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🧭 dsh-retrace

Recall · Edit-and-resend · Regenerate, plus write-safe in-conversation versioning — the Agent business layer (production-grade guarantees) for DeepSeek Harness.

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Recall / edit-and-resend / regenerate — the three moves every conversation deserves. But rewinding is not just "delete a message": DeepSeek Harness stores conversations in an append-only event log, so a recall only rewinds the context while changed artifact files stay changed. dsh-retrace versions the conversation and its artifacts together, and guarantees every rewind is legal — never dirtying the log, never breaking /compact.

🛡️ Write safety · 🔍 Deep offline checks · 🔄 Detect → repair → guard — see below.

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⚡ One-minute install

Requires DeepSeek Harness with the dsh CLI. Restart DSH after install (a running app does not hot-reload).

dsh plugin --profile desktop add dsh-retrace    # DSH Desktop
# or Web: dsh plugin --profile web add dsh-retrace
# or GitHub: dsh plugin --profile desktop add github:yamingmou/dsh-retrace
# or ZIP: dsh plugin --profile desktop add ~/plugins/dsh-retrace

No command line? Install the community plugin market once, then find dsh-retrace in Settings → Plugin Market and install it with one click:

dsh plugin --profile desktop add dshmarket    # one time

After the restart, hover any assistant reply → ↩ / ↻; any user message → ✎. Full steps in 📦 Installation.

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🛡️ Production-grade guarantees (all live in 0.4.x)

	Capability	What it means
🛡️	Write safety	Every rewind passes a three-layer pre-write contract guard; running agents are auto-stopped (official cancel/whenIdle); turn-interval markers are wrapped in a temporary step — rewinds never dirty the log, /compact never breaks
🔍	Deep offline checks	Companion dsh-log-contract ships 30+ contract rules (token-meter pairing / cross-step references / physical order / inbox replay), validated against real corrupted-session fixtures — it finds the class of problem that makes /compact permanently fail
🔄	Detect → repair → guard	A watchdog snapshots the log at the first sign of concurrent writes; offline fix neutralizes problem markers and clips cross-step references in place; pre-write validation stops bad events before they land

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✨ Features

Action	Where	What happens
↩ Recall	hover any assistant reply, or the row under any user message	Removes the whole exchange round (the input and the agent's output, tool rows included) from both the model context and the conversation view; the input text is echoed into the composer so you can re-ask or re-edit immediately. A small transient notice marks the rewind and disappears once you keep typing.
✎ Edit & re-send	row under any user message	The edited round is rewound and the new text is re-sent. By default only the edited round is replaced — earlier history stays visible; the optional "fresh conversation" setting rewinds the whole surface (earlier messages then leave the model context, and stay visible in the view as a marker notice by default). A collapsed "original input" reference sits right under the new message — click to expand, configurable off.
↻ Regenerate	hover any assistant reply	The reply (and everything after it) is rewound and hidden, then the original prompt is re-sent so the agent answers again.

Versioning & rollback (live in 0.4.x) — every rewind is also recorded as a version:

	What
🕘	Timeline	a Versions tab in the conversation view: every version (type, time, message count, file-change badges), pushed live via session/projection (no polling), windowed for long histories
↩️	Artifact rollback	context-only / artifacts-only / both with dry-run preview; git-first + content-addressed snapshot fallback; the rollback is itself a new version (restore)
🧭	Jump-to-conversation	one click from a version to that point in the conversation (auto-loads history, anchor highlight)
🧹	Bounded storage	snapshots keep the most recent N versions (default 50); throttled background sweep prunes truncated ones

Why it's different (the interaction layer — the guarantees above are the storage layer):

• 🎯 Whole-round recall — removes the input and its output (tool rows included), not just a single bubble.
• 🖥️ Web + Desktop — one plugin, both DeepSeek Harness surfaces.
• 🧠 View ⇄ context in sync — the conversation view always reflects exactly what the agent sees.
• ⚡ Try in 30 seconds — the dynamic form installs in your current session with no rebuild.

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📦 Installation

1. Profile bundle (recommended)

The package declares a dsh.bundle manifest, so it installs through the official plugin path into any profile:

dsh plugin --profile <name> add dsh-retrace

⚠️ Restart required. The install writes the new files and re-renders the profile composition, but a running app does not hot-reload bundles — quit and reopen DSH Desktop (or restart the dsh process for a standalone Web deployment) to load the plugin. To uninstall: dsh plugin --profile <name> remove dsh-retrace (then restart again).

2. Manual install (no dsh CLI)

The same result with plain file edits and pnpm — exactly the steps dsh plugin add performs for you:

Downloaded this repo as a ZIP? Unpack it somewhere stable (e.g. ~/plugins/dsh-retrace), then either dsh plugin --profile desktop add ~/plugins/dsh-retrace, or follow the steps below with the dependency line pointing at the folder: "dsh-retrace": "file:~/plugins/dsh-retrace".

