feat: harden permanent-agent heartbeat instructions (#2081)
## Summary
Hardens permanent-agent operating law while keeping the
heartbeat/executor split:
- **Critical Rules** in task-scoped and no-task heartbeat system prompts
(survive custom `HEARTBEAT.md`)
- Stronger default procedures: disposition checklist, scoped-wake,
blocked dedup, progress note style
- **Wake Delta multi-assign inventory** (ranked, cap 8,
coordination-only framing) + `checkout_conflict` regression test
- Standing instructions six-section template for blank custom create /
empty detail insert
- Onboarding interview guidance to prefer structured `instructionsText`
- Playbooks, CONCEPTS, agents.md accuracy; remove stale agent
gap-analysis doc
Plan:
`docs/plans/2026-07-12-001-feat-permanent-agent-heartbeat-instructions-plan.md`
## Test plan
- [x] `pnpm --filter @fusion/core exec vitest run
src/__tests__/assigned-task-ranking.test.ts`
- [x] `pnpm --filter @fusion/engine exec vitest run
src/__tests__/agent-heartbeat-procedures.test.ts
src/__tests__/heartbeat-executor.test.ts -u`
- [x] `pnpm --filter @fusion/dashboard exec vitest run
app/components/__tests__/standing-instructions-template.test.ts`
- [ ] CI gate green on PR
## Residual Review Findings
None recorded at open (inline review; no residual sink).
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
* **New Features**
* Added ranked multi-assignment context to agent heartbeat wake-ups,
including task status, ownership, and lease details.
* Added standing-instructions templates for creating and editing
permanent agents.
* Improved onboarding guidance with a consistent six-section instruction
structure.
* Added clearer heartbeat handling for blocked tasks, no-task runs, and
checkout conflicts.
* **Documentation**
* Added permanent-agent heartbeat playbooks and expanded coordination
glossary entries.
* Updated documentation indexes and heartbeat behavior guidance.
* **Tests**
* Added coverage for task ranking, instruction templates, wake-up
context, and conflict handling.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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