Sway — 130 Operations for AI Agents

Sway is the smart contract language of the Fuel network, built for predictable execution. act101 surfaces contracts, ABIs, and storage as structure, so agents audit on-chain logic by its shape.

This page is the canonical reference an AI coding agent uses to refactor, query, and analyze Sway code through the act MCP server. 130 operations available: 56 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.

Premium language. Operations on Sway require an Elite license or above. See pricing.

18Query

56Refactor

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-abi-method`	Add a method signature to a Sway ABI block.
`add-abi-supertrait`	Add a supertrait requirement to a Sway ABI declaration.
`add-access-control`	Insert a simple access-control assertion into a Sway function.
`add-configurable`	Add a configurable constant field to a Sway file.
`add-log-statement`	Insert a log statement into a Sway function.
`add-parameter`	Add a Sway function parameter and update same-file direct call sites.
`add-storage-field`	Add a field to a Sway storage block.
`change-configurable`	Change a Sway configurable constant type and default value.
`convert-to-contract`	Convert a Sway program shell to contract form.
`convert-to-option`	Wrap a Sway function return type and expression in Option/Some.
`convert-to-predicate`	Convert a Sway program shell to predicate form.
`convert-to-result`	Wrap a Sway function return type and expression in Result/Ok.
`convert-to-script`	Convert a Sway program shell to script form.
`convert-to-storage-map`	Convert repeated Sway storage fields into a StorageMap field.
`extract-abi`	Generate a Sway ABI block from selected public function signatures.
`extract-function`	Extract selected Sway lines into a new function and replace them with a call.
`extract-struct`	Extract selected Sway struct fields into a new nested struct field.
`extract-to-module`	Extract selected Sway declarations into a named module.
`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-abi-implementation-mismatch`	Synchronize a Sway ABI impl method signature with its ABI declaration.
`fix-missing-storage-initialization`	Add a missing initializer to a Sway storage field.
`fix-storage-read-write-error`	Rewrite a simple Sway storage access to read or write form.
`fix-type-mismatch`	Add a Sway type annotation to a selected binding.
`fix-unused-variable`	Prefix an unused Sway let binding with an underscore.
`gen-abi-definition`	Generate a parse-valid Sway ABI definition.
`gen-access-control-impl`	Generate parse-valid Sway access-control helpers.
`gen-contract-scaffold`	Generate a parse-valid Sway contract scaffold.
`gen-erc20-contract`	Generate a minimal parse-valid SRC20-style Sway contract scaffold.
`gen-event-logging`	Generate parse-valid Sway event logging helpers.
`gen-nft-contract`	Generate a minimal parse-valid SRC721-style Sway contract scaffold.
`gen-predicate-scaffold`	Generate a parse-valid Sway predicate scaffold.
`gen-script-scaffold`	Generate a parse-valid Sway script scaffold.
`gen-storage-definition`	Generate a parse-valid Sway storage definition.
`gen-test-scaffold`	Generate a parse-valid Sway test scaffold.
`implement-abi`	Generate a Sway impl block for an ABI with method stubs.
`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`	Inline a simple Sway function body at same-file call sites and remove the declaration.
`inline-struct`	Inline a simple nested Sway struct into a parent struct field.
`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)]
`merge-modules`	Merge a Sway module into its parent scope.
`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-abi-method`	Remove a Sway ABI method signature when no impl method remains.
`remove-abi-supertrait`	Remove a supertrait requirement from a Sway ABI declaration.
`remove-access-control`	Remove a simple access-control assertion from a Sway function.
`remove-configurable`	Remove an unused configurable constant from a Sway file.
`remove-log-statement`	Remove a simple log statement from a Sway function.
`remove-parameter`	Remove a Sway function parameter and matching same-file direct call arguments.
`remove-storage-field`	Remove an unused field from a Sway storage block.
`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-abi-method`	Rename a Sway ABI method, matching impl method, and direct call sites.
`rename-enum-variant`	Rename a Sway enum variant and same-file qualified references.
`rename-field`	Rename a Sway struct field and same-file field access/literal sites.
`rename-function`	Rename a Sway function and same-file direct call sites.
`rename-struct`	Rename a Sway struct and same-file type/constructor references.

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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