Why git Says detected dubious ownership in repository — and How to Get Past It
An automation that ran fine yesterday suddenly dies on detected dubious ownership in repository. Here is what actually triggers it, the safe.directory fix, and how it differs from a real Permission denied.
Diagnosing invalid_request_error When You Pass an Image URL to the Claude API
When the Claude API rejects an image you passed via `source.type: url`, the root cause almost always lives in one of four buckets: scheme, MIME, size, or reachability. Here is the diagnostic order I use in production.
Why JSON.parse Fails on Claude API Streaming tool_use Arguments — and How to Fix It
When you stream a Claude API response with tool_use, calling JSON.parse on each input_json_delta throws SyntaxError. Here is the correct way to assemble partial_json fragments, plus disconnect handling.
When Claude Code's Bash Tool Hits Permission Denied on /tmp — A $HOME/repos Fallback Pattern
A practical look at why git clone inside Claude Code's sandboxed Bash sometimes fails with Permission denied on /tmp, and how a tiny $HOME/repos fallback keeps unattended schedules alive across four indie sites.
Fixing Garbled Japanese Files in Claude Code — Identifying Shift-JIS vs UTF-8 and Converting Safely
When the Read tool spits out characters like 縺ゅ＞縺ゅ＞ instead of Japanese, the file is almost always Shift-JIS or EUC-JP being misread as UTF-8. Here is a practical workflow to detect the real encoding and convert it for Claude Code, drawn from running a Japanese wallpaper app since 2014.
How I Stopped Claude Code's 'File has been modified since read' Error From Recurring
If Claude Code keeps tripping over 'File has been modified since read it' partway through a long session, the cause usually narrows down to three settings. Here is what actually worked in my own setup.
Recovering from Claude Code's 'Tool result could not be submitted'
What 'Tool result could not be submitted' really means in Claude Code, and the practical recovery steps I rely on after years of running indie apps with 50M+ downloads through it.
When Claude Code's Sequential Edits Cascade into Failure — Fixing 'old_string not found' and 'not unique' on the Same File
Run several Edits against the same file in one turn and the second or third one suddenly fails with 'not found' or 'not unique'. The cause is order-dependence inside a single context snapshot, and a Read + scoped patches usually rescue it.
When pip install Stops with externally-managed-environment in Cowork's Bash Sandbox — Three Patterns for PEP 668
Why pip install fails with externally-managed-environment in Cowork's Bash sandbox, and three practical fixes — --break-system-packages, venv, and pipx — written from real scheduled-task experience.
Designing a Model-Selection Fallback That Survives this model is currently unavailable on Claude API
The 'this model is currently unavailable' error from Claude API behaves nothing like a 529 Overloaded or a rate limit. After six months running it across six auto-publishing pipelines as an indie developer at Dolice, I'm sharing the failure conditions I observed and the per-request model-fallback implementation that ended my weekend firefighting.
Why Claude Code Breaks Your MDX Frontmatter With YAML Errors (and How to Fix It)
If you have ever let Claude Code mass-produce MDX articles, sooner or later your build dies with a cryptic YAML error. Nested double quotes, stray colons, comma-joined tag entries — here is what is actually happening and the five patterns I trust in production.
Claude Code Hook `command timed out`: Timeout Settings and Split-Execution Patterns That Actually Work
Fix Claude Code's `command timed out` hook failure without just bumping the timeout. Includes practical split-execution, detached background jobs, and a settings.json layout that keeps your session fast.