feat(workflow): bug-ancestor-auto-advance@1 demo template (M43 Task 2)

task-templates/workflow/bug-ancestor-auto-advance@1.yaml

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+name: bug-ancestor-auto-advance
+version: 1
+description: >-
+  M43 demo — script-only auto-advance for a bug whose parent milestone carries
+  the opt-in tag. Functionally what R1 (bug-ai-resolve-seed) does today, minus
+  the per-bug tagging step: the trigger rule matches on the PARENT's tag
+  (match.ancestor, spec/workflow-triggers.md §3c), this workflow re-checks the
+  link in-band, tags the bug `ai-resolve` (so the existing R2 verify rule picks
+  it up), then transitions it to verify-pending. Zero LLM nodes.
+runtime: script
+input:
+  # A freshly-created bug has no flow_state yet, so eligibility sees its
+  # lifecycle state (ItemView.workflow_state = flow_state or state). Accept
+  # both lifecycle spellings seen across backends.
+  state: pending
+  tags_required: []
+  tags_forbidden: [blocked, paused, ai-resolve]
+  required_artifacts: []
+escalation_input_states: [pending, open]
+output:
+  state: verify-pending
+scope_budget:
+  # Schema minimum is 1; no node here touches a repo, so these are nominal.
+  files_modified_max: 1
+  lines_diff_max: 1
+  wall_clock_seconds_max: 300
+nodes:
+  # Gate: re-verify in-band that the parent milestone still carries the
+  # opt-in tag (the trigger's ancestor read may be up to 60s stale on the
+  # consumer path, WT-ANC-5). Fails closed — refuse_dispatch on a miss.
+  - id: parent-link-check
+    kind: script
+    cmd: scripts/workflow/parent-link-check
+    on_fail: refuse_dispatch
+    runtime_env:
+      CP_URL: "http://controlplane.agent-runtimes.svc.cluster.local:8100"
+      WORKFLOW_ITEM_UUID: "${item.uuid}"
+      PARENT_LINK_TAG: auto-resolve-bugs
+      PARENT_LINK_RELATION: parent
+  # Opt the bug into the existing verify pipeline (R2 bug-ai-resolve-verify
+  # requires tags_required: [ai-resolve]).
+  - id: tag-ai-resolve
+    kind: script
+    cmd: scripts/workflow/tag-set
+    depends_on: [parent-link-check]
+    on_fail: escalate
+    runtime_env:
+      CP_URL: "http://controlplane.agent-runtimes.svc.cluster.local:8100"
+      WORKFLOW_ITEM_UUID: "${item.uuid}"
+      TAG_SET_ADD: ai-resolve
+  # Advance the bug; R2 then dispatches bug-verify-sonnet@1 at verify-pending.
+  - id: state-tx
+    kind: script
+    cmd: scripts/workflow/state-tx
+    depends_on: [tag-ai-resolve]
+    on_fail: escalate
+    runtime_env:
+      CP_URL: "http://controlplane.agent-runtimes.svc.cluster.local:8100"
+      STATE_TX_NEW_STATE: verify-pending
+# NOTE (script-node credentials, M43): kind: script nodes are harness-exempt
+# (WF-COMP-6) but now carry the AU-51 internal-service bearer token by
+# default — see spec/typed-workflows.md WF-COMP-26. The compiler emits
+# `secrets_required: [CP_SERVICE_TOKEN]` and
+# `runtime_env.CP_SERVICE_TOKEN_FILE=/run/secrets/CP_SERVICE_TOKEN` on
+# every script node; the dispatcher's `_run_script_task` legacy-key
+# branch mounts the dispatcher-process-env CP_SERVICE_TOKEN value as a
+# file. All three nodes above read it via
+# `open(os.environ["CP_SERVICE_TOKEN_FILE"]).read().strip()`. Each script
+# still resolves its own actor identity (OIDC_IDENTITY_EMAIL or
+# CP_Caller-Identity header — see scripts/workflow/tag-set and
+# parent-link-check) for the write envelope.