diff --git a/.github/ISSUE_TEMPLATE/bug.yml b/.github/ISSUE_TEMPLATE/bug.yml
index aa6acfc..5edae76 100644
--- a/.github/ISSUE_TEMPLATE/bug.yml
+++ b/.github/ISSUE_TEMPLATE/bug.yml
@@ -41,6 +41,6 @@ body:
     id: version
     attributes:
       label: Version and platform
-      placeholder: "v0.1.0 (or commit), macOS 15 arm64"
+      placeholder: "v0.5.5 (or commit), macOS 15 arm64"
     validations:
       required: true
diff --git a/Cargo.lock b/Cargo.lock
index e24bf16..fcd26f6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1187,7 +1187,7 @@ checksum = "b97b65636e5b9ef369943878ac74335ba1c55c1cb6adbf1e2c293c624248d693"
 
 [[package]]
 name = "fieldcraft"
-version = "0.1.0"
+version = "0.5.5"
 dependencies = [
  "eframe",
  "egui",
@@ -1202,7 +1202,7 @@ dependencies = [
 
 [[package]]
 name = "fieldcraft-cli"
-version = "0.1.0"
+version = "0.5.5"
 dependencies = [
  "fieldcraft-engine",
  "fieldcraft-io",
@@ -1212,7 +1212,7 @@ dependencies = [
 
 [[package]]
 name = "fieldcraft-decks"
-version = "0.1.0"
+version = "0.5.5"
 dependencies = [
  "fieldcraft-model",
  "serde_json",
@@ -1221,7 +1221,7 @@ dependencies = [
 
 [[package]]
 name = "fieldcraft-engine"
-version = "0.1.0"
+version = "0.5.5"
 dependencies = [
  "fieldcraft-decks",
  "fieldcraft-explicit",
@@ -1243,7 +1243,7 @@ dependencies = [
 
 [[package]]
 name = "fieldcraft-explicit"
-version = "0.1.0"
+version = "0.5.5"
 dependencies = [
  "fieldcraft-fem",
  "fieldcraft-model",
@@ -1254,7 +1254,7 @@ dependencies = [
 
 [[package]]
 name = "fieldcraft-fem"
-version = "0.1.0"
+version = "0.5.5"
 dependencies = [
  "fieldcraft-model",
  "thiserror 2.0.21",
@@ -1262,7 +1262,7 @@ dependencies = [
 
 [[package]]
 name = "fieldcraft-geometry"
-version = "0.1.0"
+version = "0.5.5"
 dependencies = [
  "fieldcraft-model",
  "quick-xml",
@@ -1278,7 +1278,7 @@ dependencies = [
 
 [[package]]
 name = "fieldcraft-io"
-version = "0.1.0"
+version = "0.5.5"
 dependencies = [
  "fieldcraft-model",
  "log",
@@ -1291,7 +1291,7 @@ dependencies = [
 
 [[package]]
 name = "fieldcraft-lbm"
-version = "0.1.0"
+version = "0.5.5"
 dependencies = [
  "fieldcraft-mesh",
  "fieldcraft-model",
@@ -1301,7 +1301,7 @@ dependencies = [
 
 [[package]]
 name = "fieldcraft-mcp"
-version = "0.1.0"
+version = "0.5.5"
 dependencies = [
  "fieldcraft-engine",
  "fieldcraft-io",
@@ -1312,7 +1312,7 @@ dependencies = [
 
 [[package]]
 name = "fieldcraft-mesh"
-version = "0.1.0"
+version = "0.5.5"
 dependencies = [
  "fieldcraft-model",
  "num-bigint",
@@ -1324,7 +1324,7 @@ dependencies = [
 
 [[package]]
 name = "fieldcraft-model"
-version = "0.1.0"
+version = "0.5.5"
 dependencies = [
  "serde",
  "serde_json",
@@ -1333,14 +1333,14 @@ dependencies = [
 
 [[package]]
 name = "fieldcraft-parallel"
-version = "0.1.0"
+version = "0.5.5"
 dependencies = [
  "rayon",
 ]
 
 [[package]]
 name = "fieldcraft-render"
-version = "0.1.0"
+version = "0.5.5"
 dependencies = [
  "fieldcraft-model",
  "png",
@@ -1350,7 +1350,7 @@ dependencies = [
 
 [[package]]
 name = "fieldcraft-solver"
-version = "0.1.0"
+version = "0.5.5"
 dependencies = [
  "fieldcraft-fem",
  "fieldcraft-mesh",
@@ -1362,7 +1362,7 @@ dependencies = [
 
 [[package]]
 name = "fieldcraft-testkit"
-version = "0.1.0"
+version = "0.5.5"
 dependencies = [
  "fieldcraft-engine",
  "fieldcraft-geometry",
@@ -1373,7 +1373,7 @@ dependencies = [
 
 [[package]]
 name = "fieldcraft-ui-egui"
-version = "0.1.0"
+version = "0.5.5"
 dependencies = [
  "craft-ui",
  "egui",
@@ -4897,7 +4897,7 @@ checksum = "e450f9b2ed1dff33c94c12589a87338689467b9c4f5d8a5710bd09a847d2c8a7"
 
 [[package]]
 name = "xtask"
-version = "0.1.0"
+version = "0.5.5"
 dependencies = [
  "serde_json",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index cf8ecfd..c358b78 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,7 +3,7 @@ resolver = "3"
 members = ["crates/*", "apps/*", "xtask"]
 
 [workspace.package]
-version = "0.1.0"
+version = "0.5.5"
 edition = "2024"
 license = "MIT OR Apache-2.0"
 rust-version = "1.95"
diff --git a/docs/formats/fieldcraft.md b/docs/formats/fieldcraft.md
index 1e424cb..e9e007a 100644
--- a/docs/formats/fieldcraft.md
+++ b/docs/formats/fieldcraft.md
@@ -12,7 +12,7 @@ unzip tool reads them: `unzip -p bracket.fieldcraft model.json`):
 
 | Part | Content |
 |---|---|
-| `fieldcraft.json` | Manifest: `format` (`"fieldcraft/1"`), `generator` (`"FieldCraft 0.1.0"`), `geometry`, and `parts`: the byte size and SHA-256 of each other part. |
+| `fieldcraft.json` | Manifest: `format` (`"fieldcraft/1"`), `generator` (`"FieldCraft 0.5.5"`), `geometry`, and `parts`: the byte size and SHA-256 of each other part. |
 | `model.json` | The model definition: unit system, sets, materials, sections, reference points, couplings, boundary conditions, loads and steps. Pretty-printed JSON with a fixed key order (maps sorted by name), so a change shows as a line diff. Its form is the model's own JSON form, which commands take as parameters. |
 | `mesh.bin` | Nodes, elements and geometry tags, binary (below). |
 | `journal.json` | The commands that built the model, `[{"command": id, "params": {...}}, ...]`, one per line. It is a script `fieldcraft-cli run` replays. |