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Cian Johnston

PROFILE

Cian Johnston

Over a three-month period, this developer enhanced deployment flexibility and configuration integrity across multiple repositories. In coder/vscode-coder, they improved SSH configuration management by adding robust validation for malformed files and implementing atomic file saves to prevent data loss, using Node.js and TypeScript for error handling and file system operations. For coder/agentapi, they enabled subpath deployment by refining base path and URL handling, supporting integration with reverse proxies. In coder/registry, they delivered configurable subdomain support for AgentAPI, updating Terraform-based infrastructure and extending module configuration. Their work emphasized stability, test coverage, and seamless integration with existing deployment environments.

Overall Statistics

Feature vs Bugs

67%Features

Repository Contributions

4Total
Bugs
1
Commits
4
Features
2
Lines of code
810
Activity Months3

Work History

August 2025

2 Commits • 1 Features

Aug 1, 2025

August 2025 monthly work summary for coder/registry: Delivered configurable AgentAPI subdomain support and related tests, updated compatibility version, and ensured propagation of subdomain settings across modules. No major bugs fixed this period; focused on stability, configurability, and testing coverage. Business value includes improved multi-tenant routing, easier deployment, and reduced risk of misrouting across subdomains.

July 2025

1 Commits • 1 Features

Jul 1, 2025

July 2025 focused on enabling subpath deployment for the Agent API to improve deployment flexibility and integration options. Delivered changes to run coder/agentapi under a subpath by correctly configuring base path and URL construction, laying groundwork for smoother hosting with reverse proxies and multi-tenant deployments.

May 2025

1 Commits

May 1, 2025

Monthly summary for May 2025: Focused on strengthening SSH config integrity and safe file saving in coder/vscode-coder. Delivered robust validation to detect malformed SSH config files and enforce correct start/end blocks, added explicit errors to prevent misconfigurations, and implemented atomic saves that preserve original file permissions by writing to a temporary file before atomic replacement. These changes reduce data loss risk, improve reliability of SSH-based workflows, and enhance user trust in development environments.

Activity

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Quality Metrics

Correctness95.0%
Maintainability90.0%
Architecture90.0%
Performance85.0%
AI Usage20.0%

Skills & Technologies

Programming Languages

GoHCLJavaScriptMakefileShellTerraformTypeScript

Technical Skills

API IntegrationBackend DevelopmentConfiguration ManagementError HandlingFile System OperationsFrontend DevelopmentInfrastructure as CodeModule DevelopmentNode.jsTerraformTestingURL HandlingUnit Testing

Repositories Contributed To

3 repos

Overview of all repositories you've contributed to across your timeline

coder/registry

Aug 2025 Aug 2025
1 Month active

Languages Used

HCLJavaScriptShellTerraformTypeScript

Technical Skills

API IntegrationConfiguration ManagementInfrastructure as CodeModule DevelopmentTerraformTesting

coder/vscode-coder

May 2025 May 2025
1 Month active

Languages Used

JavaScriptTypeScript

Technical Skills

Configuration ManagementError HandlingFile System OperationsNode.jsUnit Testing

coder/agentapi

Jul 2025 Jul 2025
1 Month active

Languages Used

GoMakefileTypeScript

Technical Skills

Backend DevelopmentConfiguration ManagementFrontend DevelopmentURL Handling