WikiMoth

Connects the dots. The same way, every time.

wikimoth.com · pip install wikimoth

Deterministic, token-minimal, auditable memory for Claude and agents. Point WikiMoth at a folder of [[wikilink]] notes (an Obsidian vault, or Claude's own memory folder) and it follows the authored links to the answer flat search can't reach, shows you the exact note-chain behind it, and feeds the reader ~99% fewer tokens than pasting the whole vault. Pure markdown, no GPU, no vector DB, no LLM in the retrieval loop.

pip install wikimoth
wikimoth install      # capture: turn your Claude Code sessions into a [[wikilink]] vault
wikimoth serve        # browse the vault + see "what memory fed this answer"

Why not just let Claude manage its own context?

We benchmarked exactly that. An agent that browses the notes folder and prunes its own context reaches the same answers, multi-hop included (12/12 in our run). It just pays for it: 4 to 6 model round-trips and roughly 10x the billed tokens per question, because it re-sends a growing transcript every step. WikiMoth retrieves the same note-chain in one deterministic pass, no model in the loop, and shows you the exact notes behind the answer.

_{Real run, Claude Sonnet 4.6, 12 multi-hop questions on a reproducible vault. The ~10x counts a reader on both sides; it is corpus-specific, not a universal law. Reproduce it with python scripts/run_agentic_benchmark.py. Full breakdown in Honest limits.}

Why WikiMoth

Most agent memory is either paste the whole notes folder into context (expensive, and the model gets lost in the middle) or LLM-summarised similarity search (lossy, and non-deterministic: the same question can return different memory next week). WikiMoth takes a different bet: your notes are the store (plain markdown), the graph is authored (your [[wikilinks]], no embeddings to train or drift), and retrieval is code, not a model, so it's reproducible and you can read exactly why each note was chosen.

_{LLM Wiki follows links and skips the vector DB like WikiMoth, but an LLM writes and reads the wiki, so retrieval is agentic (an LLM call per recall, not reproducible), while its curated pages are richer. ~ = partial / not independently benchmarked.}

The edge is the combination, not higher recall: WikiMoth matches flat search on the basics and adds connect-the-dots + determinism + an audit trail + a plain-markdown store. See Honest limits for exactly where it ties and where it wins.

Compared to Karpathy's LLM Wiki

WikiMoth shares the substrate Andrej Karpathy's LLM Wiki pattern popularised: plain-markdown [[wikilink]] notes, no vector DB, but flips the engine. In the LLM-Wiki pattern an LLM writes and reads the wiki: rich, source-cited pages, but recall is agentic (it costs an LLM call and the path isn't reproducible). WikiMoth computes the edges in code and retrieves with a fixed algorithm, no LLM in the loop → the same note-chain every time, reproducible and auditable. They're complementary, not competing: point WikiMoth at a Karpathy-style wiki and you get deterministic multi-hop retrieval over it. (We don't claim to be "better" than the LLM Wiki: it curates richer pages; we retrieve deterministically.)

Quickstart (read)

from wikimoth import MemoryRAG, EchoReader

rag = MemoryRAG(reader=EchoReader())          # API-free default reader
rag.index("path/to/your/wikilink/vault")      # notes → ~400-token chunks, graph built

chunks, tokens = rag.retrieve("a connect-the-dots question?", top_k=8)
print(f"{len(chunks)} chunks, {tokens} tokens to feed the reader")

print(rag.answer("a connect-the-dots question?"))   # retrieve → compact → read

Swap in a real Claude answer (only touches the API when constructed):

from wikimoth import MemoryRAG, ClaudeReader
rag = MemoryRAG(reader=ClaudeReader(model="claude-sonnet-4-6"))   # needs ANTHROPIC_API_KEY

See what memory fed an answer: wikimoth serve

wikimoth serve                 # serves http://127.0.0.1:8765 (local-only)
wikimoth serve --vault PATH --port 8080

A zero-dependency local web viewer (pure stdlib, no Flask, no JS framework, no network):

• browse + search your notes,
• the authored [[wikilink]] graph (the same edges the retriever walks),
• and the one that matters, "what memory fed this answer": type a question and see the exact note-chain WikiMoth would feed a reader, with per-chunk hop distance, token counts, and the −N% vs dumping the whole vault. Retrieval only: no LLM call, no API key, deterministic.

