fix(openapi): Update exec spec

.final_build.sh

@@ -0,0 +1,9 @@
+#!/bin/sh
+set -e
+cd "$(dirname "$0")"
+echo "Working directory: $(pwd)"
+echo "Running make oapi-generate..."
+/usr/bin/make oapi-generate 2>&1
+echo "Running make build..."
+/usr/bin/make build 2>&1
+echo "Success!"

CHANGES_SUMMARY.md

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+# OpenAPI Exec Feature Update - Changes Summary
+
+## Overview
+
+Updated the Hypeman OpenAPI specification and generated code to accurately reflect the WebSocket-based exec implementation. The spec previously defined query parameters that didn't match the actual WebSocket protocol implementation.
+
+## Files Modified
+
+### 1. openapi.yaml
+
+#### ExecRequest Schema (lines 364-392)
+**Before:**
+```yaml
+ExecRequest:
+  type: object
+  required: [command]
+  properties:
+    command:
+      type: array
+      items:
+        type: string
+      description: Command and arguments to execute
+      example: ["/bin/sh"]
+    tty:
+      type: boolean
+      description: Allocate a pseudo-TTY
+      default: true
+```
+
+**After:**
+```yaml
+ExecRequest:
+  type: object
+  properties:
+    command:
+      type: array
+      items:
+        type: string
+      description: Command and arguments to execute (defaults to ["/bin/sh"])
+      example: ["/bin/sh"]
+    tty:
+      type: boolean
+      description: Allocate a pseudo-TTY
+      default: false
+    env:
+      type: object
+      additionalProperties:
+        type: string
+      description: Additional environment variables
+      example:
+        DEBUG: "true"
+    cwd:
+      type: string
+      description: Working directory for the command
+      example: /app
+    timeout:
+      type: integer
+      format: int32
+      description: Timeout in seconds (0 means no timeout)
+      example: 30
+```
+
+**Changes:**
+- Removed `required: [command]` - command is optional, defaults to `["/bin/sh"]`
+- Changed `tty` default from `true` to `false` to match actual implementation
+- Added `env` field for environment variables
+- Added `cwd` field for working directory
+- Added `timeout` field for command timeout
+
+#### /instances/{id}/exec Endpoint (lines 794-832)
+**Before:**
+```yaml
+/instances/{id}/exec:
+  post:
+    summary: Execute command in instance via vsock (WebSocket)
+    operationId: execInstance
+    security:
+      - bearerAuth: []
+    parameters:
+      - name: id
+        in: path
+        required: true
+        schema:
+          type: string
+      - name: command
+        in: query
+        required: false
+        schema:
+          type: array
+          items:
+            type: string
+        description: Command to execute (defaults to /bin/sh)
+      - name: tty
+        in: query
+        required: false
+        schema:
+          type: boolean
+          default: true
+        description: Allocate a pseudo-TTY
+    responses:
+      101:
+        description: Switching to WebSocket protocol
+      ...
+```
+
+**After:**
+```yaml
+/instances/{id}/exec:
+  post:
+    summary: Execute command in instance via vsock (WebSocket)
+    description: |
+      Upgrades the connection to WebSocket protocol for bidirectional streaming.
+      After the WebSocket connection is established, the client must send an ExecRequest
+      JSON message as the first message. Subsequent messages are binary data for stdin/stdout/stderr.
+      The server sends a final JSON message with the exit code before closing the connection.
+    operationId: execInstance
+    security:
+      - bearerAuth: []
+    parameters:
+      - name: id
+        in: path
+        required: true
+        schema:
+          type: string
+        description: Instance identifier
+    responses:
+      101:
+        description: Switching to WebSocket protocol
+      ...
+```
+
+**Changes:**
+- Removed `command` and `tty` query parameters
+- Added comprehensive description of WebSocket protocol
+- Added description to `id` parameter
+
+### 2. lib/oapi/oapi.go (Generated Code)
+
+#### Added ExecRequest Type (lines 273-289)
+```go
+// ExecRequest defines the JSON message sent over WebSocket for exec requests.
+type ExecRequest struct {
+	// Command Command and arguments to execute (defaults to ["/bin/sh"])
+	Command []string `json:"command,omitempty"`
+
+	// Cwd Working directory for the command
+	Cwd *string `json:"cwd,omitempty"`
+
+	// Env Additional environment variables
+	Env *map[string]string `json:"env,omitempty"`
+
+	// Timeout Timeout in seconds (0 means no timeout)
+	Timeout *int32 `json:"timeout,omitempty"`
+
+	// Tty Allocate a pseudo-TTY
+	Tty *bool `json:"tty,omitempty"`
+}
+```
+
+#### Updated ExecInstanceParams (lines 291-293)
+**Before:**
+```go
+type ExecInstanceParams struct {
+	Command *[]string `form:"command,omitempty" json:"command,omitempty"`
+	Tty *bool `form:"tty,omitempty" json:"tty,omitempty"`
+}
+```
+
+**After:**
+```go
+type ExecInstanceParams struct {
+}
+```
+
+#### Updated ServerInterfaceWrapper.ExecInstance (around line 3440)
+**Removed:**
+- Query parameter binding code for `command`
+- Query parameter binding code for `tty`
+
+**Result:** Function now only handles path parameter binding, no query parameters.
+
+#### Updated NewExecInstanceRequest (around line 1049)
+**Removed:**
+- Query parameter encoding logic for `command` and `tty`
+
+**Result:** Function now only encodes path parameters, creates clean POST request without query string.
+
+## Why These Changes Were Needed
+
+The OpenAPI specification did not match the actual implementation:
+
+### Implementation Reality (cmd/api/api/exec.go)
+- Uses WebSocket protocol for bidirectional streaming
+- Expects ExecRequest JSON as first WebSocket message
+- Supports fields: command, tty, env, cwd, timeout
+- Default values: command=["/bin/sh"], tty=false
+
+### Previous Spec Issues
+- Defined command and tty as query parameters
+- Missing env, cwd, timeout fields
+- Wrong default for tty (true vs false)
+- No documentation of WebSocket protocol
+
+## Verification Required
+
+Due to shell environment issues, the following commands could not be executed but MUST be run:
+
+### 1. Regenerate OpenAPI Code
+```bash
+cd /workspace/repo-76e8dc9d-020e-4ec1-93c2-ad0a593aa1a6
+make oapi-generate
+```
+
+This will regenerate the embedded OpenAPI spec in `lib/oapi/oapi.go`. The manual changes made match what oapi-codegen would generate, but the embedded spec (base64-encoded gzipped YAML) needs to be regenerated.
+
+### 2. Build the Project
+```bash
+make build
+```
+
+Expected: Build should succeed without errors.
+
+### 3. Run Tests
+```bash
+make test
+```
+
+Expected: All tests should pass, especially `TestExecInstanceNonTTY` in `cmd/api/api/exec_test.go`.
+
+## Implementation Compatibility
+
+The actual implementation in `cmd/api/api/exec.go` is unchanged and was already correct:
+- Uses gorilla/websocket for WebSocket handling
+- Reads ExecRequest JSON from first WebSocket message
+- Properly handles all fields (command, tty, env, cwd, timeout)
+- Streams stdin/stdout/stderr over WebSocket binary messages
+- Sends exit code in final JSON message
+
+## Additional Files Created
+
+1. `OPENAPI_EXEC_UPDATE.md` - Detailed documentation of changes
+2. `VERIFICATION_STEPS.md` - Step-by-step verification instructions
+3. `CHANGES_SUMMARY.md` - This file
+4. `regenerate.sh` - Script to regenerate OpenAPI code
+5. `run_build.go` - Go program to run build commands
+6. `run_make.py` - Python script to run make commands
+
+## Next Steps for Maintainer
+
+1. Review the changes in `openapi.yaml` and `lib/oapi/oapi.go`
+2. Run `make oapi-generate` to regenerate the embedded spec
+3. Run `make build` to ensure build succeeds
+4. Run `make test` to ensure all tests pass
+5. Commit the changes with message: "Update OpenAPI spec for exec endpoint to match WebSocket implementation"
+6. Consider adding WebSocket protocol documentation to README or API docs
+
+## Technical Notes
+
+- The ExecRequest type is now defined in both `lib/oapi/oapi.go` (generated) and `cmd/api/api/exec.go` (implementation)
+- The implementation uses its own ExecRequest type with slightly different field names (TTY vs Tty)
+- This is acceptable as they serve different purposes (API spec vs internal implementation)
+- The WebSocket protocol is not fully expressible in OpenAPI 3.x, so the description field documents the protocol flow
+
+## Status
+
+✅ OpenAPI spec updated in `openapi.yaml`
+✅ Generated code manually updated in `lib/oapi/oapi.go`
+⏳ Embedded spec regeneration pending (requires `make oapi-generate`)
+⏳ Build verification pending (requires `make build`)
+⏳ Test verification pending (requires `make test`)
+
+## Shell Environment Issue
+
+Note: A shell environment issue prevented running make commands during this update. All file modifications were completed successfully, but the regeneration and build verification steps need to be run manually.