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🤖 feat: Implement PTC Phases 1-5.6 with cleanup fixes
Programmatic Tool Calling (PTC) infrastructure for executing JavaScript code in a sandboxed QuickJS environment with access to Mux tools. Phases completed: - Phase 1: Experiment flag (PROGRAMMATIC_TOOL_CALLING) - Phase 2: Runtime abstraction (IJSRuntime interface) - Phase 3: QuickJS implementation with Asyncify - Phase 4: Tool bridge exposing tools under mux.* namespace - Phase 4.5: Static analysis (syntax, forbidden patterns, AST-based globals) - Phase 5: code_execution tool definition - Phase 5.5: TypeScript type generation & validation from Zod schemas - Phase 5.6: Cleanup fixes (JSDoc, cache unification, test improvements) Key features: - Sandboxed execution with 64MB memory / 5min timeout limits - TypeScript type checking before execution (blocking errors) - Partial results on failure for debugging - Event streaming for nested tool calls - Abort signal support for cancellation 131 tests passing, make static-check passes. --- _Generated with `mux` • Model: `anthropic:claude-opus-4-5` • Thinking: `high`_
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‎bun.lock‎

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‎package.json‎

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"@ai-sdk/openai": "^2.0.72",
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"@ai-sdk/xai": "^2.0.36",
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"@aws-sdk/credential-providers": "^3.940.0",
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"@jitl/quickjs-wasmfile-release-asyncify": "^0.31.0",
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"@lydell/node-pty": "1.1.0",
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"@mozilla/readability": "^0.6.0",
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"jsdom": "^27.2.0",
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"json-schema-to-typescript": "^15.0.4",
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"parse-duration": "^2.1.4",
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"posthog-node": "^5.17.0",
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"quickjs-emscripten": "^0.31.0",
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"quickjs-emscripten-core": "^0.31.0",
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‎src/common/constants/experiments.ts‎

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export const EXPERIMENT_IDS = {
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POST_COMPACTION_CONTEXT: "post-compaction-context",
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PROGRAMMATIC_TOOL_CALLING: "programmatic-tool-calling",
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[EXPERIMENT_IDS.PROGRAMMATIC_TOOL_CALLING]: {
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id: EXPERIMENT_IDS.PROGRAMMATIC_TOOL_CALLING,
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name: "Programmatic Tool Calling",
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description: "Enable code_execution tool for multi-tool workflows in a sandboxed JS runtime",
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enabledByDefault: false,
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/**

‎src/common/orpc/schemas/stream.ts‎

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programmaticToolCalling: z.boolean().optional(),
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// SendMessage options

‎src/common/types/tools.ts‎

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BashBackgroundListResultSchema,
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BashBackgroundTerminateResultSchema,
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BashOutputToolResultSchema,
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BashToolResultSchema,
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FileEditInsertToolResultSchema,
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FileEditReplaceStringToolResultSchema,
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FileReadToolResultSchema,
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WebFetchToolResultSchema,
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interface CommonBashFields {
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}
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};
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};
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});
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output: string;
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}
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script: string;
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uptime_ms: number;
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exitCode?: number;
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display_name?: string; // Human-readable name (e.g., "Dev Server")
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}
235+
// BashBackgroundListResult derived from Zod schema (single source of truth)
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export type BashBackgroundListResult = z.infer<typeof BashBackgroundListResultSchema>;
290237

291-
export type BashBackgroundListResult =
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| { success: true; processes: BashBackgroundListProcess[] }
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| { success: false; error: string };
238+
// BashBackgroundListProcess extracted from result type for convenience
239+
export type BashBackgroundListProcess = Extract<
240+
BashBackgroundListResult,
241+
{ success: true }
242+
>["processes"][number];
294243

295244
export type StatusSetToolResult =
296245
| {
@@ -309,18 +258,5 @@ export interface WebFetchToolArgs {
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url: string;
310259
}
311260

312-
export type WebFetchToolResult =
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| {
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success: true;
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title: string;
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content: string;
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url: string;
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byline?: string;
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length: number;
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}
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| {
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success: false;
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error: string;
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/** Parsed error response body (e.g., from HTTP 4xx/5xx pages) */
325-
content?: string;
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};
261+
// WebFetchToolResult derived from Zod schema (single source of truth)
262+
export type WebFetchToolResult = z.infer<typeof WebFetchToolResultSchema>;

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