T8523: add Copilot custom review instructions (#465)

* Add easy-wins improvement spec for vyos.vyos collection

Covers five phases: formatting compliance, runtime.yml redirect fix,
deprecated feature cleanup, missing unit tests, and template deduplication.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* Add implementation plan for easy-wins improvements

15 tasks across 5 phases: formatting compliance, runtime.yml bugfix,
deprecated code cleanup, missing unit tests, template deduplication.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* Update spec and plan with architect review corrections

Key changes:
- Defer Phase 5 (template deduplication) to v7.0.0: route_maps
  are not identical, BGP dedup blocked by Python module-level
  scoping, OSPF has fundamentally different command paradigms
- Add .git-blame-ignore-revs step to Phase 1
- Add missing test cases: overridden/rendered for resource modules,
  aggregate/purge/with_address for vyos_vlan
- Fix incorrect claim that version.py LooseVersion is unused
- Add sequential merge requirement to preamble

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* chore: add .worktrees/ and .claude/ to .gitignore

* T8523: add Copilot custom review instructions

Add .github/copilot-instructions.md and path-specific instruction
files under .github/instructions/ to teach Copilot project conventions:
copyright attribution, changelog fragment key selection, test mocking
patterns, required state coverage for resource modules, and module
option description standards.

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

* T8523: remove copyright instructions from Copilot config

Copyright attribution rules are internal guidance kept in Claude
config, not in Copilot review instructions.

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

* T8523: remove docs/superpowers files inadvertently included

These spec/plan files came from local main commits that were
pulled in during rebase. They are unrelated to this PR.

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

* T8523: fix inaccuracies flagged by Copilot review

- CLI quoting: clarify that boolean flags and bare keywords are
  unquoted; only string/address values use single quotes
- Test mocking: describe get_device_data / execute_show_command as
  the primary resource module pattern (used by most existing tests);
  note get_resource_connection_facts approach as an alternative
- modules.instructions.md: broaden applyTo to include meta/runtime.yml
  so redirect guidance fires when that file is edited

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

* T8523: fix legacy module mocking guidance in tests.instructions.md

Existing legacy tests use side_effect for run_commands, not
return_value. Updated to describe side_effect as the standard
approach, note return_value as also acceptable for fixed responses,
and clarify that the patched helper varies by module (run_commands
for command/facts/ping, load_config/get_config for vyos_config).

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

* T8523: fix four more inaccuracies flagged by Copilot review

- CLI quoting: address values in firewall groups are unquoted in
  fixtures; instruct reviewers to align with surrounding fixture
  style rather than flagging all unquoted addresses
- Resource module mocking: add .start()/.stop() calls to the snippet
  so it matches the actual setUp/tearDown pattern in existing tests
- terminal plugin versions: reference README.md instead of hardcoding
  a version list that diverges from README
- changelog fragment: remove stale "copyright headers" claim (that
  section was dropped from the instruction files)

