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fix: use 0o666 mode for ~/.claude.json to fix permissions #852

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Merged
lpcox merged 2 commits into from
Feb 14, 2026
Merged

fix: use 0o666 mode for ~/.claude.json to fix permissions #852

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Claude Feb 14, 2026
62f9fd4
fix: use 0o666 mode for ~/.claude.json to fix permissions
Claude Feb 14, 2026
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4 changes: 3 additions & 1 deletion src/docker-manager.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -560,7 +560,9 @@ export function generateDockerCompose(
fs.mkdirSync(parentDir, { recursive: true, mode: 0o755 });
}
// Create empty file that will be populated by entrypoint
fs.writeFileSync(claudeJsonPath, '{}', { mode: 0o600 });
// Use 0o666 mode to allow container root to write and host user to read
// The entrypoint script runs as root and modifies this file
fs.writeFileSync(claudeJsonPath, '{}', { mode: 0o666 });
Comment on lines +563 to +565

Copilot AI Feb 14, 2026

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The entrypoint script sets chmod 600 on this file after writing to it (containers/agent/entrypoint.sh:153 and :160). This will make the file owned by root with 600 permissions, which will prevent the host user from reading it.

To fix this, the entrypoint script should either:

  1. Set chmod 644 instead of chmod 600 to allow read access
  2. Or use chmod a+r to add read permissions for all users

The current approach of setting 0o666 here won't work because the entrypoint script's chmod command will override these permissions.

Suggested change
// Use 0o666 mode to allow container root to write and host user to read
// The entrypoint script runs as root and modifies this file
fs.writeFileSync(claudeJsonPath, '{}', { mode: 0o666 });
// The entrypoint script runs as root, writes to this file, and sets restrictive permissions
// Use 0o600 here to align with the entrypoint's chmod behavior
fs.writeFileSync(claudeJsonPath, '{}', { mode: 0o600 });

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logger.debug(`Created ${claudeJsonPath} for chroot mounting`);
}
agentVolumes.push(`${claudeJsonPath}:/host${claudeJsonPath}:rw`);
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