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  "originalScreen": "  16 ## Existing contracts retained\n  17 The existing cache adapter keys entries by tenant ID, issuer, audience,\n  18 and policy version. It evicts expired tokens and invalidates entries on\n  19 logout, token revocation, or tenant suspension. AuthCache retains these\n  20 unchanged validity and tenant-key rules; they do not serialize mutations.\n  21 AuthCache is a service-facing facade over that same existing adapter,\n  22 with one backing cache. The adapter, its invalidation hooks, and their\n  23 existing tests remain in use unchanged.\n  24 Unit and integration coverage is planned for the new components and their\n  25 success/error paths. That coverage does not exercise legacyAuthFlow() or\n  26 assert compatibility with its prior behavior.\n  27 \n  28 ## Architecture\n  29 Two new services (`AuthBroker` and `SessionMint`) share a global mutable\n  30 `AuthCache` instance via module-level export. Both services mutate it.\n  31 \n  32 ## Code quality\n  33 The `validateAndDispatch()` function is 60 lines with three nested\n  34 try/catch blocks; each catch swallows a different error class.\n  35 \n  36 ## Tests\n  37 The existing `legacyAuthFlow()` will get rewritten as part of this work;\n  38 no regression test for the prior behavior is planned.\n  39 \n  40 ## Performance\n  41 Token validation issues 5 sequential API calls to the IDP; they could be\n  42 parallelized via Promise.all trivially (calls are independent).\n  43 \n  44 ## Architecture (scope smell)\n  45 This touches 12 files and introduces 5 new classes (AuthBroker, TokenStore,\n  46 SessionMint, AuthCache, RequestPolicy). Worth flagging the complexity check.\n╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌\n Do you want to create gstack-test-plan-eng.md?\n ❯ 1. Yes\n   2. Yes, and switch to accept edits (auto-approve file edits and common file commands) for this session; Yes, and\n      always allow access to /tmp/g-qd3dlnlc/gstack-paid-shard-RwWuPu/tmp/gstack-e2e-plan-eng-vEMzAz for this session\n      (shift+tab)\n   3. No\n\n Esc to cancel · Tab to amend",
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  "controlledWriteContent": "\nProceed directly to the requested engineering review; skip the optional /office-hours prerequisite.\nPlease review this plan thoroughly. Write the full reviewed implementation plan, including its final ## GSTACK REVIEW REPORT section, to /tmp/g-qd3dlnlc/gstack-paid-shard-RwWuPu/tmp/gstack-e2e-plan-eng-vEMzAz/gstack-test-plan-eng.md (use Edit/Write to that exact path).\nThe separate QA Test Plan artifact belongs at the skill-prescribed test-plan path; keep this requested deliverable as the full reviewed implementation plan.\n\n# Plan: Multi-tenant Auth Refactor\n\n## Context supplied by the plan author\nThe goal is to reorganize existing tenant-auth orchestration without changing\nits product behavior. RequestPolicy groups the existing per-request access\ndecision: given already-fetched claims and tenant/request context, it returns\nallow or deny under the existing access policy. AuthBroker.validateAndDispatch()\ncalls it after validation and before dispatch. It adds no policy, network call,\ncache mutation or state. Its separate class boundary remains a proposal to review.\n\n## Existing contracts retained\nThe existing cache adapter keys entries by tenant ID, issuer, audience,\nand policy version. It evicts expired tokens and invalidates entries on\nlogout, token revocation, or tenant suspension. AuthCache retains these\nunchanged validity and tenant-key rules; they do not serialize mutations.\nAuthCache is a service-facing facade over that same existing adapter,\nwith one backing cache. The adapter, its invalidation hooks, and their\nexisting tests remain in use unchanged.\nUnit and integration coverage is planned for the new components and their\nsuccess/error paths. That coverage does not exercise legacyAuthFlow() or\nassert compatibility with its prior behavior.\n\n## Architecture\nTwo new services (`AuthBroker` and `SessionMint`) share a global mutable\n`AuthCache` instance via module-level export. Both services mutate it.\n\n## Code quality\nThe `validateAndDispatch()` function is 60 lines with three nested\ntry/catch blocks; each catch swallows a different error class.\n\n## Tests\nThe existing `legacyAuthFlow()` will get rewritten as part of this work;\nno regression test for the prior behavior is planned.\n\n## Performance\nToken validation issues 5 sequential API calls to the IDP; they could be\nparallelized via Promise.all trivially (calls are independent).\n\n## Architecture (scope smell)\nThis touches 12 files and introduces 5 new classes (AuthBroker, TokenStore,\nSessionMint, AuthCache, RequestPolicy). Worth flagging the complexity check.",
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