zed_extension_api: Fork new version of extension API (#44025)

This PR forks a new version of the `zed_extension_api` in preparation
for new changes.

We're jumping from v0.6.0 to v0.8.0 for the WIT because we released
v0.7.0 of the `zed_extension_api` without any WIT changes (it probably
should have been v0.6.1, instead).

Release Notes:

- N/A

Cargo.lock

@@ -21496,6 +21496,8 @@ dependencies = [
 [[package]]
 name = "zed_extension_api"
 version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0729d50b4ca0a7e28e590bbe32e3ca0194d97ef654961451a424c661a366fca0"
 dependencies = [
  "serde",
  "serde_json",
@@ -21504,9 +21506,7 @@ dependencies = [
 
 [[package]]
 name = "zed_extension_api"
-version = "0.7.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0729d50b4ca0a7e28e590bbe32e3ca0194d97ef654961451a424c661a366fca0"
+version = "0.8.0"
 dependencies = [
  "serde",
  "serde_json",
@@ -21524,7 +21524,7 @@ dependencies = [
 name = "zed_html"
 version = "0.2.3"
 dependencies = [
- "zed_extension_api 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "zed_extension_api 0.7.0",
 ]
 
 [[package]]
@@ -21538,7 +21538,7 @@ dependencies = [
 name = "zed_test_extension"
 version = "0.1.0"
 dependencies = [
- "zed_extension_api 0.7.0",
+ "zed_extension_api 0.8.0",
 ]
 
 [[package]]

crates/extension_api/Cargo.toml

@@ -1,12 +1,13 @@
 [package]
 name = "zed_extension_api"
-version = "0.7.0"
+version = "0.8.0"
 description = "APIs for creating Zed extensions in Rust"
 repository = "https://github.com/zed-industries/zed"
 documentation = "https://docs.rs/zed_extension_api"
 keywords = ["zed", "extension"]
 edition.workspace = true
-publish = true
+# Change back to `true` when we're ready to publish v0.8.0.
+publish = false
 license = "Apache-2.0"
 
 [lints]

crates/extension_api/src/extension_api.rs

@@ -334,7 +334,7 @@ mod wit {
 
     wit_bindgen::generate!({
         skip: ["init-extension"],
-        path: "./wit/since_v0.6.0",
+        path: "./wit/since_v0.8.0",
     });
 }
 

crates/extension_api/wit/since_v0.8.0/common.wit

@@ -0,0 +1,12 @@
+interface common {
+    /// A (half-open) range (`[start, end)`).
+    record range {
+        /// The start of the range (inclusive).
+        start: u32,
+        /// The end of the range (exclusive).
+        end: u32,
+    }
+
+    /// A list of environment variables.
+    type env-vars = list<tuple<string, string>>;
+}

crates/extension_api/wit/since_v0.8.0/context-server.wit

@@ -0,0 +1,11 @@
+interface context-server {
+    /// Configuration for context server setup and installation.
+    record context-server-configuration {
+        /// Installation instructions in Markdown format.
+        installation-instructions: string,
+        /// JSON schema for settings validation.
+        settings-schema: string,
+        /// Default settings template.
+        default-settings: string,
+    }
+}

