Fix example for editing front matter fields in patch_vault_file #22
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Fix example for editing front matter fields
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jacksteamdev
approved these changes
Jul 13, 2025
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Fix example for editing front matter fields, hoping that Claude will then understand the patch_vault_file tool properly.
I was using the
patch_vault_filetool from Claude desktop and got errors like this:Message from client:
{ "method": "tools/call", "params": { "name": "patch_vault_file", "arguments": { "content": "remote_possible: \"Remote-Optionen möglich\"\nurl: https://jobs.biontech.com/job/Mainz-HR-Data-Analyst-Scientist-%28mwd%29-RP-55116/1202835801/", "filename": "Jobs/BioNTech - HR Data Analyst Scientist.md", "operation": "replace", "target": "remote_possible: \"Remote-Optionen möglichurl:\n https://jobs.biontech.com/job/Mainz-HR-Data-Analyst-Scientist-%28mwd%29-RP-55\\\n 116/1202835801/\"", "targetType": "frontmatter" } }, "jsonrpc": "2.0", "id": 52 }Message from server:
{ "jsonrpc": "2.0", "id": 52, "error": { "code": -32603, "message": "MCP error -32603: Header 'Target' has invalid value: 'remote_possible: \"Remote-Optionen möglichurl:\n https://jobs.biontech.com/job/Mainz-HR-Data-Analyst-Scientist-%28mwd%29-RP-55\\\n 116/1202835801/\"'" } }Here it should replace only a single frontmatter field and somehow includes multiple lines.
I have given Claude extra instructions with the (fixed) example from openapi.yaml and that fixed the problem.
I didn't bother to make this problem reproducible, sorry.