SystemVerilog — 147 Operations for AI Agents

This page is the canonical reference an AI coding agent uses to refactor, query, and analyze SystemVerilog code through the act MCP server. 147 operations available: 73 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

73Refactor

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-access-modifier`	Add public/protected/local access modifier to class member
`add-braces`	Add begin/end braces to single-statement control-flow body
`add-parameter-default`	Add default value to module parameter
`add-sensitivity-list`	Add missing signals to always block sensitivity list
`change-access-modifier`	Change member access level (public to protected, etc.)
`change-parameter-direction`	Change port direction (input to output, etc.)
`convert-always-to-always-comb`	Convert always @(*) to always_comb for combinational logic
`convert-always-to-always-ff`	Convert always @(posedge) to always_ff for sequential logic
`convert-bit-to-logic`	Convert bit to logic for safety (preserve x/z values)
`convert-blocking-to-nonblocking`	Convert blocking (=) to nonblocking (<=) in sequential blocks
`convert-case-to-if-else`	Convert case statement to if-else chain
`convert-comparison-operators`	Convert == / != to === / !== (4-valued logic) or vice versa
`convert-enum-value-list`	Convert between scoped and unscoped enum member usage
`convert-for-to-generate`	Convert procedural for loop to generate block
`convert-generate-to-for`	Convert generate block back to procedural for loop
`convert-if-else-to-case`	Convert if-else chain to case statement
`convert-logic-to-bit`	Convert logic type to bit when x/z values are not needed
`convert-nonblocking-to-blocking`	Convert nonblocking (<=) to blocking (=) in combinational blocks
`convert-parameter-to-localparam`	Convert parameter to localparam if unused externally
`convert-port-to-interface`	Convert prefixed ports into a single interface port
`convert-ternary-to-if-else`	Convert ternary conditional to if-else for clarity
`convert-to-ternary`	Convert if-else expression to ternary conditional (?:)
`extract-function`	Extract expression into new function with return type inference
`extract-interface`	Extract selected ports into a new interface definition
`extract-local-variable`	Extract an expression into a local variable declaration
`extract-modport`	Group signals from an interface into a new modport definition
`extract-module`	Extract module hierarchy into separate file
`extract-parameter`	Extract magic values into module/class parameters
`extract-task`	Extract code block into new task with parameter inference
`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)]
`fix-sensitivity-list`	Rewrite sensitivity list to synthesizable always_comb/always_ff form
`generate-always-comb`	Generate an always_comb block skeleton for combinational logic
`generate-always-ff`	Generate an always_ff block skeleton with reset for sequential logic
`generate-array-declaration`	Generate an array declaration (fixed, dynamic, or associative)
`generate-assertion`	Generate a simple immediate assertion template
`generate-bit-vector`	Generate a logic or bit vector declaration with explicit width
`generate-class`	Generate class template with constructor
`generate-clocking-block`	Generate a clocking block for testbench synchronization
`generate-comparison-operator`	Generate comparison methods (== and !=) for class
`generate-concurrent-assertion`	Generate a concurrent assertion (assert property) template
`generate-constraint`	Generate a constraint block inside a class
`generate-constructor`	Generate a class constructor from member variables
`generate-cover-point`	Generate a coverpoint inside an existing covergroup
`generate-covergroup`	Generate a covergroup template with a clock
`generate-function`	Generate a function template with return type and parameters
`generate-generate-block`	Generate a parameterized generate block (if/case/for)
`generate-interface`	Generate an interface template with optional modports
`generate-methods`	Generate stub methods from a list of method signatures
`generate-modport`	Generate a modport definition inside an interface
`generate-module`	Generate new module template with ports
`generate-port-connection`	Generate a complete port connection list for module instantiation
`generate-randomization-methods`	Generate pre_randomize and post_randomize method stubs for a class
`generate-reset-logic`	Generate a reset sequence block for testbench or RTL
`generate-task`	Generate a task template with input/output parameters
`generate-test-bench`	Generate testbench skeleton with clocking blocks
`generate-test-module`	Generate test module (UVM/custom) template
`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-variable`	Inline variable where used once
`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)]
`invert-conditional`	Swap then/else branches of an if-else and negate the condition
`invert-port-direction`	Swap input/output direction on a module port
`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-braces`	Remove begin/end braces from single-statement control-flow body
`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-class`	Rename class declaration and all instantiations
`rename-function`	Rename function definition and all calls
`rename-identifier`	Rename variable, port, parameter, or signal across all references
`rename-module`	Rename module declaration and all instantiations
`rename-port`	Rename port and all internal/external references
`rename-task`	Rename task definition and all calls
`simplify-boolean-expression`	Remove trivially redundant boolean subexpressions

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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