crates/extension_api/wit/since_v0.8.0/dap.wit

@@ -0,0 +1,123 @@
+interface dap {
+    use common.{env-vars};
+
+    /// Resolves a specified TcpArgumentsTemplate into TcpArguments
+    resolve-tcp-template: func(template: tcp-arguments-template) -> result<tcp-arguments, string>;
+
+    record launch-request {
+        program: string,
+        cwd: option<string>,
+        args: list<string>,
+        envs: env-vars,
+    }
+
+    record attach-request {
+        process-id: option<u32>,
+    }
+
+    variant debug-request {
+        launch(launch-request),
+        attach(attach-request)
+    }
+
+    record tcp-arguments {
+        port: u16,
+        host: u32,
+        timeout: option<u64>,
+    }
+
+    record tcp-arguments-template {
+        port: option<u16>,
+        host: option<u32>,
+        timeout: option<u64>,
+    }
+
+    /// Debug Config is the "highest-level" configuration for a debug session.
+    /// It comes from a new process modal UI; thus, it is essentially debug-adapter-agnostic.
+    /// It is expected of the extension to translate this generic configuration into something that can be debugged by the adapter (debug scenario).
+    record debug-config {
+        /// Name of the debug task
+        label: string,
+        /// The debug adapter to use
+        adapter: string,
+        request: debug-request,
+        stop-on-entry: option<bool>,
+    }
+
+    record task-template {
+        /// Human readable name of the task to display in the UI.
+        label: string,
+        /// Executable command to spawn.
+        command: string,
+        args: list<string>,
+        env: env-vars,
+        cwd: option<string>,
+    }
+
+    /// A task template with substituted task variables.
+    type resolved-task = task-template;
+
+    /// A task template for building a debug target.
+    type build-task-template = task-template;
+
+    variant build-task-definition {
+        by-name(string),
+        template(build-task-definition-template-payload )
+    }
+    record build-task-definition-template-payload {
+        locator-name: option<string>,
+        template: build-task-template
+    }
+
+    /// Debug Scenario is the user-facing configuration type (used in debug.json). It is still concerned with what to debug and not necessarily how to do it (except for any
+    /// debug-adapter-specific configuration options).
+    record debug-scenario {
+        /// Unsubstituted label for the task.DebugAdapterBinary
+        label: string,
+        /// Name of the Debug Adapter this configuration is intended for.
+        adapter: string,
+        /// An optional build step to be ran prior to starting a debug session. Build steps are used by Zed's locators to locate the executable to debug.
+        build: option<build-task-definition>,
+        /// JSON-encoded configuration for a given debug adapter.
+        config: string,
+        /// TCP connection parameters (if they were specified by user)
+        tcp-connection: option<tcp-arguments-template>,
+    }
+
+    enum start-debugging-request-arguments-request {
+        launch,
+        attach,
+    }
+
+    record debug-task-definition {
+        /// Unsubstituted label for the task.DebugAdapterBinary
+        label: string,
+        /// Name of the Debug Adapter this configuration is intended for.
+        adapter: string,
+        /// JSON-encoded configuration for a given debug adapter.
+        config: string,
+        /// TCP connection parameters (if they were specified by user)
+        tcp-connection: option<tcp-arguments-template>,
+    }
+
+    record start-debugging-request-arguments {
+        /// JSON-encoded configuration for a given debug adapter. It is specific to each debug adapter.
+        /// `configuration` will have it's Zed variable references substituted prior to being passed to the debug adapter.
+        configuration: string,
+        request: start-debugging-request-arguments-request,
+    }
+
+    /// The lowest-level representation of a debug session, which specifies:
+    /// - How to start a debug adapter process
+    /// - How to start a debug session with it (using DAP protocol)
+    /// for a given debug scenario.
+    record debug-adapter-binary {
+        command: option<string>,
+        arguments: list<string>,
+        envs: env-vars,
+        cwd: option<string>,
+        /// Zed will use TCP transport if `connection` is specified.
+        connection: option<tcp-arguments>,
+        request-args: start-debugging-request-arguments
+    }
+}

crates/extension_api/wit/since_v0.8.0/extension.wit

@@ -0,0 +1,167 @@
+package zed:extension;
+
+world extension {
+    import context-server;
+    import dap;
+    import github;
+    import http-client;
+    import platform;
+    import process;
+    import nodejs;
+
+    use common.{env-vars, range};
+    use context-server.{context-server-configuration};
+    use dap.{attach-request, build-task-template, debug-config, debug-adapter-binary, debug-task-definition, debug-request, debug-scenario, launch-request, resolved-task, start-debugging-request-arguments-request};
+    use lsp.{completion, symbol};
+    use process.{command};
+    use slash-command.{slash-command, slash-command-argument-completion, slash-command-output};
+
+    /// Initializes the extension.
+    export init-extension: func();
+
+    /// The type of a downloaded file.
+    enum downloaded-file-type {
+        /// A gzipped file (`.gz`).
+        gzip,
+        /// A gzipped tar archive (`.tar.gz`).
+        gzip-tar,
+        /// A ZIP file (`.zip`).
+        zip,
+        /// An uncompressed file.
+        uncompressed,
+    }
+
+    /// The installation status for a language server.
+    variant language-server-installation-status {
+        /// The language server has no installation status.
+        none,
+        /// The language server is being downloaded.
+        downloading,
+        /// The language server is checking for updates.
+        checking-for-update,
+        /// The language server installation failed for specified reason.
+        failed(string),
+    }
+
+    record settings-location {
+        worktree-id: u64,
+        path: string,
+    }
+
+    import get-settings: func(path: option<settings-location>, category: string, key: option<string>) -> result<string, string>;
+
+    /// Downloads a file from the given URL and saves it to the given path within the extension's
+    /// working directory.
+    ///
+    /// The file will be extracted according to the given file type.
+    import download-file: func(url: string, file-path: string, file-type: downloaded-file-type) -> result<_, string>;
+
+    /// Makes the file at the given path executable.
+    import make-file-executable: func(filepath: string) -> result<_, string>;
+
+    /// Updates the installation status for the given language server.
+    import set-language-server-installation-status: func(language-server-name: string, status: language-server-installation-status);
+
+    /// A Zed worktree.
+    resource worktree {
+        /// Returns the ID of the worktree.
+        id: func() -> u64;
+        /// Returns the root path of the worktree.
+        root-path: func() -> string;
+        /// Returns the textual contents of the specified file in the worktree.
+        read-text-file: func(path: string) -> result<string, string>;
+        /// Returns the path to the given binary name, if one is present on the `$PATH`.
+        which: func(binary-name: string) -> option<string>;
+        /// Returns the current shell environment.
+        shell-env: func() -> env-vars;
+    }
+
+    /// A Zed project.
+    resource project {
+        /// Returns the IDs of all of the worktrees in this project.
+        worktree-ids: func() -> list<u64>;
+    }
+
+    /// A key-value store.
+    resource key-value-store {
+        /// Inserts an entry under the specified key.
+        insert: func(key: string, value: string) -> result<_, string>;
+    }
+
+    /// Returns the command used to start up the language server.
+    export language-server-command: func(language-server-id: string, worktree: borrow<worktree>) -> result<command, string>;
+
+    /// Returns the initialization options to pass to the language server on startup.
+    ///
+    /// The initialization options are represented as a JSON string.
+    export language-server-initialization-options: func(language-server-id: string, worktree: borrow<worktree>) -> result<option<string>, string>;
+
+    /// Returns the workspace configuration options to pass to the language server.
+    export language-server-workspace-configuration: func(language-server-id: string, worktree: borrow<worktree>) -> result<option<string>, string>;
+
+    /// Returns the initialization options to pass to the other language server.
+    export language-server-additional-initialization-options: func(language-server-id: string, target-language-server-id: string, worktree: borrow<worktree>) -> result<option<string>, string>;
+
+    /// Returns the workspace configuration options to pass to the other language server.
+    export language-server-additional-workspace-configuration: func(language-server-id: string, target-language-server-id: string, worktree: borrow<worktree>) -> result<option<string>, string>;
+
+    /// A label containing some code.
+    record code-label {
+        /// The source code to parse with Tree-sitter.
+        code: string,
+        /// The spans to display in the label.
+        spans: list<code-label-span>,
+        /// The range of the displayed label to include when filtering.
+        filter-range: range,
+    }
+
+    /// A span within a code label.
+    variant code-label-span {
+        /// A range into the parsed code.
+        code-range(range),
+        /// A span containing a code literal.
+        literal(code-label-span-literal),
+    }
+
+    /// A span containing a code literal.
+    record code-label-span-literal {
+        /// The literal text.
+        text: string,
+        /// The name of the highlight to use for this literal.
+        highlight-name: option<string>,
+    }
+
+    export labels-for-completions: func(language-server-id: string, completions: list<completion>) -> result<list<option<code-label>>, string>;
+    export labels-for-symbols: func(language-server-id: string, symbols: list<symbol>) -> result<list<option<code-label>>, string>;
+
+
+    /// Returns the completions that should be shown when completing the provided slash command with the given query.
+    export complete-slash-command-argument: func(command: slash-command, args: list<string>) -> result<list<slash-command-argument-completion>, string>;
+
+    /// Returns the output from running the provided slash command.
+    export run-slash-command: func(command: slash-command, args: list<string>, worktree: option<borrow<worktree>>) -> result<slash-command-output, string>;
+
+    /// Returns the command used to start up a context server.
+    export context-server-command: func(context-server-id: string, project: borrow<project>) -> result<command, string>;
+
+    /// Returns the configuration for a context server.
+    export context-server-configuration: func(context-server-id: string, project: borrow<project>) -> result<option<context-server-configuration>, string>;
+
+    /// Returns a list of packages as suggestions to be included in the `/docs`
+    /// search results.
+    ///
+    /// This can be used to provide completions for known packages (e.g., from the
+    /// local project or a registry) before a package has been indexed.
+    export suggest-docs-packages: func(provider-name: string) -> result<list<string>, string>;
+
+    /// Indexes the docs for the specified package.
+    export index-docs: func(provider-name: string, package-name: string, database: borrow<key-value-store>) -> result<_, string>;
+
+    /// Returns a configured debug adapter binary for a given debug task.
+    export get-dap-binary: func(adapter-name: string, config: debug-task-definition, user-installed-path: option<string>, worktree: borrow<worktree>) -> result<debug-adapter-binary, string>;
+    /// Returns the kind of a debug scenario (launch or attach).
+    export dap-request-kind: func(adapter-name: string, config: string) -> result<start-debugging-request-arguments-request, string>;
+    export dap-config-to-scenario: func(config: debug-config) -> result<debug-scenario, string>;
+    export dap-locator-create-scenario: func(locator-name: string, build-config-template: build-task-template, resolved-label: string, debug-adapter-name: string) -> option<debug-scenario>;
+    export run-dap-locator: func(locator-name: string, config: resolved-task) -> result<debug-request, string>;
+}

