canonical/snapd
Nov 2024 – Mar 2026
14 Months active
Languages Used
GoShellCYAMLshyamlTypeScriptplaintext
Technical Skills
Bug FixCI/CDCode MaintenanceError HandlingGoGo Development
Andrew Phelps
PROFILE
Andrew Phelps
Over 14 months, contributed to canonical/snapd by building and refining backend systems for secure device management, cluster orchestration, and automated installation workflows. Leveraged Go and C to implement features such as OPTEE-based full disk encryption, robust dependency management, and distributed cluster assembly with authenticated transport and assertion handling. Enhanced reliability through test infrastructure improvements, CI/CD automation, and code modernization, while introducing graph-based task visualization and per-user update tracking. Focused on maintainability by refactoring installation flows, optimizing memory usage, and enforcing repository hygiene. The work enabled scalable deployments, improved update robustness, and streamlined system programming across diverse Linux environments.
Overall Statistics
Feature vs Bugs
72%Features
Repository Contributions
96Total
Bugs
14
Commits
96
Features
36
Lines of code
52,362
Activity Months14
Your Network
461 peopleSame Organization
@canonical.com376
Work History
March 2026
15 Commits • 4 Features
Mar 1, 2026March 2026 performance for canonical/snapd: Delivered a series of reliability and efficiency improvements across the update lifecycle, including a significantly enhanced installation/update workflow, robust seed refresh/state management, per-user refresh tracking, and graph-based task visualization. Strengthened automation with targeted bug fixes that improve upgrade reliability and CI stability. These changes reduce upgrade friction, shorten installation times, improve recoverability, and increase observability for developers and operators.
15 Commits • 4 Features
Mar 1, 2026March 2026 performance for canonical/snapd: Delivered a series of reliability and efficiency improvements across the update lifecycle, including a significantly enhanced installation/update workflow, robust seed refresh/state management, per-user refresh tracking, and graph-based task visualization. Strengthened automation with targeted bug fixes that improve upgrade reliability and CI stability. These changes reduce upgrade friction, shorten installation times, improve recoverability, and increase observability for developers and operators.
March 2026
February 2026
15 Commits • 7 Features
Feb 1, 2026February 2026 (Month: 2026-02) - Key business and technical outcomes across canonical/snapd: - Kernel UC26 Testing Framework Enhancements and Bug Fixes: Enhanced the kernel component testing framework for UC26 with nested tests, proper kernel declarations, and systemd drop-ins handling; added a new driver library JSON config; workaround for a pc-kernel bug on 26/edge; ensured accurate test coverage. - Reboot, Task Management, and Test Framework Improvements: Refactored and strengthened task management and reboot-related test framework; improved taskChainSpan boundaries, pre/post-reboot task placement, and reboot edge handling; cleaned reboot unit tests. - Ubuntu Pro Control Interface and Access Policies: Introduced ubuntu-pro-control interface for Ubuntu Advantage D-Bus API access with AppArmor policies; updated tests and enabled read access to /etc/ubuntu-advantage/uaclient.conf. - Snap Installation and Refresh Process Improvements: Refactored to typed task sets; parallel downloads of essential snaps during refresh; added dependencies to enforce correct refresh sequencing; improved handling of throttling responses from store. - Offline Validation Set Enforcement: Enabled offline validation sets by resolving prerequisites locally and improving error handling for validation set assertions. - Graphviz Visualization for Change Graphs: Added Graphviz dot representations for change graphs with improved labeling and input/output handling; included unit tests. - SeedRefresh Feature Flag: Introduced experimental seed-refresh flag to enable seed creation during model snap refresh.
