chore: add AGENTS instructions

[marcellodebernardi]

Summary

• add AGENTS.md as the canonical agent instructions
• update the opening sentence to be tool-neutral
• replace CLAUDE.md with a symlink to AGENTS.md

Testing

• not run (doc-only change)

[greptile-apps]

Greptile Summary

This PR refactors the repository's agent instructions to be tool-neutral by creating AGENTS.md as the canonical source and converting CLAUDE.md to a compatibility symlink.

• Created new AGENTS.md with updated opening sentence to support multiple coding agents (OpenAI Codex, Claude Code)
• Replaced CLAUDE.md with a symlink to AGENTS.md for backward compatibility
• Updated .dockerignore to include AGENTS.md and fixed missing newline at EOF

The changes are purely documentation-related with no functional impact. The symlink approach maintains compatibility with existing tooling that references CLAUDE.md.

Confidence Score: 5/5

• This PR is safe to merge with no risk
• Documentation-only changes with proper backward compatibility via symlink. No code logic modified, no tests required per PR description.
• No files require special attention

Important Files Changed

Filename	Overview
.dockerignore	Added AGENTS.md to dockerignore and fixed missing newline at EOF
AGENTS.md	New canonical agent instructions file with tool-neutral opening sentence
CLAUDE.md	Replaced with symlink to AGENTS.md for backward compatibility

_{Last reviewed commit: 695d213}

[greptile-apps]

_{3 files reviewed, 1 comment}

_{Edit Code Review Agent Settings | Greptile}

[greptile-apps]

Additional Comments (1)

.dockerignore
Consider updating to AGENTS.md since CLAUDE.md is now a symlink. The symlink works but referencing the canonical file is cleaner.

AGENTS.md

_{Note: If this suggestion doesn't match your team's coding style, reply to this and let me know. I'll remember it for next time!}

Prompt To Fix With AI

This is a comment left during a code review.
Path: .dockerignore
Line: 5

Comment:
Consider updating to `AGENTS.md` since `CLAUDE.md` is now a symlink. The symlink works but referencing the canonical file is cleaner.

```suggestion
AGENTS.md
```

<sub>Note: If this suggestion doesn't match your team's coding style, reply to this and let me know. I'll remember it for next time!</sub>

How can I resolve this? If you propose a fix, please make it concise.

[Copilot]

Pull request overview

Adds a canonical, tool-agnostic agent instruction document for the repo and keeps backwards compatibility for existing tooling that expects CLAUDE.md.

Changes:

• Add AGENTS.md as the main agent instructions document.
• Replace CLAUDE.md contents with a symlink pointing at AGENTS.md.

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated 2 comments.

File	Description
CLAUDE.md	Converted to a symlink target reference to keep compatibility while delegating content to AGENTS.md.
AGENTS.md	New canonical agent instructions (overview, architecture notes, commands, and code style guidance).

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[marcellodebernardi]

@greptileai review again with latest changes