crates/extension_api/wit/since_v0.8.0/github.wit

@@ -0,0 +1,35 @@
+interface github {
+    /// A GitHub release.
+    record github-release {
+        /// The version of the release.
+        version: string,
+        /// The list of assets attached to the release.
+        assets: list<github-release-asset>,
+    }
+
+    /// An asset from a GitHub release.
+    record github-release-asset {
+        /// The name of the asset.
+        name: string,
+        /// The download URL for the asset.
+        download-url: string,
+    }
+
+    /// The options used to filter down GitHub releases.
+    record github-release-options {
+        /// Whether releases without assets should be included.
+        require-assets: bool,
+        /// Whether pre-releases should be included.
+        pre-release: bool,
+    }
+
+    /// Returns the latest release for the given GitHub repository.
+    ///
+    /// Takes repo as a string in the form "<owner-name>/<repo-name>", for example: "zed-industries/zed".
+    latest-github-release: func(repo: string, options: github-release-options) -> result<github-release, string>;
+
+    /// Returns the GitHub release with the specified tag name for the given GitHub repository.
+    ///
+    /// Returns an error if a release with the given tag name does not exist.
+    github-release-by-tag-name: func(repo: string, tag: string) -> result<github-release, string>;
+}

crates/extension_api/wit/since_v0.8.0/http-client.wit

@@ -0,0 +1,67 @@
+interface http-client {
+    /// An HTTP request.
+    record http-request {
+        /// The HTTP method for the request.
+        method: http-method,
+        /// The URL to which the request should be made.
+        url: string,
+        /// The headers for the request.
+        headers: list<tuple<string, string>>,
+        /// The request body.
+        body: option<list<u8>>,
+        /// The policy to use for redirects.
+        redirect-policy: redirect-policy,
+    }
+
+    /// HTTP methods.
+    enum http-method {
+        /// `GET`
+        get,
+        /// `HEAD`
+        head,
+        /// `POST`
+        post,
+        /// `PUT`
+        put,
+        /// `DELETE`
+        delete,
+        /// `OPTIONS`
+        options,
+        /// `PATCH`
+        patch,
+    }
+
+    /// The policy for dealing with redirects received from the server.
+    variant redirect-policy {
+        /// Redirects from the server will not be followed.
+        ///
+        /// This is the default behavior.
+        no-follow,
+        /// Redirects from the server will be followed up to the specified limit.
+        follow-limit(u32),
+        /// All redirects from the server will be followed.
+        follow-all,
+    }
+
+    /// An HTTP response.
+    record http-response {
+        /// The response headers.
+        headers: list<tuple<string, string>>,
+        /// The response body.
+        body: list<u8>,
+    }
+
+    /// Performs an HTTP request and returns the response.
+    fetch: func(req: http-request) -> result<http-response, string>;
+
+    /// An HTTP response stream.
+    resource http-response-stream {
+        /// Retrieves the next chunk of data from the response stream.
+        ///
+        /// Returns `Ok(None)` if the stream has ended.
+        next-chunk: func() -> result<option<list<u8>>, string>;
+    }
+
+    /// Performs an HTTP request and returns a response stream.
+    fetch-stream: func(req: http-request) -> result<http-response-stream, string>;
+}

