[Bug] Anthropic API Error: Extra usage required for Sonnet 4.6 1M context on Max x20 plan

Bug Description
⏺ Skill(pipeline-ui-reviewer)
⎿  Successfully loaded skill · claude-sonnet-4-6
⎿  API Error: Extra usage is required for 1M context · run /extra-usage to enable,
or /model to switch to standard context

max x20 plan, but suddenly requested with extra usage but

Expected behavior
Sonnet 4.6 with 1M context should be available on Max x20 plan per the GA announcement
(March 13, 2026).

Environment Info

• Platform: darwin
• Terminal: ghostty
• Version: 2.1.111
• Feedback ID: 017000bb-eb90-4ee1-b3c9-76b75e72fc64

Errors

[{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/dannywayne/.local/share/claude/versions/2.1.111 (expected in multi-process scenarios)\n    at Kd_ (/$bunfs/root/src/entrypoints/cli.js:2748:2177)\n    at qe6 (/$bunfs/root/src/entrypoints/cli.js:2748:1257)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-16T15:59:33.458Z"},{"error":"Error: ECONNREFUSED\n    at from (/$bunfs/root/src/entrypoints/cli.js:107:7862)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:115:12917)\n    at emitError (node:events:43:23)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:114:1149)\n    at emitError (node:events:43:23)\n    at <anonymous> (node:_http_client:253:22)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-16T15:59:48.482Z"},{"error":"Error: ECONNREFUSED\n    at from (/$bunfs/root/src/entrypoints/cli.js:107:7862)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:115:12917)\n    at emitError (node:events:43:23)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:114:1149)\n    at emitError (node:events:43:23)\n    at <anonymous> (node:_http_client:253:22)\n    at processTicksAndRejections (native:7:39)\n    at request (/$bunfs/root/src/entrypoints/cli.js:117:2467)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-16T16:02:52.764Z"},{"error":"Error: Request was aborted.\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:50:3448)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-16T16:05:21.670Z"},{"error":"Error: ECONNREFUSED\n    at from (/$bunfs/root/src/entrypoints/cli.js:107:7862)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:115:12917)\n    at emitError (node:events:43:23)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:114:1149)\n    at emitError (node:events:43:23)\n    at <anonymous> (node:_http_client:253:22)\n    at processTicksAndRejections (native:7:39)\n    at request (/$bunfs/root/src/entrypoints/cli.js:117:2467)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-16T16:05:22.628Z"},{"error":"Error: ECONNREFUSED\n    at from (/$bunfs/root/src/entrypoints/cli.js:107:7862)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:115:12917)\n    at emitError (node:events:43:23)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:114:1149)\n    at emitError (node:events:43:23)\n    at <anonymous> (node:_http_client:253:22)\n    at processTicksAndRejections (native:7:39)\n    at request (/$bunfs/root/src/entrypoints/cli.js:117:2467)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-16T16:06:32.876Z"},{"error":"Error: ECONNREFUSED\n    at from (/$bunfs/root/src/entrypoints/cli.js:107:7862)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:115:12917)\n    at emitError (node:events:43:23)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:114:1149)\n    at emitError (node:events:43:23)\n    at <anonymous> (node:_http_client:253:22)\n    at processTicksAndRejections (native:7:39)\n    at request (/$bunfs/root/src/entrypoints/cli.js:117:2467)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-16T16:07:23.959Z"},{"error":"Error: Was there a typo in the url or port?\n    at from (/$bunfs/root/src/entrypoints/cli.js:107:7862)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:115:12917)\n    at emitError (node:events:43:23)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:114:1149)\n    at emitError (node:events:43:23)\n    at <anonymous> (node:_http_client:253:22)\n    at processTicksAndRejections (native:7:39)\n    at request (/$bunfs/root/src/entrypoints/cli.js:117:2467)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-16T16:07:46.845Z"},{"error":"Error: ECONNREFUSED\n    at from (/$bunfs/root/src/entrypoints/cli.js:107:7862)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:115:12917)\n    at emitError (node:events:43:23)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:114:1149)\n    at emitError (node:events:43:23)\n    at <anonymous> (node:_http_client:253:22)\n    at…

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