### Summary
Temporary workaround for non-deterministic PATH handling when using
`coder_env` across multiple modules
([coder/coder#21885](https://github.com/coder/coder/issues/21885)).
### Problem
When multiple modules define `coder_env` with the same `name` (e.g.,
`PATH`), the final value is non-deterministic due to Go map iteration
order. This caused PATH overwrites instead of appending, breaking Claude
Code discovery in workspaces using multiple modules.
### Solution
Replace `coder_env` PATH manipulation with script-based PATH handling:
- **Install script**: Exports PATH and adds claude binary directory to
shell profiles (`.profile`, `.bashrc`, `.zshrc`, fish) for interactive
shell access
- **Start script**: Exports PATH at script execution time
- **Symlink**: Creates symlink in `CODER_SCRIPT_BIN_DIR` as additional
fallback
- **Validation**: Prevents invalid configuration where
`claude_binary_path` is customized but `install_claude_code=true`
(official installer doesn't support custom paths)
### Changes
- Removed `coder_env` resource for PATH
- Added PATH export to `install.sh` and `start.sh`
- Added shell profile modifications for cross-shell compatibility (bash,
zsh, fish)
- Added variable validation for `claude_binary_path`
### Note
This is a temporary fix until
[coder/coder#21885](https://github.com/coder/coder/issues/21885) is
resolved with a proper `merge_strategy` attribute for `coder_env`.
## Type of Change
- [ ] New module
- [ ] New template
- [X] Bug fix
- [ ] Feature/enhancement
- [ ] Documentation
- [ ] Other
## Module Information
<!-- Delete this section if not applicable -->
**Path:** `registry/coder/modules/claude-code`
**New version:** `v4.7.5`
**Breaking change:** [ ] Yes [X] No
## Testing & Validation
- [X] Tests pass (`bun test`)
- [X] Code formatted (`bun fmt`)
- [X] Changes tested locally
## Related Issues
([coder/coder#21885](https://github.com/coder/coder/issues/21885))
## Description
At the moment, the `CLAUDE_API_KEY` coder_env will always be created,
even if the variable itself is not. This can lead to the environment
variable being unset if it has been set outside of Terraform.
With this PR, we make the `claude_api_key` coder_env conditional, so it
will only be created if an API key has been set.
## Type of Change
- [ ] New module
- [ ] New template
- [x] Bug fix
- [ ] Feature/enhancement
- [ ] Documentation
- [ ] Other
## Module Information
<!-- Delete this section if not applicable -->
**Path:** `registry/coder/modules/claude-code/main.tf`
**New version:** `v4.7.4`
**Breaking change:** [ ] Yes [x] No
## Testing & Validation
- [x] Tests pass (`bun test`)
- [x] Code formatted (`bun fmt`)
- [x] Changes tested locally
## Related Issues
None
---------
Co-authored-by: 35C4n0r <70096901+35C4n0r@users.noreply.github.com>
