worktree-mgr

简体中文

A plugin that provides task-isolated workspaces for dsh (DeepSeek Harness, a plugin-based harness running on the Cordis plugin framework).

When a model processes multiple tasks in parallel, each task is completed in its own git workspace (git worktree) on its own branch, without polluting the main workspace; when the task ends, the plugin commits, merges, and cleans up automatically. The full lifecycle — create / sync / overview / finish / batch cleanup — is covered by 5 tools + 1 CLI, with zero manual git operations throughout.

Core Concepts

Features

• Task-driven: give the model a task name and the branch name, path, and ledger record are all generated automatically — no need to specify a branch
• Branch name safety: task name → slug normalization (illegal forms such as .. within a segment, .lock suffix, leading dots in a segment are fixed at the source), with dual ref-validity checks; creation is rejected when different tasks derive the same slug
• Uncommitted change detection: merge is refused when the base branch is dirty (prevents mixing in unfinished work); uncommitted changes in the task workspace trigger an automatic snapshot commit by default
• Merge target consistency: before merging, the plugin validates "main workspace current branch == ledger base branch" and "task workspace current branch == ledger task branch"; any mismatch is refused — eliminating the silent error of reporting success while changes land on the wrong branch
• Sync and finish separated: wtm_merge only merges without cleanup, while wtm_finish commits → merges → deletes workspace → deletes branch → clears the record; retry scenarios automatically skip already-completed merges (no duplicate empty merge commits)
• Batch cleanup: wtm_purge finishes multiple tasks at once; a single task failure does not interrupt the rest, and any failure yields a non-zero exit code
• Repository-level configuration: <repo-root>/.wtm.json supports branch prefixes, message templates, seed files (with path-escape protection), and lifecycle triggers (fixed working directory)
• Concurrency safety: ledger writes hold a mutex — the lock contains a unique token with heartbeat refresh, stale locks are reclaimed only after a process crash, and release never mistakenly deletes a successor's lock
• Failure recovery: a failed create rolls back the created worktree and branch automatically; merge conflicts provide a git merge --abort recovery guide
• Cross-platform: triggers execute on Windows (cmd) and POSIX (sh); path comparison normalizes case and separators
• Zero dependencies, no build: pure Node ESM, node >= 21 is enough — install and use

Installing in DSH

Install the latest version into a profile from GitHub:

dsh plugin --profile demo add github:JohnXu22786/worktree-mgr

Remove it:

dsh plugin --profile demo remove worktree-mgr

Option 1: install as a dsh bundle (recommended)

From a directory containing this package:

dsh plugin --profile demo add ./worktree-mgr

• package.json declares dsh.bundle.patch → cordis.patch.yml, so dsh automatically inserts the plugin line into the profile's configuration layer;
• That layer defaults to root: !!js process.cwd() (the dsh startup directory as the main repository), overridable as needed;
• This package is pure JavaScript with no build step, so installing from git never misses build artifacts.

Option 2: overlay loading (without installing into a profile)

dsh --profile demo --patch ./examples/overlay.yml

overlay.yml shares the same structure as the plugin line configuration, suitable for temporary mounting or configuration tweaks.

Option 3: standalone CLI

npm link            # or node bin/wtm.js ...
wtm begin "Add Search Box"

Quick Start

# 1. Create an isolated workspace for the task (auto-derives branch wtm/add-search-box)
wtm begin "Add Search Box"

# 2. Edit code freely inside <vault>/add-search-box
#    (or let the model work inside the task workspace directory)

# 3. View the status of all tasks (dirty/ahead/behind)
wtm status

# 4. Sync only, without finishing: merge task changes back to the base branch, keeping the workspace
wtm merge "Add Search Box"

# 5. Finish: snapshot commit → merge → remove workspace → delete branch → clear ledger
wtm finish "Add Search Box"

# 6. Batch finish
wtm purge "Task A" "Task B"      # specified tasks
wtm purge --all                  # all tasks

All commands support --json for structured output, making them easy to consume from scripts and the harness.

