diff --git a/CHANGELOG.md b/CHANGELOG.md
index 60683961..15fa6c57 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,14 @@ All notable changes to the MEW Protocol CLI will be documented in this file.
 
 ## [Unreleased]
 
+### Changed
+- **[u7k] Upgrade ink to v6** - Updated ink from v3.2.0 to v6.3.1 and React from v18 to v19
+  - Proposal: `spec/cli/proposals/u7k-upgrade-ink-v6/`
+  - Status: ✅ Implemented
+  - Benefits: Latest features, bug fixes, and security updates
+  - Breaking changes: Requires React 19, pure ESM (already using ESM)
+  - Code changes: Added explicit return type annotations to React components
+
 ## [v0.5.1] - 2025-01-06
 
 ### Fixed
diff --git a/package-lock.json b/package-lock.json
index 19388a31..49105b8a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -17,13 +17,13 @@
         "debug": "^4.3.4",
         "eventemitter3": "^5.0.1",
         "express": "^4.18.2",
-        "ink": "^3.2.0",
+        "ink": "^6.3.1",
         "js-yaml": "^4.1.0",
         "jsonpath-plus": "^10.3.0",
         "micromatch": "^4.0.5",
         "openai": "^5.20.1",
         "pm2": "^6.0.10",
-        "react": "^18.2.0",
+        "react": "^19.0.0",
         "uuid": "^10.0.0",
         "ws": "^8.18.0"
       },
@@ -34,6 +34,7 @@
         "@eslint/js": "^9.35.0",
         "@types/js-yaml": "^4.0.5",
         "@types/node": "^20.14.0",
+        "@types/react": "^19.0.0",
         "@types/ws": "^8.5.10",
         "@typescript-eslint/eslint-plugin": "^8.43.0",
         "@typescript-eslint/parser": "^8.43.0",
@@ -112,6 +113,46 @@
         "node": ">=16.0.0"
       }
     },
+    "node_modules/@alcalzone/ansi-tokenize": {
+      "version": "0.2.1",
+      "resolved": "https://registry.npmjs.org/@alcalzone/ansi-tokenize/-/ansi-tokenize-0.2.1.tgz",
+      "integrity": "sha512-0rJMGIohyuFVf/uq9wCTtVLmVs/+7zoCGYkj7T8igV3XMPpjaSspXx/JvD9zmGprPVsIVvVRYVCaBkEz+SvN9g==",
+      "license": "MIT",
+      "dependencies": {
+        "ansi-styles": "^6.2.1",
+        "is-fullwidth-code-point": "^5.0.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@alcalzone/ansi-tokenize/node_modules/ansi-styles": {
+      "version": "6.2.3",
+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-6.2.3.tgz",
+      "integrity": "sha512-4Dj6M28JB+oAH8kFkTLUo+a2jwOFkuqb3yucU0CANcRRUbxS0cP0nZYCGjcc3BNXwRIsUVmDGgzawme7zvJHvg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/ansi-styles?sponsor=1"
+      }
+    },
+    "node_modules/@alcalzone/ansi-tokenize/node_modules/is-fullwidth-code-point": {
+      "version": "5.1.0",
+      "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-5.1.0.tgz",
+      "integrity": "sha512-5XHYaSyiqADb4RnZ1Bdad6cPp8Toise4TzEjcOYDHZkTCbKgiUl7WTUCpNWHuxmDt91wnsZBc9xinNzopv3JMQ==",
+      "license": "MIT",
+      "dependencies": {
+        "get-east-asian-width": "^1.3.1"
+      },
+      "engines": {
+        "node": ">=18"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/@ampproject/remapping": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/@ampproject/remapping/-/remapping-2.3.0.tgz",
@@ -1468,6 +1509,16 @@
         "undici-types": "~6.21.0"
       }
     },
+    "node_modules/@types/react": {
+      "version": "19.2.2",
+      "resolved": "https://registry.npmjs.org/@types/react/-/react-19.2.2.tgz",
+      "integrity": "sha512-6mDvHUFSjyT2B2yeNx2nUgMxh9LtOWvkhIU3uePn2I2oyNymUAX1NIsdgviM4CH+JSrp2D2hsMvJOkxY+0wNRA==",
+      "devOptional": true,
+      "license": "MIT",
+      "dependencies": {
+        "csstype": "^3.0.2"
+      }
+    },
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       "version": "10.0.0",
       "resolved": "https://registry.npmjs.org/@types/uuid/-/uuid-10.0.0.tgz",
@@ -1484,12 +1535,6 @@
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@@ -1946,33 +1991,6 @@
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-      },
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-      },
-      "funding": {
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-      }
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-      "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-0.21.3.tgz",
-      "integrity": "sha512-t0rzBq87m3fVcduHDUFhKmyyX+9eo6WQjZvf51Ea/M0Q7+T374Jp1aUiyUl0GKxp8M/OETVHSDvmkyPgvX+X2w==",
-      "license": "(MIT OR CC0-1.0)",
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-      },
-      "funding": {
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     "node_modules/ansi-regex": {
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@@ -2026,27 +2044,6 @@
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-      "license": "MIT",
-      "engines": {
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-      "resolved": "https://registry.npmjs.org/auto-bind/-/auto-bind-4.0.0.tgz",
-      "integrity": "sha512-Hdw8qdNiqdJ8LqT0iK0sVzkFbzg6fhnQqqfWhBDxcHZvU75+B+ayzTy8x+k5Ix0Y92XOhOUlx74ps+bA6BeYMQ==",
-      "license": "MIT",
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-      },
-      "funding": {
-        "url": "https://github.com/sponsors/sindresorhus"
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@@ -2246,64 +2243,6 @@
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-      "license": "MIT",
-      "engines": {
-        "node": ">=6"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/sindresorhus"
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-      "resolved": "https://registry.npmjs.org/cli-cursor/-/cli-cursor-3.1.0.tgz",
-      "integrity": "sha512-I/zHAwsKf9FqGoXM4WWRACob9+SNukZTd94DWF57E4toouRulbCxcUh6RKUEOQlYTHJnzkPMySvPNaaSLNfLZw==",
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-        "string-width": "^4.2.0"
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-      "funding": {
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-      "resolved": "https://registry.npmjs.org/code-excerpt/-/code-excerpt-3.0.0.tgz",
-      "integrity": "sha512-VHNTVhd7KsLGOqfX3SyeO8RyYPMp1GJOg194VITk04WMYCv4plV68YWe6TJZxd9MhobjtpMRnVky01gqZsalaw==",
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-      },
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@@ -2376,15 +2315,6 @@
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-      "resolved": "https://registry.npmjs.org/convert-to-spaces/-/convert-to-spaces-1.0.2.tgz",
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-      "license": "MIT",
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@@ -2414,6 +2344,13 @@
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       }
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+    "node_modules/csstype": {
+      "version": "3.1.3",
+      "resolved": "https://registry.npmjs.org/csstype/-/csstype-3.1.3.tgz",
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+    },
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       "resolved": "https://registry.npmjs.org/debug/-/debug-4.4.3.tgz",
@@ -2508,6 +2445,18 @@
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+      "resolved": "https://registry.npmjs.org/environment/-/environment-1.1.0.tgz",
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+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
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@@ -2545,6 +2494,16 @@
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+      "resolved": "https://registry.npmjs.org/es-toolkit/-/es-toolkit-1.40.0.tgz",
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+      "license": "MIT",
+      "workspaces": [
+        "docs",
+        "benchmarks"
+      ]
+    },
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@@ -3179,6 +3138,18 @@
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       }
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+      "resolved": "https://registry.npmjs.org/get-east-asian-width/-/get-east-asian-width-1.4.0.tgz",
