Write full README: overview, component map, deploy, demo script, caveats

README.md

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 # hncb-fusion-deid-demo
 
-All-AWS demo: reversible PII de-identification round trip through Axway Amplify AI Gateway (Fusion) with an Amazon Bedrock AgentCore agent. HNCB use case.
+All-AWS demo of the HNCB use case: a **reversible PII de-identification round trip**
+through **Axway Amplify AI Gateway (Fusion)**, with the reasoning done by an
+**Amazon Bedrock AgentCore** agent. The advisor types a query containing a real
+name; the cloud only ever sees a token; the real identity is restored on-prem
+before the answer is shown.
+
+> **Status: unrun scaffold.** This was authored, not executed. Review everything,
+> pin dependency versions, and expect to adjust AgentCore/Fusion specifics to the
+> current CLI/console. Demo-grade, not production-grade.
+
+## What it demonstrates
+Raw PII (a Chinese name + a Taiwan ROC ID) is detected on ingress, replaced with a
+**random, format-safe token**, and only the tokenized prompt goes to the cloud
+agent. The agent calls a tool back "on-prem" with the token, gets a de-identified
+evidence package, and writes talking points. Fusion restores the identity on the
+way out. **The money shot:** show the Bedrock request / AgentCore trace live — the
+cloud only ever saw `CUST_000123`, never `王小明`.
+
+## Trust zones are logical
+Everything is one AWS account. The "on-prem" zone is a set of tag-labelled
+resources (`Zone = on-prem-VPC-A`) standing in for HNCB's branch data centre. This
+demo proves **behaviour and data-flow**, not physical data residency — say so on
+camera: *"in production this zone is the branch DC; here a VPC stands in for it."*
+
+## Component → service map (their 8 steps)
+| Step | Component | Service in this repo |
+|---|---|---|
+| 1, 8 | Advisor UI | `ui/index.html` on S3+CloudFront (or local) |
+| 2, 3-route, 8 | **Fusion AI Gateway** (the product) | ECS Fargate — `terraform/ecs.tf`, config in `fusion/POLICY_SETUP.md` |
+| 2 | PII **detector** (typed findings, not redaction) | Presidio on Fargate — `presidio/` |
+| 2, 4, 8 | Token **vault** (reversible map) | DynamoDB — `terraform/main.tf` |
+| 3, 7 | Cloud **agent** + model | AgentCore Runtime + Bedrock — `agent/` |
+| 4 | Tool bridge (Lambda → MCP tool) | AgentCore Gateway — `scripts/agentcore_setup.sh` |
+| 4-6 | On-prem **RAG tool** + data | Lambda + DynamoDB — `lambda_rag/`, `seed/` |
+| all | Observability | AgentCore Observability + CloudWatch |
+
+## Repo layout
+```
+terraform/           core infra (DynamoDB, RAG Lambda, IAM) + ECS hosting
+lambda_rag/          RAG tool: token resolve -> de-identified evidence package
+agent/               Strands agent for AgentCore Runtime + tool schema
+presidio/            PII detector service (returns typed findings) + Dockerfile
+seed/                fake customer (Wang Xiaoming) + seed script
+ui/                  advisor UI with restored-vs-tokenized split view
+scripts/             deploy.sh, agentcore_setup.sh, teardown.sh
+fusion/              POLICY_SETUP.md  (the console/flow config — the manual part)
+```
+
+## Prerequisites
+`aws-cli` configured (creds + region), `terraform >= 1.5`, `docker`, `python3`,
+the AgentCore CLI (`npm i -g @aws/agentcore`), Bedrock model access enabled for
+`bedrock_model_id`, and an Axway Amplify AI Gateway (Fusion) container image you
+supply (`fusion_image_uri`).
+
+## Deploy
+```bash
+bash scripts/deploy.sh          # infra -> presidio image -> ECS -> seed -> AgentCore
+# then: configure Fusion policy (fusion/POLICY_SETUP.md)
+# then: point ui/index.html GATEWAY_URL at the Fusion host and open it
+```
+
+## Demo script (maps to the 8 steps)
+1. Advisor UI: submit *"請幫我整理王小明最近三個月的理財往來，並給我下次拜訪話術。"*
+2. Fusion detects `王小明` + `A123456789`, tokenizes, logs tokens only.
+3. Show the Bedrock/AgentCore trace — the prompt the cloud saw contains `CUST_000123`.
+4-6. Agent tool-calls back on-prem; RAG resolves the token, returns a summary.
+7. Agent writes talking points (no PII).
+8. Fusion restores `王小明`; the UI shows the restored answer beside the tokenized view.
+
+## Teardown
+```bash
+bash scripts/teardown.sh        # stop paying for Fargate / AgentCore
+```
+
+## Honest caveats
+- **zh-TW detection is demo-narrow.** Presidio here is tuned to the scripted
+  entities; a smooth run is **not** evidence of production zh-TW recall — that
+  remains the real-engagement risk.
+- **Per-request randomization** ("different each time") lives in the Fusion mint
+  step (`fusion/POLICY_SETUP.md`); confirm it satisfies HNCB's requirement.
+- **The agentic token-resolution loop** (agent tool call → on-prem RAG resolves the
+  token) is custom orchestration — it is not turnkey on any gateway, which is
+  exactly where Fusion's orchestration depth is the argument.