Because the store is plain markdown, you can equally open the same vault in Obsidian or VS Code; the viewer is a convenience, not a lock-in.

In the agent loop: wikimoth mcp

wikimoth serve is for you. The MCP server is for the model: it exposes the same deterministic retrieval over the Model Context Protocol, so Claude calls it itself instead of you fetching context by hand.

# 1. install into the Python that runs your Claude Code
python -m pip install wikimoth

# 2. verify the command resolves (prints status, then exits)
python -m wikimoth status

# 3. register the MCP server with Claude Code
claude mcp add wikimoth -- python -m wikimoth mcp

Step 2 is the check that matters: if python -m wikimoth status prints a status line, then python -m wikimoth mcp will run for Claude too. Use the same python in all three steps (it is python3 on some systems); that is the one thing that has to match.

Prefer the Node world, or no Python set up? One line, no toolchain matching:

claude mcp add wikimoth -- npx -y wikimoth-mcp

The wikimoth-mcp launcher finds a Python that has WikiMoth (or uvx-installs one on the fly), injects the vault path so the server never reads an empty folder from the client's working directory, and passes the MCP channel through untouched. The same npx -y wikimoth-mcp works as the server command in any mcpServers config (Claude Desktop, Cursor, Windsurf); set WIKIMOTH_VAULT to your vault.

Now Claude has a recall(query) tool. Ask it something that lives in your notes and it calls recall; WikiMoth walks the [[links]] and hands back the exact note-chain (no LLM call to retrieve, token-minimal, the same result every time), and Claude answers from it. A status tool reports the connected vault. For any other MCP client, use python -m wikimoth mcp as the server command (stdio transport); point it at a specific vault with --vault PATH.

python -m wikimoth mcp is the portable form (it runs wherever the package is installed). The bare wikimoth mcp works too when the console script is on your PATH. It is pure stdlib: a hand-rolled JSON-RPC 2.0 stdio server, no MCP SDK dependency.

mcp-name: io.github.juliangeymonat-jpg/wikimoth

Capture: sessions → notes (the write half)

Retrieval needs a [[wikilink]] vault; hand-authoring one is the friction. wikimoth.capture builds it automatically by installing Claude Code lifecycle hooks that turn each session into one deterministic markdown note.

The invariant that matters: a note's [[wikilinks]] (the graph edges) are computed by code (string/path matching), never by a model. An LLM may optionally draft the summary prose (WIKIMOTH_LLM_PROSE=1), but any [[...]] it emits is stripped, never parsed as an edge. So the graph is reproducible (same session + vault → same edges) and auditable. Default capture is fully deterministic and makes zero API calls.

wikimoth install                 # writes 5 hooks into ./.claude/settings.json (absolute interpreter path)
wikimoth install --user          # ~/.claude/settings.json instead
wikimoth install --vault PATH    # choose where notes go (sets WIKIMOTH_VAULT)
wikimoth status                  # vault, note/session/buffer counts, hook state
wikimoth uninstall               # remove the hooks again

Lifecycle: SessionStart recalls recent sessions into context · UserPromptSubmit / PostToolUse buffer the session · Stop / SessionEnd write one note. The captured notes are exactly what the read pipeline indexes; capture and retrieval close the loop.

Keep memory honest: the hygiene suite

A memory that only grows rots. Notes go stale, two notes start disagreeing, the same fact gets saved twice, an old fact is replaced but never retired. Other agent-memory tools resolve this with an LLM that silently overwrites the old state. WikiMoth ships six commands that surface it deterministically, and never delete anything: git is your audit trail.

Three principles hold across all of them:

• Invalidate, don't delete. supersede marks a note superseded and links it to its replacement in frontmatter. The old body drops out of retrieval, but its [[link]] to the current note stays live, so a query that lands on the stale note hops free to the new one. Nothing is ever rm'd; the history lives in git.
• The tool never guesses. Every command emits candidates. The one judgement that isn't mechanical, deciding whether two notes truly contradict, is left to the calling model, never baked into the tool. So the output is reproducible and you can read exactly why each candidate was flagged.
• Bitemporal, no database. recall --as-of 2026-01-01 replays what the vault asserted on that date from frontmatter validity windows alone. No event log, no vector store, no migration.

