FOCAL for DeepSeek Harness

FOCAL is an experimental, privacy-first memory plugin for DeepSeek Harness. It filters an agent session into task-isolated memories and injects only the active task's bounded context into later model requests.

This is the DSH adaptation of FOCAL: Filtered On-device Continuous Activity Logging for Efficient Personal Desktop Summarization. The paper reproduction code remains in Haoran2099/focal.

Status

• Plugin version: v0.1.1
• DSH compatibility: 0.1.0-rc.6
• Verified against official commit 47f943859bef60e4160492346772ded9b24f765a
• Clean-install and Host-load tested with the official 0.1.0-rc.6 CLI
• Host plugin only; no Web UI extension yet

DeepSeek Harness is currently a developer preview and warns that compatibility- breaking changes will occur. This package pins the supported DSH interfaces intentionally.

Install

Install directly from the tagged GitHub source. The package is plain ESM and has no install-time build script.

dsh plugin --profile web add github:Haoran2099/focal-dsh#v0.1.1
dsh --profile web --dump-config
dsh --profile web

Use --profile headless instead to add FOCAL to one-shot CLI runs.

Remove it with:

dsh plugin --profile web remove focal-dsh

What it does

• Observes committed session/event records.
• Routes direct user messages into task-isolated memories using a small, deterministic similarity filter.
• Selectively records tool name, success/failure, and path-like arguments.
• Never records assistant token streams, raw tool arguments, or raw tool-result content.
• Redacts common credentials and email addresses; direct user text is captured by default and can be replaced with a generic marker through configuration.
• Stores one bounded JSON document per session under $DSH_HOME/focal-dsh/v1 (normally ~/.dsh/focal-dsh/v1).
• Contributes an active-task runtime-context snapshot and an anti-injection policy section.

Commands and tools

Human command: