feat: add SAFE-UC-0034 seed — Saved credit card payment flow

README.md

@@ -104,6 +104,7 @@ Quick contributor workflow:
 | [SAFE-UC-0030](use-cases/SAFE-UC-0030/) | Teen safety & age-assurance enforcement assistant | [Information (51)][naics-51] | Seed |
 | [SAFE-UC-0032](use-cases/SAFE-UC-0032/) | Agentic orchestration for marketplace embedded lending | [Finance and Insurance (52)][naics-52]<br>[Other Activities Related to Credit Intermediation (522390)][naics-522390]<br>[Electronic Shopping and Mail-Order Houses (454110)][naics-454110] | Draft |
 | [SAFE-UC-0033](use-cases/SAFE-UC-0033/) | Skill-driven web app regression testing assistant for pull requests | [Information (51)][naics-51]<br>[Software Publishers (513210)][naics-513210] | Draft |
+| [SAFE-UC-0034](use-cases/SAFE-UC-0034/) | Saved credit card payment flow | [Finance and Insurance (52)][naics-52]<br>[Financial Transactions Processing, Reserve, and Clearinghouse Activities (522320)][naics-522320] | Seed |
 
 > **Don't see your use case?** [Propose a new one][propose-new] — automation assigns the next `SAFE-UC-XXXX` ID and, once a maintainer accepts, scaffolds the seed and opens a PR for you.
 
@@ -123,3 +124,4 @@ Quick contributor workflow:
 [naics-513210]: https://www.census.gov/naics/?chart=2022&details=513210&input=513210
 [naics-522390]: https://www.census.gov/naics/?chart=2022&details=522390&input=522390
 [naics-454110]: https://www.census.gov/naics/?chart=2022&details=454110&input=454110
+[naics-522320]: https://www.census.gov/naics/?chart=2022&details=522320&input=522320

use-cases.naics2022.crosswalk.json

@@ -527,5 +527,22 @@
         "url": "https://playwright.dev/docs/intro"
       }
     ]
+  },
+  {
+    "id": "SAFE-UC-0034",
+    "title": "Saved credit card payment flow",
+    "status": "seed",
+    "repo_path": "use-cases/SAFE-UC-0034/README.md",
+    "naics_2022": [
+      {
+        "code": "52",
+        "name": "Finance and Insurance"
+      },
+      {
+        "code": "522320",
+        "name": "Financial Transactions Processing, Reserve, and Clearinghouse Activities"
+      }
+    ],
+    "summary": "Secure tokenized transaction processing, 3D Secure (SCA) enforcement, and protection against fraud and payment payload manipulation within e-commerce."
   }
 ]

use-cases/SAFE-UC-0034/README.md

@@ -0,0 +1,32 @@
+# Saved credit card payment flow
+
+> Seed page for **SAFE-AUCA**. Expand this into a full analysis using [`templates/use-case-template.md`](../../templates/use-case-template.md).
+
+## Metadata
+
+| Field | Value |
+|---|---|
+| **SAFE Use Case ID** | `SAFE-UC-0034` |
+| **Status** | `seed` |
+| **NAICS 2022** | `Finance and Insurance (52)`, `Financial Transactions Processing, Reserve, and Clearinghouse Activities (522320)` |
+| **Last updated** | `2026-02-24` |
+
+## Workflow Description (Seed)
+
+Secure tokenized transaction processing, 3D Secure (SCA) enforcement, and protection against fraud and payment payload manipulation within e-commerce.
+
+## In Scope / Out Of Scope
+
+- **In scope:** TBD
+- **Out of scope:** TBD
+
+## SAFE-MCP Mapping (Seed Skeleton)
+
+| Kill-chain stage | Failure/attack pattern | SAFE-MCP technique(s) | Recommended controls | Tests |
+|---|---|---|---|---|
+| TBD | TBD | TBD | TBD | TBD |
+
+## Next Steps
+
+- Expand this page to `draft` using the full template in `templates/use-case-template.md`.
+- Add public evidence links and concrete control/test mappings.