February 2026
15 Commits • 7 Features
Feb 1, 2026February 2026 (Month: 2026-02) - Key business and technical outcomes across canonical/snapd: - Kernel UC26 Testing Framework Enhancements and Bug Fixes: Enhanced the kernel component testing framework for UC26 with nested tests, proper kernel declarations, and systemd drop-ins handling; added a new driver library JSON config; workaround for a pc-kernel bug on 26/edge; ensured accurate test coverage. - Reboot, Task Management, and Test Framework Improvements: Refactored and strengthened task management and reboot-related test framework; improved taskChainSpan boundaries, pre/post-reboot task placement, and reboot edge handling; cleaned reboot unit tests. - Ubuntu Pro Control Interface and Access Policies: Introduced ubuntu-pro-control interface for Ubuntu Advantage D-Bus API access with AppArmor policies; updated tests and enabled read access to /etc/ubuntu-advantage/uaclient.conf. - Snap Installation and Refresh Process Improvements: Refactored to typed task sets; parallel downloads of essential snaps during refresh; added dependencies to enforce correct refresh sequencing; improved handling of throttling responses from store. - Offline Validation Set Enforcement: Enabled offline validation sets by resolving prerequisites locally and improving error handling for validation set assertions. - Graphviz Visualization for Change Graphs: Added Graphviz dot representations for change graphs with improved labeling and input/output handling; included unit tests. - SeedRefresh Feature Flag: Introduced experimental seed-refresh flag to enable seed creation during model snap refresh.
January 2026
6 Commits • 3 Features
Jan 1, 2026January 2026 monthly review for canonical/snapd focusing on automation, reliability, and maintainability. Delivered feature work to automate hybrid installations, enhance time synchronization control, and streamline installation orchestration. Expanded test coverage to validate new preseeding flows. Demonstrated strong collaboration and code quality improvements through refactoring and task chain redesign.
6 Commits • 3 Features
Jan 1, 2026January 2026 monthly review for canonical/snapd focusing on automation, reliability, and maintainability. Delivered feature work to automate hybrid installations, enhance time synchronization control, and streamline installation orchestration. Expanded test coverage to validate new preseeding flows. Demonstrated strong collaboration and code quality improvements through refactoring and task chain redesign.
January 2026
November 2025
3 Commits • 2 Features
Nov 1, 2025November 2025 focused on improving repository hygiene, memory efficiency, and session reliability for canonical/snapd. The work delivers tangible business value by reducing maintenance overhead, lowering operational risk, and improving end-user stability through cleaner code paths and more robust authentication handling.
November 2025
3 Commits • 2 Features
Nov 1, 2025November 2025 focused on improving repository hygiene, memory efficiency, and session reliability for canonical/snapd. The work delivers tangible business value by reducing maintenance overhead, lowering operational risk, and improving end-user stability through cleaner code paths and more robust authentication handling.
October 2025
13 Commits • 3 Features
Oct 1, 2025October 2025: Delivered security-focused device identity and cluster state application for canonical/snapd, strengthened cluster configuration validation, and improved maintenance/testing workflows. Implemented cryptographic device identity verification, serial assertions, and automated application of cluster state to devices; exposed serial assertion data in devicestate and added a function to apply cluster assertion state. Enhanced config safety with unique subcluster names and device ID bounds. Maintenance and testing improvements include in-flight validation sets for snapctl install, Go-version commentary updates, and targeted cleanup. These changes improve deployment reliability, enforce verified device-state, and reduce configuration risk across clusters.
13 Commits • 3 Features
Oct 1, 2025October 2025: Delivered security-focused device identity and cluster state application for canonical/snapd, strengthened cluster configuration validation, and improved maintenance/testing workflows. Implemented cryptographic device identity verification, serial assertions, and automated application of cluster state to devices; exposed serial assertion data in devicestate and added a function to apply cluster assertion state. Enhanced config safety with unique subcluster names and device ID bounds. Maintenance and testing improvements include in-flight validation sets for snapctl install, Go-version commentary updates, and targeted cleanup. These changes improve deployment reliability, enforce verified device-state, and reduce configuration risk across clusters.
October 2025
September 2025
7 Commits • 3 Features
Sep 1, 2025September 2025 (canonical/snapd): Delivered a more secure, testable cluster assembly workflow with a transport abstraction and HTTPS integration, expanded cryptographic capabilities with direct signing/verification interfaces, and automated lifecycle features that enable automatic completion when a target device count is reached. Key back-end improvements to data management include exposing advanced backstore handling (RODatabase WithStackedBackstore) and an explicit expected-size concept to prevent stalls. These changes improved security, testability, deployment reliability, and operator feedback for large-scale device assemblies.
