dsh-scope

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Context visibility for DeepSeek Harness (dsh) — a Codex-style /context lens for every session, plus a GitHub-style usage heatmap for your whole history.

Two UI contributions, one plugin:

1. Context Lens (session header) — live context-window occupancy with a segmented system / tools / messages composition bar, per-bucket session totals, and KV-cache hit rate. All data flows through the official token-meter session projections via useProjection — no RPC, no custom wire protocol.
2. Usage Heatmap (sidebar footer) — a GitHub-contribution-graph-style rolling 53-week token-usage grid. Click any day for the four token buckets, cache hit rate, session count, and per-model ranking. Fed by this plugin's own loopback-only aggregation endpoint.

Screenshots

Why

DeepSeek Harness treats wording and context as first-class engineering concerns, yet the stock Web UI shows no context occupancy and no usage history. dsh-scope fills both gaps the harness-native way: reading the projections the platform already computes, styling with the platform's design tokens (--dsw-alias-*), and mounting through the platform's slot registry — light/dark themes both correct with zero media queries.

Install

Requires dsh ≥ 0.1.0-rc.6 on your PATH.

dsh plugin --profile web add dsh-scope
dsh web                             # restart dsh to load the plugin

git clone https://github.com/helloxkk/dsh-scope.git
cd dsh-scope
npm install && npm run build
node scripts/install.mjs web        # or: node scripts/install.mjs <profile>
dsh web                             # restart dsh to load the plugin

The installer copies lib/, cordis.patch.yml, and package.json into the profile's node_modules and appends the bundle insert to the profile's cordis.patch.yml (idempotent — safe to re-run after every rebuild).

Uninstall

rm -rf ~/.dsh/profiles/web/node_modules/dsh-scope
# then remove the "# dsh-scope" block from ~/.dsh/profiles/web/cordis.patch.yml
rm -f ~/.dsh/storages/dsh-scope-cache.json   # optional: drop the fold cache

How it works

Client half (lib/client.js, loaded via the package's dsh.client declaration):

• conversation.session.header.actions (order 30, after the job list) renders the lens trigger: an occupancy ring with the live percentage. The popover reads three official projections — tokenUsage (four buckets accumulated over the whole durable log), contextPressure (input-side window pressure + the route's context window), and contextBreakdown (heuristic system/tools/message composition of the next request).
• sidebar.footer.action renders the heatmap trigger (label when the sidebar is wide, icon on the rail). The popover fetches GET /api/dsh-scope/days same-origin.

Host half (lib/index.js): one read-only, loopback-fenced endpoint (/api/dsh-scope/days). Aggregation is incremental: per-session fold state is cached in memory and persisted to ~/.dsh/storages/dsh-scope-cache.json; each request folds only events added since the last fold. Live sessions fold their in-memory tail; persisted sessions use the storage backend's opaque revision and readFrom(id, fromSeq), with contiguity checks and a full refold on log rewrites. Steady-state cost stays O(new events) no matter how large the logs grow.

Fold semantics mirror dsh-token-meter's tokenUsage projection: a usage sample rides an assistant/chunk (data.chunk.type === "usage") or assistant/message (data.usage); a repeated sample for the same (turn, step) replaces the earlier value instead of double counting, re-attributed to the later event's day and model. Model attribution follows assistant/message's data.message.source, falling back to the last request/header config.

Nothing is sent anywhere: the endpoint refuses non-loopback callers and non-GET methods before any work, and no provider credentials are read.

Development

npm run build                          # tsdown: host ESM + browser ModuleLoader bundle
node scripts/fixture-session.mjs       # optional: write a demo session log with usage events
node scripts/install.mjs web && dsh web

Compatibility

Built and verified against dsh 0.1.0-rc.6 (@deepseek-ai/dsh-base / dsh-web-app bundles). The harness is in developer preview and iterates quickly — expect compatibility-breaking changes.

License

MIT