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

---------

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

5 files changed, 210 insertions, 0 deletions

diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
new file mode 100644
index 00000000..fc25faa1
--- /dev/null
+++ b/.github/copilot-instructions.md
@@ -0,0 +1,49 @@
+# Copilot Review Instructions — vyos.vyos
+
+This is the `vyos.vyos` Ansible network collection for managing VyOS devices.
+Namespace `vyos`, name `vyos`, version `6.0.0`. All modules are prefixed `vyos_`.
+
+## Commit and PR standards
+
+- Every commit title must start with a Phorge task ID: `T<number>: description`.
+- Every PR must have exactly one changelog fragment in `changelogs/fragments/`.
+- PR descriptions that state a test count (e.g. "Add 8 unit tests") must match the actual number of test methods in the changed files. Flag mismatches.
+
+## Changelog fragments
+
+Fragments are YAML files under `changelogs/fragments/`. Valid top-level keys:
+
+| Key | Use for |
+|-----|---------|
+| `trivial` | Developer tooling, CI, housekeeping, formatting-only changes |
+| `bugfixes` | Bug fixes |
+| `minor_changes` | New features or user-visible improvements |
+| `major_changes` | Breaking changes |
+| `security_fixes` | Security fixes |
+| `doc_changes` | Documentation-only changes |
+
+Flag any fragment that uses `minor_changes` for what is actually developer tooling (linting, formatting, gitignore, test scaffolding). Those should use `trivial`.
+
+## Module architecture
+
+Two module families:
+
+**Resource modules** (`vyos_interfaces`, `vyos_firewall_rules`, `vyos_bgp_global`, etc.) follow a four-part structure under `plugins/module_utils/network/vyos/`:
+- `argspec/{resource}/` — argument spec
+- `config/{resource}/` — config builder
+- `facts/{resource}/` — facts parser
+- `rm_templates/{resource}.py` — regex/Jinja2 CLI templates
+
+Resource modules support all states: `merged`, `replaced`, `overridden`, `deleted`, `rendered`, `gathered`, `parsed`.
+
+**Legacy modules** (`vyos_vlan`, `vyos_config`, `vyos_command`, `vyos_user`, etc.) do not follow the resource module pattern.
+
+## VyOS CLI conventions
+
+- Set commands: `set interfaces ethernet eth0 address '192.0.2.1/24'`
+- Delete commands: `delete interfaces ethernet eth0 address '192.0.2.1/24'`
+- Quoting varies by context. In general, string values (descriptions, names, ELIN numbers) are single-quoted; boolean flags and bare keywords are not. However, address/prefix values may be quoted or unquoted depending on where they appear:
+  - Quoted: `address '192.0.2.1/24'`, `description 'my-iface'`, `elin '0000000911'`
+  - Unquoted: `address 192.0.2.1` (in firewall groups), `disable`, `mtu-ignore`, `vif 200`
+- When reviewing tests and fixtures, align with the quoting style used by surrounding fixtures rather than flagging a missing quote as an error.
+- Interface types: `ethernet`, `loopback`, `bonding`, `bridge`, `tunnel`, `wireguard`.
diff --git a/.github/instructions/modules.instructions.md b/.github/instructions/modules.instructions.md
new file mode 100644
index 00000000..d7782e1e
--- /dev/null
+++ b/.github/instructions/modules.instructions.md
@@ -0,0 +1,37 @@
+---
+applyTo: "plugins/**,meta/runtime.yml"
+---
+
+# Plugin conventions
+
+## Module option descriptions
+
+- Must be complete English sentences ending with a period.
+- No grammar errors. Common mistake: "the number hops" should be "the number of hops".
+- Deprecated options must include `removed_in_version` and `removed_from_collection` fields.
+- Do not add new options with `deprecated: true` — remove deprecated options entirely.
+
+## rm_templates files
+
+Files in `plugins/module_utils/network/vyos/rm_templates/` define regex parsers and Jinja2 generators for a resource module. Each entry has:
+- `name` — unique identifier
+- `getval` — compiled regex with named groups
+- `setval` — Jinja2 template or callable producing a VyOS CLI command
+- `result` — dict mapping regex groups to facts structure
+- `shared` (optional) — bool, whether the template applies to a shared config block
+
+## meta/runtime.yml redirects
+
+Short-name redirects must point to the actual module name with the `vyos_` prefix. For example:
+```yaml
+snmp_server:
+  redirect: vyos.vyos.vyos_snmp_server   # correct
+  # NOT: vyos.vyos.vyos_snmp_servers     # wrong (pluralized)
+```
+
+Verify any changed redirect target exists as a real module file under `plugins/modules/`.
+
+## cliconf / terminal plugins
+
+`plugins/cliconf/vyos.py` — do not modify without understanding edit-mode and commit semantics.
+`plugins/terminal/vyos.py` — handles prompt detection; regex changes require testing against all supported VyOS versions listed in README.md.
diff --git a/.github/instructions/tests.instructions.md b/.github/instructions/tests.instructions.md
new file mode 100644
index 00000000..150db41e
--- /dev/null
+++ b/.github/instructions/tests.instructions.md
@@ -0,0 +1,114 @@
