# Fireweed

Fireweed stores claims with source evidence, rejects unsupported details, and can certify erasure. It suits agent workflows where you need to audit what entered memory.

- MCP server · `type=mcp` · Claude Code, Codex, Cursor, GitHub Copilot, Windsurf (Devin Desktop), Cline, Zed, Gemini CLI · ★ 5
- Author: Starksood
- License: not stated · policy=link-only · description only; the file stays with the author
- Source: https://github.com/Starksood/fireweed-mcp
- Updated: 2026-08-28
- HTML: https://affpapa.org/en/nevibecode/mcp/fireweed

## What it does

An agent sends `remember` a claim and the text meant to support it. Deterministic checks reject claims that add details beyond the cited passage; accepted records retain the source byte range. `verify_receipts` rechecks source content, while `trace_evidence` follows a record back to the document and ledger event.

\`recall` returns grounded records or abstains when it cannot support an answer. Retrieval is a real limitation: in the reported test with unseen question phrasings, the default install refused 99.2% of queries. `forget` removes records and issues a signed certificate; `export_memory` produces a portable open-format store. The server does not extract facts from free text on its own. An agent must supply claims and evidence.

Install it with `uvx`; no API key or model is needed, and the server does not call an LLM. Data lives in `~/.fireweed/mcp/`, configurable through `FIREWEED_MCP_STORE`. Avoid `fireweed-mcp[semantic]`: on absent-answer tests, correct refusals fell from 96.1% to 32.8%.

## Requirements
- Needs: Python and uv (commands run via uvx)

## Install

### Claude Code (native platform)

**Platform CLI**
```bash
claude mcp add fireweed-mcp -- uvx fireweed-mcp
```
uvx runs the command named after the package; if the README names another one, use uvx --from fireweed-mcp <command>

### Codex

**Platform CLI**
```bash
codex mcp add fireweed -- uvx fireweed-mcp
```
uvx runs the command named after the package; if the README names another one, use uvx --from fireweed-mcp <command>

### Cursor

**Config file**
File `.cursor/mcp.json`:
```json
{
    "mcpServers": {
        "fireweed": {
            "command": "uvx",
            "args": [
                "fireweed-mcp"
            ]
        }
    }
}
```
uvx runs the command named after the package; if the README names another one, use uvx --from fireweed-mcp <command>

### GitHub Copilot

**Config file**
File `.vscode/mcp.json`:
```json
{
    "servers": {
        "fireweed": {
            "type": "stdio",
            "command": "uvx",
            "args": [
                "fireweed-mcp"
            ]
        }
    }
}
```
uvx runs the command named after the package; if the README names another one, use uvx --from fireweed-mcp <command>

### Gemini CLI

**Platform CLI**
```bash
gemini mcp add fireweed uvx fireweed-mcp
```
uvx runs the command named after the package; if the README names another one, use uvx --from fireweed-mcp <command>

## When to use it
- store a claim only when its cited passage supports it
- check whether source bytes have changed since a fact was recorded
- trace a memory back to its source document and ledger event
- erase a person's records and obtain a signed certificate
- export the memory store in a portable open format

## Example prompts
- Save the claim that Priya Raman joined Acme as a logistics analyst in 2019, with a passage that supports it.
- Check whether the memory contains evidence about Priya's salary, and abstain if the source does not support an answer.
- Remove Priya's records from memory and return the erasure certificate.

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