crates/extension_api/wit/since_v0.8.0/lsp.wit

@@ -0,0 +1,90 @@
+interface lsp {
+    /// An LSP completion.
+    record completion {
+        label: string,
+        label-details: option<completion-label-details>,
+        detail: option<string>,
+        kind: option<completion-kind>,
+        insert-text-format: option<insert-text-format>,
+    }
+
+    /// The kind of an LSP completion.
+    variant completion-kind {
+        text,
+        method,
+        function,
+        %constructor,
+        field,
+        variable,
+        class,
+        %interface,
+        module,
+        property,
+        unit,
+        value,
+        %enum,
+        keyword,
+        snippet,
+        color,
+        file,
+        reference,
+        folder,
+        enum-member,
+        constant,
+        struct,
+        event,
+        operator,
+        type-parameter,
+        other(s32),
+    }
+
+    /// Label details for an LSP completion.
+    record completion-label-details {
+        detail: option<string>,
+        description: option<string>,
+    }
+
+    /// Defines how to interpret the insert text in a completion item.
+    variant insert-text-format {
+        plain-text,
+        snippet,
+        other(s32),
+    }
+
+    /// An LSP symbol.
+    record symbol {
+        kind: symbol-kind,
+        name: string,
+    }
+
+    /// The kind of an LSP symbol.
+    variant symbol-kind {
+        file,
+        module,
+        namespace,
+        %package,
+        class,
+        method,
+        property,
+        field,
+        %constructor,
+        %enum,
+        %interface,
+        function,
+        variable,
+        constant,
+        %string,
+        number,
+        boolean,
+        array,
+        object,
+        key,
+        null,
+        enum-member,
+        struct,
+        event,
+        operator,
+        type-parameter,
+        other(s32),
+    }
+}

crates/extension_api/wit/since_v0.8.0/nodejs.wit

@@ -0,0 +1,13 @@
+interface nodejs {
+    /// Returns the path to the Node binary used by Zed.
+    node-binary-path: func() -> result<string, string>;
+
+    /// Returns the latest version of the given NPM package.
+    npm-package-latest-version: func(package-name: string) -> result<string, string>;
+
+    /// Returns the installed version of the given NPM package, if it exists.
+    npm-package-installed-version: func(package-name: string) -> result<option<string>, string>;
+
+    /// Installs the specified NPM package.
+    npm-install-package: func(package-name: string, version: string) -> result<_, string>;
+}

crates/extension_api/wit/since_v0.8.0/platform.wit

@@ -0,0 +1,24 @@
+interface platform {
+    /// An operating system.
+    enum os {
+        /// macOS.
+        mac,
+        /// Linux.
+        linux,
+        /// Windows.
+        windows,
+    }
+
+    /// A platform architecture.
+    enum architecture {
+        /// AArch64 (e.g., Apple Silicon).
+        aarch64,
+        /// x86.
+        x86,
+        /// x86-64.
+        x8664,
+    }
+
+    /// Gets the current operating system and architecture.
+    current-platform: func() -> tuple<os, architecture>;
+}

crates/extension_api/wit/since_v0.8.0/process.wit

@@ -0,0 +1,29 @@
+interface process {
+    use common.{env-vars};
+
+    /// A command.
+    record command {
+        /// The command to execute.
+        command: string,
+        /// The arguments to pass to the command.
+        args: list<string>,
+        /// The environment variables to set for the command.
+        env: env-vars,
+    }
+
+    /// The output of a finished process.
+    record output {
+        /// The status (exit code) of the process.
+        ///
+        /// On Unix, this will be `None` if the process was terminated by a signal.
+        status: option<s32>,
+        /// The data that the process wrote to stdout.
+        stdout: list<u8>,
+        /// The data that the process wrote to stderr.
+        stderr: list<u8>,
+    }
+
+    /// Executes the given command as a child process, waiting for it to finish
+    /// and collecting all of its output.
+    run-command: func(command: command) -> result<output, string>;
+}

crates/extension_api/wit/since_v0.8.0/settings.rs

@@ -0,0 +1,40 @@
+use serde::{Deserialize, Serialize};
+use std::{collections::HashMap, num::NonZeroU32};
+
+/// The settings for a particular language.
+#[derive(Debug, Serialize, Deserialize)]
+pub struct LanguageSettings {
+    /// How many columns a tab should occupy.
+    pub tab_size: NonZeroU32,
+}
+
+/// The settings for a particular language server.
+#[derive(Default, Debug, Serialize, Deserialize)]
+pub struct LspSettings {
+    /// The settings for the language server binary.
+    pub binary: Option<CommandSettings>,
+    /// The initialization options to pass to the language server.
+    pub initialization_options: Option<serde_json::Value>,
+    /// The settings to pass to language server.
+    pub settings: Option<serde_json::Value>,
+}
+
+/// The settings for a particular context server.
+#[derive(Default, Debug, Serialize, Deserialize, PartialEq, Eq)]
+pub struct ContextServerSettings {
+    /// The settings for the context server binary.
+    pub command: Option<CommandSettings>,
+    /// The settings to pass to the context server.
+    pub settings: Option<serde_json::Value>,
+}
+
+/// The settings for a command.
+#[derive(Debug, Serialize, Deserialize, PartialEq, Eq)]
+pub struct CommandSettings {
+    /// The path to the command.
+    pub path: Option<String>,
+    /// The arguments to pass to the command.
+    pub arguments: Option<Vec<String>>,
+    /// The environment variables.
+    pub env: Option<HashMap<String, String>>,
+}

crates/extension_api/wit/since_v0.8.0/slash-command.wit

@@ -0,0 +1,41 @@
+interface slash-command {
+    use common.{range};
+
+    /// A slash command for use in the Assistant.
+    record slash-command {
+        /// The name of the slash command.
+        name: string,
+        /// The description of the slash command.
+        description: string,
+        /// The tooltip text to display for the run button.
+        tooltip-text: string,
+        /// Whether this slash command requires an argument.
+        requires-argument: bool,
+    }
+
+    /// The output of a slash command.
+    record slash-command-output {
+        /// The text produced by the slash command.
+        text: string,
+        /// The list of sections to show in the slash command placeholder.
+        sections: list<slash-command-output-section>,
+    }
+
+    /// A section in the slash command output.
+    record slash-command-output-section {
+        /// The range this section occupies.
+        range: range,
+        /// The label to display in the placeholder for this section.
+        label: string,
+    }
+
+    /// A completion for a slash command argument.
+    record slash-command-argument-completion {
+        /// The label to display for this completion.
+        label: string,
+        /// The new text that should be inserted into the command when this completion is accepted.
+        new-text: string,
+        /// Whether the command should be run when accepting this completion.
+        run-command: bool,
+    }
+}

crates/extension_host/src/wasm_host/wit.rs

@@ -7,6 +7,7 @@ mod since_v0_3_0;
 mod since_v0_4_0;
 mod since_v0_5_0;
 mod since_v0_6_0;
+mod since_v0_8_0;
 use dap::DebugRequest;
 use extension::{DebugTaskDefinition, KeyValueStoreDelegate, WorktreeDelegate};
 use gpui::BackgroundExecutor;
@@ -20,7 +21,7 @@ use crate::wasm_host::wit::since_v0_6_0::dap::StartDebuggingRequestArgumentsRequ
 use super::{WasmState, wasm_engine};
 use anyhow::{Context as _, Result, anyhow};
 use semver::Version;
-use since_v0_6_0 as latest;
+use since_v0_8_0 as latest;
 use std::{ops::RangeInclusive, path::PathBuf, sync::Arc};
 use wasmtime::{
     Store,
@@ -66,7 +67,7 @@ pub fn wasm_api_version_range(release_channel: ReleaseChannel) -> RangeInclusive
 
     let max_version = match release_channel {
         ReleaseChannel::Dev | ReleaseChannel::Nightly => latest::MAX_VERSION,
-        ReleaseChannel::Stable | ReleaseChannel::Preview => latest::MAX_VERSION,
+        ReleaseChannel::Stable | ReleaseChannel::Preview => since_v0_6_0::MAX_VERSION,
     };
 
     since_v0_0_1::MIN_VERSION..=max_version
@@ -95,6 +96,7 @@ pub fn authorize_access_to_unreleased_wasm_api_version(
 }
 
 pub enum Extension {
+    V0_8_0(since_v0_8_0::Extension),
     V0_6_0(since_v0_6_0::Extension),
     V0_5_0(since_v0_5_0::Extension),
     V0_4_0(since_v0_4_0::Extension),
@@ -118,10 +120,21 @@ impl Extension {
         let _ = release_channel;
 
         if version >= latest::MIN_VERSION {
+            authorize_access_to_unreleased_wasm_api_version(release_channel)?;
+
             let extension =
                 latest::Extension::instantiate_async(store, component, latest::linker(executor))
                     .await
                     .context("failed to instantiate wasm extension")?;
+            Ok(Self::V0_8_0(extension))
+        } else if version >= since_v0_6_0::MIN_VERSION {
+            let extension = since_v0_6_0::Extension::instantiate_async(
+                store,
+                component,
+                since_v0_6_0::linker(executor),
+            )
+            .await
+            .context("failed to instantiate wasm extension")?;
             Ok(Self::V0_6_0(extension))
         } else if version >= since_v0_5_0::MIN_VERSION {
             let extension = since_v0_5_0::Extension::instantiate_async(
@@ -200,6 +213,7 @@ impl Extension {
 
