v0.4.0

[0.4.0] - 2026-04-06

Added

• Root run span (run.execute) in OTel traces — all agent/gate spans are children, queryable by {run.id} in Tempo
• Per-workspace Prometheus metrics: zombie_agent_tokens_by_workspace_total, zombie_runs_completed_by_workspace_total, zombie_runs_blocked_by_workspace_total, zombie_gate_repair_loops_by_workspace_total
• Gate repair loop distribution histogram: zombie_gate_repair_loops_per_run (buckets: 0,1,2,3,5,10)
• GET /v1/workspaces/{id}/billing/summary endpoint — billing breakdown by lifecycle event with period filter
• zombiectl workspace billing CLI command with --period and --json flags
• Grafana dashboard JSON (docs/grafana/agent_run_breakdown.json) — 7 panels, importable with template variables
• Grafana observability playbook (playbooks/009_grafana_observability/001_playbook.md) with gate scripts
• zombie_workspace_metrics_overflow_total counter for cardinality overflow alerting

v0.3.1

Merge pull request #144 from usezombie/feat/openapi-complete-spec

feat(api): complete OpenAPI 3.1 spec with all 43 endpoints