Bumps the all-dependencies group in
/integration-test/src/jvmTest/typescript with 1 update:
[tsx](https://github.com/privatenumber/tsx).
Updates `tsx` from 4.23.11 to 4.23.12
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/privatenumber/tsx/releases">tsx's
releases</a>.</em></p>
<blockquote>
<h2>v4.23.12</h2>
<h2><a
href="https://github.com/privatenumber/tsx/compare/v4.23.11...v4.23.12">4.23.12</a>
(2026-08-10)</h2>
<h3>Bug Fixes</h3>
<ul>
<li>shim <code>import.meta</code> when tokens are split by comments or
newlines (<a
href="https://redirect.github.com/privatenumber/tsx/issues/829">#829</a>)
(<a
href="ed9d33046a">ed9d330</a>),
closes <a
href="https://redirect.github.com/privatenumber/tsx/issues/828">#828</a></li>
</ul>
<hr />
<p>This release is also available on:</p>
<ul>
<li><a href="https://www.npmjs.com/package/tsx/v/4.23.12"><code>npm
package (@latest dist-tag)</code></a></li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="ed9d33046a"><code>ed9d330</code></a>
fix: shim <code>import.meta</code> when tokens are split by comments or
newlines (<a
href="https://redirect.github.com/privatenumber/tsx/issues/829">#829</a>)</li>
<li><a
href="651f5bec70"><code>651f5be</code></a>
test: cover CommonJS TypeScript import.meta paths</li>
<li>See full diff in <a
href="https://github.com/privatenumber/tsx/compare/v4.23.11...v4.23.12">compare
view</a></li>
</ul>
</details>
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Bumps the all-dependencies group with 2 updates in the
/integration-test/src/jvmTest/typescript directory:
[@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node)
and [tsx](https://github.com/privatenumber/tsx).
Updates `@types/node` from 26.1.2 to 26.2.0
<details>
<summary>Commits</summary>
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<li>See full diff in <a
href="https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/node">compare
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</details>
<br />
Updates `tsx` from 4.23.4 to 4.23.11
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/privatenumber/tsx/releases">tsx's
releases</a>.</em></p>
<blockquote>
<h2>v4.23.11</h2>
<h2><a
href="https://github.com/privatenumber/tsx/compare/v4.23.10...v4.23.11">4.23.11</a>
(2026-08-07)</h2>
<h3>Bug Fixes</h3>
<ul>
<li>preserve async ESM require fallback (<a
href="55cbecef8e">55cbece</a>)</li>
</ul>
<hr />
<p>This release is also available on:</p>
<ul>
<li><a href="https://www.npmjs.com/package/tsx/v/4.23.11"><code>npm
package (@latest dist-tag)</code></a></li>
</ul>
<h2>v4.23.10</h2>
<h2><a
href="https://github.com/privatenumber/tsx/compare/v4.23.9...v4.23.10">4.23.10</a>
(2026-08-07)</h2>
<h3>Bug Fixes</h3>
<ul>
<li>support nyc coverage discovery (<a
href="https://redirect.github.com/privatenumber/tsx/issues/710">#710</a>)
(<a
href="ec1bcd5f71">ec1bcd5</a>)</li>
</ul>
<hr />
<p>This release is also available on:</p>
<ul>
<li><a href="https://www.npmjs.com/package/tsx/v/4.23.10"><code>npm
package (@latest dist-tag)</code></a></li>
</ul>
<h2>v4.23.9</h2>
<h2><a
href="https://github.com/privatenumber/tsx/compare/v4.23.8...v4.23.9">4.23.9</a>
(2026-08-06)</h2>
<h3>Bug Fixes</h3>
<ul>
<li>map Node test locations (<a
href="2f55884195">2f55884</a>)</li>
<li>support data URLs in tsImport (<a
href="b94f46f6b6">b94f46f</a>)</li>
</ul>
<hr />
<p>This release is also available on:</p>
<ul>
<li><a href="https://www.npmjs.com/package/tsx/v/4.23.9"><code>npm
package (@latest dist-tag)</code></a></li>
</ul>
<h2>v4.23.8</h2>
<h2><a
href="https://github.com/privatenumber/tsx/compare/v4.23.7...v4.23.8">4.23.8</a>
(2026-08-05)</h2>
<h3>Bug Fixes</h3>
<ul>
<li>preserve package subpath resolution (<a
href="be1315e3f3">be1315e</a>)</li>
<li>preserve typeless ESM dependency exports (<a
href="70dfc5e3db">70dfc5e</a>)</li>
</ul>
<hr />
<p>This release is also available on:</p>
<ul>
<li><a href="https://www.npmjs.com/package/tsx/v/4.23.8"><code>npm
package (@latest dist-tag)</code></a></li>
</ul>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="bd3bc6448e"><code>bd3bc64</code></a>
test: cover CommonJS loader source fallback</li>
<li><a
href="55cbecef8e"><code>55cbece</code></a>
fix: preserve async ESM require fallback</li>
<li><a
href="6c5ba85f7a"><code>6c5ba85</code></a>
docs: document CommonJS default interop</li>
<li><a
href="ec1bcd5f71"><code>ec1bcd5</code></a>
fix: support nyc coverage discovery (<a
href="https://redirect.github.com/privatenumber/tsx/issues/710">#710</a>)</li>
<li><a
href="b6e5b48a7b"><code>b6e5b48</code></a>
docs: clarify CommonJS default imports</li>
<li><a
href="2f55884195"><code>2f55884</code></a>
fix: map Node test locations</li>
<li><a
href="de935d588b"><code>de935d5</code></a>
docs: document Node source-map stack formatting</li>
<li><a
href="b94f46f6b6"><code>b94f46f</code></a>
fix: support data URLs in tsImport</li>
<li><a
href="be1315e3f3"><code>be1315e</code></a>
fix: preserve package subpath resolution</li>
<li><a
href="5efba41e14"><code>5efba41</code></a>
docs: organize transform backend research</li>
<li>Additional commits viewable in <a
href="https://github.com/privatenumber/tsx/compare/v4.23.4...v4.23.11">compare
view</a></li>
</ul>
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Bumps [hono](https://github.com/honojs/hono) from 4.12.27 to 4.13.1.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/honojs/hono/releases">hono's
releases</a>.</em></p>
<blockquote>
<h2>v4.13.1</h2>
<h2>What's Changed</h2>
<ul>
<li>fix(trie-router): count every slash a pattern consumes by <a
href="https://github.com/Jaybhade"><code>@Jaybhade</code></a> in <a
href="https://redirect.github.com/honojs/hono/pull/5189">honojs/hono#5189</a></li>
<li>fix(utils/stream): re-acquire writer lock when pipe() throws by <a
href="https://github.com/Sriharsha-dev369"><code>@Sriharsha-dev369</code></a>
in <a
href="https://redirect.github.com/honojs/hono/pull/4988">honojs/hono#4988</a></li>
<li>fix(etag): skip unsafe methods or error responses on non-* case by
<a
href="https://github.com/na-trium-144"><code>@na-trium-144</code></a>
in <a
href="https://redirect.github.com/honojs/hono/pull/5196">honojs/hono#5196</a></li>
</ul>
<h2>New Contributors</h2>
<ul>
<li><a href="https://github.com/Jaybhade"><code>@Jaybhade</code></a>
made their first contribution in <a
href="https://redirect.github.com/honojs/hono/pull/5189">honojs/hono#5189</a></li>
<li><a
href="https://github.com/Sriharsha-dev369"><code>@Sriharsha-dev369</code></a>
made their first contribution in <a
href="https://redirect.github.com/honojs/hono/pull/4988">honojs/hono#4988</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/honojs/hono/compare/v4.13.0...v4.13.1">https://github.com/honojs/hono/compare/v4.13.0...v4.13.1</a></p>
<h2>v4.13.0</h2>
<p>Hono v4.13.0 is now available!</p>
<p>The highlight of this release is performance: a batch of low-level
optimizations makes the core request/response path significantly faster
— up to 1.25x on common routes in our benchmark. This release also adds
first-class support for the HTTP QUERY method, defined in <a
href="https://www.rfc-editor.org/rfc/rfc10008.html">RFC 10008</a>, a new
Method Not Allowed middleware, and more.</p>
<h2>Performance improvements</h2>
<p>This release includes a series of small optimizations: skipping
unnecessary <code>Headers</code> allocations, replacing regex tests with
<code>indexOf</code>, allocating internal state lazily, and more.</p>
<p>Here is <a
href="https://github.com/honojs/hono/tree/main/benchmarks/fetch"><code>benchmarks/fetch</code></a>
comparing v4.12 and v4.13 (<code>ROUNDS=5 ./compare.sh</code>, Bun
1.4.0, Apple Silicon — each measurement runs in a fresh process, and the
variant order is reversed every round to avoid warm-up bias):</p>
<table>
<thead>
<tr>
<th>Benchmark</th>
<th align="right">v4.12</th>
<th align="right">v4.13</th>
<th align="right">Speedup</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>ping</code> — <code>GET /</code></td>
<td align="right">165.83 ns</td>
<td align="right">163.99 ns</td>
<td align="right">1.01x</td>
</tr>
<tr>
<td><code>query</code> — <code>GET /id/1?name=bun</code></td>
<td align="right">674.40 ns</td>
<td align="right">616.99 ns</td>
<td align="right"><strong>1.09x</strong></td>
</tr>
<tr>
<td><code>json</code> — <code>GET /user</code></td>
<td align="right">528.99 ns</td>
<td align="right">422.44 ns</td>
<td align="right"><strong>1.25x</strong></td>
</tr>
<tr>
<td><code>body</code> — <code>POST /json</code></td>
<td align="right">1.16 µs</td>
<td align="right">1.00 µs</td>
<td align="right"><strong>1.15x</strong></td>
</tr>
</tbody>
</table>
<p>The individual changes:</p>
<ul>
<li>perf(context): iterate the header record with <code>for..in</code>
<a
href="https://redirect.github.com/honojs/hono/pull/5118">honojs/hono#5118</a></li>
<li>perf(url): replace regex tests with <code>indexOf</code> <a
href="https://redirect.github.com/honojs/hono/pull/5121">honojs/hono#5121</a></li>
<li>perf(context): skip <code>Headers</code> creation when there are no
headers to merge <a
href="https://redirect.github.com/honojs/hono/pull/5122">honojs/hono#5122</a></li>
<li>perf(urls): refactor <code>tryDecodeURIComponent</code> <a
href="https://redirect.github.com/honojs/hono/pull/5158">honojs/hono#5158</a></li>
<li>perf(request): allocate <code>#validatedData</code> lazily <a
href="https://redirect.github.com/honojs/hono/pull/5175">honojs/hono#5175</a></li>
<li>perf(request): probe the body cache without allocating <a
href="https://redirect.github.com/honojs/hono/pull/5176">honojs/hono#5176</a></li>
</ul>
<p>In addition, the RegExpRouter rewrite described below makes route
registration plus the first match roughly 20% faster.</p>
<p>Thanks <a
href="https://github.com/kibertoad"><code>@kibertoad</code></a> for the
contributions!</p>
<h2>First-class QUERY method support</h2>
<p>The QUERY method — a safe, idempotent method that carries a request
body — is now a first-class citizen in Hono. You can define QUERY
handlers with <code>app.query()</code>:</p>
<pre lang="ts"><code>const app = new Hono()
<p></tr></table><br />
</code></pre></p>
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="cf785287b5"><code>cf78528</code></a>
4.13.1</li>
<li><a
href="f6aa913c3f"><code>f6aa913</code></a>
fix(etag): skip unsafe methods or error responses on non-* case (<a
href="https://redirect.github.com/honojs/hono/issues/5196">#5196</a>)</li>
<li><a
href="cd31bc196e"><code>cd31bc1</code></a>
fix(utils/stream): re-acquire writer lock when pipe() throws (<a
href="https://redirect.github.com/honojs/hono/issues/4988">#4988</a>)</li>
<li><a
href="569b4191a2"><code>569b419</code></a>
fix(trie-router): count every slash a pattern consumes (<a
href="https://redirect.github.com/honojs/hono/issues/5189">#5189</a>)</li>
<li><a
href="192768fbaf"><code>192768f</code></a>
4.13.0</li>
<li><a
href="b0c2d90eb0"><code>b0c2d90</code></a>
Merge pull request <a
href="https://redirect.github.com/honojs/hono/issues/5154">#5154</a>
from honojs/next</li>
<li><a
href="8f07028270"><code>8f07028</code></a>
fix(compress): set Vary: Accept-Encoding on negotiated responses (<a
href="https://redirect.github.com/honojs/hono/issues/5137">#5137</a>)</li>
<li><a
href="8a0b18fd9b"><code>8a0b18f</code></a>
feat(reg-exp-router): throw UnsupportedPathError during route
registration (#...</li>
<li><a
href="3feb3551d4"><code>3feb355</code></a>
fix(jsx): allow a function component to return an array (<a
href="https://redirect.github.com/honojs/hono/issues/5179">#5179</a>)</li>
<li><a
href="5d911d2ab7"><code>5d911d2</code></a>
feat(utils/headers): add HTTP fields newly registered with IANA (<a
href="https://redirect.github.com/honojs/hono/issues/5153">#5153</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/honojs/hono/compare/v4.12.27...v4.13.1">compare
view</a></li>
</ul>
</details>
<br />
Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
## Summary
Adds optional SSE heartbeat configuration for streamable HTTP MCP server
connections.
