Add dynamic() support to prompt.form() plugin API

- prompt.form() inputs can now have dynamic() callbacks that update
  reactively when form values change (same pattern as auth/template plugins)
- Changed PromptFormRequest routing from one-shot to bidirectional events
- Added PromptFormResponse.done field to distinguish intermediate updates
- Added optional size (enum) to PromptFormRequest for dialog sizing
- Added optional rows to FormInputEditor for fixed height editors
- New httpsnippet plugin: generates code snippets with dynamic language
  and library selectors that update the code preview in real-time

crates-tauri/yaak-app/src/plugin_events.rs

@@ -12,7 +12,7 @@ use chrono::Utc;
 use cookie::Cookie;
 use log::error;
 use std::sync::Arc;
-use tauri::{AppHandle, Emitter, Manager, Runtime};
+use tauri::{AppHandle, Emitter, Listener, Manager, Runtime};
 use tauri_plugin_clipboard_manager::ClipboardExt;
 use tauri_plugin_opener::OpenerExt;
 use yaak_crypto::manager::EncryptionManager;
@@ -59,7 +59,55 @@ pub(crate) async fn handle_plugin_event<R: Runtime>(
         }
         InternalEventPayload::PromptFormRequest(_) => {
             let window = get_window_from_plugin_context(app_handle, &plugin_context)?;
-            Ok(call_frontend(&window, event).await)
+            if event.reply_id.is_some() {
+                // Follow-up update from plugin runtime with resolved inputs — forward to frontend
+                window.emit_to(window.label(), "plugin_event", event.clone())?;
+                Ok(None)
+            } else {
+                // Initial request — set up bidirectional communication
+                window.emit_to(window.label(), "plugin_event", event.clone()).unwrap();
+
+                let event_id = event.id.clone();
+                let plugin_handle = plugin_handle.clone();
+                let plugin_context = plugin_context.clone();
+                let window = window.clone();
+
+                // Spawn async task to handle bidirectional form communication
+                tauri::async_runtime::spawn(async move {
+                    let (tx, mut rx) = tokio::sync::mpsc::channel::<InternalEvent>(128);
+
+                    // Listen for replies from the frontend
+                    let listener_id = window.listen(event_id, move |ev: tauri::Event| {
+                        let resp: InternalEvent = serde_json::from_str(ev.payload()).unwrap();
+                        let _ = tx.try_send(resp);
+                    });
+
+                    // Forward each reply to the plugin runtime
+                    while let Some(resp) = rx.recv().await {
+                        let is_done = matches!(
+                            &resp.payload,
+                            InternalEventPayload::PromptFormResponse(r) if r.done.unwrap_or(false)
+                        );
+
+                        let event_to_send = plugin_handle.build_event_to_send(
+                            &plugin_context,
+                            &resp.payload,
+                            Some(resp.reply_id.unwrap_or_default()),
+                        );
+                        if let Err(e) = plugin_handle.send(&event_to_send).await {
+                            log::warn!("Failed to forward form response to plugin: {:?}", e);
+                        }
+
+                        if is_done {
+                            break;
+                        }
+                    }
+
+                    window.unlisten(listener_id);
+                });
+
+                Ok(None)
+            }
         }
         InternalEventPayload::FindHttpResponsesRequest(req) => {
             let http_responses = app_handle

crates/yaak-plugins/bindings/gen_events.ts

@@ -172,7 +172,11 @@ hideGutter?: boolean,
 /**
  * Language for syntax highlighting
  */
-language?: EditorLanguage, readOnly?: boolean, completionOptions?: Array<GenericCompletionOption>, 
+language?: EditorLanguage, readOnly?: boolean, 
+/**
+ * Fixed number of visible rows
+ */
+rows?: number, completionOptions?: Array<GenericCompletionOption>, 
 /**
  * The name of the input. The value will be stored at this object attribute in the resulting data
  */
@@ -476,9 +480,11 @@ label: string, title?: string, size?: WindowSize, dataDirKey?: string, };
 
 export type PluginContext = { id: string, label: string | null, workspaceId: string | null, };
 
-export type PromptFormRequest = { id: string, title: string, description?: string, inputs: Array<FormInput>, confirmText?: string, cancelText?: string, };
+export type PromptFormRequest = { id: string, title: string, description?: string, inputs: Array<FormInput>, confirmText?: string, cancelText?: string, size?: PromptFormSize, };
 
-export type PromptFormResponse = { values: { [key in string]?: JsonPrimitive } | null, };
+export type PromptFormResponse = { values: { [key in string]?: JsonPrimitive } | null, done?: boolean, };
+
+export type PromptFormSize = "sm" | "md" | "lg" | "full" | "dynamic";
 
 export type PromptTextRequest = { id: string, title: string, label: string, description?: string, defaultValue?: string, placeholder?: string, 
 /**

crates/yaak-plugins/bindings/gen_models.ts

@@ -49,7 +49,7 @@ export type HttpResponseEvent = { model: "http_response_event", id: string, crea
  * This mirrors `yaak_http::sender::HttpResponseEvent` but with serde support.
  * The `From` impl is in yaak-http to avoid circular dependencies.
  */
-export type HttpResponseEventData = { "type": "setting", name: string, value: string, } | { "type": "info", message: string, } | { "type": "redirect", url: string, status: number, behavior: string, } | { "type": "send_url", method: string, path: string, } | { "type": "receive_url", version: string, status: string, } | { "type": "header_up", name: string, value: string, } | { "type": "header_down", name: string, value: string, } | { "type": "chunk_sent", bytes: number, } | { "type": "chunk_received", bytes: number, } | { "type": "dns_resolved", hostname: string, addresses: Array<string>, duration: bigint, overridden: boolean, };
+export type HttpResponseEventData = { "type": "setting", name: string, value: string, } | { "type": "info", message: string, } | { "type": "redirect", url: string, status: number, behavior: string, } | { "type": "send_url", method: string, scheme: string, username: string, password: string, host: string, port: number, path: string, query: string, fragment: string, } | { "type": "receive_url", version: string, status: string, } | { "type": "header_up", name: string, value: string, } | { "type": "header_down", name: string, value: string, } | { "type": "chunk_sent", bytes: number, } | { "type": "chunk_received", bytes: number, } | { "type": "dns_resolved", hostname: string, addresses: Array<string>, duration: bigint, overridden: boolean, };
 
