Docs: add fixture-based offline testing guidance and expand Hacktoberfest onboarding

CONTRIBUTING.md

@@ -14,6 +14,43 @@ make lint
 make typecheck
 ```
 
+## Testing with fixtures
+
+The CLI can run entirely offline for catalog-related tests by switching into fixture mode. Use `--fixture` to opt in for a single run, or set the environment variables below for the current shell.
+
+- `--fixture` enables fixture mode and optionally accepts a directory argument. When you pass a directory, it sets `CPA_FIXTURE_DIR` for that run.
+- `CPA_CATALOG_FIXTURE=1` enables the same offline catalog path without using the flag.
+- `CPA_FIXTURE_DIR=/path/to/repo` points to the repository root that contains the fixture tree. The CLI looks for `fixtures/catalog/templates.json` there, and local template sources live under `fixtures/templates/` and `fixtures/extensions/`.
+
+The repository ships a small fixture catalog in [fixtures/catalog/templates.json](fixtures/catalog/templates.json) so you can list templates or run a smoke scaffold without hitting GitHub raw URLs.
+
+### List templates offline
+
+From the repository root, this works without network access:
+
+```bash
+uv run create-awesome-python-app --fixture . --list-templates
+```
+
+### Smoke scaffold with fixtures
+
+This uses the local fixture template under [fixtures/templates/example-cli](fixtures/templates/example-cli):
+
+```bash
+repo="$(pwd)"
+uv run create-awesome-python-app --fixture "$repo" --template "file://$repo/fixtures/templates/example-cli" --no-install --no-interactive ./tmp-cpa-smoke
+```
+
+If you prefer environment variables instead of the flag, the equivalent is:
+
+```bash
+export CPA_CATALOG_FIXTURE=1
+export CPA_FIXTURE_DIR="$repo"
+uv run create-awesome-python-app --list-templates
+```
+
+The fixture behavior is exercised in [packages/create-awesome-python-app/tests/test_cli.py](packages/create-awesome-python-app/tests/test_cli.py) and [packages/create-awesome-python-app/tests/test_catalog_fetch.py](packages/create-awesome-python-app/tests/test_catalog_fetch.py).
+
 ## Pull requests
 
 1. Branch from `main`

docs/HACKTOBERFEST.md

@@ -1,5 +1,48 @@
 # Hacktoberfest
 
-- Repo topics include `hacktoberfest`
-- Label `Hacktoberfest` exists
-- Good first issues: look for `good first issue`
+Hacktoberfest is a good time to contribute to the Create Python App ecosystem, especially if you want a small, well-scoped task. The fastest way to get started is to pick a repo, scan for the right labels, and read the contributor guide before opening a PR.
+
+## Repositories newcomers can help with
+
+| Repository | Good task types |
+| --- | --- |
+| [create-python-app](https://github.com/Create-Python-App/create-python-app) | CLI bug fixes, docs polish, fixture/test improvements, release notes, contributor experience work |
+| [cpa-templates](https://github.com/Create-Python-App/cpa-templates) | Template improvements, example updates, extension polish, catalog metadata fixes |
+| [website](https://github.com/Create-Python-App/website) | Landing page copy, docs navigation, examples, small UI polish |
+| [taps](https://github.com/Create-Python-App/taps) | Packaging/documentation improvements, workflow tweaks, examples |
+
+## Labels to look for
+
+- `good first issue` for small, low-risk tasks
+- `help wanted` when a maintainer is actively looking for contributions
+- `Hacktoberfest` for seasonal issues that are a good fit for the event
+
+## How to search for a task
+
+- Start with the repository's Issues tab and filter by one of the labels above.
+- Read the issue description, acceptance criteria, and linked discussion before you comment.
+- Prefer tasks that are clearly scoped, have an obvious next step, and do not depend on private access.
+- If you are not sure where to begin, ask in Discord or open a short note on the issue to say you are reviewing it.
+
+## Before you start
+
+- Read [CONTRIBUTING.md](../CONTRIBUTING.md) first so you know the local workflow and expected PR style.
+- Join the community Discord for quick questions and coordination: [Discord](https://discord.gg/bR5VyATgka)
+- If you are considering an assigned epic such as AI/ML catalog work, avoid duplicating it casually. Confirm the issue is still open and ask in Discord or on the issue thread before you start a parallel effort.
+
+## Suggested first tasks
+
+- Fix a typo or clarify a setup step in the docs
+- Add or improve a test for a CLI or scaffolding edge case
+- Help triage a small bug report or reproduce an issue locally
+- Improve template metadata or examples in a repo that already has a clear scope
+- Update release notes, changelog wording, or contributor-facing examples when they are clearly incomplete
+- Add a small regression test for a fixture or catalog path that is currently undocumented or brittle
+
+## What to avoid
+
+- Do not duplicate an assigned epic just because it looks similar to another issue.
+- Avoid large rewrites unless the issue explicitly asks for them or a maintainer has agreed to the scope.
+- Skip tasks that require private context, deployment access, or a broad architectural decision without guidance.
+
+A good rule of thumb is to choose a task that is small enough to finish in one PR and clearly linked to an existing issue or discussion.

packages/create-python-app-core/README.md

@@ -75,9 +75,9 @@ from create_python_app_core import resolve_source, get_template_dir_path
 source = resolve_source(
  "https://github.com/Create-Python-App/cpa-templates?ref=main&subdir=fastapi"
 )
-print(source.kind) # github
-print(source.ref) # main
-print(source.subdir) # fastapi
+print(source.kind) # github
+print(source.ref) # main
+print(source.subdir) # fastapi
 ```
 
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