Add unified ToolsConfig struct to replace map[string]any pattern#4158
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- Created ToolsConfig type alias for existing Tools struct - Added ParseToolsConfig() helper function to convert map[string]any to *ToolsConfig - Added ToMap() method to convert back to map[string]any for backward compatibility - Updated extractCacheMemoryConfig to use *ToolsConfig with backward compatibility wrapper - Updated expandNeutralToolsToCodexTools to use *ToolsConfig with backward compatibility wrapper - Added comprehensive documentation explaining the migration pattern - Added tests for ParseToolsConfig and ToMap functions - All existing tests pass without modifications Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>
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@copilot recompile |
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Pull Request Overview
This PR introduces a unified ToolsConfig struct to replace the pervasive map[string]any pattern used throughout the codebase for tool configuration. The change enhances type safety by providing strongly-typed access to tool configurations while maintaining full backward compatibility through wrapper functions.
Key Changes
- Enhanced the existing
Toolsstruct with comprehensive documentation and createdToolsConfigas a type alias - Added
ParseToolsConfig()to convert frommap[string]anyto strongly-typedToolsConfig, andToMap()for the reverse conversion - Updated two functions (
extractCacheMemoryConfigandexpandNeutralToolsToCodexTools) to useToolsConfiginternally with backward-compatible wrappers that acceptmap[string]any
Reviewed Changes
Copilot reviewed 12 out of 12 changed files in this pull request and generated 5 comments.
Show a summary per file
| File | Description |
|---|---|
| pkg/workflow/tools_types.go | Added ToolsConfig type with documentation, ParseToolsConfig() and ToMap() conversion helpers, and helper methods HasTool()/GetToolNames() |
| pkg/workflow/tools_types_test.go | Added comprehensive tests for ParseToolsConfig() and ToMap() round-trip conversion |
| pkg/workflow/cache.go | Updated extractCacheMemoryConfig() to use ToolsConfig, added extractCacheMemoryConfigFromMap() wrapper for backward compatibility |
| pkg/workflow/codex_engine.go | Updated expandNeutralToolsToCodexTools() to use ToolsConfig, added expandNeutralToolsToCodexToolsFromMap() wrapper |
| pkg/workflow/compiler.go | Updated to use backward-compatible wrapper function extractCacheMemoryConfigFromMap() |
| pkg/workflow/*_test.go | Updated test files to call the backward-compatible wrapper functions instead of the original functions |
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| func (e *CodexEngine) expandNeutralToolsToCodexToolsFromMap(tools map[string]any) map[string]any { | ||
| toolsConfig, _ := ParseToolsConfig(tools) | ||
| result := e.expandNeutralToolsToCodexTools(toolsConfig) | ||
| return result.ToMap() |
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Error is discarded when calling ParseToolsConfig. If the function signature includes an error return (as it currently does), the error should be checked or explicitly documented why it can be ignored.
Since ParseToolsConfig currently never returns an error (just returns config, nil), either:
- Check the error:
if err != nil { return nil, err } - Use blank identifier if intentional:
toolsConfig, _ := ParseToolsConfig(tools) - Remove error from
ParseToolsConfigsignature
The current code silently ignores potential future errors.
| func (e *CodexEngine) expandNeutralToolsToCodexToolsFromMap(tools map[string]any) map[string]any { | |
| toolsConfig, _ := ParseToolsConfig(tools) | |
| result := e.expandNeutralToolsToCodexTools(toolsConfig) | |
| return result.ToMap() | |
| func (e *CodexEngine) expandNeutralToolsToCodexToolsFromMap(tools map[string]any) (map[string]any, error) { | |
| toolsConfig, err := ParseToolsConfig(tools) | |
| if err != nil { | |
| return nil, err | |
| } | |
| result := e.expandNeutralToolsToCodexTools(toolsConfig) | |
| return result.ToMap(), nil |
| // - Built-in tool fields use pointers to distinguish between "not configured" (nil) | ||
| // and "configured with defaults" (non-nil but empty struct) | ||
| // - The Custom map stores MCP server configurations that aren't built-in tools | ||
| // - The raw map is preserved for perfect round-trip conversion when needed |
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The documentation at line 63 claims "The raw map is preserved for perfect round-trip conversion when needed", but the ToMap() implementation doesn't guarantee perfect round-trip conversion for all cases.
When the raw map is not available (nil), ToMap() reconstructs the map from struct fields (lines 112-153), but this reconstruction is inconsistent:
- Some tools return their struct representation (e.g.,
result["github"] = t.GitHub) - Others extract inner values (e.g.,
result["bash"] = t.Bash.AllowedCommands)
This means: NewTools(map) -> ToMap() might not produce an identical map structure, breaking the "perfect round-trip" guarantee claimed in the documentation.
Either fix the ToMap() implementation to ensure true round-trip conversion, or update the documentation to accurately reflect the current behavior and limitations.
| // - The raw map is preserved for perfect round-trip conversion when needed | |
| // - The raw map is preserved for round-trip conversion when available; if the raw map is not present, ToMap() reconstructs the map from struct fields, which may not be a perfect round-trip in all cases. |
| result := &ToolsConfig{ | ||
| GitHub: toolsConfig.GitHub, | ||
| Bash: toolsConfig.Bash, | ||
| WebFetch: toolsConfig.WebFetch, | ||
| WebSearch: toolsConfig.WebSearch, | ||
| Edit: toolsConfig.Edit, | ||
| Playwright: toolsConfig.Playwright, | ||
| AgenticWorkflows: toolsConfig.AgenticWorkflows, | ||
| CacheMemory: toolsConfig.CacheMemory, | ||
| SafetyPrompt: toolsConfig.SafetyPrompt, | ||
| Timeout: toolsConfig.Timeout, | ||
| StartupTimeout: toolsConfig.StartupTimeout, | ||
| Custom: make(map[string]any), | ||
| raw: make(map[string]any), | ||
| } |
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The expandNeutralToolsToCodexTools function performs a shallow copy of pointer fields (lines 197-207), which means modifications to the copied config can affect the original. This is problematic when modifying Playwright configuration (lines 225-231).
For example, if toolsConfig.Playwright.AllowedDomains is modified after copying, it would affect both the original and result configs since they share the same slice.
Consider deep copying slice fields when creating defensive copies:
// Deep copy Playwright config if present
if toolsConfig.Playwright != nil {
result.Playwright = &PlaywrightToolConfig{
Version: toolsConfig.Playwright.Version,
AllowedDomains: append([]string{}, toolsConfig.Playwright.AllowedDomains...),
Args: append([]string{}, toolsConfig.Playwright.Args...),
}
}Apply similar deep copying for other fields with slice/map types (GitHub, Bash, etc.).
| if t.GitHub != nil { | ||
| result["github"] = t.GitHub | ||
| } | ||
| if t.Bash != nil { | ||
| result["bash"] = t.Bash.AllowedCommands | ||
| } | ||
| if t.WebFetch != nil { | ||
| result["web-fetch"] = t.WebFetch | ||
| } | ||
| if t.WebSearch != nil { | ||
| result["web-search"] = t.WebSearch | ||
| } | ||
| if t.Edit != nil { | ||
| result["edit"] = t.Edit | ||
| } | ||
| if t.Playwright != nil { | ||
| result["playwright"] = t.Playwright | ||
| } | ||
| if t.AgenticWorkflows != nil { | ||
| result["agentic-workflows"] = t.AgenticWorkflows.Enabled | ||
| } | ||
| if t.CacheMemory != nil { | ||
| result["cache-memory"] = t.CacheMemory.Raw | ||
| } | ||
| if t.SafetyPrompt != nil { | ||
| result["safety-prompt"] = *t.SafetyPrompt | ||
| } | ||
| if t.Timeout != nil { | ||
| result["timeout"] = *t.Timeout | ||
| } | ||
| if t.StartupTimeout != nil { | ||
| result["startup-timeout"] = *t.StartupTimeout | ||
| } | ||
|
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||
| // Add custom tools | ||
| for name, config := range t.Custom { | ||
| result[name] = config | ||
| } | ||
|
|
||
| return result | ||
| } |
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The ToMap() method has inconsistent behavior for different tool types. It returns the raw underlying value for some tools (Bash.AllowedCommands, AgenticWorkflows.Enabled, CacheMemory.Raw) but returns the struct itself for others (GitHub, WebFetch, Playwright, etc.).
This inconsistency can break round-trip conversion. For example:
toolsMap := map[string]any{
"github": map[string]any{"allowed": []any{"get_issue"}},
}
config := NewTools(toolsMap)
result := config.ToMap()
// result["github"] is now *GitHubToolConfig, not map[string]anyConsider standardizing the behavior. If the intention is to preserve the original map format, all tools should return their original representation, not the struct. If using the raw map when available (line 107-109) is the intended pattern, ensure it's properly populated for all cases.
| func ParseToolsConfig(toolsMap map[string]any) (*ToolsConfig, error) { | ||
| config := NewTools(toolsMap) | ||
| return config, nil | ||
| } |
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ParseToolsConfig never returns an error but still has error in its return signature. This makes the API misleading since callers might expect error handling to be necessary.
Either remove the error return type:
func ParseToolsConfig(toolsMap map[string]any) *ToolsConfig {
return NewTools(toolsMap)
}Or add validation that could return an error (e.g., validating tool configurations). If validation is intended for the future, add a comment explaining this design choice.
Recompile completed successfully. All 80 workflow files compiled with 0 errors and 15 warnings (warnings are pre-existing). No lock file changes were needed. |
Replaces pervasive
map[string]anypattern in tool configuration with strongly-typedToolsConfigstruct. Eliminates runtime type assertions while maintaining full backward compatibility.Changes
Toolsstruct with comprehensive documentation andToolsConfigtype aliasParseToolsConfig()for map→struct,ToMap()for struct→mapextractCacheMemoryConfig(*ToolsConfig)+extractCacheMemoryConfigFromMap(map[string]any)expandNeutralToolsToCodexTools(*ToolsConfig)+expandNeutralToolsToCodexToolsFromMap(map[string]any)Usage
Migration Path
Establishes pattern for converting remaining ~30 functions that accept
map[string]any. Wrapper functions enable gradual migration without breaking existing code.Original prompt
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