Solidity — 139 Operations for AI Agents

This page is the canonical reference an AI coding agent uses to refactor, query, and analyze Solidity code through the act MCP server. 139 operations available: 65 refactor, 18 query, 42 analysis, 14 verification. Each operation is callable from Claude Code, Cursor, Codex, OpenCode, or any MCP-compatible agent host. Click any operation for a stable anchor link suitable for citation.

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18Query

65Refactor

42Analysis

14Verify

Query

18 query tools, the same on every supported language. Descriptions live in the shared reference: /docs/query-tools.

callers control_flow data_flow definition diagnostics effect_closure effect_summary fix_auto get_type graph import_organize interface mutations references repo_outline skeleton symbols symbols_batch

Refactor

Operation	Description
`add-bounds-check`	Insert require(index < array.length) bounds check at function start
`add-constant-modifier`	Add constant attribute to storage variables
`add-custom-error`	Insert a custom error declaration at the contract level
`add-event-emission`	Add an emit statement to a function
`add-immutable-modifier`	Mark single-assignment state variables as immutable
`add-null-address-check`	Insert require(addr != address(0)) for address parameters
`add-payable-modifier`	Add payable state mutability modifier to a function
`add-pure-modifier`	Add pure state mutability modifier to a function
`add-reentrancy-guard`	Add nonReentrant modifier and guard pattern to protect against reentrancy
`add-require-check`	Insert require(condition, message) as first statement in a function
`add-require-length-check`	Insert require(array.length > 0) empty-array guard at function start
`add-security-comment`	Insert a NatSpec /// @dev Security: comment above a function
`add-view-modifier`	Add view state mutability modifier to a function
`add-visibility-modifier`	Add explicit visibility modifier (public/private/internal/external)
`change-signature`	Modify function parameters, return, generics
`convert-external-to-public`	Convert external function to public
`convert-if-to-ternary`	Convert simple if/else assignment to ternary operator
`convert-loop-to-mapping-iteration`	Convert for-loop array iteration to mapping when applicable
`convert-memory-to-calldata`	Convert a parameter data location from memory to calldata (external functions only)
`convert-public-to-external`	Convert public function to external when never called internally
`convert-require-to-revert`	Convert require(cond, msg) to if (!cond) revert() pattern
`convert-state-var-to-constant`	Mark immutable state variable as constant if possible
`convert-state-var-to-immutable`	Mark state variable initialized once in constructor as immutable
`convert-ternary-to-if`	Convert ternary operator to if/else statement
`convert-to-checks-effects-interactions`	Reorganize function body into checks-effects-interactions pattern
`extract-constructor-logic`	Extract complex constructor logic to internal function
`extract-function`	Extract code block into a new internal/private function
`extract-interface`	Extract contract interface into separate interface declaration
`extract-library`	Extract utility functions into a library contract
`extract-variable`	Extract expression into a named local variable with inferred type
`extract_function`	Extract a code selection into a new function — automatically infers parameters, return types, and inserts the call site. Use instead of manually cutting/pasting code. Works without LSP; LSP improves type inference. Params: file (string), new_name (string), start_line (u32), start_column (u32), end_line (u32), end_column (u32) [, preview (bool), receipt (bool)]
`extract_variable`	Extract an expression into a named variable — inserts the declaration and replaces the expression with the variable name. Works without LSP. Params: file (string), new_name (string), start_line (u32), start_column (u32), end_line (u32), end_column (u32) [, preview (bool)]
`generate-amount-validation`	Generate require(param > 0, "Invalid amount") check at the top of a function body
`generate-authorization-check`	Insert onlyOwner require check and generate owner state variable + modifier if missing
`generate-balance-check`	Insert require(address(this).balance >= amountParam) at the start of a function
`generate-constructor`	Generate constructor with parameter initialization
`generate-custom-error`	Generate a custom error type from function parameters and replace the first require with revert
`generate-event`	Generate an event declaration from a function's parameters
