chore(bip0032): update docs and agents.md (#128)

* chore(bip0032): update docs and agents.md

* update agents.md

Author: koushiro

bip0032/AGENTS.md

@@ -5,7 +5,7 @@
 - `src/lib.rs` is the crate entry and re-exports the public API.
 - `src/path/` defines derivation paths and child numbers.
 - `src/xkey/` contains extended key types and payload/version handling.
-- `src/curve/secp256k1/` holds backend-specific secp256k1 implementations (k256, secp256k1, libsecp256k1).
+- `src/curve/secp256k1/` holds backend-specific secp256k1 implementations (k256, secp256k1).
 - `src/curve/nist256p1/` holds the NIST P-256 (p256) backend implementation for SLIP-0010.
 - `src/curve/ed25519/` holds the ed25519 backend implementation for SLIP-0010.
 - `src/curve/slip10.rs` contains SLIP-0010 marker traits.
@@ -43,8 +43,8 @@
 ## Feature Flags & Backends
 
 - `std` enables standard library support; `k256` is the default secp256k1 backend.
-- Optional backends: `secp256k1` and `libsecp256k1` (note: libsecp256k1 is unmaintained).
-- SLIP-0010 features: `slip10` (core), `k256`|`secp256k1`|`libsecp256k1` (secp256k1), `p256` (nist256p1), `ed25519-dalek` (ed25519).
+- Optional backends: `k256` and `secp256k1`.
+- SLIP-0010 features: `slip10` (core), `k256`|`secp256k1` (secp256k1), `p256` (nist256p1), `ed25519-dalek` (ed25519).
 - When modifying backend code, validate the affected feature set with explicit `--features` flags.
 
 ## Commit & Pull Request Guidelines

bip0032/README.md

@@ -16,9 +16,9 @@ Another Rust implementation of [BIP-0032](https://github.com/bitcoin/bips/blob/m
 
 ## Support curves and features
 
-| Curve     | Feature                                 | Backends                      | Hardened | Non-hardened (private) | Non-hardened (public) | Serialization |
-| --------- | --------------------------------------- | ----------------------------- | -------- | ---------------------- | --------------------- | ------------- |
-| secp256k1 | `k256` \| `secp256k1` \| `libsecp256k1` | k256, secp256k1, libsecp256k1 | yes      | yes                    | yes                   | yes           |
+| Curve     | Feature               | Backends        | Hardened | Non-hardened (private) | Non-hardened (public) | Serialization |
+| --------- | --------------------- | --------------- | -------- | ---------------------- | --------------------- | ------------- |
+| secp256k1 | `k256` \| `secp256k1` | k256, secp256k1 | yes      | yes                    | yes                   | yes           |
 
 ## Usage
 
@@ -96,7 +96,6 @@ See documentation and examples at https://docs.rs/bip0032.
 - [x] Multiple secp256k1 backends
   - [`k256`](https://github.com/RustCrypto/elliptic-curves/tree/master/k256) (by default)
   - [`secp256k1`](https://github.com/rust-bitcoin/rust-secp256k1)
-  - [`libsecp256k1`](https://github.com/paritytech/libsecp256k1)
 - [x] Optional SLIP-0010 support
   - secp256k1 ([compatible with BIP32](https://github.com/satoshilabs/slips/blob/master/slip-0010.md#compatibility-with-bip-0032))
   - NIST P-256 (a.k.a. secp256r1, prime256v1) ([`p256`](https://github.com/RustCrypto/elliptic-curves/tree/master/p256))

bip0032/SLIP-0010.md

@@ -6,11 +6,11 @@ but the derivation rules and supported curves differ.
 
 ## Supported curves and features
 
-| Curve     | Feature                                              | Backends                      | Hardened | Non-hardened (private) | Non-hardened (public) | Serialization |
-| --------- | ---------------------------------------------------- | ----------------------------- | -------- | ---------------------- | --------------------- | ------------- |
-| secp256k1 | `slip10` + (`k256` \| `secp256k1` \| `libsecp256k1`) | k256, secp256k1, libsecp256k1 | yes      | yes                    | yes                   | no            |
-| nist256p1 | `slip10` + `p256`                                    | p256                          | yes      | yes                    | yes                   | no            |
-| ed25519   | `slip10` + `ed25519-dalek`                           | ed25519-dalek                 | yes      | no                     | no                    | no            |
+| Curve     | Feature                            | Backends        | Hardened | Non-hardened (private) | Non-hardened (public) | Serialization |
+| --------- | ---------------------------------- | --------------- | -------- | ---------------------- | --------------------- | ------------- |
+| secp256k1 | `slip10` + (`k256` \| `secp256k1`) | k256, secp256k1 | yes      | yes                    | yes                   | no            |
+| nist256p1 | `slip10` + `p256`                  | p256            | yes      | yes                    | yes                   | no            |
+| ed25519   | `slip10` + `ed25519-dalek`         | ed25519-dalek   | yes      | no                     | no                    | no            |
 
 Note: SLIP-0010 does not define a standardized extended key serialization.
 Only the BIP32 secp256k1 encoding (xpub/xprv) is supported for serialization.

bip0032/src/lib.rs

@@ -18,7 +18,7 @@
 //!
 //! | Curve | Feature | Backends | Hardened | Non-hardened (private) | Non-hardened (public) | Serialization |
 //! | --- | --- | --- | --- | --- | --- | --- |
-//! | secp256k1 | `k256` \| `secp256k1` \| `libsecp256k1` | k256, secp256k1, libsecp256k1 | yes | yes | yes | yes |
+//! | secp256k1 | `k256` \| `secp256k1` | k256, secp256k1 | yes | yes | yes | yes |
 //!
 //! ## Usage
 //!