docs: add agent instruction entrypoints

[casper-phantom]

Note

Low risk: This documentation-only change adds one regular Markdown file and one relative symlink; it does not affect package or application behavior.

Summary

• Add verified repository-specific guidance for agents working across the TypeScript and native platform code.
• Expose the same root instructions through CLAUDE.md by linking it to canonical AGENTS.md.
• Document the existing install, lint, build, test, and contribution workflows without changing runtime code.

Agent provenance

• implementation: Oz — not exposed by host / not exposed by host

Casper-Issue-Key: react-native-webview/agent-instructions-symlink
casper-run-id: 01a015f1-7a82-7445-933f-845992c7f133

Summary by CodeRabbit

• Documentation
  • Added repository guidance covering its purpose, structure, development commands, and contribution requirements.
  • Added a linked reference for consistent access to the same guidance.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: de4b41d9-cecc-498c-b8fa-4ad674a8104e

📥 Commits

Reviewing files that changed from the base of the PR and between ebd8509 and d814d2d.

📒 Files selected for processing (2)

• AGENTS.md
• CLAUDE.md

Included review availability: 0 reviews are currently available. Based on recent review activity, included reviews refill at 1 per hour.

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📝 Walkthrough

Walkthrough

The pull request adds repository development guidance in AGENTS.md and exposes the same guidance through a CLAUDE.md symbolic link.

Changes

Repository guidance

Layer / File(s)	Summary
Repository guidance and agent entrypoint AGENTS.md, CLAUDE.md	AGENTS.md documents repository structure, development commands, testing, TypeScript, versioning, and Changesets. CLAUDE.md links to AGENTS.md.

Suggested reviewers: jamonholmgren, titozzz

Merge Risk: ⚪ Minimal · up to d814d

This documentation-only change adds repository guidance and exposes it through a symlink without changing package or application behavior; no actionable merge-blocking risk remains after normal checks and review.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the addition of AGENTS.md and CLAUDE.md instruction entrypoints.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch casper/agent-instructions-symlink

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_{Comment @coderabbitai help to get the list of available commands.}

[casper-phantom]

Closing this rollout PR because the repository did not already have root AGENTS.md or CLAUDE.md guidance. We only want to add the reciprocal entrypoint where substantive instructions already exist.