 export type HttpResponseHeader = { name: string, value: string, };
 

crates/yaak-plugins/src/events.rs

@@ -587,6 +587,19 @@ pub struct PromptFormRequest {
     pub confirm_text: Option<String>,
     #[ts(optional)]
     pub cancel_text: Option<String>,
+    #[ts(optional)]
+    pub size: Option<PromptFormSize>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, TS)]
+#[serde(rename_all = "snake_case")]
+#[ts(export, export_to = "gen_events.ts")]
+pub enum PromptFormSize {
+    Sm,
+    Md,
+    Lg,
+    Full,
+    Dynamic,
 }
 
 #[derive(Debug, Clone, Default, Serialize, Deserialize, TS)]
@@ -594,6 +607,8 @@ pub struct PromptFormRequest {
 #[ts(export, export_to = "gen_events.ts")]
 pub struct PromptFormResponse {
     pub values: Option<HashMap<String, JsonPrimitive>>,
+    #[ts(optional)]
+    pub done: Option<bool>,
 }
 
 #[derive(Debug, Clone, Default, Serialize, Deserialize, TS)]
@@ -966,6 +981,10 @@ pub struct FormInputEditor {
     #[ts(optional)]
     pub read_only: Option<bool>,
 
+    /// Fixed number of visible rows
+    #[ts(optional)]
+    pub rows: Option<i32>,
+
     #[ts(optional)]
     pub completion_options: Option<Vec<GenericCompletionOption>>,
 }

package-lock.json

@@ -13,6 +13,7 @@
         "packages/plugin-runtime-types",
         "plugins-external/mcp-server",
         "plugins-external/template-function-faker",
+        "plugins-external/httpsnippet",
         "plugins/action-copy-curl",
         "plugins/action-copy-grpcurl",
         "plugins/action-send-folder",
@@ -2022,6 +2023,19 @@
         "node": ">=16.9"
       }
     },
+    "node_modules/@readme/httpsnippet": {
+      "version": "11.0.0",
+      "resolved": "https://registry.npmjs.org/@readme/httpsnippet/-/httpsnippet-11.0.0.tgz",
+      "integrity": "sha512-XSyaAsJkZfmMO9R4WDlVJARZgd4wlImftSkMkKclidniXA1h6DTya9iTqJenQo9mHQLh3u6kAC3CDRaIV+LbLw==",
+      "license": "MIT",
+      "dependencies": {
+        "qs": "^6.11.2",
+        "stringify-object": "^3.3.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/@replit/codemirror-emacs": {
       "version": "6.1.0",
       "resolved": "https://registry.npmjs.org/@replit/codemirror-emacs/-/codemirror-emacs-6.1.0.tgz",
@@ -4045,6 +4059,10 @@
       "resolved": "plugins/filter-xpath",
       "link": true
     },
+    "node_modules/@yaak/httpsnippet": {
+      "resolved": "plugins-external/httpsnippet",
+      "link": true
+    },
     "node_modules/@yaak/importer-curl": {
       "resolved": "plugins/importer-curl",
       "link": true
@@ -7411,6 +7429,12 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/get-own-enumerable-property-symbols": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/get-own-enumerable-property-symbols/-/get-own-enumerable-property-symbols-3.0.2.tgz",
+      "integrity": "sha512-I0UBV/XOz1XkIJHEUDMZAbzCThU/H8DxmSfmdGcKPnVhu2VfFqr34jr9777IyaTYvxjedWhqVIilEDsCdP5G6g==",
+      "license": "ISC"
+    },
     "node_modules/get-proto": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/get-proto/-/get-proto-1.0.1.tgz",
@@ -8529,6 +8553,15 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/is-obj": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/is-obj/-/is-obj-1.0.1.tgz",
+      "integrity": "sha512-l4RyHgRqGN4Y3+9JHVrNqO+tN0rV5My76uW5/nuO4K1b6vw5G8d/cmFjP9tRfEsdhZNt0IFdZuK/c2Vr4Nb+Qg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/is-plain-obj": {
       "version": "4.1.0",
       "resolved": "https://registry.npmjs.org/is-plain-obj/-/is-plain-obj-4.1.0.tgz",
@@ -13789,6 +13822,29 @@
         "url": "https://github.com/sponsors/wooorm"
       }
     },
+    "node_modules/stringify-object": {
+      "version": "3.3.0",
+      "resolved": "https://registry.npmjs.org/stringify-object/-/stringify-object-3.3.0.tgz",
+      "integrity": "sha512-rHqiFh1elqCQ9WPLIC8I0Q/g/wj5J1eMkyoiD6eoQApWHP0FtlK7rqnhmabL5VUY9JQCcqwwvlOaSuutekgyrw==",
+      "license": "BSD-2-Clause",
+      "dependencies": {
+        "get-own-enumerable-property-symbols": "^3.0.0",
+        "is-obj": "^1.0.1",
+        "is-regexp": "^1.0.0"
+      },
+      "engines": {
+        "node": ">=4"
+      }
+    },
+    "node_modules/stringify-object/node_modules/is-regexp": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/is-regexp/-/is-regexp-1.0.0.tgz",
+      "integrity": "sha512-7zjFAPO4/gwyQAAgRRmqeEeyIICSdmCqa3tsVHMdBzaXXRiqopZL4Cyghg/XulGWrtABTpbnYYzzIRffLkP4oA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/strip-ansi": {
       "version": "7.1.2",
       "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-7.1.2.tgz",
@@ -15788,6 +15844,34 @@
         "undici-types": "~7.16.0"
       }
     },
+    "plugins-external/httpsnippet": {
+      "name": "@yaak/httpsnippet",
+      "version": "1.0.0",
+      "dependencies": {
+        "@readme/httpsnippet": "^11.0.0"
+      },
+      "devDependencies": {
+        "@types/node": "^22.0.0",
+        "typescript": "^5.9.3"
+      }
+    },
+    "plugins-external/httpsnippet/node_modules/@types/node": {
+      "version": "22.19.9",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-22.19.9.tgz",
+      "integrity": "sha512-PD03/U8g1F9T9MI+1OBisaIARhSzeidsUjQaf51fOxrfjeiKN9bLVO06lHuHYjxdnqLWJijJHfqXPSJri2EM2A==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "undici-types": "~6.21.0"
+      }
+    },
+    "plugins-external/httpsnippet/node_modules/undici-types": {
+      "version": "6.21.0",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.21.0.tgz",
+      "integrity": "sha512-iwDZqg0QAGrg9Rav5H4n0M64c3mkR59cJ6wQp+7C4nI0gsmExaedaYLNO44eT4AtBBwjbTiGPMlt2Md0T9H9JQ==",
+      "dev": true,
+      "license": "MIT"
+    },
     "plugins-external/mcp-server": {
       "name": "@yaak/mcp-server",
       "version": "0.1.7",

