Adds two inline Python derivations to home/progs/pi.nix:
- ghidrecomp 0.5.9 (clearbluejar/ghidrecomp) — required by pyghidra-mcp,
not in nixpkgs.
- pyghidra-mcp 0.2.2 (clearbluejar/pyghidra-mcp) — headless MCP server
that exposes Ghidra's analysis primitives (decompile, disassemble,
list_strings, get_xrefs_to, etc.) over Model Context Protocol stdio.
The wrapper bakes in GHIDRA_INSTALL_DIR=${pkgs.ghidra}/lib/ghidra so
pyghidra discovers the Ghidra install at runtime without env munging.
Wires into OMP via:
- home.packages: pyghidra-mcp + pkgs.ghidra (GUI for occasional manual
exploration alongside the agent-driven flow).
- ~/.omp/agent/mcp.json: registers a 'ghidra' MCP server that spawns
pyghidra-mcp on stdio when any of its tools are invoked.
- ~/.omp/agent/skills/ghidra/SKILL.md: tells the agent when to reach
for Ghidra (static binary RE) vs. usbmon (dynamic capture) vs. the
built-in tools, and gives the canonical exploration workflow.
Replaces the previously-recommended LaurieWired/GhidraMCP, which has
been stale since June 2025. clearbluejar/pyghidra-mcp is actively
maintained (last commit 3 days ago), pure-Python via pyghidra+jpype, and
multi-binary capable in a single session.
Verified: pi.nix parses, the yarn NixOS closure evaluates, both
derivations build, and the wrapped binary's --help works (Ghidra runtime
discovered correctly via GHIDRA_INSTALL_DIR).
Simon Gardling
feae0f8002