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74 lines
3.6 KiB
Markdown
74 lines
3.6 KiB
Markdown
# ADR 0001 — Tier-1 spikes: Temporal, OPA, OpenFGA (gated)
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- **Status:** Proposed
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- **Date:** 2026-04-16
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- **Context:** Dealix Tier-1 roadmap targets **Temporal** for crash-proof long workflows and **OPA / OpenFGA** (or Cedar) for separable policy and fine-grained authorization. The repo today uses **FastAPI, Celery, LangGraph**, and in-app policy patterns.
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## Decision (interim)
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**Do not** merge production dependencies on Temporal, OPA, or OpenFGA until **all** spike exit criteria below are met for each technology independently.
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Until then, document them only as **targets** in:
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- [`../governance/execution-fabric.md`](../governance/execution-fabric.md)
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- [`../governance/trust-fabric.md`](../governance/trust-fabric.md)
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- [`../governance/technology-radar-tier1.md`](../governance/technology-radar-tier1.md)
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## Spike — Temporal
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**Goal:** One non-customer-critical workflow (or shadow mode) proving resume after worker kill and **worker versioning** story.
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**Exit criteria:**
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1. Workflow code and tests in CI (docker-compose or Temporal test server).
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2. Idempotency keys on external side effects; compensation path documented.
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3. Security review for secrets and network boundaries.
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4. Runbook: deploy, rollback, and “what happens on double start.”
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5. Product owner sign-off to move additional flows.
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## Spike — OPA (or equivalent PDP)
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**Goal:** One policy (e.g. environment promotion or “may send message”) evaluated from **structured input** (JSON) with decision logged.
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**Exit criteria:**
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1. Policy bundle versioned in repo; CI runs `opa test` (or equivalent) on policies.
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2. No duplication of the same rule in prompts and OPA without explicit ownership.
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3. Latency and failure mode documented (fail closed vs open).
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## Spike — OpenFGA (or Cedar)
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**Goal:** One authorization model (e.g. “user U may read DD room R for tenant T”) with tuple writes on lifecycle events.
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**Exit criteria:**
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1. Model file + migration plan for existing RBAC.
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2. Performance test for hot paths.
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3. Audit: who changed tuples; backup/restore considered.
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## Evidence pack (per spike)
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Each spike produces: design note, threat assumptions, test commands and results, rollback plan, and explicit **Approved / Rejected / Extend pilot** outcome recorded in this ADR or a superseding ADR.
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## Consequences
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- Engineering avoids **split brain** between agent narration and system-of-record workflows.
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- Compliance and security can review **one** policy and auth surface per decision type.
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## Related
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- [`../execution-matrix-90d-tier1.md`](../execution-matrix-90d-tier1.md) Phase 0–1
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- [`../blueprint-master-architecture.md`](../blueprint-master-architecture.md)
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---
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## Annex — Temporal operational criteria (high-risk paths)
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When Temporal moves from *Planned* to *Pilot* for **high-risk** workflow types (money movement, regulated messaging, cross-tenant admin):
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1. **Pinned workflow types** — register each workflow type + task queue in the service catalog; no anonymous “catch-all” workers for governed domains.
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2. **Rollback rehearsal** — run a **simulated rollback** (cancel + compensation or documented manual playbook) in staging before every production worker upgrade that changes workflow code.
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3. **Worker versioning** — adopt Temporal’s worker versioning policy before expanding beyond the pilot; track preview/beta notes in [`../references/tier1-external-index.md`](../references/tier1-external-index.md) (Temporal changelog link).
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These criteria are **release gate** rows in [`../RELEASE_READINESS_MATRIX_AR.md`](../RELEASE_READINESS_MATRIX_AR.md) when Temporal is claimed for a candidate build.
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