CLI Reference

bin/wtm.js runs standalone (wtm after npm link, or node bin/wtm.js); every subcommand accepts --json for structured output on stdout.

Exit codes: 0 success; 1 operation failure (with --json the failure lives in the JSON payload, and any failed sub-result of purge also yields 1); 2 usage errors (unknown or missing command). The WTM_* environment variables apply to the CLI as well.

Tool Interface (Model-Facing)

mode semantics

• commit (default): first snapshot-commit the uncommitted changes in the task workspace, then merge back to the base branch, then clean up
• refuse: refuse directly when the task workspace has uncommitted changes (only wtm_merge)
• abandon: discard all task changes, force-clean the workspace and delete the branch (irrecoverable, use with care)
• keep: only release management; workspace and branch remain untouched (only wtm_finish)

Safety boundaries (identical for tools and CLI):

• Base branch workspace has uncommitted changes → merge refused (wtm_merge / wtm_finish in commit mode)
• Main workspace current branch ≠ ledger base branch, or task workspace current branch ≠ ledger record → operation refused (prevents changes landing on the wrong branch)
• Task branch already exists, task already registered, workspace directory already exists, or different tasks deriving the same workspace path → creation refused
• Illegal task or branch name (git ref rules) → refused before any git operation
• Seed file path escapes (../x escaping the repo/workspace) → intercepted with a warning
• Call cancelled (exec.signal abort) → clean return; a failed create rolls back created worktrees and branches automatically

Plugin Integration Notes (how the harness loads it)

This plugin follows dsh's standard plugin protocol, consisting of three pieces:

worktree-mgr/
├── package.json        # ① dsh.bundle manifest: declares this package as a configuration layer
├── cordis.patch.yml    # ② Configuration layer content: inserts the plugin line into the profile
├── index.js            # ③ Entry module: exports name / inject / apply
└── src/                # Implementation: naming/config/vault/git/triggers/ops/tools

① Bundle manifest (package.json):

{
  "name": "worktree-mgr",
  "type": "module",
  "main": "index.js",
  "dsh": { "bundle": { "patch": "./cordis.patch.yml" } }
}

② Configuration layer (cordis.patch.yml):

- insert:
    - id: worktree-mgr
      name: worktree-mgr        # resolved by package name; Node module resolution finds index.js
      config:
        root: !!js process.cwd()

③ Entry module (index.js) exports:

export const name = 'worktree-mgr'
export const inject = ['tools']              // declares dependency on the tools registry
export function apply(ctx, config = {}) {
  ctx.tools.register(...)                    // registers the 5 tools
}

Loading order: profile assembly → this bundle's patch layer inserts the plugin line → the loader waits for the tools service → calls apply(ctx, config) → tool schemas flow into the system prompt automatically, and the model can invoke them.

Tool definition shape (consistent with dsh tool conventions):

{
  name: 'wtm_status',
  description: '...',                        // model-visible description
  parameters: {                              // flat property table; required: true means mandatory
    root: { type: 'string', description: 'repository path' }
  },
  output: {
    schema: { type: 'object', properties: { ok: { type: 'boolean', required: true }, ... } },
    render: (args, value) => [{ type: 'text', text: '...' }]   // model-visible content
  },
  async execute(args, exec) { ... }          // returns canonical JSON; exec.signal supports cancellation
}

Events/hooks interface: the plugin itself does not subscribe to harness events; lifecycle extensions go through triggers in the repository-level configuration — at the on_begin / on_merge / on_finish nodes, repo-configured shell commands run with WTM_TASK / WTM_BRANCH / WTM_BASE / WTM_PATH / WTM_ROOT environment variables injected. Triggers have fixed working directories: on_begin runs inside the new workspace, on_merge / on_finish run at the main repository root. Trigger failures only log warnings and never interrupt the main flow.

