dsh-codeact-tools

Self-contained minimal AI coding tool set for DeepSeek Harness:

The shared persistent-shell machinery (marker-based output capture, scrollback assembly, session reset, per-owner serialization) is vendored in @dsh-codeact-tools/persistent-shell, adapted from @deepseek-ai/dsh-tool-bash-persistent (DeepSeek Harness, MIT). The editor is forked from @deepseek-ai/dsh-tool-str-replace-editor with undo_edit added. All tool packages depend only on the already-published harness core (@deepseek-ai/dsh-tools, dsh-terminal, dsh-agent, dsh-timeout, dsh-agent-loop, … at 0.1.0-rc.8) — nothing unpublished — so this repo is installable on its own.

The tool schemas and descriptions are pinned against the reference CodeAct tool set in tools.json by tests/schema-parity.spec.ts. The only documented divergence is the reference execute_bash is_input mode (sending input to a still-running process), which is deferred; the shipped description does not advertise it.

Packages

• @dsh-codeact-tools/persistent-shell — shared core: registerPersistentShellTool, resolvePersistentBashConfig, persistentShellConfigSchema.
• @dsh-codeact-tools/tool-str-replace-editor — the file editor with undo_edit (str_replace/insert history is recorded per owner and path).
• @dsh-codeact-tools/tool-execute-bash — registers the execute_bash tool.
• @dsh-codeact-tools/tool-finish — registers the finish tool; a successful call carries the concludesTurn terminal marker, so the agent loop commits the result and ends the turn without another model request.

Develop

pnpm install
pnpm build       # tsc -b, emits lib/ per package
pnpm test        # vitest: tool specs + tools.json schema-parity gate

Install

Two paths, both from this repository:

Local (no registry needed)

pnpm install
pnpm build
pnpm run install-mode    # copies the mode preset + installs the tool packages
pnpm run install-mode -- --link   # live developing: symlink preset + packages into the repo

Then start a session and pick the CodeAct Mode agent preset (or set agent-presets.default in settings). The installer backs up an existing codeact mode before replacing it; with --link, rebuilding in the repo (pnpm build) pushes changes to the deployment immediately.

Published bundle

The repo ships @dsh-codeact-tools/codeact (bundle/): a profile bundle whose dependencies pull the tool packages into a deployment, whose preset/ holds the mode, and whose dsh-codeact-install bin installs it. After pnpm publish:

{
  "dsh": { "profile": { "bundles": ["@dsh-codeact-tools/codeact"] } }
}

pnpm install
pnpm dlx dsh-codeact-install

Composition for reference (the mode itself lives in bundle/preset/agent.cordis.yml):

- id: execute-bash
  name: '@dsh-codeact-tools/tool-execute-bash'
  config:
    timeoutMs: 300000

- id: finish
  name: '@dsh-codeact-tools/tool-finish'

- id: str-replace-editor
  name: '@dsh-codeact-tools/tool-str-replace-editor'

execute_bash requires an owning Agent, a real PTY backend (@deepseek-ai/dsh-terminal-bash), and the host sandbox/subprocess rows; the harness minimal preset is the reference for the surrounding composition.

Provenance

Derived from DeepSeek Harness (MIT): the persistent-bash core and the editor and shell tool plugins originate in the harness's packages/shell/tool-bash-persistent, packages/shell/tool-execute-bash, packages/fs/tool-str-replace-editor, and packages/guard/tool-finish. Behavior contracts are documented in the harness Agent Note 2026-08-20-minimal-mode-tool-set. The tool descriptions and schemas follow the reference CodeAct implementation exported in tools.json.