claude-fafm-sdk

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Home: faf.one/memory · Blog: Forgettable Memory

Portable, cross-vendor AI memory in .fafm. Give an AI agent memory that versions with your project and moves between models — instead of being locked to one vendor.

What's New in 2.1.0 — The FastMCP 4 Edition

FastMCP 4 is now the floor. The optional [namepoint] extra requires fastmcp>=4.0.0 — the FAF Python family standard.

The offline-first core is untouched — no new deps, no API change, the lattice is unchanged. client.py's Client + StreamableHttpTransport pattern works as-is on FastMCP 4 (the MCPaaS calls are plain reads/writes, so the mode="auto" default is fine); no httpx in source, so httpx → httpx2 is a non-event. pydantic>=2.12 arrives transitively only when [namepoint] is installed.

Key features (1.5–2.0)

• Soul.forget / CLI forget — delete is state; both roads
• policy · debt · risk-scan — policies emit tombstones; visible debt; residual honesty
• compact / migrate — pay debt safely; cross-epoch refuses (or explicit migrate)
• Tombstone ≠ secure erase · compact ≠ wipe — lattice honesty bounds
• Verifiable Provenance (1.4) — optional Ed25519 ([sign] extra)
• Provable · Sendable · Mergeable (1.3 → 1.1)

Arc: Mergeable → Sendable → Provable → Verifiable → Forgettable → policy · debt → Compactable

Full detail: CHANGELOG · TESTING · MERGE §11 · faf.one/blog/forgettable-memory

uvx claude-fafm-sdk --version          # → 2.1.0
uvx claude-fafm-sdk forget --help
claude-fafm-sdk debt -f soul.fafm
claude-fafm-sdk compact --epoch -f soul.fafm --at 2026-07-31T12:00:00Z --archive soul.e0.fafm
claude-fafm-sdk migrate --to 1 --mode project-live -f soul.fafm --at 2026-07-31T12:00:00Z --archive pre.fafm
claude-fafm-sdk seal -f soul.fafm -o out.fafmp   # epoch + tombstones ride the packet

Offline-first: the local Soul works with no account. Connect a free namepoint for the full intel (semantic recall, smart-merge) at personal scale.

Two profiles, one .fafm format. This is the knowledge profile (typed, cross-linked agent memory). For the voice profile — the Voice Memory Layer — see grok-faf-voice.

Install

uv add claude-fafm-sdk                 # in a project (recommended)
pip3 install claude-fafm-sdk==2.1.0    # pin the front door you expect
# optional provenance:
pip3 install 'claude-fafm-sdk[sign]==2.1.0'
# optional hosted namepoint client:
uv add "claude-fafm-sdk[namepoint]"

30 seconds

New here? One guided command takes you soul → live → cross-vendor:

uvx claude-fafm-sdk quickstart           # 🧬 guided first-run (the 30-second wow)

Or drive it yourself:

uvx claude-fafm-sdk init                 # 🧬 create a portable soul
claude-fafm-sdk etch "ships uv-first"    # write a memory
claude-fafm-sdk recall uv                # recall it  (filters: --tag --type --priority)
claude-fafm-sdk ls                       # list every fact, ranked
claude-fafm-sdk forget install           # convergent delete by id (tombstone)
claude-fafm-sdk debt                     # visible tombstone debt
claude-fafm-sdk compact --epoch --at … --archive …   # pay debt (2.0)

Core loop — init, etch, recall, ls, forget — plus policy, debt, risk-scan, compact, migrate. Run claude-fafm-sdk --help for the full surface.

Hand soul.fafm to grok-faf-voice and it reads it — same format, no fork.

How it works

from claude_fafm_sdk import Soul

soul = Soul("@me")
soul.etch("ships uv-first", id="install", type="reference", priority="high")
soul.etch("portable across vendors", id="why", type="project")
soul.forget("install")          # tombstone — merge will not resurrect
soul.save("me.fafm")            # → application/vnd.fafm+yaml

# later, anywhere:
soul = Soul.load("me.fafm")
soul.recall("uv")               # deterministic recall, ranked by priority + recency

That's the whole offline loop — no account, no server. Deletes travel as state (tombstones) so peers converge without lying about the join.

More in examples/ — portability + a real cross-vendor roundtrip (SDK writes .fafm, grok-faf-voice reads it back).

Interop contract (v1.0): INTEROP.md — timestamps, priority/rank, id collision, unknown fields, index, scratchpad/ledger boundary.
Merge + tombstones: MERGE.md · Packets: PACKET.md · Provenance: PROVENANCE.md
Testing (ship law): TESTING.md — we break it here so they never know it was broken.

Go cross-vendor (a namepoint)

A namepoint is your soul's live address — mcpaas.live/<handle> — readable by Grok and any model. Zero-config: just push. With no setup, the first push auto-provisions an anonymous namepoint and saves it locally — no claim page, no key to copy.

uv add "claude-fafm-sdk[namepoint]"      # hosted ops use the family MCP client
claude-fafm-sdk namepoint push           # → live at mcpaas.live/anon… (auto-provisioned)
claude-fafm-sdk namepoint pull           # merge via CvRDT (forget converges)
claude-fafm-sdk namepoint sync           # reconcile both ways

A-for-first-touch, B-for-keepers. The anonymous namepoint is session-like — lose this machine and it orphans (a reminder of the statelessness memory cures). Make it permanent + recoverable:

claude-fafm-sdk namepoint claim --email you@example.com   # a named, recoverable namepoint
claude-fafm-sdk namepoint status                           # what you've got

The whole .fafm document is stored at the namepoint, so ids, types, priorities, and tombstones survive the round-trip — structured memory, not prose. Reads are public (no key); writes use the key auto-provisioning hands you. The local Soul still works fully offline, no account.

Programmatic access mirrors the CLI:

from claude_fafm_sdk import Namepoint, Soul, provision_anonymous

soul = Soul.load("soul.fafm")
ident = provision_anonymous()                       # {namepoint, key}, zero-config
await Namepoint(ident.namepoint, api_key=ident.api_key).replace(soul.to_yaml())
body = await Namepoint(ident.namepoint).pull()      # reads are public — no key

Why

AI memory is vendor-locked. .fafm is the open, portable format — and this SDK is the open, offline-first way to use it. Souls written here interop with the fafm-engine and grok-faf-voice implementations: one format, never a fork. Memory that grows, moves, proves, signs — and can forget without resurrecting on join.

Citation

If you use claude-fafm-sdk or the .fafm format in research or production, please cite the format paper:

Wolfe, J. (2026). Permanent Memory and Instant Recall: The .fafm Standard for Multi-Profile AI Agent Memory. Zenodo. https://doi.org/10.5281/zenodo.20348942

BibTeX

@article{wolfe2026fafm,
  title     = {Permanent Memory and Instant Recall: The .fafm Standard for Multi-Profile AI Agent Memory},
  author    = {Wolfe, James},
  year      = {2026},
  month     = {may},
  publisher = {Zenodo},
  doi       = {10.5281/zenodo.20348942},
  url       = {https://doi.org/10.5281/zenodo.20348942}
}

DOI: 10.5281/zenodo.20348942

License

MIT. The format is open (spec); the SDK is open; the at-scale intel + hosting is the paid tier.