+---
+applyTo: "tests/unit/**"
+---
+
+# Unit test conventions
+
+## Base class and structure
+
+All test classes inherit from `TestVyosModule` in `tests/unit/modules/network/vyos/vyos_module.py`.
+
+```python
+class TestVyosFooModule(TestVyosModule):
+    module = vyos_foo
+
+    def setUp(self): ...
+    def tearDown(self): ...
+    def load_fixtures(self, commands=None, filename=None): ...
+    def test_...(self): ...
+```
+
+## Mocking: resource modules
+
+Resource module tests require two framework-level patches in `setUp` with corresponding cleanup in `tearDown`:
+
+```python
+# in setUp:
+self.mock_get_resource_connection_config = patch(
+    "ansible_collections.ansible.netcommon.plugins.module_utils.network.common.cfg.base.get_resource_connection"
+)
+self.get_resource_connection_config = self.mock_get_resource_connection_config.start()
+
+self.mock_get_resource_connection_facts = patch(
+    "ansible_collections.ansible.netcommon.plugins.module_utils.network.common.facts.facts.get_resource_connection"
+)
+self.get_resource_connection_facts = self.mock_get_resource_connection_facts.start()
+
+# in tearDown:
+self.mock_get_resource_connection_config.stop()
+self.mock_get_resource_connection_facts.stop()
+```
+
+Most resource module tests also patch the facts class's `get_device_data` method directly and use it in `load_fixtures`:
+
+```python
+# in setUp:
+self.mock_execute_show_command = patch(
+    "ansible_collections.vyos.vyos.plugins.module_utils.network.vyos."
+    "facts.{resource}.{resource}.{Resource}Facts.get_device_data"
+)
+self.execute_show_command = self.mock_execute_show_command.start()
+
+# in load_fixtures:
+def load_from_file(*args, **kwargs):
+    return load_fixture("vyos_{resource}_config.cfg")
+self.execute_show_command.side_effect = load_from_file
+```
+
+An alternative pattern sets `self.get_resource_connection_facts.return_value.get_config.return_value = fixture_data` in `load_fixtures` instead — both approaches work, but the `get_device_data` pattern is used by most existing tests.
+
+## Mocking: legacy modules
+
+Legacy modules (`vyos_vlan`, `vyos_config`, `vyos_command`, etc.) patch the specific helper the module calls, directly in the module under test. Which helper depends on the module:
+
+```python
+# vyos_command, vyos_facts, vyos_ping — patch run_commands
+self.mock_run_commands = patch("ansible_collections.vyos.vyos.plugins.modules.vyos_foo.run_commands")
+# vyos_config — patch get_config / load_config
+self.mock_load_config = patch("ansible_collections.vyos.vyos.plugins.modules.vyos_foo.load_config")
+```
+
+In `load_fixtures`, configure the mock using `side_effect` (for dynamic fixture loading) or `return_value` (for a fixed response):
+
+```python
+# side_effect — used by most existing legacy tests
+def load_from_file(*args, **kwargs):
+    return load_fixture("vyos_foo_config.cfg")
+self.run_commands.side_effect = load_from_file
+
+# return_value — acceptable for simple fixed responses
+self.run_commands.return_value = [SHOW_OUTPUT]
+```
+
+## load_fixtures and filename
+
+`execute_module()` always calls `load_fixtures()`. Never set mock return values inside a test method — they will be overwritten by the next `execute_module` call. Use the `filename` parameter to vary the fixture:
+
+```python
+def load_fixtures(self, commands=None, filename=None):
+    if filename == "empty":
+        self.run_commands.return_value = [EMPTY_OUTPUT]
+    else:
+        self.run_commands.return_value = [DEFAULT_OUTPUT]
+```
+
+Then call: `self.execute_module(changed=True, commands=commands, filename="empty")`
+
+## Fixture files
+
+Raw device CLI output lives in `tests/unit/modules/network/vyos/fixtures/` as `.cfg` files.
+Load with `load_fixture("vyos_foo_config.cfg")`.
+
+## Required test coverage for resource modules
+
+A complete resource module test file should cover all applicable states:
+- `merged` (including an idempotent case)
+- `replaced`
+- `overridden`
+- `deleted`
+- `rendered` — assert `result["rendered"]` matches expected CLI commands
+- `gathered` — assert `result["gathered"]` contains expected structured data
+- `parsed` — pass `running_config=raw_string` and assert `result["parsed"]`
+
+Flag test files that are missing `rendered`, `gathered`, or `parsed` tests without explanation.
+
diff --git a/.gitignore b/.gitignore
index cbe347c4..1dbe8b0e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -120,3 +120,9 @@ changelogs/.plugin-cache.yaml
 inventory.network
 
 *.bak
+
+# Git worktrees
+.worktrees/
+
+# Claude Code
+.claude/
diff --git a/changelogs/fragments/copilot-instructions.yml b/changelogs/fragments/copilot-instructions.yml
new file mode 100644
index 00000000..c7af5c74
--- /dev/null
+++ b/changelogs/fragments/copilot-instructions.yml
@@ -0,0 +1,4 @@
+---
+trivial:
+  - Add Copilot custom review instructions to guide automated code review with
+    project-specific conventions for tests, changelog fragments, and module patterns.