
+  import { Check, LoaderCircle, MousePointer2, X } from "@lucide/svelte";
   import type { GitFileStatus, PatchApplyAction } from "../types";
 
   type PatchLineKind = "context" | "add" | "delete" | "meta";
@@ -8,12 +8,17 @@
     id: string;
     text: string;
     kind: PatchLineKind;
+    oldLine: number | null;
+    newLine: number | null;
   }
 
   interface PatchHunk {
     id: string;
     header: string;
     lines: PatchLine[];
+    oldStart: number;
+    newStart: number;
+    suffix: string;
   }
 
   interface ParsedPatch {
@@ -31,7 +36,7 @@
     error: string;
     onClose: () => void;
     onRefresh: () => void | Promise<void>;
-    onApply: (action: PatchApplyAction, patch: string) => void | Promise<void>;
+    onApply: (action: PatchApplyAction, patch: string, scope: "hunk" | "lines") => void | Promise<void>;
   }
 
   let {
@@ -48,12 +53,20 @@
 
   let parsed = $state<ParsedPatch>({ headerLines: [], hunks: [], binary: false });
   let patchScroll = $state<HTMLDivElement | null>(null);
+  let selectedLineIds = $state<Set<string>>(new Set());
+  let lastSelectedLineId = $state("");
 
   let scopeLabel = $derived(staged ? "Staged changes" : "Unstaged changes");
   let displayPath = $derived(file.old_path ? `${file.old_path} -> ${file.path}` : file.path);
+  let selectableLines = $derived(
+    parsed.hunks.flatMap((hunk) => hunk.lines.filter((line) => line.kind === "add" || line.kind === "delete")),
+  );
+  let selectedCount = $derived(selectableLines.filter((line) => selectedLineIds.has(line.id)).length);
 
   $effect(() => {
     parsed = parsePatch(patch);
+    selectedLineIds = new Set();
+    lastSelectedLineId = "";
   });
 
   function parsePatch(input: string): ParsedPatch {
@@ -64,10 +77,22 @@
     const headerLines: string[] = [];
     const hunks: PatchHunk[] = [];
     let current: PatchHunk | null = null;
+    let oldCursor = 0;
+    let newCursor = 0;
 
     for (const line of lines) {
       if (line.startsWith("@@ ")) {
-        current = { id: `hunk-${hunks.length}`, header: line, lines: [] };
+        const range = parseHunkHeader(line);
+        current = {
+          id: `hunk-${hunks.length}`,
+          header: line,
+          lines: [],
+          oldStart: range.oldStart,
+          newStart: range.newStart,
+          suffix: range.suffix,
+        };
+        oldCursor = range.oldStart;
+        newCursor = range.newStart;
         hunks.push(current);
         continue;
       }
@@ -78,11 +103,17 @@
       }
 
       const kind = patchLineKind(line);
+      const oldLine = kind === "context" || kind === "delete" ? oldCursor : null;
+      const newLine = kind === "context" || kind === "add" ? newCursor : null;
       current.lines.push({
         id: `${current.id}-line-${current.lines.length}`,
         text: line,
         kind,
+        oldLine,
+        newLine,
       });
+      if (oldLine !== null) oldCursor += 1;
+      if (newLine !== null) newCursor += 1;
     }
 
     return {
@@ -92,6 +123,15 @@
     };
   }
 
+  function parseHunkHeader(header: string): { oldStart: number; newStart: number; suffix: string } {
+    const match = header.match(/^@@ -(\d+)(?:,\d+)? \+(\d+)(?:,\d+)? @@(.*)$/);
+    return {
+      oldStart: Number(match?.[1] ?? 0),
+      newStart: Number(match?.[2] ?? 0),
+      suffix: match?.[3] ?? "",
+    };
+  }
+
   function patchLineKind(line: string): PatchLineKind {
     if (line.startsWith("+") && !line.startsWith("+++")) return "add";
     if (line.startsWith("-") && !line.startsWith("---")) return "delete";
@@ -117,7 +157,91 @@
 
