dsh-local-long-horizon

Host-owned long-horizon task status for local coding agents in the DeepSeek Harness web UI.

Soft “keep a STATUS.md” conventions drift: agents invent sections, forget to update, or burn tokens re-reading files after compaction. This plugin turns that into a structured vault the Host owns, with validated agent tools, a tiny inject file for resume, a one-way STATUS.md projection, and a Long horizon rightbar + composer dock chip for the human.

Related plugins (same dual-face dsh.bundle shape for the web rightbar / dock):

This package: dsh-local-long-horizon.

Verified against DeepSeek Harness 0.1.7-rc.2 (dsh web).

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Requirements

• DeepSeek Harness web profile (dsh web).
• Node.js ≥ 20 to build.
• A project AGENTS.md is strongly recommended. DeepSeek Harness injects it into agent instructions; this plugin hooks that seam so the agent keeps reading the live inject file (snippet below).

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Screenshots

Light theme, matching the DSH default.

If images fail to load, the ASCII mock below still conveys the layout.

What you see

Long horizon                    ● Active          [ Turn off ]
  M4 · agent loop · main · 20s ago
  Ship hello CLI + long-horizon dogfood
  /home/you/dev/my-project

┌─ Now ─────────────────────────────────────────┐
│  In flight: wire pane smoke: Next / Done …    │
│  Next 3                                       │
│    1. wire pane smoke: Next / Done …          │
│    2. capture dock chip with rightbar closed  │
│    3. write README install + AGENTS snippet   │
├─ Done (recent) ───────────────────────────────┤
│  ✓ verify node hello.js · verify: … · 3h ago  │
│  ✓ write hello.js · verify: … · 4h ago        │
└───────────────────────────────────────────────┘

• ON / OFF per project — when OFF, mutating tools refuse; the inject file freezes to a one-line DISABLED notice; status_get still works.
• Next hard-capped at 3 — fourth item is rejected with a clear validation error.
• In flight is one slice — set with status_set_inflight; clear with status_clear_inflight (empty summary is refused).
• Done records prefer verify — missing verify warns in v0 (not a hard reject).
• Sync hints (pane only, not the dock chip) — stale board, git branch change, or different chat than the last writer.
• Dock chip — short live label under the composer when the rightbar is closed (Horizon · …, Horizon · blocked, …). Click to reopen the pane.

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How resume works

DeepSeek Harness already discovers project-root AGENTS.md (and related baselines) and injects them into the agent’s instructions. This plugin does not replace that seam — it hooks into it.

  DSH injects AGENTS.md  ──►  agent instructions every turn
         │
         │  (your AGENTS.md says: read the inject file / use status_* tools)
         ▼
  Agent tools ──► Host TaskStatus service ──► JSON vault (~/.dsh/storages/…)
                         │
                         ├──► <cwd>/STATUS.md                 (human + git)
                         └──► <cwd>/.dsh/task-status-inject.md   (≤ ~50 tokens)

1. Vault is source of truth — markdown is generated; tools never “only edit STATUS.md.”
2. On every successful mutation the Host rewrites the inject file and STATUS.md.
3. Recommended: keep a short root AGENTS.md so the harness keeps pushing the contract into context. That file should tell the agent to treat .dsh/task-status-inject.md as binding current state (and to update via status_* tools). The mutable bytes stay in the tiny inject file — not in a giant static prompt — while AGENTS.md is the stable “glue” DSH already knows how to inject.

When you turn Long horizon ON (status_init, pane “Start tracking”, or re-enable), the Host auto-ensures that glue: creates a minimal root AGENTS.md if missing, or appends the ## Long horizon section if the file exists without it. It never overwrites a richer human AGENTS.md — hand-tune project-specific rules freely; only the missing section is added.

Without that section, the vault and tools still work, but a fresh agent is more likely to ignore the inject file and fall back to chat memory or read-loops.

Recommended AGENTS.md snippet

## Long horizon
Before coding, read `.dsh/task-status-inject.md` if present — it is binding
current task state (DeepSeek Harness injects this AGENTS.md; the inject file is
the live board).
Use status_* tools to update Next (≤3), in-flight, done (with verify), and blocked.
Do not invent a parallel STATUS novel; the vault owns truth and STATUS.md is generated.

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Install

From npm (recommended)

dsh plugin --profile web add dsh-local-long-horizon
# restart dsh web (or rely on live patch reload), then hard-refresh the browser

From GitHub

dsh plugin --profile web add github:janpauldahlke/dsh-local-long-horizon

From a git checkout (developers)

git clone https://github.com/janpauldahlke/dsh-local-long-horizon.git
cd dsh-local-long-horizon
npm install && npm run build
dsh plugin --profile web add "$(pwd)"

Restart (or boot) dsh web so the host + client faces load:

env -u DSH_WEB_URL -u DSH_SHELL -u DSH_SESSION_ID dsh web --no-open

Uninstall:

dsh plugin --profile web remove dsh-local-long-horizon
# restart the web instance that had the plugin

No harness file: dependencies — the host registers tools on the live ctx.tools service provided by dsh.

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Agent tools

Default cwd comes from the agent session workspace; pass cwd to override.

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Surfaces

The pane auto-follows the chat’s workspace folder. Use Track folder only to override; Use chat workspace resets.

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Architecture

Dual-face package (same bar as gpu-monitor / slot-health):

• Host (lib/index.js, ESM) — vault service, agent tools, HTTP route.
• Client (lib/client.js, CJS ModuleLoader factory) — rightbar pane + dock chip; polls the Host JSON route.
• Glue — cordis.patch.yml + dsh.bundle / dsh.client in package.json.

Presentation is inline styles only (sibling chrome: currentColor, rounded cards, muted mono ages).

dsh-local-long-horizon/
├── package.json
├── build.mjs
├── cordis.patch.yml
├── media/                 # README screenshots
├── src/host/              # vault, tools, route, inject, STATUS.md
├── src/client/            # pane + dock chip
├── src/shared/            # shared types
└── lib/                   # built artifacts (required at runtime)

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Develop / test

npm test          # build + node suite (schema, vault, tools — no GPU)

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Limitations

• Last-writer-wins — no distributed lock across sessions.
• Next ≤ 3 is intentional; keep overnight plans rotating, not novel-length.
• Chats without a workspace cwd need a folder open (or a pasted absolute path).
• Out of tree only — no DeepSeek Harness core patches.
• STATUS.md overwrite is one-way: treat hand-edits as disposable.

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Contributing

See CONTRIBUTING.md for setup, layout, and PR expectations.

License

MIT — see LICENSE.