Rename the project to FieldCraft

Crates fieldcraft-*, binaries fieldcraft and fieldcraft-cli, the .fieldcraft file (format tag
fieldcraft/1, manifest fieldcraft.json), FIELDCRAFT_* environment variables, the MCP server
name, egui widget ids (fc_*), the app icon document FieldCraft.icon and its generated family,
docs and licences. No compatibility shim: no files of the earlier name exist.

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01NmAttHhUZTokgPeEJia8sm

tools/demo-video/README.md

@@ -16,10 +16,10 @@ It honours `CARGO_TARGET_DIR`.
 
 What it does:
 
-1. Builds `modelcraft`, `modelcraft-cli` and the testkit's `corpus` tool (release).
+1. Builds `fieldcraft`, `fieldcraft-cli` and the testkit's `corpus` tool (release).
 2. Writes the corpus I-beam (`tests/corpus/i-beam`) as a `.solidcraft` design to a temporary
    folder with `corpus --part i-beam --design`.
-3. Starts the app with `--control PORT` and `modelcraft-cli mcp --connect 127.0.0.1:PORT`, and
+3. Starts the app with `--control PORT` and `fieldcraft-cli mcp --connect 127.0.0.1:PORT`, and
    speaks MCP (JSON-RPC over stdio) to it. Every step is an MCP tool call: `open` the design,
    `mesh` (`hex_sweep`, 4 mm), `batch` (steel, a solid section, the root clamp, a kinematic
    coupling of the free end to a reference point loaded with 1000 N), `check_model`, `solve`

tools/demo-video/make.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python3
 """Regenerate the README demo video: an I-beam cantilever analysed by an agent over MCP.
 
-Every analysis step goes through the MCP server (`modelcraft-cli mcp --connect`), bridged to
+Every analysis step goes through the MCP server (`fieldcraft-cli mcp --connect`), bridged to
 the desktop app, and every frame is the app window captured offscreen through the MCP
 `screenshot` tool (`source: window`). See README.md beside this file.
 
@@ -54,7 +54,7 @@ def target_dir():
 
 def build():
     cargo = os.environ.get("CARGO", "cargo")
-    for args in (["-p", "modelcraft", "-p", "modelcraft-cli"], ["-p", "modelcraft-testkit", "--bin", "corpus"]):
+    for args in (["-p", "fieldcraft", "-p", "fieldcraft-cli"], ["-p", "fieldcraft-testkit", "--bin", "corpus"]):
         subprocess.run([cargo, "build", "--release", *args], cwd=ROOT, check=True)
 
 
@@ -78,7 +78,7 @@ def wait_for_port(port, app, timeout=180.0):
 
 
 class Mcp:
-    """A JSON-RPC client of `modelcraft-cli mcp` over stdio."""
+    """A JSON-RPC client of `fieldcraft-cli mcp` over stdio."""
 
     def __init__(self, cli, port):
         self.proc = subprocess.Popen(
@@ -258,7 +258,7 @@ def main():
     if not args.no_build:
         build()
     bin_dir = target_dir() / "release"
-    work = Path(tempfile.mkdtemp(prefix="modelcraft-demo-"))
+    work = Path(tempfile.mkdtemp(prefix="fieldcraft-demo-"))
     frames_dir = args.frames.resolve() if args.frames else work / "frames"
     frames_dir.mkdir(parents=True, exist_ok=True)
     design = work / "ibeam.solidcraft"
@@ -266,11 +266,11 @@ def main():
 
     port = free_port()
     app_log = open(work / "app.log", "w")
-    app = subprocess.Popen([str(bin_dir / "modelcraft"), "--control", str(port)], stdout=app_log, stderr=subprocess.STDOUT)
+    app = subprocess.Popen([str(bin_dir / "fieldcraft"), "--control", str(port)], stdout=app_log, stderr=subprocess.STDOUT)
     mcp = None
     try:
         wait_for_port(port, app)
-        mcp = Mcp(bin_dir / "modelcraft-cli", port)
+        mcp = Mcp(bin_dir / "fieldcraft-cli", port)
         film = Film(mcp, frames_dir)
         result = analyse(mcp, film, design)
         encode(film, frames_dir, args.out / "ibeam-analysis.mp4", args.out / "ibeam-analysis.gif")