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+      "license": "MIT",
+      "engines": {
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+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
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@@ -3386,15 +3357,6 @@
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       "license": "MIT",
+      "optional": true,
+      "peer": true,
       "engines": {
         "node": ">=8.3.0"
       },
@@ -6920,6 +7125,27 @@
         }
       }
     },
+    "node_modules/react-reconciler": {
+      "version": "0.32.0",
+      "resolved": "https://registry.npmjs.org/react-reconciler/-/react-reconciler-0.32.0.tgz",
+      "integrity": "sha512-2NPMOzgTlG0ZWdIf3qG+dcbLSoAc/uLfOwckc3ofy5sSK0pLJqnQLpUFxvGcN2rlXSjnVtGeeFLNimCQEj5gOQ==",
+      "license": "MIT",
+      "dependencies": {
+        "scheduler": "^0.26.0"
+      },
+      "engines": {
+        "node": ">=0.10.0"
+      },
+      "peerDependencies": {
+        "react": "^19.1.0"
+      }
+    },
+    "node_modules/react-reconciler/node_modules/scheduler": {
+      "version": "0.26.0",
+      "resolved": "https://registry.npmjs.org/scheduler/-/scheduler-0.26.0.tgz",
+      "integrity": "sha512-NlHwttCI/l5gCPR3D1nNXtWABUmBwvZpEQiD4IXSbIDq8BzLIK/7Ir5gTFSGZDUu37K5cMNp0hFtzO38sC7gWA==",
+      "license": "MIT"
+    },
     "node_modules/readdirp": {
       "version": "4.1.2",
       "resolved": "https://registry.npmjs.org/readdirp/-/readdirp-4.1.2.tgz",
@@ -6944,19 +7170,6 @@
         "node": ">=4"
       }
     },
-    "node_modules/restore-cursor": {
-      "version": "3.1.0",
-      "resolved": "https://registry.npmjs.org/restore-cursor/-/restore-cursor-3.1.0.tgz",
-      "integrity": "sha512-l+sSefzHpj5qimhFSE5a8nufZYAM3sBSVMAPtYkmC+4EH2anSGaEMXSD0izRQbu9nfyQ9y5JrVmp7E8oZrUjvA==",
-      "license": "MIT",
-      "dependencies": {
-        "onetime": "^5.1.0",
-        "signal-exit": "^3.0.2"
-      },
-      "engines": {
-        "node": ">=8"
-      }
-    },
     "node_modules/reusify": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/reusify/-/reusify-1.1.0.tgz",
@@ -7059,16 +7272,6 @@
       "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==",
       "license": "MIT"
     },
-    "node_modules/scheduler": {
-      "version": "0.20.2",
-      "resolved": "https://registry.npmjs.org/scheduler/-/scheduler-0.20.2.tgz",
-      "integrity": "sha512-2eWfGgAqqWFGqtdMmcL5zCMK1U8KlXv8SQFGglL3CEtd0aDVDWgeF/YoCmvln55m5zSk3J/20hTaSBeSObsQDQ==",
-      "license": "MIT",
-      "dependencies": {
-        "loose-envify": "^1.1.0",
-        "object-assign": "^4.1.1"
-      }
-    },
     "node_modules/semver": {
       "version": "7.7.2",
       "resolved": "https://registry.npmjs.org/semver/-/semver-7.7.2.tgz",
@@ -7177,6 +7380,8 @@
       "resolved": "https://registry.npmjs.org/shell-quote/-/shell-quote-1.8.3.tgz",
       "integrity": "sha512-ObmnIF4hXNg1BqhnHmgbDETF8dLPCggZWBjkQfhZpbszZnYur5DUljTcCHii5LC3J5E0yeO/1LIMyH+UvHQgyw==",
       "license": "MIT",
+      "optional": true,
+      "peer": true,
       "engines": {
         "node": ">= 0.4"
       },
@@ -7284,20 +7489,6 @@
         "node": ">=18"
       }
     },
-    "node_modules/slice-ansi": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/slice-ansi/-/slice-ansi-3.0.0.tgz",
-      "integrity": "sha512-pSyv7bSTC7ig9Dcgbw9AuRNUb5k5V6oDudjZoMBSr13qpLBG7tB+zgCkARjq7xIUgdz5P1Qe8u+rSGdouOOIyQ==",
-      "license": "MIT",
-      "dependencies": {
-        "ansi-styles": "^4.0.0",
-        "astral-regex": "^2.0.0",
-        "is-fullwidth-code-point": "^3.0.0"
-      },
-      "engines": {
-        "node": ">=8"
-      }
-    },
     "node_modules/source-map": {
       "version": "0.8.0-beta.0",
       "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.8.0-beta.0.tgz",
@@ -7755,18 +7946,6 @@
         "node": ">= 0.8.0"
       }
     },
-    "node_modules/type-fest": {
-      "version": "0.12.0",
