DSH ExpMem

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Experience Memory for DeepSeek Harness.

DSH ExpMem is a community plugin, not an official DeepSeek project. It gives a DSH agent a file-backed Archive for distilled user habits, task experience, and reusable insights while reusing DSH's existing session history as Recall.

Architecture

flowchart LR
  Agent["DSH Agent"]
  Sources["Claude Code / Codex<br/>Markdown memory"]

  Agent -->|"expmem_search / write / forget"| Archive["ExpMem Archive<br/>JSON files"]
  Agent -->|"session_search / event_search"| Query["DSH Session Query<br/>SQLite FTS index"]
  Meter["DSH Token Meter"] -->|"70% pressure notice"| Agent
  Query --> Recall["DSH Recall<br/>session JSONL"]
  Sources -->|"dsh-expmem import"| Archive

  Archive --> Habits["Habits"]
  Archive --> Experience["Task experience"]
  Archive --> Insights["Insights"]

• Recall is verbatim prior-session history. DSH already stores it in JSONL and provides search through dsh-session-query.
• Archive is stable knowledge deliberately distilled by the agent. ExpMem stores one readable JSON file per record.
• Pressure promotion asks the current agent to preserve high-value experience before DSH compacts the context.
• ExpMem does not duplicate session events or modify the Agent Loop.

Install

dsh plugin --profile web add @creative-dswork/dsh-expmem

The bundle:

1. enables the existing DSH session-query SQLite backend on first search;
2. adds DSH's session_search, session_event_search, trace, and read tools;
3. adds expmem_search, expmem_write, and expmem_forget;
4. enables one ExpMem promotion notice per DSH compaction cycle.

Start DSH normally:

dsh web

Import Claude Code and Codex Memory

Preview and then import both agents' generated Markdown memories:

pnpm dlx @creative-dswork/dsh-expmem import all --dry-run
pnpm dlx @creative-dswork/dsh-expmem import all

The defaults are ~/.claude/projects/**/memory/*.md for Claude Code and $CODEX_HOME/memories/**/*.md (or ~/.codex/memories/**/*.md) for Codex. Override custom locations when needed:

pnpm dlx @creative-dswork/dsh-expmem import claude --claude-dir /path/to/memory
pnpm dlx @creative-dswork/dsh-expmem import codex --codex-dir /path/to/memories

Each source file becomes one experience record with its provider, absolute source path, and SHA-256 provenance. Repeating the command skips unchanged files and updates changed files in place. Source files are never modified or deleted. Use --workspace /path/to/project to attach an explicit project scope; the default Claude layout is mapped to its project when that mapping is unambiguous.

Storage

The default files are:

$DSH_HOME/
├── sessions/                         # DSH-owned Recall JSONL
└── expmem/
    ├── recall-index.sqlite           # derived DSH full-text index
    └── archive/
        ├── habit/<uuid>.json
        ├── experience/<uuid>.json
        └── insight/<uuid>.json

Archive records contain their category, title, content, tags, timestamps, optional source workspace/session, and import provenance. Writes use a temporary file plus atomic rename.

Tools

Tool	Purpose
session_search	Find relevant prior sessions in the current workspace.
session_event_search	Search events inside one prior session.
expmem_search	Search distilled experience across projects or one exact workspace.
expmem_write	Create a record or update an existing UUID.
expmem_forget	Delete one Archive record by category and UUID.

ExpMem instructs the agent to store only stable, verified knowledge and to avoid secrets, transient progress, raw logs, and unverified assumptions.

Pressure Promotion

Before each model step, ExpMem reuses DSH's token meter to measure the current context. At the default 70% threshold, it adds one synthetic user notice asking the agent to search existing ExpMem records and preserve at most three durable habits, experiences, or insights before continuing the original task.

The notice is stored in the DSH session log, so ExpMem emits it only once per successful compaction cycle. If DSH compacts before the notice can be delivered, ExpMem instead cites the compacted event range and asks the agent to recover the original messages from Recall. No background worker or separate LLM summarizer is involved.

Configuration

Override the expmem row in the profile's cordis.patch.yml:

- id: expmem
  config:
    rootDir: /absolute/path/to/expmem
    maxEntryChars: 20000
    maxPreviewChars: 1000
    maxSearchResults: 20
    promotionEnabled: true
    warningRatio: 0.7
    maxPromotionsPerCycle: 3
    recoveryAfterCompaction: true

rootDir must be absolute. Search is a case-insensitive literal AND over whitespace-separated terms. An empty query lists the newest records. Pressure promotion activates only when the active DSH composition provides both the token meter and model context-window metadata.

To change Recall indexing, override the bundle's existing row:

- id: session-query-sqlite
  config:
    path: /absolute/path/to/recall-index.sqlite
    openAt: first-search

Development

pnpm install
pnpm run check
pnpm run pack:dry-run

Install this checkout into a profile:

dsh plugin --profile web add .
dsh --profile web --dump-config

Current Scope

• Archive search is a transparent linear scan; add an index only after corpus size demonstrates the need.
• Promotion is cooperative: the current agent decides which records qualify and may decline to write any.
• No embeddings, background LLM summarizer, semantic deduplication model, or retention scheduler is included.
• Recall deletion and retention remain owned by DSH session persistence.

License

MIT