Disable npm release-age cooldown for Claude, Codex, and Gemini engine installs

[Copilot]

Agentic engine installs were still applying npm’s default release-age cooldown, which can delay installation of required CLI versions. This change removes cooldown behavior for Claude, Codex, and Gemini installation paths while leaving runtime-level cooldown behavior available where still intended.

• Installation behavior

  • Claude install now forces cooldown off in its engine installation steps.
  • Codex and Gemini installs now use a dedicated no-cooldown npm install helper.

• Shared install helper

  • Added BuildStandardNpmEngineInstallStepsNoCooldown(...) in pkg/workflow/nodejs.go.
  • Refactored shared npm install step construction through an internal helper with explicit cooldownEnabled control.

• Coverage updates

  • Extended engine-specific tests to assert NPM_CONFIG_MIN_RELEASE_AGE is absent for Claude, Codex, and Gemini installs.
  • Added helper-level test coverage for the no-cooldown install path.

• Compiled workflow output

  • Recompiled avenger.lock.yml so generated workflow output matches updated Claude install step behavior.

// pkg/workflow/gemini_engine.go
npmSteps := BuildStandardNpmEngineInstallStepsNoCooldown(
    "@google/gemini-cli",
    string(constants.DefaultGeminiVersion),
    "Install Gemini CLI",
    "gemini",
    workflowData,
)

[Copilot]

Pull request overview

Removes npm’s default release-age cooldown behavior (NPM_CONFIG_MIN_RELEASE_AGE) from the Claude, Codex, and Gemini engine installation paths so agentic engine CLIs can be installed immediately when needed, while keeping the runtime-level cooldown mechanism available for other installs.

Changes:

• Added a no-cooldown npm engine install helper and refactored the standard helper to route through a shared internal builder with an explicit cooldownEnabled toggle.
• Updated Claude/Codex/Gemini installation code to ensure NPM_CONFIG_MIN_RELEASE_AGE is not set for those engine installs.
• Expanded tests to assert cooldown env omission; recompiled avenger.lock.yml to reflect the updated Claude install behavior.

Show a summary per file

File	Description
pkg/workflow/nodejs.go	Refactors standard npm engine install-step construction and adds a no-cooldown variant.
pkg/workflow/gemini_engine.go	Switches Gemini engine installs to the no-cooldown helper.
pkg/workflow/gemini_engine_test.go	Asserts Gemini install steps do not include NPM_CONFIG_MIN_RELEASE_AGE.
pkg/workflow/engine_helpers_test.go	Adds coverage for the no-cooldown helper behavior.
pkg/workflow/codex_engine.go	Switches Codex engine installs to the no-cooldown helper.
pkg/workflow/codex_engine_test.go	Asserts Codex install steps do not include NPM_CONFIG_MIN_RELEASE_AGE.
pkg/workflow/claude_engine.go	Forces cooldown off for Claude CLI install steps.
pkg/workflow/claude_engine_test.go	Asserts Claude install steps do not include NPM_CONFIG_MIN_RELEASE_AGE.
.github/workflows/avenger.lock.yml	Recompiled workflow output reflecting the updated Claude installation behavior.

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• Files reviewed: 9/9 changed files
• Comments generated: 2