This lets `Application.mcpStreamableHttp` callers pass Ktor's
`Heartbeat` configuration for SSE streams, including heartbeat period
and event payload. Heartbeats remain disabled by default, preserving the
existing stream behavior unless the new option is explicitly provided.
## Motivation and Context
Some MCP clients need heartbeat messages on SSE connections to keep the
connection alive. Without those heartbeats, the client may proactively
disconnect from the MCP server. MCP server developers need a way to
configure an SSE heartbeat mechanism so they can avoid unexpected client
disconnects.
In my case, my MCP server was consistently disconnected by Gemini CLI. I
worked around the issue with some fallback approaches, but I believe the
best implementation is to add heartbeat support by using Ktor's built-in
API.
## Implementation Notes
- Added a function overload of `Application.mcpStreamableHttp` to
introduce heartbeat parameter `sseHeartbeatConfig: (Heartbeat.() ->
Unit)?`.
- Applied the configuration inside the Ktor `sse { ... }` block before
handling the existing streamable HTTP transport request.
- Updated the server API dump for the new public API surface.
## How Has This Been Tested?
Added `StreamableHttpHeartbeatIntegrationTest` covering:
- Configured GET SSE streams apply the provided heartbeat configuration.
- GET SSE streams do not send default heartbeats when
`sseHeartbeatConfig` is omitted.
- Configured GET SSE streams emit heartbeat events repeatedly.
- Legacy MCP over SSE APIs do not expose the new heartbeat
configuration.
Verified locally with:
```bash
./gradlew :integration-test:jvmTest --tests "io.modelcontextprotocol.kotlin.sdk.integration.streamablehttp.StreamableHttpHeartbeatIntegrationTest"
```
Result: `BUILD SUCCESSFUL`.
## Breaking Changes
None.
This change adds a new `Application.mcpStreamableHttp` overload that
accepts
`sseHeartbeatConfig: (Heartbeat.() -> Unit)?` while keeping the existing
overload
unchanged. Existing callers continue to compile and keep the previous
behavior:
SSE heartbeats are not sent unless the new overload is used with an
explicit
heartbeat configuration.
## Types of changes
- [ ] Bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update
## Checklist
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [x] I have added appropriate error handling
- [x] I have added or updated documentation as needed
## Additional context
Heartbeat behavior is delegated to Ktor's SSE heartbeat support, so
applications can use the same configuration semantics they would use in
native Ktor SSE routes.
Related issue: [SSE needs a heartbeat #344
](https://github.com/modelcontextprotocol/kotlin-sdk/issues/344)
---------
Co-authored-by: Pavel Gorgulov <devcrocod@gmail.com>
Reject duplicate feature registration instead of silently overwriting
the existing entry.
## Motivation and Context
`FeatureRegistry.add`/`addAll` silently replaced a feature registered
under the same key and emitted a spurious `list_changed` notification.
Tool/prompt names and resource URIs are unique identifiers in MCP, and
the TypeScript SDK already rejects duplicates at registration time
(`Tool X is already registered`).
- `addTool`/`addPrompt`/`addResource`/`addResourceTemplate` now throw
`IllegalArgumentException` on a duplicate name/URI; the existing
registration stays intact and no notification is emitted.
- `addTools`/`addPrompts`/`addResources` are all-or-nothing: batches
with intra-batch duplicates or conflicts with existing keys are rejected
without registering anything.
- To replace a feature, remove it first (`removeTool` + `addTool`),
matching the TypeScript SDK's remove-then-re-register path. No new
public API.
## How Has This Been Tested?
New `FeatureRegistryTest` unit suite (duplicate rejection, batch
atomicity, no notification on rejection, re-add after remove) plus
integration tests for tools, prompts, resources, and resource templates.
The check also surfaced a real duplicate `addResource` in
`AbstractResourceIntegrationTest`, fixed here. `jvmTest` (all modules),
`apiCheck`, `ktlintCheck`, and `detekt` pass locally.
## Breaking Changes
No public API signature changes (`apiCheck` passes against the existing
dump). Behavioral: registering a duplicate name/URI now throws
`IllegalArgumentException` instead of silently overwriting; remove the
feature first to replace it.
## Types of changes
- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [x] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update
## Checklist
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [x] I have added appropriate error handling
- [x] I have added or updated documentation as needed
Validate accepted form-mode elicitation `content` against the
`requestedSchema` on the server, rejecting mismatches with an
`INVALID_PARAMS` error.
fixes#895
<!-- Provide a brief summary of your changes -->
## Motivation and Context
<!-- Why is this change needed? What problem does it solve? -->
`createElicitation` returned accepted content to server code as-is. The
specification's
form-mode security guidance says "Servers SHOULD validate received data
matches the requested
schema" ([2025-11-25, Form Mode
Security](https://modelcontextprotocol.io/specification/2025-11-25/client/elicitation#form-mode-security)).
Comparable validation already exists in the TypeScript SDK's
`elicitInput` and Python's `elicit_with_validation` helper. Details and
design notes are in #895.
## How Has This Been Tested?
<!-- Have you tested this in a real application? Which scenarios were
tested? -->
New unit tests for the validator and integration tests over an in-memory
client–server pair.
## Breaking Changes
<!-- Will users need to update their code or configurations? -->
No API changes. Behavioral note: an accepted form-mode response that
does not match the requested schema now fails `createElicitation` with
`McpException` (`INVALID_PARAMS`) instead of being returned to the
caller.
## Types of changes
<!-- What types of changes does your code introduce? Put an `x` in all
the boxes that apply: -->
- [ ] Bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update
## Checklist
<!-- Go over all the following points, and put an `x` in all the boxes
that apply. -->
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [x] I have added appropriate error handling
- [x] I have added or updated documentation as needed
Co-authored-by: Pavel Gorgulov <devcrocod@gmail.com>
Make inbound message handling concurrent after the initialization
handshake, so a slow or peer-awaiting handler no longer blocks other
messages on the same connection
fixes#176, #572
## Motivation and Context
Inbound messages were processed serially on the transport read loop. One
slow or peer-awaiting request handler (sampling, elicitation, roots)
blocked every later message on that connection, including the responses
and `notifications/cancelled` those handlers depend on which could
deadlock request/response flows.
## How Has This Been Tested?
New and old tests
## Breaking Changes
- after the handshake, inbound handlers may run concurrently (processing
stays serial during initialization). There is no opt-out flag by design,
concurrency is bounded by `maxConcurrentHandlers` /
`maxInFlightHandlers`.
- `ProtocolOptions` / `ClientOptions` / `ServerOptions` gain new
parameters with defaults
- `RequestHandlerExtra` is now a coroutine-context element and is no
longer user-constructible
## Types of changes
- [x] Bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [x] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update
## Checklist
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [x] I have added appropriate error handling
- [x] I have added or updated documentation as needed
`ChannelTransportTest` connected both sides concurrently, which is racy.
`ChannelTransport` starts delivering inbound messages when its read loop
launches, which happens before `start()` marks the transport
`Operational`. The two run on different dispatchers, so the client's
`initialize` could reach the server read loop first and the session's
`InitializeResult` was then rejected by the send state gate with
`Transport is not ready`. Measured ~3 failures in 600 rounds.
`createSession()` does not await the handshake, so creating the session
first is enough to order the two. This also matches the usage shown in
`createLinkedPair()`'s KDoc.
Not addressed here: the transport itself should not deliver inbound
messages before it is `Operational`. Fixing that needs a
post-`Operational` hook on `AbstractClientTransport` that the read loop
awaits.
## Summary
Fixes `StdioClientTransport.close()` so shutdown does not hang when the
stdin read loop is blocked waiting for input.
