ReScript — 172 Operations for AI Agents

This page is the canonical reference an AI coding agent uses to refactor, query, and analyze ReScript code through the act MCP server. 172 operations available: 99 refactor, 18 query, 41 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

99Refactor

41Analysis

14Verify

Query

Operation	Description
`callers`	Find every call site of a function or method across the codebase. Use to understand who depends on a function before changing its signature. Requires LSP. Params: symbol (string) [, file (string)]
`control_flow`	Get a function's control flow — branches, loops, early returns, and basic blocks in execution order. Use to understand complex logic without reading the full implementation. Params: target (string), file (string)
`data_flow`	Intra-procedural def-use — variable definitions, uses, def→use edges, and which locals flow into the return. The dual of control_flow. Single-file. Params: target (string), file (string)
`definition`	Jump to definition — find where a symbol is defined given a usage location. Uses AST-based parsing by default, no LSP required. Params: symbol (string), file (string), line (u32), column (u32)
`diagnostics`	Get compiler errors and warnings from the language server. Omit `file` for workspace-wide diagnostics. Pass a file path or directory path to scope results. Requires LSP. Params: none [, file (string)]
`effect_closure`	Transitive effect closure of a function across the call graph — composed reads/writes/raises/allocates/blocks/awaits with provenance, recorded cycles, and the unresolved-call frontier. Params: target (string), file (string) [, max_depth (u32), max_nodes (u32)]
`effect_summary`	Get a function's effect signature — reads, writes, raises, allocates, blocking calls, and awaits — plus the unresolved-call frontier. Single-file, intra-procedural. Params: target (string), file (string)
`fix_auto`	Auto-fix all deterministic issues in a file, directory, or workspace — missing imports, unused imports, simple type errors. Runs multiple fix-revalidate cycles. Use after making changes to clean up automatically. Requires LSP. Params: none [, file (string), workspace_mode (bool), category (string), commit (bool), max_rounds (u32)]
`get_type`	Get the compiler-inferred type of any expression at a position. Use to understand types without reading surrounding code. Requires LSP. Params: file (string), line (u32), column (u32)
`graph`	Build a dependency graph from a file — trace what it imports and what imports it, across multiple hops. Use to understand module relationships and change impact before refactoring. Params: file (string) [, depth (u32), direction (string), leaves (bool), order (string)]
`import_organize`	Organize, sort, and deduplicate imports in a file. Removes unused imports. Use after adding new code or moving symbols to clean up import blocks automatically. Params: file (string) [, preview (bool)]
`interface`	Get a symbol's public API — signatures, types, and docstrings without implementation bodies. Like skeleton but for a single symbol. Use to understand how to call something without reading its internals. Params: target (string), file (string) [, include_private (bool)]
`mutations`	Identify side effects — what external state a function reads or writes (globals, file I/O, network, etc.). Use to understand if a function is pure or has hidden dependencies. Params: target (string), file (string)
`references`	Find every usage of a symbol across the entire codebase — all files, not just the current one. Use before renaming, refactoring, or deleting to understand full impact. Requires LSP. Params: symbol (string), file (string)
`repo_outline`	Get a compressed overview of the entire repository in one call — file tree with languages, line counts, and optionally symbol names per file. Orders of magnitude cheaper than listing directories and reading files individually. Params: none [, path (string), depth (u32), include (glob), exclude (glob), symbols (bool), max_files (u32), relative (bool)]
`skeleton`	Get a file's structure — function signatures, class declarations, type definitions — without implementation bodies. Use INSTEAD of reading the full file to understand its API. Typically 5-10x fewer tokens than reading the raw file. Params: file (string)