   async function applyHunkAction(action: PatchApplyAction, hunk: PatchHunk) {
     if (isBusy || isLoading) return;
-    await onApply(action, buildHunkPatch(hunk));
+    await onApply(action, buildHunkPatch(hunk), "hunk");
+  }
+
+  function toggleLine(event: MouseEvent, line: PatchLine) {
+    if (isBusy || isLoading || (line.kind !== "add" && line.kind !== "delete")) return;
+    const next = new Set(selectedLineIds);
+    const selecting = !next.has(line.id);
+    if (event.shiftKey && lastSelectedLineId) {
+      const start = selectableLines.findIndex((candidate) => candidate.id === lastSelectedLineId);
+      const end = selectableLines.findIndex((candidate) => candidate.id === line.id);
+      if (start >= 0 && end >= 0) {
+        for (const candidate of selectableLines.slice(Math.min(start, end), Math.max(start, end) + 1)) {
+          if (selecting) next.add(candidate.id);
+          else next.delete(candidate.id);
+        }
+      }
+    } else if (selecting) {
+      next.add(line.id);
+    } else {
+      next.delete(line.id);
+    }
+    selectedLineIds = next;
+    lastSelectedLineId = line.id;
+  }
+
+  function toggleHunkSelection(hunk: PatchHunk) {
+    const changed = hunk.lines.filter((line) => line.kind === "add" || line.kind === "delete");
+    const allSelected = changed.length > 0 && changed.every((line) => selectedLineIds.has(line.id));
+    const next = new Set(selectedLineIds);
+    for (const line of changed) {
+      if (allSelected) next.delete(line.id);
+      else next.add(line.id);
+    }
+    selectedLineIds = next;
+    lastSelectedLineId = changed[changed.length - 1]?.id ?? "";
+  }
+
+  function hunkSelectionState(hunk: PatchHunk): "none" | "some" | "all" {
+    const changed = hunk.lines.filter((line) => line.kind === "add" || line.kind === "delete");
+    const count = changed.filter((line) => selectedLineIds.has(line.id)).length;
+    return count === 0 ? "none" : count === changed.length ? "all" : "some";
+  }
+
+  function rangePart(start: number, count: number): string {
+    return count === 1 ? `${start}` : `${start},${count}`;
+  }
+
+  function buildSelectedHunk(hunk: PatchHunk): string | null {
+    if (!hunk.lines.some((line) => selectedLineIds.has(line.id))) return null;
+    const output: string[] = [];
+    let previousIncluded = false;
+
+    for (const line of hunk.lines) {
+      if (line.kind === "context") {
+        output.push(line.text);
+        previousIncluded = true;
+      } else if (line.kind === "delete") {
+        output.push(selectedLineIds.has(line.id) ? line.text : ` ${line.text.slice(1)}`);
+        previousIncluded = true;
+      } else if (line.kind === "add") {
+        if (selectedLineIds.has(line.id)) {
+          output.push(line.text);
+          previousIncluded = true;
+        } else {
+          previousIncluded = false;
+        }
+      } else if (previousIncluded) {
+        output.push(line.text);
+      }
+    }
+
+    const oldCount = output.filter((line) => line.startsWith(" ") || line.startsWith("-")).length;
+    const newCount = output.filter((line) => line.startsWith(" ") || line.startsWith("+")).length;
+    const header = `@@ -${rangePart(hunk.oldStart, oldCount)} +${rangePart(hunk.newStart, newCount)} @@${hunk.suffix}`;
+    return [header, ...output].join("\n");
+  }
+
+  function buildSelectedPatch(): string {
+    const hunks = parsed.hunks.map(buildSelectedHunk).filter((hunk): hunk is string => Boolean(hunk));
+    return `${[...parsed.headerLines, ...hunks].join("\n")}\n`;
+  }
+
+  async function applySelected(action: PatchApplyAction) {
+    if (isBusy || isLoading || selectedCount === 0) return;
+    await onApply(action, buildSelectedPatch(), "lines");
   }
 