package.json

@@ -12,6 +12,7 @@
     "packages/plugin-runtime-types",
     "plugins-external/mcp-server",
     "plugins-external/template-function-faker",
+    "plugins-external/httpsnippet",
     "plugins/action-copy-curl",
     "plugins/action-copy-grpcurl",
     "plugins/action-send-folder",

packages/plugin-runtime-types/src/bindings/gen_events.ts

@@ -172,7 +172,11 @@ hideGutter?: boolean,
 /**
  * Language for syntax highlighting
  */
-language?: EditorLanguage, readOnly?: boolean, completionOptions?: Array<GenericCompletionOption>, 
+language?: EditorLanguage, readOnly?: boolean, 
+/**
+ * Fixed number of visible rows
+ */
+rows?: number, completionOptions?: Array<GenericCompletionOption>, 
 /**
  * The name of the input. The value will be stored at this object attribute in the resulting data
  */
@@ -476,9 +480,11 @@ label: string, title?: string, size?: WindowSize, dataDirKey?: string, };
 
 export type PluginContext = { id: string, label: string | null, workspaceId: string | null, };
 
-export type PromptFormRequest = { id: string, title: string, description?: string, inputs: Array<FormInput>, confirmText?: string, cancelText?: string, };
+export type PromptFormRequest = { id: string, title: string, description?: string, inputs: Array<FormInput>, confirmText?: string, cancelText?: string, size?: PromptFormSize, };
 
-export type PromptFormResponse = { values: { [key in string]?: JsonPrimitive } | null, };
+export type PromptFormResponse = { values: { [key in string]?: JsonPrimitive } | null, done?: boolean, };
+
+export type PromptFormSize = "sm" | "md" | "lg" | "full" | "dynamic";
 
 export type PromptTextRequest = { id: string, title: string, label: string, description?: string, defaultValue?: string, placeholder?: string, 
 /**

packages/plugin-runtime-types/src/bindings/gen_models.ts

@@ -49,7 +49,7 @@ export type HttpResponseEvent = { model: "http_response_event", id: string, crea
  * This mirrors `yaak_http::sender::HttpResponseEvent` but with serde support.
  * The `From` impl is in yaak-http to avoid circular dependencies.
  */
-export type HttpResponseEventData = { "type": "setting", name: string, value: string, } | { "type": "info", message: string, } | { "type": "redirect", url: string, status: number, behavior: string, } | { "type": "send_url", method: string, path: string, } | { "type": "receive_url", version: string, status: string, } | { "type": "header_up", name: string, value: string, } | { "type": "header_down", name: string, value: string, } | { "type": "chunk_sent", bytes: number, } | { "type": "chunk_received", bytes: number, } | { "type": "dns_resolved", hostname: string, addresses: Array<string>, duration: bigint, overridden: boolean, };
+export type HttpResponseEventData = { "type": "setting", name: string, value: string, } | { "type": "info", message: string, } | { "type": "redirect", url: string, status: number, behavior: string, } | { "type": "send_url", method: string, scheme: string, username: string, password: string, host: string, port: number, path: string, query: string, fragment: string, } | { "type": "receive_url", version: string, status: string, } | { "type": "header_up", name: string, value: string, } | { "type": "header_down", name: string, value: string, } | { "type": "chunk_sent", bytes: number, } | { "type": "chunk_received", bytes: number, } | { "type": "dns_resolved", hostname: string, addresses: Array<string>, duration: bigint, overridden: boolean, };
 
 export type HttpResponseHeader = { name: string, value: string, };
 

packages/plugin-runtime-types/src/plugins/Context.ts

@@ -27,6 +27,11 @@ import type {
 } from '../bindings/gen_events.ts';
 import type { Folder, HttpRequest } from '../bindings/gen_models.ts';
 import type { JsonValue } from '../bindings/serde_json/JsonValue';
+import type { DynamicPromptFormArg } from './PromptFormPlugin';
+
+type DynamicPromptFormRequest = Omit<PromptFormRequest, 'inputs'> & {
+  inputs: DynamicPromptFormArg[];
+};
 
 export type WorkspaceHandle = Pick<WorkspaceInfo, 'id' | 'name'>;
 
