Memmachine Memmachine Memmachine

MemMachine Memory

Overview

Use MemMachine as durable context storage when the current prompt or conversation does not contain enough prior project, user, or session context. When this skill is loaded for retrieval, the first evidence-gathering action must be a MemMachine query through mem-cli, not grep, rg, find, ls, or manual repository browsing.

Repository search answers questions about files that exist now. MemMachine answers questions about remembered decisions, preferences, session context, and historical facts. Do not use repository search as a substitute for memory retrieval.

Retrieve with simple queries, check whether each result is sufficient, and only continue querying for the next missing fact.

mem-cli is exposed by the installed console command. If that command is unavailable in the current environment, run the module entry point through the project Python environment.

Setup Check

Before memory operations, make sure the CLI has server and project context. Load configuration in this order:

1. Explicit command arguments provided by the user or calling workflow.
2. Values present in references/configuration.md.
3. Existing environment variables.

When references/configuration.md exists and contains a fenced json block, read that JSON before running mem-cli. Use any configured values as explicit CLI arguments, so the command does not depend on ambient shell environment. Do not print or summarize secret values such as API keys.

Required configuration keys:

• MEMORY_BACKEND_URL
• MEMMACHINE_API_KEY
• MEMMACHINE_ORG_ID
• MEMMACHINE_PROJECT_ID

Equivalent command arguments:

• --base-url for MEMORY_BACKEND_URL
• --api-key for MEMMACHINE_API_KEY
• --org-id for MEMMACHINE_ORG_ID
• --project-id for MEMMACHINE_PROJECT_ID

Place global client arguments before the command, and place project context arguments on the project or memory subcommand:

mem-cli --base-url "<MEMORY_BACKEND_URL>" --api-key "<MEMMACHINE_API_KEY>" \
  memory search "user preference for Python testing" \
  --org-id "<MEMMACHINE_ORG_ID>" --project-id "<MEMMACHINE_PROJECT_ID>" --limit 5

Useful checks:

mem-cli health
mem-cli projects get \
  --org-id "<MEMMACHINE_ORG_ID>" --project-id "<MEMMACHINE_PROJECT_ID>"

Fallback when the console command is unavailable:

uv run python -m memmachine_client.cli health

Retrieval Workflow

1. Decide whether this is a retrieval use of the skill. If the task depends on prior user preferences, project decisions, historical facts, session context, or context not available in the current conversation, retrieval is needed.
2. Before running grep, rg, find, broad ls, or other local search for that prior context, run one MemMachine search. Local search may follow only to inspect current code or validate file-level facts after memory has been queried.
3. Write one simple query. A simple query asks for one fact, entity, decision, preference, or relationship.
4. Run the query with a small limit first.
5. Inspect the returned JSON. Use only retrieved content as memory evidence.
6. Decide whether the evidence is sufficient for the original need.
7. Stop when sufficient. If insufficient, form the next simple query for the missing fact and repeat.

Command shape:

mem-cli memory search "user preference for Python testing" --limit 5

If the skill has explicit context, include it in the command rather than relying on ambient environment:

mem-cli memory search "user preference for Python testing" \
  --org-id "<MEMMACHINE_ORG_ID>" --project-id "<MEMMACHINE_PROJECT_ID>" --limit 5

Use --agent-mode only when the user asks for richer retrieval behavior or simple direct retrieval repeatedly fails:

mem-cli memory search "project decision about retrieval agent limits" --limit 5 --agent-mode

If mem-cli is unavailable, try the module fallback before using local search as an alternative:

uv run python -m memmachine_client.cli memory search "user preferred test runner" --limit 5

Simple Query Rule

Keep each retrieval query single-hop and directly answerable:

• Good: user preferred test runner
• Good: project decision about memory query decomposition
• Good: database migration rollback policy
• Avoid: compare all previous architecture decisions and tell me which ones affect the current bug
• Avoid: summarize everything about user preferences, deployment, testing, and API design

If the needed context is complex, decompose it before searching. Split by entity, attribute, timeframe, or missing reasoning step. Do not put operations such as compare, rank, summarize, average, difference, top, or full coverage in the sub-query unless the exact stored memory is expected to contain that phrase.

Example decomposition:

Original need: "Does the user's preferred deployment setup conflict with the project's last API authentication decision?"

Simple queries:

user preferred deployment setup
project last API authentication decision

After each query, check sufficiency:

• Does the result explicitly answer the sub-question?
• Does it include the needed entity, value, date, or constraint?
• Is it current enough for the task?
• Does it reduce the missing context, or is another simple query needed?

Adding Memory

Add memory only when the user explicitly asks to remember something, when a project workflow requires durable context, or when saving a stable preference or decision will help future agents. Do not save transient scratch work, secrets, credentials, unverified guesses, or large raw outputs.

Write memory as concise, self-contained content:

mem-cli memory add "User prefers pytest tests to be run with uv run pytest." --metadata kind=preference

Include explicit context when the calling skill has it:

mem-cli memory add "User prefers pytest tests to be run with uv run pytest." \
  --org-id "<MEMMACHINE_ORG_ID>" --project-id "<MEMMACHINE_PROJECT_ID>" \
  --metadata kind=preference

Use metadata when it will help future retrieval:

mem-cli memory add "Decision: retrieval queries should be decomposed into simple single-hop searches before broad searches." --metadata kind=decision --metadata area=retrieval

Evidence Discipline

Treat retrieved memory as context, not proof that the world is currently true. If the task is high-stakes, time-sensitive, or externally verifiable, combine memory with the appropriate source of truth. Report uncertainty when retrieved memory is partial, stale, contradictory, or absent.

Do not keep querying indefinitely. If three simple queries do not retrieve sufficient context, proceed with an explicit assumption or ask the user for the missing information.

Source: MemMachine/MemMachine — distributed by TomeVault.