   function hunkPosition(index: number): number {
@@ -166,54 +290,106 @@
       {:else if parsed.binary || parsed.hunks.length === 0}
         <div class="blank-state">This change cannot be split into text lines.</div>
       {:else}
-        <div class="line-patch-workspace">
+        <div class:active={selectedCount > 0} class="line-patch-selection-bar">
-        <div class="line-patch-scroll" bind:this={patchScroll}>
+          <div>
-          {#each parsed.hunks as hunk (hunk.id)}
+            <MousePointer2 size={14} aria-hidden="true" />
-            <section class="line-patch-hunk" data-hunk-id={hunk.id}>
+            {#if selectedCount > 0}
-              <div class="line-patch-hunk-head">
+              <strong>{selectedCount} {selectedCount === 1 ? "line" : "lines"} selected</strong>
-                <code>{hunk.header}</code>
+              <span>Shift-click to select a range.</span>
-                <div class="line-patch-hunk-actions">
+            {:else}
-                  {#if staged}
+              <strong>Select changed lines</strong>
-                    <button class="line-patch-hunk-button discard" type="button" onclick={() => applyHunkAction("discard-staged", hunk)} disabled={isBusy}>
+              <span>Choose individual additions or deletions below.</span>
-                      Discard Hunk
+            {/if}
-                    </button>
+          </div>
-                    <button class="line-patch-hunk-button unstage" type="button" onclick={() => applyHunkAction("unstage", hunk)} disabled={isBusy}>
+          {#if selectedCount > 0}
-                      Unstage Hunk
+            <div class="line-patch-selected-actions">
-                    </button>
+              <button class="line-patch-hunk-button discard" type="button" onclick={() => applySelected(staged ? "discard-staged" : "discard-unstaged")} disabled={isBusy}>
-                  {:else}
+                Discard selected
-                    <button class="line-patch-hunk-button discard" type="button" onclick={() => applyHunkAction("discard-unstaged", hunk)} disabled={isBusy}>
+              </button>
-                      Discard Hunk
+              <button class="line-patch-hunk-button {staged ? "unstage" : "stage"}" type="button" onclick={() => applySelected(staged ? "unstage" : "stage")} disabled={isBusy}>
-                    </button>
+                {staged ? "Unstage selected" : "Stage selected"}
-                    <button class="line-patch-hunk-button stage" type="button" onclick={() => applyHunkAction("stage", hunk)} disabled={isBusy}>
+              </button>
-                      Stage Hunk
+              <button class="btn-sm" type="button" onclick={() => { selectedLineIds = new Set(); }} disabled={isBusy}>Clear</button>
-                    </button>
+            </div>
-                  {/if}
+          {/if}
-                </div>
-              </div>
-
-              <div class="line-patch-lines">
-                {#each hunk.lines as line (line.id)}
-                  <div class={`line-patch-row ${line.kind}`}>
-                    <span class="line-patch-prefix">{linePrefix(line)}</span>
-                    <code>{lineBody(line)}</code>
-                  </div>
-                {/each}
-              </div>
-            </section>
-          {/each}
         </div>
-        <nav class="diff-overview line-patch-overview" aria-label="Change overview">
+
-          {#each parsed.hunks as hunk, index (hunk.id)}
+        <div class="line-patch-workspace">
-            <button
+          <div class="line-patch-scroll" bind:this={patchScroll}>
-              class="diff-overview-marker {hunkKind(hunk)}"
+            {#each parsed.hunks as hunk (hunk.id)}
-              type="button"
+              <section class="line-patch-hunk" data-hunk-id={hunk.id}>
-              style={`--marker-position: ${hunkPosition(index)}%`}
+                <div class="line-patch-hunk-head">
-              onclick={() => scrollToHunk(hunk.id)}
+                  <button
-              title={`Jump to hunk ${index + 1} of ${parsed.hunks.length}`}
+                    class:all={hunkSelectionState(hunk) === "all"}
-              aria-label={`Jump to hunk ${index + 1} of ${parsed.hunks.length}`}
+                    class:some={hunkSelectionState(hunk) === "some"}
-            ></button>
+                    class="line-patch-select-hunk"
-          {/each}
+                    type="button"
-        </nav>
+                    onclick={() => toggleHunkSelection(hunk)}
+                    aria-label={`Select changed lines in ${hunk.header}`}
+                    aria-pressed={hunkSelectionState(hunk) === "all"}
+                    title="Select all changed lines in this hunk"
+                  >
+                    {#if hunkSelectionState(hunk) !== "none"}<Check size={12} aria-hidden="true" />{/if}
+                  </button>
+                  <code>{hunk.header}</code>
+                  <div class="line-patch-hunk-actions">
+                    {#if staged}
+                      <button class="line-patch-hunk-button discard" type="button" onclick={() => applyHunkAction("discard-staged", hunk)} disabled={isBusy}>
+                        Discard Hunk
+                      </button>
+                      <button class="line-patch-hunk-button unstage" type="button" onclick={() => applyHunkAction("unstage", hunk)} disabled={isBusy}>
+                        Unstage Hunk
+                      </button>
+                    {:else}
+                      <button class="line-patch-hunk-button discard" type="button" onclick={() => applyHunkAction("discard-unstaged", hunk)} disabled={isBusy}>
+                        Discard Hunk
+                      </button>
+                      <button class="line-patch-hunk-button stage" type="button" onclick={() => applyHunkAction("stage", hunk)} disabled={isBusy}>
+                        Stage Hunk
+                      </button>
+                    {/if}
+                  </div>
+                </div>
+
+                <div class="line-patch-lines">
+                  {#each hunk.lines as line (line.id)}
+                    <div class:selected={selectedLineIds.has(line.id)} class:selectable={line.kind === "add" || line.kind === "delete"} class={`line-patch-row ${line.kind}`}>
+                      {#if line.kind === "add" || line.kind === "delete"}
+                        <button
+                          class="line-patch-line-select"
+                          type="button"
+                          onclick={(event) => toggleLine(event, line)}
+                          aria-label={`${selectedLineIds.has(line.id) ? "Deselect" : "Select"} ${line.kind === "add" ? "added" : "deleted"} line ${line.newLine ?? line.oldLine ?? ""}`}
+                          aria-pressed={selectedLineIds.has(line.id)}
+                          title="Select line (Shift-click for range)"
+                        >
+                          {#if selectedLineIds.has(line.id)}<Check size={11} aria-hidden="true" />{/if}
+                        </button>
+                      {:else}
+                        <span class="line-patch-line-select-placeholder"></span>
+                      {/if}
+                      <span class="line-patch-line-number">{line.oldLine ?? ""}</span>
+                      <span class="line-patch-line-number">{line.newLine ?? ""}</span>
+                      <span class="line-patch-prefix">{linePrefix(line)}</span>
+                      <code>{lineBody(line)}</code>
+                    </div>
+                  {/each}
+                </div>
+              </section>
+            {/each}
+          </div>
+          <nav class="diff-overview line-patch-overview" aria-label="Change overview">
+            {#each parsed.hunks as hunk, index (hunk.id)}
+              <button
+                class="diff-overview-marker {hunkKind(hunk)}"
+                type="button"
+                style={`--marker-position: ${hunkPosition(index)}%`}
+                onclick={() => scrollToHunk(hunk.id)}
+                title={`Jump to hunk ${index + 1} of ${parsed.hunks.length}`}
+                aria-label={`Jump to hunk ${index + 1} of ${parsed.hunks.length}`}
+              ></button>
+            {/each}
+          </nav>
         </div>
       {/if}
     </div>

