[Bug] large PDF causing failures of all subsequent prompts

Bug Description
Here's a concise bug report summary:

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Title: Claude Code enters persistent error state after failed PDF processing, breaking all subsequent requests

Summary:
After attempting to process a large PDF file (16.6MB) that failed with error 400 "Could not process PDF", Claude Code entered a corrupted state where ALL subsequent requests return the same PDF processing error - even for completely unrelated operations including images, slash commands, and plain text prompts.

Steps to Reproduce:

1. Attempt to read a large PDF file (~16.6MB) in Claude Code
2. Receive "Could not process PDF" error (400)
3. Send any subsequent prompt (image, text, command)
4. Observe: All requests now fail with same PDF error

Expected Behavior:

• After a failed file operation, subsequent requests should work normally
• Different file types (PNG images) should not trigger PDF processing errors
• System commands (/usage, /agents) should always function
• Error states should not persist across unrelated requests

Actual Behavior:
Every request after initial PDF failure returns:

API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"Could not process PDF"},"request_id":"req_..."}

This occurs even when:

• Using PNG images instead of PDFs
• Running slash commands (/usage, /agents, /sc:agent)
• Creating new agents
• Sending plain text without file attachments

Impact:
Session becomes completely unusable - requires full restart to recover functionality.

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Environment Info

• Platform: darwin
• Terminal: vscode
• Version: 2.0.76
• Feedback ID:

Errors

[{"error":"Error: Plugin hook \"node \"/Users/sachin/.claude/plugins/cache/thedotmack/claude-mem/7.2.3/scripts/user-message-hook.js\"\" failed with exit code 3\nstderr: 📝 Claude-Mem Context Loaded\n   ℹ️  Note: This appears as stderr but is informational only\n\n\n\^[[1m\^[[36m[B4_mfd] recent context\^[[0m\n\^[[90m────────────────────────────────────────────────────────────\^[[0m\n\n\^[[2mLegend: 🎯 session-request | 🔴 bugfix | 🟣 feature | 🔄 refactor | ✅ change | 🔵 discovery | ⚖️  decision\^[[0m\n\n\^[[1m💡 Column Key\^[[0m\n\^[[2m  Read: Tokens to read this observation (cost to learn it now)\^[[0m\n\^[[2m  Work: Tokens spent on work that produced this record (🔍 research, 🛠️ building, ⚖️  deciding)\^[[0m\n\n\^[[2m💡 Context Index: This semantic index (titles, types, files, tokens) is usually sufficient to understand past work.\^[[0m\n\n\^[[2mWhen you need implementation details, rationale, or debugging context:\^[[0m\n\^[[2m  - Use the mem-search skill to fetch full observations on-demand\^[[0m\n\^[[2m  - Critical types (🔴 bugfix, ⚖️ decision) often need detailed fetching\^[[0m\n\^[[2m  - Trust this index over re-reading code for past decisions and learnings\^[[0m\n\n\^[[1m\^[[36m📊 Context Economics\^[[0m\n\^[[2m  Loading: 50 observations (14,325 tokens to read)\^[[0m\n\^[[2m  Work investment: 228,507 tokens spent on research, building, and decisions\^[[0m\n\^[[32m  Your savings: 214,182 tokens (94% reduction from reuse)\^[[0m\n\n\^[[1m\^[[36mDec 21, 2025\^[[0m\n\n🎯 \^[[33m#S13\^[[0m Fix simulation not starting and infinite loop crash in ProcessFlowDiagram causing dashboard errors (Dec 21 at 7:21 PM)\n\n🎯 \^[[33m#S14\^[[0m Fix infinite loop error in ProcessFlowDiagram causing Dashboard crash with \"Maximum update depth exceeded\" (Dec 21 at 7:28 PM)\n\n\^[[2mGeneral\^[[0m\n  \^[[2m#178\^[[0m  \^[[2m7:35 PM\^[[0m  ✅  Dev Server Responding with HTTP 200 OK \^[[2m(~197t)\^[[0m \^[[2m(🛠️ 507t)\^[[0m\n\n🎯 \^[[33m#S15\^[[0m User requested to make warehouse floor plan more realistic to match actual layout image showing manual picking (left) and LB/PTL sortation/packing (right) (Dec 21 at 7:35 PM)\n\n🎯 \^[[33m#S16\^[[0m User attempted to share an image that was too large to process (Dec 21 at 7:38 PM)\n\n🎯 \^[[33m#S17\^[[0m User inquiry about Claude's image size limits resulted in image-too-large error (Dec 21 at 7:40 PM)\n\n\^[[2mGeneral\^[[0m\n  \^[[2m#179\^[[0m  \^[[2m7:41 PM\^[[0m  🔵  Claude Image Size Limit Inquiry \^[[2m(~176t)\^[[0m \^[[2m(🔍 1,289t)\^[[0m\n\n🎯 \^[[33m#S18\^[[0m Redesign warehouse floor plan to match actual B4 warehouse layout with realistic equipment visualization (Dec 21 at 7:41 PM)\n\n\^[[1m\^[[36mDec 22, 2025\^[[0m\n\n\^[[2mGeneral\^[[0m\n  \^[[2m#180\^[[0m  \^[[2m12:01 AM\^[[0m  🔵  Warehouse Component Structure Identified \^[[2m(~212t)\^[[0m \^[[2m(🔍 318t)\^[[0m\n  \^[[2m#181\^[[0m            🔵  WarehouseView Component Architecture and Equipment Monitoring \^[[2m(~376t)\^[[0m \^[[2m(🔍 2,065t)\^[[0m\n  \^[[2m#182\^[[0m            🔵  FloorPlan SVG Visualization with Animated Equipment Flow \^[[2m(~491t)\^[[0m \^[[2m(🔍 5,539t)\^[[0m\n\n\^[[2msrc/components/warehouse/FloorPlan.tsx\^[[0m\n  \^[[2m#183\^[[0m  \^[[2m12:02 AM\^[[0m  🔄  Redesigned FloorPlan to Realistic Warehouse Layout \^[[2m(~603t)\^[[0m \^[[2m(🛠️ 32,644t)\^[[0m\n\n🎯 \^[[33m#S19\^[[0m Corrected HSL loop geometry from oval to rectangular shape to match MFD and engineering layout documentation (Dec 22 at 12:03 AM)\n\n\^[[2mGeneral\^[[0m\n  \^[[2m#184\^[[0m  \^[[2m12:06 AM\^[[0m  🔵  HSL Loop Geometry Correction Required \^[[2m(~235t)\^[[0m \^[[2m(🔍 1,315t)\^[[0m\n\n\^[[2msrc/components/warehouse/FloorPlan.tsx\^[[0m\n  \^[[2m#185\^[[0m  \^[[2m12:08 AM\^[[0m  🔴  HSL Loop Geometry Changed from Oval to Rectangular \^[[2m(~470t)\^[[0m \u

Note: Error logs were truncated.