1. Open the profile manifest (defaults: ~/.dsh/profiles/desktop on DSH Desktop, ~/.dsh/profiles/web for standalone Web) and add both the dependency and the bundle-layer entry:

   {
     "dependencies": {
       "dsh-retrace": "^0.4.0"
     },
     "dsh": {
       "profile": {
         "bundles": [
           "@deepseek-ai/dsh-base",
           "@deepseek-ai/dsh-web-app",
           "dsh-retrace"
         ]
       }
     }
   }
   

   (Keep whatever entries your profile already has; only add the two dsh-retrace lines.)

2. Install inside the profile directory:

   cd ~/.dsh/profiles/<name> && pnpm install
   

3. Restart DSH Desktop / the dsh process (see above).

For local development, point the dependency at a checkout instead of the registry: "dsh-retrace": "file:/path/to/dsh-retrace" — or let dsh do it: dsh plugin --profile <name> add /path/to/dsh-retrace. For the latest GitHub commit without a release: use "dsh-retrace": "github:yamingmou/dsh-retrace" (standard pnpm git dependency syntax) in the same dependencies block, then pnpm install.

3. npm package + composition (classic)

npm i dsh-retrace

Add the package to the harness composition (cordis.yml of the app/deployment you use):

- name: 'dsh-retrace'

The client half is picked up automatically from the package's dsh.client metadata and bundled into the Web client (a client-module rebuild happens automatically when the composition changes). The Host half registers the same-origin HTTP route /api/plugins/retrace/* for the browser UI.

4. Dynamic plugin (current session — no install, no rebuild)

Use the dynamic entries shipped in the package. In the session where you want the feature:

1. Open the plugin editor and define a new plugin from lib/dynamic-host.js (Host half) and lib/dynamic-client.js (Client half).
2. Approve and run the Client half.
3. Done — hover any assistant reply, or any user message, and use ↩ / ✎ / ↻.

The dynamic host registers the same operations behind the package-private harness.handle RPC (retrace.recall / retrace.editAndResend / retrace.regenerate).

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⚙️ Settings → General

Setting	Default	Description
Show the original input after editing	on	A collapsed "original input" reference under the re-sent message showing the most recent replaced text (reference only — never sent to the model).
Start a fresh conversation after editing	off	Hide earlier messages too, so the conversation looks like a fresh start (the whole surface is rewound before re-sending). Default off: only the edited round's context is replaced.
Hide shadowed messages per marker	on	On (default): recall/edit/regenerate hide the replaced round per their markers. Off: every message stays visible; markers only show the notice and reference (review the full history). A single marker that would hide more than 40% of the conversation degrades to notice-only (history never silently vanishes).
Version & artifact snapshots	on	On: every recall/edit records a version (messages and touched files) powering the timeline and artifact rollback. Off: only rewinds context — no version records, no artifact tracking (lightest).
Git integration	on	On: use git to record and roll back when the workspace is a repository (never auto-commits, never touches your branches); non-repo workspaces can enable git from the timeline. Off: built-in snapshots under ~/.dsh only — the plugin never touches the workspace git state; features are equivalent.
Version retention limit	50	File snapshots are kept for the most recent N versions; older ones are pruned automatically (timeline records and the audit trail are always kept).

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🧠 How it works

 durable transcript (append-only)          model context & view
 ┌─────────────────────────────────┐    ┌────────────────────┐
 │  … target message               │    │  … target message  │
 │      ↓ shadow span              │    │       ↓ rewind     │
 │  [target … last surface node]   │ ──▶│  (empty replace    │
 │      ↳ one replacement          │    │   = context cut)   │
 │        assistant/message (empty)│    └────────────────────┘
 │      ↳ optional original-input  │    agent.followup(new prompt)
 └─────────────────────────────────┘    → next turn rebuilds request

1. Host core (lib/host-core.js, zero runtime imports) locates the target message in the session's live surface, computes the shadow span [message … last surface node], and appends one replacement assistant/message with an empty body — a valid surface node that derives to no model message, so the LLM context simply rewinds.
2. Edit / regenerate additionally call agent.followup(...) with the (new) prompt text; the agent's next turn builds its request from the rewound session.deriveMessages().
3. Client (lib/client.js) registers:
   • a user-actions conversation node under every user message (an edit/recall row with an inline editor); recall echoes the text into the composer,
   • the recall-marker node renderer: a notice row that injects CSS hiding every shadowed message row from the flow (view and model context stay in sync), plus the optional original-input comparison block,
   • the retrace entry in the conversation.chat.assistant-actions strip (recall / regenerate),
   • preference toggles and the retention limit under Settings → General.

Two different layers are at play: the durable transcript (append-only; old events are never rewritten or deleted) and the model-visible surface (rewound by an appended replacement event). So the old events stay in the log as an audit trail — but they are synchronized out of both the model context and the visible conversation, and the view always reflects what the agent actually sees. Persistence, projections and the transcript remain consistent because the plugin only appends valid, typed session events.

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⚠️ Requirements & limitations

• Only user messages can be edited; recall works on user and assistant messages. Tool results are shadowed along with the recalled range but are not themselves recall targets.
• The agent must be idle: while a reply is streaming you must stop it (⏹) before recalling or editing. The Host rejects with agent-busy otherwise.
• Recall/edit operate on the active model surface: a message that was already compacted away or previously recalled is rejected (target-shadowed).
• Regenerate re-sends only the text of the original prompt; prompts that carried images fall back to the text-only content.

