percy/cli
Feb 2025 – Apr 2026
8 Months active
Languages Used
GoJavaScriptShellYAMLJSON
Technical Skills
Backend DevelopmentCLI DevelopmentConfiguration ManagementDebuggingGoJavaScript
Shivanshu Singh
PROFILE
Shivanshu Singh
Shivanshu Si worked extensively on the percy/cli repository, delivering features and fixes that improved reliability, security, and release management for the CLI tool. Over eight months, Shivanshu enhanced DOM serialization, implemented resource payload size guardrails, and introduced utilities to prevent prototype pollution, using JavaScript and Go to address both backend and frontend concerns. He stabilized CI workflows with GitHub Actions, resolved flaky tests across platforms, and refined release processes through disciplined version control and packaging updates. His work demonstrated depth in debugging, configuration management, and testing, resulting in a more robust, secure, and maintainable CLI for downstream users.
Overall Statistics
Feature vs Bugs
60%Features
Repository Contributions
17Total
Bugs
6
Commits
17
Features
9
Lines of code
1,871
Activity Months8
Your Network
47 peopleSame Organization
@browserstack.com31
Work History
April 2026
1 Commits
Apr 1, 2026April 2026 (2026-04): Focused on stabilizing Percy CLI CI, improving cross-platform reliability, and delivering deterministic test outcomes to accelerate feedback. Implemented a targeted set of fixes to eliminate flaky tests on Windows/Firefox and hardened timing and synchronization in the test harness. Result: fewer CI flakes, faster release cycles, and more trustworthy test signals for developers and product teams.
1 Commits
Apr 1, 2026April 2026 (2026-04): Focused on stabilizing Percy CLI CI, improving cross-platform reliability, and delivering deterministic test outcomes to accelerate feedback. Implemented a targeted set of fixes to eliminate flaky tests on Windows/Firefox and hardened timing and synchronization in the test harness. Result: fewer CI flakes, faster release cycles, and more trustworthy test signals for developers and product teams.
April 2026
January 2026
1 Commits • 1 Features
Jan 1, 2026Month: 2026-01 — Percy CLI (percy/cli) focused on beta release preparation and establishing a stable pre-release workflow. Key work: version bump to 1.31.9-beta.0 and publish tag set to beta for pre-release testing; related work captured in Release 1.31.9-beta.0 (#2096).
January 2026
1 Commits • 1 Features
Jan 1, 2026Month: 2026-01 — Percy CLI (percy/cli) focused on beta release preparation and establishing a stable pre-release workflow. Key work: version bump to 1.31.9-beta.0 and publish tag set to beta for pre-release testing; related work captured in Release 1.31.9-beta.0 (#2096).
November 2025
2 Commits • 1 Features
Nov 1, 2025Monthly performance summary for 2025-11 focusing on Percy CLI improvements, bug fixes, and release readiness. Delivered a bug fix for canvas maxWidth resizing affecting image serialization, and prepared beta release with version tagging to enable pre-release testing and gather early feedback. These efforts improve stability, accelerate feedback loops, and set the stage for reliable production releases.
2 Commits • 1 Features
Nov 1, 2025Monthly performance summary for 2025-11 focusing on Percy CLI improvements, bug fixes, and release readiness. Delivered a bug fix for canvas maxWidth resizing affecting image serialization, and prepared beta release with version tagging to enable pre-release testing and gather early feedback. These efforts improve stability, accelerate feedback loops, and set the stage for reliable production releases.
November 2025
September 2025
2 Commits • 1 Features
Sep 1, 2025September 2025 monthly summary for percy/cli focusing on delivering a more accurate DOM serialization and reinforcing CI reliability, with release readiness for the next cycle. Highlights include a feature enhancement to shadow DOM serialization and a robustness fix to the CI workflow, contributing to higher test fidelity and faster, more reliable ship cycles.
September 2025
2 Commits • 1 Features
Sep 1, 2025September 2025 monthly summary for percy/cli focusing on delivering a more accurate DOM serialization and reinforcing CI reliability, with release readiness for the next cycle. Highlights include a feature enhancement to shadow DOM serialization and a robustness fix to the CI workflow, contributing to higher test fidelity and faster, more reliable ship cycles.
June 2025
1 Commits • 1 Features
Jun 1, 2025June 2025: Focused on release engineering for Percy CLI. Delivered a stable CLI release: v1.31.0, which includes the previous v1.30.11, accompanied by release notes and a version bump. This work reinforces release management discipline, improves downstream upgrade predictability, and provides a solid baseline for upcoming CLI improvements.
