feat: add Trae IDE support as a new agent (#1817)

* feat: add Trae IDE support as a new agent

Add Trae (https://www.trae.ai/) as a supported AI agent in spec-kit.
Trae is an IDE-based agent that uses .trae/rules/ directory for
project-level rules in Markdown format.

Changes across 9 files:
- src/specify_cli/__init__.py: Add trae to AGENT_CONFIG (IDE-based,
  .trae/ folder, rules subdir, no CLI required)
- src/specify_cli/extensions.py: Add trae to CommandRegistrar.AGENT_CONFIGS
  (.trae/rules, markdown format, .md extension)
- README.md: Add Trae to supported agents table, CLI examples, and
  --ai option description
- .github/workflows/scripts/create-release-packages.sh: Add trae to
  ALL_AGENTS array and build case statement
- .github/workflows/scripts/create-release-packages.ps1: Add trae to
  AllAgents array and switch statement
- .github/workflows/scripts/create-github-release.sh: Add trae template
  zip files to release assets
- scripts/bash/update-agent-context.sh: Add TRAE_FILE, trae case in
  update function, and auto-detect block
- scripts/powershell/update-agent-context.ps1: Add TRAE_FILE, ValidateSet
  entry, switch case, and auto-detect block
- tests/test_agent_config_consistency.py: Add 8 consistency tests for
  trae following established kimi/tabnine patterns

* fix: correct Generate-Commands parameter names for trae in PowerShell release script

Fix incorrect parameter names in the trae case of Build-Variant:
- -Format -> -Extension
- -ArgsToken -> -ArgFormat
- -OutDir -> -OutputDir

These now match the Generate-Commands function signature and all other
agent entries in the script.

Co-authored-by: Copilot <copilot@github.com>

* Update release packaging scripts and agent docs

* Update Agent.md

* Restore format

* Adjust order

* Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

* Unused

* fix: add TRAE_FILE to update_all_existing_agents() for auto-detect support

Add missing update_if_new call for TRAE_FILE in the bash
update-agent-context.sh script's update_all_existing_agents()
function, matching the PowerShell implementation.

This ensures running the script without arguments will correctly
auto-detect and update existing Trae agent files.

* Add configuration for 'trae' in agents.py

* Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

* Refactor trae configuration test for clarity

* Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

* Update update-agent-context.sh

* Fix formatting in update-agent-context.sh

---------

Co-authored-by: root <root@g340-cd52-700-60f9-5561-211-6c32.byted.org>
Co-authored-by: root <root@g340-cd52-700-c3d1-c735-796-4b9e.byted.org>
Co-authored-by: Copilot <copilot@github.com>
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

tests/test_agent_config_consistency.py

@@ -233,3 +233,79 @@ class TestAgentConfigConsistency:
     def test_ai_help_includes_kimi(self):
         """CLI help text for --ai should include kimi."""
         assert "kimi" in AI_ASSISTANT_HELP
+
+    # --- Trae IDE consistency checks ---
+
+    def test_trae_in_agent_config(self):
+        """AGENT_CONFIG should include trae with correct folder and commands_subdir."""
+        assert "trae" in AGENT_CONFIG
+        assert AGENT_CONFIG["trae"]["folder"] == ".trae/"
+        assert AGENT_CONFIG["trae"]["commands_subdir"] == "rules"
+        assert AGENT_CONFIG["trae"]["requires_cli"] is False
+        assert AGENT_CONFIG["trae"]["install_url"] is None
+
+    def test_trae_in_extension_registrar(self):
+        """Extension command registrar should include trae using .trae/rules and markdown, if present."""
+        cfg = CommandRegistrar.AGENT_CONFIGS
+
+        assert "trae" in cfg
+        trae_cfg = cfg["trae"]
+        assert trae_cfg["format"] == "markdown"
+        assert trae_cfg["args"] == "$ARGUMENTS"
+        assert trae_cfg["extension"] == ".md"
+
+    def test_trae_in_release_agent_lists(self):
+        """Bash and PowerShell release scripts should include trae in agent lists."""
+        sh_text = (REPO_ROOT / ".github" / "workflows" / "scripts" / "create-release-packages.sh").read_text(encoding="utf-8")
+        ps_text = (REPO_ROOT / ".github" / "workflows" / "scripts" / "create-release-packages.ps1").read_text(encoding="utf-8")
+
+        sh_match = re.search(r"ALL_AGENTS=\(([^)]*)\)", sh_text)
+        assert sh_match is not None
+        sh_agents = sh_match.group(1).split()
+
+        ps_match = re.search(r"\$AllAgents = @\(([^)]*)\)", ps_text)
+        assert ps_match is not None
+        ps_agents = re.findall(r"'([^']+)'", ps_match.group(1))
+
+        assert "trae" in sh_agents
+        assert "trae" in ps_agents
+
+    def test_trae_in_release_scripts_generate_commands(self):
+        """Release scripts should generate markdown commands for trae in .trae/rules."""
+        sh_text = (REPO_ROOT / ".github" / "workflows" / "scripts" / "create-release-packages.sh").read_text(encoding="utf-8")
+        ps_text = (REPO_ROOT / ".github" / "workflows" / "scripts" / "create-release-packages.ps1").read_text(encoding="utf-8")
+
+        assert ".trae/rules" in sh_text
+        assert ".trae/rules" in ps_text
+        assert re.search(r"'trae'\s*\{.*?\.trae/rules", ps_text, re.S) is not None
+
+    def test_trae_in_github_release_output(self):
+        """GitHub release script should include trae template packages."""
+        gh_release_text = (REPO_ROOT / ".github" / "workflows" / "scripts" / "create-github-release.sh").read_text(encoding="utf-8")
+
+        assert "spec-kit-template-trae-sh-" in gh_release_text
+        assert "spec-kit-template-trae-ps-" in gh_release_text
+
+    def test_trae_in_agent_context_scripts(self):
+        """Agent context scripts should support trae agent type."""
+        bash_text = (REPO_ROOT / "scripts" / "bash" / "update-agent-context.sh").read_text(encoding="utf-8")
+        pwsh_text = (REPO_ROOT / "scripts" / "powershell" / "update-agent-context.ps1").read_text(encoding="utf-8")
+
+        assert "trae" in bash_text
+        assert "TRAE_FILE" in bash_text
+        assert "trae" in pwsh_text
+        assert "TRAE_FILE" in pwsh_text
+
+    def test_trae_in_powershell_validate_set(self):
+        """PowerShell update-agent-context script should include 'trae' in ValidateSet."""
+        ps_text = (REPO_ROOT / "scripts" / "powershell" / "update-agent-context.ps1").read_text(encoding="utf-8")
+
+        validate_set_match = re.search(r"\[ValidateSet\(([^)]*)\)\]", ps_text)
+        assert validate_set_match is not None
+        validate_set_values = re.findall(r"'([^']+)'", validate_set_match.group(1))
+
+        assert "trae" in validate_set_values
+
+    def test_ai_help_includes_trae(self):
+        """CLI help text for --ai should include trae."""
+        assert "trae" in AI_ASSISTANT_HELP