Add CONTRIBUTING.md and AGENTS.md

AGENTS.md

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+# Agent guidelines
+
+Instructions for AI coding agents (Claude Code, Copilot, Cursor, etc.) working in this repo.
+
+## Project overview
+
+<!-- TODO: one paragraph describing what this repo does -->
+
+## Local setup
+
+<!-- TODO: mirror the setup steps from CONTRIBUTING.md -->
+
+```bash
+# Example
+git clone git@github.com:redis-performance/<repo>.git
+cd <repo>
+```
+
+## Branch naming
+
+Same as human contributors: `<type>/<short-description>` (e.g. `fix/off-by-one-in-pipeline`).
+
+## Coding standards
+
+- Match the style already in the file you are editing.
+- Prefer clear, minimal changes over large refactors unless explicitly asked.
+- Do not add comments that describe *what* the code does — only add comments when the *why* is non-obvious.
+- Do not introduce new dependencies without checking with the maintainer.
+
+## Running tests
+
+<!-- TODO: exact command to run tests -->
+
+```bash
+# Example
+make test
+```
+
+Always run tests before declaring a task complete.
+
+## How to submit changes
+
+1. Create a branch: `git checkout -b <type>/<description>`.
+2. Commit with a clear message focused on *why*, not *what*.
+3. Open a pull request against `main`.
+4. Do **not** push directly to `main`.
+
+## What to avoid
+
+- Do not reformat files unrelated to your change.
+- Do not remove error handling or tests.
+- Do not commit secrets, credentials, or large binary files.
+- Do not amend published commits.

CONTRIBUTING.md

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+# Contributing
+
+We treat this repo as "Open Source" within Redis: anyone who clears the bar below is welcome to contribute.
+
+## Local setup
+
+<!-- TODO: fill in repo-specific setup steps -->
+
+```bash
+# Example — replace with actual steps
+git clone git@github.com:redis-performance/<repo>.git
+cd <repo>
+# install dependencies, build, etc.
+```
+
+## Branch naming
+
+```
+<type>/<short-description>
+```
+
+Types: `feat`, `fix`, `refactor`, `test`, `docs`, `chore`
+
+Example: `feat/add-pipeline-mode`
+
+## Coding standards
+
+- Keep changes focused; one logical change per PR.
+- Follow the conventions already present in the codebase (formatting, naming, error handling).
+- No dead code, no commented-out blocks.
+
+## Submitting changes
+
+1. Fork or create a branch from `main`.
+2. Make your changes with clear, atomic commits.
+3. Open a pull request against `main` with a descriptive title and summary.
+4. Address review comments promptly; force-push to the same branch to update.
+
+## Testing
+
+- All new behaviour must be covered by tests.
+- Existing tests must pass: run the test suite locally before opening a PR.
+- Coverage should not decrease.
+
+<!-- TODO: add the exact test command for this repo -->
+
+## Review process
+
+- At least one maintainer approval is required before merge.
+- CI must be green.
+- Maintainers may request changes or close PRs that don't meet the bar — this is normal and not personal.