## Root Cause / Context
`StdioClientTransport.closeResources()` stopped the transport coroutine
scope and then waited for the scope job to finish. On the JVM, a
`Source.readAtMostTo()` call backed by a blocking Java stream does not
necessarily return when the coroutine is cancelled. If the read loop
stayed blocked, `close()` could wait indefinitely.
## Changes
- Close the stdin source during stdio client shutdown before waiting for
transport coroutines to finish.
- Also close the optional stderr source during shutdown.
- Keep source-close failures non-fatal and log them at debug level.
- Add a JVM regression test with a `RawSource` that blocks in
`readAtMostTo()` until `close()` is called.
- Assert the close path completes, emits `onClose`, and does not invoke
`onError`.
## Scope / Risk
This is limited to `StdioClientTransport` shutdown behavior. It does not
change the public API or server transports. The regression coverage is
JVM-focused because the reported hang is caused by a blocking Java
stream read.
## Verification
```bash
./gradlew :integration-test:jvmTest --tests 'io.modelcontextprotocol.kotlin.sdk.client.StdioClientTransportTest'
./gradlew :kotlin-sdk-client:jvmTest
./gradlew :kotlin-sdk-client:ktlintCheck :integration-test:ktlintCheck :kotlin-sdk-client:detekt :integration-test:detekt :kotlin-sdk-client:apiCheck
```
Closes#514
Bumps [hono](https://github.com/honojs/hono) from 4.12.23 to 4.12.27.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/honojs/hono/releases">hono's
releases</a>.</em></p>
<blockquote>
<h2>v4.12.27</h2>
<h2>Security fixes</h2>
<p>This release includes fixes for the following security issues:</p>
<h3>hono/jsx does not isolate context per request</h3>
<p>Affects: <code>hono/jsx</code>, <code>hono/jsx-renderer</code>.
During SSR, context was stored process-wide instead of per request, so
<code>useContext()</code>/<code>useRequestContext()</code> read after an
<code>await</code> in an async component could return another concurrent
request's value — leading to cross-request data disclosure or
authorization checks against the wrong request. GHSA-hvrm-45r6-mjfj</p>
<h3>Server-Side XSS via JSX escaping bypass in cx()</h3>
<p>Affects: <code>hono/css</code>. <code>cx()</code> marked its composed
class name as already-escaped without escaping the input, so untrusted
input passed as a class name could break out of the JSX
<code>class</code> attribute during SSR and inject markup (XSS).
GHSA-w62v-xxxg-mg59</p>
<h3>API Gateway v1 adapter can drop a repeated request header value</h3>
<p>Affects: <code>hono/aws-lambda</code>. The API Gateway v1 (and VPC
Lattice) adapter de-duplicated repeated header values by substring
instead of exact match, dropping a value that is a substring of another
(e.g. <code>203.0.113.1</code> dropped when <code>203.0.113.10</code> is
present) — affecting logic such as <code>X-Forwarded-For</code>-based IP
restriction. GHSA-xgm2-5f3f-mvvc</p>
<hr />
<p>Users of <code>hono/jsx</code>/<code>hono/jsx-renderer</code>,
<code>hono/css</code> (<code>cx()</code>), or the
<code>hono/aws-lambda</code> API Gateway v1 / VPC Lattice adapters are
encouraged to upgrade.</p>
<h2>v4.12.26</h2>
<h2>What's Changed</h2>
<ul>
<li>fix(lambda-edge): satisfy Deno lib types for Content-Length body
encoding by <a
href="https://github.com/yusukebe"><code>@yusukebe</code></a> in <a
href="https://redirect.github.com/honojs/hono/pull/5013">honojs/hono#5013</a></li>
<li>ci: publish to npm from CI with OIDC trusted publishing by <a
href="https://github.com/yusukebe"><code>@yusukebe</code></a> in <a
href="https://redirect.github.com/honojs/hono/pull/5028">honojs/hono#5028</a></li>
<li>chore: remove unused devcontainer and gitpod configs by <a
href="https://github.com/yusukebe"><code>@yusukebe</code></a> in <a
href="https://redirect.github.com/honojs/hono/pull/5029">honojs/hono#5029</a></li>
<li>chore: replace arg and glob with Bun native APIs in build script by
<a href="https://github.com/yusukebe"><code>@yusukebe</code></a> in <a
href="https://redirect.github.com/honojs/hono/pull/5030">honojs/hono#5030</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/honojs/hono/compare/v4.12.25...v4.12.26">https://github.com/honojs/hono/compare/v4.12.25...v4.12.26</a></p>
<h2>v4.12.25</h2>
<h2>Security fixes</h2>
<p>This release includes fixes for the following security issues:</p>
<h3>CORS Middleware reflects any Origin with credentials when
<code>origin</code> defaults to the wildcard</h3>
<p>Affects: <code>hono/cors</code>. Fixes the wildcard origin reflecting
the request <code>Origin</code> and sending
<code>Access-Control-Allow-Credentials: true</code> when
<code>credentials: true</code> is set without an explicit
<code>origin</code>, where any site a logged-in user visited could make
credentialed cross-origin requests and read responses from
cookie-authenticated endpoints. GHSA-88fw-hqm2-52qc</p>
<h3>Body Limit Middleware can be bypassed on AWS Lambda by understating
<code>Content-Length</code></h3>
<p>Affects: <code>hono/body-limit</code> on AWS Lambda
(<code>hono/aws-lambda</code>, <code>hono/lambda-edge</code>). Fixes the
request being built with the client-declared <code>Content-Length</code>
while the body is delivered fully buffered, where a client could declare
a small <code>Content-Length</code> with a much larger body and slip
past the configured size limit. GHSA-rv63-4mwf-qqc2</p>
<h3>Path traversal in <code>serve-static</code> on Windows via encoded
backslash (<code>%5C</code>)</h3>
<p>Affects: <code>serveStatic</code> on Windows (Node, Bun, Deno
adapters). Fixes the path guard allowing a lone backslash, where an
encoded backslash (<code>%5C</code>) decoded to <code>\</code> was
treated as a separator by the Windows path resolver, letting a single
URL segment escape into a middleware-guarded subtree.
GHSA-wwfh-h76j-fc44</p>
<h3>AWS Lambda adapter merges multiple <code>Set-Cookie</code> headers
into one value, dropping cookies on ALB single-header and Lattice</h3>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="97c6fe1f12"><code>97c6fe1</code></a>
4.12.27</li>
<li><a
href="aa921770d0"><code>aa92177</code></a>
Merge commit from fork</li>
<li><a
href="cd3f6f7194"><code>cd3f6f7</code></a>
Merge commit from fork</li>
<li><a
href="d4853a8f27"><code>d4853a8</code></a>
fix(jsx): make merged context-isolation tests pass tsc type check (<a
href="https://redirect.github.com/honojs/hono/issues/5037">#5037</a>)</li>
<li><a
href="6735fea78d"><code>6735fea</code></a>
fix(jsx): cast awaitedFallback through unknown to fix Deno type check
(<a
href="https://redirect.github.com/honojs/hono/issues/5036">#5036</a>)</li>
<li><a
href="fab3b13639"><code>fab3b13</code></a>
Merge commit from fork</li>
<li><a
href="9f0dadf141"><code>9f0dadf</code></a>
ci: use npm Staged publishing (<a
href="https://redirect.github.com/honojs/hono/issues/5035">#5035</a>)</li>
<li><a
href="27b7992f82"><code>27b7992</code></a>
4.12.26</li>
<li><a
href="d29982cc40"><code>d29982c</code></a>
chore: replace arg and glob with Bun native APIs in build script</li>
<li><a
href="16215d5f50"><code>16215d5</code></a>
chore: remove unused devcontainer and gitpod configs (<a
href="https://redirect.github.com/honojs/hono/issues/5029">#5029</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/honojs/hono/compare/v4.12.23...v4.12.27">compare
view</a></li>
</ul>
</details>
<details>
<summary>Maintainer changes</summary>
<p>This version was pushed to npm by <a
href="https://www.npmjs.com/~GitHub%20Actions">GitHub Actions</a>, a new
releaser for hono since your current version.</p>
</details>
<br />
Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
closes#410
## How Has This Been Tested?
integration and unit tests
## Breaking Changes
none
## Types of changes
- [ ] Bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update
## Checklist
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [x] I have added appropriate error handling
- [x] I have added or updated documentation as needed
Bumps [esbuild](https://github.com/evanw/esbuild) from 0.28.0 to 0.28.1.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/evanw/esbuild/releases">esbuild's
releases</a>.</em></p>
<blockquote>
<h2>v0.28.1</h2>
<ul>
<li>
<p>Disallow <code>\</code> in local development server HTTP requests (<a
href="https://github.com/evanw/esbuild/security/advisories/GHSA-g7r4-m6w7-qqqr">GHSA-g7r4-m6w7-qqqr</a>)</p>
<p>This release fixes a security issue where HTTP requests to esbuild's
local development server could traverse outside of the serve directory
on Windows using a <code>\</code> backslash character. It happened due
to the use of Go's <code>path.Clean()</code> function, which only
handles Unix-style <code>/</code> characters. HTTP requests with paths
containing <code>\</code> are no longer allowed.</p>
<p>Thanks to <a
href="https://github.com/dellalibera"><code>@dellalibera</code></a> for
reporting this issue.</p>
</li>
<li>
<p>Add integrity checks to the Deno API (<a
href="https://github.com/evanw/esbuild/security/advisories/GHSA-gv7w-rqvm-qjhr">GHSA-gv7w-rqvm-qjhr</a>)</p>
<p>The previous release of esbuild added integrity checks to esbuild's
npm install script. This release also adds integrity checks to esbuild's
Deno install script. Now esbuild's Deno API will also fail with an error
if the downloaded esbuild binary contains something other than the
expected content.</p>
<p>Note that esbuild's Deno API installs from
<code>registry.npmjs.org</code> by default, but allows the
<code>NPM_CONFIG_REGISTRY</code> environment variable to override this
with a custom package registry. This change means that the esbuild
executable served by <code>NPM_CONFIG_REGISTRY</code> must now match the
expected content.</p>
<p>Thanks to <a
href="https://github.com/sondt99"><code>@sondt99</code></a> for
reporting this issue.</p>
</li>
<li>
<p>Avoid inlining <code>using</code> and <code>await using</code>
declarations (<a
href="https://redirect.github.com/evanw/esbuild/issues/4482">#4482</a>)</p>
<p>Previously esbuild's minifier sometimes incorrectly inlined
<code>using</code> and <code>await using</code> declarations into
subsequent uses of that declaration, which then fails to dispose of the
resource correctly. This bug happened because inlining was done for
<code>let</code> and <code>const</code> declarations by avoiding doing
it for <code>var</code> declarations, which no longer worked when more
declaration types were added. Here's an example:</p>
<pre lang="js"><code>// Original code
{
using x = new Resource()
x.activate()
}
<p>// Old output (with --minify)<br />
new Resource().activate();</p>
<p>// New output (with --minify)<br />
{using e=new Resource;e.activate()}<br />
</code></pre></p>
</li>
<li>
<p>Fix module evaluation when an error is thrown (<a
href="https://redirect.github.com/evanw/esbuild/issues/4461">#4461</a>,
<a
href="https://redirect.github.com/evanw/esbuild/pull/4467">#4467</a>)</p>
<p>If an error is thrown during module evaluation, esbuild previously
didn't preserve the state of the module for subsequent module
references. This was observable if <code>import()</code> or
<code>require()</code> is used to import a module multiple times. The
thrown error is supposed to be thrown by every call to
<code>import()</code> or <code>require()</code>, not just the first.
