dsh-bash-rtk

Route eligible shell commands through rtk (Rust Token Killer) inside the DeepSeek Harness (dsh) bash executor — compress tool output, save tokens, change nothing else.

中文版

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Table of Contents

• Quick Example
• Requirements
• Why
• How it works
• Install & enable
• API / Configuration
• Which commands are routed
• Development
• License

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Quick Example

The plugin rewrites commands at the resolve() boundary — before anything runs:

Input (command)	Resolved output	Reason
git status	rtk git status	Simple + whitelisted
cargo build --release	rtk cargo build --release	Simple + whitelisted
git status | grep x	git status | grep x	Complex shell — passthrough
ls -la	ls -la	Not whitelisted — passthrough
git status (rtk absent)	git status	Binary missing — identity fallback

Everything else — workdir, timeout, env, exit code, sandbox confinement — is inherited unchanged.

Requirements

• Node.js: >= 20.0.0
• rtk: rtk --version must exit 0 on PATH (install separately, e.g. cargo install rtk)

Why

LLM agents burn tokens on verbose tool output (git log, cargo build, pytest trails…). rtk already knows how to shrink those for 30–90%. This plugin bolts that filtering onto dsh's bash executor so every eligible command is auto-routed through rtk — with zero semantic change to what actually runs.

How it works

model → dsh bash tool → RtkBashExecutor.resolve()
                              │
              ┌───────────────┴────────────────┐
         eligible?                         not eligible
     (simple + whitelisted)           (complex / unknown)
              │                                │
      rtk <subcommand> …              command runs unchanged
   (rtk compresses output)            (byte-for-byte passthrough)

Three independent guards decide (see src/wrap.ts):

1. Complexity — any shell metacharacter (| & ; < > \ $`) disqualifies the command. Wrapping those would silently alter what runs, so they pass through untouched.
2. Whitelist — only known dev tools that rtk actually implements are eligible (map in wrap.ts).
3. Availability — if the rtk binary is absent on PATH, the transform is the identity: the deployment behaves exactly like the stock local executor.

Versioning note

The plugin does not bundle or pin rtk. At dsh startup it probes rtk --version on PATH (see resolveRtk() in src/index.ts). Therefore:

• When rtk ships a new release, any user who upgrades rtk on their machine automatically gets the new behavior — no plugin update required.
• The plugin version (this repo) and the rtk version are independent; keep them separate. This README states the minimum rtk version tested against, not a lockstep number.

Requires: rtk on PATH (rtk --version exits 0). The plugin does not install or manage rtk — you must install and update rtk yourself (e.g. cargo install rtk or download a release binary). When rtk is absent the plugin is a silent no-op passthrough.

Compatibility & version alignment

The plugin is verified against dsh 0.2.1-alpha.1 and keeps the 0.1.x line working.

dsh gates the installation of every plugin: @deepseek-ai/dsh-app-boot reads the plugin's peerDependencies and checks each @deepseek-ai/dsh / @deepseek-ai/dsh-* entry against the running dsh version with semver.satisfies(runtime, range, { includePrerelease: true }). A range whose branches cannot admit 0.2.1-alpha.1 — e.g. the 0.1.1 release's … || >=0.1.1-rc.1 <0.2.0-0 — fails that check, and the plugin manager refuses the install with is incompatible with dsh 0.2.1-alpha.1 (unless a manual dsh plugin allow-version exact-version exemption is granted). The marketplace applies the same prerelease-aware reading of engines.dsh and the host peers.

The ranges shipped now (see peerDependencies in package.json) add an explicit 0.2.x branch:

"@deepseek-ai/dsh-bash-local":   ">=0.0.1-rc.1 <0.1.0 || >=0.1.0-rc.1 <0.1.1 || >=0.1.1-rc.1 <0.2.0-0 || >=0.2.0-0 <0.3.0-0"
"@deepseek-ai/dsh-bash-sandbox": ">=0.0.1-rc.1 <0.1.0 || >=0.1.0-rc.1 <0.1.1 || >=0.1.1-rc.1 <0.2.0-0 || >=0.2.0-0 <0.3.0-0"
"@deepseek-ai/dsh-shell":        ">=0.0.1-rc.1 <0.1.0 || >=0.1.0-rc.1 <0.1.1 || >=0.1.1-rc.1 <0.2.0-0 || >=0.2.0-0 <0.3.0-0"

The prerelease-branch rule still applies: a broad >=0.0.1-rc.1 <0.3.0 would silently exclude every 0.1.0-* / 0.1.1-* / 0.2.0-* prerelease under node-semver's default rules (a prerelease only satisfies a range when some comparator shares its exact major.minor.patch tuple and also carries a prerelease tag). Because dsh's gate — and the marketplace — evaluate ranges with includePrerelease: true, those explicit <0.x.0-0 upper bounds are exactly what admit a running prerelease such as 0.2.1-alpha.1.

package.json also declares the host requirement where discovery tools read it:

"engines": { "node": ">=20.0.0", "dsh": ">=0.1.0-rc.6 <0.2.0 || >=0.2.0-0 <0.3.0-0" }

(dsh.plugin.json mirrors the same range for older readers; dsh itself reads package.json.)

All three @deepseek-ai/dsh-* peers stay optional in peerDependenciesMeta, so the plugin still installs where they are absent (it then behaves as a passthrough). @deepseek-ai/cordis is not a peer dependency — dsh injects it at runtime; it is only a dev dependency for typechecking.

What the 0.2 port changed. The execution seam is unchanged — the plugin still only overrides resolve(), and the 0.2 ShellExecSpec merely gains a sandboxPolicy field that is spread through untouched. The compile-time fixes are the module specifier (cordis → @deepseek-ai/cordis; the unscoped alias no longer exists) and the executor surface the tests use (run()/start() were replaced by execute() plus result(); SandboxProvider.confine() is now async and returns Promise<ConfinedArgv>; SandboxPolicyService now requires ctx.sessionProjections).

Known version skew: dsh (the aggregate, what npx @deepseek-ai/dsh installs) and its @deepseek-ai/dsh-* sub-packages are on separate semver tracks — the aggregate can be 0.1.1-rc.2 while the published sub-packages are still 0.0.1-rc.1. The ranges above pin to the published sub-package versions but are checked by dsh against its own version, so every supported release line needs its own explicit branch. Watch the releases for a matching update.

Install & enable

The plugin is disabled by default — installing it does nothing until you opt in.

# 1) from a local checkout
dsh plugin --profile web add "<path-to-this-dir>"

# 2) or directly from the latest GitHub release tarball (no local clone needed)
dsh plugin --profile web add \
  "https://github.com/DeepTrial/dsh-bash-rtk/releases/latest/download/dsh-bash-rtk-latest.tgz"

# enable it via an optional overlay — add to your profile's cordis.patch.yml:
#   - id: bash-sandbox
#     disabled: true
#   - id: bash-rtk
#     disabled: false

dsh web   # restart to apply

The bundled overlay snippet lives in cordis.patch.yml. It swaps the stock sandbox executor for RtkSandboxBashExecutor (file confinement preserved) and leaves the unconfined RtkBashExecutor available for danger-full-access setups.

API / Configuration

Both executors accept the same base config as their stock counterparts (LocalBashExecutor / SandboxBashExecutor) plus one optional field:

Option	Type	Default	Description
rtkAvailable	boolean	resolveRtk() result	Force-enable or force-disable rtk wrapping. Useful for tests or deployments where the binary path is non-standard.

All other options — cwd, timeoutMs, graceMs, etc. — are inherited unchanged from the upstream executors.

Which commands are routed

The set of commands eligible for rtk-wrapping is defined by rtk itself — see the rtk command reference / README.md for the authoritative, maintained list. This plugin mirrors that list; when rtk adds a new subcommand, upgrade rtk (not this plugin) to pick it up.

Complex commands — pipelines, &&/;, redirects, $( ), env assignments — always run natively regardless of the whitelist.

Development

# 1. clone the plugin
git clone https://github.com/DeepTrial/dsh-bash-rtk.git

# 2. install the released harness packages the plugin builds against
cd dsh-bash-rtk && pnpm install --ignore-scripts

# 3. run checks
pnpm run check        # typecheck + test + build
pnpm run test         # tests only
pnpm run typecheck    # tsc only

devDependencies pin the published @deepseek-ai/dsh-* / @deepseek-ai/cordis releases the plugin builds and tests against (currently the 0.2.1-alpha.1 line); no sibling deepseek-harness checkout is required.

License

MIT