refactor(ci): move CLAUDE.md to .github/ to keep repo root clean

CLAUDE.md is CI-only config — moving it to .github/ ensures it is not
visible at the repo root when contributors clone lerobot. Both workflows
now explicitly reference .github/CLAUDE.md in their prompt/system-prompt.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.github/workflows/claude-code-review.yml

@@ -30,14 +30,15 @@ jobs:
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
           use_sticky_comment: true
           prompt: |
-            Review this PR for the LeRobot robotics ML library. Provide structured, actionable feedback.
+            Read `.github/CLAUDE.md` for lerobot-specific conventions, then review this PR.
+            Provide structured, actionable feedback.
 
             Focus areas (in priority order):
             1. **Correctness**: Logic errors, off-by-ones, wrong tensor shapes, incorrect loss functions
             2. **Type safety**: All new/modified Python code must pass `mypy --strict`; check for missing annotations
-            3. **Backwards compatibility**: Does this break `LeRobotDataset`, `Policy`, `Robot`, `Teleoperator`, or `Env` public APIs?
+            3. **Backwards compatibility**: Does this break `LeRobotDataset`, `Policy`, `Robot`, `Teleoperator`, `Env`, or `Processor` public APIs?
             4. **Tests**: New features must have tests; no silent behavioral changes
-            5. **Code style**: Explicit over magic, minimal LOC, no unnecessary abstractions, no decorative comments
+            5. **Code style**: Explicit over magic, no unnecessary abstractions, no decorative comments
             6. **HF integration**: Dataset streaming, `push_to_hub`, HF Hub compatibility preserved?
             7. **pre-commit**: Would `pre-commit run -a` pass? (ruff, mypy, typos, zizmor)
 

.github/workflows/claude.yml

@@ -53,7 +53,6 @@ jobs:
           additional_permissions: |
             actions: read
 
-          # Optional: Add claude_args to customize behavior and configuration
+          claude_args: '--system-prompt "Read .github/CLAUDE.md for lerobot-specific conventions before responding."'
           # See https://github.com/anthropics/claude-code-action/blob/main/docs/usage.md
           # or https://code.claude.com/docs/en/cli-reference for available options
-          # claude_args: '--allowed-tools Bash(gh pr:*)'