fix: update skip tag docs to reflect exact matching with lookahead

Tags now match exactly — @skip-ocp-helm won't filter @skip-ocp-helm-nightly.
Updated tables and examples to clarify per-job isolation.

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

Author: subhashkhileri

docs/overlay/reference/run-e2e.md

@@ -90,14 +90,14 @@ When `JOB_NAME` is set (by OpenShift CI), the script auto-derives a Playwright t
 
 ### How It Works
 
-The job suffix is extracted from `JOB_NAME` by stripping everything up to and including `-e2e-`:
+The job suffix is extracted from `JOB_NAME` by stripping everything up to and including `-e2e-`. A negative lookahead `(?!-)` is appended so each tag matches exactly — `@skip-ocp-helm` won't accidentally filter `@skip-ocp-helm-nightly`:
 
-| JOB_NAME (suffix shown) | Derived tag | `--grep-invert` |
-|--------------------------|-------------|-----------------|
-| `...-e2e-ocp-helm` | `@skip-ocp-helm` | `@skip-ocp-helm` |
-| `...-e2e-ocp-helm-nightly` | `@skip-ocp-helm-nightly` | `@skip-ocp-helm-nightly` |
-| `...-e2e-ocp-operator` | `@skip-ocp-operator` | `@skip-ocp-operator` |
-| `...-e2e-ocp-operator-nightly` | `@skip-ocp-operator-nightly` | `@skip-ocp-operator-nightly` |
+| JOB_NAME (suffix shown) | `--grep-invert` pattern |
+|--------------------------|-------------------------|
+| `...-e2e-ocp-helm` | `@skip-ocp-helm(?!-)` |
+| `...-e2e-ocp-helm-nightly` | `@skip-ocp-helm-nightly(?!-)` |
+| `...-e2e-ocp-operator` | `@skip-ocp-operator(?!-)` |
+| `...-e2e-ocp-operator-nightly` | `@skip-ocp-operator-nightly(?!-)` |
 
 If `JOB_NAME` doesn't contain `-e2e-`, no tag is derived and no filtering is applied.
 
@@ -106,10 +106,10 @@ If `JOB_NAME` doesn't contain `-e2e-`, no tag is derived and no filtering is app
 Add Playwright tags to `test.describe` or individual `test` calls:
 
 ```typescript
-// Skip in ocp-helm-nightly job
+// Skip only in ocp-helm-nightly job
 test.describe("My Plugin", { tag: "@skip-ocp-helm-nightly" }, () => { ... });
 
-// Skip in all ocp-helm jobs (PR + nightly, since regex matches as substring)
+// Skip only in ocp-helm PR check job (won't affect nightly)
 test("expensive test", { tag: "@skip-ocp-helm" }, async () => { ... });
 
 // Multiple tags — skip in both helm and operator nightly

docs/overlay/tutorials/ci-pipeline.md

@@ -107,12 +107,14 @@ test.describe("My Plugin", { tag: "@skip-ocp-helm-nightly" }, () => {
 
 ### Available Tags
 
-| Tag | Skipped in |
-|-----|-----------|
-| `@skip-ocp-helm` | `e2e-ocp-helm` (PR check) |
-| `@skip-ocp-helm-nightly` | `e2e-ocp-helm-nightly` |
-| `@skip-ocp-operator` | `e2e-ocp-operator` (PR check) |
-| `@skip-ocp-operator-nightly` | `e2e-ocp-operator-nightly` |
+| Tag | Skipped in | Not skipped in |
+|-----|-----------|----------------|
+| `@skip-ocp-helm` | `e2e-ocp-helm` (PR check) | `e2e-ocp-helm-nightly` |
+| `@skip-ocp-helm-nightly` | `e2e-ocp-helm-nightly` | `e2e-ocp-helm` (PR check) |
+| `@skip-ocp-operator` | `e2e-ocp-operator` (PR check) | `e2e-ocp-operator-nightly` |
+| `@skip-ocp-operator-nightly` | `e2e-ocp-operator-nightly` | `e2e-ocp-operator` (PR check) |
+
+Each tag matches exactly — `@skip-ocp-helm` won't accidentally skip tests in the nightly job.
 
 Multiple tags can be combined on a single test or describe block: