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fish-bridge — Session Knowledge Graph MCP server

by MakeaMouse·io.github.MakeaMouse/fish-bridge-mcp·v0.1.3·2 stars
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Compresses AI chat sessions into a typed knowledge graph. Local/offline via Ollama.

B78/100grade B
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Safety scan
B78/100

full report

Adoption
New

2 stars17 downloads/wk

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If you have run it, two minutes of your experience saves the next person an afternoon.

fish-bridge — Session Knowledge Graph tools (9)

write = sends, deletes, buys or posts

Read from the package source without running it. The installed server may list more.

  • add_node

    Manually add a node to the session graph.

  • export_session

    Return the full session graph as a JSON string.

  • get_context

    Return the current compressed session context as XML.

  • get_focus

    Return a query-scoped subgraph context XML.

  • import_session

    Load a prior session graph and merge it into the current session.

  • list_deferred

    Return all deferred items in the current session as plain text.

  • mark_resolved

    Mark a question, task, or error as resolved.

  • record_turn

    Ingest one user/assistant exchange into the session graph.

  • show_active

    Return the active session thread as plain text (not XML).

Public scan report

scanner v0.1.9 · 2026-09-27 · same rubric, same numbers if you re-run it

no findings
  • Code scan43 source files scanned25/25
  • –Live reliabilityno gateway calls yet and no remote to proben/a
  • –Tool poisoningtools not inspected (local package is not executed); not countedn/a
  • Auth qualitystatic API keys via environment variables6/15
  • Maintenancelast push 59 days ago12/15
  • Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10
Overall 78/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How fish-bridge — Session Knowledge Graph compares

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
78/100
higher than 57% of 48,255 servers
Tools
9
the typical server has 7
Tools that change things
0%
typical: 0%. Fewer write tools means less an agent can break
GitHub stars
2
more than 75% of 28,688 servers
Downloads a week
17
more than 5% of 12,191 servers with a package

What its tools let an agent do: 6 read · 2 create · 1 change

Install fish-bridge — Session Knowledge Graph in Claude Code, Cursor or VS Code

claude mcp add fish-bridge-mcp -- uvx fish-bridge-mcp
Add to Cursor

What the publisher says

From the fish-bridge — Session Knowledge Graph repository's README, as published. We do not edit it. Read it on GitHub

fish_bridge

<!-- mcp-name: io.github.MakeaMouse/fish-bridge-mcp -->

Session-scoped knowledge graph engine for AI chat context compression.

Converts raw AI chat (40k+ tokens) into a compact typed knowledge graph (~300–800 tokens) and writes it to .github/copilot-instructions.md or CLAUDE.md — automatically included in every AI turn across all modes (ask, edit, agent). No MCP server required for the core workflow.

Raw session (40k tokens) → [fish_bridge] → Compressed graph (350 tokens)
                                              written to copilot-instructions.md
                                              picked up by every AI turn automatically

Install

Don't have uv? Get it first: curl -LsSf https://astral.sh/uv/install.sh | sh (macOS/Linux) or see uv docs. It replaces pip + pipx + pyenv in one tool — no virtualenv management needed.

Recommended — uv tool install (installs both the fish-bridge CLI and fish-bridge-mcp MCP server on your PATH):

# Local Ollama backend — free, offline (requires Ollama running)
uv tool install fish-bridge-mcp

# Gemini backend (~$0.0002/turn, ~95% quality — recommended cloud option)
uv tool install "fish-bridge-mcp[gemini]"
export GEMINI_API_KEY=...

# Claude backend (~$0.002/turn, ~97% quality)
uv tool install "fish-bridge-mcp[claude]"
export ANTHROPIC_API_KEY=sk-ant-...

# OpenAI backend (~$0.0003/turn, ~93% quality)
uv tool install "fish-bridge-mcp[openai]"
export OPENAI_API_KEY=sk-...

# Everything
uv tool install "fish-bridge-mcp[all]"

After install, two commands are available on your PATH:

  • fish-bridge — the main CLI (ingest, compile, show, serve, ...)
  • fish-bridge-mcp — the MCP server for VS Code agent mode

MCP config only (no permanent install needed): use uvx directly in your .vscode/mcp.json — it downloads and runs the MCP server on demand:

{ "command": "uvx", "args": ["fish-bridge-mcp"] }

See the MCP server section below for the full config.

Traditional pip install (for embedding fish-bridge as a library in your own Python project)

pip install fish-bridge-mcp
pip install "fish-bridge-mcp[gemini]"   # with Gemini backend
pip install "fish-bridge-mcp[claude]"   # with Claude backend
pip install "fish-bridge-mcp[all]"      # everything

2-minute quickstart

# 1. Initialize for your project
fish-bridge init --tool copilot --project ./

# 2. Ingest the latest Copilot session (auto-discovers JSONL on macOS/Linux/Windows)
fish-bridge ingest --source copilot

# 3. View the graph
fish-bridge show

# 4. Compile to your instructions file (done automatically after ingest)
fish-bridge compile

That's it. .github/copilot-instructions.md now contains a ~350-token compressed summary of your session, replacing raw history in every future turn.

Backends

Configure with:

fish-bridge config --backend gemini

Shortened. The full README is on GitHub.

Nothing above is checked by us. What we check is on the safety report.

fish-bridge — Session Knowledge Graph: common questions

Is fish-bridge — Session Knowledge Graph MCP server safe?
Mostly: it is graded B (78/100). Read the fish-bridge — Session Knowledge Graph safety report
How do I install fish-bridge — Session Knowledge Graph?
It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does fish-bridge — Session Knowledge Graph need an API key?
Yes. The registry entry asks for ANTHROPIC_API_KEY, OPENAI_API_KEY, GEMINI_API_KEY.
Is fish-bridge — Session Knowledge Graph maintained?
The last commit was 97 days ago (2026-07-30). The latest release is v0.1.3.
What can I use instead of fish-bridge — Session Knowledge Graph?
Servers from other publishers that do the same job: Codebase Memory MCP server and Neo4j Memory MCP server.
How does fish-bridge — Session Knowledge Graph compare with other MCP servers?
safety score 78/100 (higher than 57% of 48,255 servers); tools 9 (the typical server has 7); tools that change things 0% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.

Alternatives to fish-bridge — Session Knowledge Graph

Same job from other publishers: the closest match first, then the best rated.

  • Codebase Memory
    Codebase knowledge graph for AI agents — 162 languages, sub-ms queries, 99% fewer tokens.
    C
  • Neo4j Memory
    MCP Neo4j Knowledge Graph Memory Server
    A