`generate-event-emitter`	Generate both an event declaration and emit statement for a function
`generate-getter-function`	Generate public getter for private state variable
`generate-interface-from-contract`	Generate interface from contract public/external functions
`generate-mock-implementation`	Generate stub implementation for interface
`generate-ownership-transfer`	Generate transferOwnership function with owner guard in a contract
`generate-reentrancy-guard`	Generate full ReentrancyGuard pattern (_locked var + nonReentrant modifier) in a contract
`generate-setter-function`	Generate a public setter function for a named state variable
`generate-test-helper`	Generate internal function supporting test patterns
`generate-zero-address-check`	Generate require(param != address(0)) check at the top of a function body
`inline`	Inline a variable, function, or method — replace every usage with its definition body, then remove the original. The inverse of extract. Works without LSP (single-file); LSP enables cross-file inlining. Params: file (string), symbol (string) [, line (u32), preview (bool), receipt (bool)]
`inline-function-call`	Replace function call with function body at call site
`inline-variable`	Inline variable reference at all use sites; eliminate declaration
`insert_body`	Replace a function's implementation body with new code. AST-validated — rejects if the result has parse errors, so you can't accidentally break syntax. Use instead of manual text editing for function rewrites. Params: file (string), symbol (string), code (string) [, commit (bool)]
`introduce-variable`	Introduce a local const for a selected expression
`move-function-to-library`	Extract function to library contract for reuse
`move_symbol`	Move a function, class, or type to a different file and automatically update all imports across the codebase. Use instead of manually cut/paste + fixing imports. Works without LSP (single-file); LSP enables cross-file import updates. Params: file (string), symbol (string), destination (string) [, preview (bool), receipt (bool)]
`recipe_run`	Run a codemod recipe: declarative match → transform → optional verify across modeled grammars. Preview lists matches; apply writes with optional E7 receipts and all-or-nothing rollback. Returns a per-site report.
`remove-unchecked-block`	Remove unchecked { } wrapper from a function, keeping inner statements
`remove-visibility-modifier`	Remove redundant visibility modifiers where defaults apply
`rename`	Rename a symbol and automatically update ALL references across the codebase. Safer and faster than find-and-replace — AST-aware, won't rename strings or comments. Works without LSP (single-file); LSP enables cross-file renames. Params: file (string), old_name (string), new_name (string) [, line (u32), column (u32), preview (bool), receipt (bool)]
`rename-contract`	Rename contract declaration and update references
`rename-enum`	Rename enum declaration and update references
`rename-function`	Rename function and update all call sites
`rename-identifier`	Rename a variable, function, or contract across all references
`rename-state-variable`	Rename state variable and update all references
`rename-struct`	Rename struct declaration and update instantiations
`split-variable-declaration`	Split variable declarations into separate statements

Analysis

42 analysis tools, the same on every supported language. Descriptions live in the shared reference: /docs/analysis-tools.

analyze_api_diff analyze_chokepoints analyze_clones analyze_clusters analyze_cohesion analyze_conformance analyze_coupling analyze_cycle_risk analyze_cycles analyze_dead_code analyze_depth analyze_entry_points analyze_export analyze_extraction analyze_fan_balance analyze_features analyze_hotspots analyze_impact analyze_inconsistencies analyze_inheritance analyze_interface_bloat analyze_interfaces analyze_layers analyze_orphan_types analyze_patterns analyze_platform_deps analyze_readiness analyze_roles analyze_seams analyze_stability analyze_surface analyze_test_gaps analyze_thickness analyze_type_completeness churn_hotspots co_change_clusters coverage_overlay ownership_map profile_overlay simulate split_module trace_overlay

Verify

14 verify tools, the same on every supported language. Descriptions live in the shared reference: /docs/verification.

bisect_regression gate generate_test_harness scan secret_surface summarize_pr taint_flow unsafe_surface verify_behavioral_equivalence verify_contract_preserved verify_diff_semantics verify_port_parity verify_side_effects verify_test_impact

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