`symbols`	List all symbols (functions, classes, variables, types, constants) defined in a file with their locations and kinds. Use INSTEAD of reading a file when you need to know what's defined in it. Much cheaper than reading the full file. IMPORTANT: file must be a path to a single source file — never a directory or empty string. Params: file (string)
`symbols_batch`	Retrieve symbols from multiple files in a single call. Use instead of calling symbols() in a loop — one request instead of N. Params: none [, files (string[]), ids (string[]), kinds (string[])] — provide files or ids

Refactor

Operation	Description
`add-error-handling-to-promise`	Add .catch() to a promise chain
`add-export-declaration`	Mark a symbol as exported (adds interface annotation comment)
`add-import`	Add an open statement for a module
`add-import-alias`	Add a module alias declaration: module Alias = ModulePath
`add-missing-cases`	Add missing switch cases
`add-missing-record-fields`	Add missing required fields to a record literal
`add-module-open`	Prepend an open statement at the top of the file
`add-option-annotation`	Add option<type> annotation to a binding
`add-result-annotation`	Add result<ok_type, err_type> annotation
`add-return-type-annotation`	Add return type annotation to a function
`add-try-catch-around-await`	Wrap async operation in try-catch
`add-type-annotation`	Add a type annotation to a let binding
`add-type-annotation-to-param`	Add type annotation to a function parameter
`convert-callback-to-promise`	Wrap callback-based function in a Promise
`convert-concat-to-template-literal`	Convert ++ string concatenation to a template literal
`convert-curried-to-uncurried`	Convert a curried function (a => b => body) to uncurried form (. a, b) => body
`convert-exception-to-result`	Wrap an exception-raising expression in a result type
`convert-for-loop-to-array-filter`	Convert a for-in loop to an Array.filter call
`convert-for-loop-to-array-map`	Convert a for-in loop to an Array.map call
`convert-for-loop-to-array-reduce`	Convert a for-in loop to an Array.reduce call
`convert-for-loop-to-list-map`	Convert for loop to List.map
`convert-if-else-to-switch`	Convert an if-else chain to a switch expression
`convert-if-to-ternary`	Convert an if-else expression to a ternary (cond ? a : b)
`convert-imperative-to-functional`	Convert imperative mutation to functional pipeline
`convert-let-to-ref`	Convert a let binding to a mutable ref cell
`convert-null-to-none`	Replace Js.null / null with None
`convert-nullable-to-option`	Wrap a nullable JS value in option
`convert-positional-to-labeled-args`	Convert positional function parameters to labeled (~param) form
`convert-promise-chain-to-async`	Convert .then() chain to async/await
`convert-record-to-variant`	Convert a record type definition to a variant
`convert-ref-to-let`	Convert a ref cell back to an immutable let binding
`convert-switch-to-if-else`	Convert a switch expression to an if-else chain
`convert-ternary-to-if`	Convert a ternary expression to an if-else block
`convert-to-option-pattern-match`	Generate a switch pattern match for an Option variable
`convert-to-result-for-safety`	Wrap a fallible expression in a result type
`convert-to-result-pattern-match`	Convert try-catch to pattern match on result
`convert-uncurried-to-curried`	Convert an uncurried function (. a, b) => body to curried form a => b => body
`convert-while-to-recursion`	Convert while loop to tail-recursive function
`extract-condition-to-variable`	Extract complex condition to named binding
`extract-constant`	Extract a literal or expression into a top-level constant binding
`extract-function`	Extract selected lines into a new named function
`extract-record-type`	Extract an inline record literal to a named type
`extract-variable`	Extract an expression into a new local let binding
`extract-variant-type`	Extract an inline variant to a named 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-accessor-functions`	Generate getter accessor functions for each record field
`generate-documentation-comment`	Generate a doc comment block above a binding
`generate-equality-function`	Generate a structural equality function for a type
`generate-external-binding`	Generate a @external binding
`generate-function-stub`	Generate a function stub with Js.log("TODO") body
`generate-impl-stubs`	Generate implementation stubs inside a module block
`generate-module-type`	Generate a module type signature block
`generate-option-wrapper`	Generate an option<'a> wrapper
`generate-record-constructor`	Generate a type declaration for a record type
