fix(installer): preserve symlinks when writing agent config files - #433
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@colbymchenry Can this PR be considered for merging? |
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atomicWriteFileSync used write-tmp-then-rename, which replaces the directory entry and breaks symlinks. Resolve symlinks to their real target path before writing so shared AGENTS.md / CLAUDE.md setups survive reinstall.
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Summary
atomicWriteFileSyncuses a write-tmp-then-rename pattern, which replaces the directory entry (inode) and breaks symlinksresolveSymlink()helper that checkslstatSync+isSymbolicLink()and resolves viarealpathSync(with manualreadlinkSyncfallback for dangling symlinks)atomicWriteFileSyncandremoveMarkedSectionnow resolve symlinks before writing/unlinking, so sharedAGENTS.mdCLAUDE.mdvia symlink survives reinstallMotivation
Users may share a single AGENTS.md across multiple agents via symlinks:
Previously, running
codegraph install --target claude,codex --yeswould replace these symlinks with regular files, breaking the shared setup. This fix ensures symlinks are followed and the real target file is written to.Test plan