Add cargo shell completion project summary

Author: Kobzol

posts/2024-11-01-gsoc-2024-results.md

@@ -67,7 +67,18 @@ Apart from the mentioned contributions, Eitaro also made a lot of other smaller
 - Mentor: [Ed Page](https://github.com/epage)
 - [Final report](https://hackmd.io/@PthRWaPvSmS_2Yu_GLbGpg/Hk-ficKpC)
 
-TODO
+Cargo's completion scripts have been hand maintained and frequently broken when changed. The goal for this effort was to have the completions automatically generated from the definition of Cargo's command-line, with extension points for dynamically generated results.
+
+[shanmu](https://github.com/shannmu) took the prototype for dynamic completions in [clap][clap] (the command-line parser used by Cargo), got it working and tested for common shells, as well as extended the parser to cover more cases. They then added extension points for CLI's to provide custom completion results that can be generated on the fly.
+
+In the next phase, shanmu added this to nightly Cargo and added different custom completers to match what the handwritten completions do. As an example, with this feature enabled, when you type `cargo test --test=` and hit the Tab key, your shell will autocomplete all the test targets in your current Rust crate! If you are interested, see the [instructions][cargo-shell-completion] for trying this out! The link also lists where you can provide feedback.
+
+You can also check out the following issues to find out what is left before this can be stabilized:
+- [clap#3166](https://github.com/clap-rs/clap/issues/3166)
+- [cargo#14520](https://github.com/rust-lang/cargo/issues/14520)
+
+[clap]: https://github.com/clap-rs/clap
+[cargo-shell-completion]: https://doc.rust-lang.org/nightly/cargo/reference/unstable.html#native-completions
 
 ### Rewriting Esoteric, Error-Prone Makefile Tests Using Robust Rust Features