crabpath 9.0.0

Memory graph for AI agents that learns what to retrieve — and what to suppress.

CrabPath

Pure routing graph engine for context-aware retrieval. Core is zero dependencies and zero network; the caller supplies semantic and LLM callbacks.

1. CrabPath

CrabPath v8.0.0 is a deterministic graph engine that builds traversable context graphs and improves routing from feedback, without any external service requirement by default.

2. Design Tenets

• No network calls in core (not even for model downloads)
• No secret discovery (no dotfiles, no keychain, no env probing)
• No subprocess provider wrappers
• Embedder identity stored in state metadata (name, dim, schema_version); hard-fail on dimension mismatch
• One canonical state format (state.json)

3. Install

pip install crabpath
clawhub install crabpath         # ClawHub (for OpenClaw agents)

4. Quick Start (out of the box)

from crabpath import split_workspace, traverse, apply_outcome, VectorIndex, HashEmbedder

embedder = HashEmbedder()  # default hash-v1 (1024-dim)
graph, texts = split_workspace("./workspace")
index = VectorIndex()

for nid, content in texts.items():
    index.upsert(nid, embedder.embed(content))

query_vec = embedder.embed("how do I deploy to production?")
seeds = index.search(query_vec, top_k=8)
result = traverse(graph, seeds)
apply_outcome(graph, result.fired, outcome=1.0)

5. Real Embeddings via Caller Callbacks

from openai import OpenAI
from crabpath import split_workspace, VectorIndex
from crabpath._batch import batch_or_single_embed

client = OpenAI()

def embed_batch_fn(items):
    ids, contents = zip(*items)
    resp = client.embeddings.create(model="text-embedding-3-small", input=list(contents))
    vectors = {ids[i]: resp.data[i].embedding for i in range(len(ids))}
    if any(len(v) != 1536 for v in vectors.values()):
        raise ValueError("dimension mismatch: expected 1536")
    return vectors

graph, texts = split_workspace("./workspace")
index = VectorIndex()
vecs = batch_or_single_embed(list(texts.items()), embed_batch_fn=embed_batch_fn)
for nid, vec in vecs.items():
    index.upsert(nid, vec)

6. LLM Callbacks

from openai import OpenAI
from crabpath import split_workspace

client = OpenAI()

def llm_fn(system, user):
    resp = client.chat.completions.create(
        model="gpt-5-mini",
        messages=[{"role": "system", "content": system}, {"role": "user", "content": user}],
    )
    return resp.choices[0].message.content

# Pass to split for LLM chunking, or to query routes as needed
graph, texts = split_workspace("./workspace", llm_fn=llm_fn)

7. Session Replay (prominent)

Session replay is core in v8 and is the fastest way to warm-start a new brain from history.

from crabpath import replay_queries, split_workspace
from crabpath.replay import extract_queries_from_dir

graph, texts = split_workspace("./workspace")
queries = extract_queries_from_dir("./sessions/")
replay_queries(graph=graph, queries=queries)

Or via CLI:

crabpath init --workspace ./ws --output ./data --sessions ./sessions/
crabpath replay --state ./data/state.json --sessions ./sessions/

8. Three Embedding Tiers

Tier	Capability	Network	Notes
1	Default hash-v1	none	Built into core, zero deps, deterministic baseline
2	Semantic callback	optional	Caller-provided embed_fn / embed_batch_fn (OpenAI, Gemini, local service, etc.)
3	Replay	none	No new embedding calls; uses historical query signals and graph traversal history

9. Benchmarks

Reference benchmark (current repo) on CrabPath repo:

• Keyword R@3: 0.942
• Hash R@3: 0.933
• CrabPath R@3: 0.892
• CrabPath + replay R@3: 0.908

10. CLI

--state is the preferred API; --graph/--index are legacy compatibility flags.

crabpath init --workspace W --output O [--sessions S]
crabpath query TEXT --state S [--top N] [--json]
crabpath learn --state S --outcome N --fired-ids a,b,c
crabpath health --state S
crabpath replay --state S --sessions S
crabpath merge --state S
crabpath connect --state S
crabpath journal [--stats]

# Legacy
crabpath query TEXT --graph G [--index I] [--query-vector-stdin] [--top N] [--json]
crabpath learn --graph G --outcome N --fired-ids a,b,c [--json]
crabpath replay --graph G --sessions S
crabpath health --graph G
crabpath merge --graph G
crabpath connect --graph G

11. Reproduce Results

See REPRODUCE.md.

12. Paper

https://jonathangu.com/crabpath/

13. Status

• 8 deterministic simulations: all PASS
• 150 tests
• Production: 3 agent brains using real OpenAI embeddings