src/lib/components/WorktreeDialog.svelte

@@ -0,0 +1,455 @@
+<script lang="ts">
+  import { open as openDialog } from "@tauri-apps/plugin-dialog";
+  import {
+    AlertTriangle,
+    Check,
+    CircleDot,
+    ExternalLink,
+    FolderInput,
+    FolderOpen,
+    GitBranch,
+    HardDrive,
+    LoaderCircle,
+    Lock,
+    MapPin,
+    Plus,
+    RefreshCw,
+    ShieldCheck,
+    Trash2,
+    Unlock,
+    Wrench,
+    X,
+  } from "@lucide/svelte";
+  import type { GitBranch as GitBranchInfo, GitWorktree } from "../types";
+
+  type CreateMode = "existing" | "new" | "detached";
+
+  interface AddRequest {
+    worktreePath: string;
+    branch?: string;
+    newBranch?: string;
+    startPoint?: string;
+    detached?: boolean;
+    lock?: boolean;
+  }
+
+  interface Props {
+    worktrees: GitWorktree[];
+    branches: GitBranchInfo[];
+    initialBranch?: string;
+    isLoading: boolean;
+    isBusy: boolean;
+    error?: string;
+    onRefresh: () => void | Promise<void>;
+    onOpen: (worktree: GitWorktree) => void | Promise<void>;
+    onAdd: (request: AddRequest) => boolean | Promise<boolean>;
+    onRemove: (worktree: GitWorktree, force: boolean) => boolean | Promise<boolean>;
+    onMove: (worktree: GitWorktree, destination: string) => void | Promise<void>;
+    onLock: (worktree: GitWorktree, reason: string) => boolean | Promise<boolean>;
+    onUnlock: (worktree: GitWorktree) => void | Promise<void>;
+    onPrune: () => void | Promise<void>;
+    onRepair: (worktree: GitWorktree, location: string) => void | Promise<void>;
+    onClose: () => void;
+  }
+
+  let {
+    worktrees = [],
+    branches = [],
+    initialBranch = "",
+    isLoading = false,
+    isBusy = false,
+    error = "",
+    onRefresh = () => {},
+    onOpen = () => {},
+    onAdd = () => false,
+    onRemove = () => false,
+    onMove = () => {},
+    onLock = () => false,
+    onUnlock = () => {},
+    onPrune = () => {},
+    onRepair = () => {},
+    onClose = () => {},
+  }: Props = $props();
+
+  let createOpen = $state(false);
+  let createMode = $state<CreateMode>("new");
+  let selectedBranch = $state("");
+  let newBranch = $state("");
+  let startPoint = $state("HEAD");
+  let destination = $state("");
+  let lockAfterCreate = $state(false);
+  let pendingRemoval = $state<GitWorktree | null>(null);
+  let forceRemoval = $state(false);
+  let pendingLock = $state<GitWorktree | null>(null);
+  let lockReason = $state("");
+  let initialized = false;
+
+  $effect(() => {
+    if (initialized) return;
+    createOpen = initialBranch.length > 0;
+    createMode = initialBranch ? "existing" : "new";
+    selectedBranch = initialBranch;
+    initialized = true;
+  });
+
+  let localBranches = $derived(branches.filter((branch) => !branch.remote));
+  let prunableCount = $derived(worktrees.filter((worktree) => worktree.prunable).length);
+  let linkedCount = $derived(Math.max(0, worktrees.length - 1));
+  let checkedOutBranches = $derived(new Set(worktrees.map((worktree) => worktree.branch).filter((branch): branch is string => Boolean(branch))));
+
+  function displayName(worktree: GitWorktree): string {
+    return worktree.branch || (worktree.detached ? `Detached at ${worktree.short_head || "HEAD"}` : "Bare worktree");
+  }
+
+  function pathName(path: string): string {
+    return path.split(/[\\/]/).filter(Boolean).pop() || path;
+  }
+
+  function branchAvailable(branch: string): boolean {
+    return !checkedOutBranches.has(branch);
+  }
+
+  function joinPath(parent: string, name: string): string {
+    const separator = parent.includes("\\") ? "\\" : "/";
+    return `${parent.replace(/[\\/]+$/, "")}${separator}${name}`;
+  }
+
+  async function chooseDestination(current = "") {
+    const selected = await openDialog({
+      title: current ? "Choose new worktree location" : "Choose worktree folder",
+      directory: true,
+      multiple: false,
+      defaultPath: current || undefined,
+    });
+    if (typeof selected === "string") destination = selected;
+  }
+
+  async function submitCreate(event: SubmitEvent) {
+    event.preventDefault();
+    if (!destination.trim()) return;
+    const request: AddRequest = {
+      worktreePath: destination.trim(),
+      lock: lockAfterCreate,
+    };
+    if (createMode === "existing") request.branch = selectedBranch;
+    if (createMode === "new") {
+      request.newBranch = newBranch.trim();
+      request.startPoint = startPoint.trim() || "HEAD";
+    }
+    if (createMode === "detached") {
+      request.detached = true;
+      request.startPoint = startPoint.trim() || "HEAD";
+    }
+    if (await onAdd(request)) {
+      createOpen = false;
+      destination = "";
+      newBranch = "";
+    }
+  }
+
+  async function chooseMoveDestination(worktree: GitWorktree) {
+    const selected = await openDialog({
+      title: `Choose parent folder for ${displayName(worktree)}`,
+      directory: true,
+      multiple: false,
+      defaultPath: worktree.path,
+    });
+    if (typeof selected === "string") {