`generate-record-creator`	Generate a maker function (makeRecord) for a record type
`generate-record-type`	Generate a record type definition from field descriptions
`generate-record-updater`	Generate an updater function for a record
`generate-result-wrapper`	Generate a result<'a, string> error wrapper function
`generate-send-binding`	Generate a @send method binding
`generate-string-representation`	Generate a typeToString conversion function
`generate-test-case`	Generate a single test(...) case with Arrange/Act/Assert comments
`generate-type-definition-docs`	Generate a doc comment for a type
`generate-unit-test-scaffold`	Generate a describe/test scaffold for a module
`generate-variant-matcher`	Generate a pattern match function for a variant
`generate-variant-type`	Generate a variant type definition
`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-constant`	Inline a named constant by replacing all references with its value
`inline-variable`	Inline a let-bound variable by replacing uses with its value
`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-local-binding`	Insert a new let binding at the specified line
`introduce-named-constant`	Extract a literal expression into a named top-level constant
`introduce-parameter-from-local`	Promote a local binding to a function parameter
`invert-if-condition`	Invert the condition of an if-else
`join-adjacent-strings`	Merge adjacent string literals joined with ++
`make-field-optional`	Make a record field optional (option<'a>)
`move-to-module`	Move a symbol into a qualified module path
`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)]
`organize-imports`	Sort and deduplicate open statements alphabetically
`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 unused declarations
`remove-import`	Remove an open statement for a module
`remove-module-open`	Remove a specific open statement from the file
`remove-unnecessary-else`	Remove else branch after early return
`remove-unused-parameter`	Remove a parameter that is never used in the function 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-identifier`	Rename a variable, function, or binding across its scope
`rename-record-field`	Rename a field in a record type definition
`reorder-parameters`	Reorder the parameters of a function definition
`use-option-flat-map`	Convert nested option map to flatMap
`use-option-get-or`	Convert switch on option to Option.getOr
`use-option-instead-of-if`	Replace an Option null-check if-statement with Option.isSome / Option.isNone
`use-option-map`	Convert switch on option to Option.map
`use-record-shorthand`	Convert {x: x} to {x} shorthand
`use-result-flat-map`	Convert nested result map to flatMap
`use-result-map`	Convert switch on result to Result.map
`use-spread-operator`	Convert manual field copies to record spread
`wrap-in-option-for-safety`	Wrap a potentially-missing value binding in Option
`wrap-value-in-option`	Wrap an expression in Some(...)

Analysis

Operation	Description
`analyze_api_diff`	Diff the exported/public symbol surface between merge-base(base_ref, HEAD) and the working tree: per-symbol verdict rows (breaking / possibly-breaking / additive) with both signatures where they changed — removed public symbols, gained parameters, and visibility narrowing are breaking; new exports additive. Visibility-unmodeled grammars yield unjudgeable rows naming the grammar (never silence, never guessed-private); type-level claims only where types are modeled. Params: none [, base_ref (string — omit to diff against HEAD)]
`analyze_chokepoints`	Find files that act as critical bottlenecks — high betweenness centrality in the dependency graph (R4). granularity="symbol" ranks individual functions over the call graph instead of files (capped, with truncation disclosure). Params: none [, granularity (string), include (string[]), exclude (string[])]. Use include/exclude to restrict the scan scope (e.g. include=["crates"], exclude=["corpus"]).
`analyze_clones`	Detect duplicated code as clone classes — type-1 (exact) and type-2 (renamed identifiers/literals) subtree clones with member ranges, token counts, and an extract_function remediation pointer when all members sit in function bodies; type-3 (gapped) clones are not detected. Params: none [, include (string[]), exclude (string[]), min_tokens (number)]. Use include/exclude to restrict the scan scope; min_tokens overrides the minimum clone size (default 50).
