Coverage reviewed October 25, 2026. Source-event dates below are distinct from this article's publication date. Engineering examples and acceptance checks are proposals, not executed experiments.
What the release actually changes
Claude Code 2.1.310 was published October 23 at 23:39 UTC, or October 24 at 05:09 IST. Its notes fix a Windows condition where PreToolUse or PermissionRequest hooks containing only quoted strings could allow a tool call when Git Bash was missing. They also fix Enter on a VSCode plan-feedback button approving instead, expose symbolic-link destinations in read-permission prompts, and clarify unanswered non-interactive MCP elicitation timeouts. Primary source.
The strongest theme is the difference between a control existing and that control retaining its meaning under failure. A hook configured in a file is not enough if a missing interpreter changes execution behavior. A feedback button is not enough if a keyboard path maps it to approval. A permission prompt is incomplete if it presents a friendly symbolic-link name while hiding the actual destination.
A configured control still needs failure semantics
For teams wrapping coding agents, this suggests testing the approval surface as a product interface and an operating-system integration, not only as a policy function. Build a harmless fixture that attempts to write a marker file behind a blocking hook. Run it with the expected shell installed, with the shell unavailable and with a quoted executable path. The desired assertions concern whether the tool ran and which denial was recorded. This is a proposed test plan, not a reproduction performed here.
Test the operating-system dependency
The plan-review case deserves a separate UI test. Keyboard and pointer interactions should produce the same intended decision. A comment submission should remain a comment submission after long editing sessions, focus changes and repeated activation. Record the service-side decision, not just the visual state of the button. This principle generalizes to any system where a model proposes changes and a human reviews them.
The unanswered-elicitation change illustrates another boundary: silence is not an answer. A timeout should not create a new approval or cause a tool to be retried indefinitely while waiting for authorization. An application harness should classify unresolved elicitation distinctly from transient transport failure and keep the original request identity for investigation.
Check the human decision path
These fixes are reasons to inspect affected installations and rerun local permission tests. They do not establish that an attacker exploited a particular system, nor do they certify the entire sandbox. Avoid converting a release note about a narrow condition into a blanket statement that all Windows agent execution was unsafe or that the new version eliminates every approval bypass.
For an original test design, give each harmless marker-write proposal a unique identifier. Store the proposed operation, policy result and actual execution result independently. A denial followed by a marker appearing is a stronger signal than a UI screenshot alone. A missing marker is also insufficient proof unless the fixture demonstrates that the same operation succeeds under an explicitly allowed control case.
Treat unresolved requests as unresolved
Keep approval tests isolated from real repositories and credentials. A temporary directory with synthetic text is enough to exercise the decision path. Avoid fixtures that run destructive commands merely to demonstrate denial. The objective is to observe a boundary, and a reversible marker provides that evidence with a much smaller cleanup burden.
Define observable acceptance evidence
For accessibility coverage, enumerate the intended actions in plain language: submit feedback, approve, reject and dismiss. Execute each through keyboard and pointer interaction, then compare the resulting decision record. Include focus moved away and back, an empty feedback field and a repeated key press. This proposed matrix checks interaction semantics without claiming that every case was implicated in the reported bug.
An operational dashboard should separate denied actions, policy-evaluation failures and requests awaiting a person. Combining them into one error counter hides whether controls are blocking work correctly or failing to reach a decision. Alert on execution without a corresponding allowed decision in the application's own harness. That invariant is more useful than a rising count of permission prompts. None of these proposed fixtures was executed for this review; installations still need local validation under their actual shell and extension configuration.
Sources and evidence
The release addresses specific Windows hook and plan-feedback behavior; inspect decisions, not merely configured controls.