chore(deps): update anthropics/claude-code-action action to v1.0.90

[renovate]

This PR contains the following updates:

Package	Type	Update	Change	Pending
anthropics/claude-code-action	action	patch	v1.0.89 → v1.0.90	v1.0.93 (+2)

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Release Notes

anthropics/claude-code-action (anthropics/claude-code-action)

v1.0.90

Compare Source

What's Changed

• fix: forward MCP_TIMEOUT, MCP_TOOL_TIMEOUT, MAX_MCP_OUTPUT_TOKENS to action step by @​qozle in #​1162
• security: reject PATH_TO_CLAUDE_CODE_EXECUTABLE with control characters by @​qozle in #​1185

Full Changelog: anthropics/claude-code-action@v1...v1.0.90

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Configuration

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[github-actions]

Renovate PR Review Results

⚖️ Safety Assessment: ✅ Safe

🔍 Release Content Analysis

This update from v1.0.89 to v1.0.90 contains two changes:

1. Bug Fix: MCP Environment Variable Forwarding (#1162)

• Adds passthrough for three MCP-related environment variables to the Claude CLI subprocess:
  • MCP_TIMEOUT - Controls timeout for MCP server operations
  • MCP_TOOL_TIMEOUT - Controls timeout for individual MCP tool calls
  • MAX_MCP_OUTPUT_TOKENS - Limits maximum token output from MCP servers
• Impact: Fixes issue where these variables weren't reaching the subprocess, causing timeouts
• Breaking Change: None - purely additive functionality
• Backward Compatibility: Fully maintained - if variables aren't set, behavior is identical to previous version

2. Security Fix: PATH_TO_CLAUDE_CODE_EXECUTABLE Validation (#1185)

• Adds input validation to reject PATH_TO_CLAUDE_CODE_EXECUTABLE if it contains control characters (ASCII 0x00-0x1f and 0x7f)
• Security Impact: Prevents newline injection attacks into GITHUB_PATH
• Attack Vector: Malicious input like /usr/bin/claude\n/attacker/path could inject attacker-controlled directories into PATH for all subsequent workflow steps
• Fix Approach: Fail-closed validation - immediately throw error if control characters detected
• Breaking Change: Only breaks if the environment variable contained control characters (which would be misconfigured or malicious)

🎯 Impact Scope Investigation

Usage Locations Identified:

• .github/workflows/ci.yml - 2 instances:
  • Line 253: content-review job
  • Line 342: code-review job
• .github/workflows/claude.yml - 1 instance:
  • Line 35: claude job

Configuration Analysis:

• No MCP-related environment variables (MCP_TIMEOUT, MCP_TOOL_TIMEOUT, MAX_MCP_OUTPUT_TOKENS) are currently set in this repository
• No PATH_TO_CLAUDE_CODE_EXECUTABLE is set in this repository
• All usages rely on standard inputs: claude_code_oauth_token, allowed_bots, prompt, claude_args

Dependency Impact:

• No other dependencies are affected by this update
• The action is consumed as a pre-built composite action via commit hash
• Version bump from 6e2bd52 (v1.0.89) to 26ddc35 (v1.0.90)

Behavioral Impact:

• Bug fix is a no-op for this repository (MCP variables not used)
• Security fix is a no-op for this repository (PATH_TO_CLAUDE_CODE_EXECUTABLE not used)
• All existing workflows will continue functioning identically

💡 Recommended Actions

Immediate Actions:

• ✅ Safe to merge - This is a backward-compatible patch update with bug fixes and security hardening
• No code changes required in this repository
• No configuration changes required
• No testing required beyond standard CI validation

Post-Merge:

• No follow-up actions needed
• Consider future use of MCP environment variables if MCP integration is planned (now properly supported)

Why This is Safe:

1. Zero Breaking Changes: Both changes are either additive (MCP forwarding) or defensive (control character validation)
2. No Usage Impact: Neither feature affects current usage patterns in this repository
3. Security Improvement: The PATH validation fix prevents a real injection vulnerability
4. Tested: Release includes full test suite pass (664/664 tests)
5. Standard Pattern: Follows existing patterns in action.yml for environment variable forwarding

🔗 Reference Links

• Release Notes v1.0.90
• PR #1162: MCP Environment Variable Forwarding
• PR #1185: Security Fix for PATH_TO_CLAUDE_CODE_EXECUTABLE
• Full Changelog

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