Add AGENTS.md documentation for AI tools

[vogella]

This adds comprehensive documentation for AI agents and tools working with the Eclipse SWT codebase. The new AGENTS.md file includes:

• Project overview and architecture details
• Complete build instructions (Maven/Tycho and native libraries)
• Repository structure and development workflows
• Essential development rules (OSGi, resource disposal, UI threading)
• Testing best practices and troubleshooting guidance
• AI agent-specific guidelines

CLAUDE.md is updated to reference AGENTS.md, following the pattern used in eclipse.platform.ui repository.

🤖 Generated with Claude Code

[laeubi]

Please rename existing copilot instructions (any maybe adjust).

As AGENTS.MD is a standard I wonder why Claude is needing an own file?

[github-actions]

Test Results

  118 files  ±0    118 suites  ±0   16m 55s ⏱️ -30s
4 651 tests ±0  4 634 ✅ +2  17 💤  - 2  0 ❌ ±0 
  330 runs  ±0    326 ✅ ±0   4 💤 ±0  0 ❌ ±0 

Results for commit e9c013f. ± Comparison against base commit 2df129f.

[vogella]

Please rename existing copilot instructions (any maybe adjust).

I assume you mean delete? Copilot can use Agends.md directly

As AGENTS.MD is a standard I wonder why Claude is needing an own file?

I don't know why Claude does not follow the (new) standard. My assumption is that as the leading engine in code generation they play on their marketshare for code support and do not yet care about standards. It seems that standards are usually not pushed by the market leader. Just a personal opinion btw as I do not have insights in the Claude dev team.

[laeubi]

I assume you mean delete? Copilot can use Agends.md directly

No why delete and replace with something else new? So rename it and maybe ask claude to update it if you think it is not sufficient enough. At least I have tested it already with this instructions and made sure they are working. So why would one want to start from scratch?

I don't know why Claude does not follow the (new) standard. My assumption is that as the leading engine in code generation they play on their marketshare for code support and do not yet care about standards.

For me a tool not following common practice can hardly be leading but anyways it sounds odd... so is there a issue/ticket for claude to support this in the future?

[vogella]

The new Agends.md file was created by on the copilot instruction so this request is already covered.

For me a tool not following common practice can hardly be leading

Yes, this never happened before, like IntelliJ not promoting LSP usage or MS Window ignoring standards ;-)

[laeubi]

The new Agends.md file was created by on the copilot instruction so this request is already covered.

Why is the there no rename in this commit? I really don't want to go through and make a diff on my own.

So this should contain:

• rename A > B
• then changes on top of it to get a diff
• add additional claude.md

otherwise its impossible to follow the history.

[vogella]

Ok, will update the PR once I find time.