`analyze_clusters`	Identify tightly coupled groups of files using community detection. Use to discover natural module boundaries and understand which files change together. Clusters where a hub file glues unrelated files together are flagged via hub_collapse=true and top_hubs (named hub files); pass dampen_top_k (u32) to exclude the top-k highest-degree files from propagation and reveal genuine neighborhoods. Params: none [, granularity (string), min_size (u32), dampen_top_k (u32), include (string[]), exclude (string[])]. Use include/exclude to restrict the scan scope (e.g. include=["crates"], exclude=["corpus"]).
`analyze_cohesion`	Measure intra-module cohesion for each file — ratio of internal to total symbol edges (H2); counts call edges between symbols (syntactic, LSP-enriched when available). Also reports class-level LCOM4 (connected components of each class's method graph — methods linked by a shared field access or intra-class call) with coverage-law disclosure of which grammars were modeled. Params: none [, include (string[]), exclude (string[])]. Use include/exclude to restrict the scan scope (e.g. include=["crates"], exclude=["corpus"]).
`analyze_conformance`	Evaluate the [architecture] contract in .act/config.toml against the actual import graph — deny-rule, layer-rank, and public-surface violations with the offending import's file:line, plus named cycle exemptions (suppressed but counted). Returns contract_present: false when no contract section exists. Params: none [, include (string[]), exclude (string[])]. Use include/exclude to restrict the scan scope.
`analyze_coupling`	Measure coupling per file — how many files depend on it (afferent) vs how many it depends on (efferent), plus instability and abstractness scores; symbol granularity reflects call relationships (syntactic, LSP-enriched when available). Use to find the most critical/fragile files. Params: none [, granularity (string), sort (string: coupling\|instability\|distance\|afferent\|efferent, default coupling = most entangled first), threshold (f64), top_n (u32, default 200), include (string[]), exclude (string[])]. Use include/exclude to restrict the scan scope (e.g. include=["crates"], exclude=["corpus"]).
`analyze_cycle_risk`	Score each circular dependency cycle by its external risk surface (R6 circular risk zones analysis). Params: none [, include (string[]), exclude (string[])]. Use include/exclude to restrict the scan scope (e.g. include=["crates"], exclude=["corpus"]).
`analyze_cycles`	Find circular dependency chains in the codebase. Use to identify import cycles that cause build issues or indicate architecture problems. Params: none [, granularity (string), max_length (u32), include (string[]), exclude (string[])]. Use include/exclude to restrict the scan scope (e.g. include=["crates"], exclude=["corpus"]).
`analyze_dead_code`	Find dead code — functions, classes, and types that are never referenced from any entry point; reachability follows call edges (syntactic, LSP-enriched when available). Use before cleanup to safely identify what can be deleted. Params: none [, entry (string[]), granularity (string), include_tests (bool), include (string[]), exclude (string[])]. Use include/exclude to restrict the scan scope (e.g. include=["crates"], exclude=["corpus"]).
`analyze_depth`	Compute longest transitive dependency chain per file (S4 dependency depth analysis). Params: none [, include (string[]), exclude (string[])]. Use include/exclude to restrict the scan scope (e.g. include=["crates"], exclude=["corpus"]).
`analyze_entry_points`	Detect entry points: main functions, HTTP routes, CLI commands, event listeners, test files (S5). Params: none [, include (string[]), exclude (string[])].
`analyze_export`	Export the full semantic graph (files, symbols, dependencies) in JSON, DOT (Graphviz), or CSV format. Use for visualization or external analysis. Responses are size-bounded: large graphs return truncated:true plus next_cursor — pass it back as cursor to page through; stats always reports full node/edge counts. Params: none [, format (string), cursor (u32), max_bytes (u32, default 1000000, hard cap 4000000), include (string[]), exclude (string[])]. Use include/exclude to restrict the scan scope (e.g. include=["crates"], exclude=["corpus"]).
`analyze_extraction`	Score clusters for service or package extraction viability (M2 extraction candidates analysis); skips hub-collapse artifact clusters (flagged by analyze_clusters). Params: none [, include (string[]), exclude (string[])]. Use include/exclude to restrict the scan scope (e.g. include=["crates"], exclude=["corpus"]).
