docs: make devops skill plan-first and jj-aware

skills/gitea-issue-devops-agent/references/plan-template.md

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+# Plan Template
+
+Every delivery issue must have a persisted plan before code changes. Store it in a stable path such as:
+
+```text
+.tmp/devops-plans/<repo>__issue-<number>.md
+```
+
+## Plan Template
+
+```text
+[issue-plan-v1]
+Issue:
+- repo:
+- number:
+- title:
+- type:
+- trigger source:
+
+Status:
+- current: selected
+- owner agent:
+- reviewer:
+
+Branching:
+- target base branch:
+- working branch:
+- PR:
+
+Problem:
+
+Expected behavior:
+
+Acceptance criteria:
+- [ ]
+- [ ]
+
+Related scope:
+- interfaces/apis:
+- directories/files:
+- tests:
+
+Allowed path scope:
+- path/glob 1
+- path/glob 2
+
+Curated context pack:
+- issue body/comments
+- attachments
+- code references
+- prior PRs/commits/docs
+
+Implementation notes:
+
+Verification plan:
+- build/compile:
+- unit/integration:
+- e2e:
+- smoke path:
+- screenshot/browser checks:
+
+Evidence:
+- commit:
+- pipeline:
+- preview url:
+- screenshots:
+
+Risk and blockers:
+
+Handoff notes:
+```
+
+## Required Status Flow
+
+- `selected`
+- `planned`
+- `in_progress`
+- `pending_test`
+- `pending_review`
+- `merged`
+- `closed`
+- `needs_info`
+- `blocked`
+- `rejected`
+
+## Ownership Rules
+
+- MajorAgent creates and updates the plan before coding starts.
+- SubAgent reads only the plan plus minimal code context and updates implementation notes.
+- TestAgent updates verification results and may move the status back to `in_progress`.
+- Human reviewer confirms `pending_review` to merge readiness.
+
+## Scope Rules
+
+- If the diff touches files outside the allowed path scope, stop and either:
+  - update the plan with justification, or
+  - request human approval.
+- If a new dependency or deprecated technology is introduced, record the compatibility decision in `Risk and blockers`.