@@ -39,7 +44,7 @@ export interface Context {
   };
   prompt: {
     text(args: PromptTextRequest): Promise<PromptTextResponse['value']>;
-    form(args: PromptFormRequest): Promise<PromptFormResponse['values']>;
+    form(args: DynamicPromptFormRequest): Promise<PromptFormResponse['values']>;
   };
   store: {
     set<T>(key: string, value: T): Promise<void>;

packages/plugin-runtime-types/src/plugins/PromptFormPlugin.ts

@@ -0,0 +1,31 @@
+import type { FormInput, JsonPrimitive } from '../bindings/gen_events';
+import type { MaybePromise } from '../helpers';
+import type { Context } from './Context';
+
+export type CallPromptFormDynamicArgs = {
+  values: { [key in string]?: JsonPrimitive };
+};
+
+type AddDynamicMethod<T> = {
+  dynamic?: (
+    ctx: Context,
+    args: CallPromptFormDynamicArgs,
+  ) => MaybePromise<Partial<T> | null | undefined>;
+};
+
+// biome-ignore lint/suspicious/noExplicitAny: distributive conditional type pattern
+type AddDynamic<T> = T extends any
+  ? T extends { inputs?: FormInput[] }
+    ? Omit<T, 'inputs'> & {
+        inputs: Array<AddDynamic<FormInput>>;
+        dynamic?: (
+          ctx: Context,
+          args: CallPromptFormDynamicArgs,
+        ) => MaybePromise<
+          Partial<Omit<T, 'inputs'> & { inputs: Array<AddDynamic<FormInput>> }> | null | undefined
+        >;
+      }
+    : T & AddDynamicMethod<T>
+  : never;
+
+export type DynamicPromptFormArg = AddDynamic<FormInput>;

packages/plugin-runtime-types/src/plugins/index.ts

@@ -2,21 +2,22 @@ import type { AuthenticationPlugin } from './AuthenticationPlugin';
 
 import type { Context } from './Context';
 import type { FilterPlugin } from './FilterPlugin';
+import type { FolderActionPlugin } from './FolderActionPlugin';
 import type { GrpcRequestActionPlugin } from './GrpcRequestActionPlugin';
 import type { HttpRequestActionPlugin } from './HttpRequestActionPlugin';
-import type { WebsocketRequestActionPlugin } from './WebsocketRequestActionPlugin';
-import type { WorkspaceActionPlugin } from './WorkspaceActionPlugin';
-import type { FolderActionPlugin } from './FolderActionPlugin';
 import type { ImporterPlugin } from './ImporterPlugin';
 import type { TemplateFunctionPlugin } from './TemplateFunctionPlugin';
 import type { ThemePlugin } from './ThemePlugin';
+import type { WebsocketRequestActionPlugin } from './WebsocketRequestActionPlugin';
+import type { WorkspaceActionPlugin } from './WorkspaceActionPlugin';
 
 export type { Context };
-export type { DynamicTemplateFunctionArg } from './TemplateFunctionPlugin';
 export type { DynamicAuthenticationArg } from './AuthenticationPlugin';
+export type { CallPromptFormDynamicArgs, DynamicPromptFormArg } from './PromptFormPlugin';
+export type { DynamicTemplateFunctionArg } from './TemplateFunctionPlugin';
 export type { TemplateFunctionPlugin };
-export type { WorkspaceActionPlugin } from './WorkspaceActionPlugin';
 export type { FolderActionPlugin } from './FolderActionPlugin';
+export type { WorkspaceActionPlugin } from './WorkspaceActionPlugin';
 
 /**
  * The global structure of a Yaak plugin

packages/plugin-runtime/src/PluginInstance.ts

@@ -1,7 +1,12 @@
 import console from 'node:console';
 import { type Stats, statSync, watch } from 'node:fs';
 import path from 'node:path';
-import type { Context, PluginDefinition } from '@yaakapp/api';
+import type {
+  CallPromptFormDynamicArgs,
+  Context,
+  DynamicPromptFormArg,
+  PluginDefinition,
+} from '@yaakapp/api';
 import {
   applyFormInputDefaults,
   validateTemplateFunctionArgs,
@@ -12,6 +17,7 @@ import type {
   DeleteModelResponse,
   FindHttpResponsesResponse,
   Folder,
+  FormInput,
   GetCookieValueRequest,
   GetCookieValueResponse,
   GetHttpRequestByIdResponse,
@@ -55,6 +61,7 @@ export class PluginInstance {
   #mod: PluginDefinition;
   #pluginToAppEvents: EventChannel;
   #appToPluginEvents: EventChannel;
+  #pendingDynamicForms = new Map<string, DynamicPromptFormArg[]>();
 
   constructor(workerData: PluginWorkerData, pluginEvents: EventChannel) {
     this.#workerData = workerData;
@@ -106,6 +113,7 @@ export class PluginInstance {
 
   async terminate() {
     await this.#mod?.dispose?.();
+    this.#pendingDynamicForms.clear();
     this.#unimportModule();
   }
 
