On Windows, process.cwd() returns backslash paths (C:\Users\name\...).
When these paths are injected into system prompts, worktree context
blocks, or tool results, the model copies them into bash commands.
Bash interprets backslashes as escape characters, silently stripping
them — producing invalid paths like 'C:Usersnamedevelopmentapp-name'.
This is not a regex hack — it's a proper cross-platform boundary:
- Filesystem operations (fs, path.join, spawn cwd) use native paths
unchanged. Node handles both separators correctly for I/O.
- LLM-visible text (prompts, tool results, extension messages) uses
toPosixPath() to normalize to forward slashes. C:/Users/name/...
is valid in Git Bash, WSL bash, PowerShell, and Node.js.
Changes:
- utils/path-display.ts: New toPosixPath() utility in pi-coding-agent
package (for system prompt) and shared extension module (for
extensions that can't import from the compiled package at dev time)
- system-prompt.ts: Normalize resolvedCwd before injecting into the
'Current working directory' line
- gsd/index.ts: Normalize all process.cwd() and originalBase paths in
worktree context blocks injected into the system prompt
- bg-shell/index.ts: Normalize cwd in tool result text (start, env
actions) that the model reads and may reference in commands
- path-display.test.ts: 9 regression tests covering toPosixPath
behavior and system prompt output verification. Includes a scanner
that fails if any Windows absolute paths with backslashes appear in
buildSystemPrompt() output.
Audit scope: Checked all process.cwd() usage across pi-coding-agent
and all bundled extensions. Filesystem-only paths (join, readFile,
spawn cwd, existsSync) are correct and left unchanged. Only paths
entering LLM text are normalized.
3542b17c97