Add a short contributing guide

Author: anil-bd

AGENTS.md

@@ -107,5 +107,5 @@ The API returns rows in a different order on each run.
   workflow executes every fenced block in the README against the real API.
 - The field table and the "last verified" badge are rewritten by the daily run.
   Do not edit either by hand.
-- Keep it small: 14 files and about 300 lines of Python. Do not add retries,
+- Keep it small: 15 files and about 300 lines of Python. Do not add retries,
   deduplication, scheduling, databases, async examples or concurrency.

CONTRIBUTING.md

@@ -0,0 +1,39 @@
+# Contributing
+
+The most useful thing you can send us is a broken example.
+
+## Report a bug
+
+[Open an issue](https://github.com/brightdata/amazon-scraper-python/issues) and include:
+
+- the command or the snippet you ran
+- what you expected, and what happened instead
+- your versions: `python --version` and `pip show brightdata-sdk`
+
+Paste the error text rather than a screenshot of it. Never paste your API
+token, in an issue or anywhere else.
+
+Questions about the API, your account or your credits go to
+[Bright Data support](https://brightdata.zendesk.com/hc/en-us/requests/new).
+We cannot see your account from here.
+
+## Send a pull request
+
+Small fixes need no permission. For anything larger, open an issue first, so
+that nobody writes the same code twice.
+
+Before you push, check that:
+
+- `pytest` passes offline, with no token set
+- `ruff check .` is clean
+- every fenced block in the README still runs exactly as pasted
+
+## What this repo will not take
+
+It stays small on purpose: 15 files and about 300 lines of Python. Read
+[AGENTS.md](AGENTS.md) first. It lists what is missing here deliberately,
+including retries, deduplication, scheduling, databases and concurrency.
+
+The outputs in the README come from real runs, and a scheduled job reruns them
+against the live API. Do not edit those blocks, the field table or the
+"last verified" badge by hand.

README.md

@@ -461,7 +461,8 @@ Data connects to, from LangChain to Zapier and n8n:
 ## Support
 
 Bugs in this repo:
-[open an issue](https://github.com/brightdata/amazon-scraper-python/issues).
+[open an issue](https://github.com/brightdata/amazon-scraper-python/issues), and
+[CONTRIBUTING.md](CONTRIBUTING.md) says what to put in it.
 Anything about the API, your account or your credits:
 [Bright Data support](https://brightdata.zendesk.com/hc/en-us/requests/new).