added files

ai-blitz/task-04-buildPipeline-agent-label-param.md

@@ -0,0 +1,26 @@
+# Task 04: Make Jenkins agent label configurable via `agent_label` parameter
+
+- **Type:** Small feature
+- **Source:** `BUGS_AND_IMPROVEMENTS_REPORT.md` §3 (hard-coded `node('slave02')` in `vars/buildPipeline.groovy:16`)
+
+## Goal
+
+`buildPipeline { ... }` consumers can override the Jenkins agent node label without forking the library; existing consumers (no override) still pin to `slave02` so nothing breaks.
+
+## Acceptance Criteria
+
+- [ ] `vars/buildPipeline.groovy:16` reads `param.agent_label` and falls back to `'slave02'` when unset:
+  ```groovy
+  def agentLabel = param.agent_label ?: 'slave02'
+  node(agentLabel) { ... }
+  ```
+- [ ] `README.md` `## Optional parameter` section documents `agent_label` with the same shape as the other params (key, type, default, description). Default must be the legacy `slave02` for backwards compatibility
+- [ ] A consumer Jenkinsfile that passes `agent_label: 'gke-build-agent'` runs on that node; one that omits it still runs on `slave02`
+- [ ] `grep -rn "node\('slave02'\)" vars/ src/` shows zero hard-coded uses **other than the fallback string in `buildPipeline.groovy`**. If other files hard-code the same node, list them out and either fix in the same PR or open follow-up tasks
+- [ ] Smoke-test: one PR pipeline with the override, one without
+- [ ] Add a `## NEVER DO` entry to `CLAUDE.md`: *"Don't add new `node('<literal>')` blocks in `vars/`. New entry points must accept `agent_label` from the param map and fall back to `'slave02'` or a documented default."*
+
+## Notes / known gotchas
+
+- `eksCICD.groovy` and `gkeCICD.groovy` use `podTemplate(yaml: libraryResource("org/meesho/${env.INFRA_ENV}-pod.yaml"))` instead of a `node()` block — they're outside the scope of this task. Only `buildPipeline.groovy` (and any other `node('<literal>')` callers grep finds) needs the change.
+- Don't change the default to `null` or empty — services in the org currently rely on the implicit `slave02` pin; flipping the default mid-flight will silently move builds to whichever agent the master picks.