@@ -664,10 +672,58 @@ export class PluginInstance {
           return reply.value;
         },
         form: async (args) => {
-          const reply: PromptFormResponse = await this.#sendForReply(context, {
+          // Strip dynamic callbacks before serializing (they can't cross the wire)
-            type: 'prompt_form_request',
+          const strippedInputs = stripDynamicCallbacks(args.inputs);
-            ...args,
+
+          // Build the event manually so we can get the event ID for keying
+          const eventToSend = this.#buildEventToSend(
+            context,
+            { type: 'prompt_form_request', ...args, inputs: strippedInputs },
+            null,
+          );
+
+          // Store original inputs (with dynamic callbacks) for later resolution
+          this.#pendingDynamicForms.set(eventToSend.id, args.inputs);
+
+          const reply = await new Promise<PromptFormResponse>((resolve) => {
+            const cb = (event: InternalEvent) => {
+              if (event.replyId !== eventToSend.id) return;
+
+              if (event.payload.type === 'prompt_form_response') {
+                const { done, values } = event.payload as PromptFormResponse;
+                if (done) {
+                  // Final response — resolve the promise and clean up
+                  this.#appToPluginEvents.unlisten(cb);
+                  this.#pendingDynamicForms.delete(eventToSend.id);
+                  resolve({ values } as PromptFormResponse);
+                } else {
+                  // Intermediate value change — resolve dynamic inputs and send back
+                  const storedInputs = this.#pendingDynamicForms.get(eventToSend.id);
+                  if (storedInputs && values) {
+                    const ctx = this.#newCtx(context);
+                    const callArgs: CallPromptFormDynamicArgs = { values };
+                    applyDynamicFormInput(ctx, storedInputs, callArgs)
+                      .then((resolvedInputs) => {
+                        const stripped = stripDynamicCallbacks(resolvedInputs);
+                        this.#sendPayload(
+                          context,
+                          { type: 'prompt_form_request', ...args, inputs: stripped },
+                          eventToSend.id,
+                        );
+                      })
+                      .catch((err) => {
+                        console.error('Failed to resolve dynamic form inputs', err);
+                      });
+                  }
+                }
+              }
+            };
+            this.#appToPluginEvents.listen(cb);
+
+            // Send the initial event after we start listening (to prevent race)
+            this.#sendEvent(eventToSend);
           });
+
           return reply.values;
         },
       },
@@ -906,6 +962,17 @@ export class PluginInstance {
   }
 }
 
+function stripDynamicCallbacks(inputs: DynamicPromptFormArg[]): FormInput[] {
+  return inputs.map((input) => {
+    // biome-ignore lint/suspicious/noExplicitAny: stripping dynamic from union type
+    const { dynamic, ...rest } = input as any;
+    if ('inputs' in rest && Array.isArray(rest.inputs)) {
+      rest.inputs = stripDynamicCallbacks(rest.inputs);
+    }
+    return rest as FormInput;
+  });
+}
+
 function genId(len = 5): string {
   const alphabet = '01234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
   let id = '';

packages/plugin-runtime/src/common.ts

@@ -1,9 +1,21 @@
-import type { Context, DynamicAuthenticationArg, DynamicTemplateFunctionArg } from '@yaakapp/api';
+import type {
+  CallPromptFormDynamicArgs,
+  Context,
+  DynamicAuthenticationArg,
+  DynamicPromptFormArg,
+  DynamicTemplateFunctionArg,
+} from '@yaakapp/api';
 import type {
   CallHttpAuthenticationActionArgs,
   CallTemplateFunctionArgs,
 } from '@yaakapp-internal/plugins';
 
+type AnyDynamicArg = DynamicTemplateFunctionArg | DynamicAuthenticationArg | DynamicPromptFormArg;
+type AnyCallArgs =
+  | CallTemplateFunctionArgs
+  | CallHttpAuthenticationActionArgs
+  | CallPromptFormDynamicArgs;
+
 export async function applyDynamicFormInput(
   ctx: Context,
   args: DynamicTemplateFunctionArg[],
@@ -18,30 +30,40 @@ export async function applyDynamicFormInput(
 
 export async function applyDynamicFormInput(
   ctx: Context,
-  args: (DynamicTemplateFunctionArg | DynamicAuthenticationArg)[],
+  args: DynamicPromptFormArg[],
-  callArgs: CallTemplateFunctionArgs | CallHttpAuthenticationActionArgs,
+  callArgs: CallPromptFormDynamicArgs,
-): Promise<(DynamicTemplateFunctionArg | DynamicAuthenticationArg)[]> {
+): Promise<DynamicPromptFormArg[]>;
-  const resolvedArgs: (DynamicTemplateFunctionArg | DynamicAuthenticationArg)[] = [];
+
+export async function applyDynamicFormInput(
+  ctx: Context,
+  args: AnyDynamicArg[],
+  callArgs: AnyCallArgs,
+): Promise<AnyDynamicArg[]> {
+  const resolvedArgs: AnyDynamicArg[] = [];
   for (const { dynamic, ...arg } of args) {
     const dynamicResult =
       typeof dynamic === 'function'
         ? await dynamic(
             ctx,
-            callArgs as CallTemplateFunctionArgs & CallHttpAuthenticationActionArgs,
+            callArgs as CallTemplateFunctionArgs &
+              CallHttpAuthenticationActionArgs &
+              CallPromptFormDynamicArgs,
           )
         : undefined;
 
     const newArg = {
       ...arg,
       ...dynamicResult,
-    } as DynamicTemplateFunctionArg | DynamicAuthenticationArg;
+    } as AnyDynamicArg;
 
     if ('inputs' in newArg && Array.isArray(newArg.inputs)) {
       try {
         newArg.inputs = await applyDynamicFormInput(
           ctx,
           newArg.inputs as DynamicTemplateFunctionArg[],
-          callArgs as CallTemplateFunctionArgs & CallHttpAuthenticationActionArgs,
+          callArgs as CallTemplateFunctionArgs &
+            CallHttpAuthenticationActionArgs &
+            CallPromptFormDynamicArgs,
         );
       } catch (e) {
         console.error('Failed to apply dynamic form input', e);

plugins-external/httpsnippet/package.json

@@ -0,0 +1,24 @@
+{
+  "name": "@yaak/httpsnippet",
+  "private": true,
+  "version": "1.0.0",
+  "displayName": "HTTP Snippet",
+  "description": "Generate code snippets for HTTP requests in various languages and frameworks",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/mountain-loop/yaak.git",
+    "directory": "plugins-external/httpsnippet"
+  },
+  "scripts": {
+    "build": "yaakcli build",
+    "dev": "yaakcli dev",
+    "test": "vitest --run tests"
+  },
+  "dependencies": {
+    "@readme/httpsnippet": "^11.0.0"
+  },
+  "devDependencies": {
+    "@types/node": "^22.0.0",
+    "typescript": "^5.9.3"
+  }
+}

plugins-external/httpsnippet/src/index.ts

@@ -0,0 +1,277 @@
+import { availableTargets, HTTPSnippet } from '@readme/httpsnippet';
+import type { HttpRequest, PluginDefinition } from '@yaakapp/api';
+
+// Get all available targets and build select options
+const targets = availableTargets();
+
+// Build language (target) options
+const languageOptions = targets.map((target) => ({
+  label: target.title,
+  value: target.key,
+}));
+
+// Get client options for a given target key
+function getClientOptions(targetKey: string) {
+  const target = targets.find((t) => t.key === targetKey);
+  if (!target) return [];
+  return target.clients.map((client) => ({
+    label: client.title,
+    value: client.key,
+  }));
+}
+
+// Get default client for a target
+function getDefaultClient(targetKey: string): string {
+  const target = targets.find((t) => t.key === targetKey);
+  return target?.clients[0]?.key ?? '';
+}
+
+// Defaults
+const defaultTarget = 'javascript';
+const defaultClient = 'fetch';
+
+// Map target key to editor language for syntax highlighting
+function getEditorLanguage(targetKey: string): 'javascript' | 'json' | 'text' {
+  if (['javascript', 'node'].includes(targetKey)) return 'javascript';
+  if (targetKey === 'json') return 'json';
+  return 'text';
+}
+
+// Convert Yaak HttpRequest to HAR format
+function toHarRequest(request: Partial<HttpRequest>) {
+  // Build URL with query parameters
+  let finalUrl = request.url || '';
+  const urlParams = (request.urlParameters ?? []).filter((p) => p.enabled !== false && !!p.name);
+  if (urlParams.length > 0) {
+    const [base, hash] = finalUrl.split('#');
+    const separator = base?.includes('?') ? '&' : '?';
+    const queryString = urlParams
+      .map((p) => `${encodeURIComponent(p.name)}=${encodeURIComponent(p.value)}`)
+      .join('&');
+    finalUrl = base + separator + queryString + (hash ? `#${hash}` : '');
+  }
+
+  // Build headers array
+  const headers: Array<{ name: string; value: string }> = (request.headers ?? [])
+    .filter((h) => h.enabled !== false && !!h.name)
+    .map((h) => ({ name: h.name, value: h.value }));
+
+  // Handle authentication
+  if (request.authentication?.disabled !== true) {
+    if (request.authenticationType === 'basic') {
+      const credentials = btoa(
+        `${request.authentication?.username ?? ''}:${request.authentication?.password ?? ''}`,
+      );
+      headers.push({ name: 'Authorization', value: `Basic ${credentials}` });
+    } else if (request.authenticationType === 'bearer') {
+      const prefix = request.authentication?.prefix ?? 'Bearer';
+      const token = request.authentication?.token ?? '';
+      headers.push({ name: 'Authorization', value: `${prefix} ${token}`.trim() });
+    } else if (request.authenticationType === 'apikey') {
+      if (request.authentication?.location === 'header') {
+        headers.push({
+          name: request.authentication?.key ?? 'X-Api-Key',
+          value: request.authentication?.value ?? '',
+        });
+      } else if (request.authentication?.location === 'query') {
+        const sep = finalUrl.includes('?') ? '&' : '?';
+        finalUrl = [
+          finalUrl,
+          sep,
+          encodeURIComponent(request.authentication?.key ?? 'token'),
+          '=',
+          encodeURIComponent(request.authentication?.value ?? ''),
+        ].join('');
+      }
+    }
+  }
+
+  // Build HAR request object
+  const har: Record<string, unknown> = {
+    method: request.method || 'GET',
+    url: finalUrl,
+    headers,
+  };
+
+  // Handle request body
+  const bodyType = request.bodyType ?? 'none';
+  if (bodyType !== 'none' && request.body) {
+    if (bodyType === 'application/x-www-form-urlencoded' && Array.isArray(request.body.form)) {
+      const params = request.body.form
+        .filter((p: { enabled?: boolean; name?: string }) => p.enabled !== false && !!p.name)
+        .map((p: { name: string; value: string }) => ({ name: p.name, value: p.value }));
+      har.postData = {
+        mimeType: 'application/x-www-form-urlencoded',
+        params,
+      };
+    } else if (bodyType === 'multipart/form-data' && Array.isArray(request.body.form)) {
+      const params = request.body.form
+        .filter((p: { enabled?: boolean; name?: string }) => p.enabled !== false && !!p.name)
+        .map((p: { name: string; value: string; file?: string; contentType?: string }) => {
+          const param: Record<string, string> = { name: p.name, value: p.value || '' };
+          if (p.file) param.fileName = p.file;
+          if (p.contentType) param.contentType = p.contentType;
+          return param;
+        });
+      har.postData = {
+        mimeType: 'multipart/form-data',
+        params,
+      };
+    } else if (bodyType === 'graphql' && typeof request.body.query === 'string') {
+      const body = {
+        query: request.body.query || '',
+        variables: maybeParseJSON(request.body.variables, undefined),
+      };
+      har.postData = {
+        mimeType: 'application/json',
+        text: JSON.stringify(body),
+      };
+    } else if (typeof request.body.text === 'string') {
+      har.postData = {
+        mimeType: bodyType,
+        text: request.body.text,
+      };
+    }
+  }
+
+  return har;
+}
+
+function maybeParseJSON<T>(v: unknown, fallback: T): T | unknown {
+  if (typeof v !== 'string') return fallback;
+  try {
+    return JSON.parse(v);
+  } catch {
+    return fallback;
+  }
+}
+
+export const plugin: PluginDefinition = {
+  httpRequestActions: [
+    {
+      label: 'Generate Code Snippet',
+      icon: 'copy',
+      async onSelect(ctx, args) {
+        // Render the request with variables resolved
+        const renderedRequest = await ctx.httpRequest.render({
+          httpRequest: args.httpRequest,
+          purpose: 'send',
+        });
+
+        // Convert to HAR format
+        const harRequest = toHarRequest(renderedRequest);
+
+        // Get previously selected language or use defaults
+        const storedTarget = await ctx.store.get<string>('selectedTarget');
+        const storedClient = await ctx.store.get<string>('selectedClient');
+        const initialTarget = storedTarget || defaultTarget;
+        const initialClient = storedClient || defaultClient;
+
+        // Create snippet generator
+        const snippet = new HTTPSnippet(harRequest);
+
+        // Generate initial code preview
+        let initialCode = '';
+        try {
+          const result = snippet.convert(initialTarget as any, initialClient);
+          initialCode = Array.isArray(result) ? result.join('\n') : result || '';
+        } catch {
+          initialCode = '// Error generating snippet';
+        }
+
+        // Show dialog with language/library selectors and code preview
+        const result = await ctx.prompt.form({
+          id: 'httpsnippet',
+          title: 'Generate Code Snippet',
+          confirmText: 'Copy to Clipboard',
+          cancelText: 'Cancel',
+          size: 'md',
+          inputs: [
+            {
+              type: 'h_stack',
+              inputs: [
+                {
+                  type: 'select',
+                  name: 'target',
+                  label: 'Language',
+                  defaultValue: initialTarget,
+                  options: languageOptions,
+                },
+                {
+                  type: 'select',
+                  name: `client-${initialTarget}`,
+                  label: 'Library',
+                  defaultValue: initialClient,
+                  options: getClientOptions(initialTarget),
+                  dynamic(_ctx, { values }) {
+                    const targetKey = String(values.target || defaultTarget);
+                    const options = getClientOptions(targetKey);
+                    return {
+                      name: `client-${targetKey}`,
+                      options,
+                      defaultValue: options[0]?.value ?? '',
+                    };
+                  },
+                },
+              ],
+            },
+            {
+              type: 'editor',
+              name: 'code',
+              label: 'Preview',
+              language: getEditorLanguage(initialTarget),
+              defaultValue: initialCode,
+              readOnly: true,
+              rows: 15,
+              dynamic(_ctx, { values }) {
+                const targetKey = String(values.target || defaultTarget);
+                const clientKey = String(
+                  values[`client-${targetKey}`] || getDefaultClient(targetKey),
+                );
+                let code: string;
+                try {
+                  const result = snippet.convert(targetKey as any, clientKey);
+                  code = Array.isArray(result) ? result.join('\n') : result || '';
+                } catch {
+                  code = '// Error generating snippet';
+                }
+                return {
+                  defaultValue: code,
+                  language: getEditorLanguage(targetKey),
+                };
+              },
+            },
+          ],
+        });
+
+        if (result) {
+          // Store the selected language and library for next time
+          const selectedTarget = String(result.target || initialTarget);
+          const selectedClient = String(
+            result[`client-${selectedTarget}`] || getDefaultClient(selectedTarget),
+          );
+          await ctx.store.set('selectedTarget', selectedTarget);
+          await ctx.store.set('selectedClient', selectedClient);
+
+          // Generate snippet for the selected language
+          try {
+            const code = snippet.convert(selectedTarget as any, selectedClient);
+            const codeText = Array.isArray(code) ? code.join('\n') : code || '';
+            await ctx.clipboard.copyText(codeText);
+            await ctx.toast.show({
+              message: 'Code snippet copied to clipboard',
+              icon: 'copy',
+              color: 'success',
+            });
+          } catch (err) {
+            await ctx.toast.show({
+              message: `Failed to generate snippet: ${err}`,
+              icon: 'alert_triangle',
+              color: 'danger',
+            });
+          }
+        }
+      },
+    },
+  ],
+};

