Enforce strict path validation for precondition operators at execution time

[Copilot]

At plan time, missing Request.Context.* paths in preconditions correctly emit a soft warning. At execution time however, missing paths silently evaluated to false via Test-IdleCondition — swallowing misconfiguration as a valid precondition failure instead of throwing.

Changes

• Assert-IdleConditionPathsResolvable: Adds -ExcludeExistsOperatorPaths switch. When set, Get-IdleConditionPaths skips Exists-operator paths during collection — Exists semantics are intentionally "does this path exist?", so a missing path should return false, not error.

• Invoke-IdlePlanObject: Both the regular-step and OnFailure-step precondition blocks now call Assert-IdleConditionPathsResolvable -ExcludeExistsOperatorPaths before Test-IdleCondition. Any non-Exists path missing from the execution context throws instead of silently evaluating.

• Tests: New fixture (missing-context-at-invoke.psd1) and regression test verifying plan succeeds with a warning while execution throws with *unresolved condition path*.

Behaviour matrix

Phase	Missing path in Precondition
New-IdlePlan	Request.Context.* → soft warning; all others → hard error
Invoke-IdlePlan	Any missing non-Exists path → throws
Exists operator	Returns false at any phase (unchanged)

# At plan time: succeeds with a PreconditionContextPathUnresolvedAtPlan warning
$plan = New-IdlePlan -WorkflowPath $wf -Request $req -Providers $providers

# At invoke time: throws "unresolved condition path(s) in Precondition"
Invoke-IdlePlan -Plan $plan -Providers $providers

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[chatgpt-codex-connector]

You have reached your Codex usage limits for code reviews. You can see your limits in the Codex usage dashboard.

[github-actions]

Code Coverage Report

Overall Project	73.97%	🍏

There is no coverage information present for the Files changed