+      const target = joinPath(selected, pathName(worktree.path));
+      if (target !== worktree.path) await onMove(worktree, target);
+    }
+  }
+
+  async function chooseRepairLocation(worktree: GitWorktree) {
+    const selected = await openDialog({
+      title: `Locate ${displayName(worktree)}`,
+      directory: true,
+      multiple: false,
+    });
+    if (typeof selected === "string") await onRepair(worktree, selected);
+  }
+
+  function requestRemoval(worktree: GitWorktree) {
+    pendingRemoval = worktree;
+    forceRemoval = false;
+  }
+
+  async function confirmRemoval() {
+    if (!pendingRemoval) return;
+    if (await onRemove(pendingRemoval, forceRemoval)) {
+      pendingRemoval = null;
+      forceRemoval = false;
+    }
+  }
+
+  function requestLock(worktree: GitWorktree) {
+    pendingLock = worktree;
+    lockReason = "";
+  }
+
+  async function confirmLock() {
+    if (!pendingLock) return;
+    if (await onLock(pendingLock, lockReason)) {
+      pendingLock = null;
+      lockReason = "";
+    }
+  }
+</script>
+
+<div class="dialog-backdrop" role="presentation">
+  <div class="dialog worktree-dialog" role="dialog" aria-modal="true" aria-labelledby="worktree-dialog-title">
+    <header class="dialog-header worktree-dialog-header">
+      <div class="worktree-dialog-heading">
+        <span class="worktree-dialog-mark" aria-hidden="true"><HardDrive size={18} /></span>
+        <div>
+          <span class="eyebrow">Parallel workspaces</span>
+          <p class="dialog-title" id="worktree-dialog-title">Worktrees</p>
+        </div>
+      </div>
+      <div class="dialog-header-actions">
+        <button class="btn-sm" type="button" onclick={onRefresh} disabled={isBusy || isLoading} title="Refresh worktrees">
+          <RefreshCw class={isLoading ? "spin" : undefined} size={15} aria-hidden="true" />
+          Refresh
+        </button>
+        <button class="btn-sm dialog-close" type="button" onclick={onClose} disabled={isBusy} aria-label="Close">
+          <X size={16} aria-hidden="true" />
+        </button>
+      </div>
+    </header>
+
+    <div class="worktree-summary">
+      <div><strong>{linkedCount}</strong><span>linked worktrees</span></div>
+      <div><strong>{worktrees.filter((worktree) => !worktree.clean).length}</strong><span>with changes</span></div>
+      <div class:attention={prunableCount > 0}><strong>{prunableCount}</strong><span>stale entries</span></div>
+      <button class="btn-primary" type="button" onclick={() => { createOpen = !createOpen; }} disabled={isBusy}>
+        <Plus size={15} aria-hidden="true" />
+        New worktree
+      </button>
+    </div>
+
+    {#if error}
+      <div class="worktree-error" role="alert"><AlertTriangle size={15} aria-hidden="true" />{error}</div>
+    {/if}
+
+    <div class="worktree-content">
+      {#if createOpen}
+        <form class="worktree-create-card" onsubmit={submitCreate}>
+          <header>
+            <div>
+              <span class="eyebrow">Create</span>
+              <h3>Choose what this workspace should track</h3>
+            </div>
+            <button class="btn-sm dialog-close" type="button" onclick={() => { createOpen = false; }} disabled={isBusy} aria-label="Close create form">
+              <X size={15} aria-hidden="true" />
+            </button>
+          </header>
+
+          <div class="worktree-mode-tabs" role="tablist" aria-label="Worktree type">
+            <button class:active={createMode === "existing"} type="button" role="tab" aria-selected={createMode === "existing"} onclick={() => { createMode = "existing"; }}>
+              <GitBranch size={14} aria-hidden="true" />Existing branch
+            </button>
+            <button class:active={createMode === "new"} type="button" role="tab" aria-selected={createMode === "new"} onclick={() => { createMode = "new"; }}>
+              <Plus size={14} aria-hidden="true" />New branch
+            </button>
+            <button class:active={createMode === "detached"} type="button" role="tab" aria-selected={createMode === "detached"} onclick={() => { createMode = "detached"; }}>
+              <CircleDot size={14} aria-hidden="true" />Detached
+            </button>
+          </div>
+
+          <div class="worktree-create-fields">
+            {#if createMode === "existing"}
+              <label>
+                <span>Branch</span>
+                <select bind:value={selectedBranch} disabled={isBusy}>
+                  <option value="" disabled>Select a local branch</option>
+                  {#each localBranches as branch (branch.name)}
+                    <option value={branch.name} disabled={!branchAvailable(branch.name)}>{branch.name}{!branchAvailable(branch.name) ? " (already checked out)" : ""}</option>
+                  {/each}
+                </select>
+              </label>
+            {:else if createMode === "new"}
+              <label>
+                <span>New branch name</span>