September 2025
7 Commits • 3 Features
Sep 1, 2025September 2025 (canonical/snapd): Delivered a more secure, testable cluster assembly workflow with a transport abstraction and HTTPS integration, expanded cryptographic capabilities with direct signing/verification interfaces, and automated lifecycle features that enable automatic completion when a target device count is reached. Key back-end improvements to data management include exposing advanced backstore handling (RODatabase WithStackedBackstore) and an explicit expected-size concept to prevent stalls. These changes improved security, testability, deployment reliability, and operator feedback for large-scale device assemblies.
August 2025
5 Commits • 2 Features
Aug 1, 2025Monthly summary for 2025-08: Delivered security enhancements and foundation for scalable cluster management in canonical/snapd, while stabilizing the test environment. Key outcomes include OPTEE-based Full Disk Encryption (FDE) support, a new AssembleState-based framework for distributed cluster assembly with discovery and device tracking, and a test environment reliability fix that removes reliance on sudo -E.
5 Commits • 2 Features
Aug 1, 2025Monthly summary for 2025-08: Delivered security enhancements and foundation for scalable cluster management in canonical/snapd, while stabilizing the test environment. Key outcomes include OPTEE-based Full Disk Encryption (FDE) support, a new AssembleState-based framework for distributed cluster assembly with discovery and device tracking, and a test environment reliability fix that removes reliance on sudo -E.
August 2025
July 2025
9 Commits • 4 Features
Jul 1, 2025Concise monthly summary for 2025-07 focusing on reliability, CI stability, and scalable architecture for canonical/snapd. Delivered targeted bug fix for device remodeling UC18, expanded test infrastructure to bypass AppArmor constraints, and strengthened seeding and initialization flows. Introduced API safety guards for Full Disk Encryption and a KeyProtectorFactory abstraction to prepare for OPTEE changes. Implemented RouteSelector for publication routing to optimize cluster assembly. These efforts reduced upgrade risk, improved testing fidelity, and laid groundwork for secure, scalable deployments.
July 2025
9 Commits • 4 Features
Jul 1, 2025Concise monthly summary for 2025-07 focusing on reliability, CI stability, and scalable architecture for canonical/snapd. Delivered targeted bug fix for device remodeling UC18, expanded test infrastructure to bypass AppArmor constraints, and strengthened seeding and initialization flows. Introduced API safety guards for Full Disk Encryption and a KeyProtectorFactory abstraction to prepare for OPTEE changes. Implemented RouteSelector for publication routing to optimize cluster assembly. These efforts reduced upgrade risk, improved testing fidelity, and laid groundwork for secure, scalable deployments.
June 2025
6 Commits • 2 Features
Jun 1, 2025June 2025 monthly summary for canonical/snapd: Focused on delivering business-value features, tightening reliability, and improving development/testing efficiency. Highlights include enhanced CLI usability for multi-component operations, accurate install feedback, offline prereq tracking for channel switches, build stability under nooptee, and streamlined tests/CI for ARM64 and network-independent verification.
6 Commits • 2 Features
Jun 1, 2025June 2025 monthly summary for canonical/snapd: Focused on delivering business-value features, tightening reliability, and improving development/testing efficiency. Highlights include enhanced CLI usability for multi-component operations, accurate install feedback, offline prereq tracking for channel switches, build stability under nooptee, and streamlined tests/CI for ARM64 and network-independent verification.
June 2025
May 2025
5 Commits • 1 Features
May 1, 2025May 2025 monthly summary for canonical/snapd focusing on delivering stability improvements, cross-arch security features, and build-time reliability. The work during the month enhanced test reliability, expanded hardware security capabilities, and hardened prerequisites workflows, aligning with business goals of reducing time-to-ship, lowering flaky test rates, and broadening platform support.
May 2025
5 Commits • 1 Features
May 1, 2025May 2025 monthly summary for canonical/snapd focusing on delivering stability improvements, cross-arch security features, and build-time reliability. The work during the month enhanced test reliability, expanded hardware security capabilities, and hardened prerequisites workflows, aligning with business goals of reducing time-to-ship, lowering flaky test rates, and broadening platform support.
