PR: https://git.cafe/pingdotgg/t3code/pulls/26623
main: 616c426f5f (github/main)
PR head: ad839a7054d357757f2a59597819ffa7edae2cf6
Environment: Linux, Chrome /usr/bin/google-chrome, repo Playwright 1.60.0
Provider: real @zed-industries/codex-acp 0.16.0, configured via Settings > Providers > Local ACP command.
Project added via web client: /home/user/t3code (real git repository).
The provider's discovered catalog includes gpt-6.1-sol and excludes gpt-6-astra.
No mocks, replay provider, fixtures, or provider catalog overrides.

Main web/server ports: 8693/16733; stopped before starting PR.
PR web/server ports: 5733/13773; explicit isolated --home-dir /home/user/t3code/.t3.

Reproduction command (on main, then exact PR head; --base-dir selects each isolated server):
node apps/server/src/bin.ts thread start --base-dir <isolated-home> --provider acpRegistry_codex_acp_verification --model gpt-6-astra --title 'ACP unavailable explicit model' --wait --json /home/user/t3code 'Reply with exactly ACP_STALE_SELECTION_RAN. Do not use tools or change files.'

MAIN RESULT:
{"threadId":"mcp:bcde41fd-e047-49bf-97b2-71e687ae01db","runId":"run:thread:mcp%3Abcde41fd-e047-49bf-97b2-71e687ae01db:ordinal:1","status":"completed","reply":"Model metadata for `gpt-6.1-sol` not found. Defaulting to fallback metadata; this can degrade performance and cause issues.ACP_STALE_SELECTION_RAN","error":null}

PR RESULT:
{"threadId":"mcp:0c36e970-7553-439b-90c1-3bd87773022e","runId":"run:thread:mcp%3A0c36e970-7553-439b-90c1-3bd87773022e:ordinal:1","status":"failed","reply":null,"error":"The agent did not accept the model \"gpt-6-astra\". Choose another model for this provider, then retry."}
Thread mcp:0c36e970-7553-439b-90c1-3bd87773022e stopped with status failed: The agent did not accept the model "gpt-6-astra". Choose another model for this provider, then retry.

WEB RECOVERY: Opened failed thread in Chrome, clicked model picker, selected gpt-6.1-sol, typed 'Reply with exactly ACP_RECOVERY_OK. Do not use tools or change files.', clicked Submit message. Assistant replied ACP_RECOVERY_OK. Persisted state:
{"thread":{"threadId":"mcp:0c36e970-7553-439b-90c1-3bd87773022e","projectId":"a09132e3-d61e-4d01-97bc-a4dd7cd0da2a","title":"ACP unavailable explicit model","link":"http://127.0.0.1:13773/88576153-55f9-48a5-92c7-67972371124b/mcp%3A0c36e970-7553-439b-90c1-3bd87773022e","createdBy":"agent","creationSource":"mcp","status":"completed","latestRunId":"run:thread:mcp%3A0c36e970-7553-439b-90c1-3bd87773022e:ordinal:2","activeRunId":null,"providerInstanceId":"acpRegistry_codex_acp_verification","model":"gpt-6.1-sol","runtimeMode":"full-access","interactionMode":"default","linkedPullRequest":null,"pullRequests":[],"titleRegeneration":null,"branch":null,"worktreePath":null,"parentThreadId":null,"relationshipToParent":null,"runCount":2,"itemCount":6,"pendingRequestCount":0,"archived":false,"settled":false,"settledAt":null,"snoozed":false,"snoozedUntil":null,"createdAt":"2026-10-30T16:00:05.836Z","updatedAt":"2026-10-30T16:01:13.179Z"},"messages":[{"role":"user","runId":"run:thread:mcp%3A0c36e970-7553-439b-90c1-3bd87773022e:ordinal:1","text":"Reply with exactly ACP_STALE_SELECTION_RAN. Do not use tools or change files."},{"role":"user","runId":"run:thread:mcp%3A0c36e970-7553-439b-90c1-3bd87773022e:ordinal:2","text":"Reply with exactly ACP_RECOVERY_OK. Do not use tools or change files."},{"role":"assistant","runId":"run:thread:mcp%3A0c36e970-7553-439b-90c1-3bd87773022e:ordinal:2","text":"Model metadata for `gpt-6.1-sol` not found. Defaulting to fallback metadata; this can degrade performance and cause issues.ACP_RECOVERY_OK"}]}

NEIGHBOR: same thread start command with --model default and prompt requesting ACP_DEFAULT_OK:
{"threadId":"mcp:a43f7dce-be9b-4ae4-b08e-f7fee3e5e37e","runId":"run:thread:mcp%3Aa43f7dce-be9b-4ae4-b08e-f7fee3e5e37e:ordinal:1","status":"completed","reply":"Model metadata for `gpt-6.1-sol` not found. Defaulting to fallback metadata; this can degrade performance and cause issues.ACP_DEFAULT_OK","error":null}

NEIGHBOR: same thread start command with --model auto and prompt requesting ACP_AUTO_OK:
{"threadId":"mcp:f3f46710-0d6d-4b4b-bf5b-75a5236c487c","runId":"run:thread:mcp%3Af3f46710-0d6d-4b4b-bf5b-75a5236c487c:ordinal:1","status":"completed","reply":"Model metadata for `gpt-6.1-sol` not found. Defaulting to fallback metadata; this can degrade performance and cause issues.ACP_AUTO_OK","error":null}