`analyze_fan_balance`	Compute fan-in/fan-out imbalance for migration ordering guidance (M6 fan balance analysis). Params: none [, include (string[]), exclude (string[])]. Use include/exclude to restrict the scan scope (e.g. include=["crates"], exclude=["corpus"]).
`analyze_features`	Inventory language-specific AST features used in the codebase — async, generics, decorators, etc. (M3). Params: none [, include (string[]), exclude (string[])]. Use include/exclude to restrict the scan scope (e.g. include=["crates"], exclude=["corpus"]).
`analyze_hotspots`	Rank files by composite complexity score — max cyclomatic complexity, statement count, nesting depth (H1). Test files are excluded by default (is_test_file conventions); summary.test_files_excluded discloses the count. Item-level exclusion (e.g. Rust #[cfg(test)]) is per-grammar; summary.item_level_exclusion_grammars names grammars where it was modeled. Params: none [, top_n (u32), include (string[]), exclude (string[])]. Use include/exclude to restrict the scan scope (e.g. include=["crates"], exclude=["corpus"]).
`analyze_impact`	Compute change impact — two modes. File mode (Free, default): finds all files directly and transitively depending on `target` (R1). Symbol mode (Architecture): when `symbol` is set, returns transitive callers of that function symbol — syntactic-floor analysis, LSP-enhanced when available, no LSP required. Append `::<line>` to `symbol` to disambiguate overloads (e.g. `"process::42"`). Params: target (string) [, symbol (string), max_depth (u32), include (string[]), exclude (string[])]. Use include/exclude to restrict the scan scope (e.g. include=["crates"], exclude=["corpus"]). Errors: SYMBOL_NOT_FOUND, AMBIGUOUS_SYMBOL, UNSUPPORTED_SYMBOL_KIND.
`analyze_inconsistencies`	Detect inconsistent abstractions — sibling files in the same directory that diverge from the group's structural pattern (H5). Params: none [, include (string[]), exclude (string[])].
`analyze_inheritance`	Detect tangled inheritance — deep hierarchies (>N levels) and diamond inheritance (H6). Params: none [, include (string[]), exclude (string[])].
`analyze_interface_bloat`	Detect interface bloat — files where the public API is disproportionately large relative to implementation (H3). Params: none [, include (string[]), exclude (string[])].
`analyze_interfaces`	Map cross-module interfaces — symbols that cross directory-module boundaries, ranked by interface width (M4). Params: none [, include (string[]), exclude (string[])]. Use include/exclude to restrict the scan scope (e.g. include=["crates"], exclude=["corpus"]).
`analyze_layers`	Detect architectural layers from directory names and find dependency direction violations (S1+S2); result carries classification_coverage and is marked unreliable below 0.5 coverage (verdicts not-modeled). Params: none [, detect_only (bool), include (string[]), exclude (string[])]. Use include/exclude to restrict the scan scope (e.g. include=["crates"], exclude=["corpus"]).
`analyze_orphan_types`	Find type definitions used exclusively outside their defining directory (H4 orphan types analysis). Params: none [, include (string[]), exclude (string[])]. Use include/exclude to restrict the scan scope (e.g. include=["crates"], exclude=["corpus"]).
`analyze_patterns`	Find code smells — god functions, deep nesting, high coupling, and other structural issues. Use to identify refactoring targets or assess code quality. Params: none [, tier (string), pattern (string), file (string), severity (string), include (string[]), exclude (string[])]. Use include/exclude to restrict the scan scope (e.g. include=["crates"], exclude=["corpus"]).
`analyze_platform_deps`	Detect platform-specific API usage by scanning imports (M5 platform dependencies analysis). Params: none [, include (string[]), exclude (string[])]. Use include/exclude to restrict the scan scope (e.g. include=["crates"], exclude=["corpus"]).