-      "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-0.12.0.tgz",
-      "integrity": "sha512-53RyidyjvkGpnWPMF9bQgFtWp+Sl8O2Rp13VavmJgfAP9WWG6q6TkrKU8iyJdnwnfgHI6k2hTlgqH4aSdjoTbg==",
-      "license": "(MIT OR CC0-1.0)",
-      "engines": {
-        "node": ">=10"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/sindresorhus"
-      }
-    },
     "node_modules/type-is": {
       "version": "1.6.18",
       "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
@@ -8488,18 +8667,6 @@
         "node": ">=8"
       }
     },
-    "node_modules/widest-line": {
-      "version": "3.1.0",
-      "resolved": "https://registry.npmjs.org/widest-line/-/widest-line-3.1.0.tgz",
-      "integrity": "sha512-NsmoXalsWVDMGupxZ5R08ka9flZjjiLvHVAWYOKtiKM8ujtZWr9cRffak+uSE48+Ob8ObalXpwyeUiyDD6QFgg==",
-      "license": "MIT",
-      "dependencies": {
-        "string-width": "^4.0.0"
-      },
-      "engines": {
-        "node": ">=8"
-      }
-    },
     "node_modules/word-wrap": {
       "version": "1.2.5",
       "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.5.tgz",
@@ -8510,20 +8677,6 @@
         "node": ">=0.10.0"
       }
     },
-    "node_modules/wrap-ansi": {
-      "version": "6.2.0",
-      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-6.2.0.tgz",
-      "integrity": "sha512-r6lPcBGxZXlIcymEu7InxDMhdW0KDxpLgoFLcguasxCaJ/SOIZwINatK9KY/tf+ZrlywOKU0UDj3ATXUBfxJXA==",
-      "license": "MIT",
-      "dependencies": {
-        "ansi-styles": "^4.0.0",
-        "string-width": "^4.1.0",
-        "strip-ansi": "^6.0.0"
-      },
-      "engines": {
-        "node": ">=8"
-      }
-    },
     "node_modules/wrap-ansi-cjs": {
       "name": "wrap-ansi",
       "version": "7.0.0",
@@ -8576,17 +8729,11 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
-    "node_modules/yoga-layout-prebuilt": {
-      "version": "1.10.0",
-      "resolved": "https://registry.npmjs.org/yoga-layout-prebuilt/-/yoga-layout-prebuilt-1.10.0.tgz",
-      "integrity": "sha512-YnOmtSbv4MTf7RGJMK0FvZ+KD8OEe/J5BNnR0GHhD8J/XcG/Qvxgszm0Un6FTHWW4uHlTgP0IztiXQnGyIR45g==",
-      "license": "MIT",
-      "dependencies": {
-        "@types/yoga-layout": "1.9.2"
-      },
-      "engines": {
-        "node": ">=8"
-      }
+    "node_modules/yoga-layout": {
+      "version": "3.2.1",
+      "resolved": "https://registry.npmjs.org/yoga-layout/-/yoga-layout-3.2.1.tgz",
+      "integrity": "sha512-0LPOt3AxKqMdFBZA3HBAt/t/8vIKq7VaQYbuA8WxCgung+p9TVyKRYdpvCb80HcdTN2NkbIKbhNwKUfm3tQywQ==",
+      "license": "MIT"
     },
     "node_modules/zod": {
       "version": "3.25.76",
diff --git a/package.json b/package.json
index 25da9175..fe2baef1 100644
--- a/package.json
+++ b/package.json
@@ -62,13 +62,13 @@
     "debug": "^4.3.4",
     "eventemitter3": "^5.0.1",
     "express": "^4.18.2",
-    "ink": "^3.2.0",
+    "ink": "^6.3.1",
     "js-yaml": "^4.1.0",
     "jsonpath-plus": "^10.3.0",
     "micromatch": "^4.0.5",
     "openai": "^5.20.1",
     "pm2": "^6.0.10",
-    "react": "^18.2.0",
+    "react": "^19.0.0",
     "uuid": "^10.0.0",
     "ws": "^8.18.0"
   },
@@ -76,6 +76,7 @@
     "@eslint/js": "^9.35.0",
     "@types/js-yaml": "^4.0.5",
     "@types/node": "^20.14.0",
+    "@types/react": "^19.0.0",
     "@types/ws": "^8.5.10",
     "@typescript-eslint/eslint-plugin": "^8.43.0",
     "@typescript-eslint/parser": "^8.43.0",
diff --git a/spec/cli/proposals/u7k-upgrade-ink-v6/decision-u7k-upgrade-ink-v6.md b/spec/cli/proposals/u7k-upgrade-ink-v6/decision-u7k-upgrade-ink-v6.md
new file mode 100644
index 00000000..1650c035
--- /dev/null
+++ b/spec/cli/proposals/u7k-upgrade-ink-v6/decision-u7k-upgrade-ink-v6.md
@@ -0,0 +1,57 @@
+# Decision: u7k - Upgrade Ink to v6
+
+## Context
+
+The MEW Protocol CLI uses the `ink` framework (React for CLIs) for its interactive terminal UI. The current version (v3.2.0) is significantly outdated, with v6.3.1 being the latest stable version.
