CoffeeScript — 140 Operations for AI Agents

This page is the canonical reference an AI coding agent uses to refactor, query, and analyze CoffeeScript code through the act MCP server. 140 operations available: 66 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.

18Query

66Refactor

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-documentation-comment`	Add documentation comment before a function/class
`add-explicit-return`	Add explicit return to the last expression in a function
`add-import`	Add a require/import statement
`add-null-check`	Wrap expression with existential operator check
`convert-arrow-to-bound`	Convert -> function to => (bound function)
`convert-bound-to-arrow`	Convert => to ->
`convert-callback-to-promise`	Convert callback-style async code to Promise chains
`convert-coffee-class-to-es6`	Migrate CoffeeScript class syntax to ES6 class syntax
`convert-comprehension-to-filter`	Convert filtered comprehension to .filter call
`convert-comprehension-to-map`	Convert list comprehension to .map call
`convert-existential-to-optional-chain`	Convert existential accessor to optional chain
`convert-if-to-ternary`	Convert simple if/else to ternary
`convert-if-to-unless`	Convert if !cond to unless cond
`convert-inline-if`	Convert postfix if to block form
`convert-module-exports`	Convert module.exports to export default
`convert-postfix-if`	Convert block if to postfix form: x if cond
`convert-promise-to-async`	Convert Promise .then/.catch chains to async/await
`convert-prototype-to-class`	Convert prototype-based methods to class-based
`convert-require-to-import`	Convert require to ES6 import
`convert-splat-spread`	Convert splat usage to spread expression
`convert-splat-to-rest`	Convert CoffeeScript splat args... to rest parameter ...args
`convert-string-concat-to-interpolation`	Convert string concatenation to interpolation
`convert-ternary-to-if`	Convert if/then/else ternary to block if/else
`convert-unless-to-if`	Convert unless cond to if not cond
`destructure-array`	Introduce array destructuring assignment
`destructure-object`	Introduce object destructuring assignment
`extract-constant`	Extract expression into a module-level constant
`extract-function`	Extract selected code into a new function
`extract-variable`	Extract expression into a local variable
`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-bound-function`	Generate a bound (fat arrow) function stub
`generate-class`	Generate a new class stub
`generate-coffee-to-ts-shim`	Generate TypeScript shim for a CoffeeScript module
`generate-constructor`	Generate a constructor for a class
`generate-default-export`	Generate module.exports = ClassName
`generate-documentation-comment`	Generate documentation block for a function
`generate-equality-check`	Generate an equals method for a class
`generate-es6-exports`	Generate ES6 export block
`generate-function`	Generate a new function stub
`generate-impl-stubs`	Generate stub method implementations
`generate-method`	Generate a method on a class
`generate-module-exports`	Generate module.exports block
`generate-require-block`	Generate a block of require statements
`generate-test-function`	Generate a test function stub
`generate-test-suite`	Generate a full test suite with describe/it blocks
`generate-toString`	Generate a toString method on a class
`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 function call at the call site
`inline-variable`	Inline a variable's value at all use sites
`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-existential-operator`	Introduce ? existential operator
`move-to-file`	Move a function/class definition to another file
`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-dead-code`	Remove unreachable code after return/throw statements
`remove-explicit-return`	Remove redundant explicit return from last expression
`remove-redundant-return`	Remove redundant return at end of function
`remove-unused-import`	Remove unused require/import
`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 a class by name
`rename-function`	Rename a function by name
`rename-identifier`	Rename any identifier (variable, function, param) at cursor
`rename-method`	Rename a method within a class
`reorder-parameters`	Reorder function parameters
`sort-imports`	Sort require/import statements alphabetically

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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