`analyze_readiness`	Compute migration readiness scores per file — composite of complexity, coupling, porting blockers (M1). Params: none [, include (string[]), exclude (string[])]. Use include/exclude to restrict the scan scope (e.g. include=["crates"], exclude=["corpus"]).
`analyze_roles`	Classify files by architectural role: entry point, routing, business logic, data access, config, test, utility, types, generated (S3). Params: none [, include (string[]), exclude (string[])].
`analyze_seams`	Find the natural boundaries between file clusters — the narrowest points where groups of files communicate. Use to identify where to split modules or add API boundaries. Params: none [, min_cluster_size (u32), max_seam_width (u32), include (string[]), exclude (string[])]. Use include/exclude to restrict the scan scope (e.g. include=["crates"], exclude=["corpus"]).
`analyze_stability`	Compute stability index (R2) and detect stable dependency violations (R3) — flags edges where stable modules depend on unstable ones. Params: none [, index_only (bool), include (string[]), exclude (string[])].
`analyze_surface`	Measure API surface area — count exposed functions, types, and complexity at a module boundary. Use to assess whether an API is too large or leaky. Params: none [, boundary (string), files (string), include (string[]), exclude (string[])]. Use include/exclude to restrict the scan scope (e.g. include=["crates"], exclude=["corpus"]).
`analyze_test_gaps`	Detect source files with no or partial test coverage (R5). When coverage_report is supplied (lcov, JaCoCo XML, or coverage.py JSON), statuses are evidence-based (evidence: "lcov"); otherwise convention-based (evidence: "convention"). Params: none [, coverage_report (string), include (string[]), exclude (string[])]. Use include/exclude to restrict the scan scope (e.g. include=["crates"], exclude=["corpus"]).
`analyze_type_completeness`	Analyze type boundary completeness — detect 'any' types, untyped parameters, missing return types at exported function boundaries (M7). Params: none [, include (string[]), exclude (string[])].
`churn_hotspots`	Rank code by git churn — change frequency weighted by recency. Workspace mode (no `file`, Architecture) ranks symbols by score = Σ recency-decayed changes; single-file mode (`file`, Free teaser) returns that file's bare commit count. Honest degradation: grammars without symbol extraction yield file-level facts only. Params: none [, file (string), top_n (u32)=50, max_files (u32)=500]
`co_change_clusters`	Cluster symbols that change together across git history (co-change coupling). Returns clusters with support (shared commits) and confidence. Useful for finding hidden coupling and shotgun-surgery risk. Params: none [, min_support (u32)=3, min_confidence (f64)=0.7, max_files (u32)=500]
`coverage_overlay`	Join line coverage onto symbols — per-symbol covered/hits, plus the count of coverage records that mapped to no symbol. Joins against the current working tree; a disclosure field flags tree-relative unmapped counts and stale-report line drift. Makes test-gap analysis concrete. Auto-detects the report format: lcov, JaCoCo XML, or coverage.py native JSON. Params: report (string, path to a coverage report) [, top_n (u32)]
`ownership_map`	Map code ownership from git blame — per-symbol author line shares and a bus factor (smallest author set owning >50% of lines). Low bus factor = knowledge concentration risk. Identities consolidate via .mailmap when present; otherwise fragmentation_hints disclose suspect identity pairs. Workspace-wide results are ranked lowest-bus-factor-first and capped at top_n. Params: none [, file (string), max_files (u32)=500, top_n (u32)=50]
`profile_overlay`	Join a CPU/sample profile onto symbols — per-symbol self% / total% / inclusive samples, ranked hottest first, plus an unmapped-frames count. Auto-detects the report format: speedscope JSON, or pprof (gzipped protobuf). Params: report (string, path to a profile report) [, top_n (u32)]
`simulate`	Simulate structural refactors in-memory and report before/after deltas — never touches disk (simulated: true). ops is an ordered change script: move_file{from,to}, remove_edge{from,to}, split_file{file,groups:[[symbol]]}, merge_files{files,to}, delete_module{file} (the deletion test — drops the module and re-wires transitive bridges A→M→B⇒A→B). Returns cycles (resolved/introduced), coupling deltas per affected unit, chokepoint centrality changes, deletion deltas for delete_module ops (surface_consumers + surface_modeled — the load-bearing signal of external symbols calling/extending the module's own surface, plus rewired vs severed file-routing edges), and — when an [architecture] contract exists in .act/config.toml — conformance violation deltas (cleared/introduced). Params: ops (required, non-empty) [, include (string[]), exclude (string[])].