+
+## Decision
+
+We will upgrade `ink` from v3.2.0 to v6.3.1, along with upgrading React from v18.2.0 to v19.0.0.
+
+## Rationale
+
+1. **Technical Health**: Keeping dependencies up-to-date reduces technical debt and security vulnerabilities
+2. **Low Risk**: The upgrade requires no code changes due to:
+   - Already using ESM
+   - Already meeting Node.js version requirements
+   - Using only supported color formats
+3. **Future Maintenance**: Staying current makes future upgrades easier
+4. **Performance**: Newer versions include performance improvements and bug fixes
+
+## Consequences
+
+### Positive
+- Latest bug fixes and performance improvements
+- Better React 19 support
+- Reduced technical debt
+- Security patches included
+
+### Negative
+- Need to update related React types
+- Small risk of undocumented breaking changes
+- Need to test thoroughly
+
+### Neutral
+- No code changes required
+- Build process unchanged
+- API surface unchanged for our usage
+
+## Implementation
+
+1. Update `package.json`:
+   - `ink`: `^3.2.0` → `^6.3.1`
+   - `react`: `^18.2.0` → `^19.0.0`
+   - Add `@types/react`: `^19.0.0` to devDependencies
+
+2. Install and test:
+   - `npm install`
+   - `npm run build`
+   - `npm run test:e2e`
+
+3. Update CHANGELOG.md with the changes
+
+## Status
+
+- **Decided**: 2025-10-21
+- **Implemented**: Pending
+- **Decision Maker**: Development team following standard upgrade practices
diff --git a/spec/cli/proposals/u7k-upgrade-ink-v6/proposal.md b/spec/cli/proposals/u7k-upgrade-ink-v6/proposal.md
new file mode 100644
index 00000000..60def75e
--- /dev/null
+++ b/spec/cli/proposals/u7k-upgrade-ink-v6/proposal.md
@@ -0,0 +1,122 @@
+# Proposal u7k: Upgrade Ink to v6
+
+## Status
+- **Status**: Proposed
+- **Proposed**: 2025-10-21
+- **Type**: Enhancement
+- **Area**: CLI
+
+## Summary
+
+Upgrade the `ink` React CLI framework from v3.2.0 to v6.3.1 to get latest features, improvements, and security updates.
+
+## Motivation
+
+The current version of ink (v3.2.0) is significantly outdated. Upgrading to v6.3.1 provides:
+
+1. **Up-to-date dependencies**: Aligns with modern React (v19) and Node.js (v20+)
+2. **Bug fixes and improvements**: Three major versions of fixes and performance improvements
+3. **Better maintainability**: Staying current with dependencies reduces technical debt
+4. **Security**: Latest versions include security patches and updates
+
+## Current State
+
+- `ink`: ^3.2.0
+- `react`: ^18.2.0
+- Node.js requirement: >=22.0.0 (already meets v6 requirement)
+- Package type: ESM (already configured)
+
+## Proposed Changes
+
+### Dependencies
+
+Upgrade the following packages in `package.json`:
+
+```json
+{
+  "dependencies": {
+    "ink": "^6.3.1",
+    "react": "^19.0.0"
+  },
+  "devDependencies": {
+    "@types/react": "^19.0.0"
+  }
+}
+```
+
+### Breaking Changes to Address
+
+Based on ink release notes:
+
+#### v4.0.0 Breaking Changes
+1. **Pure ESM**: Package is now pure ESM (already using ESM with `"type": "module"`)
+2. **React 18**: Requires React 18+ (upgrading to React 19)
+3. **Color formats**: Removed support for hsl, hsv, hwb, and ansi color formats in `Text` component's `color` prop
+4. **react-devtools-core**: Moved to optional peer dependency (not used in this project)
+
+#### v5.0.0 Breaking Changes
+1. **Node.js 18**: Requires Node.js >= 18 (current requirement is >= 22, already met)
+
+#### v6.0.0 Breaking Changes
+1. **Node.js 20**: Requires Node.js >= 20 (current requirement is >= 22, already met)
+2. **React 19**: Requires React 19 (will upgrade)
+
+### Code Changes Required
+
+Need to verify that color props in `Text` components don't use deprecated formats:
+- Check all `color` props in:
+  - `src/cli/ui/components/EnhancedInput.ts`
+  - `src/cli/ui/components/SimpleInput.ts`
+  - `src/cli/utils/advanced-interactive-ui.ts` (if applicable)
+  - Any other files using ink components
+
+Current usage appears to use named colors (e.g., 'magenta', 'cyan', 'white') which are still supported.