Same invariants as the rest of WikiMoth: pure stdlib, deterministic (byte-identical output), read-only except the single supersede writer, plain markdown you can diff. The seven commands are also exposed over MCP (list_conflicts, list_lint, list_duplicates, list_fading, supersede, plus recall gaining as_of / show_superseded), so the agent can keep its own memory clean.

Install

WikiMoth's core is pure stdlib (dependencies = []): the retrieval engine, chunker, wikilink graph, pipeline and capture are all vendored under wikimoth/: nothing extra to install, no GPU, no vector DB.

pip install wikimoth
# optional extras:
pip install "wikimoth[hybrid]"          # optional BM25-seeded retriever variant
pip install "wikimoth[claude,tokens]"   # real Claude reader + exact tiktoken counts

Extras: hybrid = BM25-seeded retriever (rank_bm25) · claude = the anthropic reader · tokens = exact token counts (tiktoken) · dense = the dense benchmark baseline · headroom = reversible CCR compaction.

How it works

retrieve → compact → read. index() splits each note into ~400-token chunks (~50 overlap), keeping per-chunk note identity so the [[wikilink]] graph still connects across chunks (multi-hop at chunk granularity). GraphRetriever(source="wikilinks") seeds lexically, then walks the authored links, so a passage not lexically similar to the question but reachable by a link still gets pulled. An optional compaction stage (reversible CCR via chopratejas/headroom) shrinks passages further before the (paid) reader; it degrades to a no-op if headroom isn't installed.

A pure-navigation hub (a table-of-contents like MEMORY.md) can be indexed as graph edges only (exclude_content, default ("MEMORY.md",)): its [[links]] build edges and it stays a BFS waypoint, but its own chunks never reach the reader.

Every stage is constructor-injectable via MemoryRAG(retriever=…, compactor=…, reader=…), so you can swap the retriever (e.g. the BM25-seeded HybridRetriever), the compactor, or the reader.

Benchmark: tokens fed to the reader

wikimoth.benchmark.harness measures tokens fed to the reader (what you actually pay for) across arms over the same vault and questions:

No paid API calls run by default; every arm's reader defaults to the API-free EchoReader.

Honest limits

WikiMoth's value is deterministic, auditable, token-minimal, plain-markdown memory with a real multi-hop capability, not "better retrieval than BM25". Specifically:

• The −99% is vs dumping the vault (≈5k vs ~482k tokens on a real 356-note vault), not vs BM25: a tuned BM25-RAG also feeds ~5k. The win is against the realistic status quo (paste everything / naive whole-note RAG), and it's deterministic.
• On a typical real vault, retrieval ≈ BM25. Direct-lookup recall@8 ties at 1.00. The multi-hop / connect-the-dots win (0% → up to 100% where flat search scores zero) shows up on curated, link-heavy corpora; on an average vault, hybrid is never worse than BM25, not strictly better on recall.
• Determinism is inherent to any static retriever (BM25/dense too); WikiMoth's determinism win is specifically vs LLM-summarised memory (which varies run to run).
• vs letting the model prune its own context (the agentic arm, real run against Claude Sonnet 4.6, 12 multi-hop questions): the agent reaches the same answers, multi-hop included (12/12). The difference is cost. It takes 4 to 6 paid round-trips and about 10x the billed tokens per question, because it re-sends a growing transcript each step, where WikiMoth answers from one deterministic pass with no model call in the retrieval loop and an auditable note-chain. The multiple is corpus-specific, not a law. Reproduce it: python scripts/run_agentic_benchmark.py.

Pluggable + License

MemoryRAG(retriever=…, compactor=…, reader=…); defaults GraphRetriever(source="wikilinks") / NoOpCompactor / EchoReader. Anything satisfying the small Protocols drops in.

Apache-2.0; see LICENSE. © 2026 Julian Geymonat.