With this release, esbuild will now throw the same error every time you
call <code>import()</code> or <code>require()</code> on a module that
throws during its evaluation.</p>
</li>
<li>
<p>Fix some edge cases around the <code>new</code> operator (<a
href="https://redirect.github.com/evanw/esbuild/issues/4477">#4477</a>)</p>
<p>Previously esbuild incorrectly printed certain edge cases involving
complex expressions inside the target of a <code>new</code> expression
(specifically an optional chain and/or a tagged template literal). The
generated code for the <code>new</code> target was not correctly wrapped
with parentheses, and either contained a syntax error or had different
semantics. These edge cases have been fixed so that they now correctly
wrap the <code>new</code> target in parentheses. Here is an example of
some affected code:</p>
<pre lang="js"><code>// Original code
new (foo()`bar`)()
new (foo()?.bar)()
<p>// Old output<br />
new foo()<code>bar</code>();<br />
new (foo())?.bar();</p>
<p></code></pre></p>
</li>
</ul>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/evanw/esbuild/blob/main/CHANGELOG.md">esbuild's
changelog</a>.</em></p>
<blockquote>
<h2>0.28.1</h2>
<ul>
<li>
<p>Disallow <code>\</code> in local development server HTTP requests (<a
href="https://github.com/evanw/esbuild/security/advisories/GHSA-g7r4-m6w7-qqqr">GHSA-g7r4-m6w7-qqqr</a>)</p>
<p>This release fixes a security issue where HTTP requests to esbuild's
local development server could traverse outside of the serve directory
on Windows using a <code>\</code> backslash character. It happened due
to the use of Go's <code>path.Clean()</code> function, which only
handles Unix-style <code>/</code> characters. HTTP requests with paths
containing <code>\</code> are no longer allowed.</p>
<p>Thanks to <a
href="https://github.com/dellalibera"><code>@dellalibera</code></a> for
reporting this issue.</p>
</li>
<li>
<p>Add integrity checks to the Deno API (<a
href="https://github.com/evanw/esbuild/security/advisories/GHSA-gv7w-rqvm-qjhr">GHSA-gv7w-rqvm-qjhr</a>)</p>
<p>The previous release of esbuild added integrity checks to esbuild's
npm install script. This release also adds integrity checks to esbuild's
Deno install script. Now esbuild's Deno API will also fail with an error
if the downloaded esbuild binary contains something other than the
expected content.</p>
<p>Note that esbuild's Deno API installs from
<code>registry.npmjs.org</code> by default, but allows the
<code>NPM_CONFIG_REGISTRY</code> environment variable to override this
with a custom package registry. This change means that the esbuild
executable served by <code>NPM_CONFIG_REGISTRY</code> must now match the
expected content.</p>
<p>Thanks to <a
href="https://github.com/sondt99"><code>@sondt99</code></a> for
reporting this issue.</p>
</li>
<li>
<p>Avoid inlining <code>using</code> and <code>await using</code>
declarations (<a
href="https://redirect.github.com/evanw/esbuild/issues/4482">#4482</a>)</p>
<p>Previously esbuild's minifier sometimes incorrectly inlined
<code>using</code> and <code>await using</code> declarations into
subsequent uses of that declaration, which then fails to dispose of the
resource correctly. This bug happened because inlining was done for
<code>let</code> and <code>const</code> declarations by avoiding doing
it for <code>var</code> declarations, which no longer worked when more
declaration types were added. Here's an example:</p>
<pre lang="js"><code>// Original code
{
using x = new Resource()
x.activate()
}
<p>// Old output (with --minify)<br />
new Resource().activate();</p>
<p>// New output (with --minify)<br />
{using e=new Resource;e.activate()}<br />
</code></pre></p>
</li>
<li>
<p>Fix module evaluation when an error is thrown (<a
href="https://redirect.github.com/evanw/esbuild/issues/4461">#4461</a>,
<a
href="https://redirect.github.com/evanw/esbuild/pull/4467">#4467</a>)</p>
<p>If an error is thrown during module evaluation, esbuild previously
didn't preserve the state of the module for subsequent module
references. This was observable if <code>import()</code> or
<code>require()</code> is used to import a module multiple times. The
thrown error is supposed to be thrown by every call to
<code>import()</code> or <code>require()</code>, not just the first.
With this release, esbuild will now throw the same error every time you
call <code>import()</code> or <code>require()</code> on a module that
throws during its evaluation.</p>
</li>
<li>
<p>Fix some edge cases around the <code>new</code> operator (<a
href="https://redirect.github.com/evanw/esbuild/issues/4477">#4477</a>)</p>
<p>Previously esbuild incorrectly printed certain edge cases involving
complex expressions inside the target of a <code>new</code> expression
(specifically an optional chain and/or a tagged template literal). The
generated code for the <code>new</code> target was not correctly wrapped
with parentheses, and either contained a syntax error or had different
semantics. These edge cases have been fixed so that they now correctly
wrap the <code>new</code> target in parentheses. Here is an example of
some affected code:</p>
<pre lang="js"><code>// Original code
new (foo()`bar`)()
new (foo()?.bar)()
<p>// Old output<br />
new foo()<code>bar</code>();<br />
new (foo())?.bar();<br />
</code></pre></p>
</li>
</ul>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="bb9db84c02"><code>bb9db84</code></a>
publish 0.28.1 to npm</li>
<li><a
href="9ff053e53b"><code>9ff053e</code></a>
security: add integrity checks to the Deno API</li>
<li><a
href="0a9bf2135b"><code>0a9bf21</code></a>
enforce non-negative size in gzip parser</li>
<li><a
href="e2a1a71320"><code>e2a1a71</code></a>
security: forbid <code>\\</code> in local dev server requests</li>
<li><a
href="83a2cbfc35"><code>83a2cbf</code></a>
fix <a
href="https://redirect.github.com/evanw/esbuild/issues/4482">#4482</a>:
don't inline <code>using</code> declarations</li>
<li><a
href="308ad745d8"><code>308ad74</code></a>
fix <a
href="https://redirect.github.com/evanw/esbuild/issues/4471">#4471</a>:
renaming of nested <code>var</code> declarations</li>
<li><a
href="f013f5f99a"><code>f013f5f</code></a>
fix some typos</li>
<li><a
href="aafd6e48b1"><code>aafd6e4</code></a>
chore: fix some minor issues in comments (<a
href="https://redirect.github.com/evanw/esbuild/issues/4462">#4462</a>)</li>
<li><a
href="15300c30b5"><code>15300c3</code></a>
follow up: cjs evaluation fixes</li>
<li><a
href="1bda0c31d7"><code>1bda0c3</code></a>
fix <a
href="https://redirect.github.com/evanw/esbuild/issues/4461">#4461</a>,
fix <a
href="https://redirect.github.com/evanw/esbuild/issues/4467">#4467</a>:
esm evaluation fixes</li>
<li>Additional commits viewable in <a
href="https://github.com/evanw/esbuild/compare/v0.28.0...v0.28.1">compare
view</a></li>
</ul>
</details>
<br />
Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Bumps [hono](https://github.com/honojs/hono) from 4.12.18 to 4.12.23.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/honojs/hono/releases">hono's
releases</a>.</em></p>
<blockquote>
<h2>v4.12.23</h2>
<h2>What's Changed</h2>
<ul>
<li>fix(serve-static): normalize all backslashes in file paths, not just
the first in <a
href="https://redirect.github.com/honojs/hono/pull/4962">honojs/hono#4962</a></li>
<li>feat(context): export the Context class publicly by <a
href="https://github.com/BlankParticle"><code>@BlankParticle</code></a>
in <a
href="https://redirect.github.com/honojs/hono/pull/4543">honojs/hono#4543</a></li>
<li>docs(contribution): add AI Usage Policy by <a
href="https://github.com/yusukebe"><code>@yusukebe</code></a> in <a
href="https://redirect.github.com/honojs/hono/pull/4970">honojs/hono#4970</a></li>
<li>feat(compress): add contentTypeFilter option and
<code>COMPRESSIBLE_CONTENT_TYPE_REGEX</code> re-export by <a
href="https://github.com/na-trium-144"><code>@na-trium-144</code></a>
in <a
href="https://redirect.github.com/honojs/hono/pull/4961">honojs/hono#4961</a></li>
<li>fix(utils/ipaddr): do not compress a single 0 group to
<code>::</code> by <a
href="https://github.com/yusukebe"><code>@yusukebe</code></a> in <a
href="https://redirect.github.com/honojs/hono/pull/4971">honojs/hono#4971</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/honojs/hono/compare/v4.12.22...v4.12.23">https://github.com/honojs/hono/compare/v4.12.22...v4.12.23</a></p>
<h2>v4.12.22</h2>
<h2>What's Changed</h2>
<ul>
<li>chore: update vitest to v4 and cleanups by <a
href="https://github.com/BlankParticle"><code>@BlankParticle</code></a>
in <a
href="https://redirect.github.com/honojs/hono/pull/4952">honojs/hono#4952</a></li>
<li>fix(mime): specify charset parameter per MIME type instead of
mechanical detection by <a
href="https://github.com/renatograsso10"><code>@renatograsso10</code></a>
in <a
href="https://redirect.github.com/honojs/hono/pull/4912">honojs/hono#4912</a></li>
<li>fix(compress): respect Accept-Encoding when encoding option is set
by <a href="https://github.com/LeSingh1"><code>@LeSingh1</code></a> in
<a
href="https://redirect.github.com/honojs/hono/pull/4951">honojs/hono#4951</a></li>
<li>fix(deno): echo negotiated WebSocket subprotocol in upgrade response
by <a href="https://github.com/ATOM00blue"><code>@ATOM00blue</code></a>
in <a
href="https://redirect.github.com/honojs/hono/pull/4955">honojs/hono#4955</a></li>
<li>feat: add msgpack as a compressible content type by <a
href="https://github.com/na-trium-144"><code>@na-trium-144</code></a>
in <a
href="https://redirect.github.com/honojs/hono/pull/4957">honojs/hono#4957</a></li>
</ul>
<h2>New Contributors</h2>
<ul>
<li><a
href="https://github.com/renatograsso10"><code>@renatograsso10</code></a>
made their first contribution in <a
href="https://redirect.github.com/honojs/hono/pull/4912">honojs/hono#4912</a></li>
<li><a href="https://github.com/LeSingh1"><code>@LeSingh1</code></a>
made their first contribution in <a
href="https://redirect.github.com/honojs/hono/pull/4951">honojs/hono#4951</a></li>
<li><a
href="https://github.com/ATOM00blue"><code>@ATOM00blue</code></a> made
their first contribution in <a
href="https://redirect.github.com/honojs/hono/pull/4955">honojs/hono#4955</a></li>
<li><a
href="https://github.com/na-trium-144"><code>@na-trium-144</code></a>
made their first contribution in <a
href="https://redirect.github.com/honojs/hono/pull/4957">honojs/hono#4957</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/honojs/hono/compare/v4.12.21...v4.12.22">https://github.com/honojs/hono/compare/v4.12.21...v4.12.22</a></p>
<h2>v4.12.21</h2>
<h2>Security fixes</h2>
<p>This release includes fixes for the following security issues:</p>
<h3>app.mount() strips mount prefix using undecoded path, causing
incorrect routing for percent-encoded paths</h3>
<p>Affects: <code>app.mount()</code>. Fixes prefix stripping using the
raw URL pathname instead of the decoded path, where percent-encoded
characters in the mount prefix or path could cause the prefix to be
removed at the wrong position, resulting in the sub-application
receiving an incorrect path. GHSA-2gcr-mfcq-wcc3</p>
<h3>IP Restriction bypasses static deny rules for non-canonical
IPv6</h3>
<p>Affects: <code>hono/ip-restriction</code>. Fixes IP address
comparison using string equality, where non-canonical IPv6
representations of a denied address — such as compressed forms or
hex-notation IPv4-mapped addresses — could bypass static deny rules.
