TEST-INFRA: [ci-pipeline-design] Explore Parallel Execution of Nox Sessions #2245

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opened 2026-04-03 10:55:21 +00:00 by freemo · 1 comment
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Metadata

  • Branch: chore/ci-parallel-nox-sessions
  • Commit Message: chore(ci): explore parallel execution of independent nox sessions
  • Milestone: v3.8.0
  • Parent Epic: #1678

Background and Context

The CI pipeline currently runs nox sessions sequentially. Independent nox sessions (e.g., linting, type checking, security scanning) do not depend on each other and could be executed in parallel. Exploring parallel execution of these independent sessions could further reduce the overall pipeline wall-clock time, improving developer feedback loops and CI throughput.

Current Behavior

All nox sessions in the CI pipeline are executed sequentially, even when sessions are logically independent and have no data dependencies on each other. This means the total pipeline time is the sum of all session durations rather than the maximum of any parallel group.

Expected Behavior

Independent nox sessions (e.g., lint, typecheck, security_scan) should be identified and, where feasible, executed in parallel within the CI pipeline. The investigation should determine which sessions can safely run concurrently and propose a concrete implementation strategy.

Acceptance Criteria

  • All nox sessions are audited and categorized as either dependent or independent.
  • A concrete proposal (e.g., Forgejo Actions matrix or parallel job strategy) is documented for running independent sessions concurrently.
  • Any implementation does not break existing CI behavior or introduce race conditions.
  • Pipeline wall-clock time is measurably reduced (or a clear explanation is provided if no reduction is achievable).

Supporting Information

  • Related: #2231 (Lack of Parallelism in CI Jobs)
  • Related: #2203 (Implement Dependency Caching in Nox Sessions)
  • Related: #2209 (Increase default parallelism for tests)
  • Parent Epic: #1678 (Epic: CI Execution Time Optimization)

Subtasks

  • Audit all nox sessions and classify each as dependent or independent
  • Research Forgejo Actions support for parallel job execution (matrix strategy or needs: graph)
  • Draft a proposal for parallelizing independent nox sessions
  • Prototype the parallel execution strategy in a feature branch
  • Validate that no race conditions or shared-state conflicts exist between parallel sessions
  • Measure pipeline wall-clock time before and after the change
  • Update CI configuration (.forgejo/workflows/) to implement the approved strategy
  • Run nox (all default sessions), fix any errors
  • Verify coverage >=97% via nox -s coverage_report

Definition of Done

This issue is complete when:

  • All subtasks above are completed and checked off.
  • A Git commit is created where the first line of the commit message matches the Commit Message in Metadata exactly (chore(ci): explore parallel execution of independent nox sessions), followed by a blank line, then additional lines providing relevant details about the implementation.
  • The commit is pushed to the remote on the branch matching the Branch in Metadata exactly (chore/ci-parallel-nox-sessions).
  • The commit is submitted as a pull request to master, reviewed, and merged before this issue is marked done.
  • All nox stages pass.
  • Coverage >= 97%

Automated by CleverAgents Bot
Supervisor: Unknown | Agent: ca-new-issue-creator

## Metadata - **Branch**: `chore/ci-parallel-nox-sessions` - **Commit Message**: `chore(ci): explore parallel execution of independent nox sessions` - **Milestone**: v3.8.0 - **Parent Epic**: #1678 ## Background and Context The CI pipeline currently runs nox sessions sequentially. Independent nox sessions (e.g., linting, type checking, security scanning) do not depend on each other and could be executed in parallel. Exploring parallel execution of these independent sessions could further reduce the overall pipeline wall-clock time, improving developer feedback loops and CI throughput. ## Current Behavior All nox sessions in the CI pipeline are executed sequentially, even when sessions are logically independent and have no data dependencies on each other. This means the total pipeline time is the sum of all session durations rather than the maximum of any parallel group. ## Expected Behavior Independent nox sessions (e.g., `lint`, `typecheck`, `security_scan`) should be identified and, where feasible, executed in parallel within the CI pipeline. The investigation should determine which sessions can safely run concurrently and propose a concrete implementation strategy. ## Acceptance Criteria - [ ] All nox sessions are audited and categorized as either dependent or independent. - [ ] A concrete proposal (e.g., Forgejo Actions matrix or parallel job strategy) is documented for running independent sessions concurrently. - [ ] Any implementation does not break existing CI behavior or introduce race conditions. - [ ] Pipeline wall-clock time is measurably reduced (or a clear explanation is provided if no reduction is achievable). ## Supporting Information - Related: #2231 (Lack of Parallelism in CI Jobs) - Related: #2203 (Implement Dependency Caching in Nox Sessions) - Related: #2209 (Increase default parallelism for tests) - Parent Epic: #1678 (Epic: CI Execution Time Optimization) ## Subtasks - [ ] Audit all nox sessions and classify each as dependent or independent - [ ] Research Forgejo Actions support for parallel job execution (matrix strategy or `needs:` graph) - [ ] Draft a proposal for parallelizing independent nox sessions - [ ] Prototype the parallel execution strategy in a feature branch - [ ] Validate that no race conditions or shared-state conflicts exist between parallel sessions - [ ] Measure pipeline wall-clock time before and after the change - [ ] Update CI configuration (`.forgejo/workflows/`) to implement the approved strategy - [ ] Run `nox` (all default sessions), fix any errors - [ ] Verify coverage >=97% via `nox -s coverage_report` ## Definition of Done This issue is complete when: - All subtasks above are completed and checked off. - A Git commit is created where the **first line** of the commit message matches the Commit Message in Metadata exactly (`chore(ci): explore parallel execution of independent nox sessions`), followed by a blank line, then additional lines providing relevant details about the implementation. - The commit is pushed to the remote on the branch matching the **Branch** in Metadata exactly (`chore/ci-parallel-nox-sessions`). - The commit is submitted as a **pull request** to `master`, reviewed, and **merged** before this issue is marked done. - All nox stages pass. - Coverage >= 97% --- **Automated by CleverAgents Bot** Supervisor: Unknown | Agent: ca-new-issue-creator
freemo added this to the v3.8.0 milestone 2026-04-03 11:11:47 +00:00
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⚠️ Potential duplicate: There are many existing issues about parallel nox session execution, including #2231, #1909, #1905, #1888, #1873, #1835, #1834, #1831, #1817, and others. Please check if this issue is a duplicate before proceeding.

Label compliance fix applied:

  • Added: State/Unverified, Priority/Low, Type/Task
  • Removed duplicate: Priority/Medium

Automated by CleverAgents Bot
Supervisor: Backlog Grooming | Agent: ca-backlog-groomer

⚠️ **Potential duplicate**: There are many existing issues about parallel nox session execution, including #2231, #1909, #1905, #1888, #1873, #1835, #1834, #1831, #1817, and others. Please check if this issue is a duplicate before proceeding. Label compliance fix applied: - Added: `State/Unverified`, `Priority/Low`, `Type/Task` - Removed duplicate: `Priority/Medium` --- **Automated by CleverAgents Bot** Supervisor: Backlog Grooming | Agent: ca-backlog-groomer
freemo removed this from the v3.8.0 milestone 2026-04-07 01:13:18 +00:00
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Reference
cleveragents/cleveragents-core#2245
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