Fix Cursor detection to use CURSOR_AGENT/cursor-agent signals

[Copilot]

The bundled am-i-ai library in executable_git was updated to use CURSOR_AGENT env var and cursor-agent process name, but test scripts still used the old CURSOR_AI/cursor signals—causing Cursor detection to silently regress.

Changes

• test_env_only.sh:

  • Replace CURSOR_AI with CURSOR_AGENT in test cases
  • Fix function extraction to source ami_check_env and its dependencies from the bundled library

• test_detection.sh:

  • Add CURSOR_AGENT env var detection to check_env_vars()
  • Change process tree pattern from cursor to cursor-agent

# Before
CURSOR_AI=1 check_env_vars  # ❌ No longer detected

# After  
CURSOR_AGENT=1 check_env_vars  # ✅ Detects cursor

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Cursor detection no longer matches existing inputs</issue_title>
<issue_description> Cursor detection no longer matches existing inputs

The Cursor checks now only look for CURSOR_AGENT/cursor-agent, but the repo’s own fixtures still set CURSOR_AI and search for a cursor process (see test_env_only.sh lines 10–26 and test_detection.sh lines 92–94). Running the current tests or any environment that still uses the old CURSOR_AI flag will now produce no Cursor detection, so the updated library immediately regresses our validation for Cursor without updating the callers or tests to the new signal names.

Useful? React with 👍 / 👎.

Originally posted by @chatgpt-codex-connector[bot] in #40 (comment)
</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Cursor detection no longer matches existing inputs #41

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

---

Summary by cubic

Update Cursor detection in test scripts to use CURSOR_AGENT and cursor-agent, matching the library and preventing false positives. This resolves the regression and re-enables reliable Cursor validation.

• Bug Fixes
  • Detect Cursor via env var: CURSOR_AGENT.
  • Detect Cursor via process: cursor-agent.
  • Fix function sourcing in test_env_only.sh to call ami_check_env.
  • Fixes Cursor detection no longer matches existing inputs #41.

^{Written for commit f4af68c. Summary will update automatically on new commits.}