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A developer writing on Sept. 21, 2026, said he is replacing Claude Code with Pi as his main coding harness after accumulating frustrations with Claude Code’s IDE workflow, extension and frequent changes. The account is one user’s experience, not evidence of a broader migration; he says Pi has been smooth after initial setup and that he has already built extensions for his needs.
A longtime Claude Code user says he has replaced Anthropic’s coding harness with Pi as his primary development tool, describing a move prompted by accumulated workflow frustrations rather than a single failure. In a post published Sept. 21, 2026, the developer praised Pi’s minimalist approach and customizability, while making clear the account reflects his own use, not a measured trend among developers.
The author said Claude Code’s handling of AGENTS.md files became a symbol of a broader inconvenience: projects using that format required him to copy or symlink instructions between it and Claude Code’s CLAUDE.md format. He also described limits in the VS Code workflow he used. In his account, only one Claude Code session could connect to the IDE at a time, preventing other sessions from receiving selected text from the editor.
He said the official Claude Code VS Code extension addressed multi-tab use but had shortcomings of its own, including slash commands that did not work, no custom status line and subagent messages mixed into the main conversation. These are the author’s descriptions of his experience; the post does not establish how commonly other users encounter them or whether later versions have addressed them.
The writer also criticized what he characterized as rapid feature development without enough attention to stability, saying that, at the time he wrote, Claude Code had received 244 releases that year. He said more than three-quarters changed the system prompt or tool descriptions. He reported that Pi took some initial configuration, but that after the first few days it was smooth to use. He has written extensions for his own workflows and said he hopes to share them after cleanup.
A Personal Switch Over Workflow
The account highlights a choice developers can face as AI coding tools expand: a broader feature set may not suit users who prioritize a predictable workflow, control over customization and a tool that fits existing IDE habits. For this author, the friction of managing instructions and working across editor sessions outweighed the value of Claude Code’s newer features.
His experience also points to the appeal of open-source harnesses for users willing to configure or extend software themselves. The author said he built a Pi extension for one of his needs in about 20 minutes. That is an anecdote, not a like-for-like assessment of setup time, capability, cost or reliability across the two tools. The post does not report a change to Anthropic’s product plans or establish that other users are leaving.
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Why Claude Code Fell Short
The author said he had used Claude Code since it became available through the Claude Pro subscription more than a year earlier. He described the software as an important early example of AI-assisted development and said he still considered it a compelling product, despite choosing to stop using it as his main harness.
He connected his decision to everyday usability as well as product direction. In his view, Claude Code was adding features he did not need while changes to prompts and tool descriptions sometimes disrupted his setup or conflicted with project conventions. He also criticized what he saw as excessive instruction overhead, including a Bash tool description he estimated at nearly 3,000 tokens. The post offers his assessment; it does not independently verify the token count or quantify effects on performance or cost.
The writer said Anthropic announced support for AGENTS.md the day after he decided to leave, but that the change came too late to affect his decision. His post does not provide an announcement link or technical details about the feature, so the scope and availability of that support are not established by the account.
““For now, I’m leaving. I’m excited to lean more into Pi.””
— The author of the Sept. 21 post
How Broad Are These Complaints?
The post is a single developer’s account. It provides no survey, usage data or independent comparison showing how widespread the cited IDE problems are, how many users are switching to Pi, or whether Pi performs better for other projects. The author’s counts of releases and prompt-related changes are not accompanied by a release-by-release analysis.
It is also unclear from the source whether Anthropic’s reported AGENTS.md support had shipped, which users could access it, or whether it resolved the author’s concerns. The post does not compare pricing, model quality, security, maintenance or long-term reliability between the tools. Those questions should not be inferred from one user’s decision.
The author said he plans to clean up and share extensions he has built for his Pi setup. He also encouraged readers with similar frustrations to try an open-source coding harness, but offered that as personal advice rather than a prediction about adoption.
No broader product response or follow-up from Anthropic or the Pi project is included in the source. The next useful developments to watch are whether the author publishes his extensions and whether subsequent product updates address the specific workflow issues he described.
Key Questions
What is the news in “Goodbye Claude, Hello Pi”?
A developer says he is replacing Claude Code with Pi as his main coding harness. He published the decision and his reasons on Sept. 21, 2026.
Why did the author leave Claude Code?
He cited problems with instruction-file compatibility, IDE sessions and the VS Code extension, along with frequent changes he said sometimes disrupted his setup. These are his reported experiences, not a finding about all users.
What does the author say about Pi?
He said Pi required some initial setup, then felt smooth to use. He praised its minimalist approach and customizability and said he had built extensions for his workflows.
Does this show that developers are broadly switching to Pi?
No. The source is a single user’s account and gives no adoption figures or survey data showing a wider migration.
Did Anthropic add support for AGENTS.md?
The author said Anthropic announced support the day after he decided to leave. The post does not give technical details or confirm the feature’s release status or availability.
Source: caleb.software
