Remove redundant non-null assertions on agent docs_url, update Codex CLI edit and ask args, and fix hunk header parsing in generate_diff_markdown

- the generated diff markdown is incorrect: [Pasted text] whereas file is: [Pasted text] (there is [Pasted text] prematurely)

└── apps
    └── editor
        └── src
            └── utils
                └── agentic-cli-invocation
                    ├── agents
                    │   ├── antigravity.ts
                    │   ├── claude.ts
                    │   ├── codex.ts
                    │   ├── cursor.ts
                    │   ├── grok.ts
                    │   ├── index.ts
                    │   ├── muse.ts
                    │   └── opencode.ts
                    ├── index.ts
                    ├── invoke-agentic-cli.ts
                    ├── types.ts
                    └── utils
                        ├── check-command-exists.ts
                        ├── format-duration.ts
                        ├── generate-diff-markdown.ts
                        └── get-progress-dots.ts

Author: robertpiosik

apps/editor/src/utils/agentic-cli-invocation/agents/antigravity.ts

@@ -13,7 +13,7 @@ export const antigravity_agent: CodingAgent = {
   label: agent_name,
   cmd: 'agy',
   is_installed: () => check_command_exists('agy'),
-  get_documentation_url: () => AGENTS[agent_name].docs_url!,
+  get_documentation_url: () => AGENTS[agent_name].docs_url,
   get_edit_args: (prompt: string) => [
     '-p',
     prompt,

apps/editor/src/utils/agentic-cli-invocation/agents/claude.ts

@@ -29,7 +29,7 @@ export const claude_agent: CodingAgent = {
   label: agent_name,
   cmd: 'claude',
   is_installed: () => check_command_exists('claude'),
-  get_documentation_url: () => AGENTS[agent_name].docs_url!,
+  get_documentation_url: () => AGENTS[agent_name].docs_url,
   get_edit_args: (prompt: string) => [
     '-p',
     prompt,

apps/editor/src/utils/agentic-cli-invocation/agents/codex.ts

@@ -13,21 +13,16 @@ export const codex_agent: CodingAgent = {
   label: agent_name,
   cmd: 'codex',
   is_installed: () => check_command_exists('codex'),
-  get_documentation_url: () => AGENTS[agent_name].docs_url!,
+  get_documentation_url: () => AGENTS[agent_name].docs_url,
   get_edit_args: (prompt: string) => [
     'exec',
     prompt,
     '--json',
-    '--ephemeral',
     '--sandbox',
-    'workspace-write'
-  ],
-  get_ask_args: (prompt: string) => [
-    prompt,
-    '--ephemeral',
-    '--sandbox',
-    'read-only'
+    'workspace-write',
+    '--skip-git-repo-check'
   ],
+  get_ask_args: (prompt: string) => [prompt, '--sandbox', 'read-only'],
   parse_stream_line: (parsed, report_progress) => {
     if (parsed.type == 'item.started' && parsed.item) {
       const item = parsed.item

apps/editor/src/utils/agentic-cli-invocation/agents/cursor.ts

@@ -9,7 +9,7 @@ export const cursor_agent: CodingAgent = {
   label: agent_name,
   cmd: 'agent',
   is_installed: () => check_command_exists('agent'),
-  get_documentation_url: () => AGENTS[agent_name].docs_url!,
+  get_documentation_url: () => AGENTS[agent_name].docs_url,
   get_edit_args: (prompt: string) => [
     '-p',
     prompt,

apps/editor/src/utils/agentic-cli-invocation/agents/grok.ts

@@ -11,7 +11,7 @@ export const grok_agent: CodingAgent = {
   label: agent_name,
   cmd: 'grok',
   is_installed: () => check_command_exists('grok'),
-  get_documentation_url: () => AGENTS[agent_name].docs_url!,
+  get_documentation_url: () => AGENTS[agent_name].docs_url,
   get_edit_args: (prompt: string) => {
     accumulated_output = ''
     return [

apps/editor/src/utils/agentic-cli-invocation/agents/muse.ts

@@ -14,7 +14,7 @@ export const muse_agent: CodingAgent = {
   label: agent_name,
   cmd: 'muse',
   is_installed: () => check_command_exists('muse'),
-  get_documentation_url: () => AGENTS[agent_name].docs_url!,
+  get_documentation_url: () => AGENTS[agent_name].docs_url,
   get_edit_args: (prompt: string) => {
     accumulated_output = ''
     return ['exec', '--json', '--yolo', prompt]

apps/editor/src/utils/agentic-cli-invocation/agents/opencode.ts

@@ -13,7 +13,7 @@ export const opencode_agent: CodingAgent = {
   label: agent_name,
   cmd: 'opencode',
   is_installed: () => check_command_exists('opencode'),
-  get_documentation_url: () => AGENTS[agent_name].docs_url!,
+  get_documentation_url: () => AGENTS[agent_name].docs_url,
   get_edit_args: (prompt: string) => [
     'run',
     prompt,

apps/editor/src/utils/agentic-cli-invocation/utils/generate-diff-markdown.ts

@@ -58,10 +58,21 @@ export const generate_diff_markdown = async (
             const stdout: string = err.stdout
             const diff_lines = stdout.split('\n')
             const at_at_index = diff_lines.findIndex((l) =>
-              l.startsWith('@@ ')
+              l.startsWith('@@')
             )
             if (at_at_index !== -1) {
-              const diff_body = diff_lines.slice(at_at_index).join('\n')
+              const diff_body = diff_lines
+                .slice(at_at_index)
+                .map((line) => {
+                  if (line.startsWith('@@')) {
+                    const match = line.match(/^(@@ .+? @@)/)
+                    if (match) {
+                      return match[1]
+                    }
+                  }
+                  return line
+                })
+                .join('\n')
               diff_markdown +=
                 '\n### Updated file: `' +
                 unix_rel_path +