`split_module`	Propose how to split a file into cohesive modules — detects symbol clusters (label propagation), scores per-cluster cohesion (compute_cohesion), runs compute_extraction on the real workspace graph to produce a file-level extraction_score, and counts boundary edges (seams). Returns a ModuleSplit with confidence_floor=Syntactic, modeled_kinds=[clusters,cohesion,extraction,seams], and proposed_modules sorted by cohesion descending. Params: file (string)
`trace_overlay`	Join OpenTelemetry spans onto symbols — per-symbol span count and whether the symbol lies on a trace's critical (longest-duration) path. Shows which code actually runs in production. Auto-detects the report format: OTLP/JSON or OTLP-protobuf. Params: report (string, path to an OTLP trace file) [, top_n (u32)]

Verify

Operation	Description
`bisect_regression`	Semantic git-bisect: walk good_ref..bad_ref oldest-to-newest, apply verify_diff_semantics to each adjacent commit pair for the target symbol, and return the first commit that introduced a Behavior hunk. Returns BisectResult { target, file, culprit: { commit, author } \| null, scanned, modeled_kinds }. Pairs where the file is absent at either revision are skipped. Params: file (string), target (string), good_ref (string), bad_ref (string)
`gate`	Deterministic merge gate: discover changed functions from the git diff (working tree vs HEAD, or vs merge-base of base_ref), run verify_diff_semantics + verify_test_impact + verify_side_effects per function, and synthesize MERGE \| REVIEW \| BLOCK \| UNKNOWN per function and overall — UNKNOWN is never presented as MERGE; unmodeled dimensions and tier-blocked files degrade to UNKNOWN with the evidence quoted. receipts: write verification receipts to .act/receipts/ (consumption of valid receipts is always on). Params: none [, base_ref (string), root (string), receipts (boolean)]
`generate_test_harness`	Generate a test scaffold for a target function — extracts the Contract (signature, guards, raises) and synthesises a test file with one happy-path case + one case per guard + one case per error path. Supported across tier-1+ programming languages (TypeScript/TSX, JavaScript, Python, Rust, Go, Java, Kotlin, C#, Swift, Ruby, C, C++, PHP, Scala); grammars with no unit-test idiom return supported:false (documented opt-out). Params: file (string), target (string)
`scan`	Scan a repository for AI-code security issues (hardcoded credentials, .cursorrules backdoors, MCP-config RCE) and return an AI-Code Health Score + remediation bundle (JSON). Private repos require an act101 scan entitlement; public repos are free. Coverage auto-discovery: conventional lcov reports (coverage/lcov.info, lcov.info, target/coverage/lcov.info) are probed and, when found, test-gap statuses are coverage-evidence-based with the report named (and stale-flagged) in the coverage record. Params: none [, root (string), visibility ("public"\|"private"), files (string[] — path-scoped scan; report gains scope section, scores cover the selected files only; conflicts with baseline_write), baseline (string — compare against a committed baseline; report gains new/baselined partition), baseline_write (string — record current findings as the baseline; full scans only), base_ref (string — diff-scoped scan vs merge-base(ref, HEAD); report gains scope section; conflicts with baseline_write)]
`secret_surface`	Surface secret-touching code in a file — credential params, token vars, signing keys, env-secret reads, and hardcoded secret literals — with per-item confidence. Heuristic; LSP upgrades confidence. Params: file (string)
`summarize_pr`	Summarize a changed file by composing verify_diff_semantics across changed symbols and tallying signature, behavior, and format-only changes. Params: file (string) [, base_ref (string)='HEAD', before (string), after (string), targets (string[])]
`taint_flow`	Trace tainted (untrusted) data from sources (request params, env/file reads, argv) to dangerous sinks (raw SQL, eval, command exec, fs path, deserialization) across the call graph, with per-flow steps and the unresolved-call frontier. Params: target (string), file (string) [, max_depth (u32), max_nodes (u32)]
`unsafe_surface`	Surface dangerous constructs in a file — unsafe blocks, dynamic eval, raw SQL sinks, FFI calls, reflective invocation, unsafe deserialization — with per-item confidence. Params: file (string)
`verify_behavioral_equivalence`	Verify two versions of a function have equivalent behavior by structural CFG diff (same branch/loop/exception/return shape). Verdict: equivalent \| changed{dimensions} \| unknown{reason}. scope='refactor' (default, Engineering) or 'port' (Enterprise, cross-language). Params: target (string), file (string) [, base_ref (string)='HEAD', before (string), after (string), scope (string)='refactor']
`verify_contract_preserved`	Verify a function's public + behavioral contract (signature, effects, control-flow shape, return shape, guards, raises) is preserved across two versions. Verdict: preserved \| broken{dimensions} \| unknown{dimensions} — never claims preserved on a dimension the grammar does not model. Params: target (string), file (string) [, base_ref (string)='HEAD', before (string), after (string)]
`verify_diff_semantics`	Classify how a function changed across two versions: each hunk as format \| signature \| behavior (rename/move when symbol-identity is available). Uses model diffs (signature via interface, behavior via CFG/effect diff, format via AST-equal-but-text-different). Params: target (string), file (string) [, base_ref (string)='HEAD', before (string), after (string)]
`verify_port_parity`	Cross-language contract equivalence check (v1): compare the source and ported symbol's signature arity, return presence, effect-kind set, CFG shape, and raise count. A dimension that either grammar doesn't model contributes no evidence — never a false Preserved. Verdict: 'diverged' if any compared dimension differs (dominates); 'preserved' only if all compared dimensions match AND at least two dimensions were jointly modeled (matching signature arity alone is not parity evidence); 'unknown' when too few dimensions are jointly modeled to claim parity (e.g. only signature was comparable). Tier-1 contract analysis runs by default — no code execution. OPT-IN Tier-2: pass execute=true to ALSO run subprocess differential execution for interpreter languages whose runtime is present (node, python3) and a JSON-able source signature — it generates inputs, runs both functions under a ulimit resource cap (CPU/address-space/file-size) in a throwaway temp CWD, and diffs their JSON outputs; verified_by becomes 'execution' and an executed output divergence forces 'diverged'. This is a RESOURCE boundary, NOT a security sandbox (no network isolation). When execution is not eligible (compiled language, absent runtime, non-JSON-able signature) it falls back to Tier-1 cleanly with no false parity claim. Returns ParityReport { verdict: preserved\|diverged\|unknown, dimensions_checked, mismatches, verified_by: 'contract'\|'execution', modeled_kinds, execution?: { cases_run, mismatches, note } }. Params: source_file (string), source_target (string), ported_file (string), ported_target (string), execute (bool, optional, default false)
`verify_side_effects`	Diff a function's side effects between two versions (git working-tree vs HEAD by default, or an explicit before/after pair) — added/removed effects plus the dropped-cleanup class (a removed write/blocking call while an allocation is kept). Params: target (string), file (string) [, base_ref (string)='HEAD', before (string), after (string)]
`verify_test_impact`	The minimal set of tests whose call graph reaches a change — pass `target` for one changed symbol, or omit it to derive the changed set from the file's before/after symbol diff (git working-tree vs base_ref, or explicit before/after). Composes the call-graph engine + test-file detection. Params: file (string) [, target (string), base_ref (string)='HEAD', before (string), after (string), max_depth (u32)=32]

← RegoRobot Framework →