April 2025
4 Commits • 2 Features
Apr 1, 2025April 2025 for canonical/snapd focused on modernizing Go codebase practices and strengthening dependency resolution to reduce maintenance overhead and improve reliability of snap updates. Delivered two primary features with measurable impact: Go code modernization aligned with modernize tooling, and robust dependency resolution that prevents update deadlocks by detecting circular dependencies and enforcing prerequisite updates. Also fixed a validation-wait bug to ensure updates proceed in the correct order, reducing system stalls in production workflows.
4 Commits • 2 Features
Apr 1, 2025April 2025 for canonical/snapd focused on modernizing Go codebase practices and strengthening dependency resolution to reduce maintenance overhead and improve reliability of snap updates. Delivered two primary features with measurable impact: Go code modernization aligned with modernize tooling, and robust dependency resolution that prevents update deadlocks by detecting circular dependencies and enforcing prerequisite updates. Also fixed a validation-wait bug to ensure updates proceed in the correct order, reducing system stalls in production workflows.
April 2025
January 2025
2 Commits • 1 Features
Jan 1, 2025January 2025: Delivered reliability improvements and edge-tracking features for canonical/snapd, focused on sequencing and reboot-aware task wiring, plus test updates to solidify relationships between downloads and edge states. Key changes include: 1) Snap Task Lifecycle Reliability During Remodel - ensure snap link tasks are not marked complete until reboot finishes; synchronize MaybeRebootEdge with AddLinkNewBaseOrKernel and LinkNewBaseOrKernel to align with system reboots during remodel. 2) Snap Download Task Edge Tracking (SnapSetupEdge) - propagate SnapSetupEdge to snap setup task creation in Download and DownloadComponents; updated tests to verify edge association with the download snap task.
January 2025
2 Commits • 1 Features
Jan 1, 2025January 2025: Delivered reliability improvements and edge-tracking features for canonical/snapd, focused on sequencing and reboot-aware task wiring, plus test updates to solidify relationships between downloads and edge states. Key changes include: 1) Snap Task Lifecycle Reliability During Remodel - ensure snap link tasks are not marked complete until reboot finishes; synchronize MaybeRebootEdge with AddLinkNewBaseOrKernel and LinkNewBaseOrKernel to align with system reboots during remodel. 2) Snap Download Task Edge Tracking (SnapSetupEdge) - propagate SnapSetupEdge to snap setup task creation in Download and DownloadComponents; updated tests to verify edge association with the download snap task.
December 2024
2 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for canonical/snapd: Focused on enhancing snap management reliability during remodels and multi-revision scenarios. Delivered revision-aware fake store support and component remodel handling, with improved error handling and testability. These changes reduce risk in store operations, enable safer upgrade/downgrade cycles, and lay groundwork for more robust component lifecycle management in real-store flows.
2 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for canonical/snapd: Focused on enhancing snap management reliability during remodels and multi-revision scenarios. Delivered revision-aware fake store support and component remodel handling, with improved error handling and testability. These changes reduce risk in store operations, enable safer upgrade/downgrade cycles, and lay groundwork for more robust component lifecycle management in real-store flows.
December 2024
November 2024
4 Commits • 1 Features
Nov 1, 2024November 2024 monthly summary for canonical/snapd. Focused on stabilizing the test suite around reboot-related kernel changes and tightening code quality in the asserts packages. These efforts reduce test flakiness, accelerate iteration on reboot-related updates, and improve the clarity of constraint-related error messages, contributing to more reliable releases and easier maintenance.
November 2024
4 Commits • 1 Features
Nov 1, 2024November 2024 monthly summary for canonical/snapd. Focused on stabilizing the test suite around reboot-related kernel changes and tightening code quality in the asserts packages. These efforts reduce test flakiness, accelerate iteration on reboot-related updates, and improve the clarity of constraint-related error messages, contributing to more reliable releases and easier maintenance.
Activity
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Quality Metrics
Correctness90.0%
Maintainability86.2%
Architecture86.4%
Performance82.0%
AI Usage22.8%
Skills & Technologies
Programming Languages
CGoJSONShellTypeScriptYAMLbashplaintextshyaml
Technical Skills
API DesignAPI DevelopmentAPI developmentAbstractionAppArmorAssertion HandlingAssertion ManagementBackend DevelopmentBug FixBuild SystemsC ProgrammingCI/CDChannel ProgrammingCode DocumentationCode Maintenance
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline