Payment Security Architecture AGENTS.md Template

Overview

AGENTS.md Template for payment security architecture defines a repeatable workflow for AI coding agents to design, implement, and govern a secure payments platform. It covers multi-agent orchestration, agent handoffs, context/memory rules, tool governance, and human review. Direct answer: this template provides a ready-to-paste operating manual that enables both single-agent and multi-agent orchestration to secure tokenization, vault access, risk scoring, and compliance controls across payment flows.

When to Use This AGENTS.md Template

• When establishing a repeatable payment security workflow with AI agents (tokenization, vaults, encryption, vault rotation).
• When coordinating handoffs across planner, implementer, auditor, validator, researcher, and domain specialist agents.
• When enforcing tool governance, security constraints, and PCI-DSS alignment in an orchestrated environment.
• When you need a project-level operating context for both single-agent and multi-agent scenarios.

Copyable AGENTS.md Template

# AGENTS.md

Project role
- Owner/Lead: Security Architect
- Stakeholders: Payments Platform Engineering, Security, Compliance, Risk Management

Agent roster and responsibilities
- Planner: designs the multi-agent plan, sequences tasks, defines memory needs, identifies handoff points.
- Implementer: translates plan into concrete actions (code changes, config), executes tool calls, ensures outputs align with safety constraints.
- Auditor: reviews outputs for policy conformance, PCI-DSS alignment, and risk controls.
- Validator: runs tests (unit, integration, security) and verifies outputs meet acceptance criteria.
- Researcher: gathers threat intel, standards guidance (PCI-DSS, PSD2, tokenization standards), and external data sources.
- Domain Specialist: payment security domain expert (tokenization, vault management, cryptography, key management, fraud signals).

Supervisor or orchestrator behavior
- The Coordinator (orchestrator) maintains a plan, assigns tasks, enforces memory and source of truth, and gates tool usage.
- Coordinates handoffs between agents with explicit conditions and timeouts.
- Maintains audit trail of decisions, iterations, and approvals.

Handoff rules between agents
- Planner → Implementer: when plan validated; provide task list with context, memory pointers, and data sources.
- Implementer → Auditor: when artifacts/logs/tests exist; provide outputs and notes.
- Auditor → Validator: when conformance verified; else loop back with remediation notes.
- Researcher/Domain Specialist → Planner: when new risks identified; feed back to plan.
- In emergencies, Supervisor may re-route tasks to domain experts with risk notes.

Context, memory, and source-of-truth rules
- Shared memory store with versioned entries; memory keys namespaced by stage.
- Sources of truth include PCI-DSS mappings, tokenization specs, vault config, and production risk criteria.
- Do not rely on ephemeral chat context; persist decisions to memory with timestamps and author.

Tool access and permission rules
- Approved tools: Git, CI pipelines, secret manager, issue tracker, sandbox APIs.
- Secrets must never be embedded; retrieve from vault at runtime.
- Prefer read-only access; require explicit write/deploy approvals for production changes.
- Production endpoints access requires formal PCI-compliant change window and approval.

Architecture rules
- Architecture must be modular: tokenization service, vault, gateway, risk scoring service, policy engine.
- All inter-service calls are auditable; sensitive data masked in logs.
- Event-driven with clear contracts and versioned APIs.

File structure rules
- Root/
  AGENTS.md
  workflows/
    payment-security-architecture/
      planners/
      implementers/
      auditors/
      validators/
      researchers/
      domain-specialists/
      memory/
      policies/
  configs/
  tests/

Data, API, or integration rules
- Use sandbox/test endpoints; do not call live networks in tests.
- Logs contain pseudonymized identifiers; no PII in logs.

Validation rules
- Outputs pass PCI-DSS policy checks and threat-model alignment.
- Tests cover tokenization, encryption, vault access.
- Validation produces a clean pass artifact.

Security rules
- Secrets in memory must be encrypted; rotate keys.
- All code changes go through security review; credential actions need dual approval.

Testing rules
- Unit tests for each agent; integration tests simulating end-to-end flow; security tests.
- CI gating; policy-violation causes fail-fast.

Deployment rules
- Deploy to staging first; run canaries; require production approval after criteria.
- Rollback plan and audit logs preserved.

Human review and escalation rules
- HITL review by Security Architect for security-critical decisions.
- Escalate policy violations to compliance; suspend changes if risk detected.

Failure handling and rollback rules
- On failure, revert changes, restore last known good state, notify security contact.
- Use incremental rollbacks with audit logs.

Things Agents must not do
- Do not access production payment data in tests.
- Do not bypass approval gates or security controls.
- Do not mutate production data without authorization.
- Do not log secrets.

Recommended Agent Operating Model

The recommended operating model defines explicit roles, decision boundaries, and escalation paths for payment security workflows. Planner defines strategy and handoffs, Implementer executes actions with safety constraints, Auditor verifies conformance, Validator validates outputs, Researcher informs risk posture, and Domain Specialist provides domain-specific guidance. The Orchestrator enforces context propagation, ensures auditability, and escalates risk to the Security Architect as needed.

Recommended Project Structure

root/
  AGENTS.md
  workflows/
    payment-security-architecture/
      planners/
      implementers/
      auditors/
      validators/
      researchers/
      domain-specialists/
      memory/
      policies/
  configs/
  tests/

Core Operating Principles

• Operate with explicit memory and source-of-truth; avoid context drift.
• Enforce least-privilege tool access and secret management.
• Gated handoffs with clear criteria and artifacts.
• Maintain auditable decision logs and outcomes.
• Always validate against PCI-DSS and tokenization standards.

Agent Handoff and Collaboration Rules

• Planner plans with input from Domain Specialist and Researcher; outputs go to Implementer.
• Implementer produces artifacts and logs; Auditor reviews before Validator execution.
• Researcher and Domain Specialist provide risk signals to Planner for replanning.
• Handoffs require documented context, memory pointers, and data sources.

Tool Governance and Permission Rules

• Use approved toolchain; secrets retrieved from vault at runtime.
• All production changes require dual approvals and PCI-compliant change window.
• Logs must mask sensitive data; monitoring for anomalous tool activity.

Code Construction Rules

• Write deterministic, idempotent actions; avoid side effects in tests.
• Encapsulate security checks in dedicated modules; enforce contract tests.
• Prefer declarative configurations; avoid hard-coded credentials.

Security and Production Rules

• Enforce encryption at rest and in transit; rotate keys regularly.
• Audit all access to payment data; minimize exposure in logs and artifacts.
• Segregate duties; require human review for high-risk changes.

Testing Checklist

• Unit tests for each agent capability.
• Integration tests simulating end-to-end payment flows.
• Security tests for tokenization, vault access, and data handling.
• CI gating; canary deployment checks.

Common Mistakes to Avoid

• Skipping formal handoffs or memory propagation between agents.
• Embedding secrets in code or logs; leaking PII in artifacts.
• Over-assuming producer/consumer boundaries; failing to enforce policy gates.

Related implementation resources: AI Use Case for Sales Pipeline Reviews and Deal Risk Scoring and AI Use Case for Gym Franchises Using Excel To Analyze Membership Peak Check-In Times and Adjust Staffing Levels.

FAQ

What is the purpose of this AGENTS.md Template for payment security architecture?

This template provides a concrete operating manual that defines roles, orchestration, rules, and governance for AI coding agents working on payment security architecture, including tokenization, vault access, and risk controls.

Which agents are involved and what are their responsibilities?

Planner designs the plan; Implementer executes tasks; Auditor checks policy conformance; Validator tests outcomes; Researcher gathers standards data; Domain Specialist provides payment security domain guidance.

How are handoffs and memory managed in multi-agent orchestration?

Handoffs occur at defined plan boundaries with artifacts and memory pointers; a central Coordinator maintains versioned memory entries and enforces source-of-truth for each transition.

What security and compliance requirements govern handling payment data?

PCI-DSS alignment, tokenization standards, vault access controls, encryption, and secret-management policies govern all actions; production changes require dual approvals and change windows.

How is validation, testing, and deployment controlled?

Validation includes unit, integration, and security tests; deployment follows staged promotion with canaries and rollback plans, plus HITL reviews for risk changes.