dsh-gitmemo

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Git-backed long-term memory for DeepSeek Harness (dsh) — a Cordis plugin mirroring
GitMemo. The root agent stores completed task outcomes as
immutable markdown entries in a local .mem Git repository (a single main branch with
structured commit messages) and searches them before starting new work. Git is the only
dependency, and no manual memory commands are ever needed.

Key Characteristics

• Extremely simple — once installed, no manual memory commands in day-to-day tasks
• Fully automated — the root agent runs search, read, write, delete, replace as part of its normal task flow
• Local-only & offline — memory lives in a local .mem Git repository; no cloud dependency
• Git-only — no runtime dependency beyond the git CLI
• Token-efficient — reuses prior conclusions via mem_search; subagents carry neither the workflow rules nor the tool schemas
• Immutable entries — every write creates a new file; corrections use mem_replace (one commit deletes the old file and adds the new one), withdrawal uses mem_delete
• Structured search — commit messages carry GitMemo-* trailers (keywords, digest, search-text projections); search is git log --grep --fixed-strings over commit messages only — entry bodies are never scanned
• Auditable — every memory action is a commit in .mem's Git history; replaced/deleted entries stay readable by hash
• Crash-safe — write/delete/replace run under a cross-process lock with a journal written before entry mutation; migration uses a sibling swap journal so an interrupted directory exchange is recovered before automatic initialization
• Single-branch — .mem permanently stays on main; the code branch/SHA is recorded as entry metadata only

What the Plugin Provides

Installation

Requires dsh ≥ 0.1.0-rc.6 and the git CLI.

From the npm registry (once published):

dsh plugin --profile web add @fonlan/dsh-gitmemo

From a local checkout (development / unpublished):

dsh plugin --profile web add /path/to/dsh-gitmemo

Then restart the dsh profile (e.g. restart the dsh web process). The plugin registers on the
host plane, so every new root agent session in that profile sees the tools and the rules.

Configuration

The bundle patch ships with sensible defaults; override them in the profile's
cordis.patch.yml:

- id: dsh-gitmemo
  config:
    searchLimit: 20        # max hits per mem_search call (page size)
    lockTimeoutMs: 30000   # cross-process lock wait timeout
    projectRoot: null      # optional explicit project root (defaults to the session cwd)

Memory Location & Format

The .mem repository lives at the project root of the calling session's workspace
(git rev-parse --show-toplevel, falling back to the working directory; an explicit
projectRoot config wins). The repo layout:

.mem/
├── .git/
├── .gitmemo-format        # schema version marker, e.g. "2"
└── entries/               # one immutable file per active memory
    └── <utc-ms>-<digest-prefix>-<slug>.md

• .mem is initialized on its own main branch; initialization writes .mem/ and the lock
  file path into the parent repo's .git/info/exclude (never into a version-controlled
  .gitignore), and refuses to run when the parent repo already tracks .mem content.
• Every write creates a brand-new file with an exclusive create (never overwrites), commits
  one ADD commit with structured trailers, and records the code branch/SHA/related paths in
  the entry front matter.

The whole memory stays readable with plain git:

git -C .mem log --oneline
git -C .mem show <commit-hash>

Agent Workflow (always-on rules, root agents)

1. Before work — search. For repo-related tasks, extract 1–12 中英文关键词 → mem_search.
   Pure chat and general Q&A need no search.
2. Preselect results. Based on title / summary / keywords / score /
   matched_keywords, mem_read at most 5 most relevant memories; paginate with skip +
   the returned snapshot.
3. End-of-session checkpoint — the only write path. When the conversation is ending,
   mem_write every completed repo-related task that still lacks a memory and whose outcome is
   valuable/reusable (or was explicitly asked to be remembered). Never duplicate an
   already-written entry. Never write for pure Q&A, incomplete tasks, non-repo work, or purely
   operational git actions.
4. User correction. If a stored conclusion is outdated and a replacement exists →
   mem_replace (never delete-then-write). If it is obsolete with no replacement →
   mem_delete with a reason.
5. Subagent results. Only the root agent decides whether a session-level memory is written.

Development

npm install
npm run build    # tsc → lib/
npm test         # build + engine/plugin/migration unit tests (node:test)

Layout

dsh-gitmemo/
├── package.json          # npm package; dsh.bundle.patch wires the profile layer; bin: dsh-gitmemo
├── cordis.patch.yml      # composition layer: the dsh-gitmemo row
├── src/
│   ├── index.ts          # Cordis plugin: root-agent-scoped mem_* tools + workflow section
│   ├── mem.ts            # core engine (protocol, lock/journal, search, write/read/delete/replace)
│   ├── migrate.ts        # legacy migration (dry-run/apply, backup refs, CAS swap)
│   └── cli.ts            # `dsh-gitmemo migrate` CLI entry
├── lib/                  # built output (committed; used by file:/git installs)
└── test/mem.test.mjs     # engine + plugin + migration unit tests

License

MIT