     pub async fn call_init_extension(&self, store: &mut Store<WasmState>) -> Result<()> {
         match self {
+            Extension::V0_8_0(ext) => ext.call_init_extension(store).await,
             Extension::V0_6_0(ext) => ext.call_init_extension(store).await,
             Extension::V0_5_0(ext) => ext.call_init_extension(store).await,
             Extension::V0_4_0(ext) => ext.call_init_extension(store).await,
@@ -220,6 +234,10 @@ impl Extension {
         resource: Resource<Arc<dyn WorktreeDelegate>>,
     ) -> Result<Result<Command, String>> {
         match self {
+            Extension::V0_8_0(ext) => {
+                ext.call_language_server_command(store, &language_server_id.0, resource)
+                    .await
+            }
             Extension::V0_6_0(ext) => {
                 ext.call_language_server_command(store, &language_server_id.0, resource)
                     .await
@@ -282,6 +300,14 @@ impl Extension {
         resource: Resource<Arc<dyn WorktreeDelegate>>,
     ) -> Result<Result<Option<String>, String>> {
         match self {
+            Extension::V0_8_0(ext) => {
+                ext.call_language_server_initialization_options(
+                    store,
+                    &language_server_id.0,
+                    resource,
+                )
+                .await
+            }
             Extension::V0_6_0(ext) => {
                 ext.call_language_server_initialization_options(
                     store,
@@ -371,6 +397,14 @@ impl Extension {
         resource: Resource<Arc<dyn WorktreeDelegate>>,
     ) -> Result<Result<Option<String>, String>> {
         match self {
+            Extension::V0_8_0(ext) => {
+                ext.call_language_server_workspace_configuration(
+                    store,
+                    &language_server_id.0,
+                    resource,
+                )
+                .await
+            }
             Extension::V0_6_0(ext) => {
                 ext.call_language_server_workspace_configuration(
                     store,
@@ -439,6 +473,15 @@ impl Extension {
         resource: Resource<Arc<dyn WorktreeDelegate>>,
     ) -> Result<Result<Option<String>, String>> {
         match self {
+            Extension::V0_8_0(ext) => {
+                ext.call_language_server_additional_initialization_options(
+                    store,
+                    &language_server_id.0,
+                    &target_language_server_id.0,
+                    resource,
+                )
+                .await
+            }
             Extension::V0_6_0(ext) => {
                 ext.call_language_server_additional_initialization_options(
                     store,
@@ -483,6 +526,15 @@ impl Extension {
         resource: Resource<Arc<dyn WorktreeDelegate>>,
     ) -> Result<Result<Option<String>, String>> {
         match self {
+            Extension::V0_8_0(ext) => {
+                ext.call_language_server_additional_workspace_configuration(
+                    store,
+                    &language_server_id.0,
+                    &target_language_server_id.0,
+                    resource,
+                )
+                .await
+            }
             Extension::V0_6_0(ext) => {
                 ext.call_language_server_additional_workspace_configuration(
                     store,
@@ -526,10 +578,23 @@ impl Extension {
         completions: Vec<latest::Completion>,
     ) -> Result<Result<Vec<Option<CodeLabel>>, String>> {
         match self {
-            Extension::V0_6_0(ext) => {
+            Extension::V0_8_0(ext) => {
                 ext.call_labels_for_completions(store, &language_server_id.0, &completions)
                     .await
             }
+            Extension::V0_6_0(ext) => Ok(ext
+                .call_labels_for_completions(
+                    store,
+                    &language_server_id.0,
+                    &completions.into_iter().collect::<Vec<_>>(),
+                )
+                .await?
+                .map(|labels| {
+                    labels
+                        .into_iter()
+                        .map(|label| label.map(Into::into))
+                        .collect()
+                })),
             Extension::V0_5_0(ext) => Ok(ext
                 .call_labels_for_completions(
                     store,
@@ -619,10 +684,23 @@ impl Extension {
         symbols: Vec<latest::Symbol>,
     ) -> Result<Result<Vec<Option<CodeLabel>>, String>> {
         match self {
-            Extension::V0_6_0(ext) => {
+            Extension::V0_8_0(ext) => {
                 ext.call_labels_for_symbols(store, &language_server_id.0, &symbols)
                     .await
