Repair a Claude Code session whose transcript JSONL has assistant messages containing a whitespace-only text block (typically {"type":"text","text":" "}), causing every API call (including new prompts, /compact, and claude --resume) to fail with HTTP 400 "messages: text content blocks must contain non-whitespace text". Use when: (1) a session refuses to accept new input with that exact 400, (2) /compact fails with the same 400 (since compact replays the full history first — it does NOT bypass the validator), (3) claude --resume immediately exits with the same error. Covers diagnosis via JSON-walking the message.content array (NOT plain grep — the empty block is often nested), the distinction between message.content (sent to API → must fix) and toolUseResult (local metadata → harmless, leave alone), the underlying cause (extended-thinking turn serialization emits a synthetic single-space placeholder before the thinking block), and an idempotent fixer script that replaces " " with "." while preserving message shape.
Install with
Claude CodeCodexCursorGitHub CopilotGemini CLI
Supported by the Atlas install prompt. Skill-specific requirements vary.
Skill stats
Skills1CategoryContent & writingStars0
About this skill
Repair a Claude Code session whose transcript JSONL has assistant messages containing a whitespace-only text block (typically {"type":"text","text":" "}), causing every API call (including new prompts, /compact, and claude --resume) to fail with HTTP 400 "messages: text content blocks must contain non-whitespace text". Use when: (1) a session refuses to accept new input with that exact 400, (2) /compact fails with the same 400 (since compact replays the full history first — it does NOT bypass the validator), (3) claude --resume immediately exits with the same error. Covers diagnosis via JSON-walking the message.content array (NOT plain grep — the empty block is often nested), the distinction between message.content (sent to API → must fix) and toolUseResult (local metadata → harmless, leave alone), the underlying cause (extended-thinking turn serialization emits a synthetic single-space placeholder before the thinking block), and an idempotent fixer script that replaces " " with "." while preserving message shape.
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Repair a Claude Code session whose transcript JSONL has assistant messages containing a whitespace-only text block (typically `{"type":"text","text":" "}`), causing every API call (including new prompts, `/compact`, and `claude --resume`) to fail with HTTP 400 "messages: text content blocks must contain non-whitespace text". Use when: (1) a session refuses to accept new input with that exact 400, (2) `/compact` fails with the same 400 (since compact replays the full history first — it does NOT bypass the validator), (3) `claude --resume <id>` immediately exits with the same error. Covers diagnosis via JSON-walking the message.content array (NOT plain grep — the empty block is often nested), the distinction between message.content (sent to API → must fix) and toolUseResult (local metadata → harmless, leave alone), the underlying cause (extended-thinking turn serialization emits a synthetic single-space placeholder before the thinking block), and an idempotent fixer script that replaces " " with "." while preserving message shape.
About this listing
Category
Content & writing
Reported license
MIT
Listing language (estimated)
English
Review status
Not individually reviewed
Agent compatibility
Atlas installation supports Claude Code, Codex, and Cursor. Skill-specific dependencies and features are checked during setup.
Claude Code
Codex
Cursor
GitHub Copilot
Gemini CLI