GHSA-xrhx-7g5j-rcj5</p>
<h3>Cookie helper does not sanitize sameSite and priority, allowing
Set-Cookie injection</h3>
<p>Affects: <code>hono/cookie</code>. Fixes missing validation of
<code>sameSite</code> and <code>priority</code> options against
injection characters (<code>;</code>, <code>\r</code>, <code>\n</code>),
where user-controlled input passed to either option could inject
additional attributes into the Set-Cookie response header.
GHSA-3hrh-pfw6-9m5x</p>
<h3>JWT middleware accepts any Authorization scheme, not only
Bearer</h3>
<p>Affects: <code>hono/jwt</code>, <code>hono/jwk</code>. Fixes missing
scheme validation in the Authorization header, where any two-part header
value was accepted regardless of the scheme name, allowing non-Bearer
schemes to pass JWT authentication. GHSA-f577-qrjj-4474</p>
<hr />
<p>Users who use <code>app.mount()</code>,
<code>hono/ip-restriction</code>, <code>hono/cookie</code>, or
<code>hono/jwt</code>/<code>hono/jwk</code> are encouraged to upgrade to
this version.</p>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="83bfb3bb4a"><code>83bfb3b</code></a>
4.12.23</li>
<li><a
href="bcd290a64c"><code>bcd290a</code></a>
fix(utils/ipaddr): do not compress a single 0 group to <code>::</code>
(<a
href="https://redirect.github.com/honojs/hono/issues/4971">#4971</a>)</li>
<li><a
href="c968177d9c"><code>c968177</code></a>
feat(compress): add contentTypeFilter option and
`COMPRESSIBLE_CONTENT_TYPE_R...</li>
<li><a
href="0265a5453a"><code>0265a54</code></a>
docs(contribution): add AI Usage Policy (<a
href="https://redirect.github.com/honojs/hono/issues/4970">#4970</a>)</li>
<li><a
href="c84c5d2d46"><code>c84c5d2</code></a>
feat(context): export the Context class publicly (<a
href="https://redirect.github.com/honojs/hono/issues/4543">#4543</a>)</li>
<li><a
href="82dad6297c"><code>82dad62</code></a>
fix(serve-static): normalize all backslashes in file paths, not just the
firs...</li>
<li><a
href="2f01b774b1"><code>2f01b77</code></a>
4.12.22</li>
<li><a
href="6bc0dff277"><code>6bc0dff</code></a>
feat: add msgpack as a compressible content type (<a
href="https://redirect.github.com/honojs/hono/issues/4957">#4957</a>)</li>
<li><a
href="7e0555d14c"><code>7e0555d</code></a>
fix(deno): echo negotiated WebSocket subprotocol in upgrade response (<a
href="https://redirect.github.com/honojs/hono/issues/4955">#4955</a>)</li>
<li><a
href="f0ed246591"><code>f0ed246</code></a>
fix(compress): respect Accept-Encoding when encoding option is set (<a
href="https://redirect.github.com/honojs/hono/issues/4951">#4951</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/honojs/hono/compare/v4.12.18...v4.12.23">compare
view</a></li>
</ul>
</details>
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Bumps [qs](https://github.com/ljharb/qs) from 6.14.2 to 6.15.2.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/ljharb/qs/blob/main/CHANGELOG.md">qs's
changelog</a>.</em></p>
<blockquote>
<h2><strong>6.15.2</strong></h2>
<ul>
<li>[Fix] <code>stringify</code>: skip null/undefined entries in
<code>arrayFormat: 'comma'</code> + <code>encodeValuesOnly</code>
instead of crashing in <code>encoder</code></li>
<li>[Fix] <code>stringify</code>: use configured <code>delimiter</code>
after <code>charsetSentinel</code> (<a
href="https://redirect.github.com/ljharb/qs/issues/555">#555</a>)</li>
<li>[Fix] <code>stringify</code>: apply <code>formatter</code> to
encoded key under <code>strictNullHandling</code> (<a
href="https://redirect.github.com/ljharb/qs/issues/554">#554</a>)</li>
<li>[Fix] <code>stringify</code>: skip null/undefined filter-array
entries instead of crashing in <code>encoder</code> (<a
href="https://redirect.github.com/ljharb/qs/issues/551">#551</a>)</li>
<li>[Fix] <code>parse</code>: handle nested bracket groups and add
regression tests (<a
href="https://redirect.github.com/ljharb/qs/issues/530">#530</a>)</li>
<li>[readme] fix grammar (<a
href="https://redirect.github.com/ljharb/qs/issues/550">#550</a>)</li>
<li>[Dev Deps] update <code>@ljharb/eslint-config</code></li>
<li>[Tests] add regression tests for keys containing percent-encoded
bracket text</li>
</ul>
<h2><strong>6.15.1</strong></h2>
<ul>
<li>[Fix] <code>parse</code>: <code>parameterLimit: Infinity</code> with
<code>throwOnLimitExceeded: true</code> silently drops all
parameters</li>
<li>[Deps] update <code>@ljharb/eslint-config</code></li>
<li>[Dev Deps] update <code>@ljharb/eslint-config</code>,
<code>iconv-lite</code></li>
<li>[Tests] increase coverage</li>
</ul>
<h2><strong>6.15.0</strong></h2>
<ul>
<li>[New] <code>parse</code>: add <code>strictMerge</code> option to
wrap object/primitive conflicts in an array (<a
href="https://redirect.github.com/ljharb/qs/issues/425">#425</a>, <a
href="https://redirect.github.com/ljharb/qs/issues/122">#122</a>)</li>
<li>[Fix] <code>duplicates</code> option should not apply to bracket
notation keys (<a
href="https://redirect.github.com/ljharb/qs/issues/514">#514</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="9aca4076fe"><code>9aca407</code></a>
v6.15.2</li>
<li><a
href="5e33d33447"><code>5e33d33</code></a>
[Dev Deps] update <code>@ljharb/eslint-config</code></li>
<li><a
href="21f80b33e5"><code>21f80b3</code></a>
[Fix] <code>stringify</code>: skip null/undefined entries in
<code>arrayFormat: 'comma'</code> + `e...</li>
<li><a
href="a0a81ea207"><code>a0a81ea</code></a>
[Fix] <code>stringify</code>: use configured <code>delimiter</code>
after <code>charsetSentinel</code></li>
<li><a
href="e3062f78f5"><code>e3062f7</code></a>
[Fix] <code>stringify</code>: apply <code>formatter</code> to encoded
key under <code>strictNullHandling</code></li>
<li><a
href="0c180a40ad"><code>0c180a4</code></a>
[Fix] <code>stringify</code>: skip null/undefined filter-array entries
instead of crashi...</li>
<li><a
href="3a8b94aec1"><code>3a8b94a</code></a>
[Tests] add regression tests for keys containing percent-encoded bracket
text</li>
<li><a
href="96755abd35"><code>96755ab</code></a>
[readme] fix grammar</li>
<li><a
href="a419ce5bbf"><code>a419ce5</code></a>
[Fix] <code>parse</code>: handle nested bracket groups and add
regression tests</li>
<li><a
href="3f5e1c528c"><code>3f5e1c5</code></a>
v6.15.1</li>
<li>Additional commits viewable in <a
href="https://github.com/ljharb/qs/compare/v6.14.2...v6.15.2">compare
view</a></li>
</ul>
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closes#544
Replaces opaque `JsonObject?` modelling of `elicitation` with a typed
`ClientCapabilities.Elicitation` (`form`, `url`), and adds the new
`tasks` capability on both `ClientCapabilities` and `ServerCapabilities`
(with `list`, `cancel`, per-request-type augmentation). Wires capability
assertions for `tasks/*` methods and `notifications/tasks/status` into
`Client` and `ServerSession`
## How Has This Been Tested?
unit tests
## Breaking Changes
yes
now elicitation is a specific class in capabilities
## Types of changes
- [ ] Bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [x] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update
## Checklist
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [x] I have added appropriate error handling
- [x] I have added or updated documentation as needed
Drops`dev.mokksy:mokksy` dependency
## Motivation and Context
`mokksy` is a niche, single-maintainer library with very limited
external adoption, introduced by its own author. Keeping a test-only
dependency on it is unnecessary supply-chain exposure given that the two
patterns already used in this repo, `MockEngine` for transport-level
tests and `embeddedServer` for integration-level tests, cover everything
it provided.