+                <input bind:value={newBranch} disabled={isBusy} autocomplete="off" spellcheck="false" placeholder="feature/my-change" />
+              </label>
+              <label>
+                <span>Start point</span>
+                <input bind:value={startPoint} disabled={isBusy} autocomplete="off" spellcheck="false" placeholder="HEAD, branch or commit" />
+              </label>
+            {:else}
+              <label>
+                <span>Commit or ref</span>
+                <input bind:value={startPoint} disabled={isBusy} autocomplete="off" spellcheck="false" placeholder="HEAD" />
+              </label>
+            {/if}
+
+            <label class="worktree-path-field">
+              <span>Folder</span>
+              <div>
+                <input bind:value={destination} disabled={isBusy} autocomplete="off" spellcheck="false" placeholder="Choose an empty folder" />
+                <button class="btn-secondary" type="button" onclick={() => chooseDestination()} disabled={isBusy}>
+                  <FolderOpen size={15} aria-hidden="true" />Browse
+                </button>
+              </div>
+            </label>
+          </div>
+
+          <footer>
+            <label class="worktree-check">
+              <input type="checkbox" bind:checked={lockAfterCreate} disabled={isBusy} />
+              <span><strong>Lock after creation</strong><small>Protects removable or temporary locations from pruning.</small></span>
+            </label>
+            <button
+              class="btn-primary"
+              type="submit"
+              disabled={isBusy || !destination.trim() || (createMode === "existing" && (!selectedBranch || !branchAvailable(selectedBranch))) || (createMode === "new" && !newBranch.trim())}
+            >
+              {#if isBusy}<LoaderCircle class="spin" size={15} aria-hidden="true" />{:else}<Plus size={15} aria-hidden="true" />{/if}
+              Create worktree
+            </button>
+          </footer>
+        </form>
+      {/if}
+
+      {#if isLoading && worktrees.length === 0}
+        <div class="worktree-loading"><LoaderCircle class="spin" size={22} aria-hidden="true" /><span>Reading worktrees…</span></div>
+      {:else if worktrees.length === 0}
+        <div class="worktree-empty"><HardDrive size={24} aria-hidden="true" /><strong>No worktrees found</strong><span>Create one to work on another branch without switching this workspace.</span></div>
+      {:else}
+        <div class="worktree-list">
+          {#each worktrees as worktree (worktree.path)}
+            <article class:current={worktree.is_current} class:stale={worktree.prunable || worktree.missing} class="worktree-card">
+              <div class="worktree-rail" aria-hidden="true">
+                <span></span>
+                {#if !worktree.is_main}<i></i>{/if}
+              </div>
+              <div class="worktree-card-main">
+                <header>
+                  <div class="worktree-name">
+                    <GitBranch size={16} aria-hidden="true" />
+                    <div>
+                      <strong>{displayName(worktree)}</strong>
+                      <span>{pathName(worktree.path)}</span>
+                    </div>
+                  </div>
+                  <div class="worktree-badges">
+                    {#if worktree.is_main}<span>Main</span>{/if}
+                    {#if worktree.is_current}<span class="active">Open</span>{/if}
+                    {#if worktree.detached}<span>Detached</span>{/if}
+                    {#if worktree.locked}<span class="locked"><Lock size={10} aria-hidden="true" />Locked</span>{/if}
+                    {#if worktree.prunable || worktree.missing}<span class="danger">Stale</span>{/if}
+                  </div>
+                </header>
+
+                <div class="worktree-path" title={worktree.path}><MapPin size={13} aria-hidden="true" /><code>{worktree.path}</code></div>
+
+                <div class="worktree-meta">
+                  <span class:dirty={!worktree.clean}>
+                    {#if worktree.clean}<Check size={12} aria-hidden="true" />Clean{:else}<CircleDot size={12} aria-hidden="true" />{worktree.changed_files} changed{/if}
+                  </span>
+                  {#if worktree.short_head}<span><code>{worktree.short_head}</code></span>{/if}
+                  {#if worktree.lock_reason}<span><Lock size={12} aria-hidden="true" />{worktree.lock_reason}</span>{/if}
+                  {#if worktree.prune_reason}<span class="danger"><AlertTriangle size={12} aria-hidden="true" />{worktree.prune_reason}</span>{/if}
+                </div>
+
+                <footer>
+                  <button class="btn-secondary" type="button" onclick={() => onOpen(worktree)} disabled={isBusy || worktree.missing || worktree.bare}>
+                    <ExternalLink size={14} aria-hidden="true" />{worktree.is_current ? "Refresh tab" : "Open tab"}
+                  </button>
+                  <div class="worktree-card-actions">
+                    {#if worktree.prunable}