1 Commits • 1 Features
Jun 1, 2025June 2025: Focused on release engineering for Percy CLI. Delivered a stable CLI release: v1.31.0, which includes the previous v1.30.11, accompanied by release notes and a version bump. This work reinforces release management discipline, improves downstream upgrade predictability, and provides a solid baseline for upcoming CLI improvements.
June 2025
April 2025
2 Commits • 1 Features
Apr 1, 2025April 2025: Focused on stability of Percy CLI and enabling beta release for 1.30.11-beta.1. Delivered a robustness fix for DOM serialization on pages without a body and packaging/configuration updates for the beta release. The work improves reliability on diverse page structures and accelerates beta distribution.
April 2025
2 Commits • 1 Features
Apr 1, 2025April 2025: Focused on stability of Percy CLI and enabling beta release for 1.30.11-beta.1. Delivered a robustness fix for DOM serialization on pages without a body and packaging/configuration updates for the beta release. The work improves reliability on diverse page structures and accelerates beta distribution.
March 2025
2 Commits • 1 Features
Mar 1, 2025March 2025 - percy/cli Key deliverables: - Shadow DOM Stylesheet Ordering Fix: Correctly appends new stylesheets after the last existing one in Shadow DOM and document fragments; tests updated to assert the correct count and order of serialized stylesheets. - CLI Tool Beta Release v1.30.9-beta.1: Release tagging completed (PR #1883) to enable testing and early access (no code changes in this cycle). Impact: - Improves rendering reliability and predictability for users; strengthens regression safety with updated tests; accelerates feedback through beta access. Technologies/skills: - Shadow DOM, document fragments, stylesheet serialization, test coverage, release tagging, PR-based workflows.
2 Commits • 1 Features
Mar 1, 2025March 2025 - percy/cli Key deliverables: - Shadow DOM Stylesheet Ordering Fix: Correctly appends new stylesheets after the last existing one in Shadow DOM and document fragments; tests updated to assert the correct count and order of serialized stylesheets. - CLI Tool Beta Release v1.30.9-beta.1: Release tagging completed (PR #1883) to enable testing and early access (no code changes in this cycle). Impact: - Improves rendering reliability and predictability for users; strengthens regression safety with updated tests; accelerates feedback through beta access. Technologies/skills: - Shadow DOM, document fragments, stylesheet serialization, test coverage, release tagging, PR-based workflows.
March 2025
February 2025
6 Commits • 3 Features
Feb 1, 2025February 2025 (2025-02) focused on strengthening reliability, security, and release hygiene in percy/cli. Delivered payload guardrails to skip large resources during discovery and added tests for handling files up to and beyond 25MB/100MB, reducing risk of resource overconsumption in CI runs. Introduced sanitizeObject utility to prevent prototype pollution during object merging, with safeguards against unsafe keys and tests validating correct behavior. Improved release processes by updating versioning and tagging for the 1.30.x series, including v1.30.8 and v1.30.8-beta.2, plus prep for v1.30.9. Fixed content-length handling to be robust against NaN values, missing headers, and case-insensitive names, with tests to ensure stability across environments. These changes collectively improve stability, security, and velocity in downstream usage and releases, delivering tangible business value and stronger platform guarantees.
February 2025
6 Commits • 3 Features
Feb 1, 2025February 2025 (2025-02) focused on strengthening reliability, security, and release hygiene in percy/cli. Delivered payload guardrails to skip large resources during discovery and added tests for handling files up to and beyond 25MB/100MB, reducing risk of resource overconsumption in CI runs. Introduced sanitizeObject utility to prevent prototype pollution during object merging, with safeguards against unsafe keys and tests validating correct behavior. Improved release processes by updating versioning and tagging for the 1.30.x series, including v1.30.8 and v1.30.8-beta.2, plus prep for v1.30.9. Fixed content-length handling to be robust against NaN values, missing headers, and case-insensitive names, with tests to ensure stability across environments. These changes collectively improve stability, security, and velocity in downstream usage and releases, delivering tangible business value and stronger platform guarantees.
Activity
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Quality Metrics
Correctness90.6%
Maintainability84.8%
Architecture82.4%
Performance83.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
GoJSONJavaScriptShellYAML
Technical Skills
Backend DevelopmentCI/CDCLI DevelopmentConfiguration ManagementDOM ManipulationDebuggingFront End DevelopmentFront-end DevelopmentGitHub ActionsGoJavaScriptNode.jsRelease ManagementSecurityTesting
Repositories Contributed To
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