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🗺️ Roadmap

What's in today (0.4.x):

• Recall / edit-and-resend / regenerate, each written through a three-layer pre-write contract guard and a safe-edit path (auto-stop the agent, temp-step markers) — rewinds never corrupt the log or break /compact.
• In-session version timeline + artifact rollback (git-first, snapshot fallback, dry-run preview, jump-to-conversation).
• Fork map + session lineage in the conversation view.
• Real-time watchdog — snapshots the log at the first sign of concurrent writes.
• Companion dsh-log-contract: 30+ offline contract rules + in-place repair (fix --neutralize / --clip-crossstep) for sessions that would fail /compact.

What's next — see the public roadmap for the agent business-layer plan (runtime guard, interruption governance, ecosystem-facing interfaces). This README only describes what is already shipped.

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🛠️ Development

# structure
lib/host-core.js       # transport-neutral host logic (no imports)
lib/index.js           # published Host: harness RPC + HTTP route
lib/client.js          # client SOURCE (React via import; pluggable transport)
lib/client.bundle.js   # BUILT client bundle — the self-registering loader entry
                       # (`window.__ModuleLoader__.load`) served by client-modules
lib/dynamic-host.js    # GENERATED dynamic Host half (from lib/host-core.js)
lib/dynamic-client.js  # GENERATED dynamic Client half (from lib/client.js)
scripts/build-client.mjs      # bundle lib/client.js → lib/client.bundle.js
scripts/generate-dynamic.mjs  # generate both dynamic entries from the canonical sources
scripts/check-dynamic.mjs     # syntax-check the dynamic entries (function bodies)
test/                 # vitest suite: host-core ops + generated-entry smoke tests
.github/workflows/    # CI (syntax + build-sync + tests) and npm publish (v* tags)
cordis.patch.yml      # dsh.bundle profile patch layer

pnpm install          # install dev dependencies (vitest, esbuild)
pnpm check            # syntax-check sources AND the generated dynamic entries
pnpm build            # regenerate lib/dynamic-*.js + lib/client.bundle.js
pnpm test             # run the host-core unit tests
npm pack --dry-run    # verify the published file list

⚠️ Generated files. lib/dynamic-host.js, lib/dynamic-client.js and lib/client.bundle.js are built artifacts generated from lib/host-core.js and lib/client.js — never edit them by hand. CI fails when a committed artifact is stale (git diff --exit-code), so run pnpm build before committing. The dynamic client reuses the same client source as the published one and only swaps the transport (host.call vs the HTTP route) via __setMessageEditorWire.

PRs and issues are welcome — see CONTRIBUTING (coming soon) and the issue tracker.

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📚 Ecosystem

Listed on the dsh-plugin topic.

Part of the Agent business layer (production-grade guarantees) — see the public roadmap for the framework-agnostic layer and how dsh-retrace is its DeepSeek Harness implementation. Companion components:

• dsh-log-contract — the business layer's "doctor": 30+ offline contract rules + in-place repair (fix --neutralize / --clip-crossstep). Installed automatically as a dependency; also published standalone for direct use.

Install straight from GitHub (no npm registry needed — handy when you hand this repo's link to an AI or want the latest commit):

dsh plugin --profile desktop add github:yamingmou/dsh-retrace
# or with pnpm directly into a profile:
cd ~/.dsh/profiles/desktop && pnpm add github:yamingmou/dsh-retrace

Then restart DSH Desktop as usual. The dsh-log-contract dependency is pulled in automatically.

A curated overview of the DeepSeek Harness plugin ecosystem lives at awesome-dsh-plugin (third-party listing — verify availability before relying on it).

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👥 Team

Built by the OfferKuai team — an AI job application assistant on a mission that "users need results, not repeated conversations". Founder: Zhaofeng (Yaming). This plugin is released as open source for the DeepSeek Harness community.

📄 License

MIT

🧭 Session archaeology (retrace CLI)

Every tool call's full input/output is persisted in the session log — a data and audit asset. The retrace CLI provides read-only archaeology (reusing dsh-log-contract's contracts and extraction):

retrace index <session>                        # tool-call index (A1)
retrace query <session> --cmd "seed-scale"     # search outputs by command regex (A1)
retrace extract <session> --pattern "seed-scale" --out ./found   # export outputs (A2)
retrace file-history <session> <path>          # write/edit history of a file (A3)
retrace file-diff <session> <path> 0 5         # line diff between two versions (A3)
retrace lineage <session>                      # parent-chain lineage (A4)

<session> is a full log path or a sessionId (auto-looked-up under ~/.dsh/sessions). All read-only.

Session lineage in the fork map (A4, UI): the Fork map view header shows the current session's parentSession chain (session → parent → root, ← direction). Data comes from GET /api/plugins/retrace/lineage?sessionId= (read-only header walk with cycle protection), the same semantics as the CLI retrace lineage — so "which session did this one continue/fork from" is visible at a glance, and serves as the fork-topology metadata source.