[Bug] Unexpected High Token Usage on Simple Context-Only Queries

Bug Description
I just ask 3 questions this morning without using any plugin/mcp or whatever. The question was only using the current context to answer. it uses almost 40% of my max (100$) subscription of Claude. Can you tell me why ?

Environment Info

• Platform: darwin
• Terminal: vscode
• Version: 2.1.104
• Feedback ID: 4708b132-baea-4a57-99a0-ea1c86bed4bc

Errors

[{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/arnaud.altenburger/.local/share/claude/versions/2.1.104 (expected in multi-process scenarios)\n    at Tc_ (/$bunfs/root/src/entrypoints/cli.js:2836:2153)\n    at Se6 (/$bunfs/root/src/entrypoints/cli.js:2836:1233)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-13T16:34:55.249Z"},{"error":"Error: Failed to fetch version from https://storage.googleapis.com/claude-code-dist-86c565f3-f756-42ad-8dfa-d59b1c096819/claude-code-releases/latest: Request failed with status code 429\n    at EU1 (/$bunfs/root/src/entrypoints/cli.js:2834:5253)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-13T21:53:16.696Z"},{"error":"Error: Failed to fetch version from https://storage.googleapis.com/claude-code-dist-86c565f3-f756-42ad-8dfa-d59b1c096819/claude-code-releases/latest: Request failed with status code 429\n    at EU1 (/$bunfs/root/src/entrypoints/cli.js:2834:5253)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-13T21:53:16.696Z"},{"error":"Error: Tool TodoWrite not found\n    at Rq7 (/$bunfs/root/src/entrypoints/cli.js:2909:30089)\n    at w$ (/$bunfs/root/src/entrypoints/cli.js:472:21015)\n    at TA (/$bunfs/root/src/entrypoints/cli.js:472:39568)\n    at Ei (/$bunfs/root/src/entrypoints/cli.js:472:50273)\n    at fmH (/$bunfs/root/src/entrypoints/cli.js:472:86970)\n    at $OH (/$bunfs/root/src/entrypoints/cli.js:472:85933)\n    at TOH (/$bunfs/root/src/entrypoints/cli.js:472:85755)\n    at hO_ (/$bunfs/root/src/entrypoints/cli.js:472:82107)\n    at EH (/$bunfs/root/src/entrypoints/cli.js:472:6499)\n    at FH (/$bunfs/root/src/entrypoints/cli.js:472:4981)","timestamp":"2026-04-14T07:53:35.430Z"},{"error":"Error: Tool TodoWrite not found\n    at Rq7 (/$bunfs/root/src/entrypoints/cli.js:2909:30089)\n    at w$ (/$bunfs/root/src/entrypoints/cli.js:472:21015)\n    at TA (/$bunfs/root/src/entrypoints/cli.js:472:39568)\n    at Ei (/$bunfs/root/src/entrypoints/cli.js:472:50273)\n    at fmH (/$bunfs/root/src/entrypoints/cli.js:472:86970)\n    at $OH (/$bunfs/root/src/entrypoints/cli.js:472:85933)\n    at TOH (/$bunfs/root/src/entrypoints/cli.js:472:85755)\n    at hO_ (/$bunfs/root/src/entrypoints/cli.js:472:82107)\n    at EH (/$bunfs/root/src/entrypoints/cli.js:472:6499)\n    at FH (/$bunfs/root/src/entrypoints/cli.js:472:4981)","timestamp":"2026-04-14T07:53:35.433Z"},{"error":"Error: Tool TodoWrite not found\n    at Rq7 (/$bunfs/root/src/entrypoints/cli.js:2909:30089)\n    at w$ (/$bunfs/root/src/entrypoints/cli.js:472:21015)\n    at TA (/$bunfs/root/src/entrypoints/cli.js:472:39568)\n    at Ei (/$bunfs/root/src/entrypoints/cli.js:472:50273)\n    at fmH (/$bunfs/root/src/entrypoints/cli.js:472:86970)\n    at $OH (/$bunfs/root/src/entrypoints/cli.js:472:85933)\n    at TOH (/$bunfs/root/src/entrypoints/cli.js:472:85755)\n    at hO_ (/$bunfs/root/src/entrypoints/cli.js:472:82107)\n    at EH (/$bunfs/root/src/entrypoints/cli.js:472:6499)\n    at FH (/$bunfs/root/src/entrypoints/cli.js:472:4981)","timestamp":"2026-04-14T07:53:35.453Z"},{"error":"Error: Tool TodoWrite not found\n    at Rq7 (/$bunfs/root/src/entrypoints/cli.js:2909:30089)\n    at w$ (/$bunfs/root/src/entrypoints/cli.js:472:21015)\n    at TA (/$bunfs/root/src/entrypoints/cli.js:472:39568)\n    at Ei (/$bunfs/root/src/entrypoints/cli.js:472:50273)\n    at fmH (/$bunfs/root/src/entrypoints/cli.js:472:86970)\n    at $OH (/$bunfs/root/src/entrypoints/cli.js:472:85933)\n    at TOH (/$bunfs/root/src/entrypoints/cli.js:472:85755)\n    at hO_ (/$bunfs/root/src/entrypoints/cli.js:472:82107)\n    at EH (/$bunfs/root/src/entrypoints/cli.js:472:6499)\n    at FH (/$bunfs/root/src/entrypoints/cli.js:472:4981)","timestamp":"2026-04-14T07:53:35.468Z"},{"error":"Error: Tool mcp__claude_ai_Notion__notion-search not found\n    at Rq7 (/$bunfs/root/src/entrypoints/cli.js:2909:30089)\n    at w$ (/$bunfs/root/src/entrypoints/cli.js:472:21015)\n    at TA (/$bunfs/root/src/entrypoints/cli.js:472:39568)\n    at Ei (/$bunfs/root/src/entrypoints/cli.js:472:50273)\n    at fmH (/$bunfs/root/src/entrypoints/cli.js:472:86970)\n    at $OH (/$bunfs/root/src/entrypoints/cli.js:472:85933)\n    at TOH (/$bunfs/root/src/entrypoints/cli.js:472:85755)\n    at hO_ (/$bunfs/root/src/entrypoints/cli.js:472:82107)\n    at EH (/$bunfs/root/src/entrypoints/cli.j…

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