Fireweed MCP server

fireweed-mcp

<!-- mcp-name: io.github.Starksood/fireweed-mcp -->

Agent memory where every fact carries a receipt.

remember(claim    = "Priya joined Acme in 2019 under duress.",
         evidence = "Priya Raman joined Acme in 2019 as a logistics analyst.")

REFUSED (asserts_more_than_evidence) — the claim adds something the evidence does not say.
  claim   : Priya joined Acme in 2019 under duress.
  evidence: Priya Raman joined Acme in 2019 as a logistics analyst.

recall("Priya's salary")

ABSTAINED (unknown_predicate) — no claims ground "salary"; 1 claim about Priya Raman exists
This is a refusal, not an empty result.

forget("Priya")

ERASED Priya Raman — certificate issued
  signature            : hmac-sha256:f4d0768ef3b0fec624afec12f25bfd91…
  nodes in closure     : 1
  every probe abstains : True
  bystanders surviving : 1

That last one is the artifact behind "delete me from your agent's memory — and prove it."

Install

uvx fireweed-mcp          # try it
pip install fireweed-mcp  # keep it

claude mcp add fireweed -- uvx fireweed-mcp

No dependencies. No API keys. No model — nothing in this server calls an LLM.

What it does

Why the refusals are the point

Most memory servers store what the model says and return what's nearest. This one adjudicates.

The rule is the model proposes, deterministic code decides. Across an RPC boundary that stops being a slogan: your agent is the proposer, and it cannot talk its way past the gate, because the gate is not a prompt. Pass a claim and the text you're quoting; pure functions check that the evidence names the subject, preserves the relation, invents no numbers, and asserts nothing the span doesn't say. What survives is stored with a byte range into the source.

Then anyone can check it afterwards — including someone who trusts neither your agent nor this server. That is the whole product.

What it does NOT do

Stated up front, because this project's last headline number turned out to be measuring nothing (see the retraction, which ships with a script that proves it):

Shortened. The full README is on GitHub.