Aletheia

A free, local memory and rules hub for AI coding tools.

Status: alpha. The memory engine and the installers work in tests. No host has been opened with a generated config yet, and answer accuracy is not measured. CI runs on Linux only; macOS and Windows are untested.

English · 中文 · Español · Português (Brasil) · 日本語 · Deutsch · Français · 한국어 · हिन्दी · العربية · Русский. Machine translations live in docs/i18n/; English is canonical. No translation has had native review.

What it is

Aletheia is a free, local memory and rules hub for AI coding tools. One SQLite store is read by any tool over MCP, REST or the CLI, and your rules are written into each tool's own instruction file.

Every coding agent forgets between sessions, and each one remembers differently. Aletheia keeps the memory and the rules once, on your machine, and lets each tool read them in the format it already understands. There is no account, no telemetry and no network call unless you configure a model provider. It listens on loopback only.

Related MCP server: nuzo-memory

Install in three commands

git clone https://github.com/mohamed-ashraf-elsaed/aletheia-mem
cd aletheia-mem
bun bin/aletheia-server.mjs

Open http://127.0.0.1:37790. Needs Bun 1.1 or newer. There is no npm install step because there are no runtime dependencies.

The first screen has four tabs: Work (Aletheia's own view of captured sessions, facts and goals), Memory (search, edit, pin, delete, export), Rules (write once and sync) and Tools (installer status and audit).

How capture works

aletheia install claude-code --write
aletheia install cursor --write
aletheia install --list          # capability level and verification per tool

Without --write the command is a dry run. It prints every file it would change and writes nothing. Each changed file gets a timestamped backup. Hooks call the installed aletheia command, redact secrets and <private> blocks before storing, spool to disk if the database is unavailable, and always exit 0 so they never block the host. Compression is queued, not run inside the hook. Details and the exact hook list per host: docs/25.

Which tools it connects to

Aletheia does not depend on any one tool. It speaks MCP (stdio and HTTP), a plain REST API and a CLI, and it writes the instruction file each tool already reads. What has and has not been checked:

Generated from src/hub/install.mjs via aletheia install --list. A row says tested on a real install only when that column says so; today none do.

Measured numbers

On LoCoMo, claude-mem 15.2.0 as shipped vs this project. These are retrieval numbers, not answer accuracy.

Retrieval only: Recall@5 asks whether the gold evidence is in the top five results. It is not answer accuracy. Every row is measured-by-us on the same LoCoMo questions; no vendor-claimed benchmark number is in this table. Generated from bench/results/2026-10-26/ (docs/14 §14.6, raw-turns.json (hybrid), dataset-facts.json (hybrid+facts), dataset-facts-3-rerank.json (hybrid+facts), dataset-facts-3-rerank.json (hybrid+facts+rerank), dataset-facts-rerank.json (hybrid+facts+rerank), our-facts-rules.json (hybrid+facts)); re-run with bun scripts/compare-bench.mjs.

Read the table this way:

• Recall@5 is retrieval. It asks whether the gold evidence is in the top five results. It is not a judgment of whether an answer was right.

• Answer accuracy is not measured. There is no reader or judge harness yet (T-051).

• The gap is not 2× when both systems receive the same extracted facts. The speed difference is larger than the quality difference.

• The first local extraction run failed. Ollama llama3.2:1b answered a trivial call, but the facts-v1 prompt over a two-turn window returned HTTP 500 after 4 min 41 s. No fact was extracted from that run.

• Our rule extractor does not reproduce the fact gain. It added 1,672 facts and moved Recall@5 from 57.3% to 57.7%; the dataset's own facts added 7.3 points. Method, raw files and the negative result: docs/22.

How it compares

Generated from docs/28-competitor-report.json (rows copied from docs/21-competitor-landscape.md, fetched 2026-10-26). Aletheia cells updated 2026-10-26 from validated tasks; see docs/20 and docs/25. Cells the source did not state read UNVERIFIED.

Sync and remote MCP

Both are self-hosted and free; neither is tested across two real machines.

• Aletheia Sync is an append-only operation log with one result per operation, device pairing, tombstones, compaction, purge and scoped tokens. Optional end-to-end encryption encrypts payloads on the device before they are sent; it does not hide metadata such as device id, operation kind, entity id, timing or ciphertext size. Unencrypted accounts keep plaintext payloads on the hub. Tested on loopback only. docs/29

• Remote MCP serves the read tools (and, with a sync or admin token, the write tools) over the MCP Streamable HTTP transport. Each call needs a bearer token, is rate-limited and is written to an append-only audit row. TLS is delegated to a reverse proxy or tunnel; OAuth is not built (T-111). docs/30

Interfaces

Configuration

All settings are environment variables. The defaults are safe for a single-user machine.

Limits and unverified claims

This list is the honest half of the README. Every item is tracked in docs/tasks/unverified.md.

• No config has been run inside its host application. "Config written from docs, not tested on a real install."

• CI and the benchmark run on Linux only. macOS and Windows are untested.

• Answer accuracy is not measured. Recall@5 is retrieval, not whether an answer was correct.

• The 1B-model extraction run failed; facts from our own extractor were measured with the rule extractor only.

• Sync and E2EE are tested with temp data dirs and a loopback hub. No real tunnel or second host was used.

• E2EE covers payloads, not metadata.

• At 50,000 rows, keyword search p95 was 108.1 ms after an FTS fix; the 50 ms target is not met.

• The 10 README translations are machine-translated. No native speaker has reviewed them.

• "Works with " is not claimed for any tool. Only a real install test would justify it.

Layout

bin/            server, CLI, MCP server, sync hub, legacy Work ledger CLI
src/
  server.mjs app.mjs source.mjs config.mjs humancopy.mjs      server and the legacy Work API
  readmodel/ ledger/ refresh/ store/ http/                     legacy Work internals
  hub/            store (memories, FTS5, rules, bundles)  rules-sync  tools  importers  capture  compress  mcp  routes  sync
public/         the one UI (index.html, one-ui.*, tabs/, work-view.js);
                work.html and assets/ are the optional legacy viewer
public-hub/     the old Memory Hub assets, still served at /hub/app.js
prompts/ vendor/ the original's skill prompts and Python scripts
test/           the test suite and a synthetic fixture database
docs/           the documents

Documents

1. Architecture · 2. Data model · 3. HTTP API · 4. Read model · 5. Refresh pipeline · 6. Frontend · 7. Operations · 8. Findings · 9. Verification · 10. Rebuild guide

2. Feature inventory vs claude-mem · Product

3. Research and measured results · Product spec · Target architecture · Technical tasks · Benchmark plan

4. Feature matrix · Competitor landscape · Improve the numbers · Memory building

5. Repository parity · Installers · Memory pipeline · Free paid parity

6. Competitor report · Sync · Remote MCP

Contributing

The most useful contribution is a report from a real install: open an issue with the tool, its version, the command you ran and what the tool did. See CONTRIBUTING.md and the task system in docs/tasks/TASKS.md. Run bun test, bun scripts/check-tasks.mjs and bun scripts/gen-tables.mjs --check before a pull request. A new runtime dependency needs a reason.

Licence

Apache-2.0. See NOTICE.md for what comes from claude-mem. Not affiliated with or endorsed by the claude-mem authors or Anthropic.