src-web/components/DynamicForm.tsx

@@ -360,8 +360,9 @@ function EditorArg({
         className={classNames(
           'border border-border rounded-md overflow-hidden px-2 py-1',
           'focus-within:border-border-focus',
-          'max-h-[10rem]', // So it doesn't take up too much space
+          !arg.rows && 'max-h-[10rem]', // So it doesn't take up too much space
         )}
+        style={arg.rows ? { height: `${arg.rows * 1.4 + 0.75}rem` } : undefined}
       >
         <Editor
           id={id}

src-web/components/core/Prompt.tsx

@@ -1,6 +1,6 @@
 import type { FormInput, JsonPrimitive } from '@yaakapp-internal/plugins';
 import type { FormEvent } from 'react';
-import { useCallback, useRef, useState } from 'react';
+import { useCallback, useEffect, useRef, useState } from 'react';
 import { generateId } from '../../lib/generateId';
 import { DynamicForm } from '../DynamicForm';
 import { Button } from './Button';
@@ -12,16 +12,21 @@ export interface PromptProps {
   onResult: (value: Record<string, JsonPrimitive> | null) => void;
   confirmText?: string;
   cancelText?: string;
+  onValuesChange?: (values: Record<string, JsonPrimitive>) => void;
+  onInputsUpdated?: (cb: (inputs: FormInput[]) => void) => void;
 }
 
 export function Prompt({
   onCancel,
-  inputs,
+  inputs: initialInputs,
   onResult,
   confirmText = 'Confirm',
   cancelText = 'Cancel',
+  onValuesChange,
+  onInputsUpdated,
 }: PromptProps) {
   const [value, setValue] = useState<Record<string, JsonPrimitive>>({});
+  const [inputs, setInputs] = useState<FormInput[]>(initialInputs);
   const handleSubmit = useCallback(
     (e: FormEvent<HTMLFormElement>) => {
       e.preventDefault();
@@ -30,6 +35,16 @@ export function Prompt({
     [onResult, value],
   );
 