             }
+            Extension::V0_6_0(ext) => Ok(ext
+                .call_labels_for_symbols(
+                    store,
+                    &language_server_id.0,
+                    &symbols.into_iter().collect::<Vec<_>>(),
+                )
+                .await?
+                .map(|labels| {
+                    labels
+                        .into_iter()
+                        .map(|label| label.map(Into::into))
+                        .collect()
+                })),
             Extension::V0_5_0(ext) => Ok(ext
                 .call_labels_for_symbols(
                     store,
@@ -712,6 +790,10 @@ impl Extension {
         arguments: &[String],
     ) -> Result<Result<Vec<SlashCommandArgumentCompletion>, String>> {
         match self {
+            Extension::V0_8_0(ext) => {
+                ext.call_complete_slash_command_argument(store, command, arguments)
+                    .await
+            }
             Extension::V0_6_0(ext) => {
                 ext.call_complete_slash_command_argument(store, command, arguments)
                     .await
@@ -750,6 +832,10 @@ impl Extension {
         resource: Option<Resource<Arc<dyn WorktreeDelegate>>>,
     ) -> Result<Result<SlashCommandOutput, String>> {
         match self {
+            Extension::V0_8_0(ext) => {
+                ext.call_run_slash_command(store, command, arguments, resource)
+                    .await
+            }
             Extension::V0_6_0(ext) => {
                 ext.call_run_slash_command(store, command, arguments, resource)
                     .await
@@ -787,6 +873,10 @@ impl Extension {
         project: Resource<ExtensionProject>,
     ) -> Result<Result<Command, String>> {
         match self {
+            Extension::V0_8_0(ext) => {
+                ext.call_context_server_command(store, &context_server_id, project)
+                    .await
+            }
             Extension::V0_6_0(ext) => {
                 ext.call_context_server_command(store, &context_server_id, project)
                     .await
@@ -823,6 +913,10 @@ impl Extension {
         project: Resource<ExtensionProject>,
     ) -> Result<Result<Option<ContextServerConfiguration>, String>> {
         match self {
+            Extension::V0_8_0(ext) => {
+                ext.call_context_server_configuration(store, &context_server_id, project)
+                    .await
+            }
             Extension::V0_6_0(ext) => {
                 ext.call_context_server_configuration(store, &context_server_id, project)
                     .await
@@ -849,6 +943,7 @@ impl Extension {
         provider: &str,
     ) -> Result<Result<Vec<String>, String>> {
         match self {
+            Extension::V0_8_0(ext) => ext.call_suggest_docs_packages(store, provider).await,
             Extension::V0_6_0(ext) => ext.call_suggest_docs_packages(store, provider).await,
             Extension::V0_5_0(ext) => ext.call_suggest_docs_packages(store, provider).await,
             Extension::V0_4_0(ext) => ext.call_suggest_docs_packages(store, provider).await,
@@ -869,6 +964,10 @@ impl Extension {
         kv_store: Resource<Arc<dyn KeyValueStoreDelegate>>,
     ) -> Result<Result<(), String>> {
         match self {
+            Extension::V0_8_0(ext) => {
+                ext.call_index_docs(store, provider, package_name, kv_store)
+                    .await
+            }
             Extension::V0_6_0(ext) => {
                 ext.call_index_docs(store, provider, package_name, kv_store)
                     .await
@@ -898,6 +997,7 @@ impl Extension {
             }
         }
     }
+
     pub async fn call_get_dap_binary(
         &self,
         store: &mut Store<WasmState>,
@@ -924,6 +1024,7 @@ impl Extension {
             _ => anyhow::bail!("`get_dap_binary` not available prior to v0.6.0"),
         }
     }
+
     pub async fn call_dap_request_kind(
         &self,
         store: &mut Store<WasmState>,
@@ -944,6 +1045,7 @@ impl Extension {
             _ => anyhow::bail!("`dap_request_kind` not available prior to v0.6.0"),
         }
     }
+
     pub async fn call_dap_config_to_scenario(
         &self,
         store: &mut Store<WasmState>,
@@ -962,6 +1064,7 @@ impl Extension {
             _ => anyhow::bail!("`dap_config_to_scenario` not available prior to v0.6.0"),
         }
     }
+
     pub async fn call_dap_locator_create_scenario(
         &self,
         store: &mut Store<WasmState>,
@@ -988,6 +1091,7 @@ impl Extension {
             _ => anyhow::bail!("`dap_locator_create_scenario` not available prior to v0.6.0"),
         }
     }
+
     pub async fn call_run_dap_locator(
         &self,
         store: &mut Store<WasmState>,