## Breaking Changes
none
## Types of changes
- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update
## Checklist
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [x] I have added appropriate error handling
- [x] I have added or updated documentation as needed
Bumps [hono](https://github.com/honojs/hono) from 4.12.14 to 4.12.18.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/honojs/hono/releases">hono's
releases</a>.</em></p>
<blockquote>
<h2>v4.12.18</h2>
<h2>Security fixes</h2>
<p>This release includes fixes for the following security issues:</p>
<h3>Cache Middleware ignores Vary: Authorization / Vary: Cookie leading
to cross-user cache leakage</h3>
<p>Affects: Cache Middleware. Fixes missing cache-skip handling for
<code>Vary: Authorization</code> and <code>Vary: Cookie</code>, where a
response cached for one authenticated user could be served to other
users. GHSA-p77w-8qqv-26rm</p>
<h3>CSS Declaration Injection via Style Object Values in JSX SSR</h3>
<p>Affects: hono/jsx. Fixes a missing CSS-context escape for
<code>style</code> object values and property names, where untrusted
input could inject additional CSS declarations. The impact is limited to
CSS and does not allow JavaScript execution. GHSA-qp7p-654g-cw7p</p>
<h3>Improper validation of NumericDate claims (exp, nbf, iat) in JWT
verify()</h3>
<p>Affects: <code>hono/utils/jwt</code>. Fixes improper validation of
<code>exp</code>, <code>nbf</code>, and <code>iat</code> claims, where
falsy, non-finite, or non-numeric values could silently bypass
time-based checks instead of being rejected per RFC 7519.
GHSA-hm8q-7f3q-5f36</p>
<hr />
<p>Users who use the JWT helper, hono/jsx, or the Cache middleware are
strongly encouraged to upgrade to this version.</p>
<h2>v4.12.17</h2>
<h2>What's Changed</h2>
<ul>
<li>fix(jsx): normalize SVG attributes on the <!-- raw HTML omitted -->
root element by <a
href="https://github.com/kfly8"><code>@kfly8</code></a> in <a
href="https://redirect.github.com/honojs/hono/pull/4893">honojs/hono#4893</a></li>
<li>fix(ssg): add <code>atom+xml</code> and <code>rss+xml</code> to
<code>defaultExtensionMap</code> by <a
href="https://github.com/yuintei"><code>@yuintei</code></a> in <a
href="https://redirect.github.com/honojs/hono/pull/4899">honojs/hono#4899</a></li>
<li>fix(cors): make origin optional in CORSOptions by <a
href="https://github.com/truffle-dev"><code>@truffle-dev</code></a> in
<a
href="https://redirect.github.com/honojs/hono/pull/4905">honojs/hono#4905</a></li>
<li>fix(types): propagate middleware response types to app.on overloads
by <a href="https://github.com/T4ko0522"><code>@T4ko0522</code></a> in
<a
href="https://redirect.github.com/honojs/hono/pull/4906">honojs/hono#4906</a></li>
</ul>
<h2>New Contributors</h2>
<ul>
<li><a href="https://github.com/kfly8"><code>@kfly8</code></a> made
their first contribution in <a
href="https://redirect.github.com/honojs/hono/pull/4893">honojs/hono#4893</a></li>
<li><a
href="https://github.com/truffle-dev"><code>@truffle-dev</code></a>
made their first contribution in <a
href="https://redirect.github.com/honojs/hono/pull/4905">honojs/hono#4905</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/honojs/hono/compare/v4.12.16...v4.12.17">https://github.com/honojs/hono/compare/v4.12.16...v4.12.17</a></p>
<h2>v4.12.16</h2>
<h2>Security fixes</h2>
<p>This release includes fixes for the following security issues:</p>
<h3>Unvalidated JSX Tag Names in hono/jsx May Allow HTML Injection</h3>
<p>Affects: hono/jsx. Fixes missing validation of JSX tag names when
using <code>jsx()</code> or <code>createElement()</code>, which could
allow HTML injection if untrusted input is used as the tag name.
GHSA-69xw-7hcm-h432</p>
<h3>bodyLimit() can be bypassed for chunked / unknown-length
requests</h3>
<p>Affects: Body Limit Middleware. Fixes late enforcement for request
bodies without a reliable Content-Length (e.g. chunked requests), where
oversized requests could reach handlers and return successful responses
before being rejected. GHSA-9vqf-7f2p-gf9v</p>
<h2>v4.12.15</h2>
<h2>What's Changed</h2>
<ul>
<li>fix(jwt): support single-line PEM keys by <a
href="https://github.com/hiendv"><code>@hiendv</code></a> in <a
href="https://redirect.github.com/honojs/hono/pull/4889">honojs/hono#4889</a></li>
</ul>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="f10dee89ce"><code>f10dee8</code></a>
4.12.18</li>
<li><a
href="a5bd9ebead"><code>a5bd9eb</code></a>
Merge commit from fork</li>
<li><a
href="58d3d3ad56"><code>58d3d3a</code></a>
Merge commit from fork</li>
<li><a
href="568c2ecc1d"><code>568c2ec</code></a>
Merge commit from fork</li>
<li><a
href="ff2b3d31df"><code>ff2b3d3</code></a>
4.12.17</li>
<li><a
href="52aaaf9714"><code>52aaaf9</code></a>
fix(types): propagate middleware response types to app.on overloads (<a
href="https://redirect.github.com/honojs/hono/issues/4906">#4906</a>)</li>
<li><a
href="76d5589e9b"><code>76d5589</code></a>
fix(cors): make origin optional in CORSOptions (<a
href="https://redirect.github.com/honojs/hono/issues/4905">#4905</a>)</li>
<li><a
href="8f027e5574"><code>8f027e5</code></a>
fix(ssg): add <code>atom+xml</code> and <code>rss+xml</code> to
<code>defaultExtensionMap</code> (<a
href="https://redirect.github.com/honojs/hono/issues/4899">#4899</a>)</li>
<li><a
href="bfba97ca7e"><code>bfba97c</code></a>
fix(jsx): normalize SVG attributes on the <svg> root element (<a
href="https://redirect.github.com/honojs/hono/issues/4893">#4893</a>)</li>
<li><a
href="90d4182aab"><code>90d4182</code></a>
4.12.16</li>
<li>Additional commits viewable in <a
href="https://github.com/honojs/hono/compare/v4.12.14...v4.12.18">compare
view</a></li>
</ul>
</details>
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Bumps the all-dependencies group with 1 update in the
/integration-test/src/jvmTest/typescript directory:
[zod](https://github.com/colinhacks/zod).
Updates `zod` from 4.3.6 to 4.4.3
<details>
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<p><em>Sourced from <a
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<blockquote>
<h2>v4.4.3</h2>
<h2>Commits:</h2>
<ul>
<li>4c2fa95ce3f3390fbc522324e406b4e9e89b88f9 docs: use Zernio primary
wordmark for gold sponsor logo</li>
<li>2aeec83eb135e3a83756e973ef44845fc5a455d2 docs: prune lapsed gold
sponsors and rebalance logo sizing</li>
<li>7391be88ac1ee5cd02057f5ccc012a1f5df4efd0 docs: prune lapsed
silver/bronze sponsors and add active ones</li>
<li>2c703322a21b4e2b12f33f49ea8430c451a68b4f docs: normalize bronze
sponsor logos to github avatar pattern</li>
<li>9195250cab0e7950efe39c3926d6c203b4b0a170 docs: remove Mintlify from
bronze sponsors (churned)</li>
<li>b8dffe9e62f17e6571e6249d05cc5102b54d94e4 docs: remove Numeric and
Speakeasy (2+ missed monthly cycles)</li>
<li>1cab69383fcdeae2a366d5e2a2fc4d8fc765d168 fix(v4): restore catch
handling for absent object keys (<a
href="https://redirect.github.com/colinhacks/zod/issues/5937">#5937</a>)
(<a
href="https://redirect.github.com/colinhacks/zod/issues/5939">#5939</a>)</li>
<li>c2be4f819064eed62c7c350a2d399b5faecd15f8 fix(v4): generalize
optin/fallback to transform; restore preprocess on absent keys (<a
href="https://redirect.github.com/colinhacks/zod/issues/5941">#5941</a>)</li>
<li>f3c9ec03ba7a28ae72d25cc295f38674bee0f559 4.4.3</li>
<li>1fb56a5c18c27102dbc92260a4007c7732a0ccca docs: document release
procedure in AGENTS.md</li>
</ul>
<h2>v4.4.2</h2>
<h2>Commits:</h2>
<ul>
<li>0c62df0ea19fd05abdf90473e9eef7eea530fab2 Clean up docs navigation
and stale labels (<a
href="https://redirect.github.com/colinhacks/zod/issues/5901">#5901</a>)</li>
<li>20cc794895cc8604fe0c87d83a5d1c3f89fad0ac chore: add security policy
and refresh tooling deps</li>
<li>6fbe07b0177efdd1bf1c0b05160e70d7a0702337 fix(docs): heading anchor
links now include the hash so it doesnt scoll all the way up, follows
navbar logic (<a
href="https://redirect.github.com/colinhacks/zod/issues/5791">#5791</a>)</li>
<li>4bbed1b1c73eca4ce9e59b1189ed236aa6c8b5bd Tighten discriminated union
option typing</li>
<li>bbac3e567e7fccfaaf7cdc97f1ce30c295e2c908 Update PR guidance for
agents</li>
<li>cf0dc942a32805c292fff59ade20a7ace980735a Merge remote-tracking
branch 'origin/main' into fix-discriminated-union-key-constraint</li>
<li>292c894a5fd2aa42e527900b83d8d7a3009a709c docs: add Zernio gold
sponsor</li>
<li>1fc9f311c28dcf80d0bb5a36b177086cbc3d8eca docs: document codec
inversion</li>
<li>1373c85da9aeff704a9762d27bc58699618aefb7 docs: remove AI disclosure
guidance</li>
<li>e20d02b473c08e3a4e557bc610b1b5fac079b649 chore: ignore triage
notes</li>
<li>e58ea4d91b1dfe8194b73508203213cbc7e9c936 docs: test Zod Mini tab
code heights</li>
<li>905761a5d127e8d5dd2ebb3bc88c75cb0b8149ff docs: document preprocess
input type narrowing</li>
<li>bf64bac850d4dee2b7dde7e64909d5d796d32043 chore: tighten test
guidance in AGENTS.md</li>
<li>8ec4e73f4c4693b6361ad591be40fb41eb8a9f95 chore: update play.ts
scratch</li>
<li>02c2baf7d0d615872fa4528a8020603b71211702 Make z.preprocess defer
optionality to inner schema (<a
href="https://redirect.github.com/colinhacks/zod/issues/5929">#5929</a>)</li>
<li>88015df8e25c44fb5385eb3ef28935119cd5edea fix(docs): drop deprecated
<code>baseUrl</code> from tsconfig</li>
<li>c59d4474e3b4cad1b323462186cf607178ce8267 4.4.2</li>
</ul>
<h2>v4.4.1</h2>
<h2>Commits:</h2>
<ul>
<li>481f7be4238c83ed58183f921b2646f340a91c6a ci: gate release publishing
on full test workflow</li>
<li>95ccab423aec720b2523c3a64cdc7e3204537cc7 test(v3): restore optional
undefined expectations</li>
<li>cede2c63739a5823d6aa5093d291e9a111da943d fix(v4): reject tuple holes
before required defaults (<a
href="https://redirect.github.com/colinhacks/zod/issues/5900">#5900</a>)</li>
<li>edd0bf0f5ada4a8dc581c259407d7bbad0a71ea7 release: 4.4.1</li>
<li>180d83d1dbe6a59260710cc8637a3dea2281ee56 docs: remove Jazz featured
sponsor</li>
</ul>
<h2>v4.4.0</h2>
<h2>4.4.0</h2>
<p>This is a minor release with a wide set of correctness and soundness
fixes. Some fixes intentionally make Zod stricter, so code that depended
on previously accepted invalid or ambiguous inputs may need small
updates.</p>
<h2>Potentially breaking bug fixes</h2>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="1fb56a5c18"><code>1fb56a5</code></a>
docs: document release procedure in AGENTS.md</li>
<li><a
href="f3c9ec03ba"><code>f3c9ec0</code></a>
4.4.3</li>
<li><a
href="c2be4f8190"><code>c2be4f8</code></a>
fix(v4): generalize optin/fallback to transform; restore preprocess on
absent...</li>
<li><a
href="1cab69383f"><code>1cab693</code></a>
fix(v4): restore catch handling for absent object keys (<a
href="https://redirect.github.com/colinhacks/zod/issues/5937">#5937</a>)
(<a
href="https://redirect.github.com/colinhacks/zod/issues/5939">#5939</a>)</li>
<li><a
href="b8dffe9e62"><code>b8dffe9</code></a>
docs: remove Numeric and Speakeasy (2+ missed monthly cycles)</li>
<li><a
href="9195250cab"><code>9195250</code></a>
docs: remove Mintlify from bronze sponsors (churned)</li>
<li><a
href="2c703322a2"><code>2c70332</code></a>
docs: normalize bronze sponsor logos to github avatar pattern</li>
<li><a
href="7391be88ac"><code>7391be8</code></a>
docs: prune lapsed silver/bronze sponsors and add active ones</li>
<li><a
href="2aeec83eb1"><code>2aeec83</code></a>
docs: prune lapsed gold sponsors and rebalance logo sizing</li>
<li><a
href="4c2fa95ce3"><code>4c2fa95</code></a>
docs: use Zernio primary wordmark for gold sponsor logo</li>
<li>Additional commits viewable in <a
href="https://github.com/colinhacks/zod/compare/v4.3.6...v4.4.3">compare
view</a></li>
</ul>
</details>
<details>
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## Motivation and Context
When a GET SSE stream disconnects and the client reconnects on the same
session, the new GET is silently rejected because the previous stream's
`STANDALONE_SSE_STREAM_ID` entry in `streamsMapping` hasn't been cleaned
up yet. Cleanup via `invokeOnCompletion` is asynchronous — there is a
race window where the stale entry persists and blocks reconnection.
Additionally, Ktor's `sse {}` handler commits 200 OK headers before
`handleGetRequest` runs, so the intended
`call.reject(HttpStatusCode.Conflict, ...)` cannot change the
already-committed HTTP status. On all tested engines (test host, CIO,
Netty), clients receive a 200 OK with an immediately-closed empty SSE
stream rather than a 409 Conflict. Server-side `CallLogging` reports 409
(from the response object, not the wire status), which is misleading.
### What this PR does
1. **Explicitly closes the old SSE session** before establishing a new
stream. If the old session is already dead, `close()` is a no-op. This
is the synchronous cleanup that the async `invokeOnCompletion` couldn't
provide.
2. **Replaces `invokeOnCompletion` with `try/finally`** around
`awaitCancellation()` — cleanup runs during cancellation propagation
(earlier in the lifecycle) rather than after job completion. An identity
check (`=== newContext`) ensures only this stream's entry is removed,
not a replacement's.
3. **Adds identity-based removal in `emitOnStream`** — a failed `send()`
on an old stream can no longer accidentally evict the new stream's
mapping.
4. **Rethrows `CancellationException`** instead of swallowing it,
preserving structured concurrency.
The TypeScript reference implementation avoids this race via synchronous
`ReadableStream.cancel()` cleanup. The Kotlin coroutine equivalent
(`invokeOnCompletion`) is inherently async. The Go SDK uses `defer
stream.release()` under a mutex for the same reason. The Java SDK uses
unconditional `AtomicReference.set()` replacement with
`compareAndExchange` on close.
Fixes#715
## How Has This Been Tested?
All tests run against latest `main` (`bf8dc6d`). ktlint and detekt pass
clean.
- 2 new unit tests (Ktor test host): reconnect after disconnect,
concurrent stream takeover
- 2 new integration tests (real CIO embedded server): same scenarios
over real HTTP
- Manual verification against a live Ktor+Netty MCP server (curl):
confirmed 200 OK on the wire with immediately-closed stream on reconnect
(pre-fix), live stream on reconnect (post-fix)
- All existing server unit tests pass (76 total)
- All existing integration tests pass (306 total)
## Breaking Changes
The server no longer returns 409 Conflict for a second GET SSE stream on
the same session. Instead, the old stream is explicitly closed and the
new stream takes over. The 409 was already unreachable as an HTTP status
— Ktor's `sse {}` handler commits 200 OK before the transport handler
runs on all tested engines (test host, CIO, Netty), so clients never
received 409 on the wire.
## Types of changes
- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update
## Checklist
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [x] I have added appropriate error handling
- [x] I have added or updated documentation as needed
## Additional context
This bug likely became reachable after #681 (April 10) fixed the Netty
`appendSseHeaders` crash that previously prevented GET SSE from working
at all on Netty.
Cross-SDK comparison of how each SDK handles a second GET SSE on the
same session:
| SDK | Behavior | Cleanup mechanism | Stale mapping bug? |
|-----|----------|-------------------|-------------------|
| TypeScript (reference) | 409 Conflict | Synchronous
`ReadableStream.cancel()` | No |
| Go | 409 Conflict | `defer stream.release()` under mutex | No |
| Java | Replaces (no 409) | `AtomicReference.set()` +
`compareAndExchange` on close | No |
| C# | 400 Bad Request | Boolean flag, never reset (no reconnect
support) | No |
| Kotlin (before fix) | 409 (unreachable on wire) | Async
`invokeOnCompletion` | **Yes** |
| Kotlin (this PR) | Closes old + replaces | `try/finally` +
identity-based removal | No |
---------
Co-authored-by: devcrocod <devcrocod@gmail.com>
This PR adds the remaining non-security integration tests for the
Streamable HTTP transport as outlined in #183 and left over from #486.
### Changes included:
- **Pagination**: Added cursor-based pagination tests for Prompts,
Resources, and Tools to `Abstract*IntegrationTest`.
- **Bad Request**: Added tests to verify that invalid cursor parameters
correctly throw an `McpException` with `INTERNAL_ERROR`.
- **Logging**: Added `LoggingIntegrationTestStreamableHttp` to
specifically test `setLevel` and logging message notifications over
Streamable HTTP.
*Note: Security (Allow/Deny) tests are intentionally excluded as
discussed in #486, pending further server auth model implementation.*
Co-authored-by: Pavel Gorgulov <devcrocod@gmail.com>
Implements SEP-1577 sampling With tools
closes#409
## How Has This Been Tested?
unit + integration
## Breaking Changes
- binary changes
- MediaContent -> SamplingMessageContent
-
## Types of changes
- [ ] Bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [x] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update
## Checklist
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [x] I have added appropriate error handling
- [x] I have added or updated documentation as needed
Bumps [hono](https://github.com/honojs/hono) from 4.12.12 to 4.12.14.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/honojs/hono/releases">hono's
releases</a>.</em></p>
<blockquote>
<h2>v4.12.14</h2>
<h2>Security fixes</h2>
<p>This release includes fixes for the following security issues:</p>
<h3>Improper handling of JSX attribute names in hono/jsx SSR</h3>
<p>Affects: hono/jsx. Fixes missing validation of JSX attribute names
during server-side rendering, which could allow malformed attribute keys
to corrupt the generated HTML output and inject unintended attributes or
elements. GHSA-458j-xx4x-4375</p>
<h2>Other changes</h2>
<ul>
<li>fix(aws-lambda): handle invalid header names in request processing
(<a
href="https://redirect.github.com/honojs/hono/issues/4883">#4883</a>)
fa2c74fe</li>
</ul>
<h2>v4.12.13</h2>
<h2>What's Changed</h2>
<ul>
<li>fix(types): infer response type from last handler in app.on
9-/10-handler overloads by <a
href="https://github.com/T4ko0522"><code>@T4ko0522</code></a> in <a
href="https://redirect.github.com/honojs/hono/pull/4865">honojs/hono#4865</a></li>
<li>feat(trailing-slash): add <code>skip</code> option by <a
href="https://github.com/yusukebe"><code>@yusukebe</code></a> in <a
href="https://redirect.github.com/honojs/hono/pull/4862">honojs/hono#4862</a></li>
<li>feat(cache): add <code>onCacheNotAvailable</code> option by <a
href="https://github.com/yusukebe"><code>@yusukebe</code></a> in <a
href="https://redirect.github.com/honojs/hono/pull/4876">honojs/hono#4876</a></li>
</ul>
<h2>New Contributors</h2>
<ul>
<li><a href="https://github.com/T4ko0522"><code>@T4ko0522</code></a>
made their first contribution in <a
href="https://redirect.github.com/honojs/hono/pull/4865">honojs/hono#4865</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/honojs/hono/compare/v4.12.12...v4.12.13">https://github.com/honojs/hono/compare/v4.12.12...v4.12.13</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="cf2d2b7edc"><code>cf2d2b7</code></a>
4.12.14</li>
<li><a
href="66daa2edef"><code>66daa2e</code></a>
Merge commit from fork</li>
<li><a
href="fa2c74fe5c"><code>fa2c74f</code></a>
fix(aws-lambda): handle invalid header names in request processing (<a
href="https://redirect.github.com/honojs/hono/issues/4883">#4883</a>)</li>
<li><a
href="3779927c17"><code>3779927</code></a>
4.12.13</li>
<li><a
href="faa6c46a1a"><code>faa6c46</code></a>
feat(cache): add <code>onCacheNotAvailable</code> option (<a
href="https://redirect.github.com/honojs/hono/issues/4876">#4876</a>)</li>
<li><a
href="f23e97b7f3"><code>f23e97b</code></a>
feat(trailing-slash): add <code>skip</code> option (<a
href="https://redirect.github.com/honojs/hono/issues/4862">#4862</a>)</li>
<li><a
href="1aa32fb91e"><code>1aa32fb</code></a>
fix(types): infer response type from last handler in app.on 9- and
10-handler...</li>
<li>See full diff in <a
href="https://github.com/honojs/hono/compare/v4.12.12...v4.12.14">compare
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Add warn-only validation for tool names at registration time, following
the MCP tool naming standard (SEP-986)
closes#417
## How Has This Been Tested?
unit tests
## Breaking Changes
none
## Types of changes
- [ ] Bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update
## Checklist
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [x] I have added appropriate error handling
- [x] I have added or updated documentation as needed
Bumps the all-dependencies group in
/integration-test/src/jvmTest/typescript with 1 update:
[@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node).
Updates `@types/node` from 25.5.2 to 25.6.0
<details>
<summary>Commits</summary>
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Bumps [hono](https://github.com/honojs/hono) from 4.12.9 to 4.12.12.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/honojs/hono/releases">hono's
releases</a>.</em></p>
<blockquote>
<h2>v4.12.12</h2>
<h2>Security fixes</h2>
<p>This release includes fixes for the following security issues:</p>
<h3>Middleware bypass via repeated slashes in serveStatic</h3>
<p>Affects: Serve Static middleware. Fixes a path normalization
inconsistency where repeated slashes (<code>//</code>) could bypass
route-based middleware protections and allow access to protected static
files. GHSA-wmmm-f939-6g9c</p>
<h3>Path traversal in toSSG() allows writing files outside the output
directory</h3>
<p>Affects: <code>toSSG()</code> for Static Site Generation. Fixes a
path traversal issue where crafted <code>ssgParams</code> values could
write files outside the configured output directory.
GHSA-xf4j-xp2r-rqqx</p>
<h3>Incorrect IP matching in ipRestriction() for IPv4-mapped IPv6
addresses</h3>
<p>Affects: IP Restriction Middleware. Fixes improper handling of
IPv4-mapped IPv6 addresses (e.g. <code>::ffff:127.0.0.1</code>) that
could cause allow/deny rules to be bypassed. GHSA-xpcf-pg52-r92g</p>
<h3>Missing validation of cookie name on write path in setCookie()</h3>
<p>Affects: <code>setCookie()</code>, <code>serialize()</code>, and
<code>serializeSigned()</code> from <code>hono/cookie</code>. Fixes
missing validation of cookie names on the write path, preventing
inconsistent handling between parsing and serialization.
GHSA-26pp-8wgv-hjvm</p>
<h3>Non-breaking space prefix bypass in cookie name handling in
getCookie()</h3>
<p>Affects: <code>getCookie()</code> from <code>hono/cookie</code>.
Fixes a discrepancy in cookie name handling that could allow
attacker-controlled cookies to override legitimate ones and bypass
prefix protections. GHSA-r5rp-j6wh-rvv4</p>
<hr />
<p>Users who use Serve Static, Static Site Generation, Cookie utilities,
or IP restriction middleware are strongly encouraged to upgrade to this
version.</p>
<h2>v4.12.11</h2>
<h2>What's Changed</h2>
<ul>
<li>feat(css): add classNameSlug option to createCssContext by <a
href="https://github.com/flow-pie"><code>@flow-pie</code></a> in <a
href="https://redirect.github.com/honojs/hono/pull/4834">honojs/hono#4834</a></li>
</ul>
<h2>New Contributors</h2>
<ul>
<li><a href="https://github.com/flow-pie"><code>@flow-pie</code></a>
made their first contribution in <a
href="https://redirect.github.com/honojs/hono/pull/4834">honojs/hono#4834</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/honojs/hono/compare/v4.12.10...v4.12.11">https://github.com/honojs/hono/compare/v4.12.10...v4.12.11</a></p>
<h2>v4.12.10</h2>
<h2>What's Changed</h2>
<ul>
<li>test(router): fix <code>Simple capturing group</code> test by <a
href="https://github.com/yusukebe"><code>@yusukebe</code></a> in <a
href="https://redirect.github.com/honojs/hono/pull/4838">honojs/hono#4838</a></li>
<li>docs: fix impaired -> inspired typo in benchmark READMEs by <a
href="https://github.com/Abhi3975"><code>@Abhi3975</code></a> in <a
href="https://redirect.github.com/honojs/hono/pull/4843">honojs/hono#4843</a></li>
<li>fix(jsx/dom): apply select value after children are rendered by <a
href="https://github.com/usualoma"><code>@usualoma</code></a> in <a
href="https://redirect.github.com/honojs/hono/pull/4847">honojs/hono#4847</a></li>
<li>fix(compress): convert strong ETag to weak ETag when compressing by
<a href="https://github.com/usualoma"><code>@usualoma</code></a> in <a
href="https://redirect.github.com/honojs/hono/pull/4848">honojs/hono#4848</a></li>
<li>docs(ip-restriction): add clear JSDoc examples and param types by <a
href="https://github.com/VISHNU7KASIREDDY"><code>@VISHNU7KASIREDDY</code></a>
in <a
href="https://redirect.github.com/honojs/hono/pull/4851">honojs/hono#4851</a></li>
</ul>
<h2>New Contributors</h2>
<ul>
<li><a href="https://github.com/Abhi3975"><code>@Abhi3975</code></a>
made their first contribution in <a
href="https://redirect.github.com/honojs/hono/pull/4843">honojs/hono#4843</a></li>
<li><a
href="https://github.com/VISHNU7KASIREDDY"><code>@VISHNU7KASIREDDY</code></a>
made their first contribution in <a
href="https://redirect.github.com/honojs/hono/pull/4851">honojs/hono#4851</a></li>
</ul>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="c37ba26da9"><code>c37ba26</code></a>
4.12.12</li>
<li><a
href="cc067c8559"><code>cc067c8</code></a>
Merge commit from fork</li>
<li><a
href="a586cd72e3"><code>a586cd7</code></a>
Merge commit from fork</li>
<li><a
href="48fa2233bc"><code>48fa223</code></a>
Merge commit from fork</li>
<li><a
href="b470278920"><code>b470278</code></a>
Merge commit from fork</li>
<li><a
href="9aff14bd72"><code>9aff14b</code></a>
Merge commit from fork</li>
<li><a
href="2c403c67eb"><code>2c403c6</code></a>
4.12.11</li>
<li><a
href="f82aba8e8e"><code>f82aba8</code></a>
feat(css): add classNameSlug option to createCssContext (<a
href="https://redirect.github.com/honojs/hono/issues/4834">#4834</a>)</li>
<li><a
href="9f374a55b2"><code>9f374a5</code></a>
4.12.10</li>
<li><a
href="a8c56a6620"><code>a8c56a6</code></a>
docs(ip-restriction): add clear JSDoc examples and param types (<a
href="https://redirect.github.com/honojs/hono/issues/4851">#4851</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/honojs/hono/compare/v4.12.9...v4.12.12">compare
view</a></li>
</ul>
</details>
<br />
Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
closes#546
## How Has This Been Tested?
unit
## Breaking Changes
none
## Types of changes
- [ ] Bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update
## Checklist
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [ ] I have added appropriate error handling
- [ ] I have added or updated documentation as needed
Users currently must manually `install(ContentNegotiation) {
json(McpJson) }` before calling `mcp()`,
`mcpStreamableHttp()`, or `mcpStatelessStreamableHttp()`. Forgetting
this or using the default `json()`
instead of `json(McpJson)` causes silent serialization failures at
runtime (e.g., explicit null fields in JSON-RPC
responses). This PR makes the SDK install it automatically.
Fixes#664
## Changes
- **Core feature** — `mcp()`, `mcpStreamableHttp()`, and
`mcpStatelessStreamableHttp()` now auto-install `ContentNegotiation`
configured with `McpJson`. If the user already installed
`ContentNegotiation`, a warning is logged instead of crashing with
`DuplicatePluginException`.
- **`KtorServerHelpers.kt`** (new) — `installMcpContentNegotiation()`
internal helper with `pluginOrNull` guard and warning
- **`KtorServer.kt`** — calls the helper from all three entry points
- **`build.gradle.kts`** — adds `ktor-server-content-negotiation` and
`ktor-serialization` as `implementation` deps to `kotlin-sdk-server`
- **Removed manual installs** from `ConformanceServer.kt` and
`AbstractStreamableHttpIntegrationTest.kt`.
- **Test infrastructure** — replaced `slf4j-simple` with Logback and use
`ListAppender` (`LogCapture` utility) for deterministic log assertion.
Added `logback-test.xml` matching previous log levels.
- **`StreamableHttpServerConfigurationTest.kt`** (new) — verifies the
warning for all three entry points: `mcpStreamableHttp`,
`mcpStatelessStreamableHttp`, and `mcp` (SSE).
- **README.md** — removed manual `ContentNegotiation` boilerplate from
examples, documented automatic installation, added CORS configuration
snippet for browser-based clients.
- **CI** — added `ktlintCheck` to the Linux build matrix job.
## How Has This Been Tested?
Unit/integration tests. Conformance tests updated
## Breaking Changes
No
## Types of changes
- [x] Bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [x] Documentation update
## Checklist
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [x] I have added appropriate error handling
- [x] I have added or updated documentation as needed
Apply default values from the elicitation schema to the client's
response when the handler returns `Accept` with missing fields
closes#414
## How Has This Been Tested?
integration and conformance tests
## Breaking Changes
none
## Types of changes
- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update
## Checklist
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [x] I have added appropriate error handling
- [x] I have added or updated documentation as needed
dependabot[bot]
UnscientificJsZhai
King Star
Pavel Gorgulov
Takuya Akamatsu
Amr Youssef
johny
Konstantin Pavlov