+  // Register callback for external input updates (from plugin dynamic resolution)
+  useEffect(() => {
+    onInputsUpdated?.(setInputs);
+  }, [onInputsUpdated]);
+
+  // Notify of value changes for dynamic resolution
+  useEffect(() => {
+    onValuesChange?.(value);
+  }, [value, onValuesChange]);
+
   const id = `prompt.form.${useRef(generateId()).current}`;
 
   return (

src-web/lib/initGlobalListeners.tsx

@@ -1,6 +1,12 @@
 import { emit } from '@tauri-apps/api/event';
 import { openUrl } from '@tauri-apps/plugin-opener';
-import type { InternalEvent, ShowToastRequest } from '@yaakapp-internal/plugins';
+import { debounce } from '@yaakapp-internal/lib';
+import type {
+  FormInput,
+  InternalEvent,
+  JsonPrimitive,
+  ShowToastRequest,
+} from '@yaakapp-internal/plugins';
 import { updateAllPlugins } from '@yaakapp-internal/plugins';
 import type {
   PluginUpdateNotification,
@@ -32,6 +38,9 @@ export function initGlobalListeners() {
 
   listenToTauriEvent('settings', () => openSettings.mutate(null));
 
+  // Track active dynamic form dialogs so follow-up input updates can reach them
+  const activeForms = new Map<string, (inputs: FormInput[]) => void>();
+
   // Listen for plugin events
   listenToTauriEvent<InternalEvent>('plugin_event', async ({ payload: event }) => {
     if (event.payload.type === 'prompt_text_request') {
@@ -49,26 +58,47 @@ export function initGlobalListeners() {
       };
       await emit(event.id, result);
     } else if (event.payload.type === 'prompt_form_request') {
+      if (event.replyId != null) {
+        // Follow-up update from plugin runtime — update the active dialog's inputs
+        const updateInputs = activeForms.get(event.replyId);
+        if (updateInputs) {
+          updateInputs(event.payload.inputs);
+        }
+        return;
+      }
+
+      // Initial request — show the dialog with bidirectional support
+      const emitFormResponse = (values: Record<string, JsonPrimitive> | null, done: boolean) => {
+        const result: InternalEvent = {
+          id: generateId(),
+          replyId: event.id,
+          pluginName: event.pluginName,
+          pluginRefId: event.pluginRefId,
+          context: event.context,
+          payload: {
+            type: 'prompt_form_response',
+            values,
+            done,
+          },
+        };
+        emit(event.id, result);
+      };
+
       const values = await showPromptForm({
         id: event.payload.id,
         title: event.payload.title,
         description: event.payload.description,
+        size: event.payload.size,
         inputs: event.payload.inputs,
         confirmText: event.payload.confirmText,
         cancelText: event.payload.cancelText,
+        onValuesChange: debounce((values) => emitFormResponse(values, false), 150),
+        onInputsUpdated: (cb) => activeForms.set(event.id, cb),
       });
-      const result: InternalEvent = {
+
-        id: generateId(),
+      // Clean up and send final response
-        replyId: event.id,
+      activeForms.delete(event.id);
-        pluginName: event.pluginName,
+      emitFormResponse(values, true);
-        pluginRefId: event.pluginRefId,
-        context: event.context,
-        payload: {
-          type: 'prompt_form_response',
-          values,
-        },
-      };
-      await emit(event.id, result);
     }
   });
 

src-web/lib/prompt-form.tsx

@@ -1,21 +1,32 @@
+import type { FormInput, JsonPrimitive } from '@yaakapp-internal/plugins';
 import type { DialogProps } from '../components/core/Dialog';
 import type { PromptProps } from '../components/core/Prompt';
 import { Prompt } from '../components/core/Prompt';
 import { showDialog } from './dialog';
 
-type FormArgs = Pick<DialogProps, 'title' | 'description'> &
+type FormArgs = Pick<DialogProps, 'title' | 'description' | 'size'> &
   Omit<PromptProps, 'onClose' | 'onCancel' | 'onResult'> & {
     id: string;
+    onValuesChange?: (values: Record<string, JsonPrimitive>) => void;
+    onInputsUpdated?: (cb: (inputs: FormInput[]) => void) => void;
   };
 
-export async function showPromptForm({ id, title, description, ...props }: FormArgs) {
+export async function showPromptForm({
+  id,
+  title,
+  description,
+  size,
+  onValuesChange,
+  onInputsUpdated,
+  ...props
+}: FormArgs) {
   return new Promise((resolve: PromptProps['onResult']) => {
     showDialog({
       id,
       title,
       description,
       hideX: true,
-      size: 'sm',
+      size: size ?? 'sm',
       disableBackdropClose: true, // Prevent accidental dismisses
       onClose: () => {
         // Click backdrop, close, or escape
@@ -32,6 +43,8 @@ export async function showPromptForm({ id, title, description, ...props }: FormA
             resolve(v);
             hide();
           },
+          onValuesChange,
+          onInputsUpdated,
           ...props,
         }),
     });