Subconscious MCP Server

Local-first semantic memory for MCP agents. Recall, remember, forget, echo, drift, stats over stdio.

Publisher claimed. No tool list reported, and Pod has not connected to this server.

Status

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Published as subconscious-mcp on pypi. Runs locally.

Known issues

12 problems reported by people outside the maintainer team. Issues filed by the project's own owners, members and collaborators are excluded — those are release checklists and internal refactors, not things that will go wrong for you. Showing 9.

Most discussed

Add purge_expired(): expired entries are never deleted

TTL works as filter-at-read: expired entries stop matching but stay in ChromaDB forever. docs/architecture.md admits "storage grows monotonically until a future purge_expired() is added."

Proposed: Memory.purge_expired() deleting all entries with 0 < expires_at <= now, returning {"purged": n}. Decide and justify whether to expose it as a seventh MCP tool or keep it library-side (lean: expose it; agents that set TTLs should be able to clean up).

Acceptance:

Unit tests (can be fast-lan

Read the thread · 2026-06-11 · open · 1 comment

Tag filtering in recall and echo

remember(task, answer, tags=["work"]) stores tags today (memory.py writes tags_json metadata) and recall/echo return them, but nothing can filter by them. The docstring in tools.py has promised "future filtering" since v0.1.0. Time to deliver.

Proposed: recall(task, threshold, top_k, tags=None) and echo(task, top_k, tags=None) where tags means "candidate must carry at least one of these".

Design note: tags are stored as a JSON string in ChromaDB metadata, and Chroma where f

Read the thread · 2026-06-11 · closed · 1 comment

Share one model instance across the test suite (5 min suite to under 1 min)

The full suite takes about 5 minutes because every test builds a fresh Memory via the memory fixture (tests/conftest.py), and each Memory lazily loads sentence-transformers (about 5s per load, about 20 embedding tests).

The model is stateless across tests; only the ChromaDB collection needs to be fresh. Ideas (pick one, or propose better):

Session-scoped encoder fixture injected into per-test Memory instances
Module-level encoder cache keyed by model name inside Memory (also spe

Read the thread · 2026-06-11 · open · 1 comment

Add a type checker (pyright) to CI

The codebase is fully type-hinted but nothing enforces it; a wrong annotation would ship silently. Add pyright (basic mode) to the dev extras and the CI lint job.

Acceptance:

pyright src/ passes locally and in CI
Any genuine type errors it surfaces are fixed in the same PR (expect a handful of ChromaDB Any-typed returns to need narrowing or targeted ignores)
CONTRIBUTING.md style section mentions it

Read the thread · 2026-06-11 · open · 0 comments

Optional max_entries cap with eviction policy

The ChromaDB collection grows without bound: TTL expiry is filter-at-read (see the purge_expired issue) and nothing limits total entries. For a long-running agent this means unbounded disk growth and, at large scale, growing HNSW index memory.

Proposed: a max_entries config key (default null, meaning unlimited, preserving current behaviour). When a remember() would exceed the cap, evict. Eviction policy is the design question:

LRU by last-hit time (needs per-entry hit tracking; the echo log

Read the thread · 2026-06-11 · open · 0 comments

Most recent

Streamable HTTP transport

stdio only today. FastMCP supports streamable HTTP; exposing it makes the server usable from remote MCP clients and shared dev-team setups.

Proposed: subconscious-mcp --transport http --host 127.0.0.1 --port 8473 (default remains stdio; default host loopback only).

Scope notes:

Local-first stays the default story; HTTP mode is opt-in
No auth in v1 of this feature; bind loopback and say so loudly in docs. A token header can be a follow-up
--print-config should report the transport

Read the thread · 2026-06-11 · open · 0 comments

Multi-answer per cluster: the first-fill drift mitigation

Background: the validation study (validation/results.md) surfaced first-fill semantic drift, and v0.2.0 ships detection (drift_report). This issue is the next step: mitigation by storage design.

Idea: instead of one answer per entry, allow a cluster to hold multiple (task_text, answer) variants. At recall time, pick the variant whose task_text is most similar to the query (a second, cheap nearest-neighbour comparison within the cluster), not just the cluster centroid's answer.

Open questio

Read the thread · 2026-06-11 · open · 0 comments

Claude Code hooks: ambient memory (auto-recall on session start, auto-remember on stop)

Today an agent only benefits from memory if it chooses to call recall. Mostly it will not. Claude Code hooks can make memory ambient:

SessionStart hook: recall against the session's opening context, inject any strong hit as context
Stop hook: distill what the session accomplished into one or more remember calls
Optionally PreToolUse on expensive tools: echo first, surface "you have done something similar"

Deliverable shape: a hooks/ directory with the hook scripts plus a README sec

Read the thread · 2026-06-11 · open · 0 comments

serverInfo.version reports the FastMCP framework version, not ours

When an MCP client calls initialize, the response says "serverInfo": {"name": "subconscious-mcp", "version": "1.27.1"}. That 1.27.1 is the FastMCP framework version. Our package version (0.2.0) is what clients should see.

Cause: src/subconscious_mcp/server.py line 33 constructs FastMCP("subconscious-mcp") without passing a version. We already import __version__ in that file for the CLI flag.

Acceptance:

initialize over real stdio reports the package version (check with `examples/

Read the thread · 2026-06-11 · closed · 0 comments

See all 12 reports Pod holds for Subconscious.

Firsthand observations

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