Configuration

Precedence (low → high): *built-in defaults < plugin line config < repo .wtm.json < environment variables `WTM_`**

Environment variables: WTM_ROOT (effective for both tools and CLI), WTM_VAULT, WTM_PREFIX, WTM_COMMIT_MESSAGE, WTM_MERGE_MESSAGE (WTM_ROOT has lower precedence than tool parameters and plugin config).

Repository-level config <repo-root>/.wtm.json

{
  "prefix": "wtm",
  "vault": "D:/wtm-vaults",
  "commitMessage": "chore(wtm): snapshot {task}",
  "mergeMessage": "merge(wtm): fold {task} into {base}",
  "seed": { "files": ["docs/AGENTS.md"] },
  "triggers": {
    "on_begin": ["pnpm install"],
    "on_merge": ["pnpm lint"],
    "on_finish": []
  }
}

• vault must be outside the repository working tree (otherwise the vault directory would keep dirtying the main workspace, and the plugin refuses outright);
• seed.files: files copied from the main repository into the workspace when the task workspace is created (e.g. team convention docs); paths must stay within the repo/workspace — out-of-bounds entries are intercepted with a warning;
• triggers.*: lifecycle hook command arrays, see "Events/hooks interface" above.

Unknown keys produce a warning and are ignored; a corrupted .wtm.json never blocks operations, only warns.

Security Notes (Important)

• Repository config is code: .wtm.json's seed.files copies files from the repo into workspaces, and triggers.* runs arbitrary shell commands with your user's privileges. Only enable this plugin in trusted repositories — when cloning and operating on untrusted repositories, a repo-supplied .wtm.json is equivalent to granting it your execution permissions. Leave seed/triggers empty when you don't need this capability.
• Snapshot commits include untracked files: when the task workspace is dirty, the default snapshot git add -A commits everything (including untracked files such as build artifacts). To keep large directories out of history, maintain a .gitignore in the task workspace, or handle it manually with refuse mode.
• abandon is irrecoverable: wtm_finish --mode abandon and batch wtm_purge force-delete workspaces and delete task branches (-D); changes there cannot be recovered, so only use them when you have confirmed the discard.

Ledger and Concurrency

• Ledger: <vault>/index.json, {version: 1, records: [{task, branch, base, path, createdAt, updatedAt, note?}]}
• Writes are atomic (temp file + rename) and hold a .lock mutex for the entire operation;
• The lock contains a unique holder token with a 30s heartbeat refresh: after a process crash, a lock older than 5 minutes is deemed stale and reclaimed; release validates the token so a successor's lock is never mistakenly deleted; the wait timeout defaults to 5 seconds.

Development and Testing

npm test          # node --test, zero third-party dependencies
npm run typecheck # optional: requires dev-installed typescript + @types/node

Test coverage: naming rules, config merging, ledger (atomic writes/lock/stale reclamation/corruption recovery), git output parsing, triggers, lifecycle orchestration (fake git injection), tool schemas, plus integration tests against real git (full begin → modify files → status → finish chain).

Directory Structure

worktree-mgr/
├── package.json          # bundle manifest + metadata
├── cordis.patch.yml      # plugin configuration layer
├── index.js              # dsh plugin entry (name/inject/apply)
├── bin/wtm.js            # standalone CLI
├── README.md             # documentation (EN)
├── README.zh.md          # documentation (ZH)
├── LICENSE               # MIT license
├── src/
│   ├── naming.js         # task name → branch mapping and ref validation
│   ├── config.js         # config merging and template rendering
│   ├── vault.js          # ledger persistence (atomic writes/lock)
│   ├── git.js            # git execution layer and output parsing
│   ├── triggers.js       # lifecycle triggers
│   ├── ops.js            # lifecycle orchestration (begin/merge/finish/status/purge)
│   └── tools.js          # dsh tool definitions
├── examples/
│   ├── .wtm.json.example # repository config example
│   └── overlay.yml       # dsh overlay example
└── tests/                # node:test unit + integration tests

License

MIT — see LICENSE.