chore: the metadata crates.io needs, and a README for each crate

crates/xtce-cli/Cargo.toml

@@ -1,6 +1,9 @@
 [package]
 name = "xtce-cli"
 description = "Command-line tools for inspecting and decoding CCSDS telemetry defined by XTCE"
+readme = "README.md"
+keywords = ["xtce", "ccsds", "telemetry", "spacecraft", "cli"]
+categories = ["aerospace::space-protocols", "command-line-utilities"]
 version.workspace = true
 edition.workspace = true
 rust-version.workspace = true

crates/xtce-cli/README.md

@@ -0,0 +1,14 @@
+# xtce-cli
+
+The `xtce` command: inspect an XTCE definition and decode a CCSDS stream against it.
+
+```console
+$ xtce info mission.xml                      # what it contains, and what cannot be decoded
+$ xtce decode mission.xml downlink.dat       # values, as a table or as JSON lines
+$ xtce decode mission.xml downlink.dat --param 'ADGPSPOS*'
+```
+
+`--param` takes a glob, and a value matching nothing in the definition is an error naming the
+nearest parameter rather than an empty report.
+
+Part of [RustSpaceLab/xtce-rs](https://github.com/RustSpaceLab/xtce-rs).

crates/xtce-codegen/Cargo.toml

@@ -1,6 +1,9 @@
 [package]
 name = "xtce-codegen"
 description = "Compile an XTCE telemetry definition into a static Rust decoder"
+readme = "README.md"
+keywords = ["xtce", "ccsds", "telemetry", "codegen", "spacecraft"]
+categories = ["aerospace::space-protocols", "development-tools"]
 version.workspace = true
 edition.workspace = true
 rust-version.workspace = true

crates/xtce-codegen/README.md

@@ -0,0 +1,14 @@
+# xtce-codegen
+
+Compiles an XTCE definition into a `struct` per container whose `decode` is a sequence of
+loads, shifts and masks with every offset already a literal. Nothing consults the XTCE model at
+run time.
+
+Measured against the interpreted decoder in the same repository on the same 7 200-packet
+stream: roughly 100× it, which is about 11 000× the Python reference.
+
+Refusals are fatal by design. A construct the generator cannot compile is refused with the
+element named, rather than falling back to interpretation — a silent fallback would make the
+measurement above meaningless.
+
+Part of [RustSpaceLab/xtce-rs](https://github.com/RustSpaceLab/xtce-rs).

crates/xtce-decode/Cargo.toml

@@ -1,6 +1,9 @@
 [package]
 name = "xtce-decode"
 description = "Decode CCSDS telemetry packets against an XTCE definition"
+readme = "README.md"
+keywords = ["xtce", "ccsds", "telemetry", "spacecraft", "decoder"]
+categories = ["aerospace::space-protocols", "encoding"]
 version.workspace = true
 edition.workspace = true
 rust-version.workspace = true

crates/xtce-decode/README.md

@@ -0,0 +1,19 @@
+# xtce-decode
+
+Decodes CCSDS space packets against an XTCE definition, and is tested the only way that means
+anything: packet for packet against
+[`lasp/space_packet_parser`](https://github.com/lasp/space_packet_parser), the Python
+implementation, over nine recorded mission streams. Where the two disagree, this crate is wrong
+until proven otherwise — and the handful of deliberate divergences are listed, with reasons, in
+the repository's `SUPPORTED.md`.
+
+Measured at roughly 100× that reference on decode.
+
+* **No panics.** Every failure is a `DecodeError`; a corrupt or hostile packet must not take
+  down a process sitting on a live downlink.
+* **No allocation for aligned reads.** Byte-aligned binary and string fields borrow straight
+  from the packet.
+* **Raw and engineering values both kept.** XTCE treats them as distinct and restriction
+  criteria may test either.
+
+Part of [RustSpaceLab/xtce-rs](https://github.com/RustSpaceLab/xtce-rs).

crates/xtce-model/Cargo.toml

@@ -1,6 +1,9 @@
 [package]
 name = "xtce-model"
 description = "XTCE telemetry metadata: streaming XML parser and arena-backed intermediate representation"
+readme = "README.md"
+keywords = ["xtce", "ccsds", "telemetry", "spacecraft", "parser"]
+categories = ["aerospace::space-protocols", "parser-implementations"]
 version.workspace = true
 edition.workspace = true
 rust-version.workspace = true

crates/xtce-model/README.md

@@ -0,0 +1,15 @@
+# xtce-model
+
+Reads an XTCE `SpaceSystem` document into `XtceDb`: a flat, index-addressed model that
+[`xtce-decode`](https://crates.io/crates/xtce-decode) walks to decode CCSDS packets, and that
+`xtce-codegen` compiles into static Rust decoders.
+
+Streaming XML through `quick-xml`, an arena behind every entity, and a `u32` newtype instead of
+a pointer — which keeps the model `Send + Sync`, makes cloning cheap, and turns following a
+reference into an array index.
+
+Only `TelemetryMetaData` is modelled. Constructs outside the decodable subset are still
+*represented*, so loading a real mission database never fails merely because part of it is out
+of scope; the error comes later, from the decoder, at the point a value actually depends on it.
+
+Part of [RustSpaceLab/xtce-rs](https://github.com/RustSpaceLab/xtce-rs).