+                      <button class="btn-sm" type="button" onclick={() => chooseRepairLocation(worktree)} disabled={isBusy} title="Locate and repair worktree">
+                        <Wrench size={14} aria-hidden="true" />Repair
+                      </button>
+                    {/if}
+                    {#if !worktree.is_main && !worktree.missing}
+                      <button class="btn-sm" type="button" onclick={() => chooseMoveDestination(worktree)} disabled={isBusy || worktree.locked || worktree.is_current} title="Move worktree">
+                        <FolderInput size={14} aria-hidden="true" />Move
+                      </button>
+                    {/if}
+                    {#if worktree.locked}
+                      <button class="btn-sm" type="button" onclick={() => onUnlock(worktree)} disabled={isBusy} title="Unlock worktree">
+                        <Unlock size={14} aria-hidden="true" />Unlock
+                      </button>
+                    {:else if !worktree.is_main}
+                      <button class="btn-sm" type="button" onclick={() => requestLock(worktree)} disabled={isBusy} title="Lock worktree">
+                        <Lock size={14} aria-hidden="true" />Lock
+                      </button>
+                    {/if}
+                    {#if !worktree.is_main}
+                      <button class="btn-sm danger" type="button" onclick={() => requestRemoval(worktree)} disabled={isBusy || worktree.is_current || worktree.locked || worktree.missing} title={worktree.missing ? "Use Prune to remove stale metadata" : "Remove worktree"}>
+                        <Trash2 size={14} aria-hidden="true" />Remove
+                      </button>
+                    {/if}
+                  </div>
+                </footer>
+              </div>
+            </article>
+          {/each}
+        </div>
+      {/if}
+    </div>
+
+    <footer class="worktree-dialog-footer">
+      <div><ShieldCheck size={14} aria-hidden="true" /><span>Dirty, active and locked worktrees are protected.</span></div>
+      <button class="btn-secondary" type="button" onclick={onPrune} disabled={isBusy || prunableCount === 0}>
+        <Wrench size={14} aria-hidden="true" />Prune {prunableCount || ""}
+      </button>
+    </footer>
+  </div>
+</div>
+
+{#if pendingRemoval}
+  <div class="dialog-backdrop worktree-nested-backdrop" role="presentation">
+    <div class="dialog worktree-confirm-dialog" role="alertdialog" aria-modal="true" aria-labelledby="worktree-remove-title">
+      <header class="dialog-header">
+        <div>
+          <span class="eyebrow">Remove worktree</span>
+          <p class="dialog-title" id="worktree-remove-title">Remove {displayName(pendingRemoval)}?</p>
+        </div>
+      </header>
+      <div class="worktree-confirm-body">
+        <span class="discard-warning-icon" aria-hidden="true"><AlertTriangle size={21} /></span>
+        <div>
+          <p>This removes the worktree folder and its Git registration. The branch itself is kept.</p>
+          <code>{pendingRemoval.path}</code>
+          {#if !pendingRemoval.clean}
+            <label class="worktree-check danger">
+              <input type="checkbox" bind:checked={forceRemoval} disabled={isBusy} />
+              <span><strong>Remove despite local changes</strong><small>{pendingRemoval.changed_files} changed files may be permanently deleted.</small></span>
+            </label>
+          {/if}
+        </div>
+      </div>
+      <footer class="discard-confirm-actions">
+        <button class="btn-secondary" type="button" onclick={() => { pendingRemoval = null; }} disabled={isBusy}>Cancel</button>
+        <button class="btn-danger" type="button" onclick={confirmRemoval} disabled={isBusy || (!pendingRemoval.clean && !forceRemoval)}>
+          <Trash2 size={15} aria-hidden="true" />Remove worktree
+        </button>
+      </footer>
+    </div>
+  </div>
+{/if}
+
+{#if pendingLock}
+  <div class="dialog-backdrop worktree-nested-backdrop" role="presentation">
+    <div class="dialog worktree-confirm-dialog" role="dialog" aria-modal="true" aria-labelledby="worktree-lock-title">
+      <header class="dialog-header">
+        <div>
+          <span class="eyebrow">Protect worktree</span>
+          <p class="dialog-title" id="worktree-lock-title">Lock {displayName(pendingLock)}</p>
+        </div>
+      </header>
+      <div class="worktree-lock-body">
+        <label>
+          <span>Reason <small>optional</small></span>
+          <input bind:value={lockReason} disabled={isBusy} autocomplete="off" placeholder="External drive, long-running work…" />
+        </label>
+      </div>
+      <footer class="discard-confirm-actions">
+        <button class="btn-secondary" type="button" onclick={() => { pendingLock = null; }} disabled={isBusy}>Cancel</button>
+        <button class="btn-primary" type="button" onclick={confirmLock} disabled={isBusy}><Lock size={15} aria-hidden="true" />Lock</button>
+      </footer>
+    </div>
+  </div>
+{/if}

