Line 60: .claude/agents/playwright-test-reviewer.md: custom agent markdown frontmatter is malformed: failed to parse YAML frontmatter: Nested mappings are not allowed in compact mappings at line 2, column 14: (Pattern: Copilot CLI timestamped ERROR messages, Raw log: 2026-03-23T00:12:56.519Z [ERROR] .claude/agents/playwright-test-reviewer.md: custom agent markdown frontmatter is malfor...)

Line 55: .claude/agents/playwright-test-planner.md: custom agent markdown frontmatter is malformed: failed to parse YAML frontmatter: Nested mappings are not allowed in compact mappings at line 2, column 14: (Pattern: Copilot CLI timestamped ERROR messages, Raw log: 2026-03-23T00:12:56.519Z [ERROR] .claude/agents/playwright-test-planner.md: custom agent markdown frontmatter is malform...)

Line 50: .claude/agents/playwright-test-healer.md: custom agent markdown frontmatter is malformed: failed to parse YAML frontmatter: Nested mappings are not allowed in compact mappings at line 2, column 14: (Pattern: Copilot CLI timestamped ERROR messages, Raw log: 2026-03-23T00:12:56.519Z [ERROR] .claude/agents/playwright-test-healer.md: custom agent markdown frontmatter is malforme...)

Line 45: .claude/agents/playwright-test-generator.md: custom agent markdown frontmatter is malformed: failed to parse YAML frontmatter: Nested mappings are not allowed in compact mappings at line 2, column 14: (Pattern: Copilot CLI timestamped ERROR messages, Raw log: 2026-03-23T00:12:56.518Z [ERROR] .claude/agents/playwright-test-generator.md: custom agent markdown frontmatter is malfo...)

Line 40: .claude/agents/playwright-e2e-pr-updater.md: custom agent markdown frontmatter is malformed: failed to parse YAML frontmatter: Nested mappings are not allowed in compact mappings at line 2, column 14: (Pattern: Copilot CLI timestamped ERROR messages, Raw log: 2026-03-23T00:12:56.518Z [ERROR] .claude/agents/playwright-e2e-pr-updater.md: custom agent markdown frontmatter is malfo...)

Line 35: .claude/agents/docs-update-writer.md: custom agent markdown frontmatter is malformed: failed to parse YAML frontmatter: Nested mappings are not allowed in compact mappings at line 2, column 14: (Pattern: Copilot CLI timestamped ERROR messages, Raw log: 2026-03-23T00:12:56.518Z [ERROR] .claude/agents/docs-update-writer.md: custom agent markdown frontmatter is malformed: f...)

Line 30: .claude/agents/docs-update-reviewer.md: custom agent markdown frontmatter is malformed: failed to parse YAML frontmatter: Nested mappings are not allowed in compact mappings at line 2, column 14: (Pattern: Copilot CLI timestamped ERROR messages, Raw log: 2026-03-23T00:12:56.518Z [ERROR] .claude/agents/docs-update-reviewer.md: custom agent markdown frontmatter is malformed:...)

Line 25: .claude/agents/docs-update-planner.md: custom agent markdown frontmatter is malformed: failed to parse YAML frontmatter: Nested mappings are not allowed in compact mappings at line 2, column 14: (Pattern: Copilot CLI timestamped ERROR messages, Raw log: 2026-03-23T00:12:56.518Z [ERROR] .claude/agents/docs-update-planner.md: custom agent markdown frontmatter is malformed: ...)

Line 20: .claude/agents/docs-screenshot-capturer.md: custom agent markdown frontmatter is malformed: failed to parse YAML frontmatter: Nested mappings are not allowed in compact mappings at line 2, column 14: (Pattern: Copilot CLI timestamped ERROR messages, Raw log: 2026-03-23T00:12:56.518Z [ERROR] .claude/agents/docs-screenshot-capturer.md: custom agent markdown frontmatter is malfor...)

Line 16: Request to GitHub API at https://api.business.githubcopilot.com/agents/swe/custom-agents/lablup/backend.ai-webui?exclude_invalid_config=true&include_sources=org,enterprise failed with status 400 (request ID: D800:9CF14:685FE47:8385BCD:69C08588), body: checking third-party user token: bad request: Personal Access Tokens are not supported for this endpoint (Pattern: Copilot CLI timestamped ERROR messages, Raw log: 2026-03-23T00:12:56.517Z [ERROR] Request to GitHub API at https://api.business.githubcopilot.com/agents/swe/custom-agent...)

Node.js 20 actions are deprecated. The following actions are running on Node.js 20 and may not work as expected: actions/cache@v4, actions/setup-node@v4, actions/upload-artifact@v4. Actions will be forced to run with Node.js 24 by default starting June 2nd, 2026. Please check if updated versions of these actions are available that support Node.js 24. To opt into Node.js 24 now, set the FORCE_JAVASCRIPT_ACTIONS_TO_NODE24=true environment variable on the runner or in your workflow file. Once Node.js 24 becomes the default, you can temporarily opt out by setting ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION=true. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Line 65: could not load remote agents for lablup/backend.ai-webui: server returned 400: Bad Request (Pattern: Copilot CLI timestamped WARNING messages, Raw log: 2026-03-23T00:12:56.519Z [WARNING] could not load remote agents for lablup/backend.ai-webui: server returned 400: Bad Re...)

Line 18: Failed to load custom agents for lablup/backend.ai-webui: checking third-party user token: bad request: Personal Access Tokens are not supported for this endpoint (Pattern: Copilot CLI timestamped WARNING messages, Raw log: 2026-03-23T00:12:56.518Z [WARNING] Failed to load custom agents for lablup/backend.ai-webui: checking third-party user t...)

- Line 1: Missing required 'type' field