+
+## Implementation Plan
+
+1. Update `package.json` dependencies
+2. Review code for deprecated color format usage
+3. Run `npm install` to update dependencies
+4. Run build to check for TypeScript/compilation errors
+5. Run e2e tests to verify functionality
+6. Update CHANGELOG.md
+
+## Testing Strategy
+
+1. **Build test**: `npm run build` should succeed without errors
+2. **Type check**: `npm run typecheck` should pass
+3. **E2E tests**: `npm run test:e2e:all` should pass
+4. **Manual testing**:
+   - Test `mew space connect` interactive mode
+   - Verify input components work correctly
+   - Check color rendering in terminal
+
+## Risks and Mitigations
+
+| Risk | Mitigation |
+|------|------------|
+| React 19 introduces breaking changes | Review React 19 migration guide and test thoroughly |
+| Color rendering changes | Verify all themed colors render correctly |
+| Input handling changes | Test all keyboard shortcuts and input modes |
+| Third-party compatibility | Check if any other dependencies conflict with React 19 |
+
+## Alternatives Considered
+
+1. **Stay on v3**: Keep current version
+   - Pros: No breaking changes to handle
+   - Cons: Missing updates, potential security issues, technical debt
+
+2. **Incremental upgrade**: Upgrade v3 → v4 → v5 → v6
+   - Pros: Smaller changes per step
+   - Cons: More work, same end result
+
+3. **Direct upgrade to v6**: (Selected)
+   - Pros: Single migration, immediate benefits
+   - Cons: More breaking changes at once
+
+## References
+
+- [Ink v4.0.0 Release](https://github.com/vadimdemedes/ink/releases/tag/v4.0.0)
+- [Ink v6.0.0 Release](https://github.com/vadimdemedes/ink/releases/tag/v6.0.0)
+- [Ink GitHub Repository](https://github.com/vadimdemedes/ink)
+- Current usage in MEW Protocol: `src/cli/ui/` directory
diff --git a/spec/cli/proposals/u7k-upgrade-ink-v6/research.md b/spec/cli/proposals/u7k-upgrade-ink-v6/research.md
new file mode 100644
index 00000000..3fb280f6
--- /dev/null
+++ b/spec/cli/proposals/u7k-upgrade-ink-v6/research.md
@@ -0,0 +1,99 @@
+# Research: Ink v6 Upgrade
+
+## Research Questions
+
+1. What are the breaking changes between ink v3 and v6?
+2. What are the breaking changes between React 18 and React 19?
+3. How is ink currently used in the MEW Protocol CLI?
+4. Are there any compatibility issues with other dependencies?
+
+## Findings
+
+### Ink Breaking Changes
+
+#### v3 → v4
+- **Pure ESM**: Package is now pure ESM
+  - MEW Protocol already uses ESM (`"type": "module"` in package.json)
+  - ✅ No action needed
+
+- **Node.js 14.16**: Minimum version requirement
+  - MEW Protocol requires Node.js >= 22.0.0
+  - ✅ Already exceeds requirement
+
+- **React 18**: Required React version
+  - Currently on React 18.2.0
+  - ✅ Compatible, will upgrade to React 19
+
+- **Color formats**: Removed hsl, hsv, hwb, ansi formats
+  - Need to audit current color usage
+  - MEW Protocol uses named colors (e.g., 'magenta', 'cyan')
+  - ✅ Should be compatible
+
+#### v4 → v5
+- **Node.js 18**: Minimum version bumped to 18
+  - MEW Protocol requires >= 22.0.0
+  - ✅ Already exceeds requirement
+
+#### v5 → v6
+- **Node.js 20**: Minimum version bumped to 20
+  - MEW Protocol requires >= 22.0.0
+  - ✅ Already exceeds requirement
+
+- **React 19**: Required React version
+  - Currently on React 18.2.0
+  - ⚠️ Need to upgrade React
+
+### React 18 → 19 Changes
+
+React 19 is the latest stable version. Key changes:
+- New JSX Transform (already in use since React 17)
+- Improved TypeScript support
+- Performance improvements
+- Minor breaking changes (mostly edge cases)
+
+### Current Ink Usage in MEW Protocol
+
+Files using ink:
+1. `src/cli/ui/components/EnhancedInput.ts`
+   - Uses: `Box`, `Text`, `useInput` (via custom hook)
+   - Colors: theme-based named colors
+
+2. `src/cli/ui/components/SimpleInput.ts`
+   - Uses: `Box`, `Text`, `useInput`
+   - Colors: named colors
+
+3. `src/cli/ui/hooks/useKeypress.ts`
+   - Uses: `useInput`
+   - Wraps ink's `useInput` hook
+
+4. `src/cli/utils/advanced-interactive-ui.ts`
+   - Large file, uses ink components extensively
+   - Need to audit for color usage
+
+### Color Usage Audit
+
+Searched for color props in ink components:
+- `color="magenta"` ✅
+- `color="cyan"` ✅
+- `color="white"` ✅
+- `color={theme?.colors?....}` ✅ (named colors from theme)
+- `borderColor="magenta"` ✅
+
+All colors are named colors or hex values, no deprecated formats detected.
+
+### Dependency Compatibility
+
+Current dependencies that might be affected:
+- `@types/react`: Currently not in package.json, should add `@types/react@^19.0.0`
+- Other packages seem to have no direct React dependency
+
+## Conclusion
+
+The upgrade path is clear:
+1. Update `ink` to `^6.3.1`
+2. Update `react` to `^19.0.0`
+3. Add `@types/react` to devDependencies
+4. No code changes required (colors are already compatible)
+5. Test thoroughly to ensure no regressions
+
+Risk level: **Low** - No significant code changes required, mainly dependency bumps.
diff --git a/src/cli/ui/components/EnhancedInput.ts b/src/cli/ui/components/EnhancedInput.ts
index 7f40725f..52b7ffae 100644
--- a/src/cli/ui/components/EnhancedInput.ts
+++ b/src/cli/ui/components/EnhancedInput.ts
@@ -45,7 +45,7 @@ function EnhancedInput({
   prompt = '> ',
   slashContext = null,
   theme = null
-}) {
+}): React.ReactElement {
   // Text buffer for managing input
   const bufferRef = useRef(new TextBuffer());
   const buffer = bufferRef.current;
diff --git a/src/cli/ui/components/SimpleInput.ts b/src/cli/ui/components/SimpleInput.ts
index baac757b..2a912ea2 100644
--- a/src/cli/ui/components/SimpleInput.ts
+++ b/src/cli/ui/components/SimpleInput.ts
@@ -6,7 +6,7 @@
 import React, { useState } from 'react';
 import { Box, Text, useInput } from 'ink';
 
-function SimpleInput({ onSubmit, disabled = false, prompt = '> ', theme = null }) {
+function SimpleInput({ onSubmit, disabled = false, prompt = '> ', theme = null }): React.ReactElement {
   const [value, setValue] = useState('');
 
   useInput((input, key) => {
diff --git a/src/cli/utils/advanced-interactive-ui.ts b/src/cli/utils/advanced-interactive-ui.ts
index 109020fc..106903e0 100644
--- a/src/cli/utils/advanced-interactive-ui.ts
+++ b/src/cli/utils/advanced-interactive-ui.ts
@@ -45,7 +45,7 @@ function createSignalBoardSummary(ackCount, statusCount, pauseState, includeAck
 /**
  * Main Advanced Interactive UI Component
  */
-function AdvancedInteractiveUI({ ws, participantId, spaceId, themeName = 'neon-pulse', defaultChatTargets = {} }) {
+function AdvancedInteractiveUI({ ws, participantId, spaceId, themeName = 'neon-pulse', defaultChatTargets = {} }): React.ReactElement | null {
   // Load theme
   const theme = getTheme(themeName);