src/lib/git.ts

@@ -21,6 +21,7 @@ import type {
   GitStash,
   GitStatus,
   GitTag,
+  GitWorktree,
   LocalModelOption,
   PatchApplyAction,
   RepositoryBundle,
@@ -116,6 +117,56 @@ export function deleteBranch(path: string, branch: string, force = false): Promi
   return invoke<GitStatus>("delete_branch", { path, branch, force });
 }
 
+export function listWorktrees(path: string): Promise<GitWorktree[]> {
+  return invoke<GitWorktree[]>("list_worktrees", { path });
+}
+
+export function addWorktree(
+  path: string,
+  worktreePath: string,
+  options: {
+    branch?: string;
+    newBranch?: string;
+    startPoint?: string;
+    detached?: boolean;
+    lock?: boolean;
+  } = {},
+): Promise<GitWorktree[]> {
+  return invoke<GitWorktree[]>("add_worktree", {
+    path,
+    worktreePath,
+    branch: options.branch ?? null,
+    newBranch: options.newBranch ?? null,
+    startPoint: options.startPoint ?? null,
+    detached: options.detached ?? false,
+    lock: options.lock ?? false,
+  });
+}
+
+export function removeWorktree(path: string, worktreePath: string, force = false): Promise<GitWorktree[]> {
+  return invoke<GitWorktree[]>("remove_worktree", { path, worktreePath, force });
+}
+
+export function moveWorktree(path: string, worktreePath: string, destination: string): Promise<GitWorktree[]> {
+  return invoke<GitWorktree[]>("move_worktree", { path, worktreePath, destination });
+}
+
+export function lockWorktree(path: string, worktreePath: string, reason?: string): Promise<GitWorktree[]> {
+  return invoke<GitWorktree[]>("lock_worktree", { path, worktreePath, reason: reason?.trim() || null });
+}
+
+export function unlockWorktree(path: string, worktreePath: string): Promise<GitWorktree[]> {
+  return invoke<GitWorktree[]>("unlock_worktree", { path, worktreePath });
+}
+
+export function pruneWorktrees(path: string): Promise<GitWorktree[]> {
+  return invoke<GitWorktree[]>("prune_worktrees", { path });
+}
+
+export function repairWorktree(path: string, worktreePath: string): Promise<GitWorktree[]> {
+  return invoke<GitWorktree[]>("repair_worktree", { path, worktreePath });
+}
+
 export function listTags(path: string): Promise<GitTag[]> {
   return invoke<GitTag[]>("list_tags", { path });
 }

src/lib/types.ts

@@ -90,6 +90,24 @@ export interface GitBranch {
   remote: boolean;
 }
 
+export interface GitWorktree {
+  path: string;
+  head: string | null;
+  short_head: string | null;
+  branch: string | null;
+  bare: boolean;
+  detached: boolean;
+  locked: boolean;
+  lock_reason: string | null;
+  prunable: boolean;
+  prune_reason: string | null;
+  missing: boolean;
+  is_main: boolean;
+  is_current: boolean;
+  clean: boolean;
+  changed_files: number;
+}
+
 export interface GitTag {
   name: string;
   hash: string;