docs: mark issue 795 plan complete

Record the completed acceptance criteria and validation matrix after the
implementation passed focused and all-features checks.

Author: DaleSeo

docs/plans/2026-07-27-issue-795-auth-error-classification.md

@@ -3,7 +3,7 @@
 **Date:** 2026-07-27
 **Issue:** [#795](https://github.com/modelcontextprotocol/rust-sdk/issues/795)
 **Goal:** Let clients detect that MCP initialization requires re-authorization without downcasting a transport-specific error or matching multiple internal variants. Preserve the existing error details and `WWW-Authenticate` challenge.
-**Status:** In progress
+**Status:** Complete
 
 ## Context
 
@@ -51,12 +51,12 @@ impl ClientInitializeError {
 
 | File | Role | Status |
 | --- | --- | --- |
-| `crates/rmcp/src/transport/streamable_http_client.rs` | Make the HTTP 401 detail error visible through the standard source chain | Modify |
-| `crates/rmcp/src/transport.rs` | Add transport-independent authorization-required classification | Modify |
-| `crates/rmcp/src/service/client.rs` | Add the initialization-error convenience predicate | Modify |
-| `crates/rmcp/tests/test_auth_error_classification.rs` | Exercise the public API and guard false positives | New |
-| `crates/rmcp/Cargo.toml` | Declare the feature-gated integration test | Modify |
-| `docs/OAUTH_SUPPORT.md` | Show callers how to branch back into authorization | Modify |
+| `crates/rmcp/src/transport/streamable_http_client.rs` | Make the HTTP 401 detail error visible through the standard source chain | Complete |
+| `crates/rmcp/src/transport.rs` | Add transport-independent authorization-required classification | Complete |
+| `crates/rmcp/src/service/client.rs` | Add the initialization-error convenience predicate | Complete |
+| `crates/rmcp/tests/test_auth_error_classification.rs` | Exercise the public API and guard false positives | Complete |
+| `crates/rmcp/Cargo.toml` | Declare the feature-gated integration test | Complete |
+| `docs/OAUTH_SUPPORT.md` | Show callers how to branch back into authorization | Complete |
 
 ## Tasks
 
@@ -100,7 +100,7 @@ impl ClientInitializeError {
 
 - [x] Callers do not need the transport type, backend error type, or a downcast.
 - [x] Direct and multiply wrapped matching errors are recognized.
-- [ ] Feature-disabled builds compile; feature-specific checks are guarded locally.
+- [x] Feature-disabled builds compile; feature-specific checks are guarded locally.
 - [x] Unknown custom transport errors return false.
 - [x] The method is documented as a classification predicate, not an authorization action.
 
@@ -114,7 +114,7 @@ impl ClientInitializeError {
 
 - [x] The issue's caller can replace its downcast helper with `error.is_authorization_required()`.
 - [x] JSON-RPC, protocol negotiation, connection-closed, and cancellation failures return false.
-- [ ] The method remains available consistently across client builds.
+- [x] The method remains available consistently across client builds.
 
 ### 5. Document the recovery pattern
 
@@ -150,13 +150,13 @@ Explain that the predicate covers both missing/expired local authorization and a
 
 **Acceptance criteria:**
 
-- [ ] `cargo test -p rmcp --test test_auth_error_classification --no-default-features --features "auth,client,transport-streamable-http-client"` passes.
-- [ ] `cargo check -p rmcp --no-default-features --features client` passes.
-- [ ] `cargo check -p rmcp --no-default-features --features "client,transport-streamable-http-client"` passes.
-- [ ] `cargo test -p rmcp --all-features` passes.
-- [ ] `cargo clippy -p rmcp --all-targets --all-features -- -D warnings` passes.
-- [ ] `cargo fmt --all --check` passes.
-- [ ] The public change is additive and does not require a SemVer exemption.
+- [x] `cargo test -p rmcp --test test_auth_error_classification --no-default-features --features "auth,client,transport-streamable-http-client"` passes.
+- [x] `cargo check -p rmcp --no-default-features --features client` passes.
+- [x] `cargo check -p rmcp --no-default-features --features "client,transport-streamable-http-client"` passes.
+- [x] `cargo test -p rmcp --all-features` passes.
+- [x] `cargo clippy -p rmcp --all-targets --all-features -- -D warnings` passes.
+- [x] `cargo fmt --all --check` passes.
+- [x] The public change is additive and does not require a SemVer exemption.
 
 ## Open Questions