dsh-session-bridge — 会话桥 (Session bridge)

A DSH plugin that lets the current agent drive other real DSH sessions directly from a prompt — create sessions, send messages to any session, wait for and read replies, resume offline sessions, and find sessions across workspaces. On top of that it can monitor and schedule a main task (watch its progress, nudge or correct its direction, and stop it), and archive sessions the same way the DSH sidebar's Archive action does.

中文文档见 README.zh.md.

What it does

• Create real DSH sessions. session_bridge_create makes a new main session (top-level UI session) in the current workspace, or in another workspace when you pass workspaceId / cwd. It can send one first prompt and optionally block until the first reply. Provider / model / reasoning effort are inherited from the calling session by default.
• Send messages to any session. session_bridge_send appends a turn (mode=queue) or injects steering into the running step (mode=steer), and can optionally wait for the next reply.
• Wait for a reply. session_bridge_wait blocks until a new text assistant reply appears after a given seq; with requireTurnEnd it also waits for the turn to settle. Timeout / abort return the partial result rather than throwing.
• Read any session. session_bridge_read folds a session's event log into readable rows — live or offline (from persistence) — with sinceSeq paging, role filtering, and a limit (default 20, max 100).
• Resume offline sessions. session_bridge_resume brings a persisted session back online (idempotent); it can also override provider / model.
• Find sessions. session_bridge_find matches by title, id, workspace, or directory across all workspaces, returning live/running state, title, and working directory. Bridge-registered titles act as aliases.
• Monitor and schedule a main task. session_bridge_status reads a session's real-time progress (running/idle, open turn, time since the last event for stall detection, pending work, latest reply). session_bridge_cancel stops a running session. session_bridge_monitor_start runs a background watchdog loop that polls the task, nudges it when it stalls, corrects it when it drifts, terminates it after it stays stuck, and wraps up when it finishes.
• Archive sessions. session_bridge_archive adds a session to the DSH workspace archive set (hidden from every grouping surface, history and workspace position preserved). session_bridge_archived lists the archive set, optionally resolving titles.

Monitoring worker

session_bridge_monitor_start installs a timer-driven loop. Every poll it observes → judges → schedules → logs the target session:

Observation	Action
A doneKeywords string appears in the reply and the session is idle	Wrap up and stop the watchdog (log DONE)
Idle with no pending work	Wrap up (settled) — no pointless nudging / cancelling
running and no event for more than stalledMs	Record a stall → steer a nudge (with useLlm, judge offtrack/stuck first)
Stall repeats ≥ maxStuckCycles	cancel the session
Making progress	Reset the stall counter (steady)

The watchdog only treats running sessions as stalled, so a finished or idle task is wrapped up rather than nudged forever. Logs go to ~/.dsh/super-injector/dsh-session-bridge-monitor.log (overridable).

Control it with session_bridge_monitor_start / _stop / _list.

Requirements

• Node.js ≥ 20
• pnpm
• DSH ≥ 0.1.0-rc.6

Build

# type-check + bundle the host build + pack a tgz (DSH_CHECKOUT points at the dsh source checkout)
bash scripts/build.sh && npm run build:client

# via the injector toolchain
dev_build_plugin dsh-session-bridge

Deploy

DSH web loads external plugins from the active profile. This package is a bundle: its package.json declares dsh.bundle.patch → cordis.patch.yml, whose insert row mounts the plugin. That declaration is what lets dsh plugin add install the package and activate it in one step.

Install from GitHub

npx -p @deepseek-ai/dsh dsh plugin --profile web add github:heartmove/dsh-session-bridge

dsh plugin forwards to pnpm inside ~/.dsh/profiles/web/, then reconciles the bundle into the profile's dsh.profile.bundles layer list. A git install fetches sources, so pnpm runs the package's prepare script (tsdown) to build lib/ from src/ after checkout.

pnpm ≥ 10 refuses to run a git dependency's prepare script until it is allowlisted, so the first add fails with an "Ignored build scripts" hint. Copy the exact package key pnpm printed into the profile's pnpm-workspace.yaml (~/.dsh/profiles/web/pnpm-workspace.yaml):

allowBuilds:
  dsh-session-bridge: true

then re-run the add. That allowance means "run this package's code on my machine at install time" — only allow packages whose source you trust, and pin a commit (github:heartmove/dsh-session-bridge#<sha>) so a later push cannot silently change what runs.

Restart dsh web, then hard-refresh the page (Ctrl/Cmd+Shift+R).

Install from a local checkout

From the directory that contains this checkout:

npx -p @deepseek-ai/dsh dsh plugin --profile web add ./dsh-session-bridge

pnpm links the checkout and dsh activates the bundle the same way.

Manual link

To manage the profile by hand, link the package and list it as a bundle in ~/.dsh/profiles/web/package.json (the bundle's own cordis.patch.yml supplies the loader row, so no insert entry is needed):

{
  "dependencies": {
    "dsh-session-bridge": "link:D:\\path\\to\\dsh-session-bridge"
  },
  "dsh": {
    "profile": {
      "bundles": ["@deepseek-ai/dsh-base", "@deepseek-ai/dsh-web-app", "dsh-session-bridge"]
    }
  }
}

(On POSIX systems use link:/path/to/dsh-session-bridge.) Then run pnpm install in the profile directory and restart dsh web.

Inject directly (dev)

For fast iteration while developing the plugin, you can also load it directly through the injector toolchain (no bundle entry required):

dev_inject_plugin D:\code\dsh-session-bridge

Remove it with dev_uninject_plugin dsh-session-bridge (clears the injector registration and junction; not re-assembled on restart).

Usage

Tool	What it does
session_bridge_create	Create a main session (current or another workspace via workspaceId / cwd); optional first prompt + waitForReply.
session_bridge_send	Send a message (mode=queue/steer); optional wait-for-reply.
session_bridge_wait	Wait for a new text assistant reply after sinceSeq; optional requireTurnEnd.
session_bridge_read	Read messages — live or offline; sinceSeq paging, role filter, limit.
session_bridge_resume	Bring a persisted session back online (idempotent).
session_bridge_find	Find sessions by title / id / workspace / directory across workspaces.
session_bridge_status	Read a session's live progress (running, open turn, stall detection, pending work, latest reply).
session_bridge_cancel	Stop a running session (abort active turn; clear queued/steering work unless keepInbox).
session_bridge_monitor_start	Start a background watchdog on a main session (poll, nudge, correct, cancel, wrap up).
session_bridge_monitor_stop	Stop a watchdog (keep the session itself running).
session_bridge_monitor_list	List active watchdogs and their state.
session_bridge_archive	Archive a session (hidden from groupings; history and position preserved).
session_bridge_archived	List the archive set, optionally resolving titles.

All tools return lossless JSON; wait-style tools never throw on timeout — they return a timedOut / aborted flag.

Project layout

src/
  index.ts    host plugin entry (registers the tools; mounts the monitor)
  core.ts     shared host logic (create/send/wait/read/find, status snapshot, archive attach)
  tools.ts    tool registrations (bridge + status/cancel + monitor + archive)
  monitor.ts  the background watchdog loop (statusSnapshot + rules + optional LLM judge)
  registry.ts bridge-side title/workspace registry (~/.dsh/session-bridge-registry.json)
scripts/
  build.sh    type-check + link types against the DSH checkout

License

MIT